WO2017169613A1

WO2017169613A1 - Substrate-equipped connector and electrical connection box

Info

Publication number: WO2017169613A1
Application number: PCT/JP2017/009404
Authority: WO
Inventors: 勇也尾賀
Original assignee: 住友電装株式会社
Priority date: 2016-03-29
Filing date: 2017-03-09
Publication date: 2017-10-05
Also published as: JP6642193B2; JP2017182980A

Abstract

A substrate-equipped connector (11) is equipped with: a housing (21) that has a hood section (22) and a far-wall section (24) for closing the hood section (22), and has a first through-hole (25) formed therein that passes through the far-wall section (24), and a second through-hole (26) formed therein that passes through the far-wall section (24) above or below the first-through hole (25); a busbar substrate (50) that has a busbar (51) comprising a metal and corresponding to the shape of a conduction path, has an outer section (56) for holding the busbar (51), and also has a busbar terminal (52) projecting in a direction that extends along the plate surface of the busbar (51), and inserted into the first through-hole (25); a connection terminal (30) that projects into the hood section (22) while inserted into the second through-hole (26), and connects to the busbar substrate (50) on the rearward side of the housing (21); and base sections (40A, 40B) that hold the connection terminal (30) and overlap the busbar substrate (50).

Description

Connector with board and electrical connection box

The technology described in this specification relates to a connector.

Conventionally, a technique for connecting a connector terminal to a conductive path of a circuit board is known. In the electrical junction box of Patent Document 1, a plurality of connection terminals extending linearly are supported by a first pedestal and a second pedestal, and the first pedestal and the second pedestal are coupled to each other. And, the lower end portion of each connection terminal is inserted into the terminal hole of the printed circuit board and soldered, and is accommodated in the lower case, and the upper end portion of the connection terminal is the connector accommodating portion provided in the upper case. Projects outward from the terminal hole.

JP 2006-6052 A

By the way, in the above configuration, the pitches of the plurality of connection terminals are held at the same pitch by the plurality of pedestals on the printed circuit board. When the connection terminals are held in this way, the connection terminals extend in a direction orthogonal to the board surface of the printed circuit board. Therefore, the dimensions of the electrical connection box increase in the direction in which the connection terminals extend, and the electrical connection box becomes smaller. There is a problem that it is contrary to the request for conversion.

The technology described in the present specification has been completed based on the above-described circumstances, and can be miniaturized while holding a plurality of stages of terminals with different members and an electrical connection. The purpose is to provide a box.

The connector with a board described in the present specification has a hood portion and a back wall portion that closes the hood portion, and is a first stage through the back wall portion and an upper stage with respect to the first through hole. A bus bar having a second through hole penetrating the back wall portion on the side or the lower side, a bus bar made of metal corresponding to a shape of a conductive path, and an exterior portion for holding the bus bar, A bus bar terminal protruding in a direction along the plate surface of the bus bar board is inserted into the first through hole, and protrudes into the hood portion while being inserted into the second through hole, and a rear side of the housing is the bus bar board And a pedestal that holds the connection terminal and is superimposed on the bus bar substrate.
According to the above configuration, the bus bar terminal is held by the exterior part, and the connection terminal arranged on the upper stage side or the lower stage side of the connection terminal is held by the pedestal part. Can be held. In addition, since the bus bar terminal protruding in the direction along the plate surface of the bus bar on the bus bar substrate is inserted into the first through hole of the housing to form the connector, the dimension in the direction perpendicular to the plate surface of the bus bar substrate is reduced. Can do. Further, even when the housing and the bus bar substrate are assembled in such a posture, since the bus bar substrate having a strength higher than that of the printed circuit board is generally used, problems after the assembly can be suppressed. Thereby, it is possible to reduce the size while holding the terminals of the plurality of stages with different members.
In addition, by separately holding a plurality of terminals in the pedestal portion and the bus bar substrate, the step of fixing the connection terminal to the pedestal portion and the step of forming the bus bar substrate can be performed separately. Thus, it is easy to manufacture without being restricted by molding and terminal bending, and the connector can be easily multi-staged.

The following embodiments are preferable as the embodiments of the technology described in this specification.
The housing includes a fitting groove that fits into an end of the bus bar substrate.
In this way, the end of the bus bar substrate is fitted into the fitting groove, so that the bus bar substrate can be prevented from falling or tilting.

At least one of the housing and the bus bar substrate is formed with a guide portion that guides an assembly direction between the housing and the bus bar substrate.
If it does in this way, an assembly between a housing and a bus-bar board can be easily performed by a guide part.

One of the pedestal portion and the bus bar substrate is provided with a convex portion, and the other of the pedestal portion and the bus bar substrate is provided with a concave portion that fits the convex portion and positions the pedestal portion with respect to the bus bar substrate. ing.
If it does in this way, a convex part and a crevice fit and it can position a bus bar board and a base part relatively.

A movement restricting convex portion for restricting the movement of the flux toward the bus bar terminal is formed on the exterior portion.
If it does in this way, even if a bus-bar board | substrate is inclined after flux application | coating in a manufacturing process, it can suppress that a flux adheres to a bus-bar terminal.

The pedestal portion is placed on the surface of the bus bar substrate, the bus bar substrate has a through hole, and the connection terminal is inserted into the through hole and soldered.
In this way, even when the connecting terminal receives a force from the mating terminal when mated with the mating connector, the force to the connecting terminal is received by the pedestal portion and soldered to the location. Generation of cracks can be suppressed.

Suppose that it is an electrical junction box provided with the connector with a board | substrate and the case which accommodates the connector with a board | substrate.

According to the technique described in this specification, it is possible to reduce the size while holding the terminals of the plurality of stages with different members.

The top view which shows the electrical-connection box of Embodiment 1. Top view showing connector with board AA sectional view of FIG. BB sectional view of FIG. CC sectional view of FIG. Right side view showing connector with board DD sectional view of FIG. A plan view showing a bus bar substrate on which a terminal module and electronic components are mounted. EE sectional view of FIG. Front view showing a bus bar substrate on which a terminal module and electronic components are mounted Right side view showing the busbar board with the terminal module and electronic components installed Bottom view showing the busbar board with the terminal module and electronic components installed A plan view showing a bus bar substrate on which electronic components are mounted. Front view showing a busbar board with electronic components Right side view showing the busbar board with electronic components Top view showing the left terminal module Front view showing the left terminal module Top view showing the right terminal module Front view showing the right terminal module Right side view showing the right terminal module

<Embodiment 1>
The first embodiment will be described with reference to FIGS.
The electric junction box 10 (FIG. 1) of the present embodiment is provided in a power supply path between a power source such as a battery of a vehicle such as an electric vehicle or a hybrid vehicle and a load including an in-vehicle electrical component such as a lamp or a drive motor. For example, it can be used for a switching unit, a DC-DC converter, an inverter, and the like. In the following description, the X direction is the front, the Y direction is the left, and the Z direction is the upper.

(Electric junction box 10)
The electrical connection box 10 includes a connector 11 with a board and a case 70 that houses the connector 11 with a board.
(Connector with board 11)
As shown in FIG. 2, the board-attached connector 11 includes a connector 20 and a bus bar board 50 assembled to the connector 20.

(Connector 20)
The connector 20 includes a housing 21 made of synthetic resin, a plurality (10 in this embodiment) of connection terminals 30 penetrating the housing 21, and pedestals 40 A and 40 B that hold the connection terminals 30.

(Housing 21)
As shown in FIG. 7, the housing 21 has a plurality of (three in the present embodiment) fitting portions 21A to 21C that can be fitted to the mating connector side by side, and each of the fitting portions 21A to 21C is It has a hood-shaped (square tube-shaped) hood part 22 that covers the mating connector and a back wall part 24 that closes the hood part 22. As shown in FIG. 3, the hood part 22 is provided with a lock claw 23 for locking when mated with the mating connector. The rear wall portion 24 of the fitting portions 21 A and 21 C is provided on the upper side of the first through hole 25 and a plurality of first through holes 25 that penetrate the lower end side of the rear wall portion 24 back and forth and are arranged side by side. A plurality of second through holes 26 that penetrate the back wall portion 24 in the front-rear direction and are arranged in the left-right direction are formed in two steps at intervals in the vertical direction. Both the first through hole 25 and the second through hole 26 have a rectangular shape, and are formed in such a size that a slight gap is formed between the connection terminal 30 and the connection terminal 30. The rear end portions of the first through hole 25 and the second through hole 26 are enlarged in a taper shape, and the

terminals

25 and 31 are inserted into the first through hole 25 and the second through hole 26 when the

terminals

25 and 31 are inserted. To guide. Note that a one-step through hole 24C (FIG. 7) is formed in the back wall portion 24 of the fitting portion 21B. A die hole 28 for forming the lock claw 23 is formed in the upper portion of the back wall portion 24. As shown in FIGS. 4 and 5, the housing 21 has a guide insertion hole 27 (FIG. 4) through which a guide portion 58 protruding from the bus bar substrate 50 is inserted and an end portion of the bus bar substrate 50. Thus, a fitting groove 29 (FIG. 5) for suppressing the inclination of the bus bar substrate 50 with respect to the housing 21 is formed. The guide insertion hole 27 is formed so as to penetrate the back wall portion 24 connecting the adjacent fitting portions 21A to 21C, and projects to the front of the back wall portion 24. The fitting groove 29 is formed between the pair of sandwiching

protrusions

24A and 24B on the rear side of the back wall portion 24. When the bus bar substrate 50 is fitted into the fitting groove 29, the inclination of the bus bar substrate 50 is restricted. .

(Connection terminal 30)
The connection terminal 30 is made of a metal such as copper, copper alloy, aluminum, or aluminum alloy, and penetrates the

fitting portions

21A and 21C. As shown in FIG. 20, the connection terminal 30 is a rod-like terminal bent in an L shape. . Each connection terminal 30 is connected to the protruding portion 31 protruding into the hood portion 22, the rear of the protruding portion 31, the embedded portion 32 embedded and fixed in the pedestal portions 40 A and 40 B, and the rear of the embedded portion 32. And an extending portion 33 that extends rearward of the housing 21 and is bent in an L shape. The extending portion 33 is alternately different in length depending on the position of the connection terminal 30 in the left-right direction, and is bent at a right angle, and is connected to the bus bar substrate 50 by extending downward from the bent portion 34. Part 35.

(

Pedestal part

40A, 40B)
The

pedestal portions

40A and 40B are made of an insulating synthetic resin. As shown in FIGS. 16 and 18, the plurality of connection terminals 30 are connected in a strip shape, and the left and right end portions are connected to the connection terminals 30 at both ends. In addition, a concave portion 41 that opens in a rectangular shape that is long in the front-rear direction is formed so as to penetrate in a vertical direction in a portion that protrudes outward. As shown in FIGS. 17 and 19, the bottom surfaces of the pedestal portions 40 A and 40 B are formed with cutout portions 42 A that are cut out except for the left and right end portions. A protruding portion 42 B protruding on the end side is in contact with the upper surface of the bus bar substrate 50.

(Bus bar substrate 50)
As shown in FIG. 7, the bus bar substrate 50 has a rectangular shape, and is formed by covering a metal bus bar 51 with an exterior portion 56 made of an insulating synthetic resin in a close contact state. The bus bar 51 is formed by punching a metal such as copper or a copper alloy into a shape corresponding to a conductive path. In the bus bar 51, a plurality of through holes 54 arranged on the left and right are formed penetratingly at positions that are continuous with the conductive path. On the front end side of the bus bar 51, a plurality of bus bar terminals 52 inserted through the first through hole 25 and the through hole 24 C of the housing 21 are formed. The bus bar terminal 52 inserted into the first through hole 25 has a rectangular bar shape, and the bus bar terminal 52 inserted into the through hole 24C has a flat plate shape. At the front end portion of the exterior portion 56, a guide portion 58 that is inserted through the guide insertion hole 27 projects forward. In addition, as shown in FIG. 9, an electronic component 55 is mounted on the bus bar substrate 50. The electronic component 55 includes a switching element (for example, a relay such as a mechanical relay or FET (Field Effect Transistor)).

On the upper surface of the exterior portion 56, a convex portion 57 that fits into the concave portion 41 of the

pedestal portions

40A, 40B protrudes upward. The convex portion 57 has a rectangular shape that is long in the front-rear direction. Further, as shown in FIGS. 11 and 12, a movement restricting convex portion 60 that restricts the movement of the flux toward the bus bar terminal 52 is projected over the entire width of the front end portion of the exterior portion 56. The movement restricting convex portion 60 suppresses adhesion of the flux to the bus bar terminal 52 after application of the flux. The movement restricting convex portion 60 has a detour portion 60A that escapes from the sandwiching

projections

24A and 24B so as not to come into contact with the sandwiching

projections

24A and 24B when the housing 21 is assembled in a path according to the shape of the sandwiching

projections

24A and 24B. Is formed. The bypass portion 60 A is formed so as to bypass the front end of the exterior portion 56 backward.

(Case 70)
The case 70 is made of metal or synthetic resin, and as shown in FIG. 1, the case 70 has a rectangular parallelepiped box shape with an opening on the front side. The wall portion extending in the direction along the bus bar substrate 50 has a rectangular shape. A pair of left and right lock holes 71 are formed. The lock hole 71 is fitted into the fitting convex portion 22A protruding from the outer surface of the housing 21 so that the release from the state in which the case 70 is attached to the connector with board 11 is restricted. A positioning portion (not shown) for positioning the bus bar substrate 50 is formed inside the case 70. The positioning portion is, for example, a groove into which the edge of the bus bar substrate 50 is fitted, or a claw-like locking piece that can be flexibly deformed is locked to a hole edge of a locking hole formed in the bus bar substrate 50 or the like. be able to.

The assembly of the electrical junction box 10 will be described.

Terminal modules

43A and 43B are formed by insert molding in which a plurality of connection terminals 30 are arranged in a mold (FIGS. 16 and 18). Further, the lead terminal of the electronic component 55 is connected to the conductive path of the bus bar substrate 50 by reflow soldering (FIG. 13). Next, the flux is applied to the bus bar substrate 50, the board connecting portions 35 of the

terminal modules

43A and 43B are passed through the through holes 54 of the bus bar substrate 50, and the

pedestals

40A and 40B are placed on the bus bar substrate 50, and flow soldering is performed. (Fig. 8).

Next, the guide portion 58 of the bus bar substrate 50 is inserted into the guide insertion hole 27 of the housing 21. As a result, the bus bar terminal 52 and the connection terminal 30 are inserted into the through

holes

24C, 25, and 26 of the housing 21, and the housing 21 is assembled to the bus bar substrate 50 to form the connector 11 with the substrate (FIG. 2). At this time, the housing 21 may be fixed to the bus bar substrate 50 by fixing means such as screwing or locking with a locking piece. And if the connector 11 with a board | substrate is accommodated in the case 70, the electrical-connection box 10 will be formed (FIG. 1).

The operation and effect of this embodiment will be described.
The board-attached connector 11 includes a hood portion 22 and a back wall portion 24 that closes the hood portion 22. The first through hole 25 and the first through hole 25 that penetrate the back wall portion 24 are on the upper side or the lower side. A housing 21 in which a second through hole 26 penetrating the back wall portion 24 is formed on the side, a bus bar 51 made of metal corresponding to the shape of the conductive path, and an exterior portion 56 for holding the bus bar 51. The bus bar terminal 52 protruding in the direction along the plate surface 51 protrudes into the hood portion 22 while being inserted into the bus bar substrate 50 inserted into the first through hole 25 and the second through hole 26, and rearward of the housing 21. The side includes a connection terminal 30 connected to the bus bar substrate 50, and pedestals 40 A and 40 B that hold the connection terminal 30 and are stacked on the bus bar substrate 50.

According to the present embodiment, the bus bar terminal 52 is held by the exterior portion 56, and the connection terminal 30 disposed on the upper stage side or the lower stage side of the connection terminal 30 is held by the

pedestal portions

40A and 40B. Multiple stages of

terminals

30 and 52 can be held by different members. Further, since the bus bar terminal 52 protruding in the direction along the plate surface of the bus bar 51 in the bus bar substrate 50 is inserted into the first through hole 25 of the housing 21 to form the connector 20, the bus bar substrate 50 is orthogonal to the plate surface of the bus bar substrate 50. The direction dimension can be reduced. Moreover, even if the housing 21 and the bus bar substrate 50 are assembled in such a posture, the bus bar substrate 50 having higher strength than the printed circuit board on which the copper foil is printed on the insulating plate is used. Can be suppressed. Thereby, it is possible to reduce the size while holding the multiple stages of

terminals

30 and 52 with different members.

In addition, the step of fixing the connection terminal 30 to the

pedestal portions

40A and 40B and the step of forming the bus bar substrate 50 by separately holding the plurality of

terminals

30 and 52 by the

pedestal portions

40A and 40B and the bus bar substrate 50. Therefore, it is easy to manufacture without being limited by the mold, molding, and terminal bending, and the connector 20 can be easily multi-staged.

In addition, the housing 21 includes a fitting groove 29 that fits into an end portion of the bus bar substrate 50.
In this way, the end of the bus bar substrate 50 is fitted into the fitting groove 29, so that the bus bar substrate 50 can be prevented from being tilted or tilted.

Further, at least one of the housing 21 and the bus bar substrate 50 is formed with a guide portion 58 that guides the assembly direction between the housing 21 and the bus bar substrate 50.
In this way, the assembly between the housing 21 and the bus bar substrate 50 can be easily performed by the guide portion 58.

Further, one of the

pedestal portions

40A and 40B and the bus bar substrate 50 is provided with a convex portion 57, and the other of the

pedestal portions

40A and 40B and the bus bar substrate 50 is fitted to the convex portion 57 to be a pedestal portion 40A with respect to the bus bar substrate 50. , 40B is provided with a recess 41 for positioning.
In this way, the bus bar substrate 50 and the

pedestal portions

40A and 40B can be relatively positioned by fitting the convex portion 57 and the concave portion 41 together.

Further, the exterior portion 56 is formed with a movement restricting convex portion 60 that restricts the movement of the flux toward the bus bar terminal 52 side.
In this way, even if the bus bar substrate 50 is inclined after the flux application in the manufacturing process, it is possible to suppress the flux from adhering to the bus bar terminals 52.

The

pedestal portions

40A and 40B are placed on the surface of the bus bar substrate 50, the bus bar substrate 50 has a through hole 54, and the connection terminal 30 is inserted into the through hole 54 and soldered.
In this way, even when the connection terminal 30 receives a force from the mating terminal at the time of mating with the mating connector, the force to the connection terminal 30 is received by the

pedestal portions

40A and 40B, and soldering is performed. It can suppress that a crack arises in the attached location.

<Other embodiments>
The technology described in the present specification is not limited to the embodiments described with reference to the above description and the drawings. For example, the following embodiments are also included in the technical scope of the technology described in the present specification.
(1) Two or

more pedestals

40A and 40B may be stacked on the bus bar substrate 50.

(2) The exterior portion 56 is formed by insert molding the bus bar 51, but is not limited thereto. For example, the bus bar 51 may be held by the exterior part by covering the exterior part with a clearance with respect to the bus bar 51.

(3) Although the guide portion 58 protrudes from the bus bar substrate 50, the guide portion may protrude from the housing 21, and a guide insertion recess through which the guide portion is inserted may be provided on the bus bar substrate 50 side.

(4) Although the convex portion 57 is provided on the bus bar substrate 50, the convex portions 57 may be provided on the

pedestal portions

40A and 40B and fitted into the concave portions of the bus bar substrate 50 so that the

pedestal portions

40A and 40B are positioned. .

10: Electrical connection box 11: Connector with board 20: Connector 21: Housing 22: Hood portion 24: Back wall portion 25: First through hole 26: Second through hole 27: Guide insertion hole 30:

Connection terminals

40A, 40B: Pedestal part 50: Bus bar substrate 51: Bus bar 52: Bus bar terminal 54: Through hole 55: Electronic component 56: Exterior part 57: Convex part 58: Guide part 60: Movement restricting convex part 70: Case

Claims

It has a hood part and a back wall part that closes the hood part, and penetrates the back wall part on the upper stage side or the lower stage side with respect to the first through hole penetrating the back wall part and the first through hole. A housing formed with a second through hole;
A bus bar substrate having a bus bar made of metal corresponding to the shape of the conductive path and an exterior part that holds the bus bar, and a bus bar terminal protruding in a direction along the plate surface of the bus bar is inserted into the first through hole; ,
A connection terminal that protrudes into the hood portion while being inserted through the second through hole, and a rear side of the housing is connected to the bus bar substrate,
A board-attached connector comprising: a pedestal that holds the connection terminal and is superimposed on the bus bar board.
The said housing is a connector with a board | substrate of Claim 1 provided with the fitting groove fitted to the edge part of the said bus-bar board | substrate.
3. The board-attached connector according to claim 1, wherein at least one of the housing and the bus bar board is formed with a guide portion that guides an assembly direction between the housing and the bus bar board. .
One of the pedestal portion and the bus bar substrate is provided with a convex portion, and the other of the pedestal portion and the bus bar substrate is provided with a concave portion that fits the convex portion and positions the pedestal portion with respect to the bus bar substrate. The connector with a board | substrate as described in any one of Claims 1-3.
The connector with a board according to any one of claims 1 to 4, wherein a movement restricting convex portion that restricts movement of the flux toward the bus bar terminal is formed on the exterior portion.
The said base part is mounted on the surface of the said bus-bar board | substrate, the said bus-bar board | substrate has a through hole, The said connection terminal is penetrated by the said through-hole and soldered. The connector with a board | substrate as described in any one.
A connector with a board according to any one of claims 1 to 6,
An electrical junction box comprising a case for accommodating the connector with a board.