JP2005302614A - Structure for attaching connectors to printed circuit board, and attaching method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure for attaching connectors to a printed circuit board by which the arrangement state of press fit terminals can be corrected surely to a normal state, and to provide an attaching method therefor. <P>SOLUTION: A terminal lineup member 14 is formed with pierced holes 14a which correspond to through holes 22, and guide holes 14d which expand as they start continuing to the pierced holes 14a and go toward an outer surface in order to receive circuit board connection portions 13b of the press fit terminals 13 correcting positions of the circuit board connection portions 13b. The member 14 is fixed to the back of the printed circuit board 21. The printed circuit board 21 is faced to a connector housing 12 via the terminal lineup member 14, and the printed circuit board 21 is made to be a near connector portion 11 in the direction of axis of the press fit terminal 13. Consequently, the press fitting of press contact portions 13c of the press fit terminals 13 into through holes 22 can be carried out by correcting positions of tips of the circuit board connection portions 13b by the guide holes 14d of the terminal lineup member 14. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an assembling structure and an assembling method of a connector and a printed circuit board, and more particularly, enables press-fitting into a through hole of a printed circuit board while correcting the alignment of press-fit terminals.

Conventionally, by using a press-fit terminal as described in Patent Document 1, a method that enables electrical connection between a connector and a board without requiring troublesome work such as soldering has been widely adopted. Yes.
For example, as shown in FIGS. 7A and 7B, such a press-fit terminal is provided between a connector portion 2 formed integrally with the case 1 and a printed board 3 attached so as to overlap the case 1. By using it as a connecting member, it is possible to reduce the number of assembly steps.

  The connector portion 2 provided in the case 1 includes a box-shaped connector housing 4 and a plurality of linear press-fit terminals 5 having a terminal connection portion 5a at one end and a substrate connection portion 5b at the other end. ing. The press-fit terminals 5 are arranged on the connector housing 4 such that the terminal connection portions 5a are arranged in the connector housing 4 at a required interval, and the board connection portions 5b are projected through the bottom wall 4a of the connector housing 4 to the outside. The mold is fixed.

  In order to press-fit the press-fit terminal 5 of the connector portion 2 configured in this way into the through hole 3a of the printed circuit board 3 to achieve electrical connection, first connect as shown in FIGS. 6 (A) and 6 (B). The connector part 2 of the power case 1 and the printed circuit board 3 are made to face each other, and a pressing die 6 having a through hole 6 a for receiving the board connection part 5 b of the press-fit terminal 5 is made to face the upper surface of the printed circuit board 3. Next, in order to align the press-fit terminal 5 with the required interval of the through-hole 3 a, a comb blade-shaped alignment jig 7 is provided between the flange 5 d provided on the base side of the press-contact part 5 c of the press-fit terminal 5 and the connector housing 4. It is inserted and arranged from the lateral direction between the bottom wall 4a.

Next, as shown in FIG. 7A, the tip of the substrate connecting portion 5b guided by the alignment jig 7 is moved to the printed board 3 by moving the pressing die 6 relatively to the connector portion 2 side by a press. The press contact portion 5c is press-fitted by being inserted into the through hole 3a and further pressing. Thereafter, as shown in FIG. 7B, the alignment jig 7 and the pressing die 6 are retracted to complete the connection between the connector portion 2 and the printed circuit board 3.
JP-A-2-82480

  By using the alignment jig 7 as described above, the press-fit terminals 5 can be aligned and held at a required interval, so that the press-fit terminals 5 can be press-fitted into the through-holes 3a at a time and efficient printing can be performed. Connection with the substrate 3 can be realized. However, since the alignment jig 7 is made to move forward and backward with respect to the press-fit terminal 5 and has a comb blade shape, correction in the direction orthogonal to the forward and backward movement of the alignment jig 7 with respect to the press-fit terminal 5 is performed. I can only do that. For this reason, if correction is to be performed in both the front, rear, left, and right directions, the two alignment jigs 7 must be used to regulate the two directions orthogonal to each other, which complicates the structure of the correction mechanism and advances and retracts the alignment jig 7. A passage in two directions is required, and depending on the arrangement state of the press-fit terminals 5, it may be difficult to correct the arrangement by such a method.

  The present invention has been made in view of the above-described problems, and when inserting press-fit terminals fixed to a connector portion into a through-hole of a printed circuit board, the arrangement of the press-fit terminals is reliably ensured to a normal state by a simple structure. It is an object of the present invention to provide an assembling structure and assembling method of a connector and a printed circuit board that can be straightened.

In order to solve the above problems, the present invention provides a connector having a linear press-fit terminal having a terminal connection portion with a mating terminal at one end and a board connection portion having a pressure contact portion at the other end at an intermediate portion thereof. A connector formed by aligning and fixing a plurality of housings to a housing, and a printed circuit board provided with a through-hole for receiving the press-fit portion of the press-fit terminal so as to face each other in the axial direction of the press-fit terminal and the printed circuit board In the assembly structure,
On the back surface of the printed circuit board, there are provided a through hole corresponding to a through hole and a guide hole that communicates with the through hole and expands toward the outer surface to correct the position of the board connection portion of the press-fit terminal and accept it. There is provided an assembly structure of a connector and a printed circuit board, wherein a terminal alignment member is fixed and a pressure contact portion of the substrate connection portion is press-fitted into the through hole through the guide hole and the through hole.

  According to the above configuration, since the terminal alignment member having the positioning guide hole is mounted on the back surface of the printed circuit board, one terminal alignment member is printed when the press-fit terminal is press-fitted into the through hole of the printed circuit board. The substrate connection portion of each press-fit terminal can be corrected to the required position in either the front, rear, left or right direction by simply fixing it to the back surface of the substrate.

Further, the terminal alignment member is formed with an engaging recess capable of receiving and engaging the entire jig receiving collar protruding from the board connecting portion of the press-fit terminal.
In this way, since the flange portion of each press-fit terminal is fitted and accommodated in the engagement recess of the terminal alignment member, even if the pitch between the terminals of each press-fit terminal is set to be narrow. Leakage between the flanges of adjacent press-fit terminals can be prevented. In addition, since the insertion depth of the press-fit terminal can be regulated by fitting the flange portion into the engagement recess, the insertion position of the press-fit portion with respect to the through hole can be made uniform, so that the press-fit portion and the through-hole The electrical connection reliability between the two can be improved.

  Preferably, the board alignment member is provided with at least two positioning protrusions protruding toward the printed board side, and the printed board is provided with an attachment hole capable of fitting and fixing the positioning protrusion. . With this configuration, the terminal alignment member for forcing the arrangement of the press-fit terminals can be fitted and fixed in advance at the required position of the printed circuit board, and the workability of the assembly work between the connector and the printed circuit board can be improved. Can be improved. In addition, after press-contacting the press-fit terminal, the board alignment member fixed to the printed circuit board through the positioning protrusion holds the base of the press-fit part of the press-fit terminal. The substrate alignment member can absorb the influence of external vibration at the time. Therefore, it is possible to prevent an unreasonable stress from acting on the press-fit portion of the press-fit terminal, so that a stable electrical connection state can be maintained over a long period of time.

  In another invention, a through hole corresponding to a through hole is formed on the back surface of the printed circuit board, and the board connecting portion of the press fit terminal is received by correcting the position by expanding to the outer surface through the through hole. A terminal alignment member having a guide hole is fixed, the printed circuit board and the connector housing are opposed to each other through the terminal alignment member, and then the printed circuit board and the connector portion are brought close to each other along the axial direction of the press-fit terminal. In this way, the front end of the board connecting portion is inserted into the through hole through the through hole while correcting the position by the guide hole of the terminal alignment member, and the press contact portion of the board connecting portion is sequentially press-fitted into the through hole. A method for assembling the connector and the printed circuit board is provided.

  In this way, in order to correct the arrangement state of the press-fit terminals, an external correction mechanism using an alignment correction jig is not required, and simple and reliable correction of the press-fit terminals can be performed.

In addition, the terminal alignment member is formed with an engagement recess that can receive and engage the entire jig receiving flange protruding from the board connection portion of the press-fit terminal. At the time of press-fitting, the printed circuit board and the connector part are brought close to each other along the axial direction of the press-fit terminal while holding the collar part with a pressing jig, and at the same time the pressure-contact part is press-fitted into the through hole. It is made to fit in the engagement recessed part of a terminal alignment member.
As described above, since the flange portion used for press-fitting the press-fit terminal into the printed circuit board can be pushed into the engagement recess of the terminal alignment member simultaneously with the completion of the press-fitting operation process, each press-fit terminal can be engaged. Adjacent ridges are partitioned by the wall of the terminal alignment member. Therefore, it is possible to prevent a leak from occurring between adjacent ridges without performing a special process.

  As is clear from the above description, according to the assembly structure and the assembly method of the connector and the printed board of the present invention, in the assembly process of the connector and the printed board using the press fit terminal, The press-fit terminals can be press-fitted into the through-holes while restricting the press-fit terminals to the regular arrangement state without requiring a separate mechanism for restricting the arrangement state. Therefore, workability at the time of the assembly can be improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 show an embodiment of an assembly structure of a connector and a printed circuit board according to the present invention. For example, a connector portion 11 to which a connector of a wire harness is connected like various electronic control units mounted on an automobile. Is applied to a unit assembly structure including a case 10 made of synthetic resin and a printed circuit board 21 on which mounting components P such as a large number of electronic components are mounted. The connector portion 11 has a box-shaped connector housing 12 which is disposed at one or a plurality of required portions of the case 10 and is open at one end, and a linear shape which penetrates the bottom wall 12a of the connector housing 12 and protrudes in both the inner and outer directions. The press-fit terminal 13 and a terminal alignment member 14 that is molded separately and corrects the arrangement state of the press-fit terminals 13.

As shown in FIGS. 1B and 1C, the press-fit terminal 13 is composed of a pin-shaped metal member, and one end protruding into the connector housing 12 has a terminal connection portion for a mating connector (not shown). 13a, and the other end protruding vertically outward from the bottom wall 12a is a board connecting portion 13b for the printed board 21. A pressure contact portion 13c connected to the through hole 22 provided in the conductive path in the printed circuit board 21 is provided in the middle of the substrate connection portion 13b. The pressure contact portion 13c is set to have a width dimension slightly larger than the inner diameter of the through hole 22, and in the present embodiment, has a cross-sectional N shape, and is elastically deformed in the center direction when pressed to the through hole 22, and the through hole 22c. The inner surface of the hole 22 can be contacted with a required contact pressure. At the front side of the base portion side of the press contact portion 13c, a rectangular flange portion 13e protruding outward on both sides orthogonal to the axis of the press fit terminal 13 is projected, and the press contact portion 13c of the press fit terminal 13 is connected to the printed circuit board 21. When press-fitting into the through hole 22, a pressing jig 41, which will be described later, is engaged with the flange 13e so as to function as a jig receiving and holding part. Further, the tip end portion of the board connecting portion 13b is formed in a tapered shape so as to have a width dimension smaller than the inner diameter of the through hole 22 as a guide portion 13d to the through hole 22.
Further, the press-fit terminal 13 is molded to the required position of the bottom wall 12a of the connector housing 12 when the connector housing 12 is molded, or is press-fitted into the bottom wall 12a by means such as press-fitting from the outside. 13 is integrated with the case 10.

  The terminal alignment member 14 is made of a synthetic resin plate-like member, and as shown in FIGS. 2A to 2C, the terminal alignment member 14 has an interval that matches the normal arrangement state of the press-fit terminals 13 fixed to the connector housing 12. A plurality of positioning through-holes 14a are formed. The through hole 14 a is formed in a circular shape corresponding to the through hole 22 of the printed circuit board 21, and functions as an introduction path to the through hole 22 of the press fit terminal 13. The through hole 14a is formed with a guide hole 14d that expands in a tapered shape as it reaches the outer surface on the lower surface side of the terminal alignment member 14. The guide hole 14d has a function for correcting the position of the board connecting portion 13b of the press-fit terminal 13 and receiving it, and for smoothly introducing it into the through hole 14a.

A pair of positioning protrusions 14b that protrude vertically upward are integrally formed on both sides of the upper surface of the terminal alignment member 14. The positioning projection 14b has a pin shape, and a tapered introduction portion 14c is formed at the tip. On the other hand, in the vicinity of the region where the plurality of through holes 22 into which the board connection portions 13b are to be inserted are arranged on the printed board 21, the positioning protrusions 14b of the terminal alignment member 14 are fitted to position the terminal alignment member 14 at a required position. An attachment hole 23 for fixing is formed. The mounting hole 23 is set slightly smaller than the outer diameter of the positioning projection 14b, and can be fixed by press-fitting the positioning projection 14b. In other words, in a state where the board connecting portion 13b is press-fitted into the mounting hole 23, the arrangement state of the positioning hole 14a of the terminal alignment member 14 and the through hole 22 is made to completely match.
Further, on the guide hole 14 d side of the terminal alignment member 14, an engagement recess 14 e that is cut and formed to a depth where the entire flange portion 13 e protruding from both sides of the press-fit terminal 13 is completely accommodated is formed on the flange portion of each press-fit terminal 13. Each 13e is formed separately.

Next, a method for assembling the connector and printed circuit board according to the present invention will be described.
First, as shown in FIG. 3, the terminal alignment member 14 is attached and fixed to the required position on the back surface of the printed board 21 into which the press-fit terminal 13 is to be inserted. At the time of mounting, the positioning protrusion 14b of the terminal alignment member 14 is press-fitted into the mounting hole 23 of the printed circuit board 21, so that the through hole 14a and the through hole 22 are fixed in a corresponding state.
Next, as shown in FIG. 4A, the printed circuit board 21 to which the terminal alignment member 14 is attached and the case 10 to which the press-fit terminal 13 is fixed are vertically opposed to a required position of a press machine (not shown). set. Further, a pressing die 31 having an escape hole 31 a corresponding to the arrangement of the through holes 22 is disposed above the printed circuit board 21. Next, the base portion of the flange portion 13e of the board connection portion 13b of each press-fit terminal 13 protruding upward from the bottom surface side of the connector housing 12 is a pressure capable of moving forward and backward outwardly perpendicular to the axial direction of the press-fit terminal 13 A jig 41 is arranged. The pressing jig 41 includes comb blade-shaped holding claws 41a that are inserted between the adjacent press-fit terminals 13 corresponding to the pitch of the press-fit terminals 13 (FIG. 5A). . At the same time, a pressing die 31 is disposed above the area of the printed circuit board 21 where the press-fit terminals 13 are to be press-fitted.

  Subsequently, when the pressing machine 31 is moved down to move the printed board 21 and the case 10 relatively close to each other, as shown in FIG. 4B, first, the board of the press-fit terminal 13 is operated. The guide portion 13d at the tip of the connection portion 13b is sequentially inserted from the guide hole 14d of the terminal alignment member 14. Since the guide hole 14d expands outward from the lower surface, even when the press-fit terminal 13 is slightly bent from the axial direction, when the guide portion 13d at the tip passes through the guide hole 14d, It can be corrected to a normal array state.

Subsequently, when the printed circuit board 21 and the case 10 are further brought closer to each other, as shown in FIG. 5A, each board connection portion 13b regulated by the terminal alignment member 14 is sequentially inserted from the guide portion 13d at the tip to the through hole 14a. And inserted into the through hole 22. Next, as shown in FIGS. 5B and 5C, the press-contact portion 13 c of the press-fit terminal 13 is completely press-fitted into the through hole 22, and the flange portion 13 e is inserted into the engagement recess 14 e of the terminal alignment member 14. Since it fits and engages, it will be in the state isolate | separated by the wall 14f of the terminal alignment member 14 between the collar parts 13e of each adjacent press fit terminal 13. FIG. Thereby, even when the press-fit terminals 13 are in a narrow pitch arrangement state and the flanges 13e are very close to each other, it is possible to prevent a leak from occurring due to the presence of the wall 14f.
When the press contact portion 13c is inserted to the required depth position following the guide portion 13d with the pressing operation of the press machine, the press contact portion 13c is pressed against the inner peripheral surface of the through hole 22 and elastically deformed in the center direction. As a result, the press-fit terminals 13 and the through holes 22 are electrically connected by a required contact pressure. Then, after the press-fitting process of the press-fit terminal 13 into the through hole 22 is completed, the pressing die 31 and the pressing jig 41 are retracted, thereby assembling the connector and the printed board shown in FIG. Can be obtained.

  As described above, the terminal alignment member 14 corrects the arrangement state of the board connecting portions 13b to a normal state, and is positioned from both the front, rear, left, and right directions orthogonal to the press-fit terminals when pressed by a press as in the prior art. There is no need for an alignment jig to be inserted into the. Therefore, the mechanism for correcting the press-fit terminal 13 and the steps required for correction can be simplified, and highly accurate positioning correction can be performed. Furthermore, since the press-fit terminal 13 is held by the terminal-aligning member 14 on the back side of the printed circuit board 21 due to the interposition of the terminal-aligning member 14, it is difficult for the press-fit terminal 13 to be affected by vibrations applied to the entire product. Thus, the connection reliability of the press-fit terminal 13 to the through hole 22 can be improved. In addition, when the press-fit terminal 13 is inserted into the through hole 22, the flange 13e is fitted into the engagement recess 14e of the terminal alignment member 14, and the base of the flange 13e is flush with the lower surface of the terminal alignment member 14. At this point, the pressing jig 41 is brought into contact with the terminal alignment member 14 and completed, so that the insertion depth of the press-fit terminal 13 into the through hole 22 can be made constant.

  In the above-described embodiment, an example in which the press-contact portion 13c has an N-type cross section as the press-fit terminal 13 is shown, but the shape of the press-contact portion 13c is not particularly limited and is generally adopted as a press-fit terminal. It is possible to cope with various shapes such as a needle hole shape.

The assembly structure of the connector and printed circuit board of this invention is shown, (A) is a longitudinal cross-sectional view, (B) is XX cross-sectional view, (C) is YY cross-sectional view of a press-fit terminal. (A) is a perspective view of a terminal alignment member, (B) is a sectional view in the length direction of (A), and (C) is a sectional view in the width direction. It is sectional drawing of the length direction of the state which fixed the terminal alignment member to the printed circuit board. (A) (B) is sectional drawing which shows the press process to the printed circuit board of the press fit terminal by a press. The process of press-fitting the press-fit terminal into the through-hole of the printed circuit board is shown, (A) is a cross-sectional view showing the process in the middle, (B) is a cross-sectional view after completion of press-fitting, and (C) is (B). FIG. It is a perspective view which shows the assembly method of the conventional connector and printed circuit board. (A) (B) It is sectional drawing which shows the press process of the assembly | attachment method using the conventional alignment jig.

Explanation of symbols

12 connector housing 12a bottom wall 13 press-fit terminal 13a terminal connection part 13b board connection part 13c pressure contact part 13e flange 14 terminal alignment member 14a through hole 14b positioning projection 14c introduction part 14d guide hole 14e engagement recess 14f wall 21 printed circuit board 22 Through hole 23 Mounting hole 41 Pressing jig

Claims (5)

  A connector part formed by aligning and fixing a plurality of linear press-fit terminals with a board connection part having a terminal connection part with a mating terminal at one end and a pressure contact part at the other end to the connector housing at an intermediate part thereof And a printed circuit board having a connector and a printed circuit board having a through-hole that receives a press-contact portion of the press-fit terminal so as to face each other in the axial direction of the press-fit terminal. A terminal alignment member having a through hole corresponding to the through hole and a guide hole that is connected to the through hole and expands to the outer surface to correct the position of the board connection portion of the press-fit terminal and can be received is fixed. And a connector formed by press-fitting the pressure-contact portion of the substrate connection portion into the through-hole through the guide hole and the through-hole. Assembled structure of the PC board.   2. The connector and print according to claim 1, wherein the terminal alignment member is formed with an engagement recess capable of receiving and engaging the entire jig receiving flange protruding from the board connection portion of the press-fit terminal. Assembly structure with the substrate.   2. The board alignment member is provided with at least two positioning protrusions protruding toward the printed circuit board side, and the printed circuit board is formed with an attachment hole capable of fitting and fixing the positioning protrusion. Or the assembly structure of the connector and printed circuit board of Claim 2. A connector part formed by aligning and fixing a plurality of linear press-fit terminals with a board connection part having a terminal connection part with a mating terminal at one end and a pressure contact part at the other end to the connector housing at an intermediate part thereof And a method of assembling the connector and the printed circuit board, which is assembled with the printed circuit board provided with a through hole for receiving the press-fit portion of the press-fit terminal facing the axial direction of the press-fit terminal,
On the back surface of the printed circuit board, there are provided a through hole corresponding to a through hole and a guide hole that communicates with the through hole and expands toward the outer surface to correct the position of the board connection portion of the press-fit terminal and accept it. The terminal alignment member is fixed, the printed circuit board and the connector housing are opposed to each other through the terminal alignment member, and then the printed circuit board and the connector portion are brought close to each other along the axial direction of the press-fit terminal. A connector characterized in that the front end of the portion is inserted into the through hole through the through hole while correcting the position by the guide hole of the terminal alignment member, and the press contact portion of the board connecting portion is sequentially pressed into the through hole. Assembly method with printed circuit board.   The terminal alignment member is formed with an engaging recess that can be received and engaged with the entire flange for receiving the jig protruding from the board connecting portion of the press-fit terminal, and when the press contact portion is press-fitted into the through hole. While holding the flange with a pressing jig, the printed circuit board and the connector are brought close to each other along the axial direction of the press-fit terminal, and the press contact portion is press-fitted into the through hole, and at the same time, the flange is aligned with the terminal. The method for assembling the connector and the printed circuit board according to claim 4, wherein the connector is fitted in the engaging recess of the member.

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