JP2008300071A - Multi-stage connector and connecting method of multi-stage connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector enabled to make insulation displacement connection to wires and capable of making a substrate area necessary for wire connection small. <P>SOLUTION: For the connector electrically connecting a plurality of wires to a wiring pattern of the substrate, insulation displacement parts connecting each terminal of the plurality of wires in insulation displacement are made in two steps in a height direction or a horizontal direction, with at least a part of housings containing connector terminals of each step in an overlapped state. With this, insulation displacement connection of the wires to the connector is made possible, and an inter-terminal distance of adjacent connector terminals in a depth direction of the substrate can be made minimum. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a connector for connecting an electric wire (wiring) to a wiring board, and more particularly to a multistage connector capable of press-connecting an electric wire to the connector and a method for connecting the multistage connector to the board.

  As a method of connecting an electric wire (wiring) from the outside to the wiring pattern formed on the wiring board (substrate), (1) a method of directly soldering the wiring conductor to the wiring pattern, and (2) connection with the wiring pattern Mounting a male or female connector, connecting a male or female connector that can be joined to these connectors on the wiring side, and joining both connectors, (3) press-connecting the wiring to the connector terminal, There is a method of soldering connector terminals to a wiring pattern.

  In the above method 1, the mounting soldering process for electronic components and the soldering process for wiring (electric wires) must be performed separately, and the soldering process is required twice. Moreover, the thing by the fitting connection of a male-female connector increases the number of parts of a connector, and becomes high cost. In addition, in the case of a fitting type connector, the area of the connector portion that occupies the board is increased, and it is necessary to secure a space for fitting work when assembled to a vehicle or the like. Furthermore, recently, with the demand for miniaturization of electronic devices and the like, miniaturization of the board is desired. Therefore, it is desirable to minimize the area of the connector connection portion occupying the board.

In order to avoid such a problem, the connector of the present invention relates to a connector adopting the connector connection by the pressure contact connection of the above (3). As a conventional technique of a connector using such a pressure connection, Patent Document 1 discloses a technique in which a plurality of connector terminals are arranged in a staggered manner, and a fixing portion of the connector terminal protruding through the substrate and protruding to the back surface is soldered. Has been.
Japanese Patent Application Laid-Open No. 11-054164

  According to the connector described in Patent Document 1, when the number of wirings (wires) to be connected increases, a plurality of wires are connected in a line in the width direction of the wiring board, or a plurality of connectors are connected in the board depth direction. Had to be placed in a row. However, when all the electric wires are connected in a line in the width direction of the wiring board, when there are many electric wires to be connected, the wiring board becomes large in one direction. On the other hand, when multiple contact connection terminals are arranged in the depth direction of the board, if the distance between the connection terminals is too close, the front connector will become an obstacle when connecting the wires to the connection terminals in the back. Can not. For this reason, it is necessary to widen the distance between the connection terminals in the depth direction, which eventually increases the area occupied by the connection terminal portion. In addition, there is a problem that it is difficult to route the wires to the back so that the wires do not interfere with each other. For this reason, the connector of the prior art has not been able to sufficiently cope with these demands for miniaturization.

  The present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a multistage connector capable of reducing the board area required for connecting an electric wire from the outside while enabling pressure connection to the connector. It is to provide.

  In the present specification, the pressure connection is, firstly, a connection blade by pressing a wiring cable such as an electric wire between the V-shaped connection blades provided in the pressure connection portion. In this method, the cable sheath is cut and the internal conductor and the connecting blade are brought into contact with each other to obtain electrical connection. However, the cable sheath does not necessarily need to be cut by the connecting blade. That is, it includes a case where an electric connection is obtained by pressing and pushing an electric wire having an inner conductor exposed by peeling off the cable sheath onto a V-shaped contact blade (or connecting portion).

  In order to solve the above-described problem, the multistage connector according to the first aspect of the present invention is a connector that electrically connects a plurality of electric wires to a wiring pattern of a substrate, and press-fits each end of the plurality of electric wires. Two or more press contact connection parts to be connected are provided in the height direction or the horizontal direction.

  According to this aspect, by constructing the press contact connection portion in multiple stages, interference between the wire connected to the front connector and the wire connected to the back connector is prevented, and the distance between adjacent terminals in the depth direction is reduced while enabling the press contact connection. It can be shortened. As a result, the area occupied by the board of the connection portion can be reduced while enabling the pressure contact connection of the electric wires.

  The multistage connector according to another aspect of the present invention includes a plurality of connector terminals each having the pressure contact connection portion, and one or more terminal housings individually accommodating one or more pressure contact connection portions among the plurality of connector terminals. And a plurality of housings provided for each stage, and a multistage connection is possible by combining the plurality of housings.

In this aspect, the effect equivalent to that of the first aspect is obtained by stacking the connection terminals together with the housing in multiple stages while protecting the connector terminals using the housing. According to this aspect, not only the connector terminals can be protected, but also the combination by overlapping the entire connectors can be made more robust.
A multi-stage connector according to another aspect of the present invention is formed by stacking and combining the plurality of housings one by one in the height direction from the surface of the board, and the electric wires are horizontal to the board from the housing at each stage. It is drawn out.

  According to this aspect, it is possible to arrange a plurality of press contact connection parts having different heights so as to gradually increase from the near side toward the depth direction. Due to the difference in height, it is possible to prevent interference between the electric wire connected to the front connector and the electric wire connected to the rear connector. As described above, since there is no interference of the electric wires in the depth direction, it is not necessary to provide a clearance between the connection terminals adjacent in the depth direction, and the interval between the connector terminals adjacent in the depth direction can be reduced. As described above, according to the multistage connector of the first aspect of the present invention, it is possible to perform the press contact connection while avoiding the interference of the electric wires, and it is possible to reduce the board occupation area of the connection portion.

  In the multistage connector according to another aspect of the present invention, the connector terminals of each stage in which the press contact connection portions are accommodated in the plurality of housings provided for each stage are press-fitted into the through holes of the substrate. A press-fit connection portion; the press-fit connection portion; and a conductor portion that connects and supports the press-fit connection portion and the press-contact connection portion so that a height from the press-fit connection portion to the press-contact connection portion differs for each stage. The conductor portion extends downward from an end portion of the press contact connection portion, and the side surfaces of the press contact connection portion, the conductor portion, and the press fit connection portion have an inverted L shape.

  According to this aspect, it is possible to press-connect as it is without bending the electric wire from the horizontal direction, and to secure electrical connection with the lower press-connecting portion by the conductor connecting portion. As a result, useless wire routing is eliminated. Further, by arranging a connector terminal having a high height in the depth direction, the front electric wire and the rear electric wire do not interfere with each other.

  The connection of the multistage connector to the board is performed by press-fitting into the through hole. Since the electric wire is press-connected and the connection to the substrate is a press-fit connection, solder connection is not necessary, and the connection process between the electric wire and the substrate can be simplified.

  The multistage connector according to another aspect of the present invention is characterized in that the pressure contact position of the electric wire in the pressure contact connection portion provided in two or more stages is at a position partially overlapping in the projection map onto the substrate.

  According to this aspect, when overlapping in the height direction, a depth is obtained without being affected by the size of the housing by arranging a part of the housing of each step adjacent to the top and bottom in a stepped manner. It becomes possible to make the space | interval of the connection terminal of a direction closer.

  The multistage connector according to another aspect of the present invention is characterized in that the connector terminal is provided with an engaging portion for pressing with a press-fitting jig on the press-fit connecting portion.

  According to this aspect, each connector terminal can be pressed and pressed by the press-fitting jig, so that the press-fitting operation is facilitated.

  The multistage connector according to another aspect of the present invention is characterized in that the conductor portion of the connector terminal has an inverted L-shape that protrudes from the rear of the housing to the opposite side of the electric wire.

  According to this aspect, since the conductor portion protrudes from the rear of the housing and is exposed to the outside, the engaging portion and the press-fit connection portion that are pressed by the press-fitting jig are also exposed to the outside of the housing. Processing becomes easy.

In the multistage connector according to another aspect of the present invention, the plurality of housings are arranged on the surface of the substrate in a state of being stacked one by one in parallel with the substrate, and the electric wires are connected to the housings of each step. It is characterized by being pulled out perpendicular to the substrate. According to this aspect, the electric wire can be drawn out in a direction perpendicular to the substrate. The multistage connector according to another aspect of the present invention is such that the connector terminal of each stage is connected to the press-contact connection portion and the through hole of the substrate. A press-fit connection portion to be press-fitted and a linear belt-like conductor portion that supports the press-fit connection portion to the press-fit connection portion in a substantially straight line.

  According to this aspect, since the press-fit connection portion, the press-contact connection portion, and the electric wire are aligned substantially in a straight line, when the electric wire is drawn out in the direction perpendicular to the substrate, useless spaces such as the drawing of the electric wire can be eliminated.

  In the multistage connector according to another aspect of the present invention, the connector terminal connects the press contact connection portion, a solder connection portion connected to the substrate by soldering, and the press contact connection portion and the solder connection portion. A conductor portion having a different length according to the height of the press-contact connection portion is provided.

  According to this aspect, since the solder connection portion of the multistage connector can be connected to the substrate simultaneously with the soldering of the mounting component by the reflow furnace, a special substrate connection process is not necessary for the substrate connection of the multistage connector. .

The connection method of the multistage connector according to another aspect of the present invention is a plurality of types of connector terminals having different heights from the press-fit connection part for connecting the electric wire to the press-fit connection part for obtaining an electrical connection with the substrate, A method of connecting an electric wire to a substrate using a multistage connector comprising a plurality of types of housings that accommodate the connector terminals at the same height,
(A) connecting the electric wire to the press-contact connection portion of the connector terminal accommodated in the housing;
(B) The connector terminal accommodated in the first-stage housing is accommodated in one of the housings by press-fitting the press-fit connection portion of the connector terminal having the lowest height into the substrate. A step of connecting the substrate;
(C) Housed in the remaining one of the housings and housed in the second-stage housing by press-fitting the press-fit connection portion of the connector terminal having the second lowest height into the board. A process of connecting the connector terminals to the board;
At least.

  According to this aspect, since the press-fit connection to the substrate is performed for each stage, the pressing force required for the press-fit connection is small. Therefore, the stress applied to the board and other components during press-fit connection can be reduced, so that the stress applied to the soldered part and the wiring pattern due to the bending of the board and the stress applied to the mounted electronic parts are reduced. It becomes possible to suppress damage of each part. In particular, this connection method is effective when the number of connector terminals in the horizontal direction is large and the number of overlapping stages of height or horizontal connectors is increased.

The connection method of the multistage connector according to another aspect of the present invention includes a plurality of types of connector terminals having different heights from the press-fit connection part for connecting the electric wire to the press-fit connection part for obtaining an electrical connection with the substrate, A method of connecting an electric wire to a substrate using a multistage connector comprising a plurality of types of housings that accommodate the connector terminals at the same height,
(A) The connector terminal accommodated in the first-stage housing is accommodated in one of the housings by press-fitting the press-fit connection portion of the connector terminal having the lowest height into the substrate. A step of connecting the substrate;
(B) connecting a first electric wire to the press contact connection portion of the connector terminal housed in the first stage housing;
(C) Housed in the remaining one of the housings and housed in the second-stage housing by press-fitting the press-fit connection portion of the connector terminal having the second lowest height into the board. A process of connecting the connector terminals to the board;
(D) connecting a second electric wire to the press contact connection portion of the connector terminal housed in the second stage housing;
At least.

  In this aspect, the connector terminal is first connected to the substrate, and then the electric wire is press-connected. Also in this aspect, since the press-fit connection to the substrate is performed for each stage, the pressing force required for the press-fit connection is small. Therefore, the stress applied to the board and other components during press-fit connection can be reduced, so that the stress applied to the soldered part and the wiring pattern due to the bending of the board and the stress applied to the mounted electronic parts are reduced. It becomes possible to suppress damage of each part. This connection method is effective when the number of connector terminals in the horizontal direction is large and the number of overlapping stages of the height or horizontal connectors is increased.

The connection method of the multistage connector according to another aspect of the present invention is a plurality of types of connector terminals having different heights from the press-fit connection part for connecting the electric wire to the press-fit connection part for obtaining an electrical connection with the substrate, A method of connecting an electric wire to a substrate using a multistage connector comprising a plurality of types of housings that accommodate the connector terminals at the same height,
(A) connecting the electric wire to the press-contact connection portion of the connector terminal accommodated in the housing;
(B) The housing for housing the connector terminal accommodated in the housing is combined and joined in order from the lowest height of the accommodated connector terminal to form a multistage connector to which wires are connected. Process,
(C) a step of simultaneously press-fitting the press-fit connection portions of the connector terminals accommodated in the multistage connector to which the electric wires are connected, into the substrate;
It is characterized by providing.

  According to this aspect, since the multistage connectors can be press-fitted in a lump, the substrate connection can be completed by a single press-fitting process. Therefore, the press-fitting work process can be reduced. This method is effective particularly when the number of connector terminals to be connected is small. In addition, it is effective for automatic press-fitting by a mechanism that does not apply stress to the substrate.

  According to the present invention, the multi-stage connector in the height direction or the horizontal direction according to the direction of the electric wire to be connected can be prevented from interfering with the electric wires to be connected, and Since unnecessary routing is not required, the distance between the connector terminals in the board connecting portion can be reduced. As a result, the board occupation area of the connector connecting portion can be reduced, and the board can be miniaturized.

Next, embodiments embodying the present invention will be described with reference to the drawings. In the description of each embodiment, similar parts are denoted by the same reference numerals, and redundant description is omitted.
(First embodiment)
The multistage connector according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 7. FIG. 1 is a front view showing a pressure contact connector 10 according to the first embodiment of the present invention, and FIG. 2 is a side view schematically showing a state in which the multistage connector 10 shown in FIG. is there. FIG. 3 is a view showing a connector terminal used in the first embodiment, FIG. 4 is a view for explaining a method of attaching the connector terminal to the housing, and FIG. 5 shows a state in which the connector terminal is attached to the housing. FIG. FIG. 6 is an example in which a connector is connected to the wiring board 90 using a press-fitting jig. FIG. 7 is a schematic diagram for explaining a connection procedure of the multistage connector according to the first embodiment of the present invention to the board.

  A wiring board (simply referred to as “substrate” in this specification) 90 shown in FIG. 2 and the like is a board on which electronic components are mounted and which constitutes an electronic circuit network by a wiring pattern. By connecting various electric signals and power cables to the wiring pattern portion of the substrate 90, electric power and electric signals are input / output from the outside. The substrate 90 performs electrical or electronic processing of the input signal, or branches and outputs the input electrical signal or power supply line. The multistage connector of the present invention is a connector for electrically connecting an electric signal line or an electric power line to the board 90.

  As shown in FIGS. 1 and 2, the multistage connector 10 includes a plurality of connector terminals 11 and a plurality of housing elements 20 (see FIG. 4). First, the structure of the connector terminal 11 is demonstrated using FIG.3 and FIG.4. 3A shows a front view of the connector terminal 11 (a front view based on FIG. 1), FIG. 3B shows a plan view thereof, and FIG. 3C shows a right side view thereof. ing.

  The connector terminal 11 includes a press-fit connection portion 12 at one end and a press-fit connection portion 14 for connecting to the substrate 90 at the other end. The press contact connection portion 12 and the press fit connection portion 14 are connected by a strip-shaped conductor portion 13 extending from the rear of the press contact connection portion 12. The press-fit connection portion 14 has an elliptical shape having an elastic force in the width direction, and is press-fitted against the elastic force of the press-fit connection portion 14 into a small-diameter through hole 92 (see FIG. 2) provided in the substrate 90. . The through hole 92 is formed by plating that is connected to the wiring pattern either above or below the substrate 90. When the press-fit connection portion 14 is press-fitted into the through-hole 92, the press-fit connection portion 14 contacts the through-hole inner wall while being contracted by an elastic force. As a result, the press-fit connection portion 14 can obtain electrical connection with the wiring of the substrate 90 through the through hole 92.

  As shown in FIG. 4, the connector terminal 11 is inserted into a through hole 23 provided at the bottom of the bottom of the housing 20 and mounted in a state as shown in FIG. 5. As shown in FIG. 5, the connector terminal 11 is press-fitted and connected to the substrate 90 in a state of being mounted in the housing 20.

  In the example shown in FIG. 1, the multistage connector 10 is stacked in three stages in the height direction, but can be a two-stage or four-stage or more connector. In FIG. 1, three housings 20a to 20c are stacked in three stages, and each stage has a structure in which five connector terminals 11 can be mounted. Therefore, the multistage connector 10 shown in FIG. 1 has a total of 15 connector terminals, and 15 wires can be connected. As shown in FIG. 2, the five connector terminals 11a to 11c at each stage have different lengths of the legs (conductor portions) 13a to 13c according to the height of each stage. Further, as shown in FIG. 4, the housing 20 has an engagement protrusion 21 on the upper side, and a recess 22 for fitting the engagement protrusion 21 on the lower surface. Therefore, it is possible to perform multi-stage stacking accurately and firmly. Further, in order to accurately position the multistage connector according to the present invention on the board 90, a coupling protrusion 91 (see FIG. 2) that fits into the recess 22a of the lowermost housing 20a is also provided on the board 90. Is preferred.

  The procedure for press-fitting the multistage connector 10 into the board will be described with reference to FIG. FIG. 6 is a side view of the first-stage pressure contact connector. A press-fitting jig 80 is used for press-fitting into the substrate 90. The pressing foot 81 of the press fitting jig 80 is inserted from the rear side of the connector terminal 11 of the housing 20a, and the tip contact portion 81a of the pressing foot 81 is brought into contact with the engaging portion 15a of the connector terminal 11a. Thereafter, by pressing the press-fitting jig 80 downward, the connector terminal 11a is press-fitted into the substrate 90 together with the housing 20a as shown in FIG. 6B.

  Since one connector terminal 11 has two engaging portions 15, a press-fitting jig 80 corresponding to the press-fit connection connector 10 having five connector terminals 11a in the lateral direction as shown in FIG. Ten pressing feet 81 (not shown) are provided at predetermined intervals in the lateral direction. The number of pressing feet 81 of the press-fitting jig 80 is determined according to the number of connector terminals in one horizontal row.

  With reference to FIG. 7, the connection procedure of the multistage connector 10 according to the first embodiment of the present invention will be described in order from the connection of the electric wire to the connection to the substrate 90. As shown in FIGS. 7A, 7 </ b> B, and 7 </ b> C, the electric wires 95 are connected to the first-stage press contact connection portion 12 a to the third-stage press contact connection portion 12 c, respectively. First, the electric wire 95 is press-connected to the press-connecting part 12a of the first-stage connector terminal 11a, the press-connecting part 12b of the second-stage connector terminal 11b, and the press-connecting part 12c of the third-stage connector terminal 11c. To do. In the example of FIG. 1, five electric wires 95 are connected by pressure welding at each stage. The pressure connection is performed by pushing the electric wire 95 between the V-shaped connection blades 12v of the pressure connection portion 12 (see FIGS. 3A and 4). Thereby, the coating | coated part of an electric wire is cut by the connection blade 12v, the connection blade 12v and the conductor in an electric wire contact, and an electrical connection is obtained.

  When the press-contact connection of the electric wires 95 is completed, the press-fit connection portion 14a of the first-stage connector terminal 11a is press-fitted into the through hole 92 of the substrate 90 as shown in FIG. At this time, as described with reference to FIG. 6, the press-fitting jig 80 is used. Similarly, the press-fit connection portion 14b of the second-stage connector 11b is press-fitted into the through hole 92b of the substrate 90. At this time, as shown in FIG. 7 (E), the first stage housing 20a is located at a position close to the first stage connector terminal 11a so that a part of the second stage housing 20a overlaps the first stage housing 20a. The second-stage connector terminal 11b is press-fitted. Thus, by arranging the housings 20a and 20b of the adjacent connector terminals 11a and 11b so as to overlap each other in the upward direction, the connector terminals 11a and 11b can be arranged close to each other.

  Similarly, as shown in FIG. 7F, the second-stage housing 20b is brought close to a part of the third-stage housing 20c so as to overlap the through-hole 92c of the substrate 90. 14c is press-fitted into the substrate 90. In this way, the connection between the electric wire 95 and the substrate 90 by the multistage connector 10 according to the first embodiment of the present invention is completed.

According to 1st Embodiment comprised as mentioned above, there exist the following effects.
(1) As apparent from FIG. 7, according to the multistage connector 10 according to the first embodiment, the multistage connectors 10a to 10c from the first stage to the third stage are partially overlapped. It is possible to reduce the distance between the through holes 92a, 92b, and 92c in the depth direction of the substrate 90. Thereby, it is possible to increase the density of the connection terminals on the substrate surface, and it is possible to connect many wires to a small substrate area.

(2) In the first embodiment, since the multistage connector can be press-fitted into the substrate 90 one by one, it is possible to press-fit with a relatively small force. Further, since press-fitting can be performed for each stage, the press-fitting operation can be easily performed even if the number of overlapping stages increases, and the number of overlapping stages is not limited with respect to the press-fitting process.

(3) Further, when the multistage connector is inserted into the board, it is possible to press into the board one by one from a low board, so that it is possible to press in with a relatively weak force. Therefore, less stress is applied to the board and other components during press-fit connection, so stress on the soldered part and wiring pattern due to the bending of the board and stress on the mounted electronic parts are reduced. It becomes possible to suppress damage. This connection method is particularly effective when the number of connector terminals in the lateral direction is large and the number of overlapping stages of the height or lateral connectors is increased.

  In this embodiment, the connector 95 is press-fitted into the board 90 after the electric wire 95 is pressed into the press-connecting portion 12, but the present invention is not limited to this connection order. For example, after connecting the connector terminal 11 to the substrate 90, the electric wire 95 may be press-contacted to the press-connecting connection portion 12.

(Second Embodiment)
A multistage connector according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a front view showing a multistage connector 30 according to the second embodiment of the present invention, and FIG. 9 is a side view schematically showing a state in which the multistage connector 30 shown in FIG. . FIG. 10 is a view showing the connector terminal 31 used in the second embodiment, and FIG. 11 is a view for explaining a method of connecting the multistage connector 30 to the wiring board 90 using the press-fitting jig 82. FIG. 12 is a schematic diagram for explaining a procedure for connecting the multistage connector 30 according to the second embodiment to the board. 10A, 10B, and 10C are a front view, a plan view, and a right side view of the connector terminal 31, respectively, as in FIG.

  In the multi-stage connector 30 according to the second embodiment, all the press-fit connection portions 14 are simultaneously attached to the substrate 90 in a state where the multi-stage connector 30 is assembled after the electric wires are press-contacted to the press-contact connection portions of the connector terminals 31. Press fit. In the embodiment of FIG. 8, as in the first example, five connector terminals are provided in the lateral direction, and an example in which three stages are stacked in the upward direction is shown, but the number of connector terminals in the lateral direction is shown. And the number of stacking stages is not limited to this.

  The multistage connector 30 according to the second embodiment also includes a plurality of connector terminals 31 and a plurality of stages of housings 25. 8 to 10 exemplify a multi-stage connector 30 having a three-stage structure as in the first embodiment, and the second embodiment has substantially the same structure as that of the first embodiment. However, the connector terminal 31 and the housing 25 are illustrated in FIGS. The structure of is slightly different.

  First, the structure of the connector terminal 31 will be described. The connector terminal 31 also basically has the same press-connecting portion 12 and press-fit connecting portion 14 as the connector terminal 11 of the first embodiment. However, as shown in FIG. The structure is different. That is, the engaging portion of the connector terminal 31 includes a first engaging portion 33 and a second engaging portion 35 that extend in the front-rear reverse direction at different heights.

  Thus, the height of the first engaging portion 33 and the second engaging portion 35 is changed when the adjacent connector terminals 31 arranged at the same height are arranged close to each other. This is because the first engaging portion 33 and the second engaging portion 35 are overlapped at different heights so as not to collide with each other. Thereby, since each adjacent connector terminal 31 can be arrange | positioned closely, the arrangement space of the connector terminal 31 can be made small.

  Further, the first engagement portion 33 and the second engagement portion 35 are supported by support arms 32 and 34 extending to the left and right, respectively. As described above, the support arms 32 and 34 are extended in the left-right direction so that the first and second engaging portions 33 and 35 are arranged on the outer side of the press-contact connecting portion 12. As described above, the first and second engaging portions 33 and 35 are disposed outside the press-connecting connection portion 12, so that the press-fitting jig 82 can be used in the press-fitting process using the press-fitting jig 82 described later. It is possible to penetrate through the housing 25.

  The housing 25 has substantially the same structure as that of the first embodiment, but as can be seen with reference to FIGS. 9 and 11, a through hole (not shown; the through hole in FIG. 4) through which the connector terminal 31 passes. 23) is provided slightly in front of the through hole 23 of the first housing 20. Therefore, a little space is formed behind the conductor portion 13 of the connector terminal 31. In this configuration, the press-fitting jig 82 (see FIG. 11) can be inserted also from the rear side of the conductor portion 13 of the connector terminal 31. Although the shape of the through hole for inserting the connector terminal 31 of the housing 25 is not shown, the support arms 32 and 34 and the first and second engaging portions 33 and 35 extending laterally of the connector terminal 31 are not shown. The hole is shaped so that can penetrate. The electrical connection between the structure of the press-fit connection portion 14 and the board wiring by press-fitting into the board 90 is the same as that described in the first embodiment.

  Next, a procedure for connecting the multistage connector 30 according to the second embodiment to the substrate 90 will be described with reference to FIG. As shown in FIGS. 12A to 12C, each electric wire 95 is pressed into contact with the press-connecting portion 12a of the connector terminal 31a provided in the first-stage housing 25a. Similarly, the second-stage, The electric wire 95 is press-contacted to the press-connecting portions 12b and 12c of the third-stage housings 25b and 25c. Next, as shown in FIG. 12D, the housings 25a to 25c, to which the electric wires 95 are press-connected, are sequentially stacked and combined to form the state shown in FIG. Next, as shown in FIG. 12E, the multi-stage connector 30 combined in this way is press-fitted into the substrate 90, and the state shown in FIG.

  The press-fitting process of the multistage connector 30 onto the board 90, which is a feature of the second embodiment, will be described in more detail with reference to FIG. A press-fitting jig 82 is used for the press-fitting process. 11 is a right side view of the multistage connector 30 and the press-fitting jig 82 as viewed from the side. FIG. 11A shows a state before the press-fitting process, and FIG. 11B shows a state immediately after the press-fitting process is completed. It is a figure which shows the state by which the press-fit jig | tool 82 is still inserted in the housing. In FIG. 11, in order to make the press-fitting process procedure easy to understand, it is schematically illustrated in a simplified manner.

  The press-fitting jig 82 includes long and short pressing feet 83 and 84 for pressing the connector terminal 31 downward to press-fit the same number of connector terminals. In FIG. 11, the side view of the press-fitting jig 82 is shown. In the number of each part, “a” is added after the number of each part in the first stage, and “b” is added in the second stage. The third row is marked with “c”. The press-fitting jig 82 abuts the tip abutting portions 85 and 86 of the long and short pressing feet 83 and 84 to the first and second engaging portions 33 and 35 of all the connector terminals 31 of the multistage connector 30, respectively. When pressed, the connector terminal 31 is pressed downward, and the press-fit connecting portion 14 of the connector terminal 31 is pressed into the board 90.

  The press-fitting jig 82 has a set of long and short pressing feet 83 and 84 corresponding to the number of connector terminals 31. Therefore, in the case of the press-fitting jig 82 of FIG. 11 used for press-fitting of the multistage connector 30 shown in FIG. 8, since the five connector terminals 31 correspond to the connector terminals stacked in three stages per stage, Fifteen sets of pressing feet 83 and 84 are provided. In FIG. 11, since it is a side view, only three pressing legs 83a to 83c and 84a to 84c corresponding to the three-stage connector terminals 31 viewed from the lateral direction are shown.

  As shown in FIG. 11A, the press-fit connection portion of the press-connect connector 30 is placed on a through hole (not shown in FIG. 11) of the substrate 90, and the press-fit jig 82 is attached to the connector terminal 31 in the housing 25. Inserted from the gap 36, the distal end portions 85a to 85c and 86a to 86c of the long and short pressing feet 83 and 84 are brought into contact with the first and second engaging portions 33a to 33c and 35a to 35c of the connector terminal 31, respectively. Let Clearances 36 are provided on the front, rear, left, and right of each housing 25 and the connector terminal, and the long and short pressing feet 83 and 84 are provided at a distance from the width of the press-fit connection portion 14 of the connector terminal 31. Therefore (not shown), the long and short pressing feet 83 and 84 can penetrate the housing 25, and the tip contact portions 85 and 86 are brought into contact with the first and second engaging portions 33 and 35, respectively. Is possible.

  For example, the long and short pressing feet 83a and 84a for press-fitting the first-stage connector terminal 31 pass through the front side portion of the press-fit connection portion 14 of the second-stage housing 25b, and then the first-stage housing. It penetrates the rear side of the connector terminal 31 of 25a. Thereby, the tip contact portions 85a and 86a of the press-fitting jig 82 can be brought into contact with the first and second engaging portions 33a and 35a of the first-stage connector terminal 31. The long and short pressing feet 83b and 84b for press-fitting the second stage penetrate the rear side portion of the press-fit connection part 14 of the third-stage housing 25c, and then the connector terminals 31 of the second-stage housing 25b. It penetrates the rear side. Accordingly, the tip contact portions 85b and 86b are in contact with the first and second engagement portions 33b and 35ba of the second-stage connector terminal 31. The long and short pressing feet 83c and 84c for press-fitting the third step only penetrate the rear side portion of the connector terminal 31 of the third-stage connector housing 25c, so that the tip contact portions 85c and 86c are connected to the third step. The first and second engaging portions 33c and 35c of the eye connector terminal 31 can be brought into contact with each other. In this way, all the tip contact portions 85, 86 of the press-fitting jig 82 are brought into contact with the first and second engaging portions 33, 35 of all the connector terminals 31, and then pressed downward. Then, the press-fit connecting portion 14 of the connector terminal 31 is press-fitted into the through hole of the substrate 90, and the state shown in FIG.

According to 2nd Embodiment comprised as mentioned above, there exist the following effects.
(1) In the multistage connector 10 according to the second example, as in the first embodiment, the multistage connectors 10a to 10c from the first stage to the third stage are partially overlapped. By allowing the shapes to be combined, the distance between the through holes 92a, 92b, 92c in the depth direction of the substrate 90 can be reduced. Thereby, it is possible to increase the density of the connection terminals on the substrate surface, and it is possible to connect many wires to a small substrate area.

(2) In addition, the multistage connector according to the second embodiment can be press-fitted into the substrate at the same time using a pressure welding jig in a state where the multistage connectors are stacked in a plurality of stages (three stages in this example). The number can be reduced.

(Third embodiment)
A multistage connector according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 13 is a front view showing an example of the pressure contact connector 40 according to the third embodiment of the present invention, and FIG. 14 is a side view schematically showing a state in which the multistage connector 40 shown in FIG. It is. FIG. 15 is a view showing the connector terminal 41 used in the third embodiment, and FIG. 16 is a view for explaining press-fitting processing for connecting the multistage connector 40 to the wiring board 90 using the press-fitting jig 87. is there. 15A, 15B, and 15C are a front view, a plan view, and a right side view of the connector terminal 41, respectively, similarly to FIG.

  The multistage connector 40 according to the third embodiment is the same as the first embodiment except that the structure of the connector terminal 41 is slightly different and the through hole of the housing 26 is provided in the rear. As is apparent from FIG. 15C, the connector terminal 41 used in the third embodiment has an inverted L shape extending downward after the conductor portion 42 extends rearward of the crimp connection portion 12. ing. That is, the conductor portion 42 of the connector terminal protrudes rearward rather than downward. Corresponding to the structure of the connector terminal 41, the through hole 27 of the housing 26 is provided in the rear wall of the housing. As shown in FIG. 14, the conductor portions 42a to 42c of the connector terminal protrude rearward through through holes 27a to 27c provided below the rear wall portion. Therefore, the press-fitting operation is easy because the press-fitting jig 87 does not need to penetrate the housings 26a to 26c during the press-fitting process.

According to 3rd Embodiment comprised as mentioned above, there exist the following effects.
In the third embodiment, the conductor portion 42 protrudes rearward and the engaging portion 15 is exposed to the rear outer side of the housing 26.

(1) As a result, the connector terminals can be brought close to each other in the same manner as in the first embodiment, so that the through holes for press-contacting the connector terminals can be arranged close to each other, so that the area of the press-fit connection portion of the board can be reduced. In addition to being able to

(2) As shown in FIGS. 16 (A) and 16 (B), even when the press-fitting jig 87 is used for batch press-fitting processing, the engaging portion 15 is pushed down by the press-fitting jig 87 without passing through the housing 26. It becomes possible to press-fit. Therefore, it is possible to make the pressing jig 87 and the housing 26 have a very simple structure. Further, since the engaging portions 15a to 15c are visible, the press-fitting work is extremely easy.

(Fourth embodiment)
A multistage connector according to a fourth embodiment of the present invention will be described with reference to FIGS. 17 is a view showing a state in which the multistage connector 50 according to the fourth embodiment of the present invention is connected to the substrate 90, and FIG. 18 is a view of the multistage connector 50 shown in FIG. 17 as viewed from the right (arrow direction). It is a side view which shows typically the state where the electric wire 95 and the board | substrate 90 were removed. FIG. 19 is a view showing a connector terminal 51 used in the fourth embodiment, and FIG. 20 is a view for explaining a method of attaching the connector terminal 51 to the housing 28. FIG. 21 is a view showing a state in which the connector terminal 51 is mounted on the housing 28, and FIG. 22 is a schematic view for explaining the press-fitting process of the multistage connector to the substrate according to the fourth embodiment. FIG. 19 (A) shows the connector terminal 51 with the state of FIG. 18 as a front view, FIG. 19 (B) is a plan view thereof, and FIG. 19 (C) is a right side view thereof.

  As can be seen from FIG. 17, in the multistage connector 50 according to the fourth embodiment, the electric wire 95 introduced from directly above the substrate 90 is press-connected to the connector terminal without changing the direction of the electric wire 95 as it is, The press-fitting into the substrate 90 is enabled. In this case as well, the area of the board connecting portion can be reduced by arranging them in a plurality of stages in the horizontal direction.

  As shown in FIG. 18, the fourth embodiment shows an example in which five connector terminals 51 are arranged toward the back of the substrate 90 as in the other embodiments. As can be seen from FIGS. 19, 20, and 21, in the connector terminal 51 used in the fourth embodiment, the connection blades 57 v for press contact connection are arranged perpendicular to the substrate 90, and are perpendicular to the substrate 50. It is configured so that the electric wire introduced into can be press-connected in the lateral direction as it is. The housing 28 has a structure that can be connected in a plurality of stages in a direction parallel to the substrate surface (horizontal direction in FIG. 17).

  The press-fitting process to the substrate 90 will be described with reference to FIG. As shown in FIG. 22 (A), the electric wire 95 guided from above the substrate 90 is brought into pressure contact with the connector terminal 51 of the first-stage housing 28a, resulting in the state shown in FIG. 22 (B). Similarly, the electric wires 95 are connected to the connector terminals 51b of the second-stage housing 28b and the connector terminals 51c of the third-stage housing 28c, so that the housings 28a, 28b, and 28c overlap the substrate 90 in the horizontal direction. It is press-fitted to reach the state of FIG.

  According to the fourth embodiment configured as described above, the electric wire 95 connected in the vertical direction with respect to the board is press-connected to the connector terminal 51 without changing the direction, and the connector housing 28 is left in the horizontal direction. It is possible to press-fit the substrate 90 in a plurality of stages. Therefore, an area for routing the electric wire is not required, and the distance between the connector terminals can be made closer, so that even when the number of connection stations is large, the board area of the connector connection portion can be reduced.

(Fifth embodiment)
A multistage connector according to a fifth embodiment of the present invention will be described with reference to FIGS. FIG. 23 is a front view showing a pressure contact connector 60 according to a fifth embodiment of the present invention, and FIG. 24 is a right side view schematically showing a state in which the multistage connector 60 shown in FIG. is there. FIG. 25 is a diagram showing a connector terminal 61 used in the fifth embodiment, and FIG. 26 is a schematic diagram for explaining a procedure for connecting the multistage connector 60 according to the fifth embodiment to the substrate 90. 25A, 25B, and 25C are a front view, a plan view, and a right side view of the connector terminal 61, respectively, similarly to FIG.

  The multistage connector 60 according to the fifth embodiment has substantially the same configuration as that of the first embodiment or the second embodiment, but differs in that it is connected to the substrate 90 not by press fitting but by soldering. Yes. Therefore, the connector terminal 61 includes a solder connection portion 62 instead of the press-fit connection portion. Further, since there is no need for press-fitting, the engaging portion 15 or the like as in the first embodiment is not provided.

  Since the structure of the multistage connector 60 is basically the same as that of the first embodiment or the second embodiment based on the above-described differences, only the connection procedure with the substrate 90 will be described with reference to FIG. To do. In the fifth embodiment, the substrate 90 is electrically connected by soldering. Therefore, first, the housings 67a to 67c containing the connector terminals 61 are combined in several stages (three stages in the example shown in FIGS. 23 to 26), and the connection wiring pattern portion of the substrate 90 and the solder connection portion 62 are aligned. Let it be placed. Thereafter, the multi-stage connector 60 is electrically connected to the substrate 90 by soldering the solder connection portion 62 together with the mounting component 94 in a reflow furnace or the like. This leads to the state of FIG. Thereafter, as shown in FIG. 26 (B), the electric wires 95 are sequentially press-connected to the press-connecting portions 14a, 14b, 14c of the first, second, and third-stage connector terminals 61a, 61b, 61c. 26C, that is, the electric wire 95 is connected to the wiring pattern of the substrate 90 via the crimping connector 60 as shown in FIG.

According to 5th Embodiment comprised as mentioned above, there exist the following effects.
(1) According to the multistage connector 10 according to the fifth example, even when the connection to the substrate 50 is performed by soldering, the first to third stages are performed similarly to the first embodiment. The multi-stage connectors 10a to 10c up to the above can be combined in a stepped state in a partially overlapped state. Thereby, the space | interval of the through-holes 92a, 92b, 92c of the depth direction of the board | substrate 90 can be narrowed. Therefore, it is possible to increase the density of the connection terminals on the board surface, and it is possible to connect many wires to a small board area.

  (2) In the fifth embodiment, the pressure contact connection portion 14a has a structure in which a plurality of steps are stacked so that a stepped step can be formed in the height direction, thereby enabling high-density connection, Soldering with a reflow furnace is possible. Therefore, since the soldering can be performed simultaneously with the soldering of the mounting component, it is possible to complete the soldering of the connector and the mounting component by one soldering. Since the press contact connection portions 14a to 14c are exposed with steps in a stepped manner, the electric wires 95 are pressed in order from the lower (first stage) to the higher (third stage) after the soldering is completed. By connecting, all the electric wires 95 can be connected.

(Sixth embodiment)
A multistage connector according to a sixth embodiment of the present invention will be described with reference to FIGS. FIG. 27 is a front view showing a pressure connector 70 according to a sixth embodiment of the present invention, and FIG. 28 is a right side view schematically showing a state in which the multistage connector 70 shown in FIG. is there. FIG. 29 is a diagram showing a connector terminal 71 used in the sixth embodiment, and FIG. 30 is a schematic diagram for explaining a procedure for connecting the multistage connector 70 according to the sixth example to the substrate 90.

  The multistage connector 70 according to the sixth embodiment has substantially the same configuration as that of the sixth embodiment, but the connection to the substrate 90 is not performed by soldering on the surface of the substrate 90 but by soldering on the back surface of the substrate. There are some differences. Therefore, the connector terminal 71 is a pin-shaped solder connection portion 72 that penetrates the substrate 90.

  The structure of the sixth embodiment is exactly the same as that of the fifth embodiment except for the pin-shaped solder connection portion 72. Soldering of the back surface of the substrate 90 can be performed by a flow furnace. The procedure for attaching the multistage connector to the substrate 90 and the procedure for connecting the electric wires 95 are the same as those in the fifth embodiment except that the soldering to the substrate 90 is performed on the back surface. Is not required.

  According to the multistage connector according to the sixth embodiment configured as described above, even when the back surface of the board is connected to the board by soldering, the effective effects of the multistage connector can be obtained. As is apparent from the fifth and sixth embodiments, according to the present invention, the multistage connector of the present invention is not limited to press-fitting or soldering as a method of connecting to the board, and connector terminals The effect of the multistage connector of the present invention can be achieved by changing the shape of the connection portion between the connector terminal and the board in accordance with the method of connecting the board and the board.

The front view which shows the press-contact connector which concerns on 1st Embodiment of this invention. The side view which shows typically the state by which the multistage connector shown in FIG. 1 was connected to the wiring board. It is a figure which shows the connector terminal used in 1st Embodiment, (A) is a front view of the connector terminal 11, (B) is the top view, (C) shows a right view. The figure for demonstrating the method to attach a connector terminal to a housing. The figure which shows the state which attached the connector terminal to the housing. The figure for demonstrating the method of connecting a connector to the wiring board 90 using a press-fitting jig. The schematic diagram explaining the connection procedure to the board | substrate of the multistage connector concerning the 1st Embodiment of this invention. The front view which shows the multistage connector which concerns on 2nd Embodiment of this invention. The side view which shows typically the state by which the multistage connector shown in FIG. 8 was connected to the board | substrate. It is a figure which shows the connector terminal used by 2nd Embodiment, (A), (B), (C) is the front view of a connector terminal, a top view, and a right view, respectively. The figure explaining the method of connecting a multistage connector to a wiring board using a press-fitting jig. The schematic diagram for demonstrating the procedure which connects the multistage connector concerning a 2nd Example to a board | substrate. The front view which shows an example of the press-contact connector which concerns on 3rd Embodiment of this invention. The side view which shows typically the state by which the multistage connector shown in FIG. 13 was connected to the board | substrate. These are figures which show the connector terminal used in 3rd Embodiment, (A), (B), (C) is the front view, top view, and right view of a connector terminal, respectively. The figure for demonstrating the press-fit process which connects a multistage connector to a wiring board using a press-fit jig | tool. The figure which shows the state which connected the multistage connector concerning the 4th Embodiment of this invention concerning this invention to the board | substrate. The side view which shows typically the state which looked at the multistage connector shown in FIG. 17 from the right direction (arrow direction) in the state which removed the electric wire and the board | substrate. It is a figure which shows the connector terminal used in 4th Embodiment, (A) shows the connector terminal by making the state of FIG. 18 into a front view, (B) is the top view, (C) is It is the right view. The figure for demonstrating the method to attach a connector terminal to a housing. The figure which shows the state which attached the connector terminal to the housing. The schematic diagram for demonstrating the press injection process to the board | substrate of the multistage connector by a 4th Example. The front view which shows the press-contact connector which concerns on 5th Embodiment of this invention. The right view which shows typically the state by which the multistage connector shown in FIG. 23 was connected to the board | substrate. It is a figure which shows the connector terminal used in 5th Embodiment, (A), (B), (C) is the front view of the connector terminal 61, a top view, and a right view, respectively. The schematic diagram for demonstrating the procedure which connects the multistage connector concerning 5th Embodiment to a board | substrate. The front view which shows the press-contact connector which concerns on 6th Embodiment of this invention. The right view which shows typically the state by which the multistage connector shown in FIG. 27 was connected to the board | substrate. It is a figure which shows the connector terminal used in 6th Embodiment. The schematic diagram for demonstrating the procedure which connects the multistage connector concerning a 6th Example to a board | substrate.

Explanation of symbols

10, 30, 40, 50, 60, 70 ... multi-stage connectors 11, 31, 41, 51, 61, 71 ... connector terminals 12 ... pressure contact connection parts 12v ... V-shaped connection blades 13, 63 ... conductor parts 14, 54 ... Press-fit connection part 15, 55 ... Engagement part 20, 25, 26, 28, 67 ... Housing 21, 91 ... Protrusion part 22 ... Recess part 23, 27 ... Through hole 32, 34 ... Support arm 33 ... First engagement part 35 ... 2nd engaging part 36 ... Gap 80, 82, 87 ... Press-fit jig 81, 83 ... Tip contact part 81a, 85, 86 ... Tip contact part 90 ... Substrate 92 ... Through hole 95 ... Electrical wire

Claims (13)

  A connector for electrically connecting a plurality of electric wires to a wiring pattern on a substrate, wherein two or more pressure connection portions for press-connecting the terminals of the plurality of electric wires are provided in the height direction or the horizontal direction. Multi-stage connector featuring   A plurality of connector terminals each having the pressure contact connection portion and one or more terminal accommodating portions individually accommodating one or more of the pressure contact connection portions among the plurality of connector terminals are provided for each stage. The multistage connector according to claim 1, further comprising a plurality of housings, wherein the multistage connection is possible by combining the plurality of housings.   The plurality of housings are formed by stacking and combining the plurality of housings one by one in the height direction from the surface of the substrate, and the electric wires are drawn horizontally from the housings of each step with respect to the substrate. Multistage connector.   The connector terminals of each stage in which the press contact connection parts are respectively housed in the plurality of housings provided for each stage are a press fit connection part press-fitted into a through hole of the substrate, the press contact connection part, The press-fit connection portion and a conductor portion for connecting and supporting the press-contact connection portion so that the height from the press-fit connection portion to the press-contact connection portion is different for each step, and the conductor portion is an end of the press-contact connection portion. The multistage connector according to claim 3, wherein the multistage connector extends downward from a portion, and has a reverse L-shaped side surface shape of the press contact connection portion, the conductor portion, and the press fit connection portion.   5. The multistage connector according to claim 3, wherein the pressure contact position of the electric wire in the pressure contact connection portion provided in two or more stages is at a position at least partially overlapping in the projection map onto the substrate.   6. The multistage connector according to claim 4, wherein the connector terminal is provided with an engaging portion for pressing with a press-fitting jig on the press-fit connecting portion.   The multi-stage connector according to claim 6, wherein the connector terminal has an inverted L-shaped shape in which the conductor portion protrudes from the rear side of the housing to the side opposite to the electric wire.   The plurality of housings are arranged on the surface of the substrate in a state of being stacked one by one in parallel with the substrate, and the electric wires are drawn from the housing at each step perpendicular to the substrate. The multistage connector according to claim 2.   The connector terminals at each stage are formed in a linear strip shape that supports the press-contact connection portion, a press-fit connection portion that is press-fitted into the through hole of the substrate, and a connection from the press-contact connection portion to the press-fit connection portion in a substantially straight line. The multistage connector according to claim 8, further comprising: a conductor portion.   The connector terminal has a length corresponding to a height of the pressure contact connection portion, a solder connection portion connected to the substrate by soldering, and the pressure contact connection portion connecting the pressure contact connection portion and the solder connection portion. The multistage connector according to claim 2, further comprising different conductor portions. Plural types of connector terminals having different heights from the press-contact connecting portion for connecting the electric wire to the press-fit connecting portion for obtaining the electrical connection with the substrate, and plural types of housings for accommodating the connector terminals at the same height A method of connecting an electric wire to a substrate using a multistage connector comprising:
(A) connecting the electric wire to the press-contact connection portion of the connector terminal accommodated in the housing;
(B) The connector terminal accommodated in the first-stage housing is accommodated in one of the housings by press-fitting the press-fit connection portion of the connector terminal having the lowest height into the substrate. A step of connecting the substrate;
(C) Housed in the remaining one of the housings and housed in the second-stage housing by press-fitting the press-fit connection portion of the connector terminal having the second lowest height into the board. A process of connecting the connector terminals to the board;
A multi-stage connector connection method comprising: Plural types of connector terminals having different heights from the press-contact connecting portion for connecting the electric wire to the press-fit connecting portion for obtaining the electrical connection with the substrate, and plural types of housings for accommodating the connector terminals at the same height A method of connecting an electric wire to a substrate using a multistage connector comprising:
(A) The connector terminal accommodated in the first-stage housing is accommodated in one of the housings by press-fitting the press-fit connection portion of the connector terminal having the lowest height into the substrate. A step of connecting the substrate;
(B) connecting a first electric wire to the press contact connection portion of the connector terminal housed in the first stage housing;
(C) Housed in the remaining one of the housings and housed in the second-stage housing by press-fitting the press-fit connection portion of the connector terminal having the second lowest height into the board. A process of connecting the connector terminals to the board;
(D) connecting a second electric wire to the press contact connection portion of the connector terminal housed in the second stage housing;
A multi-stage connector connection method comprising: Plural types of connector terminals having different heights from the press-contact connecting portion for connecting the electric wire to the press-fit connecting portion for obtaining the electrical connection with the substrate, and plural types of housings for accommodating the connector terminals at the same height A method of connecting an electric wire to a substrate using a multistage connector comprising:
(A) connecting the electric wire to the press-contact connection portion of the connector terminal accommodated in the housing;
(B) The housing for housing the connector terminal accommodated in the housing is combined and joined in order from the lowest height of the accommodated connector terminal to form a multistage connector to which wires are connected. Process,
(C) a step of simultaneously press-fitting the press-fit connection portions of the connector terminals accommodated in the multistage connector to which the electric wires are connected, into the substrate;
A multi-stage connector connection method comprising:

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