TWI755396B - Socket and Connector Assemblies - Google Patents

Abstract

A socket is shown. The socket can provide two rows of terminals to increase the density of the interface. If desired, a connector in the receptacle can omit the use of a base even if the receptacle provides a stacked connector configuration. Through the use of various air flow features, plug modules that employ over 6 watts and potentially over 8 watts of power can be cooled.

Description

Socket and Connector Assemblies

The present invention relates to the field of input/output (IO) connectors, and more particularly to IO connectors suitable for high data rate applications.

Input/Output (IO) connectors are designed to support high data transfer rates and many improvements have been developed to help provide data transfer rates of up to 25Gbps and even higher. However, in order to support customer needs and desires, many companies are investigating ways to support higher data transfer rates. As a result, development work is underway to support 50Gbps using NRZ encoding and 100Gbps using PAM 4 encoding. However, these improvements would create significant problems with existing manufacturing techniques, as conventional circuit boards cannot readily support 25GHz signals. As a result, new architectures and approaches will be required.

Another way to support increased data transfer rates has been to try to increase the number of ports. One way to increase the number of ports is to reduce the size of the connector. For example, many standard connectors are typically designed to work at 0.8mm or 0.75mm pitch and a connector standard supporting 0.5mm has recently been approved (OCULINK connectors). While reducing connector size is effective for blank board designs and supporting very high densities in the front of the rack, smaller connectors are more problematic for fiber optic connector designs, as the very small size makes Sufficient dissipation of thermal energy from the connector becomes a problem. They also tend to feature conductors of smaller size, which makes it difficult to support cables longer than 2 or 3 meters. Other Furthermore, the size of this new smaller connector creates potential problems for some degree of backward compatibility that is desired. As a result, certain groups of people will appreciate further improvements in connector technology.

A connector is disclosed that includes a set of sheets formed by an insulating frame supporting a plurality of terminals. The sheet assembly can be located in a housing without the need for a base. The card slot elements are aligned with the contacts of the plurality of terminals. In one embodiment, a connector may include a sheet that supports two rows of terminals on both sides of a card slot and the connector may be arranged to have a press-fit tail.

The socket of the present invention includes a cover body with a top wall, two side walls and a rear wall, the cover body defines a port; a sheet body group is located in the cover body, and the sheet body group includes a plurality of A sheet body, the terminal tail of the sheet body group is in direct contact with a circuit board, the sheet body group has a first side, a second side and a third side, and each sheet body in the sheet body group has a support an insulating frame for a plurality of terminals, wherein at least a portion of the sheets in the set of sheets are arranged in a pattern of ground, signal, signal; a first retaining bar located on the first side; and A second holding strip is located on the second side.

In some implementations, the second side is opposite the first side.

In some implementations, the first retaining strip extends from one of the two side walls to the other side wall.

In some embodiments, the first retaining strip extends beyond the set of sheets.

In some embodiments, it also includes a card slot unit supported by the sheet body set pieces.

In some embodiments, the plurality of sheets extend to the top wall.

In some embodiments, the plurality of sheets have a plurality of notches located adjacent to the top wall of the insulating frame to provide a meander along the top wall and through the plurality of notches Serpentine air path.

In some embodiments, the sheets have sheet agglomerates, the retaining bars are formed with openings, and the retaining bars are connected to the sheets by the openings coupled to the sheet agglomerations of the sheets body.

In some embodiments, the sheet body has sheet body agglomerates, and the sheet body agglomerates are heat-fused to the holding bars.

In some embodiments, the sheets include a signal sheet group and a ground sheet, and the sheets located in the signal sheet groups have a different agglomeration height than the sheets located at the ground sheets.

The socket of the present invention includes a cover body defining an upper port and a lower port; a sheet body group located in the cover body and directly supported by the cover body, wherein, the sheet body group includes a front side and an upper side and a rear side, the terminal tail of the sheet body group is in direct contact with a circuit board; a first card slot plug supported by the sheet body group and located in the upper port; a second card slot plug , which is supported by the sheet body group and located in the lower port; and at least one holding bar, which fixes the sheet body group together.

In some embodiments, the at least one retaining strip includes a A first holding strip and a second holding strip located on the rear side.

In some embodiments, there are two retaining bars on the rear side, and the three retaining bars form a triangular arrangement.

The connector assembly of the present invention includes a housing defining a port; a card slot in the port; and a set of sheets aligned with the card slot, the set of sheets including a plurality of sheets , each sheet supports at least four terminals, wherein the plurality of terminals are arranged such that two rows of contacts are provided on a first side and a second side of the card slot, the terminals of the sheet group The tail is in direct contact with a circuit board. At least one retaining strip that holds the set of laminae together.

In some embodiments, the two rows of contacts on the first side are opposite to the two rows of contacts on the second side, and form a front-upper row of contacts, a rear-upper row of contacts, and a front-upper row of contacts. A lower row of contacts and a rear lower row of contacts, wherein the rear upper row of contacts and the rear lower row of contacts are vertically aligned and have pad contact portions that are offset from each other.

In some embodiments, the two rows of contacts on the first side are opposite to the two rows of contacts on the second side, and form a front-upper row of contacts, a rear-upper row of contacts, and a front-upper row of contacts. The lower row of contacts and a rear lower row of contacts, wherein the terminals forming the rear upper row of contacts and the rear lower row of contacts have tails aligned with the front upper row of contacts and the rear lower row of contacts. between the tails of the terminals of the front lower row of contacts.

10: circuit board

20: Plug module

100: socket

105: Light Pipe

115: Cooling tank

120: cover body

121a: go to port

121b: Lower port

122: Top Wall

122a: Openings for cooling

123: First side wall

124: Second side wall

124a: Notch

125: Back Wall

126: Leading edge

129: Connector

129a: Plugins

130: Front grille

132: Rear opening group

133: Externally placed radiator

134: Internally placed radiator

135: Vent hole

140, 141: Bottom wall

142: Tongue

150, 160: Card slot plug

151: Card slot

151a, 151b: side

152, 162: butt joint

153, 163: groove for tongue

154: Groove

155: Terminal slot

156a, 156b: shoulder

166: Legs

170: Opening

171: Retaining strip

172: Vent hole

220: Flake body group

221: Flakes

221a: Insulating frame

224: Upper protrusion

226: Raised

228: Arm

228a: Notch

229: Flakes agglomerate

245: Front contact row

246: Rear contact row

250: Signal sheet body group

251: first signal sheet

252, 262, 272: Terminal group

253: Terminal

253a: Contacts

253b: tail

253c: body part

254a: first differential pair

254b: Second differential pair

254c: Third differential pair

254d: Fourth differential pair

255a: Fifth differential pair

255b: Sixth differential pair

255c: seventh differential pair

255d: Eighth differential pair

256a, 256b: Shape

257a, 257d: differential tail group

257b, 257c: differential tail group

258a, 258d: Contact pair

258b, 258c: Contact pair

261: Second signal sheet

263: Terminal

263a: Contacts

263b: tail

263c: body part

271: Ground Sheet

301a, 301b: gasket contact part

302a, 302b: Beam part

The present invention is illustrated by way of example but not limited to the accompanying drawings, in which like reference numerals refer to like parts, and in the drawings: FIG. 1 shows a perspective view of an embodiment of a connector system.

Figure 2 shows a perspective cutaway view of the embodiment shown in Figure 1 taken along line 1-1.

FIG. 3 shows another perspective view of the embodiment shown in FIG. 1 .

FIG. 4 shows a simplified perspective view of the embodiment shown in FIG. 3 .

FIG. 5 shows a perspective view of an embodiment before a plug module is inserted into a socket.

Figure 6 shows a perspective view of an embodiment of a socket.

FIG. 7A shows a perspective cutaway view of the embodiment shown in FIG. 6 taken along line 7-7.

Figure 7B shows an enlarged simplified perspective view of the embodiment shown in Figure 7A.

Figure 7C shows an enlarged perspective view of the embodiment shown in Figure 7A.

Figure 8 shows a perspective view of the embodiment of Figure 6 with the cover partially removed.

Figure 9 shows a simplified perspective view of the embodiment of Figure 6 with the top wall and front of the enclosure removed.

Figure 10 shows a perspective cutaway view of the embodiment shown in Figure 7A with a top wall modified.

FIG. 11A shows a perspective view of an embodiment of a connector.

FIG. 11B shows an enlarged perspective view of the embodiment shown in FIG. 11A.

Figure 12 shows another perspective view of the embodiment shown in Figure 11A.

Figure 13 shows a partial isometric exploded view of the embodiment shown in Figure 11A.

FIG. 14 shows an enlarged perspective view of the embodiment shown in FIG. 13 .

Figure 15 shows a perspective view of the embodiment of Figure 13 with the card slot plug removed.

FIG. 16 shows a perspective view of an embodiment of a holding bar securing a sheet body group.

17 shows an exploded perspective view of a portion of an embodiment of a connector.

Figure 18 shows an exploded perspective view of a portion of an embodiment of a signal foil pair surrounded by two ground foils.

Figure 19 shows a simplified perspective view of the embodiment of Figure 18 with an insulating frame removed for illustration purposes.

Figure 20 shows a perspective view of an embodiment of a signal wafer pair.

Figure 21 shows a perspective view of this embodiment with the insulating frame removed.

22 shows a perspective view of an embodiment of a plurality of terminals providing a row of contacts in the lower port.

FIG. 23 shows another perspective view of the embodiment shown in FIG. 22 .

FIG. 24 shows a side view of the embodiment shown in FIG. 22 .

FIG. 25A shows a plan view of the embodiment shown in FIG. 21. FIG.

Figure 25B shows an enlarged plan view of the embodiment shown in Figure 25A.

Figure 26 shows a schematic diagram of an embodiment of a connector with an insert.

The following detailed description describes various exemplary embodiments and is not intended to be limited to the explicitly disclosed combinations. Thus, unless stated otherwise, various features disclosed herein may be combined together to form various additional combinations not shown for brevity.

As can be appreciated from FIGS. 1-5 , a socket 100 is mounted on a circuit board 10 and provides a right-angled structure configured to receive the plug module 20 . The illustrated receptacle 100 is designed to be beneficial for use with multiple plug modules 20 that include multiple cooling slots 115 . Although not required in a module 20 Cooling slot 115 is used, but cooling slot 115 can provide additional cooling and, when used in conjunction with other features disclosed herein, make it easy to cool a plug module 20 that utilizes more than 8 watts of power.

Referring to Figures 1, 4 and 6, the socket 100 includes a housing 120 and can support the light pipe 105 if desired. The cover body 120 includes a top wall 122 , a first side wall 123 , a second side wall 124 , a rear wall 125 and a front edge 126 . The socket 100 defines an upper port 121a and a lower port 121b. The first side wall 123 and the second side wall 124 may each include a plurality of ventilation holes 135 .

Referring to FIGS. 6 , 7A and 10 , as can be appreciated, the design shown is intended to facilitate cooling of an inserted plug module 20 . As such, the design has been tailored to enhance air flow in a number of ways as will be described herein. In certain embodiments, the socket 100 may include an internal riding radiator 134 in communication with a front grill 130 and a rear set of apertures 132 . The top wall 122 may include a cooling opening 122a and an externally riding radiator (not shown) can be positioned within the cooling opening 122a. The two seated heat sinks 134 are typically designed to extend into the upper and lower ports 121a, 121b and engage an inserted header module 20, which helps to provide a thermally conductive path to conduct heat away from the header module 20 . It should be noted that this additional cooling may be undesirable in some environments (eg, in applications where active modules will not be employed) and many optional thermal features can be omitted in these cases. Thus, if not required, the shown internally housed heat sink 134 and various ventilation features may be omitted.

A conventional design of existing receptacles employs a base within a housing that helps define a connector. The housing helps support the mating plug module, helps support the connector, and also provides EMI protection. The connector within the housing supports a plurality of terminals including tails and contacts, a plurality of The terminals allow mating plug modules to be electrically connected to a circuit board (or cable, if a Bipass design is desired). Receptacles are typically press fit onto a circuit board for ease of assembly, whereby the receptacle must align the terminals of the connector with the terminals on the housing. As can be appreciated, the hood may be formed of metal and a reasonably repeatable layout with multiple tails with desired dimensional control relative to each other is contemplated. The multiple tails of the connector can be carefully manufactured so that they are aligned with each other. However, it is slightly more difficult to align the tail of the connector with the tail of the housing, as there are multiple points of dimensional overlap. This size problem is compounded by the fact that in a typical seat-supported wafer, wafer-supported terminal press fit design. Thus, the terminals within a wafer are dimensionally controlled relative to each other but have a dimensional overlap with respect to the base and other wafers, and the base and cover have a dimensional overlay. Existing designs attempt to use a datum as a stop to carefully control the insertion of the base into the housing to control the error between the position of the datum and the tail of both the housing and the connector.

Referring to Figures 7A-7C, while this control is possible, it turns out to be more problematic and more difficult, especially as the tails decrease in size. Applicants have determined that rather than having a stop point that limits and controls the position of the base relative to the housing, it is preferable to have a system in which the housing 120 and connector 129 can be connected in such a manner Bottom butt together, ie allowing infinite adjustment within a small range so that the mating of the housing 120 and the connector 129 (see Figure 11A) can be performed in a controlled manner and dimensional control can be ensured. As shown, the cover 120 includes bottom walls 140 , 141 each having a tongue 142 that is inserted into the corresponding card slot plug 150 , 160 . More specifically, the tongue portion 142 is inserted into the tongue portion grooves 153 , 163 in the abutting portions 152 , 162 of the card slot plugs 150 , 160 from the cover body 120 , respectively. As can be appreciated, the card slot plugs 150, 160 engage a wafer set 220 and will lift For some additional size stacking between the two. In one embodiment, the insertion can be based on the alignment between the sheet set 220 and the shell 120, thereby eliminating some of the dimensional overlap that would otherwise exist. In one embodiment, the tongue 142 is an interference fit with the tongue grooves 153, 163 so that the housing 120 and the connector 129 are properly engaged and held in the correct position relative to each other. Such a manufacturing process allows for better control of the position of the housing 120 and the laminar group 220 relative to each other and improves the yield strength of the socket 100 while ensuring that the socket 100 can be properly mounted on the circuit board 10 .

Referring to Figures 11A, 15 and 16, as can be appreciated from the figures, the connector 129 is shown omitting a base. Applicants have surprisingly found that it is not necessary to use a base to support a laminar group 220, as long as the laminae 221 are securely fastened together, preferably on at least two sides. In the illustrated embodiment, the retaining bars 171 are located on opposite sides and one of the two sides has two retaining bars 171 , the retaining bars 171 having openings 170 . The holding bar 171 is connected to the plurality of sheet bodies 221 through a plurality of sheet body nubs 229 through the opening 170 , and the sheet body nubs 229 can be thermally welded to the holding bar 171 . The connector 129 shown shows an embodiment in which a triangular layout is provided with two retaining bars 171 on one side and one retaining bar 171 on the other side of the laminar body set 220 . Although it is desirable to have at least two retaining bars 171 (each on a different side of the connector 129 ), a triangular arrangement of retaining bars 171 has been determined to be beneficial because it is the plurality of lamellae that make up the lamella set 220 The 221 offers improved control and support. It has been determined that removing the pedestal provides some unexpected benefits. One problem is that no pedestal is perfectly square and straight, whereby the error of the pedestal adds to the error of the lamella and thereby increases the error in the position of the tail. By removing the base, the applicant can better control the position of the tail of the laminar body group 220 relative to the cover body 120 . Removing the base also allows the size of the socket 100 to be reduced, thereby allowing for increased degree of encryption.

Referring to FIG. 8 , FIG. 19 and FIG. 21 , each sheet body 221 includes an insulating frame body 221 a. Insulating frame 221a is shown—including upper protrusions 224 and supporting terminal sets 252, 262, 272 (as expected, in various embodiments, there is a three-lamella system that includes a grounding lamella and two signal sheets). It should be noted that the configuration of the terminals shown, while beneficial to the receptacle 100 shown, is not intended to be limiting, as the features of providing a connector without a base have a wide range of features. applicability. The design features thus provided to remove the base can be used with a wide range of laminar structures.

8, 20 and 21, the terminal group 252 includes a plurality of terminals 253, each terminal 253 includes a contact 253a, a tail 253b and a body 253c extending between the contact 253a and the tail 253b. Similarly, terminal set 262 includes a plurality of terminals 263 including a contact 263a, a tail 263b, and a body portion 263c extending between the contact 263a and the tail 263b. Because the tails 253b, 263b are shown to be press-fit into a circuit board, it helps to provide a socket in which force can easily be applied to the tails 253b, 263b to press the tails into vias on a circuit board ( vias). As shown, the insulating frame 221a includes a plurality of upper protrusions 224 extending to a top wall 122 of the housing 120 (see FIG. 7A). As a result of the design shown, the force exerted on the housing 120 is transmitted to the tails 253b, 263b via the insulating frame 221a and thus a reliable press-fit operation is possible.

The upper protrusion 224 is shown with a plurality of notches 124a so that the laminar body 221 engages the top wall 122 in several positions but still with clearance. The plurality of notches 124a can be provided in a pattern that allows air to flow along the top wall 122 of the enclosure 120 in a desired manner. As can be appreciated, the number and size of the notches 124a And the position can be appropriately changed to provide the required air flow.

It should be noted that the plurality of notches 124a do not provide a straight path for the air to flow between the plurality of sheets 221 and the top wall 122, but rather the plurality of notches 124a provide a tortuous path for the air to flow through. , and thus may increase the pressure drop of air flowing through the socket 100 . Although the path shown may be considered to be a zig-zag or undulating path, other forms of paths may be provided, depending on the configuration of the top wall 122 . In an alternative embodiment, the upper protrusion 224 can be shortened and an insert 129a (shown schematically in FIG. 26 ) can be located between the laminar body set 220 and the top wall 122 . The insert 129a can transfer force from the top wall 122 to the plurality of lamellae 221 while providing a more optimized air flow path between the top wall 122 and the stack of lamellae 220 (thereby reducing air resistance). In another alternative embodiment, the insert 129a may be removable and used only to install the connector 129 on the circuit board 10 prior to removal. In such a design, the rear wall 125 of the housing 120 can abut and the opening can provide a reduced air resistance. Numerous variants are thus possible, depending on the required air flow and the desired management costs.

Referring to Figures 7A, 13 and 15, the design shown provides a plurality of sheets 221 having a front row 245 of contacts spaced in the direction of insertion of a plug module 20 (see Figure 5) and a The rear contact row 246 and the two contact rows are configured to engage the two rows of pads of a mating connector. Although not required, the benefit of such a design is a significant increase in density. If this density is not desired, multiple sheets 221 can be made to support a smaller number of terminals. It should be noted that the plurality of sheets 221 are shown arranged in a pattern to provide a ground, signal, signal pattern that can be repeated. Such as Other modes are possible if desired. If desired, the plurality of ground wafers 271 may include a plurality of terminals that are commoned together and in one embodiment, the plurality of ground wafers 271 may have contacts that engage the top wall 122 , thereby being the housing 120 Provide electrical grounding.

Referring to Figures 11A, 11B and 13, the connector 129 is shown utilizing a thin body because the connector 129 does not require a base (although a base is possible if desired in some embodiments) The group 220 supports the card slot plugs 150 , 160 . As shown, the card slot plugs 150, 160 each have shoulders similar to the shoulders 156a, 156b that snap to the retention features of at least some of the wafers 221 of the wafer set 220 to provide the desired Position and stability control. In one embodiment, only the ground sheet 271 may include retention features. As shown, shoulders 156a, 156b may have grooves 154 that engage protrusions 226, although other retention configurations are suitable. Referring to FIG. 7A , the card slot plugs 150 , 160 are located in the ports 121 a , 121 b defined by the cover 120 and provide a card slot 151 with a plurality of contacts on both sides of the card slot 151 . The card slot 151 preferably includes a plurality of terminal slots 155 for the front row of contacts 245 so that most of the vulnerable contacts are protected during initial mating with a mating plug connector. Because the fronts of the card slot plugs 150, 160 assist in aligning and controlling mating cardboards, the rear contact row 246 may beneficially omit terminal slots. If desired, a card slot plug 160 may include a leg 166 that will be inserted into the circuit board 10, but such a feature is optional and is expected to facilitate including two vertically arranged in a 2XN configuration port design.

Referring to FIGS. 7A , 8 and 15 , in one embodiment, the retaining bar 171 can be configured to engage the cover 120 . The retaining bar 171 can be made wider than the sheet body group 220 , so that the retaining bar 171 slides along the side walls 123 and 124 of the cover body 120 . If such a configuration is desired (which helps ensure that the hood 120 is properly aligned with the lamella body set 220), then the retention bar 171 may include vent holes 172 to allow air to flow more easily through the socket 100 (see FIG. 1).

Referring to Figure 11B, it has been confirmed that for a complete dual row design it is desirable that the contacts are all blanked formed (it has been confirmed that this provides mechanical and signal integrity benefits) . The embodiment thus shown features two rows of contacts that are stamped and formed on both sides 151a, 151b of the card slot 151 .

Referring to FIGS. 13 and 15 , in order to support the front contact row 245 , the sheet body 221 includes an arm portion 228 extending beyond the rear contact row 246 . The arms 228 help ensure that the impedance is managed more consistently across the body of the sheet 221 . To provide suitable flexibility, the arm portion 228 may include a notch 228a that allows the arm portion 228 to flex slightly.

18, 19 and 21, as described above, each terminal includes a contact, a tail, and a body portion extending between the contact and the tail. The illustrated configuration includes a ground sheet 271 and a signal sheet set 250 including a first signal sheet 251 and a second signal sheet 261 . The signal wafer set 250 thus provides a first differential pair 254a, a second differential pair 254b, a third differential pair 254c, and a fourth differential pair 254d for the upper port 121a. Referring to FIG. 22 , the signal chip set 250 further provides a fifth differential pair 255a, a sixth differential pair 255b, a seventh differential pair 255c, and an eighth differential pair 255d for the lower port 121b. Referring again to FIG. 24, it can be appreciated from the terminal configuration shown that, for the upper port 121a and the lower port 121b, the terminals forming the two rear differential pairs have their tails positioned on the two differential pairs forming the front contacts. between the tails. For example, differential tail groups 257b, 257c are associated with contact pairs 258b, 258c, respectively, while contact pairs 258b, 258c are in the rear contact row. differential tail Sectional groups 257a, 257d flank the differential tail groups 257b, 257c and are associated with contact pairs 258a, 258d in the leading contact row. It has been determined that this configuration is beneficial because it allows three rows of terminals of similar length, albeit with one significantly longer terminal. The embodiments thus shown help to provide more consistent terminal lengths.

Referring to Figures 22, 23 and 25B, as can be appreciated, an upper row of contacts is opposed to a lower row of contacts. In one embodiment, the contacts forming the terminals of the upper row of contacts may have a shape 256b that is bent along a first direction, and the terminals forming the contacts of the lower row may have a shape 256a that also extends along the Bend in the first direction. For example, all sets of contacts may have shapes that are bent to one side (eg, the shapes can all be bent left or right) when the contacts are viewed straight in the direction of insertion of a plug module. While such a configuration is beneficial, it turns out that for some applications it may be desirable to offset the upper row of contacts from the lower row of contacts. To provide this function, the contacts may taper down from a beam portion 302a, 302b to a pad contact portion 301a, 301b, wherein the pad contact portion 301a, 301b is less than half the width of the beam portion 302a, 302b. If desired, the pad contacts 301a, 301b of the upper row may be located on opposite sides of the beam portions 302a, 302b from the pad contacts 301a, 301b of the lower row to provide an offset alignment. If such an alignment is not required, the plurality of contacts can be configured symmetrically or in other desired configurations.

The spacing can vary depending on the interface used. As shown, the terminals are at an x-spacing, which is 0.8 mm, and the upper and lower terminals may have a y-offset, which may be 0.4 mm. If the connector provides an upper and lower double row of contacts and the front contacts are to be compatible with the existing design, it is beneficial to match the spacing of the contacts to the existing design. If a blank board design is preferred, the spacing can vary as needed, keeping in mind that signal integrity performance becomes more challenging as the spacing decreases below 0.8mm, and A pitch below 0.65mm typically requires additional features, such as biased boards and/or contact interfaces (such as those used in OCULINK connectors).

The invention presented herein is illustrative of various features in its preferred and exemplary embodiments. After reading this disclosure, those skilled in the art will make numerous other embodiments, modifications and variations that are within the scope and spirit of the appended claims.

10: circuit board

20: Plug module

100: socket

Claims (16)

A socket, comprising: a cover body with a top wall, two side walls and a rear wall, the cover body defines a port; a card slot located in the port; a sheet body set located in the port In the cover, the sheet set includes a plurality of sheets, each sheet supporting at least four terminals, wherein the plurality of terminals are arranged such that two rows of contacts are arranged in a first one of the card slots. side and a second side, the terminal tails of the sheet set are in direct contact with a circuit board, the sheet set has a first side, a second side and a third side, each of the sheet sets The sheet body has an insulating frame body supporting a plurality of terminals, at least one terminal of the sheet body group has a bent shape, and the bent shape defines a contact end of the at least one terminal facing the top wall, Wherein, at least a part of the thin sheets in the thin sheet group are arranged in a mode of ground, signal, and signal; and a first holding bar is located on the first side. The socket of claim 1, further comprising a second retaining bar on the second side, the second side being opposite to the first side. The socket of claim 1, wherein the first retaining bar extends from one of the two side walls to the other side wall. The socket of claim 3, wherein the first retention bar extends beyond the set of sheets. The socket of claim 1, further comprising a card slot member supported by the sheet body group. The socket of claim 1, wherein the plurality of sheets extend to the top wall. The socket of claim 6, wherein the plurality of sheets have a plurality of notches located adjacent the top wall of the insulating frame to provide a plurality of indentations along the top wall and through the plurality of Notched for a meandering air path. The socket of claim 1, wherein the sheets have sheet agglomerates, the retaining bars are formed with openings, and the retaining bars are connected by the openings coupled to the sheet agglomerates of the sheets in these flakes. The socket according to claim 1, wherein the sheet body has sheet body agglomerates, and the sheet body agglomerates are thermally welded to the holding bars. The socket of claim 8, wherein the sheets include a signal sheet group and a ground sheet, and the sheets located in the signal sheet groups are agglomerated at a height of the sheets located at the ground sheets. Different heights. A socket, comprising: a cover body defining an upper port and a lower port, the cover body having a top wall; a first card slot located in the upper port; a second card slot located in the upper port In the lower port; a sheet body group, located in the cover body and directly supported by the cover body, wherein, and the sheet body group includes a front side, an upper side and a rear side, the terminals of the sheet body group The tail part is in direct contact with a circuit board, and at least one terminal of the sheet body group has a bent shape, and the bent shape defines a contact end of the at least one terminal facing the top wall; a first card is inserted a slot plug supported by the sheet body set and located in the upper port; a second card slot plug supported by the sheet body set and located in the lower port; and at least one retaining bar that holds the the sheet body groups are fixed together, the sheet body The set includes a plurality of sheets, each sheet supporting at least four terminals, wherein the plurality of terminals are arranged such that two rows of contacts are disposed in at least one of the first card slot and the second card slot. a first side and a second side of one of them. The socket of claim 11, wherein the at least one retaining bar includes a first retaining bar on the front side and a second retaining bar on the rear side. The socket of claim 12, wherein there are two retaining bars on the rear side, and the three retaining bars form a triangular arrangement. A connector assembly, comprising: a cover body defining a port, the cover body having a top wall; a card slot located in the port; a sheet body set aligned with the card slot, the The sheet set includes a plurality of sheets, each sheet supporting at least four terminals, wherein the plurality of terminals are arranged such that two rows of contacts are provided on a first side and a second side of the card slot side, the terminal tail of the sheet body group is in direct contact with a circuit board, and at least one terminal of the sheet body group has a bent shape, and the bent shape defines the at least one terminal facing the top wall. a contact end; and at least one retaining strip that secures the set of laminae together. The connector assembly of claim 14, wherein the two rows of contacts on the first side are opposite the two rows of contacts on the second side and form a front upper row of contacts, a rear upper row of contacts row of contacts, a front lower row of contacts, and a rear lower row of contacts, wherein the rear upper row of contacts and the rear lower row of contacts are vertically aligned and have pad contact portions that are offset from each other . The connector assembly of claim 14, wherein the two rows of contacts on the first side are opposite the two rows of contacts on the second side and form a front upper row of contacts, a rear upper row of contacts row of contacts, a front lower row of contacts, and a rear lower row of contacts, wherein the rear upper row of contacts is formed The terminals of the lower rear row of contacts have tails aligned between the tails of the terminals forming the upper front row of contacts and the lower front row of contacts.

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