JP2014110224A - Holding member and connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent breakage of a leg, while ensuring the connector holding strength, in a holding member including a leg being inserted into a through hole and reflow soldered.SOLUTION: A holding member (26) includes a base (40) fixed to a connector (20), and a leg (42) extending from the base toward a through hole (30). One leg is inserted into one through hole, and a first leg (44) is reflow soldered as the leg, and projects to the back side (16b). The first leg has an insertion part (46) inserted into the through hole, and a linking part (48) for linking the insertion part and the base. In the insertion part, a cross-sectional area at the same position as one side is S1b, a cross-sectional area at the same position as the back side is S1s, and a minimum cross-sectional area of the linking part is S2s. The first leg is formed to satisfy the relations; S1b>S1s and S2s>S1s.

Description

  The present invention relates to a holding member that is inserted into a through hole of a printed board and is reflow soldered to hold a connector on the printed board, and a connector including the holding member.

  In recent years, from the viewpoint of cost reduction, efforts have been made to solder all components mounted on a printed circuit board through a common application process and reflow process. At that time, even for a component having a structure in which the terminal is inserted into the through hole, the terminal is inserted into the through hole and reflowed in a state where the solder paste is applied around the through hole from one surface side of the printed board.

  Patent Document 1 describes a holding member that is reflow soldered as a holding member that holds a connector on a printed circuit board. The holding member includes a base portion fixed to the electronic component and a leg portion extending from the base portion toward the through hole. And a leg part is inserted in a through-hole and reflow soldering is carried out.

Japanese Patent No. 4626680

  In patent document 1, the part inserted in the through-hole of a leg part is flat form, and the width | variety is also constant. For example, as an example, the second leg portion described in FIG. 19 of Patent Document 1 protrudes to the back side of the printed circuit board and has substantially the same width to the tip.

  Here, among the portions arranged in the through holes in the leg portions, a portion that is located at the same position as one surface of the printed board is indicated as a first end portion, and a portion that is located at the same position as the back surface is indicated as a second end portion. To do. If the width of the second end portion of the conventional leg portion is wide, a large amount of solder paste may be pushed by the leg portion when the second end portion is inserted into the through hole, and may fall off from the printed circuit board. Even if it does not fall off, for example, the solder paste adhering to the tip end side of the leg part may be separated from the solder paste in the through hole and remain separated even after reflowing. Thus, there is a possibility that the amount of solder for connecting the printed circuit board and the holding member is insufficient, and sufficient connector holding strength cannot be obtained.

  On the other hand, if the width of the second end portion of the conventional leg portion is narrow, the amount of solder paste pushed by the leg portion when inserted into the through hole can be reduced, and the solder paste can be prevented from falling off. However, since the width is constant, the width of the first end portion is also narrowed. For this reason, the contact area of a leg part becomes small with respect to the solder which connects a printed circuit board and a leg part, and there exists a possibility that sufficient connector holding strength cannot be obtained.

  Further, in the holding member, the base portion is fixed to the connector, and the portion disposed in the through hole and the vicinity thereof in the leg portion are connected to the solder. For this reason, when stress acts on the holding member, the stress concentrates on a portion of the leg portion between the solder connection portion and the base portion. As described above, if the width of the leg portion is narrow, there is a possibility that breakage may occur at the location due to stress concentration.

  In view of the above problems, an object of the present invention is to suppress breakage of a leg portion while securing connector holding strength in a holding member provided with a leg portion that is inserted into a through-hole and reflow-soldered. .

In order to achieve the above object, the present invention provides:
A holding member inserted into the through hole (30) of the printed circuit board (16) and reflow soldered to hold the connector (20) on the printed circuit board,
A base (40) disposed on one side of the one side (16a) of the printed board and the back side (16b) opposite to the one side and fixed to the connector;
And at least one leg (42) formed integrally with the base by processing the same metal plate and extending from the base toward the through hole,
One leg is inserted into one through hole,
As a leg, it has reflow soldering and has at least one first leg (44) whose tip protrudes toward the back surface (16b),
The first leg portion has an insertion portion (46) to be inserted into the through hole and a connecting portion (48) for connecting the insertion portion and the base portion. The portion on the tip side from the first end (46a) that is the same position as the insertion portion, is the insertion portion,
In the insertion part, if the cross-sectional area of the first end is S1b, the cross-sectional area of the second end (46b) that is the same position as the back surface is S1s, and the minimum cross-sectional area of the connecting part is S2s,
S1b> S1s and S2s> S1s,
The first leg is formed so as to satisfy the above condition.

  According to this, since only one leg (42) is disposed in one through hole (30), the diameter of the through hole (30) into which the first leg (44) is inserted is reduced. Can do. Thereby, the difference of the hole diameter of a through-hole (30) and the hole diameter of the through-hole in which the terminal of another component is inserted becomes small. Therefore, even if the solder paste is applied to the through holes corresponding to other components and the through holes (30) in a lump, the solder paste can be prevented from dropping from the through holes (30).

  Further, since S1b> S1s, for example, the extrusion of the solder paste to the back surface (16b) side can be suppressed as compared with the case where the width of the second end portion (46b) is equal to S1b. Further, for example, the contact area with the solder (34) can be increased as compared with the case where the width of the first end (46a) is equal to S1s.

  Moreover, since S2s> S1s, even if stress concentrates on the portion of the joint portion (48) that is not covered with the solder (34), the occurrence of breakage can be suppressed.

  Thus, according to the present invention, in the holding member having the first leg portion (44) inserted into the through hole (30) and reflow soldered, the first leg is secured while ensuring the connector holding strength. Breakage of the portion (44) can be suppressed.

  Further, according to a further feature of the present invention, the first leg (46a) has a cross-sectional area S1b and a minimum value S2s of the cross-sectional area of the connecting portion (48) satisfying S2s ≧ S1b. 44) is formed.

  According to this, the intensity | strength of a connection part (48) can be improved and breakage can be suppressed more effectively.

Further, according to a further feature of the present invention, in the insertion portion (46), the cross-sectional area of the arbitrary first position in the extending direction is S1u, and the arbitrary second position farther from the base portion (40) than the first position. If the cross-sectional area is S1d,
S1u ≧ S1d,
The first leg (44) is formed so as to satisfy the above.

  According to this, in order to satisfy S1u ≧ S1d, the extrusion of the solder paste to the back surface (16b) side is suppressed not only in the portion arranged in the through hole (30) but also in the entire insertion portion (46). Can do.

Further, a further feature of the present invention is that the width in the width direction perpendicular to both the plate thickness direction and the extending direction of the base portion (40) is the width,
In the insertion part (46), the width of the first position is W1u, the width of the second position is W1d, the width of the first end part (46a) is W1b, and the width of the second end part (46b) is W1s. If the minimum width in (48) is W2s,
W1u ≧ W1d, W1b> W1s, and W2s ≧ W1b,
The first leg (44) is formed so as to satisfy the above.

  Thus, the 1st leg part (44) which satisfy | fills the relationship of above-described cross-sectional area can be formed by making it satisfy | fill the said relationship. In addition, if it is made to satisfy | fill the relationship of the said cross-sectional area only by width, since it is not necessary to press a metal plate, a manufacturing process can be simplified.

  In particular, when the first leg portion (44) is formed so that the maximum width W2b of the connecting portion (48) and the width W1b of the first end portion (46a) satisfy W2b> W1b, The strength of the portion (48) can be improved and breakage can be more effectively suppressed.

Further, according to a further feature of the present invention, the first leg portion (44) includes a step portion (54) provided along the extending direction while having a step in the plate thickness direction,
The step portion is such that the end on the base (40) side is not covered with the solder (34) and the end on the tip side of the first leg is covered with the solder.

  According to this, when the width is the same, the cross-sectional area can be increased by providing the step portion (54). Accordingly, the contact area with the solder (34) increases, and the connector holding strength can be improved. On the other hand, when the cross-sectional areas are the same, the width can be reduced by the provision of the step portion (54), so that the diameter of the through hole (30) can be reduced. Thereby, the difference of the hole diameter with the through-hole in which another component is inserted can be made small.

It is a figure which shows schematic structure of the electronic control apparatus provided with the holding member and connector which concern on 1st Embodiment. It is the top view to which the holding member periphery was expanded among circuit boards. It is sectional drawing which follows the III-III line of FIG. It is a perspective view which shows schematic structure of a holding member. It is the figure which expanded the periphery of the part reflow soldered in the mounting structure of a holding member. It is sectional drawing which shows the mounting structure of the holding member which concerns on 2nd Embodiment, and respond | corresponds to FIG. It is sectional drawing which shows the mounting structure of the holding member which concerns on 3rd Embodiment, and respond | corresponds to FIG. It is a perspective view which shows schematic structure of the holding member which concerns on 4th Embodiment, and respond | corresponds to FIG. It is sectional drawing which follows the IX-IX line of FIG. It is sectional drawing which shows the mounting structure of a holding member, and respond | corresponds to FIG. It is sectional drawing which follows the XI-XI line of FIG. It is sectional drawing which shows the mounting structure of the holding member which concerns on 5th Embodiment, and respond | corresponds to FIG. It is sectional drawing which follows the XIII-XIII line | wire of FIG. It is a top view which shows schematic structure of the holding member which concerns on 6th Embodiment. It is sectional drawing which follows the XV-XV line | wire of FIG. It is a figure which shows the formation method of the holding member shown in FIG. It is sectional drawing which shows the mounting structure of the holding member which concerns on 7th Embodiment, and respond | corresponds to FIG. It is sectional drawing which follows the XVIII-XVIII line of FIG. It is sectional drawing which follows the XIX-XIX line | wire of FIG. It is a perspective view which shows schematic structure of the holding member which concerns on 8th Embodiment. It is a figure which shows the formation method of the holding member shown in FIG. It is sectional drawing which shows the mounting structure of a holding member, and respond | corresponds to FIG. It is the figure which expanded the periphery of the part reflow soldered in the mounting structure of a holding member. It is sectional drawing which follows the XXIV-XXIV line of FIG. It is sectional drawing which shows the mounting structure of the holding member which concerns on 9th Embodiment, and respond | corresponds to FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, common or related elements are given the same reference numerals. Further, the extending direction of the legs with respect to the base, in other words, the thickness direction of the printed circuit board is hereinafter simply referred to as the extending direction. Further, the plate thickness direction of the base portion, in other words, the arrangement direction of the terminals in the connector is hereinafter simply referred to as the plate thickness direction. In addition, a direction orthogonal to both the extending direction and the plate thickness direction is hereinafter simply referred to as a width direction. The plate thickness direction and the width direction are both parallel to one surface of the printed board.

(First embodiment)
First, a schematic configuration of an electronic control device including a holding member and a connector according to the present embodiment will be described with reference to FIG. In FIG. 1, for the sake of convenience, a state where the housing is disassembled is illustrated.

  An electronic control device 10 shown in FIG. 1 is configured as a non-waterproof electronic control device, and is used, for example, as an engine ECU (Electric Control Unit) of a vehicle. The electronic control device 10 includes a housing 12 and a circuit board 14 accommodated in the housing 12 as main parts.

  The housing 12 is made of a metal material such as aluminum or iron, or a resin material, and accommodates the circuit board 14 therein to protect it. The number of constituent members of the housing 12 is not particularly limited, and may be composed of one member or a plurality of members.

  As shown in FIG. 1, the housing 12 of the present embodiment is divided into two in the extending direction and has a shallow box-like case 12 a whose one surface is open, and a cover 12 b that closes an opening portion of the case 12 a. It has two members. When the case 12a and the cover 12b are assembled with, for example, screws, the housing 12 having an internal space for accommodating the circuit board 14 is obtained.

  The circuit board 14 is configured by mounting electronic components 18 such as a microcomputer, a power transistor, a resistor, and a capacitor on a printed board 16 to form a circuit. The electronic component 18 is disposed on at least one of the one surface 16a of the printed board 16 and the back surface 16b opposite to the one surface 16a. In the present embodiment, electronic components 18 are mounted on both surfaces 16 a and 16 b of the printed circuit board 16.

  In addition to the electronic component 18 described above, a connector 20 that electrically relays a circuit configured on the circuit board 14 and an external device is mounted on the printed board 16. The connector 20 includes a terminal 22 made of a conductive material and a housing 24 that is formed using an electrically insulating material such as a resin and holds the terminal 22.

  In the present embodiment, the terminal 22 is inserted into a through-hole (not shown) formed in the printed circuit board 16 and is electrically connected to the land formed on the wall surface of the through-hole and the opening edge via solder. Moreover, although the terminal 22 is an insertion mounting structure, it is reflow soldered. A terminal 22 having a surface mounting structure can also be employed.

  The connector 20 includes a holding member 26. In the present embodiment, as shown in FIG. 2, holding members 26 are fixed in the vicinity of both end portions 24 a of the housing 24 so as to sandwich a plurality of terminals 22 therebetween in the thickness direction.

  Next, the holding member 26 that is a characteristic part of the present embodiment will be described with reference to FIGS. In FIG. 3, for convenience, the dummy land is omitted.

  As shown in FIG. 3, the holding member 26 is inserted into a corresponding through hole 30 of the printed board 16 and reflow soldered to hold the connector 20 on the printed board 16. As shown in FIG. 5, dummy lands 32 that do not provide an electrical connection function are formed on the wall surface and opening edge of the through hole 30 of the printed circuit board 16. In the present embodiment, the dummy land 32 is formed by copper plating, like the land corresponding to the terminal 22 of the connector 20. The holding member 26 is mechanically connected to the dummy land 32 by the solder 34 in a state where a part of the holding member 26 is inserted into the through hole 30.

  As shown in FIG. 4, the holding member 26 is formed by processing a metal plate having a predetermined thickness, and includes a base 40 and at least one leg 42 extending from the base 40. ,have.

  The base 40 is a fixed portion of the holding member 26 to the housing 24, and is disposed on the one surface 16 a of the printed board 16. In the present embodiment, the base portion 40 has a flat plate shape, a rectangular portion 40a whose planar shape along the width direction and the extending direction is substantially rectangular, and a bifurcated portion 40b that extends from the rectangular portion 40a in the width direction. And have. The base portion 40 is inserted into the groove portion 24 c opened to the front surface 24 b side of the housing 24 with the bifurcated portion 40 b at the head, and is fixed to the housing 24.

  The leg portion 42 is formed to extend from the rectangular portion 40a of the base portion 40 toward the through hole 30, that is, in the extending direction. The leg part 42 includes at least one first leg part 44.

  The first leg portion 44 is provided so as to pass through the through hole 30 and a part of the first leg portion 44 protrudes to the back surface 16 b side. The insertion portion 46 to be inserted into the through hole 30, the insertion portion 46 and the base portion 40. And a connecting portion 48 for connecting the two. The insertion portion 46 is a portion on the tip side from the first end portion 46a that is in the same position as the one surface 16a in the extending direction in a state where it is soldered to the corresponding dummy land 32.

  As shown in FIGS. 3 to 5, the insertion portion 46 is a portion from the first end portion 46 a to the second end portion 46 b that is located at the same position as the back surface 16 b, that is, a portion disposed in the through hole 30. And a protrusion 46c protruding toward the back surface 16b. In the present embodiment, the first leg portion 44 is also flat. That is, the entire holding member 26 has a flat plate shape that does not have a bent portion.

  Here, in the insertion portion 46, the cross-sectional area of the first end 46a is S1b, and the cross-sectional area of the second end 46b is S1s. Further, the minimum value of the cross-sectional area at the connecting portion 48 is S2s. Then, the first leg portion 44 is formed to satisfy at least S1b> S1s and S2s> S1s.

  Further, in the present embodiment, when the cross-sectional area at an arbitrary first position in the extending direction is S1u, and the cross-sectional area at an arbitrary second position farther from the base 40 than the first position is S1d, S1u ≧ S1d, The 1st leg part 44 is formed so that it may satisfy | fill. That is, the cross-sectional area of the portion of the insertion portion 46 disposed in the through hole 30 is such that the cross-sectional area S1b of the first end portion 46a is the maximum and the cross-sectional area S1s of the second end portion 46b is the minimum. A first leg 44 is formed. Further, the first leg portion 44 is formed so as to satisfy S2s ≧ S1b.

  Here, in the present embodiment, the first leg portion 44 has a flat plate shape, the plate thickness is constant, and there is no step in the plate thickness direction. Therefore, as shown in FIG. 5, in the insertion portion 46, the width of the first position is W1u, the width of the second position is W1d, the width of the first end portion 46a is W1b, and the width of the second end portion 46b. The width is W1s. In addition, in the connecting portion 48, the minimum value of the width is set to W2s.

  Then, the first leg portion 44 is formed so as to satisfy W1u ≧ W1d, W1b> W1s, and W2s ≧ W1b in order to satisfy the above-described cross-sectional area relationship. Moreover, the hole diameter of the through hole 30 is made larger than the width W1b of the first end 46a. For convenience, in FIG. 5, the corresponding cross-sectional area is shown in parentheses after the width notation.

  Specifically, the first leg portion 44 extends in a straight line along the extending direction. The connecting portion 48 has a constant width from the connecting end with the base portion 40 to the middle portion of the through hole 30. That is, the width W2 of the connecting portion 48 is constant over its entire length, and this width W2 is W2s. Further, the width W1b of the first end portion 46a is equal to the width W2s.

  In addition, the insertion portion 46 has a constant width that is narrower at the tip than at the width W1b (= W2s). For this reason, in the part arrange | positioned in the through-hole 30, the width W1b of the 1st end part 46a is the maximum width, and the width W1s of the 2nd end part 46b is the minimum width. That is, in the portion disposed in the through hole 30, the cross-sectional area S1b of the first end 46a is the maximum cross-sectional area, and the cross-sectional area S1s of the second end 46b is the minimum cross-sectional area. As described above, the width of the insertion portion 46 changes in two stages in the through hole 30, whereby the insertion portion 46 has a shoulder portion 50 parallel to a plane defined by the width direction and the plate thickness direction. Have. In this embodiment, the insertion part 46 has the shoulder part 50 in the both ends of the width direction, and is extended from the center part pinched by the shoulder part 50 by the fixed width | variety by the back surface 16b side.

  For such a holding member 26, the solder 34 is disposed in the through hole 30, and the portion of the insertion portion 46 from the first end portion 46 a to the second end portion 46 b, that is, in the through hole 30. Connected to the part. Further, the solder 34 has a fillet on the one surface 16a side of the printed circuit board 16, and is also connected to a part from a connecting end of the connecting portion 48 with the first end portion 46a as shown in FIG. The solder 34 also has a fillet on the back surface 16b side, and is also connected to a part of the protruding portion 46c in the insertion portion 46 as shown in FIG.

  Next, a method for fixing the holding member 26 described above, in other words, a method for forming the circuit board 14 will be briefly described.

  First, a metal plate is punched to prepare a holding member 26 having a predetermined shape. And the holding member 26 is fixed to the housing 24 of the connector 20 prepared separately.

  Next, a solder paste that will later become the solder 34 is applied by screen printing onto the dummy land 32 including the through hole 30 from the one surface 16a side. In this screen printing, solder paste is applied not only to the through hole 30 (dummy land 32) corresponding to the holding member 26 but also to the through hole (land) corresponding to the terminal 22 of the connector 20 and the land of other electronic components 18. Apply. In this way, screen printing is performed on the holding member 26, the connector 20, and the electronic component 18 in a lump.

  Next, the first leg portion 44 of the holding member 26 is inserted into the through hole 30 while pressing the solder paste toward the back surface 16b. At this time, the terminal 22 of the connector 20 is also inserted into the corresponding through hole. Further, the electronic component 18 is placed on the solder paste of the corresponding land.

  The holding member 26, the connector 20, and the electronic component 18 are collectively reflowed. As a result, the holding member 26 is fixed to the printed circuit board 16. Further, the terminal 22 of the connector 20 is electrically connected to the corresponding land, and the electronic component 18 is also electrically connected to the corresponding land. Thus, the circuit board 14 can be obtained.

  Next, the effect of the characteristic part of the holding member 26 and the connector 20 according to the present embodiment will be described.

  In the present embodiment, only one leg portion 42 is disposed in one through hole 30. Therefore, the hole diameter of the through hole 30 into which the first leg portion 44 is inserted can be reduced. Thereby, the difference of the hole diameter of the through-hole 30 and the hole diameter of the through-hole in which the terminal of another component is inserted can be made small. Specifically, the difference between the hole diameter of the through hole into which the terminal 22 of the connector 20 is inserted and the hole diameter of the through hole 30 can be reduced. For example, when the diameter of the terminal 22 is 0.5 mm and the hole diameter of the through hole corresponding to the terminal 22 is 0.9 mm, the width W1s of the second end 46b is 0.5 mm and the width W1b of the first end 46a is 1. The hole diameter of the through hole 30 can be about 1.2 mm to 1.4 mm. Therefore, the reflow solder paste can be applied to the through holes 30 corresponding to other components such as the connector 20 and the through holes 30 in a lump.

  If the difference in the hole diameter is large, that is, the hole diameter of the through hole 30 is large, there is a possibility that more solder paste is pushed into the through hole 30 due to the longer travel distance of the squeegee and the solder paste falls off the through hole 30. is there. According to the present embodiment, as described above, the difference in the hole diameters can be reduced, so that the solder paste can be prevented from falling off from the through holes 30.

  Further, in the present embodiment, the width of the first leg portion 44 is W1b> W1s as shown in FIG. 5 while reducing the hole diameter of the through hole 30, thereby the first leg portion. The cross-sectional area of 44 is S1b> S1s. Therefore, for example, when the insertion portion 46 is inserted into the through-hole 30, the solder paste is pushed out to the back surface 16b side as compared with the case where the width W1s of the second end portion 46b is equal to the width W1b of the first end portion 46a. Can be suppressed. As a result, it is possible to suppress the solder paste from dropping from the through-holes 30, and thus to suppress a shortage of solder amount connecting the holding member 26 and the printed circuit board 16 (dummy land 32). Therefore, for example, when the insertion portion 46 is inserted into the through-hole 30, the solder paste is pushed out to the back surface 16b side as compared with the case where the width W1s of the second end portion 46b is equal to the width W1b of the first end portion 46a. Can be suppressed. As a result, it is possible to suppress the solder paste from dropping from the through-holes 30, and thus to suppress a shortage of solder amount connecting the holding member 26 and the printed circuit board 16 (dummy land 32).

  Further, since S1b> S1s, for example, the contact area with the solder 34 can be increased as compared with the case where the width W1b of the first end 46a is equal to the width W1s of the second end 46b. . As described above, by setting S1b> S1s, the holding member 26 can have sufficient connector holding strength.

  In particular, in the present embodiment, the insertion portion 46 satisfies W1u ≧ W1d, and thereby satisfies S1u ≧ S1d. And the cross-sectional area of the part arrange | positioned in the through-hole 30 among the insertion parts 46 has the largest cross-sectional area S1b of the 1st end part 46a, and the cross-sectional area S1s of the 2nd end part 46b is the minimum. Therefore, for example, when the insertion portion 46 is inserted into the through-hole 30 in comparison with the case where the cross-sectional area of the portion disposed in the through-hole 30 is S1b in the entire length, the solder paste is pushed more effectively to the back surface 16b side. Can be suppressed. Moreover, extrusion of the solder paste by the protruding portion 46c protruding to the back surface 16b side can be suppressed. As described above, the extrusion of the solder paste to the back surface 16b side can be suppressed not only in the portion arranged in the through hole 30 but also in the entire insertion portion 46 including the protruding portion 46c.

  Further, since S1u ≧ S1d, for example, the cross-sectional area of the portion disposed in the through hole 30 is W1s in the entire length, that is, the contact area with the solder 34 is increased as compared with the case where the cross-sectional area is S1s in the total length. Can be made. Thereby, the connector holding strength of the holding member 26 can also be improved.

  In particular, in the present embodiment, the insertion portion 46 protrudes toward the back surface 16b, and the solder paste can be easily pushed out during insertion as compared with a configuration in which the insertion portion 46 does not protrude toward the back surface 16b. However, this satisfies the relationship between the width and the cross-sectional area. The solder paste can be prevented from falling off. Even if it does not fall off, a large amount of solder paste adheres to the vicinity of the tip of the first leg portion 44, and this solder paste may be separated from the solder paste in the through hole 30 even after reflow. On the other hand, in this embodiment, since the 1st leg part 44 satisfy | fills the relationship of the width | variety mentioned above and by extension, sectional area, extrusion of the solder paste to the back surface 16b side can be suppressed and by extension, isolation | separation can be suppressed. . This also ensures the amount of solder.

  By the way, in the holding member 26, the base portion 40 is fixed to the connector 20, and a portion of the first leg portion 44 disposed in the through hole 30 and a portion in the vicinity thereof are connected to the solder 34. For this reason, when stress acts on the holding member 26, the stress concentrates on the portion of the first leg portion 44 between the solder connection portion and the base portion 40, particularly the narrowest portion. On the other hand, in this embodiment, the 1st leg part 44 is formed so that S2s> S1s may be satisfy | filled. As described above, since the connecting portion 48 has a larger cross-sectional area than the second end portion 46b, even if stress is concentrated on a portion of the connecting portion 48 that is not covered with the solder 34, occurrence of breakage can be suppressed.

  In particular, in the present embodiment, the first leg portion 44 is formed so as to satisfy S2s ≧ S1b. Specifically, W2s = W1b, and thus, S2s = S1b. That is, the connecting portion 48 has the same cross-sectional area as the first end portion 46a. Therefore, breakage can be more effectively suppressed.

  In the present embodiment, the protruding height of the first leg portion 44 on the back surface 16b is higher than the protruding height of the terminal 22 of the connector 20 on the back surface 16b. For this reason, the first leg portion 44 is inserted into the through hole 30 before the terminal 22 of the connector 20 is inserted into the corresponding through hole. Therefore, the first leg portion 44 exhibits a positioning effect with respect to the terminal 22. Thereby, the bending of the terminal 22, peeling of the plating layer which is a land, etc. can be suppressed.

(Second Embodiment)
In the present embodiment, the description of the parts common to the holding member 26, the connector 20, and the electronic control device 10 described in the above embodiment is omitted.

  In the present embodiment, as shown in FIG. 6, at least a part of the first leg portion 44 has a tapered shape whose width becomes narrower as the distance from the base portion 40 increases in the extending direction. In addition, at least a part of the tapered portion of the first leg portion 44 is disposed in the through hole 30. Also in this embodiment, the 1st leg part 44 is flat form. For convenience, in FIG. 6, the corresponding cross-sectional area is shown in parentheses after the width notation.

  In the example shown in FIG. 6, the portion from the tip of the first leg portion 44 to the connecting end with the base portion 40, that is, the entire insertion portion 46 and connecting portion 48 is tapered. This taper shape has a constant amount of change in width per unit length in the extending direction. Also, both sides in the width direction are each tapered, and the amount of change is substantially the same.

  When such a tapered shape is employed, the width W2 of the connecting portion 48 becomes W2s which is the minimum value at the connecting end with the insertion portion 46, and becomes wider as the base portion 40 is approached. The width W2 is the maximum width W2b at the connecting end with the base 40, although not shown.

  On the other hand, the width of the insertion portion 46 is wider as it is closer to the base portion 40, that is, the entire length satisfies W1u> W1d. Therefore, in the portion disposed in the through hole 30, the width W1b of the first end portion 46a is the maximum width, and the width W1s of the second end portion 46b is the minimum width. Thereby, in the part arrange | positioned in the through-hole 30, the cross-sectional area S1b of the 1st end part 46a becomes the largest cross-sectional area, and the cross-sectional area S1s of the 2nd end part 46b becomes the minimum cross-sectional area.

  Therefore, in the present embodiment, the width of the first leg portion 44 is W1u> W1d, W1b> W1s, W2s = W1b, and thus the cross-sectional area of the first leg portion 44 is S1u> S1d. , S1b> S1s, S2s = S1b. In addition, W2b> W1b is satisfied, whereby the maximum cross-sectional area S2b in the connecting portion 48 satisfies S2b> S1b.

  When such a holding member 26 is employed, in addition to the effects described in the first embodiment, when the insertion portion 46 is inserted into the through hole 30, the solder paste escapes around the insertion portion 46 due to the tapered shape. Therefore, compared with the 1st leg part 44 which has the shoulder part 50, the quantity of the solder paste extruded to the back surface 16b side can be reduced. Thereby, the connector holding strength of the holding member 26 can be improved.

  6 shows an example in which the entire first leg portion 44 is tapered, but the portion from the tip of the first leg portion 44 to the portion covered with the solder 34 in the connecting portion 48 may be tapered. The same effect can be produced.

(Third embodiment)
In the present embodiment, the description of the parts common to the holding member 26, the connector 20, and the electronic control device 10 shown in the above embodiment is omitted.

  In the present embodiment, as shown in FIG. 7, the first leg portion 44 has a tapered portion as in the second embodiment. Specifically, in the insertion portion 46, a portion from the first end portion 46a to the predetermined position 52 between the second end portion 46b and the first end portion 46a has a tapered shape. Further, a portion from the predetermined position 52 to the second end portion 46 b has a constant width that is the same as the width at the predetermined position 52. In the following, the predetermined position 52 is shown as a connecting portion 52 between the tapered portion and the constant width portion in the insertion portion 46. Moreover, the 1st leg part 44 is flat form similarly to 1st Embodiment. In FIG. 7, for convenience, the corresponding cross-sectional area is shown in parentheses after the width notation.

  In the insertion portion 46, the width of the portion on the tip side of the connecting portion 52 is constant. On the other hand, the part from the connection part 52 to the predetermined position which is not coat | covered with the solder 34 in the connection part 48 becomes a taper shape like 2nd Embodiment. That is, the part from the 1st end part 46a to the predetermined position among the connection parts 48 is the taper-shaped 1st connection part 48a. The remaining portion of the connecting portion 48, that is, the second connecting portion 48b that is the portion on the base 40 side, is a portion having a constant width that is wider than the maximum width of the first connecting portion 48a. In FIG. 7, the center in the width direction coincides with the constant width portion, the tapered portion, and the second connecting portion 48 b in the insertion portion 46.

  In such a first leg portion 44, the width W2 of the connecting portion 48 becomes the minimum width W2s at the connecting end of the first connecting portion 48a with the insertion portion 46, and becomes wider toward the base portion 40 in the first connecting portion 48a. ing. The second connecting portion 48b has the maximum width W2b. For this reason, the minimum cross-sectional area S2s is obtained at the portion having the minimum width W2s, and the maximum cross-sectional area S2b is obtained at the portion having the maximum width W2b.

  On the other hand, in the insertion portion 46, the width from the first end portion 46 a to the connection portion 52 is wider as it is closer to the base portion 40, and the width is constant on the distal end side of the connection portion 52. That is, in the insertion part 46, it is W1u> = W1d. In addition, the width W1s of the second end 46b is the minimum width of the portion disposed in the through hole 30, and the width W1b of the first end 46a is wider than the width W1s of the second end 46b. It has become.

  Therefore, in the present embodiment, the width of the first leg portion 44 is W1u ≧ W1d, W1b> W1s, W2s = W1b, and thereby the cross-sectional area of the first leg portion 44 is S1u> S1d. , S1b> S1s, S2s = S1b. In addition, W2b> W1b is established, whereby S2b> S1b.

  When such a holding member 26 is employed, in addition to the effects described in the first embodiment, the same effects as those in the second embodiment can be achieved. That is, when the insertion portion 46 is inserted into the through hole 30, the solder paste escapes around the insertion portion 46 due to the tapered shape. Therefore, compared with the 1st leg part 44 which has the shoulder part 50, the quantity of the solder paste extruded to the back surface 16b side can be reduced. Thereby, the connector holding strength of the holding member 26 can be improved.

  In addition, as shown in the second embodiment, when the width W1b (cross-sectional area S1b) at the first end portion 46a is the same as the configuration in which the tip end of the first leg portion 44 is tapered, The volume of the portion of the insertion portion 46 disposed in the through hole 30 can be reduced. Therefore, it is possible to reduce the amount of solder paste extruded to the back surface 16b side. Thereby, the connector holding strength of the holding member 26 can be further improved.

(Fourth embodiment)
In the present embodiment, the description of the parts common to the holding member 26, the connector 20, and the electronic control device 10 shown in the above embodiment is omitted.

  As shown in FIGS. 8 to 11, the feature of the present embodiment is that the first leg portion 44 includes a step portion 54 provided along the extending direction while having a step in the plate thickness direction. The step portion 54 is located at a position where the end portion on the base portion 40 side is not covered with the solder 34 and the end portion on the tip end side is covered with the solder 34. The other configuration is the same as that of the third embodiment. In FIG. 10, for the sake of convenience, the corresponding cross-sectional area is shown in parentheses after the width notation.

  In the example shown in FIGS. 8 to 11, the width of the first leg portion 44 is W1u ≧ W1d, W1b> W1s, W2s = W1b, and thereby the cross-sectional area of the first leg portion 44 is S1u. > S1d, S1b> S1s, S2s = S1b. In addition, W2b> W1b is established, whereby S2b> S1b. In addition, a step portion 54 is further provided. The stepped portion 54 is a protrusion that protrudes on one side and is recessed on the opposite side in the thickness direction. In particular, in the present embodiment, the step portion 54 has a rounded arc-shaped cross section. In addition, as shown in FIG. 9, a convex line is a concave line if it sees from the opposite.

  Further, the stepped portion 54 is disposed in the through hole 30 across the base 40 and the connecting portion 48 from the end opposite to the connecting end with the first leg 44 in the base 40 in the extending direction. That is, it extends to the position between the first end 46a and the second end 46b. More specifically, it extends to the vicinity of the connecting portion 52.

  According to this, in addition to the effect described in the third embodiment, since the step portion 54 is provided in the thickness direction, the cross-sectional area can be increased if the width is the same. Thereby, compared with the insertion part 46 without a level | step difference shown with a broken line as a comparative example in FIG. 11, a contact area with the solder 34 increases and connector holding strength can be improved. In FIG. 11, an insertion portion 46 having the same thickness, the same width, and no step is shown as a comparative example.

  On the other hand, if the cross-sectional areas are the same, the width can be reduced by the provision of the stepped portion 54, and therefore the diameter of the through hole 30 can be reduced. Thereby, the difference of the hole diameter with the through-hole in which the terminal 22 etc. of the connector 20 are inserted can be made smaller.

  In the present embodiment, a protruding line is employed as the stepped portion 54. Such a stepped portion 54 can be easily formed by pressing a metal plate.

  In addition, as an example of a protruding item | line, it is not limited to the round-shaped arc-shaped cross section. It may be an angular shape. Further, the number of the step portions 54 is not limited to one. A plurality of rows may be provided in the width direction. Moreover, in the extending direction, you may form intermittently, without forming continuously. Moreover, as a formation range of the level | step-difference part 54, what is necessary is just the range which satisfy | fills S1u> = S1d, S1b> S1s, and S2s> = S1b. As described above, when stress acts on the holding member 26, the stress concentrates on the portion between the solder connection portion and the base portion 40, particularly the narrowest portion, in the connecting portion 48. Therefore, the stepped portion 54 is preferably formed continuously from a portion disposed in the through hole 30 to a position at a certain distance from the solder connection portion in the connecting portion 48.

(Fifth embodiment)
In the present embodiment, the description of the parts common to the holding member 26, the connector 20, and the electronic control device 10 shown in the above embodiment is omitted.

  The feature of this embodiment is that the stepped portion 54 has a crank shape as shown in FIGS. The other configuration is the same as that of the fourth embodiment. In FIG. 13, as a comparative example, an insertion portion 46 that is formed of a metal plate having the same thickness and has the same width and no step is indicated by a broken line. In FIG. 12, for the sake of convenience, the corresponding cross-sectional area is shown in parentheses after the width notation.

  Also in the present embodiment, the width of the first leg portion 44 is W1u ≧ W1d, W1b> W1s, W2s = W1b, whereby the cross-sectional area of the first leg portion 44 is S1u> S1d, S1b> S1s. , S2s = S1b. In addition, W2b> W1b is established, whereby S2b> S1b. In addition, a step portion 54 is further provided.

  As shown in FIGS. 12 and 13, the step portion 54 extends from a predetermined position between the first end portion 46 a and the second end portion 46 b to a predetermined position away from the solder connection portion at the connecting portion 48. Has been. In addition, a part of the first leg portion 44 in the width direction is translated in the plate thickness direction with respect to the remaining portion to form a crank-shaped step portion 54. Such a stepped portion 54 can be formed by punching a metal plate so as to have the shoulder portion 50 described in the first embodiment, for example, by pressing a portion of the shoulder portion 50.

  Even if such a stepped portion 54 is employed, the same effect as the stepped portion 54 described in the fourth embodiment can be obtained.

  In FIG. 13, for the sake of convenience, the connecting portion shifted in the plate thickness direction in the crank shape is shown as a right angle, but it goes without saying that the connecting portion may be rounded, rounded or chamfered.

(Sixth embodiment)
In the present embodiment, the description of the parts common to the holding member 26, the connector 20, and the electronic control device 10 shown in the above embodiment is omitted.

  The feature of this embodiment is that the stepped portion 54 is formed by bending as shown in FIGS. In FIG. 14, for the sake of convenience, the corresponding cross-sectional area is shown in parentheses after the width notation.

  Also in the present embodiment, the width of the first leg portion 44 is W1u ≧ W1d, W1b> W1s, W2s = W1b, and thus the cross-sectional area of the first leg portion 44 is S1u> S1d, S1b>. S1s, S2s = S1b. In addition, W2b> W1b is established, whereby S2b> S1b. In addition, a step portion 54 is further provided.

  In the holding member 26 shown in FIGS. 14 and 15, the stepped portion 54 is formed from a predetermined position between the first end portion 46 a and the second end portion 46 b to a predetermined position away from the solder connection portion in the connecting portion 48. Has been. Further, the step portion 54 is formed by bending both end portions in the width direction with respect to the center portion. Such a stepped portion 54 can be formed by valley folding at a portion indicated by a broken line in FIG.

  Even if such a stepped portion 54 is employed, the same effect as the stepped portion 54 described in the fourth embodiment can be obtained.

  In the present embodiment, an example in which the step portions 54 are provided at both ends in the width direction has been described, but a configuration in which the step portions 54 are provided only at one end may be employed.

(Seventh embodiment)
In the present embodiment, the description of the parts common to the holding member 26, the connector 20, and the electronic control device 10 shown in the above embodiment is omitted.

  As shown in FIGS. 17 to 19, the feature of the present embodiment is that the width of the first leg portion 44 is constant over the entire length, and the first leg is set so that S1b> S1s and S2s> S1s are satisfied. A step portion 54 is formed in a part of the extending direction of the portion 44. In FIG. 17, for the sake of convenience, the corresponding cross-sectional area is shown in parentheses after the width notation.

  In FIG. 17, a protrusion is formed as a stepped portion 54 from a predetermined position between the first end portion 46 a and the second end portion 46 b to a predetermined position away from the solder connection portion in the connecting portion 48. The width of the portion where the step portion 54 is formed is substantially the same as the width of the portion where the step portion 54 is not formed in the first leg portion 44. Therefore, even in the cross section of the same insertion portion 46, the portion with the stepped portion 54 shown in FIG. 18 protrudes on one side and the opposite side is recessed in the plate thickness direction, and the portion without the step shown in FIG. It has become.

  That is, in the present embodiment, the width of the first leg portion 44 is W1u = W1d, W1b = W1s, and W2s = W1b. Further, the cross-sectional area of the portion where the step portion 54 is provided is a constant cross-sectional area over the entire length in the extending direction, and is larger than the cross-sectional area of the portion where the step portion 54 is not provided. 18 and 19 show cross sections when the first position is a portion where the step portion 54 is provided and the second position is a portion where the step portion 54 is not provided. Therefore, in FIGS. 18 and 19, S1u> S1d. Further, S1b> S1s and S2s = S1b.

  The first leg portion 44 can be formed so as to satisfy S1b> S1s and S2s> S1s also by providing the step portion 54 partially in this manner. Moreover, the 1st leg part 44 can be formed so that S1u> = S1d, S1b> S1s, and S2s> = S1b may be satisfy | filled.

(Eighth embodiment)
In the present embodiment, the description of the parts common to the holding member 26, the connector 20, and the electronic control device 10 shown in the above embodiment is omitted.

  The first feature of the present embodiment is that the holding member 26 includes a second leg portion 56 as the leg portion 42 together with the first leg portion 44. Further, the second feature is that the leg portion 42 has one first leg portion and two second leg portions 56, and the first feature is between the pair of second leg portions 56 in the width direction. The leg 44 is arranged. Further, the pair of second leg portions 56 are line symmetric with respect to the extending direction.

  In the holding member 26 shown in the fourth embodiment, the holding member 26 shown in FIG. 20 replaces the rectangular portion 40a in the base portion 40 with a flat L-shaped L-shaped portion 40c, and further replaces the pair of second leg portions 56 with each other. It has an added structure. The second leg portion 56 is formed integrally with the base portion 40 and the first leg portion 44 by punching and bending the same metal plate as the base portion 40 and the first leg portion 44.

  Further, as described above, one leg portion 42 is inserted into one through hole 30. Therefore, the second leg portion 56 is inserted into the through hole 30 different from the first leg portion 44, and the pair of second leg portions 56 are also inserted into the different through holes 30.

  The second leg portion 56 includes a locking portion 58 that is locked to the printed circuit board 16. That is, the second leg portion 56 functions to prevent the holding member 26 and thus the connector 20 from falling off the printed circuit board 16 before reflow soldering.

  In FIG. 20, a part of the second leg portion 56 protrudes to the back surface 16 b side of the printed circuit board 16 in a state where the second leg portion 56 is inserted into the corresponding through hole 30. And the latching | locking part 58 is provided so that it may latch on the opening edge part of the through-hole 30 in the back surface 16b. Such a second leg portion 56 is described in detail as a first leg portion in Japanese Patent No. 4626680 filed by the applicant of the present invention. Therefore, the description thereof will be simplified below.

  Each second leg portion 56 includes a first connecting portion 60, a spring portion 62, and a second connecting portion 64 in addition to the above-described locking portion 58. In addition, the width | variety orthogonal to the longitudinal direction of the 2nd leg part 56 is longer than plate | board thickness in the full length.

  The first connecting portion 60 is a portion that connects the locking portion 58 and the spring portion 62. As shown in FIG.20 and FIG.21, the 1st connection part 60 is formed in planar planar L shape. And the latching | locking part 58 is connected with the edge part by the side of a long side among the L-shaped 1st connection parts 60, and the spring part 62 is connected by the edge part by the side of a short side. At least a part of the long side of the first connecting portion 60 is disposed in the through hole 30. This 1st connection part 60 is the same position in the plate | board thickness direction with the part except the base 40 and the level | step-difference part 54 in the 1st leg part 44 with the latching | locking part 58. FIG.

  The spring part 62 is a part that is deformed so that a part of the locking part 58 and the first connecting part 60 is inserted through the through hole 30 and locked to the back surface 16b. The spring portion 62 is formed in, for example, a substantially U shape or C shape on a plane. And the part of the dashed-dotted line shown in FIG. 21 is valley-folded with respect to the base part 40, and it forms so that a pair of spring part 62 may mutually face. In addition, the level | step-difference part 54 is formed by pressing the broken-line part shown in FIG.

  In the present embodiment, the spring portion 62 is bent with respect to the base portion 40 at an angle of approximately 90 degrees. For this reason, the plate | board thickness direction of the spring part 62 corresponds with the width direction. And the 1st connection part 60 is connected with one end of the spring part 62, and the 2nd connection part 64 is connected with the other end.

  The second connecting portion 64 connects the spring portion 62 and the base portion 40. A first leg portion 44 and a pair of second leg portions 56 are connected to one end of the L-shaped portion 40 c in the base portion 40.

  The mounting structure of the holding member 26 configured as described above is shown in FIGS. 22 and 23, the dummy land is omitted for convenience. The second leg 56 may be reflow soldered similarly to the first leg 44 or may not be reflow soldered. In this embodiment, an example of reflow soldering is shown.

  The three leg portions 42 are inserted into mutually different through holes 30. As shown in FIG. 24, these through-holes 30 are formed at the same position in the plate thickness direction and arranged side by side with a predetermined interval in the width direction.

  The first leg portion 44 is inserted into the through hole 30 in the middle. As in the fourth embodiment, the first leg portion 44 has a protruding stepped portion 54, and a connecting portion between the first end portion 46a and the second end portion 46b. 52 is located. Therefore, in the state connected to the solder 34, the connector holding strength can be improved as described in the fourth embodiment. Moreover, breakage can also be suppressed.

  On the other hand, the 2nd leg part 56 is each inserted in the through-hole 30 of both sides. Each locking portion 58 is locked to the opening edge portion of the through hole 30 on the back surface 16 b, and a part of the first connecting portion 60 is disposed in the through hole 30. In this state, it is connected to the solder 34. As described above, when the second leg portion 56 is also connected to the solder 34, the connector holding strength can be improved also by the second leg portion 56.

  Moreover, in this embodiment, since it has the 2nd leg part 56 with the 1st leg part 44, it can suppress that an inclination arises in the connector 20 by the multiple leg part 42 in the state before reflow. In particular, since the pair of second legs 56 are provided, the inclination of the connector 20 can be effectively suppressed.

  Moreover, the 2nd leg part 56 has the latching | locking part 58 latched to the back surface 16b. Therefore, even if an external force is applied in a direction in which the leg portion 42 is pulled out from the through hole 30 in the extending direction in the state before reflow, the locking portion 58 can prevent the pulling out. Moreover, since a pair of latching | locking part 58 is extended from the 1st connection part 60 in the mutually opposite direction in the width direction, the rattling of the connector 20 can be suppressed.

  Moreover, in the 2nd leg part 56, the latching | locking part 58 and the spring part 62 are comprised in the mutually different position, and the spring part 62 is located on the one surface 16a. That is, the spring portion 62 is not directly locked to the wall surface of the through hole 30 by a reaction force due to its own deformation, but is inserted into the through hole 30 and locked to the back surface 16b. It is. Therefore, when inserting the locking portion 58 into the through hole 30, the spring property that the locking portion 58 strongly hits the wall surface of the through hole 30 is not required. Thereby, the insertion force of the latching | locking part 58 with respect to the through-hole 30 can be reduced. And damage to the dummy land 32 can be suppressed.

  Further, in the present embodiment, the protruding height of the first leg portion 44 on the back surface 16b is higher than the protruding height of the second leg portion 56 on the back surface 16b. For this reason, the first leg portion 44 is inserted into the through hole 30 before the second leg portion 56 is inserted into the corresponding through hole 30. Therefore, since the first leg portion 44 exerts a positioning effect with respect to the second leg portion 56, the second leg portion 56 having the spring portion 62 can be inserted into the corresponding through hole 30 with high positional accuracy.

  Even when the second leg portion 56 is not reflow-soldered, the first leg portion 44 is soldered, so that it is possible to prevent the locking portion 58 from being released from being locked.

  Further, in the present embodiment, an example in which the holding member 26 includes the pair of second leg portions 56 has been described, but the first leg portion 44 and only one second leg portion 56 may be included.

  Moreover, in this embodiment, the example in which the 2nd leg part 56 was added based on the holding member 26 shown in 4th Embodiment was shown. However, the second leg portion is based on the holding member 26 shown in the embodiments other than the fourth embodiment, specifically, in the first embodiment to the third embodiment and the fifth embodiment to the seventh embodiment. The holding member 26 to which 56 is added can also be adopted.

(Ninth embodiment)
In the present embodiment, the description of the parts common to the holding member 26, the connector 20, and the electronic control device 10 shown in the above embodiment is omitted.

  The feature of this embodiment is that the locking portion 58 of the second leg portion 56 is locked to the wall surface of the through hole 30 by the reaction force of the spring. The other points are almost the same as in the eighth embodiment. A different point is that the first leg portion 44 has a bent portion 66. Thereby, the three leg parts 42 are inserted in mutually different through holes 30 at substantially the same position in the plate thickness direction.

  The first leg portion 44 has a bent portion 66 in the vicinity of the tapered end portion of the connecting portion 48, and the bent portion 66 is bent in a crank shape. In FIG. 25, due to this bending, a portion on the front end side with respect to the bent portion 66 is lifted to the front side of the paper with respect to a portion on the base portion 40 side with respect to the bent portion 66 and is made parallel to the base portion 40. . The insertion portion 46 is connected to the solder 34 in a state where a part of the insertion portion 46 is inserted into the through hole 30.

  The second leg portion 56 is bent at an angle of about 90 degrees with respect to the base portion 40 over its entire length. And it has the vertical part 68, the parallel part 70, and the insertion part 72 from the base 40 side. Further, the pair of second legs 56 are line symmetric with respect to the extending direction.

  The vertical portion 68 has its own plate thickness direction substantially coincided with the width direction, and the parallel portion 70 is bent at an angle of about 90 degrees with respect to the vertical portion 68. The parallel portion 70 has its own plate thickness direction substantially coincident with the extending direction. The insertion portion 72 is bent with respect to the parallel portion 70.

  In the pair of second leg portions 56, the insertion portions 72 extend in substantially the same direction, but are not parallel to each other, and are gently curved. Specifically, the opposing distance in the width direction of the pair of insertion portions 72 is maximum at an approximately intermediate position in the extending direction, and becomes longer from the parallel portion 70 toward the intermediate position. Further, on the tip side with respect to the intermediate position, the closer to the tip, the shorter the facing distance. That is, the insertion portion 72 of the second leg portion 56 has a widest width at the intermediate position and a narrow shape at the tip position when both are viewed as a unit. A middle portion is a locking portion 58.

  A part of the insertion portion 72 is connected to the solder 34 in a state where the locking portion 58 is in contact with the wall surface of the through hole 30 by the spring reaction force of the second leg portion 56.

  Even if the holding member 26 having such a configuration is employed, the same effect as that of the holding member 26 described in the eighth embodiment can be obtained.

  Even when the second leg portion 56 is not reflow-soldered, the first leg portion 44 is soldered, so that it is possible to suppress the locked state of the locking portion 58 from being pulled.

  Further, in the present embodiment, an example in which the holding member 26 includes the pair of second leg portions 56 has been described, but the first leg portion 44 and only one second leg portion 56 may be included. In this case, rattling in the width direction is suppressed by the first leg portion 44 and the second leg portion 56 by the first leg portion 44 also contacting the wall surface of the through hole 30. However, considering the damage of the dummy lands 32, it is better to have a configuration including a pair of second leg portions 56 than to bring the first leg portions 44 into contact with the wall surface.

  Moreover, in this embodiment, the example which added the 2nd leg part 56 based on the holding member 26 shown in 4th Embodiment was shown. However, the second leg portion with respect to the holding member 26 shown in the embodiments other than the fourth embodiment, specifically, the first embodiment to the third embodiment and the fifth embodiment to the seventh embodiment. The holding member 26 to which 56 is added can also be adopted.

  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.

  Although the holding member 26 has shown the example which contains the 1st leg part 44 as the leg part 42, it is good also as a structure containing two or more of the 1st leg parts 44. FIG.

  The number of holding members 26 fixed to the same connector 20 is not limited to the above example. One or three or more may be used. Preferably, a plurality of holding members 26 are fixed in the arrangement direction of the terminals 22.

  In the above-described embodiment, an example in which the cross-sectional areas of the first leg portions 44 are S1b> S1s and S2s = S1b is shown. However, the first leg 44 may be formed so as to satisfy at least S1b> S1s and S2s> S1s.

  For example, the holding member 26 shown in the first embodiment may have a configuration in which the width is reduced at the same position as the one surface 16a so that S1b> S2s> S1s. Also by this, as described in the first embodiment, the connector holding strength of the holding member 26 can be improved. Further, since S2s> S1s, it is possible to suppress breakage even if stress concentrates on a portion of the joint portion 48 that is not covered with the solder 34.

  Further, the first leg portion 44 may be formed so that S2s> S1b. For example, with respect to the holding member 26 shown in the first embodiment, another shoulder portion 50 is provided at the same position as the one surface 16a, whereby the first leg portion 44 is formed so as to satisfy W2s> W1b. Also good. That is, the width of the first leg portion 44 may be changed in three stages. According to this, compared with S2s = S1b, it can suppress more effectively that a breakage arises.

  Moreover, it is good also as a structure which does not satisfy | fill S1u> = S1d. For example, in the insertion portion 46 of the holding member 26 shown in the first embodiment, the portion near the back surface 16b in the protruding portion 46c is slightly convex, and the cross-sectional area of the convex portion is from the cross-sectional area S1s of the second end portion 46b. May be slightly larger. Moreover, you may have a part with a smaller cross-sectional area than the 2nd end part 46b between the 1st end part 46a and the 2nd end part 46b.

DESCRIPTION OF SYMBOLS 10 ... Electronic controller, 12 ... Case, 12a ... Case, 12b ... Cover, 14 ... Circuit board, 16 ... Printed circuit board, 16a ... One side, 16b ...・ Back side, 18 ... electronic component, 20 ... connector, 22 ... terminal, 24 ... housing, 24a ... end, 24b ... front side, 24c ... groove, 26 ... -Holding member, 30 ... through hole, 32 ... dummy land, 34 ... solder, 40 ... base, 40a ... rectangular part, 40b ... bifurcated part, 40c ... L-shaped Part, 42 ... leg part, 44 ... first leg part, 46 ... insertion part, 46a ... first end part, 46b ... second end part, 46c ... projecting part, 48 ... connecting part, 48a ... first connecting part, 48b ... second connecting part, 50 ... shoulder part, 52 ... connecting part, 4 ... Step part 56 ... Second leg part 58 ... Locking part 60 ... First connecting part 62 ... Spring part 64 ... Second connecting part 66 ... Bending part, 68 ... Vertical part, 70 ... Parallel part, 72 ... Inserting part,

Claims (15)

A holding member inserted into the through hole (30) of the printed circuit board (16) and reflow soldered to hold the connector (20) on the printed circuit board;
Of one side (16a) of the printed circuit board and the back side (16b) opposite to the one side, a base (40) disposed on the one side and fixed to the connector;
And at least one leg (42) formed integrally with the base by processing the same metal plate and extending from the base toward the through hole,
One leg is inserted into one through hole,
As the leg portion, it has at least one first leg portion (44) which is reflow soldered and whose tip protrudes toward the back surface (16b) side,
The first leg portion includes an insertion portion (46) to be inserted into the through hole, and a connecting portion (48) for connecting the insertion portion and the base portion, and the leg portion is extended. In the direction, the portion on the tip side from the first end (46a) that is the same position as the one surface is the insertion portion,
In the insertion portion, the cross-sectional area of the first end portion is S1b, the cross-sectional area of the second end portion (46b) that is the same position as the back surface is S1s, and the minimum value of the cross-sectional area is S2s in the joint portion. Then,
S1b> S1s and S2s> S1s,
The holding member, wherein the first leg portion is formed to satisfy the above.   The first leg portion (44) is formed so that the cross-sectional area S1b of the first end portion (46a) and the minimum cross-sectional area value S2s of the connecting portion (48) satisfy S2s ≧ S1b. The holding member according to claim 1, wherein: In the insertion portion (46), the cross-sectional area at an arbitrary first position in the extending direction is S1u, and the cross-sectional area at an arbitrary second position farther from the base (40) than the first position is S1d. Then
S1u ≧ S1d,
The holding member according to claim 2, wherein the first leg portion (44) is formed so as to satisfy the above condition. The width in the width direction perpendicular to both the plate thickness direction and the extending direction of the base (40) is defined as the width.
In the insertion portion (46), the width of the first position is W1u, the width of the second position is W1d, the width of the first end (46a) is W1b, and the width of the second end (46b) is If W1s and the minimum value of the width at the connecting portion (48) is W2s,
W1u ≧ W1d, W1b> W1s, and W2s ≧ W1b,
The holding member according to any one of claims 1 to 3, wherein the first leg portion is formed so as to satisfy the above condition.   Assuming that the maximum value of the width in the joint portion (48) is W2b, the first leg ( 44. The holding member according to claim 4, wherein 44) is formed. The first leg portion (44) includes a step portion (54) provided along the extending direction while having a step in the plate thickness direction,
The stepped portion is a position where the end on the base (40) side is not covered with the solder (34), and the end on the tip side of the first leg is covered with the solder. The holding member according to claim 4 or 5, wherein the holding member is provided.   The holding member according to claim 6, wherein the stepped portion (54) is a protrusion that protrudes on one side and is recessed on the opposite side in the plate thickness direction.   The holding member according to claim 6, wherein the stepped portion has a crank shape. At least a part of the first leg (44) has a tapered shape in which the width becomes narrower as the distance from the base (40) increases in the extending direction.
The holding member according to any one of claims 4 to 8, wherein at least a part of the tapered portion is disposed in the through hole (30).   In the insertion portion (46), a portion from the first end portion (46a) to a predetermined position between the second end portion (46b) and the first end portion is the tapered shape, The holding member according to claim 9, wherein a portion from a predetermined position to the second end portion has a constant width that is the same as a width at the predetermined position.   As the leg part (42), a second part provided with an engaging part (58) inserted into a through hole (30) different from the first leg part (44) and engaging with the printed circuit board (16). The holding member according to any one of claims 1 to 10, wherein the holding member has at least one leg (56). The second leg (56) protrudes to the back surface (16b) side of the printed circuit board (16),
The holding member according to claim 11, wherein the locking portion (58) is locked to an opening edge portion of the through hole (30) on the back surface.   The holding member according to claim 11, wherein the locking portion (58) is locked to the wall surface of the through hole (30) by a reaction force of a spring. The leg (42) has one first leg (44) and two second leg (56),
The holding member according to claim 11, wherein the first leg is disposed between the pair of second legs in the width direction. A connector held on a printed circuit board (16) having a through hole (30),
A connector comprising the holding member (26) according to any one of claims 1 to 14.

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