Source: https://patents.google.com/patent/JP4709502B2/en
Timestamp: 2020-02-20 09:02:37
Document Index: 462308241

Matched Legal Cases: ['arts 18', 'arts 18', 'arts 18', 'art 96', 'art 14', 'art 18', 'art 18', 'art 20']

JP4709502B2 - Board mounted electrical connector - Google Patents
JP4709502B2
JP4709502B2 JP2004144454A JP2004144454A JP4709502B2 JP 4709502 B2 JP4709502 B2 JP 4709502B2 JP 2004144454 A JP2004144454 A JP 2004144454A JP 2004144454 A JP2004144454 A JP 2004144454A JP 4709502 B2 JP4709502 B2 JP 4709502B2
JP2004144454A
JP2005327589A (en
英久 山上
2004-05-14 Application filed by タイコエレクトロニクスジャパン合同会社 filed Critical タイコエレクトロニクスジャパン合同会社
2004-05-14 Priority to JP2004144454A priority Critical patent/JP4709502B2/en
2005-11-24 Publication of JP2005327589A publication Critical patent/JP2005327589A/en
2011-06-22 Publication of JP4709502B2 publication Critical patent/JP4709502B2/en
The present invention relates to a board-mounted electrical connector attached to a board, and in particular, a leg portion of a contact used in the electrical connector extends outward from a rear wall of the housing of the electrical connector so as to be substantially orthogonal to the board. The present invention relates to a board-mounted electrical connector of a type that is bent into a board and connected to a through hole of a board.
As a conventional board-mounted electrical connector, an electrical connector including contacts arranged in three rows and an insulating housing that holds these contacts is known (Patent Document 1). Each contact of the electrical connector has a contact portion having an axis substantially parallel to the substrate on which the housing is mounted, and extends outward from the rear wall of the housing and extends in a direction perpendicular to the axis of the contact portion to penetrate the substrate. And a leg connected to the hole. The leg portion has an extending portion that extends upward in a direction away from the rear wall of the housing, a bent portion that continues to the extending portion, and a straight portion that extends from the bent portion so as to be substantially orthogonal to the substrate. is doing.
JP-A-9-69371 (FIG. 2)
In general, the thermal expansion coefficient of a board-mounted electrical connector differs between an insulating housing constituting the electrical connector and a board to which the insulating housing is attached. Due to the difference in the coefficient of thermal expansion, the degree of expansion and contraction of the parts due to temperature changes is different, so stress may be generated at the contact portion (brazing portion) between the contact and the substrate, and a crack may occur in the brazing portion. . For this reason, in the above-described conventional electrical connector, the extension portion is extended in the direction away from the substrate, and the total length of the leg portion is lengthened to absorb the dimensional difference due to the expansion and contraction of the component. I'm trying to reduce the stress on the connecting part. As a result, even if the distance between the contact and the substrate is small, the size of the leg can be increased, so that high-density and low-profile mounting of the connector can be realized.
Usually, the contact legs are plated with lead-containing solder. This is because the legs are soldered to the substrate with solder containing lead, and therefore the connectivity is good when the legs are plated with solder containing lead. As a result, this lead may contaminate the environment at the disposal stage such as the electrical connector manufacturing stage and after the product lifetime. When the entire leg is plated with a metal that does not contain lead (lead-free solder), for example, tin, there is little risk of environmental contamination, but whiskers (needle shape over time) A phenomenon in which crystals spontaneously occur and grow on the plating surface may occur. This whisker is mainly caused by internal stress generated in the contact, and is easily generated in the bent portion. When a whisker is generated, adjacent contacts are short-circuited by these whiskers, thereby causing a problem that desired electrical characteristics cannot be obtained.
The present invention has been made in view of the above circumstances, and is a board-mounting type capable of preventing environmental contamination due to lead and preventing whisker generation while realizing a low height and high density of an electrical connector. It is an object to provide an electrical connector.
The board-mounted electrical connector of the present invention includes a contact and an insulating housing that holds a plurality of rows of contacts, and each contact protrudes outward from the rear wall of the insulating housing and a contact portion that contacts the mating connector. A leg portion connected to the base plate, the leg portion extending from the rear wall, a bent portion continuing from the extended portion, and extending from the bent portion so as to be substantially orthogonal to the substrate. A line portion connected to the through-hole, and at least one of the plurality of rows of contacts extending from the contact closest to the substrate extends from the rear wall of the insulating housing in a direction away from the substrate, and is a bent portion. In the board-mounted electrical connector configured so as to reach the above, only the straight portion that does not reach the bent portion of the leg portion is partially tin-plated.
The board-mounted electrical connector of the present invention includes contacts and an insulating housing that holds the contacts in a plurality of rows, and each contact protrudes outward from the contact portion that contacts the mating connector and the rear wall of the insulating housing. A leg portion connected to the substrate, the leg portion extending from the rear wall, a bent portion continuing to the extended portion, and extending from the bent portion so as to be substantially orthogonal to the substrate. A board mounting having a linear portion connected to the through hole of the board, and extending portions of the plurality of contacts extending from the rear wall of the insulating housing substantially parallel to the board to reach the bent portion In the type electrical connector, the leg portion is characterized in that only a straight portion that does not reach the bent portion of the leg portion is partially tin-plated.
The term “tin plating” as used herein includes not only pure tin plating but also plating with a tin alloy that does not contain lead, such as tin-copper or tin-bismuth.
Further, the straight portion has a shape that is slightly bulged in order to give elasticity in a direction perpendicular to the axial direction, for example, in a case where the straight portion is completely straight, and the bulged portion of the substrate A shape configured to connect to the through hole is also included.
Furthermore, the partial tin plating means that a part or all of the straight part is tin-plated, and a bent part other than the straight part is not tin-plated.
The bent portion includes not only a curved shape having a relatively large radius, but also a curved shape having a relatively small radius generated by simply bending a straight leg.
According to the first aspect of the present invention, at least the extended portion of the contact in the row closest to the substrate extends in the direction away from the rear wall of the insulating housing to the bent portion and reaches the bent portion. In addition, since the straight portion of the leg portion is partially tin-plated, it is possible to realize low-profile mounting of the electrical connector, while preventing environmental contamination due to lead, and tin plating is not performed up to the bent portion. Generation of whiskers can be prevented.
According to the second aspect of the present invention, the extending portions of the contacts in the plurality of rows are configured to extend from the rear wall of the insulating housing substantially parallel to the substrate and reach the bent portion, and the legs Since the straight portion is partially tin-plated, the portion can prevent environmental contamination due to lead, and tin plating is not performed up to the bent portion, so that the occurrence of whiskers in the bent portion can be prevented.
Embodiments of a board-mounted electrical connector according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic view of a board-mounted electrical connector (hereinafter simply referred to as a connector) according to a first embodiment of the present invention. FIG. 1 (a) shows a case where the overall length of a leg portion is relatively short. 1 (b) shows a modification in which the overall length of the leg portion is relatively long. First, a description will be given with reference to FIG. The connector 1 includes an insulating housing 2 attached to the substrate 14 and a plurality of contacts 6 (6a, 6b) held by the insulating housing 2. The insulating housing 2 has a fitting recess 8 that receives a mating connector (not shown).
The contacts 6 include a plurality of contacts 6a arranged in the upper direction in the direction perpendicular to the paper surface and a plurality of contacts 6b arranged similarly in the lower stage. In this embodiment, the contacts 6 are arranged in two rows of the upper and lower rows, but may be arranged in three or more rows. The contact 6 penetrates the rear wall 4 of the insulating housing 2 and is held by press-fitting or the like, and the contact 6 extends linearly from the held portion 10 in the forward direction, that is, in the fitting direction (not shown). And a leg portion 16 that extends rearward from the rear wall 4 and is connected to the substrate 14. The insulating housing 2 may be fixed to the substrate 14 only by the leg portions 16 or may be fixed to the substrate 14 by adding fixing means such as screwing (not shown).
The leg portion 16a of the upper contact 6a includes an extended portion 18a that extends slightly obliquely upward outward from the rear wall 4, a bent portion 18b that continues to the extended portion 18a, and a substrate 14 that extends from the bent portion 18b. And a linear portion 18c that hangs so as to be substantially orthogonal to the horizontal axis. The straight line portion 18c is inserted into the corresponding through hole 20 of the substrate 14 and brazed with a lead-free solder such as tin-copper solder.
On the other hand, the lower contact 16b has an extending portion 22a that extends obliquely upward from the rear wall 4 at a slightly steep angle, a bent portion 22b that continues to the extending portion 22, and a straight portion 22c. The difference from the upper leg portion 16a is that the entire length of the lower leg portion 16b is short, and the extending portion 22a extends away from the substrate 14 at a relatively steep angle. The extension portions 18a and 22a once extend in the direction away from the substrate 14 because the length of the leg portions 16a and 16b extending from the rear wall 4 to the substrate 14 is reduced as described above. This is to make it as long as possible. As a result, the difference in the degree of contraction due to the difference in thermal expansion coefficient between the connector 1 and the board 14 is absorbed, and the force applied to the connecting portion between the board 14 and the straight portions 18c, 22c is reduced, so The attachment portion 29 is not cracked.
What is important here is that the leg 16 is partially tin-plated. The lower leg portion 16b is tin-plated in a region indicated by hatching in FIG. 1 from the straight portion 22c, that is, the portion from the tip 22d of the leg portion 16b to the portion immediately before the bent portion 22b. The upper leg portion 16a is tin-plated from the tip 18d of the leg portion 16a to the same height as the tin-plated portion of the straight portion 22c of the leg portion 16b. That is, tin plating is performed up to the position indicated by the arrow 24.
The upper leg portion 16a may be tin-plated up to the straight portion 18c that extends immediately before the bent portion 18b, that is, the portion indicated by the arrow 28. Thus, since tin plating is tin-plated only in the whole area | region of the linear parts 18c and 22c which do not reach the bending parts 18b and 22b, or the one part area | region, there is no possibility that a whisker will generate | occur | produce in the bending parts 18b and 22b. .
In addition, the tin used for plating here may be a tin alloy not containing lead in addition to pure tin. For example, when a lead-free solder made of a tin-copper alloy is plated and brazed with a copper-tin solder, the solderability is good and economical. Alternatively, it may be plated with a lead-free solder of a tin-bismuth alloy.
Next, the manufacturing process of the connector 1 until this tin plating is performed is demonstrated roughly. The contacts 6 are first stamped out from a metal plate such as a copper alloy, and then the entire individual contacts 6 are nickel-plated. Thereafter, partial tin plating is performed for a predetermined length from the tips 18d and 22d of the leg portion 16 of the contact 6, that is, the dimension indicated by the arrow 24 described above, or in the case of the leg portion 16a, by the arrow 28. Thereafter, the leg 6 is bent into a predetermined shape and the leg 16 is driven into the rear wall 4 of the insulating housing 2, or after being driven into the insulating housing 2, the leg 16 is bent into a predetermined shape. Thus, the connector 1 is configured.
Next, a connector 40 according to a modification of the connector 1 will be described with reference to FIG. In the description, the same parts as those in FIG. 1A will be described with the same reference numerals. Further, since the internal structure of the connector 40 is the same as that of the connector 1, the description thereof is omitted. The connector 40 is different from the connector 1 in that the total length of the leg portions 56 (56a, 56b) of the contacts 46 (46a, 46b) is long. For this reason, there is a comparative margin compared to the connector 1 with respect to the stress generated in the connection portion, that is, the brazing portion 29 between the connector 40 and the substrate 14 due to the contraction difference.
Therefore, the extending portion 58a of the upper contact 46a extends substantially parallel to the substrate 14, and the extending portion 62a of the lower contact 46b extends outward from the rear wall 44 of the insulating housing 42, that is, the substrate. The angle toward the direction away from 14 is gentler than the extending portion 22a of the lower contact 6b of the connector 1. Even in the case of the connector 40 of this modified example, as in the case of the connector 1, partial tin plating is performed on the straight portions 58 c and 62 c of the leg portion 56. Similar to the case of the connector 1, the areas where the tin plating is performed are the straight portions 58 c and 62 c that avoid the bent portions 58 b and 62 b, and thus detailed description thereof is omitted.
In the case of the connectors 1 and 40 shown in FIG. 1, even if the dimension from the held portion 10 to the bottom surface 30 of the connectors 1 and 40 is short, the extension portions 18a, 22a and 62a are formed away from the substrate 14. The length of the leg portion 16 can be increased. For this reason, if a board | substrate is arrange | positioned in the position shown to 14 ', it will become possible to mount a connector with low profile. Accordingly, the mounting area of the connectors 1 and 40 can be reduced and a plurality of connectors can be arranged on the board 14 with high density while enabling low-profile mounting.
Next, the connector of the second embodiment will be described with reference to FIG. FIG. 2 is a schematic view of the connector 80 of the second embodiment. The connector 80 of the second embodiment is different from the connectors 1 and 40 shown in FIG. 1 in that the extension part of the leg part 96 (96a, 96b) of the contact 86 (86a, 86b) held by the insulating housing 82. This is that 98a and 102a extend substantially parallel to the substrate 14. Such a shape of the leg portion 96 is suitable when the length of the leg portion 96 can be made relatively long, or when the difference in thermal expansion coefficient between the insulating housing 82 and the substrate 14 is not large. Also in this case, as shown by the hatched lines in FIG. 2, the linear portions 98c and 102c can be subjected to partial tin plating. This partial tin plating can also be performed in the range up to immediately before reaching the bent portions 98b and 102b. However, this aspect is the same as that of the connectors 1 and 40 shown in FIG.
In the case of the connector 80 shown in FIG. 2, since the extension portions 98a and 102a are parallel to the substrate 14, the mounting area of the connector 80 is difficult to reduce, and it is difficult to realize low-profile mounting of the connector. In addition to preventing, cracks in the brazed portion of the connecting portion with the substrate 14 can be prevented.
BRIEF DESCRIPTION OF THE DRAWINGS The schematic of the board | substrate mounting type electrical connector of the 1st Embodiment of this invention is shown, (a) shows the case where the full length of a leg part is comparatively short, (b) is a deformation | transformation where the full length of a leg part is comparatively long. An example is shown. Schematic of the board mounted connector of the second embodiment
1, 40, 80 Board-mounted electrical connector 2, 42, 82 Insulating housing 4, 44 Rear wall 6, 46, 86 Contact 12 Contact part 14, 14 'Board 16, 56, 96 Leg 18a, 22a, 58a, 62a 98a, 102a Extension part 18b, 22b, 58b, 62b, 98b, 102b Bending part 18c, 22c, 58c, 62c, 98c, 102c Straight line part 20 Through hole 29 Brazing part
A contact and an insulating housing for holding the contacts in a plurality of rows, each of the contacts being in contact with a mating connector, and a leg that protrudes outward from the rear wall of the insulating housing and is connected to the substrate The leg portion extends from the rear wall, a bent portion continuous to the extended portion, and extends from the bent portion so as to be substantially orthogonal to the substrate. A linear portion connected to the through hole, and the extending portion of the contact in the row closest to the substrate among the plurality of rows of contacts is in a direction away from the rear wall of the insulating housing to the substrate. In the board-mounted electrical connector configured to extend and reach the bent portion,
Each of the leg portions is a board-mounted electrical connector characterized in that only the straight portion that does not reach the bent portion of the leg portions is partially tin-plated.
A contact and an insulating housing for holding the contacts in a plurality of rows, each of the contacts being in contact with a mating connector, and a leg that protrudes outward from the rear wall of the insulating housing and is connected to the substrate The leg portion extends from the rear wall, a bent portion continuous to the extended portion, and extends from the bent portion so as to be substantially orthogonal to the substrate. A linear portion connected to the through hole, and the extending portions of the contacts in a plurality of rows extend from the rear wall of the insulating housing substantially parallel to the substrate and reach the bent portion. Board-mounted electrical connectors
JP2004144454A 2004-05-14 2004-05-14 Board mounted electrical connector Active JP4709502B2 (en)
JP2004144454A JP4709502B2 (en) 2004-05-14 2004-05-14 Board mounted electrical connector
TW094115065A TW200607163A (en) 2004-05-14 2005-05-10 Board mounting electrical connector
KR1020050039559A KR101098095B1 (en) 2004-05-14 2005-05-12 Board Mounting Electrical Connector
ES200501145A ES2274691A1 (en) 2004-05-14 2005-05-12 Plate mounted electrical connector.
CN 200510072939 CN1697259B (en) 2004-05-14 2005-05-16 Board mounted electrical connector
US11/129,779 US7309243B2 (en) 2004-05-14 2005-05-16 Board mounted electrical connector
US11/935,784 US7497702B2 (en) 2004-05-14 2007-11-06 Board mounted electrical connector
ES200901080A ES2383746B8 (en) 2004-05-14 2009-04-24 Plate mounted electrical connector
JP2005327589A JP2005327589A (en) 2005-11-24
JP4709502B2 true JP4709502B2 (en) 2011-06-22
ID=35309998
JP2004144454A Active JP4709502B2 (en) 2004-05-14 2004-05-14 Board mounted electrical connector
US (2) US7309243B2 (en)
JP (1) JP4709502B2 (en)
KR (1) KR101098095B1 (en)
CN (1) CN1697259B (en)
ES (2) ES2274691A1 (en)
TW (1) TW200607163A (en)
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2004-05-14 JP JP2004144454A patent/JP4709502B2/en active Active
2005-05-10 TW TW094115065A patent/TW200607163A/en unknown
2005-05-12 ES ES200501145A patent/ES2274691A1/en active Pending
2005-05-12 KR KR1020050039559A patent/KR101098095B1/en active IP Right Grant
2005-05-16 CN CN 200510072939 patent/CN1697259B/en active IP Right Grant
2005-05-16 US US11/129,779 patent/US7309243B2/en active Active
2007-11-06 US US11/935,784 patent/US7497702B2/en active Active
2009-04-24 ES ES200901080A patent/ES2383746B8/en active Active
US7309243B2 (en) 2007-12-18
CN1697259B (en) 2012-01-11
ES2383746B8 (en) 2015-12-02
JP2005327589A (en) 2005-11-24
KR101098095B1 (en) 2011-12-26
US20050255725A1 (en) 2005-11-17
CN1697259A (en) 2005-11-16
ES2383746B1 (en) 2013-05-07
TW200607163A (en) 2006-02-16
US20080132096A1 (en) 2008-06-05
ES2383746A1 (en) 2012-06-26
KR20060047783A (en) 2006-05-18
ES2274691A1 (en) 2007-05-16
US7497702B2 (en) 2009-03-03
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2010-01-21 A911 Transfer of reconsideration by examiner before appeal (zenchi)