JP2016129148A - Electric connector for circuit board and electric connector mounting body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric connector for circuit board which allows for reliable connection of the connection portion of each terminal and the ground leg of a shield member, respectively, with corresponding pads without up-sizing in the terminal arrangement direction, and to provide an electric connector mounting body.SOLUTION: A signal connection portion 24S of a signal terminal 20S and the signal connection portion 24G of a ground terminal 20G are located on the inside of the outer surface of the side plate 34 of a shield member 30 in the connector width direction. The ground connection portion 24G of the ground terminal 20G is located between the signal connection portions 24S of two signal terminals 20S adjoining in the terminal arrangement direction. The ground leg 38 of the shield member 30 is connected with the ground pad of a circuit board at a position on the outside of the outermost end of the connection portions 24S, 24G, and located in a region between the signal connection portions 24S on the opposite sides of the ground connection portion 24G corresponding to the ground leg 38, while having a range overlapping the ground connection portion 24G in the terminal arrangement direction.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an electrical connector for a circuit board disposed on a circuit board and an electrical connector mounting body in which the circuit board electrical connector is mounted on the circuit board.

  As this type of connector, for example, an electrical connector for a circuit board disclosed in Patent Document 1 is known. Patent Document 1 discloses a circuit board electrical connector that is arranged on a circuit board and into which a mating connector is fitted and connected from above. The electrical connector for a circuit board includes a thin, substantially rectangular parallelepiped housing extending in one direction parallel to the circuit board as a longitudinal direction, and a plurality of terminals arranged and held in the housing with the longitudinal direction as a terminal arrangement direction. And two shells (shield members) attached to the housing.

  The housing has two side walls extending in the terminal arrangement direction and facing each other in a connector width direction (a direction perpendicular to the terminal arrangement direction), and each side wall connects the plurality of terminals in the terminal arrangement direction. Arrays are held at regular intervals. The terminals are all made in the same shape, and the connection part for connecting to the pad formed on the circuit board extends outward in the connector width direction at the same height position as the bottom surface of the housing. Yes.

  Of the plurality of terminals arranged and held on each side wall, two terminals located adjacent to each other in the central region in the terminal arrangement direction are used as ground terminals, and the other terminals are used as signal terminals. The connection portion of the signal terminal is a signal connection portion, and the connection portion of the ground terminal is a ground connection portion, and is connected to a corresponding pad, that is, a signal pad or a ground pad by soldering.

  The shell includes a side plate portion extending in the terminal arrangement direction so as to cover the outer surface of the side wall over the terminal arrangement range, and extending from the lower edge of the side plate portion at a plurality of positions in the terminal arrangement direction, and having the same height as the terminal connection portion described above And a ground leg bent outward in the connector width direction at this position. The ground leg portion is located at both sides of the terminal arrangement range and the central region in the terminal arrangement range in the terminal arrangement direction, and in the connector width direction, at the same position as the terminal connection portion, that is, in the same row as the connection portion. So as to be located. The ground leg provided in the central region is located between two adjacent ground connection portions provided in the central region and is close to these ground connection portions. Therefore, when the electrical connector for a circuit board is mounted on the circuit board, the ground leg and the two ground connecting parts located on both sides of the ground leg are a single cover that covers the leg and the connecting part together. Connected to a common ground pad.

JP2008-218095

  Since the circuit board electrical connector of Patent Document 1 requires two ground terminals in the central region of the terminal arrangement range, the ground terminal is compared with the case where only one ground terminal is provided in the central region. Therefore, the number of the signal terminals needs to be increased to another position in the terminal arrangement direction, and the connector in the terminal arrangement direction becomes larger.

  If the number of terminals of the electrical connector for circuit board in Patent Document 1 is reduced by one and only one ground terminal is provided in the central area, the connector in the terminal arrangement direction can be reduced in size. However, in this case, since the ground leg portion of the shell is located between the ground terminal and the signal terminal adjacent to the ground terminal in the central region, the ground leg portion and the signal connection portion of the signal terminal are It will be too close. Therefore, in the circuit board, the ground pad to which the ground leg portion is connected and the signal pad to which the signal connection portion is connected are formed at a position that is excessively close to the circuit board. When the connector is mounted, there is a possibility that the solder of each pad is connected, and both pads are electrically short-circuited.

  In view of such circumstances, the present invention provides an electrical connector for a circuit board and an electrical connector that can reliably connect the connection portion of each terminal and the ground leg portion of the shield member to the corresponding pads without increasing the size in the terminal arrangement direction. It is an object to provide a connector mounting body.

<First invention>
An electrical connector for a circuit board according to the first aspect of the present invention is an electrical connector for a circuit board disposed on the circuit board, and a housing extending with a direction parallel to the mounting surface of the circuit board as a longitudinal direction. A plurality of terminals arranged and held in the housing with the longitudinal direction as a terminal arrangement direction, and a shield member attached to the housing, the housing facing a mounting surface of a circuit board and extending in the terminal arrangement direction A bottom wall and side walls that extend from both sides of the bottom wall in the connector width direction perpendicular to the terminal arrangement direction and extend in the terminal arrangement direction. And the signal terminal and the ground terminal are mixed and held on the side wall, and the signal terminal is connected to a signal pad on the circuit board. And the ground terminal has a ground connection exposed from the bottom wall to be connected to the ground pad of the circuit board, and the shield. The member includes a side plate portion extending over a terminal arrangement range along the outer surface of the side wall at a position outside the terminal in the connector width direction, and a position corresponding to the ground connection portion of the ground terminal in the terminal arrangement direction. And a ground leg portion extending from the side plate portion toward the circuit board.

  In such an electrical connector for a circuit board, in the present invention, the signal connection portion of the signal terminal and the ground connection portion of the ground terminal are positioned inward of the outer surface of the side plate portion of the shield member in the connector width direction. The ground connection portion of the ground terminal is located between the signal connection portions of two signal terminals adjacent in the terminal arrangement direction, and the ground leg portion of the shield member is the signal connection portion in the connector width direction. And a signal connection portion which is connected to the ground pad of the circuit board at a position outside the outermost end of the ground connection portion and is located on both sides of the ground connection portion corresponding to the ground leg portion. In the region between them, it is located with the range which overlaps with the said ground connection part in the said terminal arrangement | positioning direction, It is characterized by the above-mentioned.

  In the electrical connector for circuit boards as already described in Patent Document 1, since there are a large number of terminals arranged, in order to avoid the tendency to become large in the terminal arrangement direction, the terminals in the same direction are arranged. There is a great demand for downsizing due to high density arrangement. In the present invention, the ground leg portion of the shield member is connected to the ground pad of the circuit board at a position outside the outermost end of the signal connection portion and the ground connection portion in the connector width direction. As a result, it is not necessary to position the ground leg portion of the shield member between the terminals adjacent in the terminal arrangement direction, and accordingly, the distance between the terminals can be made closer. Therefore, the number of signal terminals can be increased without increasing the size of the connector in the terminal arrangement direction. In addition, when there is no need to increase the number of signal terminals, the connector can be miniaturized in the terminal arrangement direction as the distance between the terminals is increased.

  In the present invention, the ground leg portion of the shield member is not excessively close to the terminal connection portion in the terminal arrangement direction. That is, unlike the conventional case, it is not necessary to use both of the connection portions of the two terminals that are excessively close to the ground leg portions on both sides of the ground leg portion of the shield member as ground connection portions. Therefore, the number of ground terminals can be reduced by one, and also in this respect, the connector can be reduced in size in the terminal arrangement direction. Furthermore, in the present invention, since the ground leg portion of the shield member is positioned with a range overlapping the ground terminal in the terminal arrangement direction, the connector can be further miniaturized in the terminal arrangement direction by the overlap range.

  Further, in the electrical connector for circuit board according to the present invention, the ground leg portion of the shield member is located outside the outermost end of the ground connection portion corresponding to the ground leg portion in the connector width direction, and the terminal arrangement direction Then, it is located in the area | region between the signal connection parts located adjacent to the both sides of the said ground connection part. Therefore, even if the ground leg portion is disposed so as to be close to the ground connection portion of the ground terminal in the connector width direction, it is not excessively close to the signal connection portions on both sides. Therefore, in the circuit board, the ground pads corresponding to the ground leg portions correspond to the signal connection portions on both sides even if they are close to the ground pads corresponding to the ground connection portions in the connector width direction. A sufficient distance can be secured between the signal pads in the terminal arrangement direction. As a result, when the connector is mounted, there is no possibility that the ground pad corresponding to the ground leg and the two signal pads are erroneously connected by solder. Even if the ground pads adjacent to each other, that is, the ground pads corresponding to the ground leg portions and the ground pads corresponding to the ground connection portions are connected by solder, they are the same. There is no problem because the pad is grounded. Therefore, the connection portion of each terminal and the ground leg portion of the shield member can be reliably connected to the corresponding pads.

  Moreover, in this invention, a ground leg part can be provided close to the outermost end of the connection part of a terminal in the connector width direction. Therefore, even if the size of the connector is slightly larger in the connector width direction compared to the conventional case, the increase is minimized because the ground leg is positioned outside the terminal connection in the connector width direction. Can be stopped.

  In the present invention, the ground connection portion of the ground terminal and the ground leg portion of the shield member may be shifted from each other so as to have a partially overlapping range in the terminal arrangement direction. Even when the circuit board electrical connector is viewed from the outside in the connector width direction by shifting the ground connection portion and the ground leg portion in this way, not only the ground leg portion but also the ground connection portion. Can also be visually observed. Therefore, before mounting the receptacle connector 1 on the circuit board, it can be easily confirmed by visual inspection whether both the ground leg portion and the ground connection portion are flat at the same height. Also, after mounting the connector on the circuit board, it can be easily confirmed by visual inspection whether both the ground leg portion and the ground connection portion are properly soldered to the ground pad of the circuit board.

  The ground connection portion of the ground terminal and the ground leg portion of the shield member may be connected to a single pad that is commonly used as each ground pad.

<Second invention>
The electrical connector mounting body according to the second invention of the present invention is characterized in that the above-described electrical connector for circuit board is mounted on the circuit board.

  As described above, in the present invention, since the ground leg portion of the shield member is located outside the outermost end of the connection portion of the terminal in the connector width direction, between the adjacent terminals in the terminal arrangement direction. It is not necessary to position the ground leg portion, and the space between the terminals can be made closer accordingly. Therefore, the number of signal terminals can be increased without increasing the size of the connector in the terminal arrangement direction. In addition, when there is no need to increase the number of signal terminals, the connector can be miniaturized in the terminal arrangement direction as the distance between the terminals is increased. Further, since the ground leg portion is located in an overlapping range with the ground connection portion of the ground terminal in the terminal arrangement direction, the connector can be downsized in this point arrangement direction.

  Further, since the ground leg portion of the shield member is located in the region between the signal connection portions located on both sides of the ground connection portion corresponding to the ground leg portion, the ground leg portion is connected to the terminal in the connector width direction. Even if it is close to the connection part, a sufficient distance can be secured in the terminal arrangement direction between the ground leg part and the signal connection part of the signal terminal, and the connection part of each terminal and the ground leg part of the shield member correspond respectively. Can be securely connected to the pad. Further, by bringing the ground leg portion close to the terminal connection portion in the connector width direction, it is possible to minimize the increase in size of the connector in the connector width direction.

It is a perspective view which shows the receptacle connector which concerns on embodiment of this invention with the plug connector which is a mating connector, and has shown the state before connector fitting. It is a perspective view which shows the state before attachment of the shield member of the receptacle connector of FIG. FIG. 2 is a cross-sectional view taken along a plane perpendicular to the terminal arrangement direction of the receptacle connector of FIG. 1, (A) is a cross-section at the position of the signal terminal, (B) is a cross-section at the position of the ground terminal, The cross section in the position of the contact piece of a shield member is shown. It is the side view which looked at a part of receptacle connector of Drawing 1 in the connector width direction. It is sectional drawing in the surface at right angles to the terminal arrangement direction of the receptacle connector in the connector fitting state, and a plug connector, (A) is a cross section in the position of a signal terminal, (B) is in the position of a ground terminal. The cross section (C) shows a cross section at the position of the contact piece of the shield member. (A) is a sectional view showing a modified example of this embodiment, and (B) is a sectional view showing still another modified example, in a direction perpendicular to the terminal arrangement direction at the position of the ground terminal in the connector terminal arrangement direction. Shown in cross section.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a receptacle connector 1 according to an embodiment of the present invention together with a plug connector 2 as a mating connector, and shows a state before connector fitting. FIG. 2 is a perspective view showing a state before the shield member 30 of the receptacle connector 1 of FIG. 1 is attached. 3 is a cross-sectional view taken along a plane perpendicular to the terminal arrangement direction of the receptacle connector 1 of FIG. 1, wherein (A) is a cross-section at the position of the signal terminal 20S, and (B) is a position of the ground terminal 20G. (C) shows the cross section at the position of the contact piece 35 of the shield member 30.

  The receptacle connector 1 and the plug connector 2 as a mating connector of the receptacle connector 1 according to the present embodiment are circuit board electrical connectors arranged on mounting surfaces of different circuit boards (not shown). A connector assembly having a direction perpendicular to the mounting surface (vertical direction in FIG. 1) as an insertion / extraction direction is configured.

  As shown in FIG. 1, the receptacle connector 1 includes a receptacle-side housing 10 having a substantially rectangular parallelepiped outer shape, and the receptacle-side housing 10 in two rows at equal intervals with the longitudinal direction of the receptacle-side housing 10 as a terminal arrangement direction. And a plurality of terminals 20 arranged and held, and a shield member 30 attached to the receptacle-side housing 10 so as to cover the peripheral wall 13 of the receptacle-side housing 10. The receptacle connector 1 is arranged and mounted on a circuit board in the posture shown in FIG.

  The receptacle-side housing 10 is made of, for example, an electrical insulating material such as resin, and extends in one direction parallel to the mounting surface of the circuit board as a longitudinal direction (terminal arrangement direction). The receptacle-side housing 10 rises upward from the bottom wall 11 and extends in the terminal arrangement direction in FIG. 1 with a bottom wall 11 (see FIG. 3C) parallel to the mounting surface. It has a protruding wall 12 and a frame-shaped peripheral wall 13 that stands upward from the bottom wall 11 and surrounds the protruding wall 12. The peripheral wall 13 includes a pair of side walls 14 extending in the terminal arrangement direction, and a pair of end walls 15 extending in the connector width direction perpendicular to the terminal arrangement direction and connecting the ends of the pair of side walls 14. Have. An annular space opening upward between the protruding wall portion 12 and the peripheral wall 13 is formed as a receiving portion 16 for receiving the peripheral wall 43 as a fitting portion of the plug connector 2.

  In the receptacle housing 10, terminal accommodating portions 17 for holding the terminals 20 form two rows symmetrical in the connector width direction with respect to the longitudinal center line of the protruding wall portion 12, and are equally spaced in the terminal arrangement direction. An array is formed. As shown in FIGS. 3A and 3B, each terminal accommodating portion 17 penetrates the bottom wall 11 in the vertical direction and the vertical groove portion 17 </ b> A extending from the side surface of the protruding wall portion 12 and extending in the vertical direction. A lateral groove portion 17B extending in the connector width direction and a terminal holding hole portion 17C penetrating in the vertical direction on the side wall 14 are provided.

  As shown in FIG. 1, a shield member holding portion 15 </ b> A- 1 for holding a shield member 30 described later is provided on the outer surface of the end wall 15 located on the extension of the outer surface of the side wall 14 of the receptacle-side housing 10. Is formed so as to protrude from the lower portion of the outer surface in the connector width direction. Shield member holding grooves 15A-2 are formed on both side surfaces (surfaces perpendicular to the terminal arrangement direction) of the shield member holding portion 15A-1 so as to sunk from the side surfaces and extend in the vertical direction.

  A contact piece receiving groove 14A for receiving a contact piece 35 of a shield member 30 described later is provided on the inner side surface of the side wall 14 at a position outside the terminal arrangement range in the terminal arrangement direction. It is formed over the side surface (see also FIG. 3C). As is often seen in FIG. 3C, the contact piece housing groove 14 </ b> A has a lateral groove portion 14 </ b> A- 1 sunk from the upper surface of the side wall 14 and a vertical groove portion 14 </ b> A- 2 sunk from the inner side surface of the side wall 14. ing.

  The terminal 20 is made by punching the metal plate member in the thickness direction while maintaining the flat surface of the metal plate member. The plurality of terminals 20 arranged in each column are a mixture of signal terminals 20S and ground terminals 20G. In this embodiment, as seen in FIG. 1, one ground terminal 20G is provided at each of two positions within the terminal arrangement range. That is, each ground terminal 20G is located between two signal terminals 20S adjacent in the terminal arrangement direction (see also FIG. 4).

  As shown in FIG. 3A, the signal terminal 20 </ b> S includes a base 21 </ b> S extending in the connector width direction within the lateral groove 17 </ b> B of the terminal accommodating portion 17, and one end of the base 21 </ b> S within the vertical groove 17 </ b> A of the terminal accommodating 17. A contact arm portion 22S extending upward, a held arm portion 23S extending upward from the base portion 21 at a position near the other end of the base portion 21 and held in the terminal holding hole portion 17C of the terminal accommodating portion 17, And a signal connection portion 24S extending downward from the other end of the base portion 21S.

  The contact arm portion 22S is elastically deformable in the connector width direction, and a contact protrusion 22S-1 that protrudes outward in the connector width direction and is located in the receiving portion 16 is formed at the upper end of the contact arm portion 22S. ing. The held arm 23S is formed with a held protrusion 23S-1 that protrudes outward in the connector width direction at an intermediate position in the vertical direction. Further, the signal connection portion 24S is located in the range of the receptacle-side housing 10 in the connector width direction, that is, inward from the outer surface of the side wall 14. The lower end of the signal connection portion 24S is exposed from the bottom wall 11 and is soldered to a signal pad PS on a circuit board (not shown).

  The signal terminal 20 </ b> S having such a configuration is inserted into the receptacle-side housing 10 by press-fitting the held arm portion 23 </ b> S of the terminal 20 into the terminal holding hole portion 17 </ b> C formed in the side wall 14 from below (the bottom wall 11 side). It is attached. Then, the held projection 23S-1 of the held arm 23S bites into the inner wall surface of the terminal holding hole 17C, whereby the signal terminal 20S is held in the terminal accommodating portion 17.

  As shown in FIG. 3B, since the ground terminal 20G has the same shape as the signal terminal 20S, the symbol “S” for the signal terminal 20S is replaced with “G” for the ground terminal 20G. Description is omitted. Further, the connection portion 24G of the ground terminal 20G is referred to as a “ground connection portion 24G” in order to clearly distinguish it from the signal connection portion 24S of the signal terminal 20S. A ground pad to which the ground connection portion 24G is solder-connected is referred to as a “ground pad PG” (see FIG. 3B). 3B, similarly to the signal connection portion 24S, the ground connection portion 24G is also within the range of the receptacle-side housing 10 in the connector width direction, that is, inward of the outer surface of the side wall 14. positioned. The lower end of the ground connection portion 24G is exposed from the bottom wall 11, and is solder-connected to a ground pad PG of a circuit board (not shown).

  As seen in FIGS. 1 and 2, the shield member 30 is made by punching a metal plate member into a predetermined shape and then bending it in the plate thickness direction. As shown in FIG. 1, the shield member 30 includes an upper plate portion 31 that covers the upper surfaces of both end walls 15 of the receptacle-side housing 10, and a right angle downward at both end edges of the upper plate portion 31 in the connector width direction. And is held in the receptacle side housing 10 while being covered with the receptacle-side housing 10 and extending in the terminal arrangement direction and covering the side wall 14 outside the terminal arrangement range. End plate portion 33 that is bent toward the end and covers the end wall surfaces of both end walls 15 and extends continuously in the terminal arrangement direction along the side wall 14 from the held side plate portion 32 and covers the outer surface of the side wall 14 in the terminal arrangement range. Side plate portion 34.

  As is often seen in FIG. 2, the held-side plate portion 32 is bent at the upper edge thereof in the connector width direction downward and extends into the receiving portion 16, and the contact in the terminal arrangement direction. A held recessed portion 36 that opens downward at a position outside the piece 35 and a wide ground leg portion 37 that extends from the lower edge of the held side plate portion 32 at substantially the same position as the contact piece 35 in the terminal arrangement direction. ing.

  As shown in FIG. 3C, the contact piece 35 has a base portion (a portion connected to the upper edge of the held side plate portion 32) of the contact piece receiving groove 14 </ b> A of the receptacle side housing 10. Although it is accommodated in the portion 14A-1, the free end side (lower end side) portion is located outside the vertical groove portion 14A-2 of the contact piece accommodating groove 14A and extends into the receiving portion 16. This free end portion can be elastically deformed in the plate thickness direction (connector width direction), and in contact with the contact protrusion 61A of the ground metal fitting 60 of the plug connector 2 to be described later in the connector fitting state. Contact. Further, the elastic deformation of the free end side portion is allowed by the vertical groove portion 14A-2 of the contact piece housing groove 14A (see FIG. 5C).

  As shown in FIG. 1, the held recess 36 can receive the shield member holding portion 15 </ b> A- 1 of the receptacle-side housing 10 from below, and both edges extending in the vertical direction forming the held recess 36. The portion is press-fitted into the shield member holding groove 15A-2 of the shield member holding portion 15A-1 from above, whereby the shield member 30 is held in the receptacle-side housing 10. Further, the wide ground leg portion 37 is bent at a right angle at the lower edge of the held side plate portion 32 and extends outward in the connector width direction.

  As shown in FIG. 1, the side plate portion 34 is narrower than the wide ground leg portion 37 at two positions in the terminal arrangement direction, specifically, at a position corresponding to the ground connection portion 24G of the ground terminal 20G. A narrow ground leg 38 is provided. The narrow ground leg portion 38 is bent at a right angle at the lower edge of the side plate portion 34 and extends outward in the connector width direction. 3B and 3C, the wide ground leg portion 37 and the narrow ground leg portion 38 are connected to the connection portion 24 of the terminal 20 in the connector width direction, that is, the signal connection portion 24S and the ground connection portion. It is located outside 24G.

  FIG. 4 is a side view of a part of the receptacle connector 1 of FIG. 1 as viewed in the connector width direction. As shown in FIG. 4, the narrow ground leg portion 38 is located within the region between the signal connection portions 24S located on both sides of the ground connection portion 24G corresponding to the narrow ground leg portion 38 (in FIG. (Shown as “A”). That is, the narrow ground leg portion 38 does not have a range overlapping with the signal connection portions 24S located on both sides in the terminal arrangement direction (left and right direction in FIG. 4). Further, the narrow ground leg portion 38 is positioned with a range overlapping with the ground connection portion 24G in the terminal arrangement direction.

  In this embodiment, as shown in FIG. 4, the width dimension W1 in the terminal arrangement direction of the narrow ground leg portion 38 of the shield member 30 is the width dimension (plate thickness dimension) in the same direction of the ground connection portion 24G. It is smaller than W2. Further, the narrow ground leg portion 38 is positioned so as to be shifted to one side (right side in FIG. 4) in the terminal arrangement direction with respect to the ground connection portion 24G within the range of the width dimension of the ground connection portion 24G. . Therefore, even when the receptacle connector 1 is viewed from the outside in the connector width direction (direction perpendicular to the paper surface in FIG. 4), not only the narrow ground leg portion 38 but also the ground connection portion 24G is provided. Visible. As a result, before the receptacle connector 1 is mounted on the circuit board, it can be easily visually confirmed whether or not both the narrow ground leg portion 38 and the ground connection portion 24G are positioned at the same height. Further, after the receptacle connector 1 is mounted on the circuit board, it can be easily visually confirmed whether both the narrow ground leg portion 38 and the ground connection portion 24G are properly soldered to the ground pad PG of the circuit board. .

  As shown in FIG. 1, the wide ground leg 37 and the narrow ground leg 38 of the shield member 30 are solder-connected to the ground pad PG of the circuit board. Further, in this embodiment, as is often seen in FIGS. 1 and 3B, the narrow ground leg portion 38 is for ground to which the ground connection portion 24G corresponding to the narrow ground leg portion 38 is connected. Connected to pad PG. That is, as shown in FIG. 3B, the ground pad PG is formed as one pad extending over a range including both the ground connection portion 24G and the narrow ground leg portion 38 in the connector width direction. The ground connection portion 24G and the narrow ground leg portion 38 are commonly used as ground pads.

  As shown in FIG. 2, the shield member 30 is held by press-fitting both edge portions of the held recessed portion of the held side plate portion 32 from above the receptacle side housing 10 into the shield member holding groove 15 </ b> A- 2. With the shield member 30 attached, as shown in FIGS. 1 and 3C, the contact piece 35 of the shield member 30 has a base portion formed on the lateral groove portion 14A-1 of the contact piece accommodation groove 14A. While being accommodated, the free end portion extends into the receiving portion 16. Further, the narrow ground leg portion 38 is located at substantially the same position as the ground connection portion 24G in the terminal arrangement direction, and outside the signal connection portion 24S and the ground connection portion 24G in the connector width direction.

  Next, the configuration of the plug connector 2 as a mating connector will be described with reference to FIGS. The plug connector 2 includes a plug-side housing 40 having a substantially rectangular parallelepiped outer shape, and a plurality of mating terminals 50 arranged and held at equal intervals in two rows by the plug-side housing 40 with the longitudinal direction of the plug-side housing 40 as a terminal arrangement direction. And a plurality of ground fittings 60 held by both end portions (end wall 45 described later) of the plug-side housing 40 in the longitudinal direction. As shown in FIGS. 1 and 5, the plug connector 2 is fitted and connected to the receptacle connector 1 such that a receiving portion 46 (see FIGS. 5A and 5B), which will be described later, opens downward. .

  The plug-side housing 40 is made of, for example, an electrical insulating material such as resin, and extends in one direction parallel to the mounting surface of the circuit board as a longitudinal direction (terminal arrangement direction). The plug-side housing 40 includes a bottom wall 41 parallel to the mounting surface, and a peripheral wall as a frame-like fitting portion that rises downward from the bottom wall 41 as seen in FIGS. 43. The peripheral wall 43 includes a pair of side walls 44 extending in the terminal arrangement direction and a pair of end walls 45 extending in the connector width direction perpendicular to the terminal arrangement direction and connecting the ends of the pair of side walls 44. Have. A space surrounded by the peripheral wall 43 and opened downward is formed as a receiving portion 46 for receiving the protruding wall portion 12 of the receptacle connector 1.

  As is often seen in FIG. 5C, the end wall 45 has ground metal fitting housing portions 45A for press-fitting and holding the ground metal fittings 60 on both sides in the connector width direction at right angles to the terminal arrangement direction. It is formed in a slit shape that expands. Each of the two ground metal parts receiving portions 45A formed on one end wall has a substantially U-shaped cross section perpendicular to the terminal arrangement direction, and is symmetrical with respect to the center position in the connector width direction. There is no.

  As shown in FIG. 5C, each of the ground metal fitting receiving portions 45A extends in the vertical direction at the outer position in the connector width direction and is open to the outside in the connector width direction. 45A-1, a holding hole 45A-2 extending upward at an inner position than the outer groove 45A-1 in the connector width direction, an outer groove 45A-1 and a holding hole 45A-2 extending in the connector width direction And connecting groove portions 45A-3 that are open downward.

  The mating terminal 50 is made by bending a strip-like piece obtained by punching a metal plate in the thickness direction. The plurality of mating terminals 50 arranged in each row include mating signal terminals 50S and mating ground terminals 50G. In the present embodiment, one mating ground terminal 50G is provided at each of two positions within the terminal arrangement range corresponding to the ground terminal 20G of the receptacle connector 1. That is, the counterpart ground terminal 50G is located between two counterpart signal terminals 50S adjacent in the terminal arrangement direction. As shown in FIGS. 1 and 5, the mating terminals 50 are integrally molded and held on the respective side walls 44 of the plug-side housing 40, and are arranged at equal intervals in the longitudinal direction of the side walls 44. Yes.

  As shown in FIG. 5A, the mating signal terminal 50S is bent in a crank shape from the side wall 44 and extends outward in the connector width direction at substantially the same height as the bottom wall 41 of the plug-side housing 40. And a contact arm portion 52S bent continuously downward in FIG. 5A and embedded and held in the side wall 44.

  The contact arm portion 52S extends downward along the inner surface of the side wall 44 and is bent so that the lower end of the contact arm portion 52S is folded upward on the outer side in the connector width direction. The plate surface of the portion extending along the inner surface of the side wall 44 is exposed toward the receiving portion 46 so as to form the same surface as the inner surface of the side wall 44. A contact recess 52S-1 for receiving the contact protrusion 22S-1 of the terminal 20 of the receptacle connector 1 and making contact with the contact protrusion 22S-1 is formed on the exposed plate surface of the contact arm 52S from the plate surface. It is formed by sinking. Further, the signal connection portion 51 </ b> S extends out of the range of the plug-side housing 40 in the connector width direction, that is, outward from the outer surface of the side wall 44. The signal connection portion 51S is exposed from the bottom wall 41 and is solder-connected to a signal pad (not shown) on the circuit board.

  As shown in FIG. 5B, the counterpart ground terminal 50G has exactly the same shape as the counterpart signal terminal 50S. Therefore, for the counterpart ground terminal 50G, the symbol “S” for the counterpart signal terminal 50S is changed to “G”. The description is omitted. Further, the connection portion 51G of the counterpart ground terminal 50G is referred to as a “ground connection portion 51G” in order to clearly distinguish it from the signal connection portion 51S of the counterpart signal terminal 50S.

  The ground metal fitting 60 is made by punching the metal plate member while maintaining the flat surface of the metal plate member. As is often seen in FIG. 5C, the ground metal fitting 60 includes an outer leg portion 61 extending in the vertical direction within the outer groove portion 45A-1 of the plug-side housing 40 and a vertical direction within the holding hole portion 45A-2. A held portion 62 that extends, a connecting portion 63 that extends in the connector width direction in the connecting groove portion 45A-3 and connects the outer leg portion 61 and the lower portion of the held portion 62, and an outer leg portion 61 outside the outer groove portion 45A-1. And a ground leg portion 64 extending outward in the connector width direction. A contact protrusion 61A for elastic contact with the contact piece 35 of the shield member 30 of the receptacle connector 1 is provided on the outer leg 61 from the lower part of the side edge of the outer leg 61 in FIG. It is formed to protrude outward.

  The ground metal fitting 60 is held by the ground metal fitting housing portion 45A by press-fitting the held portion 62 into the holding hole portion 45A-2 of the plug-side housing 40 from below in FIG. As can be seen in FIG. 5C, the contact protrusion 61A protrudes from the outer groove 45A-1. The ground leg portion 64 is exposed from the bottom wall 41 and is solder-connected to a ground pad (not shown) of the circuit board.

  Next, a connector fitting operation between the receptacle connector 1 and the plug connector 2 will be described with reference to FIGS. 1 and 6. First, the receptacle connector 1 is mounted on the mounting surface of the circuit board corresponding to the receptacle connector 1 by solder connection. Specifically, the signal connection portion 24S of the signal terminal 20S is soldered to the signal pad PS corresponding to the signal connection portion 24S. The ground connection portion 24G of the ground terminal 20G and the narrow ground leg portion 38 of the shield member 30 corresponding to the ground connection portion 24G are solder-connected to the same ground pad PG. The wide ground legs 37 of the shield member 30 are soldered to the ground pads PG corresponding to the wide ground legs 37, respectively.

  The plug connector 2 is mounted on the mounting surface of the circuit board corresponding to the plug connector 2 by solder connection. Specifically, the signal connection portion 51S of the counterpart signal terminal 50S, the ground connection portion 51G of the counterpart ground terminal 50G, and the ground leg portion 64 of the ground metal fitting 60 are solder-connected to the corresponding signal pads or ground pads, respectively. .

  Next, as shown in FIG. 1, the receptacle connector 1 is set in a posture in which the receiving portion 16 is opened upward, and the receiving portion 46 of the plug connector 2 (see FIG. 5 (A) above the receptacle connector 1. ), (B)) is open downward. Then, the plug connector 2 is lowered while maintaining the posture of FIG. 1 so that the protruding wall portion 12 of the receptacle connector 1 enters the receiving portion 46 of the plug connector 2 from below, and the peripheral wall 43 of the plug connector 2 is received by the receptacle. The connector 1 is inserted into the receiving portion 16 from above. As a result, as shown in FIGS. 5A and 5B, the contact protrusion 22S-1 of the signal terminal 20S and the contact protrusion 22G-1 of the ground terminal 20G of the receptacle connector 1 are respectively connected to the plug connector 2. The terminals enter into the contact recess 52S-1 of the mating signal terminal 50S and the contact recess 52G-1 of the mating ground terminal 50G to make electrical contact between the terminals.

  5C, the contact protrusions 61A of the ground metal fitting 60 of the plug connector 2 direct the contact pieces 35 of the shield member 30 of the corresponding receptacle connector 1 outward in the connector width direction. By pressing and elastically deforming, the contact piece 35 comes into contact with contact pressure.

  In this manner, the terminals 20 and 50 are connected to each other, and the contact piece 35 of the shield member 30 and the contact protrusion 61A of the ground metal fitting 60 are connected to each other, whereby the connector fitting operation is completed.

  In the present embodiment, the narrow ground leg portion 38 of the shield member 30 is connected to the ground pad PG of the circuit board on the outer side in the connector width direction than the connection portion 24 of the terminal 20. Accordingly, it is not necessary to position the ground leg portion of the shield member between the terminals adjacent in the terminal arrangement direction, and accordingly, the distance between the terminals can be made closer. Therefore, the number of signal terminals 20S can be increased without increasing the size of the receptacle connector 1 in the terminal arrangement direction. In addition, when it is not necessary to increase the number of signal terminals 20S, the receptacle connector 1 can be reduced in size in the terminal arrangement direction by increasing the distance between the terminals. The connector can be miniaturized in the terminal arrangement direction.

  In the present embodiment, the narrow ground leg portion 38 of the shield member 30 is not excessively close to the connection portion 24 of the terminal 20 in the terminal arrangement direction. That is, unlike the conventional case, it is not necessary to use both of the connection portions of the two terminals that are excessively close to the ground leg portions on both sides of the ground leg portion of the shield member as ground connection portions. Therefore, according to the present embodiment, one ground terminal corresponding to one ground leg can be reduced, and also in this respect, the receptacle connector 1 can be downsized in the terminal arrangement direction. Furthermore, in the present embodiment, the narrow ground leg portion 38 of the shield member 30 is positioned with a range that overlaps the ground terminal 20G in the terminal arrangement direction, so that the connector is positioned in the terminal arrangement direction by the overlap range. Further downsizing can be achieved.

  In the receptacle connector 1 according to the present embodiment, the narrow ground leg portion 38 of the shield member 30 is located outside the ground connection portion 24G corresponding to the narrow ground leg portion 38 in the connector width direction (FIG. 3). (See (B)), in the terminal arrangement direction, the overlapping range in the terminal arrangement direction with respect to the signal connection portion 24S in the region between the signal connection portions 24S located adjacent to both sides of the ground connection portion 24G. (See FIG. 4). Therefore, even if the narrow ground leg portion 38 is disposed so as to be close to the ground connection portion 24G of the ground terminal 20G in the connector width direction, it is not excessively close to the signal connection portions 24S on both sides. Therefore, in the circuit board, the ground pads PG corresponding to the ground connection portions 24G and the narrow ground legs 38 are arranged between the signal pads PS corresponding to the signal connection portions 24S on both sides. Sufficient distance can be secured in the direction. As a result, when the connector is mounted, there is no possibility that the ground pad PG corresponding to both the ground connection portion 24G and the narrow ground leg portion 38 and the two signal pads are connected by solder. Therefore, the connection part 24 of each terminal 20 and the narrow ground leg part 38 of the shield member 30 can be reliably connected to the corresponding pads.

  In the present embodiment, since the ground leg 24G is located in the range of the receptacle-side housing 10 in the connector width direction, that is, inward of the outer surface of the side wall 14, the width of the shield member 30 in the connector width direction A narrow ground leg 38 can be provided proximate to the connection 24 of the terminal 20. Accordingly, even if the size of the receptacle connector 1 is slightly larger in the connector width direction as compared with the prior art, the narrow ground leg portion 38 is located outside the connection portion 24 of the terminal 20 in the connector width direction. The increase can be kept to a minimum.

  In the present embodiment, the ground connection portion 24G of the ground terminal 20G and the narrow ground leg portion 38 of the shield member 30 are connected to one ground pad PG, but instead of this, the ground connection portion 24G and The narrow ground legs 38 may be connected to different ground pads. In this case, in the circuit board, the ground pad to which the ground connection portion 24G is connected and the ground pad to which the narrow ground leg portion 38 is connected are located close to each other in the connector width direction. However, even if the separate ground pads corresponding to the ground connection portion 24G and the narrow ground leg portion 38 are connected to each other by soldering when the connector is mounted, they are also grounded. There is no problem because it is a pad to be used.

  Further, in the present embodiment, the ground connection portion 24G and the narrow ground leg portion 38 are shifted to one side in the terminal arrangement direction, but instead, for example, the ground connection portion 24G and The narrow ground leg portion 38 may be provided such that the centers in the terminal arrangement direction coincide with each other. Even when the centers are matched in this way, both the ground connection portion 24G and the narrow ground leg portion 38 can be visually observed from the outside in the connector width direction. Accordingly, before the receptacle connector 1 is mounted on the circuit board, it is determined whether both the narrow ground leg portion 38 and the ground connection portion 24G are flat at the same height, and after the mounting, Whether both the narrow ground leg portion 38 and the ground connection portion 24G are properly solder-connected to the ground pad PG of the circuit board can be easily confirmed visually.

  In the present embodiment, the entire narrow ground leg portion 38 is positioned within the range of the width dimension of the ground connection portion 24G in the terminal arrangement direction. Only the portion may be positioned within the width dimension range of the ground connection portion 24G in the terminal arrangement direction, and the narrow ground leg portion 38 and the ground connection portion 24G may be shifted from each other so as to have a partially overlapping range. . Even in such a positional relationship, both the ground connection portion 24G and the narrow ground leg portion 38 can be visually observed from the outside in the connector width direction. Accordingly, before the receptacle connector 1 is mounted on the circuit board, it is determined whether both the narrow ground leg portion 38 and the ground connection portion 24G are flat at the same height, and after the mounting, Whether both the narrow ground leg portion 38 and the ground connection portion 24G are properly solder-connected to the ground pad PG of the circuit board can be easily confirmed visually.

  In the present embodiment, the ground connection portion 24G and the narrow ground leg portion 38 are positioned so as to partially overlap each other. For example, the ground connection portion and the ground leg portion are connected to the terminal. The same dimension may be formed in the arrangement direction, and the centers in the terminal arrangement direction may coincide with each other, that is, the entire ranges may overlap with each other in the terminal arrangement direction. Alternatively, the ground leg portion may be formed with a dimension larger in the terminal arrangement direction than the ground connection portion, and the ground leg portion may be provided at a position including the entire ground connection portion in the terminal arrangement direction.

  When the ground connection portion and the ground leg portion are provided with the dimensions and positions as described above, the ground leg portion is viewed from the outside in the connector width direction, that is, the direction perpendicular to the plate surface of the side plate portion of the shield member. Even if the ground connection portion cannot be visually recognized sometimes, there is no problem as long as both the ground connection portion and the ground leg portion can be visually recognized in a direction having an angle with respect to the connector width direction. That is, before mounting the receptacle connector 1 on the circuit board, it is determined whether both the narrow ground leg portion 38 and the ground connection portion 24G are flat at the same height, and after mounting, the width is narrow. It is only necessary to visually confirm whether both the ground leg portion 38 and the ground connection portion 24G are appropriately solder-connected to the ground pad PG of the circuit board from a direction having an angle with respect to the connector width direction.

  In the present embodiment, two ground terminals 20G are provided among the terminals arranged in each row. However, the number of ground terminals 20G is not limited to this, and may be one or three. It may be the above. In order to strengthen the ground function, it is preferable to provide a large number of ground terminals 20G. In addition, the position and number of the signal terminals 20S and the ground terminals 20G may be different between one terminal row and the other terminal row of the two terminal rows held by the receptacle-side housing 10. Further, in order to use the receptacle connector 1 for high-speed signal transmission, in each terminal row, an arrangement in which the ground terminals 20G are positioned on both sides of two adjacent signal terminals 20S, that is, the ground terminals 20G and the signal terminals. The arrangement is preferably such that the arrangement of 20S and signal terminal 20S is repeated.

  The shape and positional relationship of the connection portion 24 of the terminal 20 and the narrow ground leg portion 38 of the shield member 30 according to the present invention are not limited to the embodiment described with reference to FIGS. Various modifications are possible as shown in (B). FIG. 6A is a cross-sectional view showing a modification of the present embodiment, and FIG. 6B is a cross-sectional view showing a further modification, in a direction perpendicular to the terminal arrangement direction at the position of the ground terminal in the terminal arrangement direction of the connector. It is shown in the cross section at. 6 (A) and 6 (B), portions corresponding to the embodiment shown in FIGS. 1 to 5 are illustrated with “′” or “” ”added to the reference numerals of the portions. Yes.

  In the present embodiment described above with reference to FIGS. 1 to 5, the ground connection portion 24G of the ground terminal 20G is positioned within the range of the receptacle-side housing 10 in the connector width direction, as is often seen in FIG. In addition, the lower end of the narrow ground leg portion 38 of the shield member 30 is bent outward in the connector width direction at the same position as the bottom surface of the receptacle-side housing 10. On the other hand, in the modified example shown in FIG. 6A, the ground connection portion 24G ′ of the terminal 20 ′ extends outward from the receptacle-side housing 10 ′ in the connector width direction, and the shield member 30 ′. The lower portion of the ground leg portion 38 'differs from the above embodiment in that it is bent so as to avoid interference with the ground connection portion 24G'. Specifically, the lower portion of the ground leg portion 38 ′ is bent outwardly after being bent outward in the connector width direction.

  In the modified example of FIG. 6A, as can be seen from the embodiment shown in FIG. 3B, the ground connection portion 24G ′ is formed larger in the connector width direction. And a ground contact pad PG with a large contact area, and solder connection can be performed more reliably.

  The modified example of FIG. 6B differs from the present embodiment described above with reference to FIGS. 1 to 5 in that the lower portion of the ground leg portion 38 ″ of the shield member 30 ″ is not bent (see FIG. 6). 3 (B)). In the modified example of FIG. 6B, the lower portion of the ground leg portion 38 ″ does not extend outward in the connector width direction. Therefore, compared to the present embodiment, the ground leg portion 38 ″ has a lower width in the connector width direction. The size of is small. Accordingly, in the circuit board, the size in the connector width direction of the ground pad to which the ground connection portion 24G ″ of the ground terminal 20G ″ and the ground leg portion 38 ″ of the shield member 30 ″ are connected can be reduced. As a result, the space that can be used for mounting other electronic devices and the like on the mounting surface of the circuit board is increased, so that the degree of freedom in circuit design is increased.

DESCRIPTION OF SYMBOLS 1 Receptacle connector 24S Signal connection part 10 Receptacle side housing 24G Ground connection part 11 Bottom wall 30 Shield member 14 Side wall 32 Side plate part 20 Terminal 38 Narrow ground leg part (ground leg part)
20S signal terminal PS signal pad 20G ground terminal PG ground pad

Claims (4)

An electrical connector for a circuit board disposed on the circuit board,
A housing extending as a longitudinal direction in one direction parallel to the mounting surface of the circuit board; a plurality of terminals arranged and held in the housing with the longitudinal direction as a terminal arrangement direction; and a shield member attached to the housing. ,
The housing faces the mounting surface of the circuit board and extends in the terminal arrangement direction, and rises from both sides of the bottom wall in the connector width direction perpendicular to the terminal arrangement direction and the terminal arrangement direction And a side wall extending to
The plurality of terminals include a signal terminal and a ground terminal. The signal terminal and the ground terminal are mixed and held on the side wall, and the signal terminal is connected to a signal pad on the circuit board. The ground terminal has a ground connection exposed from the bottom wall to be connected to the ground pad of the circuit board. ,
The shield member has a side plate portion extending over the terminal arrangement range along the outer surface of the side wall at a position outside the terminal in the connector width direction, and a position corresponding to the ground connection portion of the ground terminal in the terminal arrangement direction. In an electrical connector for a circuit board having a ground leg portion extending from the side plate portion toward the circuit board,
The signal connection portion of the signal terminal and the ground connection portion of the ground terminal are located inward of the outer surface of the side plate portion of the shield member in the connector width direction,
The ground connection portion of the ground terminal is located between the signal connection portions of two signal terminals adjacent in the terminal arrangement direction,
The ground leg portion of the shield member is adapted to be connected to the ground pad of the circuit board at a position outside the outermost end of the signal connection portion and the ground connection portion in the connector width direction. For a circuit board, wherein the circuit board is located within an area between the signal connection portions located on both sides of the ground connection portion corresponding to the ground leg portion, with a range overlapping with the ground connection portion in the terminal arrangement direction. Electrical connector.   2. The electrical connector for a circuit board according to claim 1, wherein the ground connection portion of the ground terminal and the ground leg portion of the shield member are offset from each other so as to have a partially overlapping range in the terminal arrangement direction.   3. The circuit board electrical connector according to claim 1, wherein the ground connection portion of the ground terminal and the ground leg portion of the shield member are connected to one pad commonly used as each ground pad. The electrical connector mounting body characterized by mounting the electrical connector for circuit boards as described in any one of Claim 1 thru | or 3 on the circuit board.

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