JP2907009B2 - Insulating plate and electric connection box provided with the insulating plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating plate used for an electric junction box for an automobile and an electric junction box provided with the insulating plate, and more particularly, to an electric circuit including a large number of fuses and relays. In an electrical junction box that rationally connects the wiring harness by branching, the internal circuit is composed of electric wires and pressure contact terminals, and even if the diameters of the electric wires that make up this internal circuit differ, the space can be efficiently saved. This allows wiring without removing it.

[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, JP-A-6-9682)
No. 0, Japanese Utility Model Laid-Open No. 1-166419, etc.)

[0004] In Japanese Utility Model Application Laid-Open No. 1-166419, both a circuit composed of electric wires and pressure terminals and a circuit composed of bus bars are used for the internal circuit of the electric junction box.
That is, as shown in FIG. 9, the power supply side circuit connected to the battery requires a conductive material for a large current, while the load side circuit branch-connected to the power supply side circuit is a conductive material for a small current. Because it is good and there are many circuit changes, the bus bar 1 is used for the power supply side circuit, the electric wire 2 and the press contact terminal 3 are used for the load side circuit, and the bus bar 1 and the electric wire 2 are connected by the fuse 4.

[0005]

SUMMARY OF THE INVENTION
When the upstream power supply side circuit is constituted by a bus bar and the downstream load side circuit is constituted by an electric wire and a press contact terminal as in the electric junction box described in No. 419, the structure becomes complicated and the Since the mounting mode is different from the mounting mode of the electric wire and the press contact terminal, the number of working steps is increased. further,
A busbar forming mold is required to use the busbar, and a wiring mold is required to use the electric wire,
There is a problem that the cost increases significantly. Also, when the circuit on the power supply side is also used for other vehicles, it often needs to be changed.In that case, if a bus bar is used on the power supply circuit side,
There is a disadvantage that the circuit cannot be easily changed.

The above-mentioned disadvantage can be solved by forming the power supply circuit side with electric wires and press contact terminals. However, the power supply circuit side must use a thick large-diameter electric wire, while the load side circuit has a thin small-diameter wire. Wires and medium-sized wires are used, and when these wires are laid on the same plane, the area occupied by the wires increases, the installation space for the electrical junction box increases, and it cannot be installed in some places. In some cases.

Further, as in the prior art, 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 protrudes from the outer surface of the upper case and the lower case. Since it is provided and has irregularities, there is a problem that the connection of the electric wire to the wiring and the pressure contact terminal cannot be stably performed. Also,
Since the press-contact of the electric wire to the press-contact 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-contact state between the wire and the press-contact terminal cannot be confirmed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been made in view of the above circumstances. The purpose is to make it possible to easily and reliably perform pressure welding between the pressure welding terminal and the wire in a stable state, and to check the quality of the pressure welding condition. And

[0009]

According to the present invention, in order to achieve the above object, according to the present invention, a wiring groove for inserting and holding an electric wire is provided on at least one surface of an insulating plate attached to the inside of a case. At least a part of the groove is formed with a small-diameter small-diameter wire insertion groove portion and a wide-diameter large-diameter wire insertion groove portion on the opening side of the small-diameter wire insertion groove portion, and the small-diameter wire and the large-diameter wire are inserted and held. The present invention provides an insulating plate in which a press contact terminal driving portion having a large groove width is provided at a required portion of the wiring groove.

The wiring groove is formed as a three-stage groove by providing an intermediate-width medium-diameter wire insertion groove between the small-diameter wire insertion groove and the large-diameter wire insertion groove according to the circuit. (Claim 2) Alternatively, the wiring groove is opened on both sides of the insulating plate, and a small-diameter electric wire insertion groove portion is provided at a center portion in a thickness direction of the insulating plate, and a medium-diameter electric wire insertion groove portion and / or a large-diameter electric wire insertion groove portion is provided on both sides. May be provided. (Claim 3) When the opening is formed at both ends, the wiring groove has a three-step shape or a five-step shape.

The press contact terminal driving portion formed in the stepped wiring groove is formed so that the entire width of the groove is large enough to drive a press contact terminal for a large-diameter electric wire. ,
A pressure contact terminal formed continuously for the medium diameter and / or for the large diameter is driven from the small diameter wire insertion groove side so as to be capable of press contact with each wire. (Claim 4) The case where the press contact terminal is driven into the step-shaped wiring groove is a case where the wires that are overlapped and wired are connected to each other. When crimping terminals are individually connected to each electric wire, a single-step wiring groove (that is, a small-diameter electric wire groove for wiring only small-diameter electric wires and a large-diameter electric wire for wiring only large-diameter electric wires) Groove, etc.), and press-connect the terminal into the press-contact terminal driving portion provided in the groove.

According to a fifth aspect of the present invention, a wiring groove is provided inside the case, the wiring groove is provided on at least one surface thereof for inserting and holding an electric wire, and at least a part of the wiring groove is provided with a narrow-width small-diameter electric wire insertion groove portion. A large-diameter wire insertion groove having a wide width is formed in a step shape on the opening side of the small-diameter wire insertion groove so that the small-diameter wire and the large-diameter wire can be inserted and held in an overlapping manner; An insulating plate provided with a press contact terminal driving portion having a large width, an electric wire inserted and held in the wiring groove, and a wire press contact portion on one end side and an input / output terminal portion on the other end side, For the electric wire inserted and held in the wiring groove of the insulating plate, the press-connecting terminal driving portion is used to press-connect the electric wire to the electric wire, and the input / output terminal portion protrudes from the terminal hole provided on the outer wall of the case and connects to the external circuit. And a pressure contact terminal for connection. Providing the electrical junction box.

[0013]

According to the insulating plate of the present invention, when the small-diameter electric wire and the large-diameter electric wire are wired on the same vertical line, the small-diameter electric wire is directly wired into the small-diameter electric wire insertion groove, and then,
A large-diameter electric wire is directly wired in the large-diameter electric wire insertion groove so as to overlap the small-diameter electric wire. As described above, since wires having different diameters can be vertically overlapped and wired, no space is required. In the insulating plate according to the second aspect, wires of three different sizes, small diameter, medium diameter and large diameter, can be arranged on the same vertical line. In addition, the wiring groove formed in the step shape is connected to the wiring groove for the small-diameter electric wire and the wiring groove for the large-diameter electric wire, which are separately formed. The small-diameter electric wire wired in the groove is wired to the small-diameter electric wire insertion groove portion of the wiring groove formed in the step shape.

According to the third aspect of the present invention, the wiring is arranged so that one surface is directed upward, and the wires are sequentially wired in order from a small-diameter wire, and then the insulating plate is reversed and the other surface is directed upward. Since this insulating plate is formed with openings on both sides, many electric wires can be wired on the same vertical line. In this case, although the thickness of the insulating plate becomes large, the space for installing the electric insulating box becomes small, so that the insulating plate is suitably used when there is enough height.

According to the insulating plate of the present invention, a plurality of electric wires which are laid over the wiring grooves formed in a stepped manner can be connected by one press contact terminal. That is, when the press contact terminal is pressed into the press contact terminal driving portion formed at a required portion of the step-like wiring groove from the side of the small diameter wire insertion groove portion, the small diameter wire and the large diameter wire wired in the wiring groove are inserted into one press contact terminal. It can be electrically connected by mounting.

In the electric connection box provided with the insulating plate according to the present invention, the small-diameter electric wire and the large-diameter electric wire are directly inserted into the insulating plate according to the wiring pattern of the electric wire, and then the press-connecting terminal is pressed against the electric wire. And attach it. At this time, the case is not attached to the insulating plate, and in this state, it is possible to confirm the quality of the press contact state between the press contact terminal and the electric wire. Then,
The case is arranged on the insulating plate, and the case is attached to the insulating plate while the input / output terminal portions of the press contact terminals protruding from the insulating plate penetrate through the terminal holes of the case. As described above, the use of an insulating plate that allows wires of different diameters to be overlapped and wired in the vertical direction allows a large-diameter wire on the power supply circuit side and a small-diameter wire on the load circuit side to be arranged on the same vertical line, and electrical connection When the internal circuit of the box is formed entirely of electric wires without using a bus bar, the electric connection box can be reduced in size without taking up space.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 to 5 show an electric connection box provided with an insulating plate 12 according to the first embodiment. As shown in FIG. 1, the electric connection box has a single thick wall inside an upper case 10 and a lower case 11. This is a configuration in which the insulating plate 12 is sandwiched. On the lower surface 12a of the insulating plate 12, a plurality of one-stage wiring grooves 13 (13A, 13B) for inserting and holding a plurality of wires and a step-like wiring groove 30 composed of a plurality of stages are provided in accordance with a wiring pattern. The small-diameter electric wires 14 and / or the large-diameter electric wires 15 are directly inserted into the wiring grooves 13 and 30 from an electric wire feeder (not shown). The press-contact portions 16a, 17a, 31a of the press-contact terminals 16, 17 and 31 are press-fitted into the electric wires 14, 15 held inside the wiring grooves 13 and 30, and press-connected to each other. Input / output terminal section 16b,
17b and 31b protrude from terminal holes 19 and 20 formed in the outer walls of the upper case 10 and the lower case 11, respectively.

More specifically, the upper case 10, the lower case 11, and the insulating plate 12 are all formed of an insulating resin such as polypropylene. As shown in FIG. 2, the upper case 10 has a lower end surface opening, an upper wall portion 10a, a fuse fitting portion 21, and a connector connected to a load-side electric wire.
(Not shown) to form a connector portion 22 for fitting,
The terminal holes 19 are formed in the inner surfaces of the fuse fitting portion 21 and the connector portion 22 surrounded by the peripheral wall. On the other hand, the lower case 11 has an upper end surface opening, and a connector portion 23 for fitting a connector connected to the load-side electric wire protrudes from a lower wall portion 11a thereof. A terminal hole 20 is formed. Outer peripheral walls 10b and 1 of the upper case 10 and the lower case 11
The tip surfaces of 1b are in contact with each other to form an electric junction box.

As shown in FIG. 1, the insulating plate 12 is formed into a shape that is just tightly fitted in an internal space formed when the upper case 10 and the lower case 11 are in contact with each other. It is a flat plate with a certain thickness. The insulating plate 1
On the lower surface 12a side which is in contact with the inner surface of the lower case 11,
As shown in FIGS. 4A and 4B and FIG. 5, wiring grooves 13 and 30 are provided corresponding to the wiring pattern.

The wiring groove 13 is composed of a wiring groove 13A for inserting the small-diameter electric wire 14 and a wiring groove 13B for inserting the large-diameter electric wire 15, and each has a straight shape or a partially bent U-shape in plan view. . The wiring groove 30 has an inverted shape, and both the small-diameter electric wire 14 and the large-diameter electric wire 15
Are formed in a stepped shape that can be wired in the thickness direction. The wiring groove 30 has one end of the small-diameter electric wire insertion groove portion 30A connected to the wiring groove 13A of the small-diameter electric wire and one end of the large-diameter electric wire insertion groove portion 30B connected to the wiring groove 13B of the large-diameter electric wire.
To be continuous.

More specifically, the wiring groove 30 is formed by opening the lower surface 12a side of the insulating plate 12, and a wide large-diameter electric wire insertion groove portion 30B for wiring the large-diameter electric wire 15 from the lower surface 12a.
And a narrow small-diameter electric wire insertion groove portion 30A for wiring the small-diameter electric wire 14 from the center of the bottom surface of the large-diameter electric wire insertion groove portion 30B. The width of the small-diameter wire insertion groove 30A and the large-diameter wire insertion groove 30B is the same as the diameter W of the wires 14 and 15.
It is slightly smaller than 1. Further, the depth of the large-diameter electric wire insertion groove portion 30B is set to be about 1.10 with respect to the diameter W1 of the large-diameter electric wire 15.
The depth is set to five times, and the depth of the small-diameter electric wire insertion groove portion 30A is set to be substantially the same as the diameter of the small-diameter electric wire 14.
The thickness of the insulating plate 12 is larger than the entire depth of the wiring groove 30 from the lower surface 12a to the bottom surface of the small-diameter wire insertion groove 30A.

The electric wires 14, 1 inserted into the wiring groove 30 are
5 are connected to the press contact terminal 31, the side walls 30a, 30b of the large-diameter wire insertion groove 30B are widened to form a press contact terminal driving portion 32 having an upper surface opening. The press contact terminal driving portion 32 extends from the upper surface 12b of the insulating plate 12, and does not penetrate to the lower surface 12a.
0B. The press contact terminal driving portion 32 is formed at a position facing the terminal hole 19 of the fuse fitting portion 21 of the upper case 10.

The wiring grooves 13A and 13B are connected to the electric wire 1 respectively.
Wiring grooves 13A, 13 corresponding to diameters W1, 4 and 15, respectively.
B, the width W2 is set to W1 ≧ W2, and the width of the wiring groove 14
The relationship between the depth H and the wire diameter W1 is set to H ≧ 2W1. Note that the depth H of the wiring groove 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.

In the portion where the small-diameter electric wire 14 inserted into the wiring groove 13A and the press contact terminal 16 are connected, the wiring groove 1
The side wall 13a, 13b of 3A is widened to form a press-contact terminal driving portion 24 having a lower surface opening with a groove width of W3. Also,
In the wiring groove 13B, a press contact terminal driving portion 25 having an upper surface opening penetrating from the bottom surface portion to the upper surface 12b of the insulating plate 12 is formed. The press contact terminal driving portion 25 does not extend to the lower surface 12a of the insulating plate 12, but is formed from the upper surface 12b to an intermediate portion between the side walls 13a and 13b of the wiring groove 13. Further, the upper surface 12 of the insulating plate 12 is also provided in a part of the wiring groove 13A.
A press contact terminal driving portion 26 opened to the side b is formed.
The press contact terminal driving portion 24 is provided in the terminal hole 20 of the lower case 11.
The pressing terminal driving portion 25 faces the terminal hole 19 of the fuse fitting portion 21 of the upper case 10, and the pressing terminal driving portion 26 faces the terminal hole 20 of the connector portion 22 of the upper case 10. Is provided.

As shown in FIG. 5, the press contact terminal 31 that presses against the wiring groove 30 is made of a conductive metal plate, has a male input / output terminal portion 31b on one side, and has a male input / output terminal portion 31b on the other side. The pressure contact portion 31a is bifurcated, and the width of the pressure contact portion 31a is sized to be pressed into the pressure contact terminal driving portion 32. At the center of the pressure contact portion 31a, a slot 31c which is cut out in a convex shape is provided. The slot 31c has a large-diameter slot portion 31c-1 with the insertion end side having substantially the same width as the diameter of the core wire of the large-diameter electric wire 15, and the input / output terminal portion 31b side has the core wire of the small-diameter electric wire 14. The diameter of the small diameter slot portion 31c-2 is substantially the same as the diameter of the small diameter slot portion 31c-2.

The large-diameter electric wire 1 is driven into the wiring groove 13B.
The press contact terminal 17 for press contact with the wire 5 and the press contact terminal 16 for driving into the wiring groove 13A to press against the small-diameter electric wire 14 have the same shape as that of the related art, and are formed of a conductive metal plate. 16b, 17b, a wire press-contact portion 16 having a bifurcated branch on the other side and a slot (not shown) in the center.
a and 17a. These press contact terminals 16,
The wire press-contact portions 16a and 17a of the 17 are dimensioned to be press-fitted into the press-contact terminal driving portions 24, 25 and 26.

Next, a method of assembling the electric junction box including the above members will be described. First, with the lower surface 12a of the insulating plate 12 facing upward, the wiring groove 13A for the small-diameter electric wire and the small-diameter electric wire insertion groove portion 30A of the wiring groove 30 among the wiring grooves 13 and 30 are set.
Then, the small-diameter electric wire 14 is sent out by an electric wire feeder and directly inserted. At this time, since the width of the wiring groove 13A and the small-diameter wire insertion groove 30A is set to be slightly smaller than that of the electric wire 14, and the small-diameter wire 14 is press-fitted, the small-diameter inserted into the wiring groove 13A and the small-diameter wire insertion groove 30A. Electric wire 14
Even if there is a bend in the wiring groove 13A, it can be reliably held without being lifted from the wiring groove 13A.

Next, the large-diameter electric wire 15 is sent out by an electric wire feeder and directly inserted into the large-diameter electric wire wiring groove 13B and the large-diameter electric wire insertion groove portion 30B of the wiring groove 30. In the case of the large-diameter electric wire 15, since the depth of the groove is increased and the width of the groove is reduced and the electric wire is press-fitted, the large-diameter electric wire 15 rises from the wiring groove 13 </ b> B and the large-diameter electric wire insertion groove 30 </ b> B. Can be inserted without the need. When the wires 14 and 15 are inserted into the wiring grooves 13A and 13B and the small-diameter wire insertion groove 30A and the large-diameter wire insertion groove 30B of the wiring groove 30,
Since the insulating plate 12 is flat and has no irregularities, the electric wire can be inserted in a stable state. In this state, the small-diameter electric wire 14 and the large-diameter electric wire 15 are wired in the wiring groove 30 so as to overlap in the thickness direction of the insulating plate 12.

The electric wire 1 to the wiring grooves 13 and 30 of the insulating plate 12
When the wirings 4 and 15 are completed, first, the press contact terminals 16 are press-fitted into the press contact terminal driving portions 24. At this time, the wire press-contact portions 16a of the press-contact terminals 16 are connected to the small-diameter wire 14 at both end edges of the slot.
And cut the insulating coating. In the press-connecting step, the press-connecting terminal 16 is electrically connected to the core wire of the electric wire 14 and, at the same time, attached to the insulating plate 12.
Protruding from the lower surface side.

Next, the insulating plates 12 are turned upside down, and the insulation displacement terminals 16, 17, 30 are inserted into the insulation displacement terminal driving portions 26,
Press into 25 and 32. By the press-fitting of the press-connecting terminals 16, the press-connecting terminals 16 are connected to the small-diameter electric wires 14 and attached to the insulating plate 12 at the same time, and the input / output terminals 16 b protrude from the upper surface of the insulating plate 12. Similarly, when the press contact terminal 17 is connected to the large-diameter electric wire 15 and attached to the insulating plate 12, the input / output terminal portion 17 b of the press contact terminal 17 protrudes from the upper surface of the insulating plate 12.

The press-fitting terminal 31 is press-fitted to connect the press-fitting terminal 31 to the small-diameter electric wire 14 and the large-diameter electric wire 15 and, at the same time, is attached to the insulating plate 12.
An input / output terminal portion 31b of the press contact terminal 31 protrudes from the upper surface of the terminal. That is, the press-contact terminal 31 is pressed into the press-contact terminal driving portion 32 with the press-contact terminal 31a of the press-contact terminal 31 and the opening of the press-contact terminal driving portion 32 facing each other. Thereby, the large-diameter slot portion 31 is formed.
At the same time that c-1 cuts the insulating coating of the large-diameter electric wire 15,
The small-diameter slot 31c-2 cuts off the insulating coating of the small-diameter electric wire 14, and the large-diameter slot 31c-1 cuts the large-diameter electric wire 15.
And a small diameter slot 31c.
-2 is electrically connected to the core wire of the small-diameter electric wire 14. Therefore, the small-diameter electric wire 14 and the large-diameter electric wire 15 are electrically connected via the press-contact terminal 31.

As described above, the wiring grooves 13 A, 1
In a state where the press contact terminals 16, 17, 31 are press-connected to the electric wires 14, 15 wired to 3B, 30, the insulating plate 1
Upper case 10 and lower case 1 on the upper and lower surfaces of 2
1 is not attached, each of the insulation displacement terminals 16, 1
It is possible to confirm the quality of the press-contact state between the wires 7 and 31 and the wires 14 and 15.

Then, 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
The input / output terminal portions 17b and 30b of the press contact terminals 17 and 31 connected to the large-diameter electric wire 15 are protruded from the connector, and the input / output terminal portion 16b of the press contact terminal 16 connected to the small-diameter electric wire 14 from the terminal hole 19 of the connector portion 22. Protrude. Further, the small-diameter electric wire 1 is inserted through the terminal hole 20 of the connector portion 23 of the lower case 11.
The input / output terminal portion 16b of the press contact terminal 16 connected to 4 is projected.

The internal circuit of the electric junction box assembled as described above is entirely composed of the small-diameter electric wire 14, the large-diameter electric wire 15, and the press-connecting terminals 16, 17, 31 connected thereto. That is, the power supply side circuit is constituted by the large-diameter electric wire 15 and the press-contact terminals 17 and 31 connected to the large-diameter electric wire 15 by press-fitting,
These terminal portions 17b and 31b are connected to a fuse (shown in FIG. 2) to be attached to the fuse fitting portion 21. on the other hand,
The load-side circuit includes a small-diameter electric wire 14 and a press-contact terminal 16 that is press-connected to the small-diameter electric wire 14.
Is connected to a load-side connector fitted to the connector portions 22 and 23.

As described above, the electric connection box of the present invention does not use the bus bar in the internal circuit, and is entirely composed of the electric wire and the press contact terminal, so that it is possible to easily cope with a circuit change.
In addition, the insulating plate 12 is provided with a stepped wiring groove 30 including a small-diameter electric wire insertion groove portion 30A and a large-diameter electric wire insertion groove portion 30B,
Since the small-diameter electric wires 14 and the large-diameter electric wires 15 are wired in two stages, the occupied area can be reduced even if the small-diameter electric wires 14 and the large-diameter electric wires 15 are mixed. It does not change. And electric wires 14, 15
Can be connected by one press contact of the press contact terminal 31,
Work man-hours can be reduced.

FIG. 6 shows an insulating plate 12 according to a second embodiment. The insulating plate 12 is connected to an electric connection box by a small-diameter electric wire 14 and a medium-diameter electric wire 35 for a load-side circuit and a power-supply-side circuit. This is for wiring three kinds of electric wires with the large-diameter electric wire 15.
The insulating plate 12 has a larger diameter electric wire 1 than the lower surface 12 a of the insulating plate 12.
5, a large-diameter electric wire insertion groove 30B, a medium-diameter electric wire insertion groove 30C for wiring a medium-diameter electric wire 35 at the bottom center of the large-diameter electric wire insertion groove 30B, and the medium-diameter electric wire insertion groove 3
A three-stage wiring groove 30 is provided at the center of the bottom surface of 0C, and the small-diameter electric wire insertion groove 30A for wiring the small-diameter electric wire 14 is continuously recessed. These insertion grooves 30B, 30C, 30
A, the depth of the wiring groove 30 formed by the insulating plate 1
The thickness is set to be the same as that of No. 2 so that the small-diameter wire insertion groove 30A penetrates the upper surface 12a.

As described above, the electric wires 14, 1 of three diameters
The electric junction box for wiring the wires 5 and 35 has a problem that the occupied area for arranging these electric wires is large. However, the use of the insulating plate 12 provided with the wiring groove 30 causes the above problem. Can be prevented.

FIG. 7 shows an insulating plate 12 according to a third embodiment. The insulating plate 12 has upper and lower surfaces opened to form the wiring groove 30, and a small-diameter electric wire is provided at the center of the insulating plate 12 in the thickness direction. An insertion groove portion 30A is provided, and large-diameter electric wire insertion groove portions 30B, 30B are provided on the upper and lower sides of the small-diameter electric wire insertion groove portion 30A to form a three-stage shape.

FIG. 8 shows an insulating plate 12 of the fourth embodiment. The insulating plate 12 has a wiring groove 30 formed by opening the upper and lower surfaces similarly to the third embodiment. A small-diameter electric wire insertion groove 30A is provided at the center in the vertical direction, and medium-diameter electric wire insertion grooves 30C and 30 are provided on both upper and lower sides of the small-diameter electric wire insertion groove 30A.
C, and large-diameter electric wire insertion grooves 30B, 30B are provided on both outer sides of the medium-diameter electric wire insertion grooves 30C, 30C to form a five-stage shape.

In the third and fourth embodiments, the insulating plate 1
The press-connecting terminal is not pressed against the medium-diameter electric wire 35 and / or the small-diameter electric wire 14 to be wired at the central portion of the cable 2, but the press-connecting terminal is connected only to the large-diameter electric wire 15 located outside. When the wiring groove is formed in the insulating plate as shown in the third and fourth embodiments, the occupation area required for wiring the wires can be further reduced as compared with the first or second embodiment, and the electric connection can be reduced. The size of the entire box can be reduced.

The present invention is not limited to the above configuration. For example, the wiring grooves 14, 15, 30 are formed by opening the lower surface of the insulating plate 12, but are formed by opening the upper surface. A configuration in which wiring grooves having openings on the upper surface side and the lower surface side are mixed may be adopted.

[0042]

As is apparent from the above description, according to the insulating plate of claims 1 to 3 of the present invention,
In addition to providing a large-diameter wire insertion groove for wiring large-diameter wires,
Since the small-diameter electric wire insertion groove portion is provided on the bottom surface of the large-diameter electric wire to form a stepped wiring groove, electric wires having different diameters can be overlapped and wired in the thickness direction of the insulating plate. Therefore, in the conventional example, when wires having different sizes are arranged on the insulating plate, a problem that the insulating plate becomes large occurs. However, this problem can be prevented.

Further, since the wiring grooves formed stepwise as described above and the wiring grooves not formed stepwise are recessed at a required depth, the diameter of these wiring grooves is small. Wires and large diameter wires can be wired directly. Therefore, the cost can be reduced by eliminating the need for a wiring mold that has been required conventionally. In addition, since there is no unevenness on the surface of the insulating plate, it is possible to perform the wiring work of the electric wire and the press-contact operation of the press-connecting terminal in a stable state.

According to the insulating plate of the present invention, the press-connecting terminal is formed so that the press-connecting terminal for press-contacting the wire which is overlapped with the wire is press-fitted from the small-diameter wire side, and the slot of the press-connecting terminal is formed. Since the wires are formed in a stepped shape, all the wires can be electrically connected to each other in a single press-welding. Therefore, when connecting the circuit on the power supply side and the circuit on the load side, the number of work steps can be reduced, and the workability can be improved. If there is a change in the circuit on the load side and the power supply side, change the pressure contact position of the crimp terminal to the small-diameter electric wire and the large-diameter electric wire wired in the wiring groove that is not formed stepwise as described above. Can be easily handled.

According to the fifth aspect of the present invention, according to the electrical junction box provided with the insulating plate of the first to fourth aspects, the case is mounted in a state where the electric wires and the crimp terminals are arranged on the insulating plate as described above. Therefore, it is possible to confirm the quality of the press-contact state between the press-connecting terminal and the electric wire in a previous process in which the case is not attached, so that it is possible to prevent the occurrence of defective products in the electric connection box. In addition, by forming the wiring grooves on both sides of the insulating plate, the size of the insulating plate can be reduced, and the size of the entire electrical junction box can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an electric connection box using an insulating plate according to a first embodiment of the present invention.

FIG. 2 is a plan view showing an upper case of the electric junction box.

FIG. 3 is a bottom view showing a lower case of the electric junction box.

4A and 4B show the insulating plate of the first embodiment, wherein FIG. 4A is a bottom view of a main part, and FIG. 4B is a perspective view of a main part.

FIG. 5 is a cross-sectional view showing a state where the electric wires and the press contact terminals are inserted into the insulating plate.

FIG. 6 is a sectional view showing an insulating plate of a second embodiment.

FIG. 7 is a sectional view showing an insulating plate of a third embodiment.

FIG. 8 is a sectional view showing an insulating plate according to a fourth embodiment.

FIG. 9 is a wiring diagram showing an internal circuit of a conventional electric junction box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Upper case 11 Lower case 12 Insulating plate 12a Lower surface (one surface) 12b Upper surface (other surface) 13 Wiring groove 13A Wiring groove for small diameter wires 13B Wiring groove for large diameter wires 14 Small diameter wires 15 Large diameter wires 16, 17 Pressure contact terminals 30 Step-shaped wiring groove 30A Small-diameter wire insertion groove 30B Large-diameter wire insertion groove 31 Pressure contact terminal for stepped wiring groove

Claims (5)

(57) [Claims] 1. An insulating plate mounted inside a case, wherein at least one surface of the insulating plate is provided with a wiring groove for inserting and holding an electric wire, and at least a part of the wiring groove is a small-diameter small-diameter electric wire insertion groove portion; A large-diameter electric wire insertion groove having a wide width is formed in a step shape on the opening side of the insertion groove so that the small-diameter electric wire and the large-diameter electric wire can be inserted and held in an overlapping manner, and the groove width is increased at a required portion of the wiring groove. An insulating plate provided with a press-fit terminal insertion portion. 2. The insulating plate according to claim 1, wherein an intermediate-width medium-diameter wire insertion groove is provided between the small-diameter wire insertion groove and the large-diameter wire insertion groove to form a three-stage groove. 3. The wiring groove is opened on both sides of the insulating plate, and a small-diameter electric wire inserting groove portion is provided at a center portion in a thickness direction of the insulating plate, and a medium-diameter electric wire inserting groove portion and / or a large-diameter electric wire inserting groove portion are provided on both sides. The insulating plate according to claim 1, wherein 4. The press-contact terminal driving portion formed in the step-like wiring groove is formed so that the entire groove width is set to a width in which a press-contact terminal for a large-diameter electric wire can be driven. 3. The insulating plate according to claim 2, wherein a pressure contact terminal formed continuously from a large-diameter use to a small-diameter use is formed so that a large-diameter slot is driven from the small-diameter electric wire insertion groove side to be press-contacted with each electric wire. . 5. A case, a wiring groove attached to the inside of the case and provided on at least one surface thereof for inserting and holding an electric wire, and at least a part of the wiring groove is a small-diameter small-diameter electric wire insertion groove portion; A wide large-diameter electric wire insertion groove portion is formed stepwise on the opening side of the groove portion so that a small-diameter electric wire and a large-diameter electric wire can be inserted and held in an overlapping manner, and the groove width is increased at a required portion of the wiring groove. An insulating plate provided with a press-contact terminal driving portion, an electric wire inserted and held in the wiring groove, a wire press-connecting portion on one end side, and an input / output terminal portion on the other end side; The wire inserted and held in the groove is driven into the wire by press-fitting with the press-connecting terminal driving portion, and the input / output terminal portion protrudes from a terminal hole provided on the outer wall of the case and is connected to an external circuit. An electric connection box provided with an insulating plate having: