JP2000173682A - Connection terminal mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection terminal mounting structure improving mounting workability of a connection terminal to a printed circuit board. SOLUTION: Bus bars 12 are arranged on a laminated base board 11. In the respective bus bars 12, five male tabs 13 bent upward are protruded. In a printed circuit board 21, oblong holes 22, through which the respective male tabs 13 can be passed, are perforated in the positions matching the respective male tabs 13. In the vicinities of the oblong holes 22, five through-holes 23 are bored. A conductive layer is formed on the back face of the printed circuit board 21. A terminal housing holding member 31 is provided with a terminal housing part 32 and a lid part 33. In the terminal housing part 32, five opening parts 34 opened upward are arranged. Each of connection terminals 41 is a female-type terminal, which can be fitted around the bus bar tab 13. On the side face of each terminal 41, a single insertion leg piece 42 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection terminal mounting structure mounted on a printed wiring board inside an electric connection box mounted on a vehicle, for example.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional connection terminal mounting structure. That is, as shown in the figure, the conductive layer 52 is formed on one side surface of the printed wiring board 51. The printed wiring board 51 is provided with two through holes 53, and furthermore, the two through holes 53 are provided.
A through-hole 54 is provided between the male and female bus bars, not shown, for passing a male bus bar tab 55.

On the other hand, a connection terminal 56 has a female tab 57 formed in a substantially rectangular cylindrical shape so that a bus bar male tab 55 is fitted therein, and two insertion leg pieces 58 protruding from the female tab 57. Consists of The connection terminal 56 is connected to the insertion hole 53.
Is inserted on the printed wiring board 51. The distal end portion of the insertion leg piece 58 protruding from the conductive layer 52 side of the printed wiring board 51 is soldered. Thus, the connection terminal 56 is fixed on the printed wiring board 51.

A male bus bar tab 55 penetrating from the through hole 54 is fitted into the female tab 57 of the connection terminal 56 fixed on the printed wiring board 51 in this manner, and Bus bar (male tab 5
5) is connected.

[0005]

However, in such a conventional connection terminal mounting structure, the connection terminals 56 are not provided.
When a plurality of the terminals 56 are mounted on the printed wiring board 51, the terminals 56 need to be placed one by one at predetermined positions on the printed wiring board 51. Moreover, since each terminal 56 is placed on the printed wiring board 51 independently one by one, there is a possibility that the terminal 56 will not be held at a predetermined position before the soldering step is performed and will fall off.

Therefore, it is necessary to temporarily fix each terminal 56 using a jig or the like until the soldering is completed. In this case, the number of steps for temporarily fixing each terminal 56 to the jig and the number of steps for removing the jig increase, and there is a disadvantage such as a decrease in productivity.

[0007] Further, when such temporary fixing of the connection terminals 56 is not performed, each connection terminal 56 needs to be mounted on the printed wiring board 51 immediately before the soldering step.
That is, the degree of freedom in the manufacturing process is impaired.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a connection terminal mounting structure capable of improving the mounting properties of the connection terminals to a printed wiring board. .

[0009]

According to a first aspect of the present invention, there is provided a printed wiring board having a plurality of insertion holes, and an insertion leg piece inserted into the insertion hole. A plurality of connection terminals are provided, and the conductive layer of the printed wiring board and the insertion leg pieces are soldered in a state where the insertion leg pieces are inserted into the insertion holes, and the connection terminals are fixed to the printed wiring board. In the connection terminal mounting structure, the connection terminals are mounted on the printed wiring board using a terminal holding member that holds the plurality of connection terminals in a predetermined positional relationship with each other. I do.

According to a second aspect of the present invention, in the connection terminal mounting structure according to the first aspect, the terminal holding member includes a terminal accommodating portion accommodating the plurality of connection terminals, and each of the connection terminals. And a holding means for holding the connection terminal in the terminal receiving portion, wherein the connection terminal is attached to the printed wiring board in a state of being received in the terminal receiving portion.

According to a third aspect of the present invention, in the connection terminal mounting structure according to the first or second aspect, the connection terminal has only one insertion leg piece. .

The "action" of the present invention will be described below. According to the first aspect of the present invention, the plurality of connection terminals are held at predetermined positions by the terminal holding member, and each terminal is attached to the printed wiring board in that state. For this reason, by mounting the terminal holding member on the printed wiring board, it is possible to collectively mount the connection terminals at predetermined positions on the printed wiring board at once. That is, when attaching a plurality of connection terminals to the printed wiring board, it is not necessary to place each terminal one by one. Therefore, the attachment of the connection terminal to the printed wiring board is improved.

According to the second aspect of the present invention, when a plurality of connecting terminals are mounted on the printed wiring board, the mounting is performed while each terminal is accommodated in the terminal accommodating portion of the accommodating holding member. . For this reason, in addition to the effect of claim 1, by housing the connection terminal in the terminal housing portion,
The terminal can be prevented from coming into contact with another conductive member.

According to a third aspect of the present invention, each connection terminal has only one insertion leg piece. That is, there is only one soldering location per terminal. In the conventional connection terminal mounting structure described above, since each connection terminal is independently mounted on the printed wiring board, if only one insertion leg piece is used,
It is difficult to place the terminals on the printed wiring board in a stable state. Therefore, the connection terminal needs to have at least two insertion leg pieces so that the terminal does not fall off. On the other hand, in the present invention, since the terminal is held by the terminal holding member, the terminal can be stably mounted on the printed wiring board even with one insertion leg piece. Therefore, productivity can be improved while preventing poor connection to the printed wiring board.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. As shown in FIG. 1, the electric circuit structure 1 includes a laminated board 11, a printed wiring board 21, and a terminal housing / holding member 3 as a terminal holding member.
1 and a connection terminal 41.

The laminated substrate 11 is formed by stacking three substantially rectangular insulating substrates IP1 to IP3.
A plurality (five) of bus bars 12 are laid between the insulating substrates IP1 to IP3 and on the surface and the like. Each bus bar 12 is formed with a male tab 13 that is bent upward and protrudes.

The printed wiring board 21 has a substantially rectangular shape and is arranged on the laminated substrate 11. One elongated hole 22 through which the male tabs 13 can be inserted collectively is provided at a position corresponding to each of the male tabs 13 on the printed wiring board 21. In the vicinity of the long hole 22, a plurality (five) of through holes 23 are formed in a straight line at equal intervals. As shown in FIG. 3, a conductive layer 24 is formed on the back surface of the printed wiring board 21, and a similar through hole 25 is provided at a position corresponding to the through hole 23.

Terminal accommodating and holding member 3 as terminal holding member
1 includes a terminal receiving portion 32 having a substantially rectangular parallelepiped shape, and a lid portion 33 that covers the terminal receiving portion 32. The terminal accommodating portion 32 and the lid portion 33 are formed of, for example, an insulating material such as an injection-molded synthetic resin. Terminal housing 3
The height of 2 is set substantially equal to the height of the connection terminal 41. Further, the lid 33 is formed in a substantially rectangular shape capable of covering the entire upper surface of the terminal accommodating portion 32.

The terminal accommodating portion 32 is provided with a plurality (five) of opening portions 34 opening upward. Each of the openings 34 has a rectangular cross section, and has a size capable of individually storing the connection terminals 41 one by one.

Each connection terminal 41 is a female terminal that can be fitted to the bus bar male tab 13. One insertion leg piece 42 is formed on the side surface of each terminal 41. As shown in FIG. 3, each of the insertion leg pieces 42 is
A first portion 42a extending laterally from the side surface of
A second portion 42b extending downward from the tip of the first portion 42a. Each insert leg piece 4
2 is formed narrower than the width of each terminal 41;
Is formed to have a length protruding from the lower end of the. Further, as shown in FIG. 3, each terminal 41 has a fitting hole 43 for fitting with the male tab 13. A pair of flexible pieces 44 are formed at the lower end of the fitting hole 43.

On the other hand, as shown in FIG.
In the bottom wall 32a, a square hole 35 engageable with each connection terminal 41 and a hole 36 through which an insertion leg piece 42 of the terminal 41 can be inserted are individually provided for each opening 34. ing. Therefore, when each connection terminal 41 is accommodated in each opening 34, each insertion leg 42 is inserted into each hole 36, and the lower end of each terminal 41 is engaged with each square hole 35. .
After each of the connection terminals 41 is housed, the lid 33 is covered from above the terminal housing 32. An engagement means (not shown) is formed in the terminal accommodating portion 32 and the lid portion 33,
The lid 33 is fixed to the terminal accommodating portion 32 by these engagements. For this reason, each connection terminal 41 is connected to the terminal housing 3.
2 will be housed and held. That is, the lid 33
Functions as holding means for the connection terminal 41.

The terminal accommodating and holding member 31 accommodating and holding each of the connection terminals 41 as described above is placed on the printed wiring board 21. At this time, as shown in FIG.
2 is a through-hole 23 and a conductive layer 24 of the printed wiring board 21.
Is inserted through the through hole 25. Further, the terminal accommodating and holding member 31 is placed on the printed wiring board 21 with the square holes 35 of the terminal accommodating portions 32 corresponding to the elongated holes 22 of the printed wiring board 21. Then, the insertion leg 42 protruding from the back surface of the printed wiring board 21 and the conductive layer 24 are welded by the solder 45. That is, the insertion leg 42 is soldered to the conductive layer 24. Thereby, the connection terminal 41 and the conductive layer 2
4 and the terminals 41 are fixed on the printed wiring board 21 together with the terminal accommodating and holding members 31. In other words, the terminal accommodating and holding member 31 is not directly fixed to the printed wiring board 21, but is indirectly fixed by fixing the connection terminals 41 to the printed wiring board 21.

On the other hand, when the terminal accommodating and holding member 31 is placed on the printed wiring board 21, the connection terminals 41
Has a lower end in contact with the printed wiring board 21 and an upper end
Abut. Moreover, the terminal 41 is engaged with the square hole 35. Therefore, in this state, each terminal 41
Are mounted on the printed wiring board 21 without rattling. Therefore, it is possible to solder to the conductive layer 24 in a state where the insertion leg pieces 42 are securely positioned.

Subsequently, the printed wiring board 21 and the laminated board 11 are assembled. Here, as shown in FIG. 3, each of the male tabs 13 is
2 is inserted from below. And each male tab 13
Is inserted into the fitting hole 43 of each connection terminal 41. At this time, the male tabs 13 are sandwiched and held by the flexible pieces 44. That is, each male tab 13 is connected to each terminal 41.
Insert. Accordingly, each male tab 13 and each corresponding connection terminal 41 are electrically connected. That is, conduction between each male tab 13 and the conductive layer 24 is established.

The electric circuit structure 1 assembled as described above is housed in a box (not shown), and is incorporated into a vehicle or the like as an electric connection box. Therefore, according to the present embodiment, the following effects can be obtained.

(1) Each terminal 41 for connection is stored in advance in each opening 34 of the terminal receiving portion 32, so that the terminal receiving portion 32 is placed on the printed wiring board 21 so that each terminal 41 is placed. Can be collectively mounted on the printed wiring board 21 at one time. That is, it is not necessary to individually mount the connection terminals 41 on the printed wiring board 21 one by one. Moreover, since each terminal 41 is housed and held in the terminal housing and holding member 31, the terminal 41 does not fall off by the step of soldering to the conductive layer 24. Therefore, each terminal 41 can be placed on the printed wiring board 21 even immediately before the soldering step. Therefore, the attachment property of the connection terminal 41 to the printed wiring board 21 can be improved.

(2) Each connection terminal 41 is connected to the terminal housing 3
2 housed. For this reason, each terminal 41 can be prevented from coming into contact with another conductive member. (3) Since only one insertion leg piece 42 is formed in each connection terminal 41, only one soldering point is attached to the conductive layer 24. Therefore, soldering can be simplified. Moreover, since each terminal 41 is accommodated and held by the terminal accommodating and holding member 31, even if only one insertion leg piece 42 is provided, the terminal 41 can be stably mounted on the printed wiring board 21. Therefore, each terminal 41 does not fall off by the soldering step. As a result, each terminal 41 with respect to the printed wiring board 21
The productivity can be improved while preventing the poor connection.

(4) Each connection terminal 41 in each opening 34
Is accommodated, the terminal accommodating portion 32 is covered with the lid portion 33. Since the terminal accommodating portion 32 and the lid portion 33 are engaged,
Each terminal 41 does not come out of the terminal housing 32. Therefore, each terminal 41 can be reliably held by the terminal housing and holding member 31. That is, since there is no need to provide an engagement piece or the like for holding each terminal 41 in the terminal accommodating portion 32, the configuration of the terminal accommodating and holding member 31 can be simplified.

(5) Each connection terminal 41 is individually accommodated in the terminal accommodation holding member 31. For this reason, conduction between the adjacent terminals 41 can be reliably prevented. (6) The connection terminal 4 is provided on the bottom wall 32a of the terminal accommodating portion 32.
A square hole 35 that engages with 1 is provided through. Therefore, by engaging the lower end of the connection terminal 41 with the square hole 35, the movement of the terminal 41 in the opening 34 can be restricted. Therefore, when placing the terminal accommodating and holding member 31 accommodating each terminal 41 on the printed wiring board 21, the insertion leg pieces 42 of each terminal 41 can be easily inserted into the corresponding holes 36. .

(7) When the terminal accommodating and holding member 31 is placed on the printed wiring board 21, the connection terminals 41
Has a lower end in contact with the printed wiring board 21 and an upper end
Abut. Moreover, the terminal 41 is engaged with the square hole 35. Therefore, in this state, each terminal 41
Are mounted on the printed wiring board 21 without rattling. Therefore, it is possible to solder to the conductive layer 24 in a state where the insertion leg pieces 42 are securely positioned.

The embodiment of the present invention may be modified as follows. In the above-described embodiment, the terminal housing / holding member 31 including the terminal housing 32 and the lid 33 as holding means is used as the terminal holding member. This is shown in FIG.
The terminal holding member 37 has a ladder shape having a plurality of terminal receiving holes 38 engageable with the lower end of each connection terminal 41. That is, as the terminal holding member, only the function of holding the connection terminal 41 is provided, and the function of housing the connection terminal 41 is omitted.

By doing so, each terminal 41 can be held by engaging each terminal 41 with each terminal receiving hole 38. Then, by mounting the terminal holding member 37 on the printed wiring board 21, each terminal 41 can be mounted on the printed wiring board 21. In addition, the configuration of the terminal holding member 37 is simplified, and a rise in manufacturing cost can be suppressed.

In the above embodiment, each connection terminal 41
Used is one having only one insertion leg piece 42. A terminal having two or more insertion leg pieces may be used as the connection terminal.

In the above embodiment, the lid 33 is used as the holding means for holding the connection terminal 41. However, the present invention is not limited to this. And this may be used as the holding means.

In the terminal accommodating and holding member 31, the square hole 35 and the through hole 3 provided in the bottom wall 32a of the terminal accommodating portion 32
6, and the lid 33 are omitted. This is effective when the connection terminals 41 are attached from below the printed wiring board 21 and the insertion leg pieces 42 and the conductive layer 24 formed on the surface of the printed wiring board 21 are soldered. That is, in this case, the terminals 41 are accommodated in the respective openings 34 with the terminals 41 being inverted. And the printed wiring board 21
The terminal accommodating portion 42 is mounted from below the lower surface of the lower case, and soldering of each of the insertion leg pieces 42 and the conductive layer 24 is performed. At this time, since each terminal 42 is held by the bottom wall 32a of the terminal accommodating portion 32, the bottom wall 32a serves as a holding means. Therefore, with this configuration, the configuration of the terminal housing / holding member 31 can be simplified.

In the above embodiment, the terminal accommodating portion 32 is provided with the plurality of openings 34 for individually accommodating the respective connection terminals 41. It may be changed to one opening.

In this way, the configuration of the terminal accommodating portion 32 can be simplified. -The terminal accommodating part 32 and the printed wiring board 21 are fixed by fastening members such as screws. In the embodiment, the terminal accommodating portion 32 and the printed wiring board 21 are fixed to each terminal 41.
Is performed only by soldering the insertion leg piece 42 and the conductive layer 24. For this reason, stress is likely to be applied to each insertion leg piece 42, and there is a possibility that the insertion leg piece 42 may be damaged. Therefore, in this way, it is possible to prevent the insertion leg piece 42 from being damaged.

The terminal receiving portion 32 and the printed wiring board 2
The fixing with the fixing member 1 is not limited to the fastening member, and may be fixed with, for example, an adhesive. In the above embodiment, the printed wiring board 21 has the elongated holes 22.
Is transparent. This may be changed to a plurality of square holes through which each male tab 13 can be individually inserted.

In the above-described embodiment, the connection terminals 41 are accommodated in all the openings 34 of the terminal accommodating portion 32. However, the present invention is not limited to this. You may make it accommodate. That is, out of the five openings 34, only two of the openings 34 have the terminals 41.
May be accommodated respectively.

Next, in addition to the technical ideas described in the claims, the technical ideas grasped by the above-described embodiments will be listed below together with their effects. (1) In the mounting structure of the connection terminal according to claim 2 or 3, the holding means is a lid mounted from a side where the connection terminals are housed in the terminal housing. A mounting structure for connecting terminals.

According to the invention described in (1), each terminal can be held in the terminal accommodating portion with a simple configuration. (2) The connection terminal mounting structure according to any one of claims 2 and 3, and the technical idea 1, wherein the terminal accommodating portion has a bottomed box shape. Mounting structure.

(3) Claims 1 to 3, technical ideas 1 and 2
The connection terminal according to any one of the above, wherein the connection terminal has an insertion portion (female tab) that is inserted into a male terminal (male tab). Mounting structure.

(4) Claims 2 and 3, technical ideas 1 to 3
3. The connection terminal mounting structure according to claim 1, wherein the terminal accommodating portion is directly fixed to the printed wiring board.

(5) Claims 2 and 3, technical ideas 1 to 3
3. The connection terminal mounting structure according to claim 1, further comprising: fastening means for directly fixing the terminal accommodating portion to the printed wiring board.

According to the inventions described in (4) and (5), breakage of the insertion leg piece can be prevented. (6) In a state where the insertion leg pieces of the connection terminal are inserted into the plurality of insertion holes provided in the printed wiring board, the conductive layer formed on the printed wiring board and the insertion leg pieces are soldered. In the method of attaching connection terminals to fix the connection terminals to the printed wiring board, the terminal holding members holding the plurality of connection terminals at predetermined positions are held by the terminal holding members. Is attached to the printed wiring board so that each connection terminal is attached to the printed wiring board, and each connection terminal and the conductive layer are soldered to fix the connection terminal to the printed wiring board. How to attach the connection terminal.

(7) Claims 1 to 3, technical ideas 1 to 5
An electric connection box having the connection terminal mounting structure according to any one of the above.

[0047]

As described above in detail, according to the first aspect of the present invention, when mounting a plurality of connection terminals on a printed wiring board, it is not necessary to mount each terminal one by one. Therefore, the attachment property of the connection terminal to the printed wiring board can be improved.

According to the invention described in claim 2, according to claim 1
In addition to the effect described above, the terminal can be prevented from contacting another conductive member. According to the third aspect of the present invention, since the terminal is held by the terminal holding member, the terminal can be stably mounted on the printed wiring board even with one insertion leg piece. . Therefore, productivity can be improved while preventing poor connection to the printed wiring board.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of a connection terminal mounting structure of the present invention.

FIG. 2 is an exemplary plan view of the terminal accommodating portion according to the embodiment;

FIG. 3 is a sectional view taken along line AA of FIG. 2 in a state where a connection terminal is connected to a terminal accommodating portion.

FIG. 4 is an exploded perspective view showing another embodiment of the connection terminal mounting structure of the present invention.

FIG. 5 is a cross-sectional view showing a conventional connection terminal mounting structure.

[Explanation of symbols]

11 laminated board, 12 busbar, 13 male tab, 21
... Printed wiring board, 22 ... Long hole, 23 ... Through hole, 24 ...
Conductive layer, 31: terminal housing / holding member as terminal holding member, 32: terminal housing, 32a: bottom wall, 33: lid as holding means, 34: opening, 35: square hole, 36: through hole, 37: terminal holding member, 38: terminal receiving hole, 41: connection terminal, 42: insertion leg piece.

Claims (3)

[Claims] 1. A state in which a printed wiring board having a plurality of insertion holes, and a plurality of connection terminals having insertion leg pieces inserted through the insertion holes, wherein the insertion leg pieces are inserted through the insertion holes. In a mounting structure of a connection terminal, wherein the conductive layer of the printed wiring board is soldered to the insertion leg piece to fix the connection terminal to the printed wiring board, the plurality of connection terminals are positioned at predetermined positions relative to each other. A connection terminal mounting structure, wherein the connection terminal is mounted on the printed wiring board using a terminal holding member that holds the connection. 2. The connection terminal mounting structure according to claim 1, wherein the terminal holding member holds a terminal accommodating portion accommodating the plurality of connection terminals and each of the connection terminals in the terminal accommodating portion. A terminal accommodating holding member having a holding means, wherein the connection terminal is attached to the printed wiring board in a state of being accommodated in the terminal accommodating portion. 3. The connection terminal mounting structure according to claim 1, wherein the connection terminal has only one insertion leg piece.