JPH0883654A - Large current connector terminal and structure of electrical connection box using the terminal - Google Patents

Abstract

PURPOSE: To simplify a work by enlarging the contact area of a coupling section. CONSTITUTION: Regarding a male-female coupling section at two positions, male coupling sections 14c and 13c are kept in contact with substrate sections 14b and 13b under the pressure of the first spring pieces 13e and 14e, and coupling sections 14c and 13c are kept in contact with the substrate sections 14b and 13b under the pressure of the second spring pieces 13h and 14h. In order to connect the second relay box 12 and the first relay box 11 to bus bars 15 and 13, a direct coupling method is also applied, using terminals 15a and 13a. In this way, the terminals are integrated with the bus bar 15 housed in an electrical connection box and in the terminal coupling sections, the spring pieces 13e and 14e press the male-female coupling section to the substrate sections for surface contact, thereby maintaining stable contact state. In addition, wide area sections are kept in contact with each other and, therefore, large current can be introduced. Also, terminals can be connected to each other via one-touch operation, thereby simplifying a work and eliminating the need of a separate parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal for large current connection and a connection structure for an electrical connection box using the terminal, preferably a junction box mounted on an automobile, a relay box, a fusible ring box, a fuse. The box is electrically connected easily, and in particular, the box is connected in a state where a large current is supplied to the power source side.

[0002]

2. Description of the Related Art Conventionally, automobiles have been equipped with a junction box for accommodating internal circuit members such as a bus bar, mounting a relay and a fuse, and centrally distributing power and branching circuits. There is. That is, as shown in FIG. 8, in the junction box 1, the fusible link box 2 is connected to the upstream side of the battery connection side, and the relay box 3 is connected to the downstream side of the load side.

The electrical connection between the boxes (electrical connection boxes) 1 to 3 is performed by crimping a terminal (terminal fitting) to the end of the electric wire W, attaching the terminal to the connector 6, and connecting the connector 6 as shown in the figure. Is fitted into a connector accommodating portion formed in a box for connection, or a terminal 5 is attached to an end of the electric wire W, and a bolt / nut is used for the connecting portion 7a formed on the bus bar 7 of another box. Connected.

[0004]

The electric wire W has a larger diameter as the amount of electric current to be applied increases. When the wire W has a large diameter (8 mm ² or more), the terminal 5 attached to the terminal becomes large, and in order to connect the large terminal 5 to the connector 6, a large terminal accommodating chamber is provided in the connector. Therefore, various problems occur. Therefore, when connecting to the power supply side and conducting a large current, the current is divided using a plurality of medium- or small-diameter wires, or the large-diameter wire is used as it is, and the terminal is As shown, the terminal 5 having the round hole 5a for bolting is connected, and the terminal 5 is arranged inside the electric connection box by using a bolt and a nut and connected to the bus bar.

However, when a plurality of electric wires are used as described above, the number of terminals to be connected to each electric wire and the mounting work increase, and the electric wires become large. On the other hand, in the case of bolt tightening, the screw tightening work becomes complicated, and separate parts for the bolt and nut are required, which causes problems.

The present invention has been made in view of the above problems, and is preferably used as a terminal for connecting a large current on the power supply side, and is not connected by bolts and nuts.
It is an object of the present invention to provide a large current connection terminal that can be connected to each other by male and female fitting and a connection structure for an electrical connection box using the terminal.

[0007]

To achieve the above object, the present invention comprises, in claim 1, a first terminal and a second terminal which are electrically connected to each other, and these terminals are formed by bending a conductive metal plate. The first and second terminals are respectively formed between the base plate portion formed of an elongated flat plate and the first spring piece portion protruding from one side edge of the central portion of the base plate portion by bending the base plate portion. A female fitting portion provided on the female fitting portion, a male fitting portion composed of a tip portion of the board portion projecting from the formation position of the female fitting portion to one end side, and a male fitting portion provided to the other end side of the board portion. An electric wire crimping barrel portion, and the first spring piece portion of the first terminal and the first spring piece portion of the second terminal are bent in opposite directions to form the female fitting portions, respectively. Connect the male mating part of the second terminal to the female mating part of one terminal and the first terminal It provides a high current connection terminals that are configured to connect fitted a male fitting portion into the female fitting portion of the second terminal.

According to a second aspect of the present invention, the first and second terminals are electrically connected to each other, and the terminals are formed by bending a conductive metal plate. And a female fitting portion provided by bending the first spring piece portion projecting from one side edge of the central portion of the board portion, and one end side from the formation position of the female fitting portion. A male fitting portion formed of the tip portion of the board portion protruding toward the other end, and a wire crimping barrel portion provided in a portion protruding toward the other end of the board portion, and the second terminal is a board formed of an elongated flat plate. Section, a male fitting section provided on one end side of the board section, and a wire crimping barrel section provided on the other end side of the board section, and the male fitting section of the second terminal is fitted to the female fitting section of the first terminal. We provide high-current connection terminals that are configured to connect by connecting the joints. .

Further, in claim 3, the second spring piece portion is provided by cutting and raising a part of the first spring piece to project into the female fitting portion. The terminal for high-current connection according to item 1 is provided.

Further, according to claim 4, a part of each bus bar housed inside the electric connection box electrically connected to each other is formed by being bent, and is composed of first and second terminals electrically connected to each other. The first and second terminals are formed by bending a part of the bus bar, which is a long and narrow flat plate, and a first spring piece part projecting from the center of one side edge of the base plate. A female fitting portion formed between the base plate portion, a second spring piece portion that is cut and raised from a portion of the first spring piece portion and protrudes into the female fitting portion, and the female fitting portion A male fitting portion provided on the tip portion of the substrate portion protruding from the formation position of the first terminal, and the first spring piece portion of the first terminal and the first spring piece portion of the second terminal are in opposite directions. Bent to form the female fitting portion, and insert the mating male fitting portion into the female fitting portion for connection. It provides a high current connection terminal which has a configuration.

Further, in claim 5, at least one of the first terminal and the second terminal according to claim 4 is projected outward from the outer wall of the box of the electrical junction box to provide the first terminal and the second terminal. (EN) A connection structure for an electric connection box using a high-current connection terminal that directly connects and. Both of the terminal portions connected to each other may be projected from the outer wall of the box of each electric connection box.
Further, a protective wall is provided on the outer wall of the box so as to be located on both sides of the terminal portion projecting from the box so as to protect the terminal portion.

Further, in the electric connection boxes to be connected to each other, one electric connection box is placed in a stationary state, and the other electric connection box is rotated from the side to be connected to each other. The other terminal is fitted and connected while rotating from the side, and in order to make the rotary fitting operation smooth,
It is preferable to form a taper portion along one side edge of the male fitting portion of the terminal.

[0013]

In the terminal according to the first aspect of the present invention, when the first terminal and the second terminal are connected, the female fitting portions of these terminals are fitted in a state protruding in the opposite direction to the board portion. The male fitting portion of the first terminal is inserted into the female fitting portion of the second terminal, and the male fitting portion of the second terminal is inserted into the female fitting portion of the first terminal to be fitted. The male fitting portion inserted into the female fitting portion is pressed against the board portion by the first spring piece portion. As described above, the male fitting portions on the front end side of each other are fitted so as to be held by the female fitting portion of the other party, and the two male and female fitting portions are fitted to each other. Since the flat male fitting portion is brought into surface contact with the board portion of the female fitting portion, a large contact area can be obtained, and thus a large current can be passed.

The same applies to the terminal of claim 2, wherein the male fitting portion of the second terminal is fitted to the female fitting portion of the first terminal, and the male fitting portion is fitted to the first spring piece portion at the fitting portion. It is pressed and clamped. In the second aspect, since only the male fitting portion is formed in the second terminal, there is only one female and male fitting portion, and the contact area is smaller than that in the first aspect. However, if only the male fitting portion is provided, the shape becomes simple, and the outer shape of the connecting portions connected to each other can be reduced.

Further, when the second spring piece portion is cut and raised from the first spring piece portion as described in claim 3, fitting can be held by the two spring piece portions, so that the fitting force can be increased. it can.

Further, as described in claims 4 and 5, terminals are provided in a part of the bus bar housed inside the electric junction box, and these terminals are fitted with male and female so that electricity can be obtained without using electric wires. The connection boxes can be directly electrically connected to each other.

[0017]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. 1 to 4 show a first embodiment, in which a bus bar accommodated in an electric connection box is integrally formed with terminals for large current connection, and the terminals are fitted to each other by male and female, The electric connection boxes are directly connected to each other without using electric wires.

That is, in the first embodiment, the bus bars 13 and 1 accommodated inside the junction box 10, the first relay box 11, the second relay box 12 and the like.
4, 15 are bent to form terminals 13a, 14a, 1
5a is formed, and the junction box 10 is connected to the first relay box 11 by these terminals, and the second relay box 12 is connected to the first relay box 11.

The terminal 13a of the bus bar 13 housed in the junction box 10 becomes the first terminal, and as shown in FIG. 2A, the terminal of the bus bar 13 arranged in the horizontal direction is bent 90 degrees to make it vertically. It is formed to project. The terminal 13a is a vertically long and slender flat plate-shaped substrate portion 1 bent from the bus bar 13.
3b, and the front end portion of the substrate portion 13b is a male fitting portion 13c.
I am trying. The upper edge 13 in the length direction of the substrate portion 13b
A first spring piece portion 13e is provided so as to project from the central portion of d, and the first spring piece portion 13e is bent at a right angle and then bent downward and inclined toward the substrate side to make a V-shaped portion near the tip. After being refracted and the V-shaped refraction portion 13f is pressed against the substrate portion, it is refracted outward. By bending the first spring piece portion 13e in this manner, a female fitting portion 13g having a space S having a downward triangular cross section is formed between the first spring piece portion 13e and the substrate portion 13b. Further, a second spring piece portion 13h cut and raised from the first spring piece portion 13e is provided, and the second spring piece portion 13h is projected into the space S.

As described above, in the female fitting portion 13g of the terminal 13a, the V-shaped bending portion 13f of the first spring piece portion 13e is formed.
Also, the second spring piece portion 13h protrudes toward the board portion 13b, and the male fitting portion to be inserted into the space S is pressed against the board portion 13b. Further, the male fitting portion 13c at the tip of the base plate portion 13b protruding from the female fitting portion 13g is provided with a taper portion 13i that tapers upward along the upper edge thereof.

As shown in FIG. 2 (B), the terminal 14a of the bus bar 14 of the first relay box 11 becomes a second terminal which is fitted and connected to the first terminal 13a, like the terminal 13a. A male fitting portion 14c is formed at the tip of the base plate portion 14b formed by bending the bus bar 14, and the first spring piece portion 14e protruding from the base plate portion 14b is bent to bend the female fitting portion 14g.
And a second spring piece portion 14h cut and raised from the first spring piece portion 14e is formed.

The female fitting portion 13 of the first terminal 13a formed on the bus bar 13 of the junction box 10
g and the female fitting portion 14g of the second terminal 14a formed on the bus bar 14 of the first relay box 11, as shown in FIG. 4, the male fitting portion 14c is fitted to the female fitting portion 13g, and the female fitting portion 14g is fitted to the female fitting portion 13g. The male fitting portion 13c is fitted in the portion 14g, and the male fitting portion 13c is formed so as to project in the opposite direction with respect to the board portions 13b and 14b that are in contact with each other.

The first relay box 11 is formed with the terminals 14a at two positions spaced apart from each other, and one of the second terminals 14a is connected to the junction box 1.
No. 0 busbar is connected to the first terminal 13a, and the other second terminal 14a is connected to the first terminal 15a formed on the busbar 15 of the second relay box 12. The first terminal 15a of the bus bar 15 has the same shape as the first terminal 13a formed on the bus bar 13 of the junction box 10.

The boxes 10, 11, and 12 are provided with the terminals 1 at the required positions on the outer walls 10a, 11a, and 12a.
Insertion holes 10b, 11 through which 3a, 14a, 15a pass
b and 12b are provided so that the terminal is projected outward from the outer wall of the box. The junction box 10 and the second relay box 12 are provided with a pair of first protective walls 10c and 12c, which are spaced at the same intervals,
Hook pins 10d and 12d are provided on the inner surfaces of the first protective walls 10c and 12c. On the other hand, the first relay box 11 is provided with a pair of second protective walls 11c which are arranged so as to be inserted between the first protective walls 10c and 12c, and the hook pins 10d and 12d are obliquely provided on the outer surface side thereof from above. Is provided with a guide groove 11d for inserting, and a fitting hole 11e is provided at the end of the guide groove 11d.

The junction box 10 having the above structure,
A method of connecting the first relay box 11 and the second relay box 12 will be described. As shown in FIG. 1, the first relay box 1 is connected to the stationary junction box 10.
1 is connected by being rotated laterally from a diagonally upper side as indicated by an arrow in FIG. First relay box 11 rotated toward the junction box 10 side
First, the protective wall 11c interferes with the protective wall 10c, and the hook pin 10d of the protective wall 10c is inserted into the guide groove 11d of the protective wall 11c. Therefore, the guide groove 11d is moved by being guided by the hook pin 10d, and the terminal 14a inside the protective wall 11c is moved relative to the terminal 13a.
The fitting is performed in the order shown in (A), (B) and (C).

At the time of the fitting, first, as shown in FIG. 3A, at the corner of the upper end portion where the tapered portion 14i of the male fitting portion 14i on the tip side of the terminal 14a is provided, the terminal 13a is formed.
The first spring piece portion 13e of the female fitting portion 13g is bent and inserted into the internal space S. At that time, since the tip of the male fitting portion 14c, which is inserted into the female fitting portion 13g, is the tapered portion 14i, smooth insertion is possible. Then, Fig. 3
As shown in (B), when the upper edge of the male fitting portion 14i comes into contact with the upper surface of the space of the female fitting portion 13g, the base plate portion 14b rotates downward on the principle of lever using the contact P as a fulcrum. ,
And, it moves forward to the terminal 13a side. Moreover, at this time, it reaches the fitting hole 11e at the tip of the guide groove 11d of the hook pin 10d, and with the hook pin 10d as a fulcrum,
The protection wall 11c also rotates downward. Therefore, FIG.
As shown in FIG. 3, the male fitting portion 14c is inserted into the female fitting portion 13g while the board portion 14b is parallel to the board portion 13b in a horizontal state, and the protective wall 11c is inserted into the protective wall 10c.
It will be in a state of overlapping in parallel with.

At this time, at the same time, the male fitting 13c of the terminal 13a is connected to the female fitting portion 14g of the terminal 14a.
Are engaged by similar operation. Therefore, as shown in FIGS. 4 (A) and 4 (B), male and female fitting occurs at two places. In the two male and female fitting portions, the first spring piece portions 13e and 14e press the male fitting portions 14c and 13c to the base plate portions 14b and 13b, respectively, and the second spring piece portions 13h and 14h respectively. 14
C and 13c are pressed against the substrate parts 14b and 13b.

The connection between the second relay box 12 and the bus bars 15 and 13 of the first relay box 11 is also directly fitted by the terminals 15a and 13a in the same manner as described above.

In this way, the terminals are integrally formed on the bus bars housed inside the electric junction box, and the male fitting portions are pressed against the board portion by the two spring pieces at the fitting portions of these terminals. Since they are in surface contact, stable contact can be secured. Moreover, since the wide surfaces are brought into contact with each other, a large current can be conducted. Furthermore, the terminals can be fitted and connected with one touch.

FIG. 5 shows a second embodiment, which is a first terminal 13 'consisting of a terminal fitting for large current connection which is crimp-connected to the ends of large-diameter electric wires W1 and W2 for large current. The second terminal 14 'is formed, and the large-diameter electric wires W are connected to each other by mating the first and second terminals with each other.

The first terminal 13 'consisting of a terminal fitting formed by punching out and bending a conductive metal plate is a first terminal 13a formed integrally with the bus bar of the first embodiment.
And the barrel part 13k 'for wire crimping on the side where the busbar is connected
Is different from the point that the second spring piece portion is not formed. That is, the female fitting portion 13g 'is provided by bending the first spring piece portion 13e' in the central portion of the board portion 13b ', and the male fitting portion 13c' is formed on the tip side of the female fitting portion 13g '. The configurations are the same. Also, the second terminal 14a '
Differs only in that the female fitting portion 14g 'of the first terminal 13a' projects to the opposite side with respect to the board portion 14b '. The second spring piece is not formed on the second terminal 14a 'either.

The first terminal 13 composed of the above terminal fittings
a 'and the second terminal 14a', the electric wire crimping barrel portions 13k 'and 14' are the insulating coating barrel 1 respectively.
3k'-1 and 14'k-1 and barrel core barrels 13k'-2 and 14'k-2 exposed from the insulating coating.
These barrels are crimped to the insulation coating and the core wire of the large-diameter electric wires W1 and W2, respectively, and fixed to the electric wire ends.

The first terminal 13a 'and the second terminal 14a' are arranged so as to face each other, and the second terminal 14 is attached to the female fitting portion 13g 'of the first terminal 13a'.
The male fitting portion 14c 'of a'is fitted to the female fitting portion 14g' of the second terminal 14a 'by inserting the male fitting portion 13c' of the first terminal 13a '. At that time, the female fitting portion 1
Since there is no second spring piece protruding to 3g 'and 14g',
There is an advantage that the fitting force can be reduced and the connection work becomes easy.

FIG. 6 shows a third embodiment, which comprises a first terminal 13a 'and a second terminal 14a' which are terminal fittings connected to a large-diameter electric wire as in the second embodiment. Is the female fitting portion 13 as in the first embodiment.
The second spring piece portion 13h ′ protruding inside g ′ is formed. Moreover, as in the second embodiment, the wire crimping barrel portion 13k 'is provided on the side opposite to the male fitting portion 13c'. The second terminal 14a 'is similar to the first terminal 13a', except that the female fitting portion 14g 'is projected to the side opposite to the first terminal 13a' with respect to the board portion 14b '.

In the third embodiment, since the second spring piece portions 13h 'and 14h' are provided on the first terminal 13a 'and the second terminal 14a' respectively crimped to the electric wire, the fitting force becomes high, The fixing force can be increased after fitting.

FIG. 7 shows a fourth embodiment, in which the first terminal 13a 'is the same as the third embodiment, but the second terminal 14a' does not have a female fitting portion on the substrate portion 14b ', Only the male fitting portion 14c 'is provided at the tip of the portion 14b'.

The fitting connection between the terminals 13a 'and 14a' is performed in the same manner as in the above embodiment. In the case of the fourth embodiment, since the spring piece portion that acts at the time of fitting is only half, the fitting force is small and the fitting can be easily performed.

When the terminal is formed integrally with the bus bar, it may have the shape of the second and fourth embodiments.

[0039]

As is apparent from the above description, since the terminals of claims 1 and 2 of the present invention have a large contact area in the fitting portion, a large current such as a power supply side circuit is passed. It can be used for connecting circuits. Therefore, unlike the conventional example, it is not necessary to use a plurality of electric wires to connect a circuit for a large current or to fix the terminals with bolts and nuts for tightening the bolts. It can be mated and connected, the work is extremely easy, and no separate parts are required.

In particular, the structure according to claim 1 has two male and female fitting portions, which has the advantage of increasing the contact area. On the other hand, the structure according to claim 2 provides a fitting at the time of connection. It has the advantage that the resultant force can be reduced.

Further, as the structure of claim 3, when two spring piece portions are provided, there is an advantage that the holding force of the male and female fitting portions becomes strong.

Further, according to the structure of claim 4, when the terminals are integrally provided on the bus bar, and when the terminals of these bus bars are directly fitted to each other as in the structure of claim 5, the terminals are connected via a conventional electric wire. Compared with this, there are advantages that the number of work steps is reduced, and the installation space for the electrical junction box can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

2A and 2B are perspective views showing a terminal of the first embodiment.

3 (A), (B), and (C) are front views of relevant parts showing a fitting process of the terminal.

FIG. 4 (A) is a perspective view at the time of fitting, and (B) is I of (A).
It is a -I line sectional view.

5A and 5B are perspective views showing a terminal according to a second embodiment of the present invention.

6A and 6B are perspective views showing a terminal of a third embodiment of the present invention.

7 (A) and 7 (B) are perspective views showing a terminal of a fourth embodiment of the present invention.

FIG. 8 is a perspective view showing a connection structure of a conventional electric junction box.

[Explanation of symbols]

 10, 11, 12 Box (electrical connection box) 13, 14, 15 Bus bar 13a, 14a, 15a Terminal 13b, 14b, 15b Board part 13c, 14c, 15c Male fitting part 13g, 14g, 15g Female fitting part 13e, 14e, 15e 1st spring piece part 13h, 14h, 15h 2nd spring piece part 13i, 14i, 15i Tapered part 13k, 14k Electric wire crimping barrel part

Claims (5)

[Claims] 1. A substrate comprising a first terminal and a second terminal electrically connected to each other, the terminals being formed by bending a conductive metal plate, wherein the first and second terminals are each a slender flat plate. Section, a female fitting section provided between the board section and the first spring piece section projecting from one side edge of the central section of the board section, and one end from the formation position of the female fitting section. A male fitting portion formed of a front end portion of the board portion projecting to the side, and a wire crimping barrel portion provided at a portion projecting to the other end side of the board portion, the first spring piece of the first terminal Part and the first spring piece part of the second terminal are bent in the opposite direction to form the female fitting part, and the female fitting part of the first terminal is fitted with the male fitting part of the second terminal. Configuration in which the male fitting part of one terminal is fitted and connected to the female fitting part of the second terminal To have high current connection terminal. 2. A first and a second terminal electrically connected to each other, wherein the terminals are formed by bending a conductive metal plate, the first terminal comprising a substrate portion made of an elongated flat plate, and the substrate portion. A female fitting portion provided by bending the first spring piece portion projecting from one side edge of the central portion of the board, and the board protruding from the formation position of the female fitting portion to one end side. A male fitting portion formed of a tip portion of the portion, and a wire crimping barrel portion provided in a portion projecting to the other end side of the substrate portion, the second terminal includes a substrate portion formed of an elongated flat plate, and the substrate. The male fitting part provided on one end side of the part and the barrel part for wire crimping provided on the other end side of the board part, the fitting part of the second terminal to the female fitting part of the first terminal The terminal for high current connection that is configured to be inserted and connected to the female fitting part of. 3. The second spring piece portion according to claim 1, wherein a second spring piece portion is provided by cutting and raising a part of the first spring piece to project into the female fitting portion. High current connection terminal. 4. A part of each bus bar housed inside an electric connection box electrically connected to each other is formed by bending.
The first and second terminals are electrically connected to each other, and the first and second terminals are composed of a slender flat plate formed by bending a part of a bus bar, and a central portion of one side edge of the substrate part. A female fitting portion formed by bending the protruding first spring piece portion and the board portion and a part of the first spring piece portion are cut and raised to protrude into the female fitting portion. A second spring piece portion and a male fitting portion provided at a tip portion of the board portion protruding from the formation position of the female fitting portion, and the first spring piece portion and the first spring piece portion of the first terminal. For large current connection, in which the female fitting portion is formed by bending in a direction opposite to the first spring piece portion of the two terminals, and the mating male fitting portion is inserted into the female fitting portion for connection. Terminal. 5. The first terminal and the second terminal are directly connected by projecting at least one of the first and second terminals according to claim 4 outwardly from the outer wall of the box of the electrical junction box. The connection structure of the electric junction box using the large current connection terminal.