JP3948397B2 - connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connector structure suitable for high-speed signal transmission.
[0002]
[Prior art]
Conventionally, the following techniques have been proposed as typical techniques for high-speed transmission connectors.
[0003]
(A) A structure in which a ground plate is provided between rows of signal contacts (see, for example, Patent Document 1).
[0004]
(B) A structure in which pin contacts are arranged in a grid or zigzag pattern, and the signal contacts are surrounded by ground contacts by the pin arrangement (see, for example, Patent Document 2).
[0005]
(C) A structure in which the housing surface is grounded using plastic plating or the like (for example, see Patent Document 3).
[0006]
A connector according to an example of the prior art (Patent Document 1) will be described with reference to FIGS. The connector shown in FIGS. 5 to 6 is press-fitted into the connector main body 51 made of an insulator in which a plurality of contact holes 53 are formed in a plurality of rows at equal intervals, and the holes 53 of the connector main body 51. Contact 52. A metal plate 54 as a plate member made of a conductive member is provided between the rows of the holes 53 in the connector main body 51 and the outside thereof.
[0007]
More specifically, in the example shown in FIGS. 5 to 6, the plurality of contact holes 53 are formed in a lattice pattern in three rows, and the contacts 52 are press-fitted into the respective holes. Between each row, a metal plate 54 is inserted over the entire length. The metal plate 54 extends along the contacts 52 in a space between the plurality of contacts 52 exposed from the connector main body 51 and reaching the printed circuit board 55. The metal plate 54 is grounded via the printed board 55. The metal plate 54 is incorporated by insert molding when the connector body 51 is molded, but may be press-fitted after the connector body 51 is formed.
[0008]
FIG. 6 is a cross-sectional view taken along the line B-B of FIG. 5. The contact 52 is connected to the printed board 55, and the electrical signal is connected to the mating connector from the board 55 via the connector and the mating connector. Is transmitted to.
[0009]
As described above, in the example shown in FIGS. 5 to 6, as described above, the metal plate 54 is inserted between the longitudinal rows of the holes 53 for the contacts 52. It is possible to reliably reduce and obtain stable transmission characteristics with respect to high-speed signals.
[0010]
Further, since the metal plate 54 extends over the printed circuit board, it is possible to effectively prevent the crosstalk at the contact 52 portion particularly in the space from the connector main body 51 to the printed circuit board 55. There is an advantage that emission of a noise signal can be effectively prevented.
[0011]
Next, another example of the prior art (Patent Document 2) will be described.
[0012]
7A and 7B are perspective views showing a plug-side contact and a receptacle-side contact used in the connector according to Patent Document 2, respectively.
[0013]
In FIG. 7A, a plug-side connector contact (hereinafter referred to as a plug-side contact) 70 used for the connector in Patent Document 2 is such that a signal contact 61 and a ground contact 63 face each other. ing. On the other hand, in FIG. 7B, the receptacle-side connector contact (hereinafter referred to as the receptacle-side contact) 80 is separated from the upright signal contact 71 and both the flat surface portion and one side surface portion of the signal contact 71. A ground contact 73 having a U-shaped cross section is formed so as to face each other. That is, the ground contact 73 surrounds both the flat portions and one side surface portion of the signal contact 71.
[0014]
Next, a description will be given of a structure in which both the contacts 70 and 80 are incorporated in the insulator 65 and configured as a plug-side connector and a receptacle-side connector.
[0015]
8 is a partially broken perspective view showing the plug-side connector according to Patent Document 2, and FIG. 9 is a partially broken perspective view showing the receptacle-side connector of Patent Document 2. As shown in FIG.
[0016]
First, the configuration of the plug-side connector will be described. In FIG. 8, the plug-side connector 60 is formed by implanting a plurality of plug-side contacts 70 (61, 63) in an insulator 65. The insulator 65 has a rectangular bottom surface portion 65a and a side wall portion 65b erected around the bottom surface portion 65a. In the bottom surface portion 65a, contact insertion holes 65c are formed at predetermined intervals in the longitudinal direction of the connector. Further, an upright portion 65d is provided beside the insertion hole 65c so as to sandwich the insertion hole 65c in the connector longitudinal direction. An engaging recess 65f is formed on the surface of each standing portion 65d on the width direction side of the connector. In these engagement recesses 65f, signal contacts 61 and ground contacts 63 extending from the insertion holes 65c into the insulator 65 are fitted back to back with the upright portions 65d interposed therebetween, Each contact 61, 63 is in a state of being erected and held by an erected portion 65d.
[0017]
Next, the configuration of the receptacle-side connector in Patent Document 2 will be described.
[0018]
In FIG. 9, the receptacle-side connector 90 has a plurality of receptacle-side contacts 80 implanted in an insulator 75. A groove portion 77 extending in the longitudinal direction and opening on the upper surface side is formed in the center portion in the width direction of the insulator 75. In the groove 77, a signal contact 71 and a ground contact 73 are erected and held while maintaining the positional relationship shown in FIG.
[0019]
The insulator 75 of the receptacle-side connector 90 is fitted in a space surrounded by the side wall 65b of the plug-side connector 60 shown in FIG.
[0020]
Next, a fitting connection state between the plug-side connector 60 and the receptacle-side connector 90 will be described.
[0021]
FIG. 10 is a cross-sectional view showing a fitting state of the plug-side connector and the receptacle-side connector.
[0022]
In FIG. 10, when the receptacle-side connector 90 is fitted into the space defined by the insulator side wall portion 65 b of the plug-side connector 60, the signal contact 61 of the plug-side connector 60 becomes the signal contact 71 of the receptacle-side connector 90. To touch.
[0023]
Similarly, the ground contact 63 of the plug-side connector 60 is also in contact with one surface side of the pair of opposing surfaces of the ground contact 73 of the receptacle-side connector 90. That is, the signal contacts 61 and 71 of both connectors are surrounded on three sides by the ground contact 73 of the receptacle-side connector 90. Therefore, an optimum characteristic impedance can be obtained by changing (adjusting) the distance between the signal contact 61 and the ground contact 75.
[0024]
Further, as can be seen from FIG. 10, between the adjacent signal contacts 71 is shielded by the ground contact 73, and the occurrence of crosstalk can be suppressed.
[0025]
Furthermore, yet another example of the prior art (Patent Document 3) will be described.
[0026]
FIG. 11 is a perspective view of a motherboard-side connector according to Patent Document 3. As shown in FIG. A part of the housing is a cut surface. The motherboard-side connector 101 includes a housing 102 having a substantially U-shaped cross section, a plurality of signal contacts 103 held at a predetermined interval in the housing 102, and a fixed interval between the signal contacts 103. The ground contact 104 is provided. The terminal portion 103a of the motherboard connector 101 is connected to a motherboard (not shown).
[0027]
12 is a perspective view showing an assembled state of the daughter board side connector according to Patent Document 3, FIG. 13 is an exploded perspective view thereof, and FIG. 14 is a sectional view taken along arrow XIV-XIV in FIG.
[0028]
The daughter board side connector (connector) 105 includes a housing 110, a unit insulator (insulator) 120, a signal contact 130, a ground plate (ground contact) 140, and a shield plate (conductive terminal) 150.
[0029]
The housing 110 has a substantially rectangular parallelepiped shape and is formed of a thermoplastic resin. The housing 110 has a signal contact holding hole 111 for holding a part of the signal contact 130, a ground plate holding groove 112 for holding a part of the ground plate 140, and a shield plate holding for holding a part of the shield plate 150. Holes 113 are respectively formed.
[0030]
The signal contact holding holes 111 are arranged in a lattice shape so as to face the signal contacts 103 of the motherboard-side connector 101.
[0031]
The ground plate holding groove 112 is disposed so as to face the ground contact 104 of the motherboard-side connector 101. The ground plate holding groove 112 is formed with a slit 14 extending left or right (width direction).
[0032]
The unit insulator 120 has a plate shape, and the unit insulator 120 holds a plurality of signal contacts 130 having different sizes. A contact portion 131 and a terminal portion 132 of a signal contact 130, which will be described later, are exposed to the outside from the unit insulator 120.
[0033]
In the unit insulator 20, a plurality of slits 121 are formed in the signal contact 130. The slit 121 penetrates in the thickness direction of the unit insulator 20 (see FIG. 14).
[0034]
Further, convex portions 122 and 123 are formed on the upper surface 120a and the rear surface 120b of the unit insulator 120, respectively.
[0035]
Further, plastic plating (conductive layer) 125 is applied to the outer wall surface of the unit insulator 120 and the inner wall surface of the slit 121. This plastic plating 125 functions as a ground.
[0036]
The ground plate 140 is formed by stamping a metal plate with a press, processing the surface, and bending the metal plate.
[0037]
The ground plate 140 includes a base portion 141, a first press-fit portion 142, a second press-fit portion 143, and a contact portion 144 that can contact the ground contact 103 of the motherboard connector 101. The press-fit portions 142 and 143 and the contact portion 144 are bent at a substantially right angle with respect to the base portion 141. The contact portion 144 can be elastically deformed.
[0038]
The shield plate 150 has an L-shaped cross section. This shield plate 150 is manufactured by punching a metal plate with a press and subjecting it to a surface treatment, followed by bending.
[0039]
A plurality of holes 151 for fitting the convex portions 122 of the unit insulator 120 are formed in one side of the shield plate 150, and a plurality of terminal portions 152 inserted into through holes of a daughter board (not shown). Are formed respectively.
[0040]
On the other side of the shield plate 150, a plurality of holes 153 for fitting the convex portions 123 of the unit insulator 120 are formed, and a plurality of press-fit portions 154 to be press-fitted into the shield plate holding holes 113 of the housing 110. Is formed.
[0041]
The terminal portion 152 is a compliant terminal so as to cope with variations in through-hole diameter. The press-fit portion 154 has a press-fit projection 155 for preventing the shield plate 150 from easily coming out of the shield plate holding hole 113.
[0042]
The signal contact 130 is formed with a carrier (not shown) by punching a metal plate with a press. The signal contact 130 includes a plurality of terminal portions 132 inserted into through holes of a daughter board (not shown), a contact portion 131 that contacts the signal contact 3 of the motherboard-side connector 1, a terminal portion 132, and the contact portion 131. It is composed of an L-shaped intermediate portion (not shown) to be connected.
[0043]
The terminal portion 132 is a compliant terminal so as to cope with variations in through-hole diameter.
[0044]
Insert molding is performed with the carrier attached, and the carrier is cut after the insert molding. For this reason, the signal contacts 130 are reliably arranged at a constant interval.
[0045]
When assembling the daughter board side connector 105 having the above-described configuration, first, the first press-fit portion 142 of the ground plate 140 is press-fitted into the slit 121 of the unit insulator 120. At this time, the ground plate 140 contacts the plastic plating 125 of the unit insulator 120.
[0046]
Thereafter, a predetermined number (for example, six) of unit insulators 120 incorporating the ground plate 140 are stacked.
[0047]
Next, the convex portion 122 of the unit insulator 120 is fitted into the hole 151 of the shield plate 150, and the convex portion 123 of the unit insulator 120 is fitted into the hole 153 of the shield plate 150, so that the plurality of unit insulators 120 are joined to the shield plate. 150. As a result, the plurality of unit insulators 120 are positioned by the shield plate 150. At this time, the plastic plating 125 of the unit insulator 120 contacts the shield plate 150.
[0048]
Next, the press-fit portion 154 of the shield plate 150 is press-fitted into the shield plate holding hole 113 of the housing 110, and at the same time, the contact portion 131 of the signal contact 130 and the contact portion 144 of the ground plate 140 are inserted into the signal contact holding hole 111 and the slit of the housing 110. 114 respectively. At this time, the press-fit portions 142 and 143 of the ground plate 140 are press-fitted into the slit 114.
[0049]
As a result, the unit insulator 120 and the shield plate 150 are fixed to the housing 110.
[0050]
When the daughter board-side connector 105 assembled as described above is fitted to the motherboard-side connector 101, the contact portion 131 contacts the signal contact 103 of the motherboard-side connector 101, and the two circuit boards are electrically connected. Signals can be exchanged via the connectors 101 and 105.
[0051]
Further, when the daughter board side connector 105 is fitted to the motherboard side connector 101, the contact portion 144 contacts the ground contact 104 of the motherboard side connector 101, and a common ground line is formed between the two circuit boards.
[0052]
[Patent Document 1]
JP-A-5-234642
[0053]
[Patent Document 2]
Utility Model Registration No. 2597637
[0054]
[Patent Document 3]
JP 2001-217052 A
[0055]
[Problems to be solved by the invention]
However, in the connector for high-speed transmission according to the above (a) and (b), there is a gap between the grounds at a relatively close distance from the signal, or the ground contact surrounding the signal (contact) is a separate part. Depending on the voltage, the potential may be different, the effectiveness of the ground as the reference potential is weak, and this may cause crosstalk or impedance mismatch.
[0056]
On the other hand, in the connector for high-speed transmission according to the above (c), in order to avoid the adverse effects of heat and friction, it is necessary to provide a connection terminal (or contact terminal) separately in the mounting part or the fitting part, There is a possibility of cost increase due to an increase in the number of parts and a decrease in ground effect due to separate grounds.
[0057]
Therefore, it is necessary for the high-speed transmission connector to have a structure close to a complete shield structure and easy to achieve impedance matching by a low-cost manufacturing method without taking up much space and increasing the number of parts.
[0058]
Also, when using ultra-high-speed signals, it is unlikely to be used in applications where the number of signals is too large, but if it takes up too much space to form a shield structure, today's connectors will be smaller and lighter Going backwards, it could drop market prices.
[0059]
Therefore, in order not to make the size of the connector too large, the size of the ground surrounding the signal is limited, so that it depends on the thickness of the signal contact, the plate width, or the dielectric material.
[0060]
However, the dielectric material is not very flexible when it is mounted on a substrate because of a thermal problem. Further, the plate width of the signal contact cannot be reduced so much due to the problem of contact reliability. Therefore, it is necessary to propose a structure that can provide a mechanically and electrically stable connection even if the thickness of the contact or the like is reduced.
[0061]
Therefore, one technical problem of the present invention is a single-plate ground in which signal lines are continuous for each signal element, and the direction of adjacent signals and signal pairs is almost completely shielded. It is an object of the present invention to provide a connector that can easily exert its effect and can further reduce crosstalk.
[0062]
Another technical problem of the present invention is to provide a connector having a contact that maintains strength as a pin contact and can easily manage impedance even when the plate thickness of the contact is reduced.
[0063]
In addition, another technical problem of the present invention is that the contact width can be easily set by making by stamping or etching by pressing, and a hole is opened in the insulator at the time of molding, so that it can be applied to sections having different dielectric constants. It is to provide a connector that can be easily handled.
[0064]
Another technical problem of the present invention is that it can be easily processed by a press or the like, is easy to process such as providing a press-fitting piece or a dowel, is low in cost, and is easy to position and hold. It is an object of the present invention to provide a connector having a contact capable of producing an electrical performance close to a surface ground.
[0065]
[Means for Solving the Problems]
According to the present invention, in the connector used by being mounted on a substrate, the connector includes a signal contact, a ground contact, and an insulator for holding and fixing the signal contact, and the signal contact is formed in a substantially L shape, A contact portion connected to the mating connector on one side of the L shape, a terminal portion connected to the substrate on the other side of the L shape, and a substrate parallel running portion that is wider than the terminal portion and parallel to the substrate and spaced apart by a predetermined distance The ground contact is formed in a substantially U shape, a contact portion connected to the other side at the bottom of the U shape, a pair of terminal portions connected to the substrate on the open side of the U shape, A pair of press-fitting parts press-fitted and held in the insulator on both sides of the U-shaped bottom part, and a pair of positioning parts for positioning the ground contact on the U-shaped open side With The pair of press-fitting portions are positioned in the width direction of the insulator, which is the pitch direction of the contacts, and the pair of positioning portions are positioned in the thickness direction of the insulator perpendicular to the width direction of the insulator, Two pairs of signal contacts are arranged in the U-shape of the ground contact, Between the pair of terminal portions of the ground contact A pair of A connector characterized in that the terminal portion of the signal contact is provided.
[0067]
Also, according to the present invention, Writing A plug connector characterized by comprising a connector is obtained.
[0068]
Moreover, according to this invention, the receptacle connector characterized by comprising the said connector is obtained.
[0069]
According to the present invention, there is provided a connector device including a pair of plug connectors and receptacle connectors for fitting the connectors to each other, wherein one signal contact of the pair of connectors is connected to the other during the fitting. The contact portion is provided with a spring property so as to be in contact with the signal contact of the connector, and one ground contact of the pair of connectors is disposed on the contact portion so as to be in contact with the ground contact of the other connector. With springiness In addition, the ground contact is provided with a pair of contact portions so as to correspond to the pair of signal contacts. The connector device characterized by this can be obtained.
[0070]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0071]
FIG. 1 is a view showing a receptacle connector of a high-speed transmission connector according to an embodiment of the present invention, where (a) is a front view, (b) is a plan view, (c) is a rear view, and (d) is a side view. It is.
[0072]
2A is an exploded perspective view of the receptacle connector of FIG. 1, and FIG. 2B is a partial cross-sectional perspective view of the ground contact of FIG. 2A.
[0073]
Referring to FIGS. 1 and 2, the receptacle connector 10 includes an insulator 3, a signal contact 1 press-fitted into the insulator 3, and a ground contact 2 provided so as to surround the periphery thereof.
[0074]
As best shown in FIG. 2 (a), the signal contact 1 has an L-shape formed by stamping from one sheet and bending press processing, and has press-fit portions 1a and 1a protruding in the width direction. The support portion 1b, the contact portion 1c having a spring property formed so as to form a mountain shape at the tip of the support portion 1b, and the rear end of the support portion 1b are bent so as to form an L shape upward. The board parallel portion 1e and the mounting terminal portion 1d extending from the tip bent slightly rearward from the board parallel portion 1e to be thinner than the tip and extend upward. The signal contacts 1 are provided in two rows, one above the other, side by side in the width direction of the insulator 3.
[0075]
The ground contact 2 is formed of a substantially U-shaped (U-shaped) metal plate formed by bending and punching a single U-shaped single plate, and has a notch and a chevron shape. A bottom surface portion 2b having a contact portion 2c having a pair of spring properties provided side by side in the width direction by bending and two side surface portions 2g are provided. A press-fit portion 2a is formed integrally with the bottom surface portion together with the formation of the side hole portion 2d. When the left and right side surface portions 2g are bent and raised, the press-fit portions 2a and 2a are formed outward from the hole portion 2d. However, it protrudes symmetrically on the left and right sides. The press-fit portions 2a and 2a contribute to fixing the ground contact 2 to the insulator 3 and positioning the insulator 3 in the width direction. Further, projecting portions 2h and 2h for positioning in the thickness direction of the insulator when pressed into the insulator 3 are formed so as to project from the upper surfaces of the side surface portions 2g facing each other. A stepped step portion 2i is provided further rearward of the projecting portions 2h, 2h, and a terminal portion 2j for mounting on the substrate extends upward along the rear end. The ground contact 2 is press-fitted into the insulator 3 so as to surround the pair of signal contacts 1 and 1. The ground contact 2 can be formed not only by pressing but also by etching or the like.
[0076]
Further, the insulator 3 includes projecting portions 12 and 12 for fitting guide projecting on both sides of the front side, and projecting pieces 11 provided on both sides of the rear end of the insulator 3. The rear end surface of the insulator 3 is provided with a wide groove 7a for accommodating the mounting terminal portions 1d and 2j and narrow grooves 6 provided on both sides thereof. A narrower groove 7b extends forward from the wide groove 7a. The narrow groove 7b is provided so as to penetrate to the fitting portion 5 described below.
[0077]
The fitting part 5 extended in the front-back direction of the insulator 3 is provided in two steps symmetrically up and down and arranged in the width direction. A signal contact accommodating portion 8 is further provided in the fitting portion 5.
[0078]
Around the signal contact accommodating portion 8 of the fitting portion 5, a ground contact accommodating portion 5 a having a U-shaped hole is provided so that the ground contact 2 can be accommodated. The ground contact 2 is press-fitted into the ground contact accommodating portion 5a. At that time, the contact portion 2c of the ground contact 2 is moved upward and downward from the groove near the center in the vertical direction of the ground contact accommodating portion 5a, that is, the contact portion 2c of the ground contact 2 is upward from the upper groove, respectively. The contact portions 2c of the lower ground contact 2 are mounted so as to protrude downward.
[0079]
Further, the signal contact accommodating portion 8 is provided with through grooves 8a and 8a provided in the front-rear direction and a through hole 8b penetrating backward from the end of the through groove 8a. The signal contact 1 is press-fitted into the through hole 8b, and the signal contact 1 is press-fitted so that the contact portion 1c of the signal contact 1 protrudes from the through groove 8a in the height direction.
[0080]
Therefore, the ground contact 2 is provided in the insulator 3 so as to surround the pair of signal contacts 1, 1 constituting one signal line, and the pair of signal contacts 1, 1 adjacent to each other is a pair of signal contacts. The contacts 1 and 1 are separated from each other by the ground contacts 2 in the vertical and horizontal directions and shielded from each other.
[0081]
3A and 3B are diagrams showing a plug connector of the high-speed transmission connector according to the embodiment of the present invention that fits into the receptacle connector of FIG. 1, wherein FIG. 3A is a front view, FIG. 3B is a plan view, and FIG. In the figure, the upper side in (a) is the lower side in (c). Further, (d) is a side view. 4 is an exploded perspective view of the plug connector of FIG.
[0082]
3 and 4, the plug connector 20 includes an insulator 23, a plurality of pairs of signal contacts 22 press-fitted into the insulator 23, and ground contacts disposed around each of the pair of signal contacts 22. 21.
[0083]
As best shown in FIG. 4, the signal contact 22 has an L-shape formed by punching out from a single plate and bending press processing, and press-fit portions 22a and 22a protruding so as to be symmetrical in the width direction. From the support part 22b provided with the substrate parallel part 22c formed by bending the rear part of the support part 22b so as to form an L shape upward, and from the tip bent slightly backward from the substrate parallel part 22c The mounting terminal portion 22d is thinner than the tip and extends upward. Two signal contacts 22 are provided side by side in the width direction of the insulator 23. At the time of fitting, the bottom surface on the front end side of the support portion 22b and the contact portion 1c of the signal contact 1 of the receptacle connector 10 are in contact with each other.
[0084]
The ground contact 21 is made of a substantially U-shaped (U-shaped) metal plate formed by bending and punching a single U-shaped single plate, and has a bottom surface portion 21c. And both side surface portions 21b. A pair of press-fit portions 21a and 21a are formed symmetrically with the bottom surface portion 21c together with the formation of the side surface hole portion 21d, and the left and right side surfaces are bent and raised to form outward from the hole portion 21d. The press-fit portions 21a and 21a are provided so as to protrude symmetrically on the left and right sides. The press-fit portions 21a and 21a contribute to fixing to the insulator 23 and positioning in the width direction. Further, the bottom surface of the front end of the bottom surface portion 21c serves as a contact portion for contacting the contact portion 2c of the counterpart ground contact 2. In addition, a bent piece 21h bent inward is provided at the front upper end of the side face portion 21b so as to face each other from both sides, and a groove cut in the vertical direction is provided at the rear end of the bent piece 21h. Thus, a protruding portion 21e is provided at the left and right symmetrical positions at the upper end portion of the side surface portion 21b extending further upward than the bent piece 21h. This protrusion 21 e is provided for positioning in the thickness direction of the insulator 23 when it is press-fitted into the insulator 23. From the protrusions 21e, 21e toward the rear end, the mounting terminal portion 21g protrudes further from the rear end to the rear end via the step portion 21f, and extends upward along the rear end. Is formed.
[0085]
The ground contact 21 is inserted into the insulator 23 so as to surround the pair of signal contacts 22 and 22 described above. In addition to the press working, the ground contact 21 can be formed by etching or the like.
[0086]
The insulator 23 includes an opening 27 that opens forward, a support 24 that is arranged in the width direction in the opening 27 and protrudes in two upper and lower rows, and mounting terminal portions 22d and 21g at the rear end. In order to accommodate each, the groove part 26 provided along with the width direction is provided. This groove portion 26 is provided so as to penetrate through a contact accommodating portion 25 described below.
[0087]
Fitting portions 25 extending in the front-rear direction of the insulator 23 are provided in two steps symmetrically in the vertical direction and arranged in the width direction. In the fitting portion 25, a signal contact accommodating portion 24 is further provided.
[0088]
Around the signal contact accommodating portion 24 in the fitting portion 25, a ground contact accommodating portion 25 a having a U-shaped hole is provided so that the ground contact 21 can be accommodated. The ground contact 21 is press-fitted into the ground contact accommodating portion 25a. At that time, the U-shaped part at the front end is located above the center groove in the vertical direction, the U-shaped opening from the upper groove in the vertical direction, and the U-shaped opening at the lower front end. It is mounted so that is facing downward.
[0089]
The signal contact accommodating portion 24 is provided with through grooves 24a and 24a provided in the front-rear direction and through holes 24b penetrating rearward from the end of the through grooves 24a and 24a. The signal contact 22 is press-fitted into the insulator 23 so that the signal contact is press-fitted into the through-hole 24b and accommodated in the through-groove 24a.
[0090]
Therefore, the ground contact 21 is provided in the insulator 23 so as to surround the pair of signal contacts 1 and 1 constituting one signal line, and the pair of signal contacts 22 and 22 adjacent to each other is a pair of signal contacts. The contacts 22 and 22 are configured to be separated from each other and shielded from each other by the respective ground contacts 21.
[0091]
When the receptacle connector 10 of FIGS. 1 and 2 and the plug connector 30 of FIGS. 3 and 4 are fitted together, the protrusions 12 and 12 on both sides of the insulator 3 and the recesses 28 on both sides of the insulator 23 are aligned and positioned. At the same time, the protruding portion of the signal contact accommodating portion 24 of the plug connector 30 enters the space formed between the protrusion 9 of the receptacle connector 10 and the signal contact accommodating portion 8. In this state, the contact portions 21c and 22b of each signal contact come into contact with each other, and the contact portion 2c having the spring property of the ground contact 2 of the receptacle connector 10 is a contact formed by the bottom portion 21c of the ground contact 21 of the plug connector 30. It will be in a combined state in the state which contacted the part.
[0092]
The connector according to the embodiment of the present invention described above has the mounting terminal portions 1d, 2j, 21g, and 22d formed by bending on the opposite side to the one side of the signal contact. The parallel running section has a structure that is not located in a distance relationship that does not affect the impedance even if the ground layer comes sufficiently away from the substrate and comes to the surface of the substrate.
[0093]
In addition, the signal contacts have a positional relationship in which impedance matching is achieved on the opposing surface of the ground contact.
[0094]
Further, the signal contacts 1 and 22 which are signal elements between adjacent ones are shielded by the ground contacts 2 and 21 formed in a U shape by pressing or etching from a single plate. By encircling the three sides, the crosstalk between the signal lines can be reduced to the limit, and the characteristic impedance can be easily adjusted, so that the reflected noise due to impedance mismatch can be reduced, the signal transmission quality can be improved, and the connector It does not increase in size and has a cost-effective structure.
[0095]
【The invention's effect】
As described above, according to the present invention, the signal line is a single-plate ground in which each signal element is continuous, and the direction in which the adjacent signal or signal pair is present is almost completely shielded. Thus, it is possible to provide a high-speed transmission connector that can easily exert the effect of the above and can further reduce crosstalk.
[0096]
In addition, according to the present invention, since the back side of the contact surface of the signal line is received by the housing, even when the contact thickness is reduced, the strength as a pin contact is maintained and the impedance is also reduced. It is possible to provide a high-speed transmission connector that is easy to manage.
[0097]
In addition, according to the present invention, the contact width can be easily set by punching or etching with a press, and a hole is formed in the insulator at the time of molding, so that the connector for high-speed transmission can easily cope with sections having different dielectric constants. Can be provided.
[0098]
In addition, according to the present invention, forming a U-shape from a single plate, that is, forming a three-surface ground, can be processed by a press or the like, and can be easily processed at a low cost by providing a press-fitting piece or a dowel. . Further, by providing these, it is possible to provide a high-speed transmission connector that can be easily positioned and held, and that can provide electrical performance close to a four-surface ground.
[Brief description of the drawings]
1A and 1B are diagrams showing a receptacle connector of a high-speed transmission connector according to an embodiment of the present invention, wherein FIG. 1A is a front view, FIG. 1B is a plan view, FIG. 1C is a rear view, and FIG. FIG.
2A is an exploded perspective view of the receptacle connector of FIG. 1. FIG.
FIG. 3B is a partial cross-sectional perspective view of the ground contact of FIG.
3A and 3B are diagrams showing a plug connector of a high-speed transmission connector according to the embodiment of the present invention that fits into the receptacle connector of FIG. 1, wherein FIG. 3A is a front view, FIG. 3B is a plan view, and FIG. A rear view and (d) are side views.
FIG. 4 is an exploded perspective view of the plug connector of FIG. 3;
FIG. 5 is a perspective view showing an example of a conventional connector.
6 is a cross-sectional view of the connector of FIG. 5 along the line BB.
FIGS. 7A and 7B are perspective views respectively showing a plug side contact and a receptacle side contact used in a connector according to another example of the prior art.
8 is a partially broken perspective view showing a plug-side connector of the connector of FIG. 7. FIG.
9 is a partially cutaway perspective view showing a receptacle-side connector of the connector of FIG. 7. FIG.
10 is a partial cross-sectional view showing a fitting state of the connector of FIG.
FIG. 11 is a perspective view of a motherboard connector according to still another example according to the prior art.
12 is a perspective view showing an assembled state of the daughter board side connector of FIG. 11. FIG.
13 is an exploded perspective view of the daughter board side connector of FIG. 12. FIG.
14 is a cross-sectional view taken along arrow XIV-XIV in FIG. 13;
[Explanation of symbols]
1 Signal contact
1a Press-in part
1b Support part
1c Contact part
1e Substrate parallel section
1d Mounting terminal
2 Ground contact
2a Press-in part
2b Bottom part
2c Contact part
2d hole
2g side
2h side
2j Mounting terminal
3 Insulator
5 Fitting part
5a Ground contact housing
6,7a, 7b Groove
8 Signal contact housing
8a Through groove
8b Through hole
10 Receptacle connector
11 Protruding piece
12 Protrusion
20 Plug connector
21 Ground contact
21a Press-fit part
21b Side part
21c Bottom part
21d hole
21e Protruding part
21f Step
21g mounting terminal
21h bent piece
22 Signal contact
22a Press-fit part
22b Support part
22c Substrate parallel section
22d mounting terminal
23 Insulator
24 Signal contact housing
24a Through groove
24b Through hole
27 opening
25 Fitting part
26 Groove
51 Connector body
52 contacts
53 holes
54 Metal plate
55 Printed circuit board
60 Plug side connector
61 Signal contact
63 Ground contact
65 Insulator
65a bottom part
65b side wall
65c insertion hole
65d Standing part
65f engagement recess
70 contacts (plug side contacts)
71 Signal contact
73 Ground contact
75 Insulator
77 Groove
80 contacts (receptacle side contacts)
90 Receptacle connector
101 Motherboard connector
102 U-shaped cross section housing
103 contacts
103a terminal
104 Ground contact
105 Daughter board side connector (connector)
110 Housing
111 Signal contact holding hole
112 Ground plate holding groove
113 Shield plate holding hole
114 slits
120 Unit insulator (insulator)
120a upper surface
120b rear surface
121 slit
122,123 Convex
125 Plastic plating (conductive layer)
130 Signal contact
131 Contact part
132 Terminal
140 Ground plate (Ground contact)
141 base
142 First press-fit portion
143 Second press-fitting part
144 Contact part
150 Shield plate (conductive terminal)
151 Multiple holes
152 Terminal
153 hole
154 Press-fit part
155 Press-fit protrusion

Claims (4)

In the connector used by being mounted on a substrate, the connector includes a signal contact, a ground contact, and an insulator for holding and fixing these,
The signal contact is formed in a substantially L-shape, a contact portion connected to the mating connector on one side of the L shape, a terminal portion connected to the substrate on the other side of the L shape, and wider than the terminal portion, And a substrate parallel running section that is parallel to and spaced apart by a predetermined distance,
The ground contact is formed in a substantially U shape, a contact portion connected to the other side at the bottom of the U shape, a pair of terminal portions connected to the substrate on the open side of the U shape, and an insulator on both sides of the bottom of the U shape A pair of press-fitting parts that are press-fitted and held, and a pair of positioning parts that position the ground contact on the U-shaped open side ,
The pair of press-fitting portions perform positioning in the width direction of the insulator, which is the pitch direction of the contacts, and the pair of positioning portions perform positioning in the thickness direction of the insulator perpendicular to the width direction of the insulator,
2. A connector characterized in that two pairs of the signal contacts are disposed within a U-shape of the ground contact, and the terminal portions of the pair of signal contacts are disposed between the pair of terminal portions of the ground contact. A plug connector comprising the connector according to claim 1 . A receptacle connector comprising the connector according to claim 1 . A connector device comprising a pair of plug connectors and receptacle connectors for fitting the connectors according to claim 1 together, wherein one signal contact of the pair of connectors is a signal contact of the other connector at the time of fitting. The contact portion is provided with a spring property so that the contact portion is in contact with each other, and the contact portion is provided with a spring property so that one ground contact of the pair of connectors is in contact with the ground contact of the other connector. In addition, the ground contact is provided with a pair of contact portions so as to correspond to the pair of signal contacts .

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