JP2011054571A - Electric connector for circuit board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate a variation in permittivity among terminals and enables easy impedance matching. <P>SOLUTION: An electric connector for a circuit board includes: a plurality of blades 20 in each of which a plurality of terminals 21 extending in parallel with each other at predetermined intervals on one plate surface of a plate-shaped base material formed of a synthetic resin are integrally formed with a substrate; and a housing 10 that holds a blade group formed of the plurality of blades 20 arranged adjacent to one another in a terminal-arrangement direction to be located on the same surface. The housing 10 houses the blade group in corresponding housing portions separated by a partition 11 having a wall surface parallel with the plate surface of the substrate. The partition 11 has a projection 11A for holding the blades 20 in the housing formed on the plate surface of the partition wall 11 to extend in the length direction of the terminal 21. In each blade 20, a holding groove 22C that is press-fit in the longitudinal direction by the projection 11A is formed to extend in the longitudinal direction on one plate surface of the substrate. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electrical connector for connecting two circuit boards.

  As such an electrical connector, for example, an electrical connector described in Patent Document 1 is known. In Patent Document 1, a substantially rectangular parallelepiped plug connector disposed on one circuit board and a concave space disposed on the other circuit board and receiving the fitting portion of the plug connector from the opening when the connector is fitted are formed. There is disclosed a connector assembly having a receptacle connector configured.

  A housing groove for housing a plurality of terminals (contacts) is formed in a pair of opposed outer surfaces of the housing of the plug connector so as to extend in the connector fitting direction (vertical direction). A plurality of straight terminals are press-fitted into the receiving groove from below and are held by the receiving groove, and one surface of the terminal is exposed as a contact surface.

  Further, the receptacle connector is configured to accommodate a plurality of mating terminals (mating contacts) on the inner surface of the recessed space corresponding to the opposed outer surface of the housing when the plug connector is inserted into the recessed space. The accommodation groove is formed to extend in the vertical direction, and a plurality of mating terminals are held by the accommodation groove. The mating terminal extends in the vertical direction and has a lower end (end near the opening of the concave space) bent into a U-shape in the concave space, and a distal end portion of the bent portion is a terminal of the plug connector. It is formed as a contact part which elastically contacts with the contact surface.

  In the connector assembly having such a configuration, when the connector is fitted, the housing of the plug connector is fitted into the concave space of the receptacle connector, and the terminal of the plug connector and the mating terminal of the receptacle connector are in elastic contact. As a result, both circuit boards are electrically connected.

JP2007-141586

  In an electrical connector in which a terminal is press-fitted and attached to a receiving groove, such as the plug connector of Patent Document 1, the entire range of the terminal is in close contact with the surface of the receiving groove in the longitudinal direction (press-fit direction). In many cases, there is often a gap in the remainder due to partial contact. That is, an air layer is formed between the inner surface of the receiving groove and the terminal in the terminal arrangement direction. At this time, when some of the terminals of the plug connector are press-fitted into the receiving grooves with a slight inclination with respect to the vertical direction due to dimensional tolerances, the air formed in each receiving groove Variations in the state of the layers occur. In particular, the larger the dimension of the terminal and the receiving groove in the vertical direction, the greater the deviation of the press-fit terminal from the normal state, and the more likely the air layer varies.

  In recent years, there has been a strong demand for miniaturization of connectors, so connectors with a small distance (pitch) between terminals are widely used. When transmitting a high-frequency signal with such a connector, it is required to achieve impedance matching at each terminal, that is, to make all terminals have the same impedance. The impedance at each terminal is greatly influenced by the dielectric constant of the insulator and the air layer in the vicinity of the terminal, in other words, the dimensions of the insulator and the state of the air layer in the terminal arrangement direction. Therefore, in order to achieve the impedance matching, it is necessary to make the conditions in all the terminals the same including the state of the air layer formed between the terminals adjacent to each other.

  When an air layer with variations in dimensions in the terminal arrangement direction is formed as in Patent Document 1, the dielectric constant between terminals also varies, making it difficult to achieve impedance matching.

  In view of such circumstances, it is an object of the present invention to provide an electrical connector for a circuit board that easily realizes impedance matching by eliminating variations in permittivity between terminals.

  The electrical connector for circuit boards according to the present invention connects two circuit boards.

  In such an electrical connector, the present invention includes a plurality of blades in which a plurality of terminals extending in parallel with each other at a predetermined interval on one plate surface of a plate-like base material of an electrical insulating material are integrally formed with the base material, A holding member that holds a blade group composed of a plurality of blades adjacent to each other in the terminal arrangement direction so as to be positioned on the same plane, and the holding member is parallel to the plate surface of the substrate. The corresponding blade groups are accommodated in accommodating portions partitioned by a partition wall having a wall surface, and a retaining portion for holding each blade in the accommodating portion extends in the longitudinal direction of the terminal. The blades are formed on one plate surface of the base material with the held portions that are press-fitted in the longitudinal direction by the holding portions extending in the longitudinal direction. It is characterized by

  The blade is made by integrally molding a plurality of terminals with an electrical insulating material, for example, a synthetic resin base material and a mold. The terminal and the base material are integrally molded by arranging a plurality of terminals at a predetermined interval with high precision in a molding die and pouring molten resin into the die. In the integral molding, when the molten resin flows between the terminals while maintaining a predetermined distance in the molding die, and the resin is solidified to form a base material, a base between the terminals in the terminal arrangement direction is obtained. The dimensions of the material are the same. In addition, since the resin is in close contact with the terminal, no air layer is formed between the base material and the terminal. Therefore, the dielectric constant between the terminals is the same.

  The “predetermined interval” refers to an interval necessary for impedance matching between terminals. The distance between the terminals is determined depending on the thickness dimension of the terminal (direction perpendicular to both the terminal arrangement direction and the terminal longitudinal direction) and the width dimension (dimension in the terminal arrangement direction). It can also be adjusted by bending it into a crank shape.

  Since the blade has a very thin plate shape, when the number of terminals is large, even if all the terminals are arranged to be integrally molded with the base material, the molten resin may not flow sufficiently over the entire molding die. At this time, since the molten resin does not sufficiently flow between the terminals, an air layer having variations between the terminals is formed, and impedance matching cannot be achieved. In the present invention, all terminals are divided into a plurality of sets, and each set of terminals is integrally formed with a base material to produce a blade having a small dimension in the terminal arrangement direction. Therefore, since the molds for manufacturing each blade need only be small, the molten resin sufficiently flows into the entire mold, and the molten resin easily flows between the terminals. As a result, it is possible to more reliably avoid the formation of an air layer between the terminals.

  It is preferable that at least one of the holding member and the blade has a holding protrusion that holds and holds the blade at the local portion. As described above, when the blade is held and pressed by the holding protrusion at the local portion, the contact area between the blade and the holding member at the local portion is reduced. Therefore, even if an inadvertent external force is applied to the holding member of the connector arranged on the circuit board, the contact area, in other words, the stress transmission area is small, so the stress due to the external force is transmitted from the holding member to the blade. It becomes difficult. As a result, stress is not easily transmitted to the connection portion between the terminal connection portion and the corresponding circuit portion of the circuit board, and a stable connection state can be maintained.

  The blade preferably has a metal ground plate attached to the other plate surface of the base so as to cover the arrangement range of the terminals. Thus, a ground effect is acquired by attaching a ground plate to a base material.

  In the present invention, since the blade is formed by integrally molding a plurality of terminals arranged at a predetermined interval with the base material made of synthetic resin, the dimensions of the base material in the terminal arrangement direction are the same between the terminals, No air layer is formed between the terminals. Therefore, the dielectric constant between terminals is the same, and impedance matching is easily realized.

  In addition, since the terminals are divided into a plurality of groups and a blade is made for each group of terminals, the molds for manufacturing each blade can be small, and the molten resin can be poured sufficiently throughout the mold. Is possible. Therefore, since it becomes easy to pour sufficient molten resin between the terminals, it is possible to more reliably avoid the formation of an air layer between the terminals. As a result, impedance matching is more reliably realized.

It is a perspective view which shows the external appearance of the connector which concerns on this embodiment. It is a perspective view which shows the other party connector. FIG. 1A is a cross-sectional view at a position where a one-dot chain line IIA in FIG. 1A passes, and FIG. 1B is a cross-sectional view at a position where a one-dot chain line IIB in FIG. It is a perspective view which shows a braid | blade, (A) is the perspective view seen from the side in which the terminal is arranged, (B) is the perspective view seen from the side in which the ground board is attached. 3A is a cross-sectional view of FIG. 3A, FIG. 3A is a cross-sectional view taken along a dashed-dotted line IVA in FIG. 3B, and FIG. 3B is a dashed-dotted line IVB in FIG. It is sectional drawing in the position which passes. FIG. 4 is a perspective view showing the blade shown in FIG. 3B with the ground plate removed. It is the perspective view which extracted and showed a part of braid | blade from the connector which concerns on this embodiment. It is a VII-VII sectional view of Drawing 2 (A).

  FIG. 1A is a perspective view showing an appearance of the electrical connector according to the present embodiment. FIG. 2A is a cross-sectional view at a position where a one-dot chain line IIA in FIG. 1A passes, that is, a position of a signal terminal described later in the terminal arrangement direction. An electrical connector 1 according to the present embodiment (hereinafter simply referred to as “connector 1”) includes a synthetic resin housing 10 having a rectangular parallelepiped shape, a plurality of plate-like blades 20 arranged and held by the housing 10, and a connector. 1 and a plurality of metal fixing members 30 for fixing 1 on a circuit board (not shown).

  As shown in FIG. 1 (A), in the connector 1, the plurality of blades 20 are arranged in the connector width direction (left-right direction in FIG. 1 (A)) and the connector height direction (FIG. 1 (A)). ) Are arranged adjacent to each other in the width direction so as to be located on the same plane extending in the vertical direction). In the present embodiment, the housing 10 includes a plurality of blades 20 arranged in this manner, as shown in FIG. 1A, a connector perpendicular to both the connector width direction and the connector height direction. Two rows are held in the thickness direction.

  On one plate surface of the blade 20, a plurality of terminals 21 extending in parallel in the connector height direction with a predetermined interval are arranged. As shown in FIG. 1A, the blades 20 arranged in two rows have a surface in which the terminals in one row of blades are arranged and a surface in which the terminals in the other blade are arranged. They are opposed to each other in the connector thickness direction.

  The housing 10 is formed with a blade accommodating portion as two spaces extending in the connector width direction and penetrating the housing 10 in the connector height direction. As shown in FIG. 2A, the space is partitioned by the partition wall 11 at the center position in the connector thickness direction, so that a plurality of blades 20 can be accommodated in the housing 10. Two accommodating portions 12A and 12B, which are spaces, are formed. In the present embodiment, for convenience of description, when it is not necessary to distinguish between the accommodating portions 12A and 12B, these are collectively referred to as “accommodating portion 12”.

  The partition wall 11 is formed with a plurality of protrusions 11A extending in the connector height direction and supporting the blade 20 on both sides thereof with an interval in the connector width direction (see FIG. 7). The protrusion 11A has a width dimension in the connector width direction that gradually decreases from the top to the bottom. As will be described later, the protruding portion 11A is press-fitted into a holding groove 22C, which will be described later, of the blade 20 inserted into the housing portion 12 from below to hold the blade 20.

  As shown in FIG. 1 (A), the housing 10 is formed with end wall portions 13 extending upward from the upper edge portion at both side positions in the connector thickness direction at both ends in the connector width direction. A guide portion 14 that extends upward at the middle portion in the connector thickness direction is formed integrally with the end wall portion 13 at the upper edge portion of the housing 10. The guide portion 14 has a substantially rectangular parallelepiped outer shape, and an upper end portion projects upward from the end wall portion 13 and has a tapered shape. The tapered shape is formed as guiding slopes 14A and 14B for guiding a mating connector 2 (see FIG. 1B), which will be described later, toward the fitting proper position when the connector is fitted. The guiding slope 14A is inclined in the connector width direction, and the guiding slope 14B is inclined in the connector thickness direction. That is, the guiding slope 14A invites the mating connector 2 toward the mating normal position in the connector width direction, and the guiding slope 14B lures the mating connector toward the mating normal position in the connector thickness direction. It has become.

  As shown in FIG. 1A, a groove 15 is formed at a position corresponding to the terminal 21 at the lower edge portion extending in the connector width direction of the housing 10, and is formed at the lower end portion of the terminal 21. The connecting portions 21A-1 and 21B-1 described later are allowed to extend out of the housing. In addition, slit-like attachment holes 16 extending in the connector height direction for the fixing member 30 to be press-fitted and attached are formed on the lower surface of the housing 10 at both ends in the connector width direction (see FIG. 7).

  FIG. 3A is a perspective view of the blade 20 of the connector 1 as viewed from the side where the terminals are arranged. FIG. 3B is a perspective view of the blade 20 as viewed from the side where the ground plate 23 is attached. In the blade 20, a plurality of terminals 21 integrally formed with the base material 22 are arranged on one plate surface of a synthetic resin plate-like base material 22 so as to cover the arrangement range of the plurality of terminals 21. Further, a ground plate 23 is attached to the other plate surface of the base material 22. The terminals 21 extend in the connector height direction in parallel with each other at a predetermined interval. In this embodiment, the terminals 21 are arranged at equal intervals, and impedance matching is achieved in all the terminals 21 by setting the terminals 21 to a predetermined size.

  A plurality of terminals 21 of each blade 20 is composed of a signal terminal 21A and a ground terminal 21B. In this embodiment, as shown in FIG. 3B, among the plurality of terminals 21 in each blade 20 The terminals 21 at both ends and the center position are used as the ground terminals 21B, and the other terminals are used as the signal terminals 21A. In the present embodiment, for convenience of description, when it is not necessary to distinguish the signal terminal 21A and the ground terminal 21B, these terminals are collectively referred to simply as “terminal 21”.

The terminal 21 has a lower end protruding from the lower end edge of the substrate 22. This protruding portion is bent at a substantially right angle toward the outside of the connector in the thickness direction of the connector, and is connected to a circuit board by connection portions 21A-1 (connection portions of the signal terminal 21A), 21B-1 ( The connection portion of the ground terminal 21B is formed (see FIG. 2A). Further, as shown in FIG. 3A, the upper end portion of the terminal 21 is a straight contact portion 21A-2 (contact portion of the signal terminal 21A) that contacts the terminal of the mating connector in the connector fitting state. ), 21B-2 (ground terminal 21)
B contact portion) (see also FIG. 2A).

  As shown in FIG. 3A, the contact portions 21 </ b> A- 2 and 21 </ b> B- 2 of the plurality of terminals 21 are exposed from the plate surface at the upper part of the blade 20. 3B, the connection portions 21A-1 and 21B-1 protrude from the lower end of the base material 22. As shown in FIG. A portion extending in a straight line between the connection portions 21A-1, 21B-1 and the contact portions 21A-2, 21B-2 is embedded in the base material 22, and the terminal longitudinal direction (see FIG. Holes 22A and 22B penetrating the base material 22 in the plate thickness direction are provided at two locations in the vertical direction of 3 (A), and the terminals 21 are exposed in the holes 22A and 22B. The holes 22A and 22B are formed in order to hold the plurality of terminals 21 in a state where they are positioned by the mold when the blade 20 is manufactured.

  As shown in FIG. 3A, the base material 22 is formed with a holding groove 22C extending in the terminal longitudinal direction at the center in the terminal arrangement direction. When the blade 20 is inserted into the housing portion 12 of the housing 10, the holding groove 22C is pressed into the protruding portion 11A provided on the partition wall portion 11 of the housing 10, and is held by the protruding portion 11A. (See FIG. 7). The holding groove 22C is formed so that the width dimension in the terminal arrangement direction gradually decreases downward corresponding to the width of the protruding portion 11A. Further, holding protrusions 22C-1 and 22C-2 protruding in directions approaching each other are formed on the upper end side and the lower end side of the holding groove 22C on a pair of inner side surfaces of the holding groove 22C extending in parallel with each other in the terminal longitudinal direction. Is formed.

  As shown in FIG. 3B, a metal ground plate 23 covering the entire other plate surface is attached to the entire other plate surface of the base material 22. In the present embodiment, in the blade 20, the distance between the terminal 21 and the ground plate 23 is larger than the distance between the terminals 21. By arranging the plurality of terminals 21 and the ground plate 23 in this way, the ground plate 23 does not affect the impedance of each terminal 21 adjusted by the distance between the terminals 21.

  The ground plate 23 is an arm in which the ground plate 23 is cut and raised on the base material 22 side at three places, an upper portion, a middle portion, and a lower portion in the height direction (terminal longitudinal direction) of both end portions and the central portion in the terminal arrangement direction. A ground piece 23A is formed. In the present embodiment, the ground terminal 21B is positioned corresponding to the ground piece 23A in the terminal arrangement direction. As shown in FIG. 3B, the ground piece 23A formed in the upper part extends downward, and the ground piece 23A formed in the middle part and the lower part extends upward.

  4A is a cross-sectional view at the position of the ground terminals 21B in the terminal arrangement direction of FIG. 3B (the position of the alternate long and short dash line IVA in FIG. 3B). 4B is a cross-sectional view at the position of the signal terminal 21A in the terminal arrangement direction of FIG. 3B (the position of the alternate long and short dash line IVB in FIG. 3B). As shown in FIG. 4A, all the ground pieces 23A are bent so that the tips thereof are convexly curved toward the plate surface of the base material 22, and the bent portions are ground terminals. It is formed as a contact portion 23A-1 for contacting 21B. The ground piece 23 </ b> A is in elastic contact with the ground terminal 21 </ b> B at the contact portion 23 </ b> A- 1, whereby a ground effect is obtained in the connector 1 including the blade 20.

  As shown in FIG. 3B, the ground plate 23 has mounting holes 23B for attaching the ground plate 23 to the plate surface of the base member 22 between the ground pieces 23A in the terminal longitudinal direction. Is formed. The mounting hole 23B has a substantially rectangular shape extending in the terminal longitudinal direction, and the width of the upper part is slightly narrower than the width of the lower part.

FIG. 5 is a perspective view showing the blade 20 shown in FIG. 3B with the ground plate 23 removed. As shown in FIG. 5, the surface of the base material 22 on which the ground plate 23 is attached (hereinafter referred to as “attached surface”) is located at a position corresponding to the ground piece 23 </ b> A of the ground plate 23. A recess 22D is formed to allow the entry of. As shown in FIG. 5, each recess 22 </ b> D is formed with a slope 22 </ b> D- 1 that slopes in accordance with the slope of the ground piece 23 </ b> A to which the recess 22 </ b> D corresponds.

  Further, a projection 22E having a quadrangular cross section is formed on the mounting surface at a position corresponding to the mounting hole 23B of the ground plate 23. The protrusion 22E has a width dimension in the terminal arrangement direction that is slightly smaller than the width dimension of the substantially lower half of the mounting hole 23B of the ground plate 23 and slightly larger than the width dimension of the substantially upper half in the same direction. It has become. A procedure for attaching the ground plate 23 to the substrate 22 will be described later.

  Hereinafter, a procedure for making the blade 20 and press-fitting the blade 20 into the housing 10 will be described. First, a plurality of straight terminals 21 that are not bent in the plate thickness direction, that is, where the connection portions 21A-1 and 21B-1 are not yet formed, are arranged at predetermined intervals in the molding die. Then, the plurality of terminals 21 and the synthetic resin base material 22 are integrally formed by pouring molten resin into the mold. At this time, in order to project one end of the terminal 21 from one end side of the base material 22, the terminal 21 is disposed so that one end thereof projects outward from the mold. Next, the end portions of all the terminals 21 protruding from one end of the base material 22 are bent at the same time to form connection portions 21A-1 and 21B-1. Thereby, the integral molding of the terminal 21 and the base material 22 as shown in FIG. 5 is made.

  Next, the protrusion 22E of the base material 22 is inserted into a substantially lower half of the mounting hole 23B of the ground plate 23, that is, a portion formed with a width slightly larger than the width of the protrusion 22E, and the ground plate 23 is inserted. The substrate 22 is brought into close contact with the plate surface. Then, the ground 23 is used as a base material so that the protruding portion 22E is press-fitted in the longitudinal direction of the terminal into a substantially upper half of the mounting hole 23B, that is, a portion formed with a width slightly smaller than the width of the protruding portion 22E. It slides downward, maintaining the state closely_contact | adhered to the board surface of 22. FIG. In this manner, the inner edge of the upper half of the mounting hole 23B bites into the outer edge of the protrusion 22E by press-fitting the protrusion 22E. As a result, the ground plate 23 is attached to the base material 22, and the manufacture of the blade 20 is completed.

  Next, as shown in FIG. 6, the blade 20 made in this way is positioned so that the plate surface to which the ground plate 23 is attached faces outward of the housing 10 in the connector thickness direction. It press-fits into the accommodating part 12 through the lower opening part of the accommodating part 12 of the housing 10 from the edge side where 21A-2 and 21B-2 are formed (arrow P). At that time, the protrusion 11A formed on the partition wall 11 of the housing 10 is press-fitted into the holding groove 22C of the blade 20 in the terminal longitudinal direction, that is, the connector height direction. The protrusion 11A is pinched and held in the terminal arrangement direction, that is, the connector width direction by the holding protrusions 22C-1 and 22C-2 formed in the holding groove 22C. In this way, the blade 20 is held by the housing 10.

  As shown in FIG. 1 (A) and FIG. 2 (A), the press-fitted blade 20 penetrates the accommodating portion 12, and the upper portion of the blade 20, that is, the contact portions 21A-2 and 21B-2 are located. The protruding portion projects upward from the upper edge of the housing 10. In the present embodiment, the upper end portions of all the blades 20 are press-fitted until they are substantially in the same position as the upper end portions of the end wall portions 13 in the connector height direction. As shown in FIG. 2A, a receiving space 17 is formed between the upper portions of the blades 20 to receive a central wall portion 42 of the mating connector 2 described later in the connector fitting state.

FIG. 7 is a sectional view taken along line VII-VII in FIG. As shown in FIG. 7, the blade 20 is held by the protrusion 11 </ b> A of the housing 10 at two positions in the terminal longitudinal direction, that is, at the positions of the holding protrusions 22 </ b> C- 1 and 22 </ b> C- 2. A gap is formed between the protrusion 11A and the holding groove 22C at positions other than the holding protrusions 22C-1 and 22C-2 in the terminal longitudinal direction. Further, a gap is also formed between the outer edge portion of the blade 20 and the inner edge portion of the accommodating portion 12.

  In a state where the blade 20 is held in the housing portion 12, the connection portions 21A-1 and 21B-1 of the terminal 21 protrude from the respective groove portions 15 to the outside of the connector 1, as shown in FIG. . The connector 21 and the circuit board are electrically connected by soldering the connecting part 21A to a corresponding circuit part (not shown) of the circuit board.

  As shown in FIG. 1A, a fixing member 30 for fixing the connector 1 on the circuit board is provided on the lower surface of the housing 10 at both ends in the connector width direction. The fixing member 30 is made of a metal plate, and is attached to the housing 10 by press-fitting a part of the fixing member 30 into the attachment hole 16 (see FIG. 7) of the housing 10. Two fixing members 30 are provided at each end of the housing 10 in the connector width direction, and the portions protruding downward from the mounting hole 16 at each end are separated from each other in the connector thickness direction. It extends. The lower edge portion of the fixing member 30 is solder-connected to the circuit board, whereby the connector 1 is fixed on the circuit board.

FIG. 1B is a perspective view of the mating connector 2 fitted and connected to the connector 1 according to the present embodiment as viewed from below. FIG. 2B is a cross-sectional view taken along a dashed line IIB in FIG. The mating connector 2 includes a synthetic resin housing 40 having a substantially rectangular parallelepiped outer shape, a plurality of terminals 50 arranged and held in the longitudinal direction by the housing 40, and a metal for fixing the mating connector 2 on a circuit board. And a plurality of fixing members 60.

  As is often seen in FIG. 2B, the housing 40 is formed with a receiving space 41 for receiving the upper portion of the blade 20 of the connector 1 when the connector is fitted. A central wall portion 42 having an island shape in the cross section of FIG. 2B is formed so as to extend over almost the entire area of the receiving space 41 in the width direction of the housing 40, that is, in the connector width direction. ing. Therefore, the receiving space 41 is formed between the central wall portion 42 and the peripheral wall of the housing 40 so as to surround the central wall portion 42. The receiving space 41 is formed in the lower half of the housing 40, as can be seen in FIG. A terminal holding groove 43 for holding the terminal 50 is formed in the upper half of the housing 40. The terminal holding groove 43 penetrates in the vertical direction and communicates with the receiving space 41. As will be described later, the terminal 50 is held by the inner surface of the terminal holding groove 43.

  As shown in FIG. 1B, a terminal receiving groove 42A, which will be described later, is formed on the side wall surface of the central wall portion 42 at a position corresponding to the terminal 50 in the connector width direction. It extends in the vertical direction (connector height direction) within the range (see also FIG. 2B).

  As is often seen in FIG. 2B, the terminal 50 has a substantially inverted L shape in which the upper end side of the straight metal piece is bent at a substantially right angle in the plate thickness direction. The upper end portion of the terminal 50 bent and extended in a direction perpendicular to both the connector width direction and the connector height direction (referred to as “connector thickness direction” for the mating connector 2) is on a circuit board (not shown). It is formed as a connection portion 51 connected to the formed corresponding circuit portion. Further, the lower end portion of the terminal 50 is bent so as to be convexly curved in the same direction as the direction in which the connecting portion 51 extends, and the convex curved portion is in contact with the terminal 21 of the connector 1 in the receiving space 41. The contact portion 52 is formed.

Among the plurality of terminals 50, a terminal at a position corresponding to the signal terminal 21 </ b> A of the connector 1 in the connector fitting state is used as a signal terminal, and a terminal at a position corresponding to the ground terminal 21 </ b> B of the connector 1 is used as a ground terminal. As will be described later, in the connector fitting state, the terminal 50 in contact with the terminal 21 of the connector 1 is elastically deformed toward the central wall portion 42 side, and a part of the terminal 50 is received in the terminal receiving groove 42A. ing.

  The terminal 50 is press-fitted downward from the contact portion 52 side through the terminal holding groove 43 of the housing 40, and both side edges of the upper portion of the portion extending in the connector height direction are clamped by the inner surface of the terminal holding groove 43. Is retained. 2B, the contact part 52 is located in the receiving space 41, and the connection part 51 extends from the upper opening of the terminal holding groove 43 to the outside of the mating connector 2 in the connector thickness direction. Yes.

  As shown in FIG. 1 (B), the lower ends of both end portions in the connector width direction of the housing 40 are holes that open downward to receive the guide portions 14 of the connector 1 when connector fitting is performed. A guided portion 44 is provided. At the opening edge of the guided portion 44, a guided inclined surface 44A inclined in the connector width direction and a guided inclined surface 44B inclined in the connector thickness direction are formed. Even when the relative position of the connector 1 and the mating connector 2 is slightly deviated from the fitting normal position in the connector width direction or the connector thickness direction when the connector is fitted, the guided portion 44 has the guided inclined surface 44A as a connector. 1 is brought into contact with the guiding inclined surface 14A and guided toward the fitting normal position in the connector width direction, and the induced inclined surface 44B is brought into contact with the guiding inclined surface 14B of the connector 1 and is fitted in the connector thickness direction. Guided towards position. In this way, the guide portion 14 can easily enter the guided portion 44, and the relative position between the connector 1 and the connector 2 is brought to the fitting proper position.

  Fixing members 60 for fixing the connector 2 on the circuit board are provided on the upper surface of the housing 40 at both ends in the connector width direction. The fixing member 60 is made of a metal plate, and a part of the fixing member 60 is press-fitted into a slit-like attachment hole (not shown) formed in the upper surface of the housing 10 and extending in the connector height direction. Thus, the housing 40 is attached. Two fixing members 60 are provided at each end of the housing 40 in the connector width direction, and at each end, portions protruding downward from the mounting hole are directions away from each other in the connector thickness direction. It extends to. The fixing member 60 is solder-connected to the circuit board at the upper edge portion, whereby the connector 2 is fixed on the circuit board.

  Next, the fitting operation between the connector 1 and the mating connector 2 will be described.

  When the mating connector 2 is fitted from above the connector 1, the center wall portion 42 of the mating connector 2 and the contact portion 52 side portion of the terminal 50 enter from above into the receiving space 17 of the connector 1. The upper end portions of the two rows of blades 20, that is, the portions where the contact portions 21A-2 and 21B-2 of the terminals 21 are provided enter the receiving space 41 from below.

  When the positions of the connector 1 and the mating connector 2 are slightly shifted in the connector width direction or the connector thickness direction, the guided slope 44A of the mating connector 2 is guided in the connector width direction by the guiding slope 14A of the connector 1, The induced inclined surface 44B of the mating connector 2 is guided in the connector thickness direction by the guiding inclined surface 14B of the connector 1, and the mating connector 2 is brought to a normal position for fitting with the connector 1.

When the contact portion 52 of the terminal 50 of the mating connector 2 enters the receiving space 17 of the connector 1, the contact portion 52 contacts the contact portions 21 </ b> A- 2 and 21 </ b> B- 2 of the blade 20 in the receiving space 17. The contact portion 52 is pushed inward in the connector thickness direction by the contact portions 21A-2 and 21B-2 and elastically displaced in the same direction, and is accommodated in the terminal accommodating groove 42A. Then, the lower surface of the central wall portion 42 of the mating connector 2 comes into contact with the upper surface of the partition wall portion 11 of the connector 1, and further intrusion of the central wall portion 42 is prevented, so that the connectors can be fitted together. Complete.

  In the present embodiment, since the blade 20 is formed by integrally molding a plurality of terminals 21 at equal intervals and a synthetic resin base material 22, the base material between the terminals 21 in the terminal arrangement direction is formed. The dimensions are the same. Further, since the resin is in close contact with the terminal, no air layer is formed between the base material 22 and the terminal 21. Therefore, the dielectric constant between the terminals is the same. As a result, impedance matching can be easily realized at all terminals.

  In the present embodiment, all the terminals 21 are divided into a plurality of sets, and each set of the terminals 21 is integrally formed with the base material 22 to make a blade having a small dimension in the terminal arrangement direction. Therefore, since the molds for manufacturing each blade 20 can be small, the molten resin sufficiently flows into the entire mold, and the molten resin easily flows between the terminals 21. As a result, it is possible to more reliably avoid the formation of an air layer between the terminals. As a result, impedance matching can be more reliably realized.

  By the way, when making a blade by integrally molding a plurality of arranged terminals and a base material, after forming the straight terminal and the base material integrally, the end portions of all the terminals protruding from the base material are formed. In many cases, the connection portion is formed by bending. At this time, when the connection portion is formed, the position where the imaginary line extending over all the terminals in the terminal arrangement direction intersects with the terminals is bent at the same time by the tool. However, due to an error in the relative position between the terminal and the tool, all the terminals are bent in a state where the imaginary line is inclined with respect to the terminal arrangement direction, and as a result, the bending position in the terminal longitudinal direction is May shift. In this case, since the positions of the connecting portions are not aligned between the terminals, it becomes difficult to sufficiently connect the connecting portions of all the terminals to the corresponding circuit portion on the circuit board, and the stability of the connection is ensured. become unable.

  If the above situation occurs when all the terminals and the base material are integrally molded to make one blade with a large dimension in the terminal arrangement direction, the dimension in the terminal arrangement direction is large, Since the displacement of the bending position between the terminals located on the one end side and the other end side in the same direction becomes large, the displacement of the position of the connecting portion in the terminal longitudinal direction also becomes large. Therefore, the connection between the connection portion and the corresponding circuit portion is likely to become more unstable.

  In this embodiment, the blade press-fitted into one connector is divided and formed in the connector width direction, that is, the terminal arrangement direction. Since one blade has a small dimension in the terminal arrangement direction, it is assumed that the connection portion is formed. Even if the bending position of the terminals located on the one end side and the other end side in the terminal arrangement direction is shifted due to the fact that the imaginary line is inclined, the size of each blade in the terminal arrangement direction is small, The deviation in each blade is small. Therefore, the connection between the connection portion and the corresponding circuit portion is less likely to become unstable.

  Further, in this embodiment, since a plurality of blades having a small dimension in the terminal arrangement direction are used as a set, the number of blades arranged in the terminal arrangement direction can be set for various housings having different dimensions in the terminal arrangement direction. By increasing / decreasing the value, it is possible to use the blade itself without changing the members and molds. As a result, an increase in the manufacturing cost of the connector can be suppressed.

In the present embodiment, the plurality of blades 20 are press-fitted into the housing portions 12A and 12B of the housing 10 from the upper edge side where the contact portions 21A-2 and 21B-2 of the blade 20 are provided. By doing so, even if the housing 10 is distorted and the dimensional accuracy in the terminal longitudinal direction at different positions in the terminal arrangement direction, that is, the connector width direction is not ensured, the blades 20 are press-fitted. By adjusting the amount, the positions of the terminal connecting portions 21A-1 and 21A-2 in the terminal longitudinal direction can be aligned over the entire connector width direction. As a result, the connection between all the terminals 21 and the corresponding circuit portion on the circuit board can be further stabilized.

  In the present embodiment, as described above, in the state where the blade 20 is press-fitted into the housing portion 12 of the housing 10, the blade 20 is held by the protrusion 11 </ b> A of the housing 10 by the holding protrusion 22 </ b> C− of the blade 20. The pressure is held only at the positions 1 and 22C-2. At other positions, the blade 20 and the accommodating portion 12 are not in contact with each other, and a gap is formed between them.

  As described above, the blade 20 is held and held by the holding protrusions 22C-1 and 22C-2 at the local portion, so that the contact area between the blade 20 and the inner surface of the housing portion 12 is reduced. Therefore, even if an inadvertent external force is applied to the housing 10 of the connector 1 disposed on the circuit board, the contact area, in other words, the stress transmission area is small, so that the external force is hardly transmitted to the blade 20, Most of the stress caused by the external force is transmitted from the housing 10 to the fixing member 30. As a result, stress is not easily transmitted to the connection portion between the connection portions 21A-1 and 21B-1 of the terminal 21 and the corresponding circuit portion of the circuit board, and a stable connection state can be maintained.

  In the present embodiment, a metal ground plate 23 is attached to the plate surface of the substrate 22 so as to cover the arrangement range of the terminals 21 arranged on one surface of the substrate 22, and is formed on the ground plate 23. The ground piece 23A is in elastic contact with the ground terminal 21B. Therefore, high-speed transmission is improved as compared with the case where the ground plate and the ground terminal are not in contact.

  In the present embodiment, the ground portion is formed as the ground terminal 21B which is a terminal member having the same shape as the signal terminal 21A. The solder connection between the connector terminal and the corresponding circuit portion on the circuit board is usually performed by heating the connector and the circuit board with the unmelted solder between the connector connection portion and the corresponding circuit portion (not shown). It is made by so-called reflow which is heated in

  If the ground portion is formed integrally with the ground plate as a leg portion extending from the lower end of the ground plate instead of the terminal member, the surface area of the ground plate integrated with the ground portion is determined by each signal terminal. Since it is much larger than the surface area, the amount of heat released from the surface of the ground plate during reflow is greater than the amount of heat released from the surface of the signal terminal. In other words, since the amount of heat released from the surface of the ground plate is large, the amount of heat supplied to the solder connection portion between the ground portion and the corresponding circuit portion is reduced, and the connection portion may not be sufficiently soldered. . Since a sufficient amount of heat is supplied to the connection portion between the signal terminal connection portion and the corresponding circuit portion having a small surface area, the solder connection is also sufficient, so that the stability of the connection state between the ground terminal and the signal terminal is improved. Large variations are likely to occur.

  In the present embodiment, since the ground terminal having the same shape as the signal terminal is provided, as compared with the case where the ground portion formed as a leg portion extending from the lower end of the ground plate is formed integrally with the ground plate, The surface area of the ground terminal as the ground portion is reduced, and a sufficient amount of heat is supplied to the connection portion between the connection portion of the ground terminal and the corresponding circuit portion, and the solder connection at the connection portion can be sufficiently performed.

In the present embodiment, the ground terminal and the signal terminal have the same surface area, and the heat radiation from the surface is also equal. Therefore, the amount of heat supplied is equal between the connection portion between the ground terminal and the corresponding circuit portion and the heat amount supplied to the connection portion between the signal terminal and the corresponding circuit portion. As a result, the same amount of heat is supplied to the connecting portion between the ground portion and the corresponding circuit portion, and the connecting portion between the signal terminal connecting portion and the corresponding circuit portion, and variations in connection stability can be eliminated.

  In the present embodiment, the housing is made of synthetic resin, but the material of the housing is not limited to this, and may be another electrical insulator. The housing may be made of metal, for example. In that case, it is necessary to provide an insulating layer in the housing in contact with the terminal and the ground plate. By making the housing made of metal, the ground effect can be improved.

  In the present embodiment, the blades are arranged in two rows in the connector thickness direction, but the number of rows is not limited to this, and may be one row or three or more rows.

  In the present embodiment, the case where two circuit boards whose plate surfaces extend in parallel with each other is electrically connected by fitting the connector 1 and the mating connector 2 is described. However, the positional relationship between the two circuit boards is not limited thereto. I can't. For example, the mating connector may be a right angle type, and two circuit boards whose plate surfaces extend at right angles may be electrically connected by fitting the two connectors.

  In the present embodiment, the plurality of terminals are arranged at regular intervals in the terminal arrangement direction, but the intervals between the terminals are not limited to regular intervals. In order to achieve impedance matching between the terminals, for example, the terminals are bent in a substantially crank shape within the terminal arrangement plane according to the thickness dimension (dimension in the blade facing direction) and width dimension (dimension in the terminal arrangement direction) of the terminals. Thus, the dimension between the terminals may be adjusted. Specifically, when the thickness dimension of the terminal is large, it is necessary to bend the terminal so that the dimension between the adjacent terminals is large. When the terminal width dimension is small, the dimension between the adjacent terminals is required. It is necessary to bend the terminal so as to be small.

  In the present embodiment, the housing holds and holds the blade at two locations in the longitudinal direction of the terminal, that is, at the position of the holding protrusion of the holding groove. Or three or more locations may be used.

DESCRIPTION OF SYMBOLS 1 Connector 21 Terminal 2 Mating connector 21A-1, 21B-1 Connection part 10 Housing (holding member) 22 Base material 12A, 12B Storage part 22C-1, 22C-2 Holding protrusion 20 Blade 23 Ground plate

Claims (3)

  In an electrical connector for connecting two circuit boards to each other, a plurality of terminals in which a plurality of terminals extending in parallel with each other at a predetermined interval on one plate surface of a plate-like base material of an electrical insulating material are integrally formed with the base material And a holding member that holds the blade group composed of the plurality of blades adjacent to each other in the terminal arrangement direction so as to be positioned on the same plane. The blade groups corresponding to each other are accommodated in accommodating portions partitioned by a partition wall having a wall surface parallel to the plate surface, and the partition portion includes a holding portion for holding each blade in the accommodating portion. Each of the blades is formed on the plate surface of the partition wall, and each of the blades has a holding portion that is press-fitted in the longitudinal direction by the holding portion and extends in the longitudinal direction. It is formed on the plate surface Electrical connector for a circuit board according to claim.   2. The circuit board electrical connector according to claim 1, wherein at least one of the holding member and the blade has a holding projection that holds the blade in a localized manner.   The circuit board electrical connector according to claim 1 or 2, wherein the blade has a metal ground plate attached to the other plate surface of the base so as to cover the arrangement range of the terminals. .

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