JP2008198572A - Electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic device capable of improving connection reliability. <P>SOLUTION: A printed board has a plurality of first lands and a plurality of second lands respectively arranged in a line along an arrangement direction of terminals, the second lands are arranged at positions separated from a body part relative to the first lands, and the first and second lands provide a zigzag pattern. Each terminal reflow-mounted on the second land includes: a first parallel part nearly parallel to the surface of the printed board with at least a part thereof fixed to the body part; a second parallel part nearly parallel to the surface of the printed board, exposed from the body part, and having the mounting part to the second land connected to an end on the side distant from the body part; and a first connection part connecting the first parallel part to the second parallel part. The whole of the first parallel part is arranged in the body part, or an exposure part thereof from the body part to a land forming side is reduced in length relative to the second parallel part, and the second parallel part is positioned at a position close to the surface of the printed board relative to the first parallel part in a direction vertical to the surface of the printed board. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electronic device formed by reflow mounting an electronic component such as a connector on a printed circuit board.

2. Description of the Related Art Conventionally, an electronic device in which an electronic component such as a connector in which a plurality of terminals are arranged along the surface of a printed board is reflow-mounted on a printed board having a land with respect to a main body made of an electrically insulating material. Are known. As such an electronic device, for example, in Patent Documents 1 and 2 (including FIG. 4 of Patent Document 2), a plurality of lands are provided along the terminal arrangement direction, and electronic components are reflow mounted on the printed circuit board. An electronic device is shown. With such a configuration, the main body can be miniaturized in the terminal arrangement direction.
JP-A-11-317265 JP 7-153508 A

  However, in Patent Documents 1 and 2, a terminal connected to a land located closer to the main body than the land by a terminal connected to a land located far from the main body (connecting portion with the land). In addition, the structure is such that heat during reflow is difficult to be supplied. For example, in the configuration shown in Patent Document 2, the terminal extends from the main body portion substantially parallel to the printed circuit board on the side connected to the land, and the tip of the parallel part is bent to form the surface of the printed circuit board. It is vertical and has a structure in which a mounting portion with a land is provided at the tip of the vertical portion. In addition, the higher the height from the surface of the printed circuit board and the longer the length extending from the main body, the more the parallel part of the terminal connected to the land at a position away from the main body. Therefore, at the time of reflow, the terminal connected to the land located at a position away from the main body portion shields heat to the terminal connected to the land located at a position close to the main body portion, and connection reliability is improved at the connection portion. There is a risk of lowering (a poor soldering occurs). In particular, in the terminal arrangement direction, the possibility that the connection reliability decreases as the distance between adjacent terminals becomes narrower.

  In view of the above problems, an object of the present invention is to provide an electronic device that can improve connection reliability.

  In order to achieve the above object, according to the first aspect of the present invention, a plurality of terminals are arranged along the surface of a printed circuit board with respect to a printed circuit board having lands and a main body portion made of an electrically insulating material. An electronic device in which a body portion is disposed on the surface of a printed circuit board, terminals are reflow soldered to the corresponding lands, and the electronic components are mounted on the printed circuit board. A plurality of first lands arranged in a line along the direction, and a plurality of second lands arranged in a line along the arrangement direction of the terminals at a position farther from the main body than the first land, The first land and the second land have a staggered arrangement, and the terminal connected to the second land is substantially parallel to the surface of the printed circuit board and at least a part of the terminal is fixed to the main body. And pudding A first parallel portion and a second parallel portion, which are substantially parallel to the surface of the substrate and are exposed from the main body portion and connected to a mounting portion with a second land at an end portion on the side far from the main body portion; And the first parallel part is entirely disposed in the main body part or the length of the part exposed from the main body part to the land formation side is the second. The length is shorter than the parallel part, and the second parallel part is characterized in that it is positioned closer to the surface of the printed circuit board than the first parallel part in a direction perpendicular to the surface of the printed circuit board.

  Thus, according to the present invention, since the first lands and the second lands are arranged in a staggered manner, the terminals connected to the first lands (connection portions to the first lands) are compared with the configuration in which the first lands and the second lands are arranged in a lattice pattern. ) Is easily supplied with heat during reflow (particularly from the upper surface of the printed circuit board main body). In addition, among the terminals, a parallel portion that is substantially parallel to the surface of the printed circuit board in the conventional electronic device is divided into a first parallel portion and a second parallel portion, and a connection portion to the second land is provided at the tip of the second parallel portion. The second parallel part is located closer to the surface of the printed circuit board than the first parallel part. Therefore, heat at the time of reflow (particularly from the upper surface of the printed circuit board main body) is more easily supplied to the terminals connected to the first lands, thereby improving the connection reliability as compared with the conventional electronic device.

  In addition, among the terminals, parallel portions that are substantially parallel to the surface of the printed circuit board are likely to receive heat from reflow. Therefore, in a conventional electronic device having a long parallel portion extending from the main body, heat received by the parallel portion is transmitted to the main body and may adversely affect the main body (for example, the main body melts). . On the other hand, according to the present invention, all of the first parallel parts are arranged in the main body part, or the length of the part exposed from the main body part is shorter than the second parallel part. The two parallel portions and the first parallel portion are connected by the first connecting portion. Therefore, even if heat is received at the first parallel part, the heat received at the second parallel part is long, and the heat transfer path to the main part is long, so that adverse effects on the main part due to heat during reflow are suppressed. be able to.

  In the present invention, the first land and the second land indicate the lands (lands in different rows) that are different in the direction perpendicular to the terminal arrangement direction and along the surface of the printed circuit board. It is. Accordingly, the plurality of rows of lands are not limited to two rows. For example, in lands arranged in three rows, the land closest to the main body may be the first land, the land farthest from the main body may be the second land, and the land closest to the main body may be the first land. The land in the middle row may be the second land. The land in the middle row may be the first land, and the land farthest from the main body may be the second land.

  In the invention described in claim 1, as described in claim 2, the terminal connected to the first land is substantially parallel to the surface of the printed circuit board, and at least a part thereof is fixed to the main body. The third parallel part is connected to one end, and the third parallel part is connected to one end, and is mounted on the first land directly or through a part that is substantially parallel to the surface of the printed circuit board and exposed from the main body part. It is good to set it as the structure which has the 2nd connection part to which the part was connected.

  In the invention described in claim 2, as described in claim 3, the third parallel portion is positioned farther from the surface of the printed circuit board than the second parallel portion on the same side with respect to the surface of the printed circuit board. It is good to have a configuration.

  With such a configuration, the third parallel portion is closer to the surface of the printed circuit board than the second parallel portion, and the second connecting portion of the terminal connected to the first land is reflowed at the time of reflow. Since it becomes easy to hit with heat, connection reliability can be improved by this.

  In the invention according to claim 2 or claim 3, the first connecting portion and the second connecting portion are substantially perpendicular to the surface of the printed circuit board as described in claim 4, and It is good also as a structure which is arrange | positioned alternately along the sequence direction and was made into the line. Preferably, as described in claim 5, the first connection part and the second connection part are substantially perpendicular to the surface of the printed circuit board and arranged in a line along the arrangement direction of the terminals. A staggered configuration is recommended.

  If it is set as the structure of Claim 5, compared with the structure of Claim 4, the crosstalk which arises in a 1st connection part and a 2nd connection part can be suppressed. Therefore, it is possible to further reduce the physique in the arrangement direction of the terminals by narrowing the interval between the terminals.

  In the invention described in claim 5, the first parallel part and the third parallel part may be arranged in a line in the main body part in a direction perpendicular to the surface of the printed circuit board. As described in claim 6, in the direction perpendicular to the surface of the printed circuit board, the positions of the first parallel portion and the third parallel portion are different from each other, and the first parallel portion is at least one stage higher than the main body portion. It is good to set it as the structure arrange | positioned and the 3rd parallel part at least 1 step | paragraph.

  With such a configuration, the size of the terminals in the arrangement direction of the terminals can be further reduced as compared with the configuration in which the first parallel portion and the third parallel portion are arranged in a row. Note that the number of stages of terminals in the main body may be two or more, that is, at least one stage by the first parallel part and at least one stage by the third parallel part.

  In the invention described in claim 6, as described in claim 7, in the direction perpendicular to the terminal arrangement direction and along the surface of the printed circuit board, of the first connecting part and the second connecting part, The portion of the connecting portion positioned close to the two lands is a portion excluding a portion on the mounting portion side with respect to the land, and is further away from the surface of the printed circuit board than the connecting portion positioned far from the second land. It is preferable that the portion is held by the main body.

  With such a configuration, a part of the connection part closer to the second land (upper region far from the surface of the printed circuit board) of the first connection part and the second connection part is held by the main body part. Therefore, the positional accuracy between the mounting portion of the terminal including the connecting portion and the corresponding land can be improved as compared with the configuration in which the connecting portion is not held by the main body portion. When the connecting portion closer to the second land is the first connecting portion, the first parallel portion is completely disposed in the main body portion, and in the case of the second connecting portion, the third parallel portion is in the main body portion. The configuration is completely arranged.

  Further, among the connecting parts on the side close to the second land, a part on the mounting part side with the land (the lower region on the side close to the surface of the printed circuit board) is not held by the main body part. As compared with the configuration in which all of the above are held by the main body, the stress transmitted to the mounting portion with the land can be relaxed.

  In the case where both the first connecting part and the second connecting part are held by the main body part at the same height, in the configuration in which the terminal is inserted and fixed in the groove provided in the main body part, A groove for disposing a connection portion on the side far from the second land is provided between the connection portions on the near side, and the connection portion on the side close to the second land in the arrangement direction of the terminals, the wall portion by the main body portion It is also possible to adopt a structure in which the groove, the wall portion by the main body portion, and the connecting portion closer to the second land are arranged in order. When the wall portion exists in this way, it is necessary to give the wall portion a predetermined thickness in order to ensure the strength thereof, which becomes a neck when the interval between the terminals is narrowed. On the other hand, according to the present invention, of the connecting portion closer to the second land, the upper region is held by the main body portion than the connecting portion positioned far from the second land, The above-described wall portion does not exist. Therefore, it is possible to further reduce the physique in the arrangement direction of the terminals by narrowing the interval between the terminals.

  In the invention described in claim 6 or claim 7, as described in claim 8, the first parallel portion may be positioned farther from the surface of the printed circuit board than the third parallel portion.

  With such a configuration, the heat transfer path from the second parallel portion to the first parallel portion becomes longer, and the adverse effect on the main body due to heat during reflow can be effectively suppressed.

  In the invention described in claim 8, as described in claim 9, in the direction perpendicular to the terminal arrangement direction and along the surface of the printed circuit board, the first connecting portion is second than the second connecting portion. It is preferable that the position be close to the land.

  With such a configuration, it is possible to effectively suppress crosstalk that occurs between the terminal connected to the first land and the terminal connected to the second land adjacent to the terminal. Therefore, it is possible to further reduce the physique in the arrangement direction of the terminals by further reducing the interval between the terminals.

  In the invention according to claim 9, as described in claim 10, the second connecting portion relaxes the stress between the third parallel portion and the mounting portion of the first land. It is good also as a structure which has.

  With such a structure, the length of the portion extending from the main body portion acts on the connection portion between the land and the terminal in the terminal connected to the first land shorter than the terminal connected to the second land. The stress can be relieved at the stress relieving part, and thereby the reliability of the connecting part can be improved.

  In the invention according to claim 4 or claim 5, as in claim 11, the positions of the first parallel portion and the third parallel portion are different from each other in the direction perpendicular to the surface of the printed circuit board. The first parallel part is arranged at least one stage relative to the main body part, the third parallel part is arranged at least one stage, and the third parallel part is located farther from the surface of the printed circuit board than the first parallel part. It is good also as a structure.

  With such a configuration, the length of the portion extending from the main body portion of the terminal connected to the first land is made longer than that of the configuration according to claim 8, and the terminal connected to the second land and the first With the terminals connected to the lands, the lengths of the portions extending from the main body can be made close to each other. Thereby, it is possible to improve the reliability of the connection part between the first land and the corresponding terminal.

  Further, as compared with the configuration according to the eighth aspect, since the heat at the time of reflow is easily applied to the second connecting portion, it is possible to improve the connection reliability.

  In the invention according to any one of claims 1 to 11, the configuration of the terminal connected to the first land and the terminal connected to the second land is particularly limited as long as it is reflow mounted. is not. For example, as described in claim 12, at least one of a terminal connected to the first land and a terminal connected to the second land is substantially perpendicular to the surface of the printed board and provided on the printed board. A terminal having at least an insertion portion that is reflow soldered to a corresponding land provided around the wall surface and the opening of the through hole in a state of being inserted into the through hole can be employed. In addition to the above, a terminal having only a surface portion that is substantially parallel to the surface of the printed circuit board may be employed.

  In the twelfth aspect of the invention, as described in the thirteenth aspect, in the land corresponding to the terminal having the insertion portion, the size of the peripheral portion of the opening along the surface of the printed circuit board is the terminal having the insertion portion. A configuration in which the main body portion arrangement surface side is made larger than the rear surface side of the arranged main body portion arrangement surface is preferable.

  With such a configuration, since the size of the land is small on the back surface of the main body portion arrangement surface of the printed circuit board, it can be used for mounting different electronic components accordingly.

  In a thirteenth aspect of the present invention, as described in the fourteenth aspect, among the lands corresponding to the terminals having the insertion portion, the size of the back surface side of the main body portion arrangement surface is a portion around the opening. A configuration in which the maximum tolerance of the hole diameter is made larger is preferable.

  With such a configuration, when the reflow is performed from the back surface side of the main body portion arrangement surface (including the case where the reflow is performed from both surfaces), the amount of heat received by the land increases, so that the connection reliability can be improved.

  In the invention according to any one of claims 12 to 14, as described in claim 15, the terminal is connected to the insertion portion and the insertion portion, and is substantially parallel to the surface of the printed circuit board. The surface portion as a mounting portion with the land, and in the state where the insertion portion is inserted into the through hole provided in the printed circuit board, the surface portion and the corresponding land provided around the wall surface of the through hole and the opening The insertion portion includes a branched terminal to be reflow soldered, and in a direction perpendicular to the terminal arrangement direction and along the surface of the printed circuit board, the insertion portion is located farther from the main body portion than the surface portion, or on the surface portion. It is also possible to adopt a configuration that is positioned between both ends.

  With such a configuration, compared to a configuration in which the insertion portion is positioned closer to the main body than the surface portion, heat during reflow easily hits the insertion portion (the reflow heat is prevented from being blocked by the surface portion). As a result, the connection reliability can be improved.

  In addition, a branched terminal is adopted as at least one of the terminal connected to the first land and the terminal connected to the second land, and both the insertion portion and the surface portion are reflow-mounted, so that the large size of the land on the printed circuit board surface It is possible to secure a contact area between the terminal (land) and the solder, which is sufficient to satisfy the desired connection reliability while suppressing the formation.

  Moreover, since the insertion part arrange | positioned in a through-hole exhibits the effect of positioning, in the state (a solder is a molten state) before a terminal and a land are electrically connected, between a terminal and a corresponding land Misalignment can be prevented. That is, connection reliability can be improved as compared with the configuration of only the surface portion.

  If the position of the insertion portion is between both ends of the surface portion (substantially T-shaped), on the surface portion, solder fillets (side fillets) are formed at both end portions sandwiching the insertion portion therebetween, As a result, an increase in contact area and an increase in connection reliability against stress in the surface direction of the printed circuit board can be expected. Further, if the misalignment angle with the insertion portion as the rotation center is the same, the misalignment amount can be made smaller than the configuration in which the insertion portion is located farther from the main body than the surface portion (inverted L shape). Thus, connection reliability and mounting density can be improved.

  In the invention described in claim 15, as described in claim 16, it is preferable that the insertion portion has a central position with respect to both ends of the surface portion.

  With such a configuration, it is possible to further reduce the amount of positional deviation between the surface portion having the insertion portion as the rotation center and the corresponding land. In addition, since the variation in the amount of solder flowing from the symmetrical position sandwiching the through-holes between the peripheral portions of the through-holes in the land is reduced, good solder fillets can be formed at both ends of the surface portion. Furthermore, heat at the time of reflow is uniformly transmitted from the symmetrical position sandwiching the through-holes to the insertion portion, and variations in the connection state between each symmetrical position and the corresponding surface portion can be reduced.

  In the invention according to claim 15 or claim 16, as described in claim 17, with the tip of the insertion portion inserted into the through hole, the same position as the back surface of the main body portion arrangement surface, or It is good also as a structure made into the position between an electronic component arrangement | positioning surface and its back surface.

  With such a configuration, the amount of solder on the peripheral portion of the opening of the through hole of the land flows into the through hole by capillarity, compared to a configuration in which the tip of the insertion portion protrudes to the back side of the body portion arrangement surface. Can be reduced. That is, a good fillet is easily formed on the surface portion, and the risk of voids occurring in the solder in the through hole is reduced, so that connection reliability can be improved while suppressing the increase in size of the land on the printed circuit board surface. .

  Further, since the insertion portion does not block heat when reflowing the back surface of the main body portion arrangement surface of the printed circuit board, connection reliability of other electronic components and the like can be improved.

  Moreover, in invention of any one of Claims 12-16, like the 18th aspect, in the state which the front-end | tip of the insertion part was inserted in the through-hole, it is in the back surface side of a main-body part arrangement | positioning surface. It is good also as a protruding structure.

  With such a configuration, when reflowing from the back side of the main body part arrangement surface (including the case of reflowing from both sides), reflow heat is generated at the portion protruding to the back side of the main body part arrangement surface of the insertion part. Since it can receive, the connection reliability of the terminal which has an insertion part can be improved.

  In the invention described in any one of claims 12 to 18, as described in claim 19, as the main body portion, terminals arranged on one surface of the printed board and connected to the first land are arranged. A first body portion; and a second body portion arranged on the back surface of the printed circuit board on which the first body portion is disposed and arranged with terminals connected to the second lands. As a main body corresponding to the terminal connected to the first land and the terminal connected to the second land in a state where the tip of the insertion part of one terminal is inserted into the through hole. The same position as the back surface of the arrangement surface of the part, or a position between the main body part arrangement surface and the back surface, and the tip of the insertion part of the other terminal protrudes to the back side of the corresponding arrangement surface of the main body part And good.

  With such a configuration, if the solder is arranged on the peripheral portion of the opening of the through hole of the land in the main body arrangement surface where the terminals whose front ends do not protrude are arranged on the back side of the main body arrangement surface, the main body arrangement surface The effect similar to that of the invention according to the fifteenth aspect can be expected in the terminal whose tip does not protrude from the back surface side of the connector. In addition, in the terminal whose tip protrudes on the back surface side of the main body portion arrangement surface, the solder arranged on the peripheral portion of the opening can be drawn between the through-hole wall surface and the insertion portion by at least capillary action.

  Further, the first main body portion and the second main body portion may be integrated by fitting or the like.

  In the invention described in claim 19, as described in claim 20, the tip of the insertion portion of the terminal connected to the first land is inserted into the through hole and the back surface of the first main body portion arrangement surface The same position or a position between the first main body portion arrangement surface and the back surface thereof, and the tip of the insertion portion of the terminal connected to the second land is protruded to the back surface side of the second main body portion arrangement surface It is preferable that

  With such a configuration, when reflowing from the back side of the solder placement surface, the reflow heat from the terminal connected to the second land to the terminal connected to the first land (connection portion with the first land). It is possible to reduce the influence on the connection reliability due to the hindering.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, a connector is shown as an example of an electronic component, and an electronic control device in which a connector is mounted on a printed board is shown as an example of an electronic apparatus in which the electronic component is mounted on a printed board.
(First embodiment)
FIG. 1 is an exploded view illustrating a schematic configuration of the electronic control device according to the first embodiment of the present invention before assembly. FIG. 2 is a plan view of the periphery of the mounting portion in a state where the connector is mounted on the printed board. FIG. 3 is a plan view of a state in which the connector is mounted on the printed circuit board as viewed from the connection side between the printed circuit board and the terminals. FIG. 4 is a plan view of the state in which the connector is mounted on the printed circuit board as viewed from the connection side with the external connector. FIG. 5 is an enlarged plan view of the area surrounded by the broken line in FIG. 2 on the housing arrangement surface side. FIG. 6 is an enlarged plan view of a housing arrangement surface of the printed circuit board in a region surrounded by a broken line in FIG. FIG. 7 is an enlarged plan view showing the back side of the housing arrangement surface of the printed circuit board in the region surrounded by the broken line in FIG. 2. 8 is a cross-sectional view taken along line VIII-VIII shown in FIG. Fig.9 (a) is typical sectional drawing which follows the IX-IX line | wire of FIG. 8, FIG.9 (b) is typical sectional drawing which shows the comparative example of (a). In FIG. 5, for convenience, electronic components other than the solder and the connector are omitted. 6 and 7, the solder and solder resist are omitted for convenience.

  The electronic control device shown in the present embodiment is a non-waterproof electronic control device, and is used, for example, as an engine ECU (Electric Control Unit) of a vehicle.

  An electronic control device 1 shown in FIG. 1 corresponds to the electronic device described in the claims, and as a main part, a circuit board 30 in which an electronic component 32 is mounted on a printed circuit board 31, and a claim It corresponds to the electronic component described in the scope, and mainly includes a housing 60 and a connector 50 having a terminal 70 having a mounting portion to be reflow soldered. In addition to the components described above, the present embodiment includes a housing 10 that houses the circuit board 30 and the connector 50. For such an electronic control device, the basic configuration and the manufacturing method are the same as those of Japanese Patent Application No. 2007-000888 by the present applicant.

  The housing 10 is made of a metal material such as aluminum or iron, or a synthetic resin material, and accommodates the circuit board 30 and a part of the connector 50. The number of constituent members of the housing 10 is not particularly limited, and may be configured from one member or a plurality of members. In the present embodiment, as shown in FIG. 1, it is constituted by two members, a box-shaped case 11 with one side opened and a shallow cover 12 with a substantially rectangular plate shape that closes the open surface of the case 11. Is done. Then, the case 10 having the internal space for accommodating the circuit board 30 and the connector 50 is configured by assembling the case 11 and the cover 12. The housing 10 (case 11) is provided with a connector notch (not shown) corresponding to the connector 50, and the case 11 and the cover 12 are screwed together (not shown) so as to accommodate the circuit board 30. In a state of being omitted, a part of the circuit board 30 and the connector 50 (including the connection side of the terminal 70 to the circuit board 30) is accommodated in the housing 10, and the remaining part of the connector 50 (the external connector of the terminal 70). Is exposed to the outside of the housing 10.

  As shown in FIG. 1, the circuit board 30 has a printed circuit board 31 formed with wiring including lands as electrodes, via holes connecting the wirings, and the like, and electronic components 32 such as a microcomputer, a power transistor, a resistor, and a capacitor. Is implemented. In the present embodiment, a connector 50 that electrically connects the circuit board 30 and the outside is mounted on the printed board 31 as one of the electronic components 32. The printed circuit board 31 is provided with a plurality of lands to which the mounting portions of the terminals 70 are reflow soldered along the arrangement direction of the terminals 70 with respect to the housing 60. The lands are provided in a plurality of rows in a direction perpendicular to the arrangement direction of the terminals 70 and along the housing placement surface of the printed circuit board 31. The lands in each row are arranged in a staggered manner.

  The number of rows (stages) of staggered rows by lands is not particularly limited. In this embodiment, as a land, as shown in FIGS. 5 to 7, a plurality of first lands 34 arranged in a line along the arrangement direction of the terminals 70, and the housing 60 is separated from the first land 34. And a plurality of second lands 35 arranged in a line along the arrangement direction of the terminals 70 at a position (a position away from one end face of the printed circuit board 31). The first land 34 and the second land 35 have a two-stage staggered arrangement. With such a configuration, compared to a configuration in which the first land 34 and the second land 35 are arranged in a row, the side fillet formed on the side surface of the terminal 70 can be increased in the arrangement direction of the terminals 70. As a result, connection reliability can be improved. Further, in the arrangement direction of the terminals 70, the printed circuit board 31 can be made smaller, and thus the electronic control device 1 can be made smaller. Further, the pattern of the wiring 36 drawn from each land 34, 35 can be simplified as compared with the configuration in which the first land 34 and the second land 35 are arranged in a grid pattern. Further, as shown in FIGS. 6 and 7, an electronic component 32 other than the connector 50 can be disposed in the vicinity of the lands 34 and 35. As the electronic component 32 disposed in the vicinity of each land 34, 35, a surge absorbing capacitor, a phase fixing resistor, or the like is effective. Further, as will be described later, the lands 34 and 35 (especially the first land 34 close to the housing 60 (one end surface of the printed circuit board 31)) are likely to receive heat during reflow, thereby improving connection reliability. Can be improved. 6 and 7 is a land to which the electronic component 32 is reflow soldered.

  The first land 34 and the second land 35 are provided on the wall surface of the through-hole 33 that penetrates the arrangement surface of the housing 60 of the printed circuit board 31 and the back surface thereof and the periphery of the opening according to the mounting portion of the terminal 70 described later. . Specifically, as shown in FIGS. 5 to 8, the lands 34 and 35 are provided on the housing arrangement surface of the printed circuit board 31 around the opening of the through hole 33, and a part of the mounting portion of the corresponding terminal 70. Are provided on the wall surfaces of the through holes 33 and the surface portions 34a and 35a to be reflow soldered, and the wall surface portions 34b to be reflow soldered in a state where part of the mounting portions of the corresponding terminals 70 are inserted into the through holes 33. , 35b, and back surface portions 34c, 35c provided around the opening of the through-hole 33 and on the back surface of the housing arrangement surface of the printed circuit board 31, respectively. The front surface portion 34a, the wall surface portion 34b, and the back surface portion 34c are integrated as the first land 34, and the front surface portion 35a, the wall surface portion 35b, and the back surface portion 35c are integrated as the second land 35. In addition, in this embodiment, although the surface parts 34a and 35a and the wall surface parts 34b and 35b are integrated (connected), the surface parts 34a and 35a and the wall surface parts 34b and 35b are not integrated, A structure in which a solder resist is interposed (electrically separated structure) may be employed. These configurations are described in Japanese Patent Application No. 2007-000888 filed by the present applicant.

  The form of the lands 34 and 35 provided around the wall surface of the through hole 33 and the opening is not particularly limited. In the present embodiment, the through hole 33 is located at the center of the planar rectangular surface portions 34a and 35a. With such a configuration, as will be described later, the solder disposed on the surface portions 34a and 35a flows into the through-hole 33 evenly from the symmetrical position sandwiching the through-hole 33 during reflow. A good solder fillet can be formed on the mounting portion of the terminal 70 that is disposed opposite to each symmetrical position. Further, heat at the time of reflow is evenly transmitted from the symmetric position to the mounting portion of the terminal 70 disposed in the through hole 33, and variations in the connection state between each symmetric position and the mounting portion of the terminal 70 can be reduced. Further, in the first land 34 and the second land 35, the front surface portions 34a and 35a are larger than the back surface portions 34c and 35c. With such a configuration, the back surface portions 34c and 35c are larger than the front surface portions 34a and 35a, or compared with a configuration in which both are equal, the mounting prohibited area of the electronic component 32 on the back surface of the housing arrangement surface of the printed circuit board 31 is increased. As a result, the size of the printed circuit board 31 can be reduced.

  The shape and size of the through hole 33 may be set as appropriate according to the terminal 70 (diameter of the mounting portion) inserted into the through hole 33. In the present embodiment, as shown in FIGS. 5 to 7, the printed circuit board 31 includes a through hole 33 having a small diameter corresponding to the terminals 73 to 76 having a small diameter, and a terminal 71 having a diameter larger than the terminals 73 to 76. , 72 and two types of through-holes 33 with different diameters. In this embodiment, the terminals 73 to 76 having a small diameter are signal terminals for signal transmission, and the terminals 71 and 72 having a large diameter are power terminals for power transmission. Therefore, not only the size of the through-hole 33 but also the size of the surface portions 34a and 35a and the width of the wiring 36 are set according to the amount of current flowing.

  The connector 50 has a plurality of terminals 70 made of a conductive material and a printed circuit board 31 with respect to a housing 60 (corresponding to a main body described in claims) made of an electrically insulating material (resin in this embodiment). It is arranged along the surface. In the terminal 70, one end portion (mounting portion) extending from the housing 60 is reflow soldered to the corresponding lands 34 and 35, and the other end portion extending from the housing 60 is outside the housing 10. Any structure that is exposed and electrically connected to the external connector can be employed. As such a terminal 70, a metal plate is punched into a predetermined shape bent in advance, and a so-called punched terminal integrated with the housing 60 by insert molding, or a rod-shaped terminal member punched from a metal plate is used as a housing. A so-called bending terminal, which is inserted into the hole provided in 60 and then bent, can be employed.

  In this embodiment, all the terminals 70 are punched terminals made of brass plated with metal, and a part of each terminal 70 is held by the housing 60 so as not to interfere with each other, as shown in FIGS. Are arranged along the longitudinal direction of the flat rectangular housing 60. Thus, when a punched terminal is employed as the terminal 70, the width of each terminal 70 in the arrangement direction of the terminals 70 (longitudinal direction of the housing 60) can be determined by the thickness of the metal plate. By appropriately selecting the length, the stress caused by the warp of the printed circuit board 31 and the housing 60 in the longitudinal direction of the housing 60 can be relaxed by the spring property of the terminal 70, and the stress acting on the solder connection portion can be reduced.

  In addition, as described above, in the present embodiment, the terminals 70 include the power terminals 71 and 72 and the signal terminals 73 to 76. Among the terminals 71 to 76, the terminals 71, 73, and 75 are connected to the first land 34 on the side close to the housing 60, and the terminals 72, 74, and 76 that are higher than the terminals 71, 73, and 75 are the housings. 60 is connected to the second land 35 on the side far from 60.

  Terminals 70 (71, 73, 75) connected to the first land 34 are substantially parallel to the housing arrangement surface of the printed circuit board 31 and at least partially fixed to the housing 60, and at one end. The third parallel portion is connected, and the mounting portion with the first land 34 is connected to the other end directly or through a portion that is substantially parallel to the housing placement surface of the printed circuit board 31 and exposed from the housing 60. What is necessary is just to have a 2nd connection part. For example, as shown in FIG. 8, the power terminal 71 connected to the first land 34 is substantially parallel to the housing placement surface of the printed circuit board 31, and is placed and fixed in the housing 60. A third parallel portion 71a that is connected to the housing 60 and slightly protrudes from the housing 60 to the land 34, 35 formation side, the third parallel portion 71a is connected to the upper end, and the first land 34 is mounted to the lower end. The surface mounting portion 71d and the insertion mounting portion 71e are connected to each other directly and the second connecting portion 71b. The other end of the third parallel part 71a to which the second connecting part 71b is connected is exposed from the housing 60 to the side opposite to the side where the lands 34 and 35 are formed, and is connected to an external connector. The connected parts are connected. Although not shown, the signal terminals 73 and 75 connected to the first land 34 have the same configuration as the power terminal 71.

  The terminals 70 (72, 74, 76) connected to the second land 35 are substantially parallel to the housing arrangement surface of the printed circuit board 31 and at least a part of the first parallel part fixed to the housing 60, and A second parallel portion that is substantially parallel to the housing placement surface of the printed circuit board 31 and is exposed from the housing 60 and connected to the mounting portion of the second land 35 at the end far from the housing 60; And a first connecting part that connects the second parallel part. Further, the first parallel portion is all disposed in the housing 60, or the length of the portion exposed from the housing 60 to the formation side of the lands 34, 35 is shorter than the second parallel portion. The second parallel portion may be positioned closer to the housing placement surface of the printed circuit board 31 than the first parallel portion in the direction perpendicular to the housing placement surface of the printed circuit board 31. For example, as shown in FIG. 8, the power terminal 72 connected to the second land 35 is substantially parallel to the housing arrangement surface of the printed circuit board 31 and is arranged and fixed in the housing 60. The first parallel portion 72a that is connected and protrudes from the housing 60 to the formation side of the lands 34 and 35 is substantially parallel to the housing placement surface of the printed circuit board 31 and is exposed from the housing 60 and exposed from the housing 60. A second parallel portion 72c in which a surface mounting portion 72d and an insertion mounting portion 72e, which are mounting portions with respect to the second land 35, are connected to the far end portion, the first parallel portion 72a is connected to the upper end, and the first parallel portion 72a is connected to the lower end. It has the structure which has the 1st connection part 72b which connects the 2 parallel parts 72c. The first parallel portion 72a has a portion exposed from the housing 60 on the side where the lands 34 and 35 are formed, shorter than the second parallel portion 72c, and the second parallel portion 72c is the printed circuit board 31. In a direction perpendicular to the housing arrangement surface, the position is closer to the housing arrangement surface of the printed circuit board 31 than the first parallel portion 72a. The other end of the first parallel part 72a to which the first connecting part 72b is connected is exposed from the housing 60 to the side opposite to the side where the lands 34 and 35 are formed, and is connected to an external connector. The connected parts are connected. Although not shown, the signal terminals 74 and 76 connected to the second land 35 have the same configuration as the power terminal 72.

  Furthermore, in the terminal 70 (71, 73, 75) connected to the first land 34 and the terminal 70 (72, 74, 76) connected to the second land 35, the first connecting portion 72b and the second connecting portion. 71b are substantially perpendicular to the housing arrangement surface of the printed circuit board 31, and are alternately arranged along the arrangement direction of the terminals 70 to form a line. Further, the third parallel portion 71a is positioned farther from the housing arrangement surface of the printed circuit board 31 than the second parallel portion 72c on the same side with respect to the housing arrangement surface of the printed circuit board 31.

  The number of stages of the terminals 70 (71 to 76) with respect to the housing 60 in the direction perpendicular to the housing arrangement surface of the printed circuit board 31 is not particularly limited. The physique in the direction can be further reduced. In the present embodiment, as shown in FIGS. 3, 4, and 8, the terminals 70 are arranged in multiple stages in a direction perpendicular to the surface of the printed circuit board 31 with respect to the housing 60. More specifically, the power terminals 71 and 72 are arranged in two stages in the order of the power terminal 71 and the power terminal 72 from the printed board 31 side with respect to the housing 60. As shown in FIG. 4, the power terminals 71 and the power terminals 72 are staggered with respect to the housing 60. The signal terminals 73 to 76 are arranged in four stages in the order of the signal terminal 73, the signal terminal 75, the signal terminal 74, and the signal terminal 76 from the printed circuit board 31 side with respect to the housing 60. Then, in the arrangement direction of the terminals 70, as shown in FIG. Further, for example, as shown in FIG. 8, the first parallel portion 72 a of the terminal 70 (72, 74, 76) connected to the second land 35 is connected to the terminal 70 (71, 73) connected to the first land 34. , 75) is located farther from the housing arrangement surface of the printed circuit board 31 than the third parallel part 71a. The configuration of the terminal 70 is a main characteristic part of the present embodiment, and the effect will be described later.

  The mounting portion of the terminal 70 is not particularly limited as long as the terminal 70 is reflow soldered to the corresponding lands 34 and 35. For example, a so-called surface mounting structure in which the mounting portion is substantially parallel to the surface of the printed circuit board 31 may be used, or an insertion that is substantially perpendicular to the surface of the printed circuit board 31 and is inserted into the through hole of the printed circuit board 31. A mounting structure may be used. In the present embodiment, each terminal 70 is configured as a branch terminal having both the surface mounting portions 71d and 72d having the surface mounting structure and the insertion mounting portions 71e and 72e having the insertion mounting structure as described above as the mounting portions. Yes. Then, the surface mounting portions 71 d and 72 d of the terminal 70 are arranged to face each other on the surface portions 34 a and 35 a of the corresponding lands 34 and 35, and are mechanically and electrically connected via the solder 90. In addition, in a state where the insertion mounting portions 71e and 72e of the terminal 70 are inserted into the corresponding through-holes 33, mechanical and electrical via at least the wall surface portions 34b and 35b of the corresponding lands 34 and 35 and the solder 90. Connected.

  When such a configuration is adopted, the insertion mounting portions 71e and 72e of the terminal 70 are disposed in the corresponding through holes 33 of the printed circuit board 31, and are perpendicular to the thickness direction of the printed circuit board 31. The positioning effect can be exhibited. Therefore, even if deformation such as warpage occurs in at least one of the printed circuit board 31 and the housing 60 during reflow due to the difference in linear expansion coefficient between the printed circuit board 31 and the housing 60 of the connector 50, for example, Can be secured. In addition, the insertion mounting portions 71e and 72e are electrically and mechanically connected to the corresponding wall surfaces 34b and 35b of the lands 34 and 35 via the solder 90 in a state where a part thereof is disposed in the through hole 33. Has been. Therefore, even if the number of the terminals 70 in the longitudinal direction of the housing 60 is large, the coplanarity between the surface mounting portions 71d and 72d and the corresponding surface portions 34a and 35a of the lands 34 and 35 can be secured. Therefore, a contact area between the terminal 70 (land 34, 35) and the solder 90 sufficient to satisfy the desired connection reliability can be ensured. That is, connection reliability can be improved as compared with a configuration in which the mounting portion has a surface mounting structure. In particular, in the present embodiment, since all the terminals 70 are branched terminals, connection reliability can be further improved.

  Further, in the present embodiment, the terminals 70 (72, 74, 76) connected to the second land 35 are perpendicular to the arrangement direction of the terminals 70, for example, as shown in FIG. The surface mounting portion 72d extends in a direction away from the housing 60 from the tip of the second parallel portion 72c. In addition, in the terminals 70 (71, 73, 75) connected to the first land 34, as shown in FIG. The surface mounting portion 71d extends in a direction away from the housing 60 from the lower end of the two connecting portions 71b. Therefore, the reflow heat is easily applied to the mounting portion.

  Further, in the present embodiment, the mounting portion of the terminal 70 in the direction perpendicular to the arrangement direction of the terminals 70 and along the surface of the printed circuit board 31 is the surface mounting portions 71d and 72d, the insertion mounting portions 71e and 72e, and the surface. The mounting parts 71d and 72d are configured in this order. That is, it has a substantially T-shaped structure. When such a substantially T-shaped terminal 70 is employed, in a configuration in which the terminal 70 includes the surface mounting portions 71d and 72d and the insertion mounting portions 71e and 72e, the insertion mounting portions 71e and 72e are formed by the surface mounting portions 71d and 72d. Compared to the configuration close to the housing 60 (so-called saddle structure), the heat blocked by the surface mounting portions 71d and 72d during reflow is suppressed, and the insertion mounting portions 71e and 72e (and the corresponding wall surface portion 34b). , 35b), heat is easily transmitted. As a result, connection reliability can be improved. The same effect can be expected even when the insertion mounting portions 71e and 72e are positioned farther from the housing 60 than the surface mounting portions 71d and 72d (so-called inverted L-shaped structure). In the present embodiment, in all the terminals 70, the insertion mounting portions 71e and 72e are positioned at the center with respect to both ends of the surface mounting portions 71d and 72d. Therefore, since heat at the time of reflow is evenly transferred from the surface mounting portions 71d and 72d sandwiching the insertion mounting portions 71e and 72e to the insertion mounting portions 71e and 72e (connection portions with the wall surface portions 34b and 35b), the surface mounting portion Variations in the connection state between the surface portions 34a and 35a facing the surfaces 71d and 72d can be reduced.

  In addition to the above, various effects other than the above can be considered by the effect of the terminal 70 having a substantially T-shaped structure (effect compared with the structure in which the insertion mounting portions 71e and 72e are provided at the longitudinal ends of the surface mounting portions 71d and 72d). . Since these effects are described in detail in Japanese Patent Application No. 2007-000888 by the present applicant, detailed description is omitted in the present embodiment. For example, if the size in the direction perpendicular to the thickness direction of the printed circuit board 31 is the same, the mounting density of the electronic components 32 can be further improved with the substantially T-shaped structure. Further, even if a positional shift due to rotation about the insertion mounting portions 71e and 72e occurs, the surface mounting portions 71d and 72d are less likely to protrude from the surface portions 34a and 35a in the substantially T-shaped structure, and connection reliability (quality) Easy to secure. Further, even when the surface is inclined with respect to the surface of the printed circuit board 31, the substantially T-shaped structure is easy to ensure connection reliability (quality). Further, even if the solder 90 on the surface portions 34a and 35a flows into the through hole 33 at the time of reflow, the solder thickness on the surface portions 34a and 35a facing each other with the substantially T-shaped structure sandwiching the through hole 33 is substantially equal. It is easy to ensure connection reliability (quality) by keeping the thickness. Further, the substantially T-shaped structure can take more side fillets in the surface mounting portions 71d and 72d, thereby improving the connection reliability.

  In the present embodiment, the housing arrangement of the printed circuit board 31 with all the terminals 70 inserted into the corresponding through-holes 33 as shown in FIG. 8, for example, as shown in FIG. It is a position between the surface and the back surface. With such a configuration, since the length of the insertion mounting portions 71e and 72e facing the wall surfaces (wall surface portions 34b and 35b) of the through-hole 33 is short, the surface portions 34a and 35a of the lands 34 and 35 at the time of reflow. The amount of the solder 90 applied thereon that flows into the through-hole 33 due to gravity or capillary action can be reduced as compared with a configuration in which the distal ends of the insertion mounting portions 71e and 72e protrude to the back side of the housing arrangement surface. . Therefore, the solder 90 on the surface portions 34 a and 35 a is secured, and good fillets are easily formed on the surface mounting portions 71 d and 72 d of the terminal 70. Further, the risk of voids occurring in the solder 90 in the through hole 33 is reduced. By these, connection reliability can be improved, suppressing the enlargement of the lands 34 and 35 (surface part 34a, 35a) in the surface of the printed circuit board 31. FIG. Further, when the back surface of the housing arrangement surface of the printed circuit board 31 is reflowed, the insertion mounting portions 71e and 72e do not block heat, so that the connection reliability of other electronic components 32 and the like can be improved. Note that the same effect as described above can be expected even when the distal ends of the insertion mounting portions 71e and 72e are in the same position as the rear surface of the housing arrangement surface of the printed circuit board 31.

  As shown in FIGS. 2 to 4, the connector 50 including such terminals 70 includes a terminal block 51 in which only a plurality of signal terminals 73 to 76 are collected in the longitudinal direction of the housing 60, and a plurality of signal terminals 73. ˜76 and a terminal block 52 in which a plurality of power terminals 71 and 72 are collected are respectively provided as terminal blocks used for connection to an external connector. In this embodiment, it is connected to three external connectors that are electrically connected to each engine-related system, and has one terminal block 51 and two terminal blocks 52 as terminal blocks provided for this connection. ing. As shown in FIG. 4, the terminal blocks 51 and 52 are separated by the housing 60 on the connection side with the external connector. Therefore, the warp of the housing 60 can be reduced in the longitudinal direction of the housing 60. In addition, since arrangement | positioning of the several terminal block and arrangement | positioning of the terminal 70 in a terminal block are described in Japanese Patent Application No. 2007-000888 by this applicant, detailed description in this embodiment is abbreviate | omitted.

  2 and 3 is a reinforcing pin for improving the connection reliability of the connector 50 to the printed circuit board 31. In the present embodiment, the reinforcing pins 53 are provided at a plurality of locations (four locations) spaced apart from each other in the longitudinal direction of the housing 60 to enhance the reinforcing effect. However, in this embodiment, since the terminal 70 has the surface mounting portions 71d and 72d and the insertion mounting portions 71e and 72e as mounting portions for the corresponding lands 34 and 35, the configuration without the reinforcing pin 53 is adopted. In addition, connection reliability can be ensured.

  The electronic control device 1 configured as described above mainly has the following effects. First, in the present embodiment, since the first lands 34 and the second lands 35 are arranged in a staggered manner, the terminals 71, 73, 75 ( In particular, the reflow heat from above the housing arrangement surface of the printed circuit board 31 is likely to hit the mounting portion).

  Further, the terminal 70 (72, 74, 76) connected to the second land 35 is connected in the order of the first parallel portion 72a, the first connecting portion 72b, and the second parallel portion 72c. Of the first parallel portion 72a and the second parallel portion 72c that are substantially parallel to the housing placement surface, the second parallel portion 72c is disposed in the housing of the printed circuit board 31 more than the first parallel portion 72a as shown in FIG. The position is close to the surface. On the other hand, in the conventional electronic control apparatus, for example, as shown in FIG. 9B, the first parallel part 72a and the second parallel part 72c are connected to form one parallel part, and the second parallel part is provided. The first connection part 72b is connected to the other end of the connection end of the part 72c with the first parallel part 72a, and the mounting part is provided at the lower end of the first connection part 72b. Accordingly, as shown in FIGS. 9A and 9B in the range between the alternate long and short dash lines, the mounting portion (surface mounting portion 71d) of the terminal 70 (71) connected to the first land 34 (surface portion 34a). On the other hand, the configuration shown in the present embodiment (the configuration shown in FIG. 9A) has a wider range of reflow heat supplied from above the housing arrangement surface of the printed circuit board 31 without being blocked by the second parallel portion 72c. Obviously you can. In FIG. 9B, for convenience, the same reference numerals are given to the same components as in the present embodiment.

  Thus, according to the electronic control device 1 according to the present embodiment, the terminal 70 (71, 71) connected to the first land 34 close to the housing 60 by the effect of the staggered arrangement and the effect of the second parallel portion 72c described above. 73, 75) is also efficiently applied to the mounting portions 71d, 71e (connection portions with the corresponding lands 34). Therefore, it is possible to suppress connection failure due to heat shortage and improve connection reliability.

  In addition, the parallel portion of the terminal 70 that is substantially parallel to the housing arrangement surface of the printed circuit board 31 is more likely to receive reflow heat from above the housing arrangement surface of the printed circuit board 31 than the vertical portion. Therefore, in the conventional electronic control device 1 in which the parallel part extended from the housing 60 is long, the heat received by the parallel part may be transmitted to the housing 60 and have an adverse effect (for example, the resin housing 60 may melt). there were. On the other hand, in the present embodiment, as shown in FIG. 8, the first parallel portion 72 a is all disposed in the housing 60, or the length of the portion exposed from the housing 60 is the second. The length is shorter than the parallel portion 72c, and the second parallel portion 72c and the first parallel portion 72a are connected by the first connecting portion 72b. Therefore, even if heat is received by the first parallel part 72a, the heat received by the second parallel part 72c has a long heat transfer path to the housing 60. Can be suppressed.

  In the present embodiment, as shown in FIG. 8, the first parallel portion 72a is positioned farther from the housing arrangement surface of the printed circuit board 31 than the third parallel portion 71a, and thereby the second parallel portion. The heat transfer path from the part 72c to the first parallel part 72a is long. Therefore, an adverse effect on the housing 60 due to heat during reflow can be effectively suppressed.

  In the present embodiment, as shown in FIG. 8, the third parallel portion 71 a of the terminal 70 (71, 73, 75) connected to the first land 34 is relative to the housing arrangement surface of the printed circuit board 31. On the same side, it is located farther from the housing arrangement surface of the printed circuit board 31 than the second parallel portion 72c. In other words, compared to the configuration in which the third parallel portion 71a is positioned closer to the housing placement surface of the printed circuit board 31 than the second parallel portion 72c, the terminals 70 (71, 73, 71) connected to the first land 34 are used. 75), the second connecting portion 71b is also easily exposed to heat during reflow. Therefore, connection reliability can be further improved.

  In addition, the electronic control apparatus 1 comprised in this way can be formed with the manufacturing method shown below, for example. FIG. 10 is a diagram illustrating a coating process that is a characteristic part of the manufacturing process of the electronic control device, where (a) is a first process of the coating process, (b) is a second process of the coating process, ( c) shows the state after the coating process is completed. FIG. 11 is a plan view showing the positional relationship between the lands connected to the terminals and the openings corresponding to the lands of the screen used in the coating process. Various methods described in Japanese Patent Application No. 2007-000888 by the present applicant can be adopted as a method for manufacturing the electronic control device 1 described above, and an example thereof will be shown below.

  In manufacturing the electronic control device 1, first, the printed circuit board 31 having the above-described configuration and the connector 50 having the above-described configuration are prepared using a known manufacturing method. For example, the through-hole 33 is formed at a position corresponding to the insertion mounting portions 71e and 72e of the terminal 70 on the printed circuit board 31 according to the thickness of the printed circuit board 31 and the diameter of the through-hole 33, laser processing, or the like. Can be formed. The lands 34 and 35 can be formed by a known technique such as plating or metal foil etching. In the present embodiment, when the metal plate is punched to form the terminal 70, the distal ends of the insertion mounting portions 71e and 72e of the terminal 70 are the housing of the printed circuit board 31 with the connector 50 mounted on the printed circuit board 31. The lengths of the insertion mounting portions 71e and 72e are set so as not to protrude to the rear surface side of the arrangement surface. Further, the surface mounting portions 71d and 72d and the insertion mounting portions 71e and 72e corresponding to the same terminal 70 are integrally formed.

  Next, the housing arrangement surface side is mounted on the prepared printed circuit board 31. First, as shown in FIGS. 10A to 10C, on the lands 34 and 35 (on the surface portions 34 a and 35 a and on the wall surface portions 34 b and 35 b in the through hole 33) using a screen printing method. The paste-like solder 90 adjusted to a predetermined viscosity is applied. In the application step, it is possible to apply the solder 90 on the surface portions 34a and 35a and the wall surface portions 34b and 35b in the through-hole 33 in a lump, but in this embodiment, screens having different mask shapes are used. The application is carried out in two steps, the first step and the second step, respectively.

  In the first step, as shown in FIG. 10A and FIG. 11, an opening 111 is provided at a position corresponding to the through hole 33 so as to substantially coincide (size and shape) with the through hole 33. The first screen 110 is used. Then, paste-like solder 90 is supplied onto the first screen 110, and the squeegee 112 is run to execute screen printing. As a result, the solder 90 is transferred to the printed circuit board 31 side through the opening 111, and the paste-like solder 90 is filled into the through-hole 33 from the housing arrangement surface side. At this time, the air in the through hole 33 escapes to the outside from the opening on the back surface side of the printed board 31, so that the solder 90 can be filled into the through hole 33. In addition, the thickness (mask thickness) of the first screen 110 is preferably as thin as possible in order to fill the through hole 33 with the solder 90.

  After the first step, the second step is performed. In the second step, as shown in FIGS. 10B and 11, the positions corresponding to the surface portions 34 a and 35 a and the through-hole 33 substantially coincide with the outer shapes of the surface portions 34 a and 35 a (size and shape). In addition, the second screen 113 is used in which the opening 114 is provided and the opening 115 is provided at a position corresponding to the land 37 so as to substantially match (size and shape) the outer shape of the land 37. Then, paste-like solder 90 is supplied onto the second screen 113, the squeegee 112 is run, and screen printing is executed. As a result, the solder 90 is transferred to the printed circuit board 31 side through the openings 114 and 115, and the paste-like solder 90 is disposed on the surface portions 34 a and 35 a of the lands 34 and 35 and the land 37 from the housing arrangement surface side. At the same time, they are also laminated on the solder 90 arranged in the first step. The thickness of the second screen 113 (mask thickness) is preferably as thick as possible in order to dispose the solder 90 on the surface portions 34a and 35a. In the present embodiment, the thickness of the first screen 110 is made thinner than the thickness of the second screen 113, so that the solder 90 is efficiently filled in the through holes 33 and the surface portions 34a and 35a are formed. The solder thickness is ensured.

  As described above, when the coating process is constituted by a plurality of screen printing processes, more solder in the through-hole 33 can be obtained without adjusting the partial mask thickness, printing pressure, etc. unlike the single screen printing process. 90 can be supplied, and as a result, the solder 90 disposed on the surface portions 34a and 35a can be thickened. Therefore, the contact area between the surface mounting portions 71d and 72d and the insertion mounting portions 71e and 72e and the solder 90, and the lands 34 and 35 and the solder 90 can be increased. Moreover, although it is the structure which screen-prints in multiple times, the stain | pollution | contamination (transfer from the printed circuit board side) of the screen back surface can be prevented. Furthermore, since the solder 90 is also filled in the through-hole 33 in advance before reflow, the solder 90 flowing into the through-hole 33 from the surface portions 34a and 35a is reduced or the through-hole 33 in the reflow process described later. Solder 90 flowing into the inside can be eliminated.

  When screen printing is performed in multiple steps, the solder 90 transferred to the printed circuit board 31 by the first screen printing (first process) adheres to the back surface of the screen during the second screen printing (second process). As a result, problems such as dirt may occur. In contrast, in the present embodiment, as shown in FIG. 11, the opening 114 of the second screen 113 used in the second step is larger than the opening 111 of the first screen 110 used in the first step. The portion 111 is included in the opening 114. Therefore, the above-mentioned contamination problem can be prevented. Further, as described above, since the surface portions 34a and 35a and the wall surface portions 34b and 35b are integrated, the number of openings is reduced as compared with the configuration in which both are separated, and this also causes contamination. Can be reduced. Further, in the second process, the printing process is reduced by applying the solder 90 on the lands 37 corresponding to the electronic components 32 other than the connector 50, thereby reducing the occurrence of contamination. . Further, the solder thickness on the land 37 is ensured.

  When the first step and the second step (coating step) are completed, as shown in FIG. 10C, solder is applied on the surface portions 34a and 35a, on the wall surface portions 34b and 35b in the through hole 33, and on the land 37. A printed circuit board 31 on which 90 is arranged is prepared. Then, the electronic component 32 including the connector 50 is positioned and arranged on the housing arrangement surface of the printed board 31. As a result, the insertion mounting portions 71 e and 72 e of the terminal 70 penetrate the solder 90 and are inserted into the through hole 33. Further, the respective surface mounting portions 71 d and 72 d of the terminal 70 are disposed on the surface portions 34 a and 35 a of the corresponding lands 34 and 35 so as to be in contact with the solder 90. As described above, in the present embodiment, since the insertion mounting portions 71e and 72e are inserted into the through hole 33, the positioning of the connector 50 with respect to the printed circuit board 31 is easy. Further, since the insertion mounting portions 71e and 72e serve as anchors, it is possible to suppress positional deviation between the terminals 70 and the corresponding lands 34 and 35 in the direction perpendicular to the thickness direction of the printed circuit board 31. .

  Then, reflow is performed in a state where the electronic component 32 including the connector 50 is disposed on the printed circuit board 31. As a result, the melted solder 90 spreads out, and is preferably cooled and solidified in a state where a fillet is formed between the surface mounting portions 71d and 72d.

  In the present embodiment, the distal ends of the insertion mounting portions 71e and 72e are positioned between the housing arrangement surface of the printed circuit board 31 and the back surface thereof in a state of being inserted into the through hole 33. Further, in the application step, the solder 90 is filled up to the middle of the through hole 33. Furthermore, the front surface portions 34a and 35a, the wall surface portions 34b and 35b, and the back surface portions 34c and 35c constituting the lands 34 and 35 are respectively integrated. Accordingly, when the surface mounting portions 71d and 72d are in contact with the solder 90 on the surface portions 34a and 35a, a part of the solder 90 on the surface portions 34a and 35a is replaced with the wall surface portions 34b and 35b and the insertion mounting portion at the time of reflow. 71e, 72e flows into a gap (hereinafter referred to as a gap between the through hole 33 and the insertion mounting portions 71e, 72e) formed by facing each other by capillary action and / or gravity. FIG. 8 shows a structure in which the solder 90 is cooled and solidified in this state. Further, due to variations in the height direction of the terminal 70 with respect to the housing arrangement surface, if the contact between the surface mounting portions 71d and 72d and the solder 90 on the surface portions 34a and 35a is insufficient before reflowing, the through hole 33 and the insertion are inserted. Desired contact between the terminal 70 and the solder 90 is sufficient to secure the connection reliability by the molten solder 90 being wetted by the capillary phenomenon through the gap between the mounting portions 71e and 72e. An area can be secured. That is, in any case, the terminal 70 and the lands 34 and 35 can be electrically and mechanically connected (joined) via the solder 90. In particular, in the present embodiment, the solder 90 is efficiently filled in the through-hole 33 in the coating process and the thickness of the solder 90 on the surface portions 34a and 35a is ensured, so that the connection reliability can be further improved. . In addition, since the solder 90 is filled in the through hole 33 in advance, the amount of the solder 90 that flows into the through hole 33 from the surface portions 34a and 35a in the reflow process is not filled in the solder 90 in advance. Can be reduced compared to Therefore, this also secures the thickness of the solder 90 on the surface portions 34a and 35a, and the connection reliability can be further improved. In addition, since a sufficient amount of solder 90 is disposed in the through hole 33, generation of voids can be suppressed.

  At the time of reflow, due to the difference in coefficient of linear expansion between the printed circuit board 31 and the housing 60 of the connector 50, at least one of the printed circuit board 31 and the housing 60 before the solder 90 is cooled and solidified (molten state). Deformation such as warping may occur. Particularly, like the connector 50 shown in the present embodiment, a configuration having a long shape in one direction in a direction perpendicular to the thickness direction of the printed circuit board 31 and a plurality of terminals 70 arranged along the longitudinal direction. In the above, the amount of deformation described above increases toward the end in the longitudinal direction. That is, in the connection between the terminal 70 and the corresponding lands 34 and 35, the connection reliability tends to decrease toward the end side. However, in the present embodiment, as described above, since the insertion mounting portions 71e and 72e inserted into the through holes 33 serve as anchors, the state before the solder 90 is cooled and solidified (molten state). Therefore, it is possible to prevent the positional deviation from occurring between the terminal 70 and the corresponding lands 34 and 35.

  After the reflow on the housing arrangement surface side of the printed circuit board 31 is completed, the reflow mounting of the electronic component 32 is similarly performed on the back surface of the printed circuit board 31. Thereby, the electronic control apparatus 1 shown in FIG. 1 is formed.

  As described above, in this embodiment, the terminal 70 is a branched terminal having the surface mounting portions 71d and 72d and the insertion mounting portions 71e and 72e, and the insertion mounting portions 71e and 72e are inserted into the through holes 33. In this state, reflow is executed. Therefore, connection reliability can be improved.

  Further, since the insertion mounting portions 71e and 72e are inserted into the through-hole 33, flow soldering is not required, so that the mounting prohibited area of the electronic component 32 is reduced on the back surface of the housing placement surface of the printed circuit board 31. be able to. That is, the mounting density can be improved.

  In the present embodiment, an example is shown in which the coating process is divided into the first process and the second process using screens 110 and 113 having different mask shapes, respectively. However, the number of screen printings is not limited to two. It is good also as 3 times or more. Moreover, it is also possible to apply the solder 90 on the wall surfaces 34b and 35b, the surface portions 34a and 35a, and the lands 37 of the lands 34 and 35 at a time by one screen printing. For example, the screen thickness (mask thickness) may be partially changed, the traveling speed of the squeegee 112 may be adjusted (slower than the land 37 on each land 34, 35), or the printing pressure may be adjusted ( Connection reliability can be improved by making the land 34, 35 stronger than the land 37).

  Moreover, in this embodiment, the example which makes the opening part 114 of the 2nd screen 113 substantially the same as the surface parts 34a and 35a of the land 34 and 35 was shown. However, the configuration shown in the present embodiment is equivalent to the solder on the surface portions 34a and 35a as compared with the configuration having only the surface portions 34a and 35a as the lands 34 and 35 by the amount of the wall surface portions 34b and 35b of the through hole 33. The amount may be insufficient. Therefore, the opening 114 may be made larger than the surface portions 34a and 35a including the surface portions 34a and 35a as long as no short circuit occurs between the adjacent lands 34 and 35. By doing so, it is possible to earn the thickness of the solder 90 on the surface portions 34a and 35a without changing the thickness of the solder 90.

  In the present embodiment, for example, as shown in FIG. 6, the outer shape of the surface portions 34 a and 35 a of the lands 34 and 35 is rectangular in the direction perpendicular to the thickness direction of the printed circuit board 31. showed that. However, depending on the diameter of the terminal 70 (diameter of the through hole 33), as shown in FIG. 12, in the arrangement direction of the terminal 70, a portion around the through hole 33 in the surface portions 34a and 35a of the lands 34 and 35. It is good also as a structure larger than other parts. As described above, even if the surface portions 34a and 35a are thickened only around the through-holes 33, the amount of solder on the surface portions 34a and 35a is reduced so as to form a side fillet suitable for the surface mounting portions 71d and 72d. The amount of solder can be optimized, and the amount of solder in the through hole 33 and the insertion mounting portions 71e and 72e can be increased. Specifically, the width of the surface portions 34 a and 35 a (the width of the other portion excluding the portion around the through hole 33 in the arrangement direction of the terminals 70) may be about the hole diameter of the through hole 33. As shown in FIG. 12, when the position of the second land 35 (through hole 33 and surface portion 35a) far from the housing 60 is shifted in the separating direction of the housing 60, the printed circuit board in the longitudinal direction of the housing 60 is used. The physique of 31 and by extension, the physique of the electronic control apparatus 1 can be reduced in size. However, since the lengths of the terminals 70 extending from the housing 60 are different, the types of terminals are increased. FIG. 12 is a plan view of a printed board 31 showing a modification. In FIG. 12, for convenience, solder and solder resist are omitted.

  Moreover, in this embodiment, the example which performs the reflow mounting of the back surface side after the reflow end of the housing arrangement surface side in the printed circuit board 31 was shown was shown. However, after the reflow on the back surface side of the housing arrangement surface in the printed circuit board 31 is completed, the reflow mounting on the housing arrangement surface side may be executed. In this case, even if the insertion mounting portions 71e and 72e are configured to protrude to the rear surface side of the housing arrangement surface of the printed circuit board 31, the electronic components 32 on the rear surface side of the housing arrangement surface of the printed circuit board 31 by the insertion mounting portions 71e and 72e. It does not interfere with the heat of reflow.

  In the present embodiment, the solder 90 is disposed on the surface portions 34a, 35a of the lands 34, 35 provided on the housing arrangement surface side of the printed circuit board 31, and the connector 50 is printed by reflow on the housing arrangement surface side. The example mounted on the board | substrate 31 was shown. However, in a configuration in which the terminal 70 includes the insertion mounting portions 71e and 72e as mounting portions (a configuration in which the printed board 31 has the through hole 33), reflow heat on the back surface side of the housing arrangement surface may be used for mounting. That is, the connector 50 may be mounted on the printed circuit board 31 by reflow from both sides. By doing so, sufficient heat is supplied to the connection portions of the terminals 70 (71, 73, 75) corresponding to the first lands 34 in particular, and the solder 90 is melted, so that the connection reliability between the lands 34 and the terminals 70 is improved. Can be increased. In this case, as shown in FIG. 13, of the insertion mounting portions 71e and 72e, if at least the insertion mounting portion 71e is configured to protrude to the back side of the housing arrangement surface of the printed circuit board 31, the protruding portion of the insertion mounting portion 71e is Since it receives reflow heat on the back surface side of the housing arrangement surface, connection reliability can be ensured even if sufficient heat is not supplied to the mounting portion (particularly the insertion mounting portion 71e) of the terminal 71 due to reflow on the housing arrangement surface side. it can. In addition, when the insertion mounting portions 71e and 72e are configured to protrude to the rear surface side of the housing arrangement surface of the printed circuit board 31, for example, even if deformation such as warping occurs in at least one of the printed circuit board 31 and the housing 60 during reflow, the terminal 70 And the corresponding lands 34 and 35 can be more reliably secured. FIG. 13 is a cross-sectional view showing a modification.

  Further, when the connector 50 is mounted on the printed circuit board 31 by utilizing reflow on the back side of the housing arrangement surface, in the lands 34 and 35, the size of the back surface portions 34c and 35c is smaller than that of the front surface portions 34a and 35a. It is preferable to make it larger than the maximum tolerance of the hole diameter of the through-hole 33 within a range that satisfies the above. For example, in FIG. 13, the size of the back surface portion 34c is slightly smaller than that of the front surface portion 34a. With such a configuration, the amount of heat received by the back surface portions 34c and 35c and by extension the lands 34 and 35 increases, so that the connection reliability can be improved.

  Further, when the connector 50 is mounted on the printed circuit board 31 by utilizing the reflow on the back surface side of the housing arrangement surface, it is not limited to the example in which the solder 90 is applied on the surface portions 34a and 35a of the lands 34 and 35. . For example, as shown in FIG. 14, solder 90 is applied to the back surface portions 34 c and 35 c provided around the opening of the through hole 33 on the back surface side of the housing arrangement surface of the printed circuit board 31. The housing 60 including the terminal 70 is attached to the printed circuit board 31 so that the insertion mounting portions 71e and 72e are inserted into the through-hole 33 and the surface mounting portions 71d and 72d are arranged to face each other on the surface portions 34a and 35a. Reflow may be performed from the back side of the housing arrangement surface with the housing arrangement surface facing down in a state of being fixed on the housing arrangement surface (for example, adhesion, screw fastening, clip, etc.). If it does in this way, solder 90 will flow into penetration hole 33 with dead weight of solder 90, and wall surface parts 34b and 35b and insertion mounting parts 71e and 72e can be connected. Further, when the surface mounting portions 71d and 72d are provided, the surface mounting portions 71d and 72d can receive the solder 90, so that the surface portions 34a and 35a and the surface mounting portions 71d and 72d can be connected. In the above description, when the housing 60 is fixed to the printed circuit board 31 and the tip of the insertion mounting portions 71e and 72e protrudes to the back side of the housing arrangement surface (see FIG. 13), the capillary tube is effective for the effect of its own weight. Considering the effect of the phenomenon, the solder 90 can be easily drawn into the through hole 33. FIG. 14 is a cross-sectional view showing a modification.

  In the present embodiment, as the terminals 70 (71, 73, 75) connected to the first land 34, the second connecting portion 71b and the mounting portion (surface mounting portion 71d) of the first land 34 are connected. The configuration to be shown. However, the lower end of the second connecting portion 71b is substantially parallel to the housing placement surface of the printed circuit board 31, and is exposed from the housing 60 and closer to the housing placement surface of the printed circuit board 31 than the third parallel portion 71a. The parallel portions thus formed may be connected, and the mounting portion with the first land 34 may be connected to the end of the parallel portion far from the housing 60. That is, it is good also as a structure by which the 2nd connection part 71b and a mounting part are connected via a parallel part.

(Second Embodiment)
Next, 2nd Embodiment of this invention is described based on FIGS. FIG. 15 is an enlarged cross-sectional view of the periphery of the printed circuit board and connector mounting portion in the electronic control device according to the second embodiment. 16 is a cross-sectional view taken along line XVI-XVI in FIG. 17 is a cross-sectional view taken along line XVII-XVII in FIG. 18 and 19 are cross-sectional views as comparative examples. FIG. 15 corresponds to FIG. 8 shown in the first embodiment.

  Since the electronic control device according to the second embodiment is often in common with that according to the first embodiment, a detailed description of the common parts will be omitted below, and different parts will be mainly described. Moreover, in this embodiment, the same code | symbol shall be provided about the component similar to 1st Embodiment.

  In the first embodiment, the first connecting portion 72b includes a terminal 70 (71, 73, 75) connected to the first land 34 and a terminal 70 (72, 74, 76) connected to the second land 35. In the example, the second connecting portions 71b and the second connecting portions 71b are alternately arranged along the arrangement direction of the terminals 70. On the other hand, in the present embodiment, for example, as shown in FIG. 17, the first connecting portion 72b and the second connecting portion 71b are arranged in a line along the arrangement direction of the terminals 70, and the first connecting portion 72b. The second connecting portion 71b is staggered. Further, the first parallel portion 72a is located farther from the housing arrangement surface of the printed circuit board 31 than the third parallel portion 71a.

  In addition, the code | symbol 61 shown in FIG. 16 is a groove part for hold | maintaining the 1st connection part 72b provided in the housing 60, and the code | symbol 62 is a wall part between the groove parts 61 (between the 1st connection parts 72b). . The code | symbol 63 shown in FIG. 17 is a groove part for hold | maintaining the 2nd connection part 71b provided in the housing 60, and the code | symbol 64 is a wall part between the groove parts 63 (between the 2nd connection parts 71b). In the present embodiment, each terminal 70 is inserted and fixed in a recess (including the groove portions 61 and 62 described above) provided in the housing 60. Specifically, the housing 60 has groove portions 61 and 62 provided on one surface of the lands 34 and 35, and a through hole that connects to the groove portion and penetrates the back surface of the groove forming surface. Each terminal 70 is inserted into the through hole from the groove forming surface side with the connection end with the external connector as the head, and the entire first parallel portion 72a and third parallel portion 71a are inserted into the through hole of the housing 60. Is fixed. Further, in this fixed state, the first connecting portion 72 b and the second connecting portion 71 b are accommodated in the corresponding groove portions 61 and 62 and are held (not fixed) by the housing 60.

  As shown in this embodiment, when the first connecting portion 72b and the second connecting portion 71b are arranged in a staggered manner, the distance between the first connecting portion 72b and the second connecting portion 71b of the adjacent terminal 70 is as follows. As shown in FIG. 17, the distance is L1. On the other hand, when the 1st connection part 72b and the 2nd connection part 71b are alternately arrange | positioned along the arrangement direction of the terminal 70, and are made into 1 row, the 1st connection part 72b and the 2nd connection part of the terminal 70 which adjoins. The distance between 71b becomes the distance L2 shorter than the distance L1 mentioned above, for example, as shown in FIG. Thus, according to the electronic control device 1 according to the present embodiment, the distance between the adjacent terminals 70 can be increased, so that crosstalk can be suppressed. Therefore, the physique in the arrangement direction of the terminals 70 can be reduced in size while ensuring quality (suppressing crosstalk). In addition, the code | symbol 65 shown in FIG. 18 is the wall part 65 between the groove parts 61 and 63 (between connection part 71b, 72b). In FIG. 18, for convenience, the same reference numerals are given to the same components as in the present embodiment.

  In the present embodiment, as shown in FIG. 15 as in the first embodiment, the first parallel portion 72a is positioned farther from the housing arrangement surface of the printed circuit board 31 than the third parallel portion 71a. . Further, the first connecting portion 72b is positioned closer to the second land 35 than the second connecting portion 71b in the direction perpendicular to the arrangement direction of the terminals 70 and along the housing arrangement surface of the printed circuit board 31. Yes. That is, not only in the direction in which the terminals 70 are arranged, but also in the direction perpendicular to the housing arrangement surface of the printed circuit board 31 and in the direction perpendicular to the arrangement direction of the terminals 70 and along the housing arrangement surface of the printed circuit board 31. 72 is configured not to overlap (do not cross). Therefore, the terminal 70 (71, 73, 75) connected to the first land 34 and the terminal 70 (72, 74, 76) connected to the second land 35 adjacent to the terminal 70 (71, 73, 75). ) Can be more effectively suppressed.

  Moreover, in this embodiment, as shown in FIGS. 15-17, of the 2nd connection part 71b and the 1st connection part 72b, the 1st connection part 72b made into the position close | similar to the 2nd land 35 is shown. A predetermined range (more specifically, a range higher than the third parallel portion 71a with respect to the housing arrangement surface of the printed circuit board 31) from the connection portion with the first parallel portion 72a is formed in the housing 60 by the groove portion 61 as described above. Is retained. As a result, as shown in the first embodiment, the housing is compared with a configuration in which the entire first connecting portion 72b is exposed from the housing 60 (a configuration in which a part of the first parallel portion 72a is also exposed from the housing 60). The length of the terminal 72 exposed from 60 is shortened. Therefore, as compared with the configuration in which the first connecting portion 72b is not held by the housing 60, the positional accuracy between the surface mounting portion 72d and the insertion mounting portion 72e and the corresponding second land 35 (through hole 33) can be improved. Moreover, since the predetermined range from the connection part with the 2nd parallel part 72c among the 1st connection parts 72b is not hold | maintained at the housing 60, compared with the structure by which all the 1st connection parts 72b are hold | maintained by the housing 60. Thus, the first connecting portion 72b can effectively relieve the stress acting on the connection portion between the surface mounting portion 72d and the insertion mounting portion 72e and the second land 35. In the present embodiment, as shown in FIG. 15, a predetermined range from the connection portion of the second connecting portion 71b with the third parallel portion 71a (in other words, the connection between the surface mounting portion 71d and the insertion mounting portion 71e). Since the portion excluding the predetermined range from the part is also held by the housing 60, the same effect as the first connecting portion 72b or an effect equivalent thereto can be expected. Also, in the signal terminals 73 to 76 (not shown), the lower two-stage (lower half) terminals 73 and 75 connected to the first land 34 have the same configuration as the terminal 71, The upper two-stage (upper half) terminals 74 and 76 to be connected have the same configuration as the terminal 72.

  In addition, when the housing 60 has the groove part (wall part by a groove part) which hold | maintains a connection part as mentioned above, it is necessary to give a predetermined thickness to a wall part in order to ensure intensity | strength and electrical insulation. is there. However, when both the first connecting portion 72b and the second connecting portion 71b are held at the same height in the housing 60 as in the configuration illustrated in FIG. 18, the gaps 61 and 63 (between the connecting portions 71b and 72b). The thickness of the wall portion 65 is thinner than the thickness of the wall portions 62 and 64 shown in FIGS. In particular, as shown in the present embodiment, in the configuration in which the first connecting portion 72b and the second connecting portion 71b are arranged in a staggered manner, the first connecting portion 72b is arranged in the housing of the printed circuit board 31 rather than the third parallel portion 71a. If the housing 60 is held to a position lower than the surface, the wall portion 66 between the groove portions 61 and 63 (between the connecting portions 71b and 72b) is thin as shown in FIG. It gets longer and deeper. Therefore, in the configuration shown in FIGS. 18 and 19, the walls 65 and 66 become necks, and it is difficult to reduce the size of the physique in the arrangement direction of the terminals 70. On the other hand, as shown in the present embodiment, in the direction perpendicular to the housing arrangement surface of the printed circuit board 31, the holding position by the housing 60 is not overlapped by the first connecting part 72b and the second connecting part 71b. Then, the physique can be made smaller in the arrangement direction of the terminals 70 than in the configuration shown in FIGS. 18 and 19.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 20 is an enlarged cross-sectional view of the periphery of the printed circuit board and the connector mounting portion in the electronic control device according to the third embodiment. FIG. 20 corresponds to FIG. 8 shown in the first embodiment.

  Since the electronic control device according to the third embodiment is often in common with that according to the first embodiment and the second embodiment, the detailed description of the common parts will be omitted below, and different parts will be described mainly. Moreover, in this embodiment, the same code | symbol shall be provided about the component similar to 1st Embodiment.

  In each of the above-described embodiments, the first parallel portion 72a of the terminal 70 (72, 74, 76) connected to the second land 35 is the terminal 70 (71, 73, 75) connected to the first land 34. In the example, the third parallel portion 71a is further away from the housing arrangement surface of the printed circuit board 31 than the third parallel portion 71a. In such a configuration, the portion of the terminal 70 (71, 73, 75) connected to the first land 34 exposed from the housing 60 is the terminal 70 (72, 74, 76) connected to the second land 35. ) In the direction perpendicular to the housing arrangement surface of the printed circuit board 31 and the direction perpendicular to the arrangement direction of the terminals 70 and along the housing arrangement surface. . That is, the terminal 70 (71, 73, 75) connected to the first land 34 is more disadvantageous in terms of connection reliability than the terminal 70 (72, 74, 76) connected to the second land 35. .

  Therefore, in the present embodiment, the connection between the first land 34, the surface mounting portion 71d, and the insertion mounting portion 71e is connected to the second connecting portion 71b of the terminal 70 (71, 73, 75) connected to the first land 34. The stress relaxation part which relieves the stress which acts on a part is provided. For example, in FIG. 20, in order to relieve the stress in the direction perpendicular to the housing arrangement surface of the printed circuit board 31, a U-shaped protrusion protrudes toward the fitting side with the external connector as the stress relieving portion in the middle of the second connecting portion 71b. By providing the letter-shaped bent portion 71f, the second connecting portion 71b is easily deformed by spring. As described above, when the stress relaxation portion is provided, the stress acting on the connection portion between the first land 34 and the surface mounting portion 71d and the insertion mounting portion 71e is connected to the stress acting on the connection portion between the land and the terminal by the second connection. The portion 71b can efficiently relax, thereby improving the reliability of the connecting portion.

  In the present embodiment, the example in which the stress relaxation portion is provided in the second connection portion 71 b of the terminal 70 (71, 73, 75) connected to the first land 34 has been described. The first connection portion 72b of the terminal 70 (72, 74, 76) may be provided with a stress relaxation portion.

  Further, in the configuration in which the terminals 70 are arranged in a plurality of stages with respect to the housing 60, when the stress relaxation portions are provided in the lowermost stage and the second stage terminal 70, the lowermost stage terminal 70, the second stage terminal 70, Therefore, the direction of the protrusions of the bent portion 71f may be different. For example, in FIG. 21, among the signal terminals 73 to 76 described above, among the terminals 73 and 75 connected to the first land 34, the bent portion 71f of the terminal 73 whose holding position with respect to the housing 60 is the lowest is printed. The board 31 has a U-shape protruding in a direction away from the housing arrangement surface, and the bent portion 71f of the terminal 75 whose holding position with respect to the housing 60 is in the second stage is projected U-shaped on the fitting side with the external connector. It is said. With such a configuration, the length of the second connecting portion 71b, that is, the length in the direction perpendicular to the housing arrangement surface of the printed circuit board 31, is bent at the terminal 70 (73) at the lowermost stage with respect to the housing 60. The stress relieving portion can be configured while the portion 71f is shorter than the configuration in which the portion 71f protrudes in a direction away from the housing arrangement surface. That is, in a configuration having a large number of stages, the connection reliability can be improved by providing a stress relaxation portion while suppressing the size of the connector 50 in the height direction. FIG. 21 is a cross-sectional view showing a modification. Even in the configuration having the bent portion 71f as described above, as shown in the first embodiment, the printed circuit board is provided between the second connecting portion 71b having the bent portion 71f and the mounting portion (surface mounting portion 71d). It is good also as a structure which provides a parallel part substantially parallel to the housing arrangement | positioning surface of 31, and connects this 2nd connection part 71b and a mounting part.

  In addition, in this embodiment, although the example in which a stress relaxation part is comprised by the U-shaped bending part 71f was shown, a shape is not limited to U shape. Moreover, it is good also as a structure which is easy to carry out a spring deformation | transformation of a connection part by formation of notches etc. instead of bending.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 22 is an enlarged cross-sectional view of the periphery of the printed circuit board and connector mounting portion in the electronic control device according to the fourth embodiment. FIG. 22 corresponds to FIG. 8 shown in the first embodiment.

  Since the electronic control device in the fourth embodiment is often in common with that in the first to third embodiments, detailed description of the common parts will be omitted, and different parts will be described mainly. Moreover, in this embodiment, the same code | symbol shall be provided about the component similar to 1st Embodiment.

  In each embodiment mentioned above, the example where the 1st parallel part 72a was made into the position far from the housing arrangement surface of printed circuit board 31 rather than the 3rd parallel part 71a was shown. On the other hand, in the present embodiment, as shown in FIG. 22, for example, the third parallel portion 71a is located farther from the housing arrangement surface of the printed circuit board 31 than the first parallel portion 72a. Features.

  With such a configuration, the length of the portion extending from the housing 60 of the terminal 70 (71, 73, 75) connected to the first land 34 is made longer than the configuration shown in each of the embodiments described above. The length of the portion extended from the housing 60 by the terminal 70 (72, 74, 76) connected to the second land 35 and the terminal terminal 70 (71, 73, 75) connected to the first land 34. Can be close to each other. Therefore, the reliability of the connection portion between the first land 34 and the terminal terminal 70 (71, 73, 75) can be increased.

  In addition, since the reflow heat easily hits the second connecting portion 71b as compared with the configuration shown in each of the above-described embodiments, it is possible to improve connection reliability. In the present embodiment, as in the second embodiment, the first connecting portion 72b and the second connecting portion 71b are arranged in a staggered manner, and the housing arrangement of the printed circuit board 31 is perpendicular to the arrangement direction of the terminals 70. In the direction along the surface, the second connecting portion 71b is closer to the second land 35 than the first connecting portion 72b. Therefore, the reflow heat easily hits the second connecting portion 71b.

  In the present embodiment, as described above, since the first connecting portion 72b and the second connecting portion 71b are arranged in a staggered manner, the third parallel portion 71a is a printed circuit board rather than the first parallel portion 72a. In this configuration, the crosstalk is suppressed while the configuration is far from the housing arrangement surface 31. However, in the configuration in which the third parallel portion 71a is farther from the housing arrangement surface of the printed circuit board 31 than the first parallel portion 72a, the terminals 70 (71, 73, 71) connected to the first land 34 are used. 75) and the terminal 70 (72, 74, 76) connected to the second land 35, the crossing position can be made to some extent. Therefore, the configuration shown in the second embodiment is preferable in suppressing crosstalk.

(Fifth embodiment)
Next, 5th Embodiment of this invention is described based on FIG.23 and FIG.24. FIG. 23 is an enlarged cross-sectional view of the periphery of the printed circuit board and connector mounting portion in the electronic control device according to the fifth embodiment. FIG. 24 is a cross-sectional view showing the coating process. FIG. 23 corresponds to FIG. 8 shown in the first embodiment.

  Since the electronic control device in the fifth embodiment is in common with those in the above-described embodiments, detailed description of the common parts will be omitted, and different parts will be described mainly. Moreover, in this embodiment, the same code | symbol shall be provided about the component similar to 1st Embodiment.

  In each embodiment mentioned above, the example in which the housing 60 is arrange | positioned only on one surface of the printed circuit board 31 was shown. On the other hand, in the present embodiment, housings are arranged on both opposing surfaces of the printed circuit board 31, and the terminals held in one housing are connected to the first land 34 and held in the other housing. The terminal is connected to the second land. Of the terminals connected to the first land 34 and the terminals connected to the second land 35, the tip of the insertion mounting portion of one terminal is inserted into the through hole 33 and the corresponding housing arrangement surface It is the same position as the back surface, or a position between the housing arrangement surface and the back surface, and the tip of the insertion mounting portion of the other terminal is projected to the back surface side of the corresponding main body portion arrangement surface. It is characterized by that.

  An example is shown in FIG. In FIG. 23, except that the housing 60 is divided into two parts, that is, a housing holding a terminal connected to the first land 34 and a housing holding a terminal connected to the second land 35. The configuration is the same as that of the embodiment described above. Specifically, as the housing 60, a housing 60a arranged on one surface of the printed circuit board 31 and arranged with terminals 71 connected to the first land 34 on the side close to the housing 60 (one end surface of the printed circuit board 31); The housing 60b is arranged on the rear surface of the arrangement surface of the housing 60a of the printed circuit board 31 and the terminals 72 connected to the second lands 35 are arranged. The terminals 70 (71, 72) have surface mounting portions 71d, 72d and insertion mounting portions 71e, 72e as mounting portions for the lands 34, 35. Of the terminals 72 connected to the two lands 35, the tip of the insertion mounting portion 71e of the terminal 71 is positioned between the arrangement surface of the housing 60a and the back surface thereof in a state of being inserted into the through hole 33. Further, the distal end of the insertion mounting portion 72e of the terminal 72 protrudes toward the back surface (arrangement surface of the housing 60a) of the housing 60b in a state of being inserted into the through hole 33.

  With such a configuration, for example, as shown in FIG. 24, solder 90 is applied onto the land 34, 35 on the arrangement surface side of the housing 60a (front surface 34a, back surface 35c), and the housing 60a When reflowing from the arrangement surface side, the reflow heat to the terminal 71 connected to the first land 34 is not hindered by the terminal 72 connected to the second land 35, so that the connection reliability can be improved. Further, since the distal end of the insertion mounting portion 71e does not protrude through the through hole 33 to the arrangement surface side of the housing 60b, the same effect as that shown in the first embodiment can be expected.

  Further, in the terminal 72 connected to the second land 35, the tip of the insertion mounting portion 72e penetrates the through hole 33 and protrudes to the arrangement surface side of the housing 60a. Therefore, as shown as a modification of the first embodiment (see FIGS. 13 and 14), the solder 90 on the back surface portion 35c can be drawn into the through hole 33 by gravity or capillary action. Therefore, the connection reliability of the wall surface portion 35b and the insertion mounting portion 72e and the surface portion 35a and the surface mounting portion 72d can be ensured.

  In the terminal 72 connected to the second land 35, the second parallel portion 72c is positioned closer to the arrangement surface of the housing 60b of the printed circuit board 31 than the first parallel portion 72a, as in the above-described embodiment. Yes. Therefore, when reflowing also from the arrangement surface side of the housing 60b (reflowing from both sides), the reflow heat to the terminal 71 connected to the first land 34 is hindered by the terminal 72 connected to the second land 35. The influence on connection reliability due to being performed can be reduced.

  In the present embodiment, the housing 60a and the housing 60b are configured as one connector 50 in a state where they are integrated with each other, for example, by fitting. In addition, it may be configured as one connector 50 by being fixed by another member. Such a configuration and fixing method of the connector 50 including a plurality of housings 60 are described in detail in Japanese Patent Application No. 2006-232602 by the applicant of the present invention, and thus description thereof in this embodiment is omitted.

  The housing 60a including the terminal 71 connected to the first land 34 is first reflow mounted on the printed circuit board 31, and then the housing 60b including the terminal 72 connected to the second land 35 is reflow mounted. The electronic control device 1 described above can also be obtained.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In the present embodiment, the printed circuit board 31 includes two lands that are perpendicular to the arrangement direction of the terminals 70 and have different positional relationships in the direction along the housing arrangement surface of the printed circuit board 31. The example in which the side close to 60 (close to one end face on the side where the connector 50 of the printed circuit board 31 is disposed) is the first land 34 and the side far from the housing 60 is the second land 35 is shown. However, the plurality of rows of lands are not limited to two rows. For example, in lands arranged in three rows, the land closest to the main body may be the first land, and the land farthest from the main body may be the second land. The land closest to the main body may be the first land, and the land in the middle row may be the second land. Furthermore, the land in the middle row may be the first land, and the land farthest from the main body may be the second land.

  In the present embodiment, the first parallel portion 72 a and the third parallel portion 71 a are different in position in the direction perpendicular to the housing arrangement surface of the printed circuit board 31, and the first parallel portion 72 a is at least relative to the housing 60. An example in which one stage is arranged and at least one third parallel part is arranged is shown. However, the first parallel part 72a and the third parallel part 71a may be arranged in a row on the housing 60 in a direction perpendicular to the housing arrangement surface of the printed circuit board 31.

  In the present embodiment, a connector 50 is shown as an example of an electronic component, and an electronic control device 1 is shown in which a connector 50 is mounted on a printed circuit board 31 as an example of an electronic device that is mounted on the printed circuit board. . However, if the electronic component has a configuration in which a plurality of terminals extend from the main body, the above-described configuration can be adopted, and an effect equivalent to or equivalent to the effect shown in each of the above-described embodiments is expected. Can do. For example, the present invention may be applied to an electronic component 32 (for example, a microcomputer) other than the connector 50 shown in FIG.

  Moreover, in this embodiment, the example by which the edge part of the side mounted in the printed circuit board 31 of the terminal 70 is extended from one surface of the housing 60 (main-body part) of the connector 50 (electronic component) was shown. However, the above-described configuration and manufacturing method can also be adopted in a configuration in which end portions on the side mounted on the printed circuit board 31 are extended from a plurality of surfaces of the main body.

  In the present embodiment, an example including power terminals 71 and 72 and signal terminals 73 to 76 as the terminal 70 is shown. However, the type of the terminal 70 is not particularly limited. It is sufficient to include at least a terminal connected to the first land 34 and a terminal connected to the second land 35.

  In this embodiment, the example of the electronic control apparatus 1 of the non-waterproof structure was shown as an electronic apparatus. However, the present invention can also be applied to a waterproof electronic control device.

  In this embodiment, the example which fills the solder 90 in the through-hole 33 in the application | coating process was shown. However, when the surface portions 34a and 35a and the wall surface portions 34b and 35b are integrally formed as one land 34 and 35, the through hole 33 is not filled with the solder 90, and only on the surface portions 34a and 35a. Solder 90 may be disposed on the substrate. In this case, in the reflow process, the solder 90 on the surface portions 34a and 35a flows into the through hole 33 due to gravity or capillary action, so that the wall surface portions 34b and 35b and the insertion mounting portions 71e and 72e are connected. It can be. However, only the solder 90 on the surface portions 34a and 35a ensures a good bonding state between the surface portions 34a and 35a and the surface mounting portions 71d and 72d, and the wall surface portions 34b and 35b and the insertion mounting portions 71e and 72e. Therefore, as described above, it is preferable to fill the through hole 33 with the solder 90 as described above.

  In this embodiment, the example which fills the solder 90 in the through-hole 33 in the application | coating process was shown. Thus, if it is the through-hole 33, it will be easy to fill the solder 90 in a hole. However, at the time of reflow mounting, for example, as shown in FIG. 25A, it is conceivable that the terminal 71 floats, the contact area between the surface mounting portion 71d and the solder 90 decreases, and the connection reliability decreases. Thus, when the terminal 71 floats at the time of reflow mounting, as shown in FIG. 25B, for example, as shown in FIG. Member) is fixed and the opening of the through hole 33 is preferably covered. If it does in this way, the air confine | sealed in the through-hole 33 by the heat | fever at the time of reflow will expand | swell, and the solder 90 in the through-hole 33 will be pushed up to the housing arrangement | positioning surface side by this. Therefore, the contact area between the solder 90 and the mounting portion (the surface mounting portion 71d and the insertion mounting portion 71e) of the terminal 71 can be ensured, and as a result, connection reliability can be ensured. If the lid member 130 is fixed, the air in the through hole 33 may expand and contract due to temperature changes in the usage environment, which may affect the connection reliability. Therefore, it is preferable to remove after reflow. FIG. 25A is a cross-sectional view as a comparative example, and FIG. 25B is a cross-sectional view showing a modification.

It is an exploded view which shows the state before an assembly | attachment for demonstrating schematic structure of the electronic controller which concerns on 1st Embodiment. It is a top view of the mounting part periphery of the state which mounted the connector in the printed circuit board. It is the top view which looked at the state which mounted the connector in the printed circuit board from the connection side of a printed circuit board and a terminal. It is the top view which looked at the state which mounted the connector in the printed circuit board from the connection side with an external connector. FIG. 5 is an enlarged plan view of the area surrounded by the broken line in FIG. 2 on the housing arrangement surface side. FIG. 3 is an enlarged plan view of a housing arrangement surface of a printed circuit board in a region surrounded by a broken line in FIG. 2. FIG. 3 is an enlarged plan view showing a back side of a housing arrangement surface of a printed circuit board in a region surrounded by a broken line in FIG. 2. It is sectional drawing which follows the VIII-VIII line shown in FIG. (A) is typical sectional drawing which follows the IX-IX line of FIG. 8, (b) is typical sectional drawing which shows the comparative example of (a). It is a figure which shows the application | coating process which is a characteristic part among the manufacturing processes of an electronic control apparatus, (a) is a 1st process among application processes, (b) is a 2nd process among application processes, (c) is application | coating. It shows after the completion of the process. It is a top view which shows the positional relationship between the land connected with a terminal, and the opening part corresponding to the land of the screen used in a coating process. It is a top view of the printed circuit board which shows a modification. It is sectional drawing which shows a modification. It is sectional drawing which shows a modification. It is an expanded sectional view of a mounting part periphery of a printed circuit board and a connector among electronic control units concerning a 2nd embodiment. It is sectional drawing which follows the XVI-XVI line | wire of FIG. It is sectional drawing which follows the XVII-XVII line of FIG. It is sectional drawing as a comparative example. It is sectional drawing as a comparative example. It is an expanded sectional view of a mounting part periphery of a printed circuit board and a connector among electronic control units concerning a 3rd embodiment. It is sectional drawing which shows a modification. It is an expanded sectional view of a mounting part periphery of a printed circuit board and a connector among electronic control units concerning a 4th embodiment. It is an expanded sectional view of a mounting part periphery of a printed circuit board and a connector among electronic control units concerning a 5th embodiment. It is sectional drawing which shows an application | coating process. It is sectional drawing which shows a modification.

Explanation of symbols

1 ... Electronic control device (electronic device)
31 ... Printed circuit board 33 ... Through hole 34 ... First land 34a ... Surface portion 34b ... Wall surface portion 34c ... Back surface portion 35 ... Second land 35a ... Surface portion 35b ... wall surface part 35c ... back surface part 50 ... connector (electronic component)
60 ... Housing (main body)
70 ... terminals 71, 72 ... power terminals 71a ... third parallel part 71b ... second connecting part 71d ... surface mounting part 71e ... insertion mounting part 72a ... first parallel Part 72b ... 1st connection part 72c ... 2nd parallel part 72d ... Surface mounting part 72e ... Insertion mounting part 73-76 ... Signal terminal 90 ... Solder

Claims (20)

A printed circuit board having a land;
With respect to the main body made of an electrically insulating material, a plurality of terminals are provided with electronic components arranged along the surface of the printed circuit board,
The electronic device in which the main body is disposed on the surface of the printed circuit board, the terminals are reflow soldered to the corresponding land, and the electronic component is mounted on the printed circuit board.
As the lands, a plurality of first lands arranged in a line along the arrangement direction of the terminals, and arranged in a line along the arrangement direction of the terminals at a position farther from the main body than the first land. A plurality of second lands, wherein the first lands and the second lands are staggered,
The terminal connected to the second land is substantially parallel to the surface of the printed circuit board, and is substantially parallel to the surface of the printed circuit board, the first parallel part being at least partially fixed to the main body. The second parallel part, which is exposed from the main body part and is connected to the mounting portion with the second land, is connected to the end part far from the main body part, and the first parallel part and the second parallel part are connected. A first connecting portion;
The first parallel part is all disposed within the main body part, or the length of the part exposed from the main body part to the land formation side is shorter than the second parallel part. And
The electronic device according to claim 1, wherein the second parallel portion is positioned closer to the surface of the printed board than the first parallel portion in a direction perpendicular to the surface of the printed board.   The terminal connected to the first land has a third parallel part that is substantially parallel to the surface of the printed circuit board and at least a part of which is fixed to the main body part, and the third parallel part is connected to one end, It has a second connecting part directly to the other end, or a second connecting part connected to the mounting part with the first land through a part that is substantially parallel to the surface of the printed circuit board and exposed from the main body part. The electronic device according to claim 1, characterized in that:   3. The electron according to claim 2, wherein the third parallel part is located farther from the surface of the printed circuit board than the second parallel part on the same side with respect to the surface of the printed circuit board. apparatus.   The first connection part and the second connection part are substantially perpendicular to the surface of the printed circuit board, and are alternately arranged along the arrangement direction of the terminals. The electronic device according to claim 2 or 3. The first connection part and the second connection part are substantially perpendicular to the surface of the printed circuit board, and are arranged in a line along the arrangement direction of the terminals, respectively.
The electronic device according to claim 2, wherein the first connection portion and the second connection portion are arranged in a staggered arrangement.   In a direction perpendicular to the surface of the printed circuit board, the first parallel portion and the third parallel portion are different from each other, and the first parallel portion is disposed at least one stage relative to the main body portion, and 6. The electronic device according to claim 5, wherein at least one three parallel portions are arranged.   In the direction perpendicular to the arrangement direction of the terminals and along the surface of the printed circuit board, of the first connection part and the second connection part, the connection part that is close to the second land, A portion excluding a portion on the mounting portion side with respect to the land, and a portion further away from the surface of the printed circuit board than the connecting portion positioned far from the second land is held by the main body portion. The electronic device according to claim 6.   The electronic device according to claim 6, wherein the first parallel portion is located farther from the surface of the printed board than the third parallel portion.   The first connecting portion is positioned closer to the second land than the second connecting portion in a direction perpendicular to the arrangement direction of the terminals and along the surface of the printed circuit board. The electronic device according to claim 8.   The electronic device according to claim 9, wherein the second connection part includes a stress relaxation part that relaxes stress between the third parallel part and the mounting part of the first land. In a direction perpendicular to the surface of the printed circuit board, the first parallel portion and the third parallel portion are different from each other, and the first parallel portion is disposed at least one stage relative to the main body portion, and 3 parallel parts are arranged in at least one stage,
The electronic device according to claim 4, wherein the third parallel part is positioned farther from the surface of the printed circuit board than the first parallel part.   As at least one of the terminal connected to the first land and the terminal connected to the second land, the terminal is substantially perpendicular to the surface of the printed board and inserted into a through hole provided in the printed board. The terminal having at least an insertion portion that is reflow soldered to the corresponding land provided around the wall surface and the opening of the through hole as a mounting portion with the land is used. 11. The electronic device according to any one of 11 above.   In the land corresponding to the terminal having the insertion portion, the size of the peripheral portion of the opening along the surface of the printed circuit board is larger than the back side of the arrangement surface of the main body portion on which the terminals having the insertion portion are arranged. The electronic device according to claim 12, wherein the main body portion arrangement surface side is larger.   Among the lands corresponding to the terminals having the insertion portion, the size of the back surface side of the main body portion arrangement surface in the peripheral portion of the opening is larger than the maximum tolerance of the hole diameter of the through hole. The electronic device according to claim 13. As the terminal, the insertion portion and a surface portion that is connected to the insertion portion and is substantially parallel to the surface of the printed circuit board are provided as mounting portions with the land, and are provided on the printed circuit board. In a state in which the insertion portion is inserted into the through hole, the corresponding land provided around the wall surface and the opening of the through hole includes a branched terminal to which the surface portion and the insertion portion are reflow soldered,
In the direction perpendicular to the terminal arrangement direction and along the surface of the printed circuit board, the insertion portion is positioned farther from the main body than the surface portion, or between both ends of the surface portion. The electronic device according to claim 12, wherein the electronic device is provided.   The electronic device according to claim 15, wherein the insertion portion is positioned at a center with respect to both ends of the surface portion.   The tip of the insertion portion is inserted into the through hole, and is located at the same position as the back surface of the main body portion arrangement surface, or between the electronic component arrangement surface and the back surface. The electronic device according to claim 15 or 16.   17. The electronic device according to claim 12, wherein a distal end of the insertion portion protrudes toward a back surface side of the main body portion arrangement surface in a state of being inserted into the through hole. As the main body portion, disposed on one surface of the printed circuit board, disposed on the back surface of the first main body portion disposed on the printed circuit board, and a first main body portion on which terminals to be connected to the first lands are arranged. And a second body portion on which terminals connected to the second land are arranged,
The terminal has at least the insertion portion as a mounting portion with the land,
Of the terminals connected to the first land and the terminals connected to the second land, the tip of the insertion portion of one of the terminals is inserted into the through-hole and corresponds to the arrangement surface of the main body portion. It is the same position as the back surface, or a position between the main body portion arrangement surface and the back surface, and the other end of the insertion portion of the terminal protrudes to the back surface side of the corresponding main body portion arrangement surface. The electronic device according to any one of claims 12 to 18, characterized in that: The tip of the insertion portion of the terminal connected to the first land is in the same position as the back surface of the first main body portion arrangement surface in a state inserted into the through hole, or the first main body portion arrangement surface and the back surface thereof. And the position between
The electronic device according to claim 19, wherein a distal end of an insertion portion of a terminal connected to the second land protrudes on a back surface side of the second main body portion arrangement surface.

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