JP2006060970A - Electric connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric connection box which can deal with a variety of circuit patterns through combination of a printed board and a case for containing the printed board. <P>SOLUTION: In the electric connection box, connection pins 26 connected with conductors 22 are projected, at an interval, along the entire periphery of a square printed board 20, a case 11 having a square opening 13 corresponding to the printed board 20 in the center of the upper surface 12 and connector fitting portions 15 on the four circumferential walls is provided, L-shaped terminals 17 are fixed along the opening 13 at an interval identical to that of the connection pins 26, one side 17b of the L-shaped terminal 17 is projected along the periphery in the opening 13, a press contact slot 17c is formed from the projection end and the other side 17e is projected from the terminal hole 15b at the connector fitting portion 15, the printed board 20 is arranged to close the opening 13 and then the connection pin 26 is inserted into the press contact slot 17c of the L-shaped terminal 17 and connected therewith. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electrical connection box, and more particularly, to an electric connection box suitable for use in automobiles, in which various wires can be connected to a connector via a printed circuit board. .

  Conventionally, Japanese Patent Laid-Open No. 2001-25137 (Patent Document 1) provides an electrical connection box in which a connector is mounted on a printed circuit board and electric wires connected to the connector are connected to each other through a conductor of the printed circuit board. Has been.

  In the electrical junction box of Patent Document 1, as shown in FIGS. 12 (A) and 12 (B), an opening 1a is provided at the center of the assembly 1 using a bus bar as a circuit routing material, and a terminal 2 of the bus bar is connected to the circuit. While projecting from the periphery of 1a and attaching the connector 3 to the periphery, the control board 4 is mounted in the opening 1a. Terminal 5 projecting from the periphery of the control board 4 is connected to the terminal 2 of the bus bar of the assembly 1 by soldering, and the electric wire connected to the connector 3 is connected to the conductor of the control board 4 via the bus bar. It is said that.

In the electrical junction box disclosed in Patent Document 1, the connector 3 and the conductor of the control board 4 interpose the bus bar of the assembly 1 so that the configuration becomes complicated and the size is increased. Further, since the terminal 5 of the control board 4 and the terminal 2 of the bus bar are connected by soldering, there is a problem that a soldering process is required.
JP 2001-25137 A

  The present invention has been made in view of the above problems, and an object of the present invention is to enable connection of a printed board and a connector with simple and various circuit configurations.

In order to solve the above-mentioned problem, the present invention projects the connection pins connected to the conductors at intervals along the entire periphery of the printed circuit board in which the conductors are formed on the surface of the rectangular substrate.
A rectangular opening corresponding to the printed circuit board is provided at the center of the upper surface and / or the lower surface, and a case in which connector fitting portions are provided on the four peripheral walls is provided, and an L-shaped terminal is provided along the opening. With the same spacing as the connection pins,
One side portion of the L-shaped terminal protrudes along the peripheral edge within the opening, and a pressure contact slot is formed from the protruding end, while the other side portion protrudes from the terminal hole of the connector fitting portion. Let
An electrical connection box is provided, wherein the printed circuit board is disposed so as to close the opening, and the connection pin is inserted into and connected to a pressure contact slot of the L-shaped terminal.

According to the above configuration, when a connector connected to an electric wire terminal arranged in an automobile is fitted into a connector fitting portion provided on the peripheral wall of the case, the terminal in the connector connected to the electric wire protrudes into the connector fitting portion. And a terminal can be connected, and an electric wire can be connected through a circuit of a printed circuit board.
In this way, since the internal circuit connecting the electric wires is connected to the circuit of the printed circuit board only through the L-shaped terminal material without interposing the bus bar, the structure becomes simple, the number of parts is small, and The soldering process between the terminal of the bus bar connected to the connector and the terminal on the board side as disclosed in Patent Document 1 is eliminated, and the manufacturing can be performed at low cost.

In addition, since one side portion of the terminal provided with the pressure contact slot is arranged along the periphery of the opening of the case, and the connection pin is connected to the conductor at the same pitch as the terminal along the periphery of the printed circuit board, When the printed circuit board is arranged so as to close the opening, all the terminals in the case and the connection pins of the printed circuit board can be connected together, and the connection between the printed circuit board and the terminals in the case can be facilitated.
Furthermore, when the electrical junction box of the present invention is used for vehicles of different vehicle types and grades, or when a circuit change occurs, only the printed circuit board needs to be changed. And a terminal attached to the case can be shared.

It is preferable that the printed circuit board is attached with a cover on the side opposite to the protruding side of the connection pin.
Thereby, the conductor of the printed circuit board can be protected, and if the peripheral shape of the cover is the same as the shape of the opening provided in the cover, the opening of the case can be completely closed by the cover.

  Two printed boards are provided, and openings are provided on both upper and lower sides of the case. The L-shaped terminals are respectively attached along the upper and lower openings, and one side portion of the upper and lower L-shaped terminals is attached to each of the upper and lower sides. While connecting with the connection pin of a printed circuit board, the other side part is made to protrude from the terminal hole of the said connector fitting part.

According to the said structure, since two printed circuit boards are used, it can respond to a more complicated circuit pattern.
When only one printed circuit board is used, if one of the upper and lower surfaces is covered with a cover and closed, the case is used with two electrical connection boxes that use only one printed circuit board. Can be shared with an electrical junction box.

  In addition, the connection pins to be connected to the conductors of the printed circuit board project from both sides of the circuit board to the upper and lower sides, while the case is stacked vertically with the printed circuit board sandwiched therebetween, and the L-shaped terminals of the upper and lower cases The connection pins protruding from both the upper and lower surfaces of the printed circuit board may be inserted and connected to the opposing pressure contact slots.

According to the said structure, it becomes possible to respond | correspond to a more complicated circuit pattern by laminating | stacking the said case up and down, and more electric wires can be connected by various circuit structures using the same case.
That is, when there are 4 or less connectors connected to the wires, each connector can be fitted to the connector fitting portion of one case to connect the wires, but there are 5 connectors connected to the wires. When it becomes above, all these connectors cannot be fitted in the connector fitting part of one case. Therefore, by stacking the same case up and down and connecting the L-shaped terminals in these stacked cases to connection pins connected to the conductors of the printed circuit board, more connector fitting portions are provided, and there are five or more connectors. Also in this case, all the connectors can be fitted to the connector fitting portion so as to be jointable. At this time, since the stacked cases are the same case, the case can be shared between the case where the case is used in one stage and the case where the cases are stacked and used in multiple stages.
Note that the number of cases stacked is not limited to two, and the case and the printed circuit board may be alternately stacked to have three or more layers.

The connection pins include three types of connection pins: a first connection pin that protrudes upward and downward from the substrate, a second connection pin that protrudes upward, and a third connection pin that protrudes downward.
According to the above configuration, the first connection pin causes the conductor of the printed circuit board and the L-shaped terminals in the upper and lower cases, the second connection pin allows the conductor of the printed circuit board and the L-shaped terminal in the upper case, and the third connection pin. The conductor of the printed circuit board and the L-shaped terminal in the lower case can be connected to each other, and various circuit patterns can be formed using required connection pins.

The connection pin to be connected to the conductor of the printed circuit board is connected by soldering by inserting a connection pin into a terminal hole formed in the conductor, or press-fit and connected to the terminal hole as a connection pin as a press-fit terminal. .
According to the said structure, a connection pin can be easily connected to the conductor of a printed circuit board by soldering or press-fit connection.

  A conductor of the printed circuit board is formed along a circuit pattern, or formed in a cross shape, and a circuit pattern is formed by cutting out a required portion, and electrical components and / or electronic components are mounted on the printed circuit board. .

If a circuit pattern is formed by forming conductors of a printed circuit board in a cross shape and cutting out necessary portions such as intersections of the conductors, the printed circuit board can be shared by various circuit patterns.
In addition, since electrical components and / or electronic components are mounted on the printed board, not only the electric wires can be jointed, but also a function as a switch by a relay can be given to the printed board.

  As described above, according to the present invention, when a connector connected to an electric wire terminal arranged in an automobile is fitted to a connector fitting portion provided on a peripheral wall of the case, the terminal in the connector connected to the electric wire and the connector are fitted. The terminal protruding into the joint is connected, and the electric wire is jointed via the conductor of the printed circuit board. Since a printed circuit board is used without using a bus bar made of a conductive metal plate as an internal circuit for joining electric wires, it is possible to cope with a complicated circuit pattern and to reduce the size of the electrical junction box.

In addition, since one side portion of the terminal provided with the pressure contact slot is arranged along the periphery of the opening of the case, and the connection pin is connected to the conductor at the same pitch as the terminal along the periphery of the printed circuit board, When the printed circuit board is arranged so as to close the opening, all the terminals in the case and the connection pins of the printed circuit board can be connected together, and the connection between the printed circuit board and the terminals in the case can be facilitated.
Furthermore, various circuit patterns can be formed by changing only the printed circuit board, so that connection pins and cases can be shared with different types and grades of vehicles, and the circuit can be changed flexibly. Can respond.

Embodiments of the present invention will be described with reference to the drawings.
1 to 7 show a first embodiment of the present invention. An electrical junction box 10 includes a printed circuit board 20 in a case 11, and a plurality of electric wires w are jointed through the printed circuit board 20. .

  The case 11 is a rectangular parallelepiped box. A rectangular opening 13 is provided on the upper surface 12 and connector fitting portions 15 are provided on the outer surfaces of the four peripheral walls 14 respectively. Terminal holes 15b are arranged in a row in the bottom wall 15a of the connector fitting portion 15 with a certain pitch. In the present embodiment, the lower surface 16 of the case 11 is a closed surface.

  A plurality of terminals 17 are attached in the case 11. As shown in FIG. 3, the terminal 17 has an L shape bent at a right angle at a bent portion 17a at the center in the length direction, and is cut out from the center of the tip of one side portion 17b to the bent portion 17a to form a pressure contact slot 17c. Further, a contact portion 17d is provided so as to protrude from both inner surfaces of the pressure contact slot 17c. The other side portion 17e is notched from the bent portion 17a, is formed with a locking hole 17f continuous with the pressure contact slot 17c, and has a male tab shape at the tip.

  The other side portion 17e of the terminal 17 is passed through a terminal hole 15b provided in the bottom wall 15a of the connector fitting portion 15 of the case 11, and is projected into the connector fitting portion 15 as shown in FIG. On the other hand, as shown in FIG. 2A, the one side portion 17b provided with the pressure contact slot 17c is projected upward along the peripheral edge of the opening 13 of the upper surface 12 of the case 11. The terminal 17 may be provided integrally with the case 11 by molding.

  As shown in FIG. 4, the printed circuit board 20 accommodated in the case 11 has a conductor 22 a extending in the left-right lateral direction X on one surface side of the rectangular insulating substrate 21 with a certain interval in the vertical direction Y. In addition, the conductor 22b extending in the vertical direction Y is formed in a cross shape by forming the conductor 22b in the horizontal direction X with a certain interval. Further, through holes that communicate with the insulating substrate 21 and the conductors 22 are provided along the entire periphery of the printed circuit board 20, and terminal holes 23 through which the connection pins 26 penetrate are formed. The pitch of the terminal holes 23 is the same as that of the terminals 17 attached in the case 11, and when connecting pins 26, which will be described later, are inserted through the terminal holes 23, the connecting pins 26 and the terminals 17 attached to the case 11 are installed. Are arranged at the same pitch.

  As shown in FIG. 4B, the printed circuit board 20 forms a required circuit pattern by cutting out a required intersection 22c where the conductors 22a and 22b cross. Further, as shown in FIG. 4C, electrical parts such as a board relay 24 and electronic parts such as a semiconductor relay 25 are mounted on a required portion of the conductor 22. In addition, you may cut out the conductor of required places other than an intersection part.

The connection pin 26 that penetrates through the terminal hole 23 of the printed circuit board 20 and is soldered to the conductor 22 has a locking claw 26a projecting in a direction perpendicular to the axial direction at the insertion-side end.
The connection pins 26 are held through the terminal holes 23 provided along the entire periphery of the printed circuit board 20, and the connection pins 26 are soldered to the conductors 22. The connection pin 26 is
In a state of being soldered to the conductor 22 of the printed circuit board 20, as shown in FIG. 5, a locking claw 26 a provided at the distal end on the insertion side is projected toward the outer peripheral side of the printed circuit board 20.

  The printed circuit board 20 is attached with a cover 27 covering the upper surface of the printed circuit board 20 on which the conductor 22 is formed. The cover 27 includes an upper wall 27a having the same shape as the opening 13 provided on the upper surface of the case 11, and a peripheral wall 27b projecting downward along the periphery from the lower surface of the upper wall 27a. The front end of the connection pin 26 attached to the printed circuit board 20 protrudes from the lower surface opening. Further, a horizontal locking groove 27 c is provided around the inner surface of the peripheral wall 27 a of the cover 27, and the peripheral edge portion of the printed circuit board 20 is inserted and locked in the locking groove 27 c to fix the cover 27 to the printed circuit board 20. ing.

  The printed circuit board 20 with the cover 27 attached is inserted into the case 11 through the opening 13 of the case 11, and the connection pins 26 attached to the printed circuit board 20 are inserted into the pressure contact slots 17 c of the terminals 17 attached to the case 11. Connected. When the printed circuit board 20 is inserted into the case 11 to a predetermined position, as shown in FIGS. 6 and 7, the pair of contact portions 17 d of the terminal 17 are connected in pressure contact with the connection pin 26 and the connection pin 26 is engaged. The pawl 26 a is locked by being locked to the back surface of the other side portion 17 e of the terminal 17. At this time, the opening 13 of the case 11 is closed by the upper wall 27 a of the cover 27 attached to the printed circuit board 20.

  A connector 30 is fitted to the connector fitting portion 15 provided on the peripheral wall 14 of the case 11, and the female terminal 31 of the electric wire w terminal accommodated in the terminal accommodating portion 30 a of the connector 30 and the connector fitting portion 15 The other side portion 17e of the terminal 17 protruding in the direction is connected. Thereby, the plurality of electric wires w are jointed via the terminals 17, the connection pins 26, and the conductors 22 of the printed circuit board 20.

According to the above configuration, since the printed circuit board 20 is used without using a bus bar made of a conductive metal plate as an internal circuit for jointing the electric wires w, it is possible to deal with a complicated circuit pattern and an electrical junction box. 10 can be reduced in size.
In addition, one side portion 17b of the terminal 17 is disposed along the periphery of the opening 13 of the case 11, and the connection pins 26 are connected to the conductor 22 at the same pitch as the terminal 17 along the periphery of the printed circuit board 20. If the printed circuit board 20 is arranged so as to close the opening 13, all of the terminals 17 in the case 11 and the connection pins 26 of the printed circuit board 20 can be connected together.
Further, when the electric junction box 10 of the present invention is used for a vehicle of a different vehicle type or grade, or when a circuit change occurs, only the printed circuit board 20 may be changed, and the connection pins 26 attached to the printed circuit board 20 are used. The case 11 and the terminal 17 attached to the case 11 can be shared.

8 to 10 show a second embodiment of the present invention.
In this embodiment, an opening 13 is provided on the upper surface 12 of the case 11, and an opening 18 is also provided on the lower surface 16, and the printed circuit board 20 is inserted into the case 11 from both the upper and lower sides.

The bottom wall 15a of the connector fitting portion 15 of the case 11 is provided with terminal holes 15b in two upper and lower stages, as shown in FIG. 8, and the terminal 17A attached to the upper terminal hole 15b-1 has one side portion. The terminal 17B attached to the lower terminal hole 15b-2 has one side 17b protruding downward while projecting 17b upward.
A connection pin 26A attached to the printed circuit board 20A to be inserted into the case 11 from above is inserted into the pressure contact slot 17c of the terminal 17A to connect the terminal 17A and the connection pin 26A, while the pressure contact slot 17c of the terminal 17B. The connection pin 26B attached to the printed circuit board 20B to be inserted into the case 11 from below is inserted, and the terminal 17B and the connection pin 26B are connected.
Further, the connector 30 is provided with a terminal accommodating portion 30a in two upper and lower stages corresponding to the terminals 17 attached in two upper and lower stages.

Unlike the first embodiment, the printed circuit board 20 of the present embodiment has conductors 22 formed in advance along a circuit pattern as shown in FIG. 9, and is a dedicated printed circuit board for a specific circuit.
Further, as shown in FIG. 10, the connection pins 26 are press-fit and connected to the printed circuit board 20 as press-fit terminals. That is, copper plating is applied from the entire inner peripheral surface of the terminal hole 23 of the printed circuit board 20 to the surface of the printed circuit board 20, and the conductive layer 28 is provided by performing tin plating or solder plating on the surface of the copper plating. 28 is joined to the conductor 22. On the other hand, the connection pin 26 is provided with a press-fit portion 26b which is struck out and made thin. The press-fit portion 26 is press-fitted into the terminal hole 23 of the printed circuit board 20 and connected to the conductor 22.

According to the said structure, since the two printed circuit boards 20 are accommodated in one case 11, while being able to respond to a more complicated circuit pattern, more electric wires w can be joined.
Further, since the connection pin 26 is a press-fit terminal, the connection pin 26 can be easily connected by being press-fitted into the terminal hole 23 of the printed circuit board 20.
In addition, since another structure and an effect are the same as that of 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

FIG. 11 shows a third embodiment of the present invention.
In the present embodiment, the cases 11A and 11B are stacked one above the other with the printed circuit board 20 in between.
The stacked cases 11A and 11B are the same as those in the first embodiment, and the lower case 11A is arranged so that the opening 13 is formed on the upper surface 12, while the upper case 11B is arranged upside down. Thus, the opening 13 is disposed in the lower surface 16. Accordingly, the terminal 17A attached to the lower case 11A has one side 17b protruding upward, while the terminal 17B attached to the upper case 11B arranged upside down has the one side 17b directed downward. Protruding.

Three types of connection pins are attached to the printed circuit board 20.
The first connection pin 26A is long, and the center in the axial direction is soldered to the conductor 22 of the printed circuit board 20 so as to protrude from the printed circuit board 20 to both the upper and lower sides. The first connection pin 26 </ b> A is provided with a locking claw 26 a only at one end so that the first connection pin 26 </ b> A can penetrate the terminal hole 23 of the printed circuit board 20.
The second connection pins 26B are the same connection pins as in the first embodiment, and protrude upward from the printed circuit board 20.
The third connection pin 26 </ b> C is the same connection pin as in the first embodiment, but protrudes downward from the printed circuit board 20.

  When the printed circuit board 20 is sandwiched between the cases 11A and 11B and the printed circuit board 20 is disposed in the openings 13 of the cases 11A and 11B as described above, the lower end side of the first connection pin 26A is attached to the lower case 11A. In addition to being connected to the terminal 17A, the upper end side is connected to a terminal 17B attached to the upper case 11B. At the same time, the second connection pin 26B is connected to the terminal 17B of the case 11B, while the third connection pin 26C is connected to the terminal 17A of the case 11A.

According to the said structure, it becomes possible to respond | correspond to a more complicated circuit pattern by laminating | stacking the case 11 up and down, and more electric wires w can be jointed using the same case 11. FIG.
In addition, it may replace with the case of 1st Embodiment and may use the case which provided the opening in upper and lower surfaces of 2nd Embodiment.
Moreover, the case where it laminates | stacks is not restricted to 2 steps | paragraphs, 3 steps or more may be sufficient.
Furthermore, in the present embodiment, one printed board is sandwiched between cases, but a plurality of boards may be stacked. Thereby, it is possible to cope with more complicated circuit patterns.
Since other configurations and operational effects are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

It is a disassembled perspective view of the electrical junction box of 1st Embodiment of this invention. A case is shown, (A) is a top view, (B) is an AA sectional view. It is a perspective view of the terminal attached to a case. (A) is a plan view of a printed circuit board before cutting out unnecessary conductors, (B) is a plan view of the printed circuit board after cutting out unnecessary conductors, and (C) is a printed circuit board on which electrical components and electronic components are mounted. FIG. It is sectional drawing of the printed circuit board which attached the cover. It is sectional drawing which shows the state which connected the connector to the electrical junction box. It is a perspective view which shows the state which connected the terminal and the connection pin. It is sectional drawing of the electrical-connection box of 2nd Embodiment. It is a top view of a printed circuit board. It is a principal part expanded sectional view which shows the state which connected the connection pin to the conductor of a printed circuit board. It is sectional drawing of the electrical-connection box of 3rd Embodiment. (A) (B) is drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electrical connection box 11 Case 13 Opening 15 Connector fitting part 17 Terminal 17b One side part 17c Press contact slot 17d Contact part 17e Other side part 17f Locking hole 20 Printed circuit board 22 Conductor 26 Connection pin 26a Locking claw 30 Connector w Electric wire

Claims (6)

While projecting the connection pins connected to the conductor at intervals along the entire periphery of the printed circuit board in which the conductor is formed on the surface of the rectangular substrate,
A rectangular opening corresponding to the printed circuit board is provided at the center of the upper surface and / or the lower surface, and a case in which connector fitting portions are provided on the four peripheral walls is provided, and an L-shaped terminal is provided along the opening. With the same spacing as the connection pins,
One side portion of the L-shaped terminal protrudes along the peripheral edge within the opening, and a pressure contact slot is formed from the protruding end, while the other side portion protrudes from the terminal hole of the connector fitting portion. Let
An electrical junction box, wherein the printed circuit board is arranged so as to close the opening, and the connection pin is inserted into and connected to a pressure contact slot of the L-shaped terminal.   Two printed boards are provided, and openings are provided on both upper and lower sides of the case. The L-shaped terminals are respectively attached along the upper and lower openings, and one side portion of the upper and lower L-shaped terminals is attached to each of the upper and lower sides. The electrical connection box according to claim 1, wherein the electrical connection box is connected to a connection pin of the printed circuit board and the other side portion is protruded from a terminal hole of the connector fitting portion.   The connection pins to be connected to the conductors of the printed circuit board project from the both sides of the circuit board to the upper and lower sides, while the case is stacked up and down across the printed circuit board, and the L-shaped terminals of the upper and lower cases are opposed to each other. The electrical connection box according to claim 1, wherein the connection pins projecting from the upper and lower surfaces of the printed circuit board are inserted into and connected to the press contact slot.   4. The electrical connection according to claim 3, wherein the connection pins include three types of connection pins: a first connection pin that protrudes upward and downward from the substrate, a second connection pin that protrudes upward, and a third connection pin that protrudes downward. box.   The connection pin to be connected to the conductor of the printed circuit board is connected by soldering by connecting a connection pin into a terminal hole formed in the conductor, or press-fit and connected to the terminal hole as a connection pin as a press-fit terminal. The electrical junction box according to any one of claims 1 to 4.   The printed circuit board conductor is formed along the circuit pattern, or formed in a cross shape, and a circuit pattern is formed by cutting a required portion, and electrical components and / or electronic components are mounted on the printed circuit board. The electrical junction box according to any one of claims 1 to 5.

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