JP2005005618A - Printed circuit board provided with surface mounted connector and electric junction box housing the board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate the work of connecting a printed circuit board and a terminal for connection with a connector and to increase the density of pattern wiring. <P>SOLUTION: A surface mounted connector 30 including a terminal material 41 having a vertical tab 42 continuous to a horizontal connection 46 mounted on a conductor 23 of the board 22 via a bent part 43 and also including a resin block 51 having a base terminal of the tab 42 of the terminal material 41 buried therein is provided to a printed circuit board 22. The resin block of the connector 30 is mounted on the board 22, the horizontal connection 46 of the terminal material 41 is connected to the conductor 23 by soldering, and the tab 42 extruded from the resin block 51 is projected into a connector housing. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printed circuit board on which a surface mount connector is mounted and an electrical connection box that accommodates the printed circuit board, and more particularly, to improve a connection structure between a conductor of the printed circuit board and a terminal material protruding from the connector.
[0002]
[Prior art]
As shown in FIG. 7, the number of electrical connection boxes mounted on automobiles is increasing that accommodates a printed circuit board 3 as an internal circuit routing material in a case 2 of the electrical connection box 1. In this case, the terminal 4 is inserted into the terminal hole formed in the conductor portion of the printed circuit board 3, the protruding end thereof is connected to the conductor by the solder 6, and the terminal 4 is connected to the connector housing portion 5 formed in the case 2. It is protruding.
[0003]
[Patent Literature]
Japanese Patent Application Laid-Open No. 11-45747
[Problems to be solved by the invention]
However, in the said structure, it is necessary to provide a terminal hole in a conductor. With the recent increase in functionality of automobiles, the number of components mounted on a printed circuit board has increased, and thus conductors are often provided on both sides of the printed circuit board 3. In this case, when the terminal hole 4 is formed in the conductor and the terminal material is inserted and soldered, the pattern of the conductor on the back surface is also restricted, making it difficult to form a high-density pattern. The number of layers must be increased, which increases the size of the electrical junction box, which is contrary to the demand for downsizing of the electrical junction box due to a decrease in the in-vehicle space.
In addition, soldering work from the back side of the printed circuit board 3 is required, and there is a problem that workability is poor.
Furthermore, when the terminal material connected to the conductor protrudes into the connector housing portion and is connected to the external circuit, the conductor must be extended to the position of the connector housing portion and connected to the terminal material. There is also a problem that the pattern becomes long and a large number of circuits cannot be provided.
[0005]
The present invention has been made in view of the above problems, and improves the connection structure between the conductor of the printed circuit board and the terminal material protruding from the connector, improves the connection structure with the connector, and facilitates the connection work. An object of the present invention is to provide a printed circuit board having a high degree of freedom in circuit wiring and capable of high-density wiring, and an electric junction box containing the printed circuit board.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention comprises a terminal material having a vertical tab that is continued to a horizontal connection portion via a refracting portion, and a resin block in which the base end portion of the terminal material is embedded. Provide surface mount connector,
The surface mount connector is mounted on the surface of the substrate, the horizontal connection portion of the terminal material is connected to the conductor on the surface of the substrate with solder, and the tab protruding from the block is connected to another circuit by connector connection. A printed circuit board is provided.
[0007]
With the above configuration, since the terminal material can be soldered directly to the conductor surface side of the printed circuit board, terminal holes that penetrate the printed circuit board become unnecessary, restrictions on circuit wiring are reduced, and the front and back surfaces of the printed circuit board are reduced. A circuit wiring area can be sufficiently secured on both surfaces, and high-density circuit formation is possible. In addition, it is not necessary to solder from the back side.
Further, by embedding the base end portion of the tab of the terminal material in the resin block, when inserting and connecting the connector terminal as a counterpart and the tab, the resin block supports the tab of the terminal material, It is possible to improve the electrical connection reliability by preventing deformation and breakage of the soldered portion.
[0008]
The refracting portion of the terminal material has an inverted L shape, and is provided with a horizontal refracting portion that is refracted in the horizontal direction from the base end of the tab. The base part of the substantially vertical refracting part is provided with the horizontal connecting part, and the horizontal connecting part is located on the same plane as the bottom surface of the block.
By making the terminal material into the above-mentioned shape, even when the conductor connected to the connector by the terminal material is separated from the connector connection position to some extent, it is possible to route by extending the horizontal refracting portion.
[0009]
In the resin block, the pair of left and right terminal members having a symmetrical shape are opposed to each other so that the base end portion of the tab is embedded, and the horizontal refracting portion protrudes on both the left and right sides of the block. The tab is projected at a constant pitch from the tip end surface made of
Alternatively, the base end portion of the tab of the pair of left and right terminal members is embedded in the block, and the base end portion of the tab of another terminal member having a refracting portion located in a direction orthogonal to the refracting portion of the terminal member is embedded. The tabs of the other terminal members may protrude from the block in parallel with the tabs of the pair of left and right terminal members.
[0010]
The resin block may be formed by resin-molding the base end portion of the tab of the terminal material.
[0011]
Alternatively, when embedding the pair of left and right terminal materials having a symmetrical shape in the block, the block is composed of a first block material made of a resin molded product and a pair of second block materials, and the first block material is on the tip side. The first block material is formed into a T-shape having a protruding portion, and the second block material is fitted into recesses formed on the bottom surface side of the left and right tip side protruding portions of the first block material. Are combined so that the vertical cross section becomes a rectangular shape, and the horizontal refracting portion of the pair of left and right terminal members between the bottom surface of the left and right tip side protruding portions of the first block member and the tip end surface of the second block member. And projecting through the tab from the terminal hole drilled in the first block material, while projecting the horizontal refracting portion of each terminal material on the outer surface of the first and second block materials, 1. Second block material It may be located on a bottom surface flush.
With the above configuration, the work of molding the terminal material in the resin block is not required, and the terminal material and the block can be assembled detachably, making it easy to cope with design changes and the like. Reusability and versatility can be improved.
[0012]
It is preferable that the block of the surface mount connector is screwed and fixed to the substrate. Thereby, the reliability of a soldering part can be improved.
[0013]
Further, according to the present invention, the printed circuit board is accommodated inside the case, and the tab of the terminal material of the mounting component is projected into the connector accommodating portion provided on the outer surface of the case or the connector accommodating portion provided on the partition wall inside the case. There is also provided an electrical connection box characterized in that the tab is fitted to a terminal in a connector to be fitted in the connector housing portion to be electrically connected.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIGS. 1 to 3 show an electrical junction box 10 according to the first embodiment of the present invention. The electrical junction box 10 is connected to an automobile wire harness (not shown), and the interior of an upper case 11 and a lower case 12 is shown. In addition, printed circuit boards 21 and 22 and bus bars 25 to 28 are accommodated.
[0015]
Specifically, as shown in FIGS. 2A and 2B, the two printed circuit boards 21 and 22 are fixed to the upper and lower ends of the peripheral wall 13a of the printed circuit board holding case 13 accommodated in the case, and the peripheral wall 13a therebetween. A partition wall 13b projecting from the intermediate position is interposed, and the partition wall 13b is attached at an interval in the vertical direction. In addition, the bus bars 25 to 28 are stacked in four upper and lower layers with an insulating plate interposed therebetween. In the lower case 12, first, the printed circuit board holding case 13 to which the printed circuit boards 21 and 22 are attached is accommodated, and a bus bar support case 15 for providing a space is placed on the upper part, with an insulating plate interposed therebetween. Bus bars 25 to 28 are stacked.
[0016]
On the upper surface of the upper case 11, a connector housing 14, a relay housing portion 17, and a fuse housing portion 18 are provided. A plurality of connector housing portions 19 are provided on the lower surface of the lower case 12.
[0017]
Among the printed boards 21 and 22, the lower printed board 22 is provided with conductors on both upper and lower sides, connected to the conductor on the upper surface side and mounted with the electronic component E, and on the surface of the conductor 23 on the lower surface side, A surface mount connector 30 including a terminal member 41 connected to the conductor 23 and a resin block 51 holding the terminal member 41 is attached downward.
[0018]
As shown in FIG. 3, the surface mount connector 30 is configured such that the tab 42 of the terminal material 41 protrudes from the terminal hole 19 a of the connector housing portion 19 formed on the lower surface of the lower case 12 and is fitted into the connector housing portion 19. The terminal 20a of the connector 20 to be joined is fitted and connected.
[0019]
Specifically, the terminal member 41 is formed by continuously forming a horizontal connection portion 46 placed on the surface of the conductor 23 and a tab 42 in the vertical direction via the refracting portion 43. The refracting portion 43 has an inverted L shape, a horizontal refracting portion 44 that is refracted in the horizontal direction from the base end of the tab 42, and a substantially vertical refracting portion 45 that is refracted from the distal end of the horizontal refracting portion 44 toward the printed circuit board. The horizontal connection portion 46 is provided at the base end of the substantially vertical refracting portion 45.
[0020]
As shown in FIGS. 2 (A), 2 (B) and 3, the resin block 51 has a pair of symmetrical left and right terminal members 41 facing each other, and the base end portion of each tab 42 is placed on the resin block 51. Molded inside and integrally molded. The horizontal refracting portions 44 of the left and right terminal members 41 protrude from the left and right sides of the resin block 51, respectively, and from the front end surface 51a of the resin block 51, that is, from the lower surface in the illustrated example, the tabs 42 are provided. Projecting downward at a constant pitch. Further, the horizontal connection portions 46 of the left and right terminal members 41 are located on the same plane as the bottom surface 51 b of the resin block 51.
[0021]
In the surface mount connector 30 including the terminal material 41 and the resin block 51, the horizontal connection portion 46 of the terminal material 41 is connected to the conductor 23 of the printed circuit board 22 by soldering A.
Further, a screw hole 61 having a screw groove is provided in the bottom surface 51b of the resin block 51, and a mounting hole 62 having a screw groove is provided in the printed circuit board 22. The mounting component 30 is screwed and fixed to a predetermined position of the printed circuit board 22 by screwing into the mounting hole 62 and the screw hole 61.
Since the terminal material 41 integrated with the resin block 51 and the conductor are fixed by soldering, it is not always necessary to screw and fix the small resin block. Further, an uneven fitting portion may be provided and held between the substrate and the resin block 51.
[0022]
When the surface mount connector 30 having the above configuration is provided, the terminal material 41 can be soldered from the surface side of the conductor 23 of the printed circuit board 22, so that it is not necessary to provide innumerable terminal holes in the printed circuit board 22. The circuit wiring area on 22 is not narrowed, and the entire area can be used effectively. Further, the refracting portion 43 provided in the terminal material 41 can be connected to a conductor located at a distant position, and can be connected to other conductors, so that the conductor wiring pattern of the printed circuit board 22 can be connected. The degree of freedom can be increased.
Further, the base end portion of the tab 42 of the terminal material 41 is embedded in the resin block 51, and the bottom surface 51 b of the resin block 51 and the horizontal connection portion 46 of the terminal material 41 are positioned on the same plane, thereby fitting with the connector terminal. It is possible to prevent the tab 42 of the terminal material 41 from sinking or deforming at the time. And the reliability of a soldering part can be improved by screw-fixing the surface mount connector 30 to the printed circuit board 22. FIG.
[0023]
The surface mount connector 30 is a surface mount connector 31 in which three terminal members 41 (41a, 41b, 41c) are resin-molded in a resin block 51 as in the modification shown in FIGS. You can also
[0024]
Specifically, among the three terminal members 41, the pair of left and right terminal members 41a and 41b are symmetrical, and the base end portion of the tab 42a of the terminal member 41a is located on the left side of the resin block 51 in the figure, and the terminal member 41b. The base end portion of the tab 42b is embedded at a position on the right side of the resin block 51 in the figure, and the other terminal member 41c located at the center is a refracting portion 43c perpendicular to the refracting portions 43a and 43b of the terminal members 41a and 41b. The base end of the tab 42c is embedded in the resin block 51 at an intermediate position between the terminal members 41a and 41b.
From the front end surface 51a of the resin block 51, tabs 42a, 42b, 42c of the terminal members 41a, 41b, 41c protrude in parallel in three stages. Further, the horizontal refracting portion 44a of the terminal member 41a and the horizontal refracting portion 44b of the terminal member 41b are respectively protruded from the left and right side surfaces 51c and 51d of the resin block 51, and the horizontal refracting portion 44c of the terminal member 41c is the resin block 51. It protrudes from one side surface 51e perpendicular to the left and right side surfaces 51c and 51d.
[0025]
5 (A), (B) and FIGS. 6 (A), (B) show a surface mount connector 32 according to the second embodiment of the present invention, and a resin block 52 is configured with the resin block 51 of the first embodiment. Differently, the method of embedding the terminal material 41 is also different. However, since the configuration is otherwise the same, the same reference numerals are given and the description is omitted.
[0026]
Each of the resin blocks 52 includes a first block member 53 made of a resin molded product and a pair of second block members 54, and a pair of left and right terminal members 41 are embedded in a rear assembly.
The first block member 53 has a T-shape having left and right protrusions 53b and 53c on the front end surface 53a side. The left and right protrusions 53b and 53c penetrate from the bottom surfaces 53d and 53e to the front end surface 53a. A pair of left and right terminal holes 53h and 53i are formed. Terminal guide grooves 53j and 53k are provided on the bottom surfaces 53d and 53e of the protrusions 53b and 53c from the lower ends of the terminal holes 53h and 53i to the ends of the protrusions 53b and 53c. Further, the second block material 54 is fitted into the recesses 53f and 53g formed on the bottom surfaces 53d and 53e side of the projecting portions 53b and 53c of the first block material 53, respectively. , 54 are combined so that the vertical cross section of the entire block 52 is rectangular. A similar terminal guide groove 54 b is provided on the tip surface 54 a of the second block material 54 at a position facing the terminal guide grooves 53 j and 53 k of the first block material 53.
[0027]
When the pair of terminal members 41 is embedded in the resin block 52 having the above-described configuration, the terminal holes 53h and 53i formed in the first block member 53 are protruded from the distal end surface 53a through the tabs 42, and the left and right sides of the first block member 53 are left and right. The horizontal refraction portions 44 of the pair of left and right terminal members 41 are sandwiched between the terminal guide grooves 53j and 53k of the projecting portions 53b and 53c and the terminal guide grooves 54b of the second block member 54, respectively. Further, the horizontal refracting portions 44 of the terminal members 41 are projected from the joint portions of the first and second block members 53 and 54 on the left and right side surfaces 52a of the entire resin block 52. Further, the horizontal connection portion 46 of the terminal member 41 is positioned on the same plane as the bottom surface 52 b of the resin block 52 including the first and second block members 53 and 54.
[0028]
When the surface-mounted connector 32 having the above-described configuration is mounted on the surface of the conductor 23 of the printed circuit board 22, as shown in FIGS. 6A and 6B, a pair of left and right second block members 54 are placed on the substrate surface at predetermined positions. The first block member 53, which is adhesively fixed downward and the tab 42 of the terminal member 41 is inserted, is fitted between the left and right second block members 54 from below, and the horizontal refracting portions 44 of the left and right terminal members 41 are first, The left and right horizontal connection portions 46 are soldered to the conductor 23 while being sandwiched between the second block members 53 and 54.
[0029]
When the surface mount connector 32 having the above-described configuration is used, the molding work of the terminal material 41 to the resin block 52 is not required, and the first block material 53 is fitted by fixing the second block material 54 to the substrate in advance. Can serve as a guide for. Further, since the terminal material 41 can be easily detached from the resin block 52, it is possible to flexibly cope with a design change and the like, and it is possible to improve the reusability and versatility of the parts.
[0030]
In addition, this invention is not limited to the said embodiment. The tab protruding from the surface mount connector may be fitted and connected to a terminal in the connector that is fitted into a connector housing portion formed in a partition wall inside the case of the electrical connection box.
[0031]
【The invention's effect】
As is clear from the above description, according to the present invention, the terminal material can be soldered to the conductor surface of the printed circuit board. As a result, the terminal holes that have been formed innumerably in the printed circuit board are unnecessary, and the printed circuit board area can be effectively used as the circuit wiring area. In addition, by providing a refracting part in the terminal material, it is possible to connect to conductors located at a certain distance from each other without affecting the pattern formation on the circuit board, thereby reducing the restrictions on circuit wiring. High density circuit formation is possible.
[0032]
Furthermore, by embedding the base end portion of the tab of the terminal material in the block, when the mating terminal and the tab are connected to each other, the tab is prevented from sinking, the tab is deformed or the soldered portion is damaged. Can be prevented, and the reliability of the connecting portion can be improved.
[Brief description of the drawings]
FIG. 1 shows an electrical junction box according to a first embodiment of the present invention, in which (A) is a plan view and (B) is a bottom view.
2A is a cross-sectional view of the electrical junction box shown in FIG. 1, and FIG. 2B is an enlarged cross-sectional view of a main part.
3 is an overall perspective view of the mounting component shown in FIG. 2; FIG.
4A and 4B show a mounting component according to a modification of the first embodiment of the present invention, in which FIG. 4A is an overall perspective view, and FIG. 4B is a top view.
5A and 5B show an essential part of a second embodiment of the present invention, in which FIG. 5A is an exploded perspective view of a mounting component, and FIG. 5B is a front view of the mounting component.
6A and 6B are cross-sectional views showing a work procedure for attaching the mounting component shown in FIG. 5 to a printed circuit board.
FIG. 7 is a diagram of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Electrical connection box 11 Upper case 12 Lower case 19 Connector accommodating part 21 and 22 Printed circuit board 23 Conductor 30-32 Surface mount connector 41 Terminal material 42 Tab 43 Refraction part 44 Horizontal refraction part 46 Horizontal connection part 51 and 52 Resin block 53 1st Block material 54 Second block material 60 Screw

Claims (8)

Provided with a surface mount connector consisting of a terminal member having a vertical tab continuous through a refracting part in a horizontal connection part, and a resin block in which a base end part of the terminal member is embedded,
The surface mount connector is mounted on the surface of the substrate, the horizontal connection portion of the terminal material is connected to the conductor on the surface of the substrate with solder, and the tab protruding from the block is connected to another circuit by connector connection. Printed circuit board. The refracting portion of the terminal material has an inverted L shape, and is provided with a horizontal refracting portion that is refracted in the horizontal direction from the base end of the tab. The printed circuit board according to claim 1, wherein the horizontal connection portion is formed at the base end of the substantially vertical refracting portion, and the horizontal connection portion is positioned on the same plane as the bottom surface of the resin block. The pair of left and right terminal materials having a symmetrical shape are embedded in the resin block so as to face each other, and the horizontal refracting portion protrudes on both the left and right sides of the block, and the tab protrudes from the upper surface or the lower surface of the block. The printed circuit board according to claim 1 or 2. The base end portion of the tab of the pair of left and right terminal members is embedded in the resin block, and the base end portion of the tab of another terminal member having a refracting portion located in a direction orthogonal to the refracting portion of these terminal members is embedded, The printed circuit board according to claim 3, wherein tabs of the other terminal material are juxtaposed with the tabs of the pair of left and right terminal materials and protrude from the block. The printed circuit board according to any one of claims 1 to 4, wherein the block is provided by resin-molding a base end portion of the tab of the terminal material. The resin block includes a first block member made of a resin molded product and a pair of second block members. The first block member has a T-shape having a tip-side protruding portion, and the second block member is a first block member. When the first and second block members are combined with each other, the vertical cross section becomes a rectangular shape, and the right and left sides of the first block member are left and right. A horizontal refracting portion of the pair of left and right terminal members is sandwiched between the bottom surface of the tip side protruding portion and the tip end surface of the second block member, and protrudes through the tab from the terminal hole drilled in the first block member. On the other hand, the horizontal refracting portion of each terminal material protrudes from the outer surfaces of the first and second block members, and the horizontal connection portion is positioned in the same plane as the bottom surfaces of the first and second block members. The printed circuit board described. The printed circuit board according to any one of claims 1 to 6, wherein a resin block of the surface mount connector is screwed and fixed to the board. The printed circuit board according to any one of claims 1 to 7 is accommodated in a case, and the surface mounting is performed on a connector accommodating portion provided on an outer surface of the case or a connector accommodating portion provided on a partition wall inside the case. An electrical connection box characterized in that a tab of a terminal material of a connector is protruded, and the tab is fitted to a terminal in a connector to be fitted in a connector housing portion to be electrically connected.

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