Card edge connector with high-frequency characteristic

Abstract

The invention discloses a card edge connector with a high-frequency characteristic, which comprises an insulating body, a lower-row terminal group, an upper-row terminal group, a grounding metal shell and an upper-row communication terminal assembly, wherein the upper-row communication terminal assembly is accommodated in a lower-row terminal accommodating groove of the insulating body, and an upper-row communication terminal insulating plastic part wraps the outer sides of connecting parts of a plurality of upper-row communication terminals to form the upper-row communication terminal assembly; the conductive plastic body and the upper-row communication terminal assembly are sequentially fixed in the upper-row terminal accommodating groove of the insulating body from front to back, and the connecting part of the upper-row grounding terminal is accommodated in the upper-row grounding terminal accommodating groove on the upper-row communication terminal insulating plastic part. An upper-row grounding holding arm of the upper-row grounding terminal is fixedly inserted into an upper-row grounding terminal holding hole in the conductive plastic through an upper-row communication terminal insulating plastic part, and a grounding elastic arm on a grounding metal shell fixedly covering the outer side of the insulating body can be in elastic contact conduction with the upper-row grounding terminal. The isolation walls are formed on the periphery and the upper surface of the upper row of communication terminals, and the product has high-frequency performance.

Description

Technical Field

[0001] This invention relates to a connector, and more particularly to a card edge connector with high-frequency characteristics. Background Technology

[0002] Most existing edge connectors only have a grounding housing fixedly installed on the upper side of the connector. Grounding is achieved by the upper row of grounding terminals contacting the elastic contact arms on the grounding housing. An iron plate is assembled inside the connector's plastic body as a shield. The shield has clearance holes for the contact arms of the upper row of communication terminals and the upper row of grounding terminals to pass through. The shield separates the contact arms of the upper row of communication terminals and the upper row of grounding terminals from the connection part, thereby shielding interference signals.

[0003] This traditional edge connector has poor shielding effect against interference signals, making it difficult to meet the high-frequency signal transmission requirements of edge connectors. Summary of the Invention

[0004] To overcome the above deficiencies, the present invention provides a card edge connector with high-frequency characteristics, which can improve the shielding effect against interference signals and improve the signal transmission stability and high-frequency transmission performance of the connector.

[0005] The technical solution adopted by this invention to solve its technical problem is: a card edge connector with high-frequency characteristics, comprising an insulating body, a lower row terminal group, an upper row terminal group, and a grounding metal shell. The insulating body has left-right extending insertion slots and upper row terminal receiving slots arranged vertically at intervals. The retaining part of the lower row terminal group is fixedly installed in the lower row terminal receiving slots, and the lower row terminal contact arms of the lower row terminal group can elastically swing vertically into the insertion slots. The upper row terminal group includes upper row communication terminals, upper row grounding terminals, and upper row communication terminal insulating plastic. The upper row of communication terminals and the conductive plastic body are fixedly inserted into the upper row of communication terminal plastic parts. The upper row of communication terminals and the upper row of communication terminal plastic parts form an integral structure of upper row communication terminal assembly. The upper row of communication terminal insulating plastic parts are provided with upper row grounding terminal receiving grooves. The bottom surface of the upper row of grounding terminal receiving grooves is provided with first upper row grounding terminal contact arm clearance holes and upper row grounding terminal retaining arm clearance holes. The conductive plastic body is provided with upper row communication terminal contact arm clearance holes, second upper row grounding terminal contact arm clearance holes, and upper row grounding terminal retaining holes. The upper row of communication terminals... The insulating plastic parts, conductive plastic body, insulating body, and grounding metal shell can be fixedly connected to form an integral structure. The conductive plastic body and the insulating plastic parts of the upper row of communication terminals can be accommodated in the upper row of terminal receiving slots. The upper row of communication contact arms of the upper row of communication terminals can be elastically inserted into the card slots through the upper row of communication terminal contact arm clearance holes, and the upper row of communication contact arms of the upper row of communication terminals never contact the conductive plastic. The upper row of grounding connection parts of the upper row of grounding terminals are accommodated in the upper row of grounding terminal receiving slots on the insulating plastic parts of the upper row of communication terminals. The upper row of grounding contact arms of the upper row of grounding terminals sequentially pass through the... The upper row grounding terminal contact arm clearance hole and the second upper row grounding terminal contact arm clearance hole can be elastically inserted into the card slot. The upper row grounding holding arm of the upper row grounding terminal can be inserted into the upper row grounding terminal holding hole through the upper row grounding terminal holding arm clearance hole. The upper row grounding holding arm of the upper row grounding terminal is provided with barbs that can be embedded into the inner side wall of the upper row grounding terminal holding hole. The grounding metal shell covers the outer side of the insulating body, the upper row communication terminal insulating plastic part, and the conductive plastic body. The grounding metal shell is provided with a grounding elastic arm. The grounding elastic arm can elastically contact and conduct with the upper row grounding terminal.

[0006] As a further improvement of the present invention, an insulating plastic part receiving groove is provided on the rear side of the conductive plastic body, and the insulating plastic parts of the upper row of communication terminals can be accommodated in the insulating plastic part receiving groove. An isolation sleeve is formed on the insulating plastic parts of the upper row of communication terminals, which is fixedly covered by the root of the upper row of communication contact arms of the upper row of communication terminals. The isolation sleeve is tightly inserted into the clearance hole of the upper row of communication terminal contact arms on the conductive plastic body.

[0007] As a further improvement of the present invention, the conductive plastic body is also provided with an insulating plastic part limiting groove, and at least two limiting posts are provided at intervals on the upper row of communication terminal insulating plastic parts, and each limiting post can be fixedly inserted into the insulating plastic part limiting groove.

[0008] As a further improvement of the present invention, a plurality of first heat-melting pillars are spaced apart on the front side of the conductive plastic body, and a plurality of first heat-melting perforations are spaced apart on the bottom surface of the upper row of terminal receiving grooves of the insulating body. The plurality of first heat-melting pillars pass through the plurality of first heat-melting perforations on the insulating body respectively, and the ends of the first heat-melting pillars form a radially enlarged structure through heat fusion. The radially enlarged structure at the ends of the first heat-melting pillars abuts against the surface of the front sidewall of the insulating body.

[0009] As a further improvement of the present invention, a plurality of second and third heat-melting pillars are respectively spaced apart on the upper and rear sides of the insulating plastic parts of the upper row of communication terminals, and a plurality of fourth heat-melting pillars are spaced apart on the upper side of the insulating body. A heat-melting limiting groove is provided on the upper side of the insulating plastic part receiving groove of the conductive plastic body. The second heat-melting pillars extend to the upper side of the conductive plastic body through the heat-melting limiting groove. The grounding housing forms an L-shaped structure, and a second, third, and fourth heat-melting perforation are respectively provided on the two side walls of the L-shaped structure of the grounding housing. The subway shell is covered by an insulating body, a conductive plastic body, and an upper row of communication terminal insulating plastic parts, forming an integrated plastic structure on the upper and rear surfaces. The second, third, and fourth hot-melt pillars pass through the second, third, and fourth hot-melt holes on the subway shell, respectively. The ends of the second, third, and fourth hot-melt pillars form a radially enlarged structure through hot melting. The radially enlarged structure at the ends of the second, third, and fourth hot-melt pillars abuts against the outer surfaces of the L-shaped side walls of the subway shell.

[0010] As a further improvement of the present invention, the L-shaped structure of the grounding metal shell is provided with a plurality of first grounding elastic arms and a plurality of second grounding elastic arms on both sides of the side walls, and the insulating body is provided with grounding terminal grounding clearance holes. The first grounding elastic arms can elastically abut against the surface of the upper row grounding contact arm of the upper row grounding terminal through the grounding terminal grounding clearance holes, and the second grounding elastic arms elastically abut against the surface of the upper row grounding connection part of the upper row grounding terminal.

[0011] As a further improvement of the present invention, the L-shaped structure of the grounding metal shell is provided with a first grounding metal shell retaining arm and a second grounding metal shell retaining arm on its two side walls respectively, and the upper side and the rear side of the insulating body are provided with a first grounding metal shell retaining groove and a second grounding metal shell retaining groove respectively. The first grounding metal shell retaining arm and the second grounding metal shell retaining arm are respectively inserted into the first grounding metal shell retaining groove and the second grounding metal shell retaining groove, and the first grounding metal shell retaining arm and the second grounding metal shell retaining arm are respectively provided with barbs or buckles for fixed connection with the inner side walls of the first grounding metal shell retaining groove and the second grounding metal shell retaining groove.

[0012] As a further improvement of the present invention, the upper row of grounding terminals is a metal sheet stamping and forming structure, the upper row of communication terminals is a metal strip continuous bending forming structure, the upper row of communication terminal insulating plastic parts are integrally formed on the outside of the upper row of communication terminal connecting part by in-mold injection molding, and the upper row of communication contact arms and upper row of communication solder feet of the upper row of communication terminals extend out of the outside of the upper row of communication terminal insulating plastic parts.

[0013] As a further improvement of the present invention, the length of the welding part of the upper row grounding terminal is greater than the length of the welding part of the upper row communication terminal, and the upper row communication welding part and the upper row communication connection part of the upper row communication terminal extend out of the outer side of the insulating plastic part of the upper row communication terminal and are completely located within the upper row communication terminal solder pad of the circuit board.

[0014] As a further improvement of the present invention, the insulating body is provided with a plurality of upper row communication terminal contact arm receiving slots and upper row grounding terminal contact arm receiving slots that are connected to the card slot. The contact arms of the upper row communication terminals and the contact arms of the upper row grounding terminals extend into the card slot through the upper row communication terminal contact arm receiving slots and the upper row grounding terminal contact arm receiving slots, respectively.

[0015] The beneficial technical effects of this invention are as follows: This invention assembles a conductive plastic body within an insulating body, and inserts and fixes the retaining arm of the upper row grounding terminal to the retaining hole of the upper row grounding terminal on the conductive plastic body. Furthermore, by integrally molding an insulating plastic part for the upper row communication terminals on the outside of the upper row communication terminals, separation between the upper row communication terminals and the conductive plastic body is achieved. Since the conductive plastic can better absorb electromagnetic waves, it provides a superior shielding effect for connected machines. The impedance of the conductive plastic body can also be adjusted according to high-frequency characteristics, better matching the high-frequency characteristics of the connected components to achieve the desired high-frequency effect. The product of this invention is surrounded on the top and sides by an L-shaped grounding housing, forming an "isolation wall" around and above the upper row communication terminals of the differential pair, which can better shield the upper row communication terminals of adjacent differential pairs and the lower row terminals on the opposite side from interference, improving the high-frequency performance of the product. This invention also places the effective length of the soldering part and its connection part of the upper row communication terminals of the differential pair within the solder pads of the upper row communication terminals on the circuit board, effectively solving and eliminating signal resonance problems through high-frequency simulation. Attached Figure Description

[0016] Figure 1 This is an exploded perspective view of the present invention;

[0017] Figure 2 This is a perspective view of the upper row of communication terminal assemblies of the present invention;

[0018] Figure 3 This is a perspective view of the upper row of communication terminals of the present invention;

[0019] Figure 4 This is a perspective view of the conductive plastic body of the present invention;

[0020] Figure 5 An exploded perspective view of the conductive plastic body and the upper row of communication terminal assembly;

[0021] Figure 6 A perspective view of the electroplastic body assembled with the upper row of communication terminal components;

[0022] Figure 7 A front view of the electroplastic body assembled with the upper row of communication terminal assemblies;

[0023] Figure 8 for Figure 7 Sectional view along line AA;

[0024] Figure 9 An exploded perspective view of the electroplastic body and the insulating body assembled with the upper row of communication terminal assemblies;

[0025] Figure 10 A perspective view of the electroplastic body and insulating body assembled with the upper row of communication terminal assemblies;

[0026] Figure 11 A front view of the electroplastic body and insulating body assembled with the upper row of communication terminal assemblies;

[0027] Figure 12 for Figure 11 Sectional view along the BB direction;

[0028] Figure 13 This is an exploded perspective view of the upper row of grounding terminals in the present invention.

[0029] Figure 14 This is a perspective view of the unassembled ground housing of the present invention;

[0030] Figure 15 This is a front view of the unassembled ground housing of the present invention;

[0031] Figure 16 for Figure 15 C-axis sectional view;

[0032] Figure 17 This is an exploded perspective view of the ground housing assembly state of the present invention;

[0033] Figure 18 This is a front view of the assembly and connection of the housing of the present invention.

[0034] Figure 19 for Figure 18 Sectional view along the DD direction;

[0035] Figure 20 This is a schematic diagram illustrating the interference signal shielding principle after the ground housing of this invention is assembled.

[0036] Figure 21 This is a front view of the ground housing of the present invention;

[0037] Figure 22 This is a bottom view of the ground housing of the present invention;

[0038] Figure 23 This is a right view of the ground housing of the present invention;

[0039] Figure 24 This is a schematic diagram showing the welding positions of the upper row of communication terminals to the circuit board in this invention;

[0040] Figure 25 This is a perspective view of the present invention in use. Detailed Implementation

[0041] Example: A card edge connector with high-frequency characteristics includes an insulating body 11, a lower row terminal group 12, an upper row terminal group, and a grounding metal shell 17. The insulating body 11 has horizontally extending insertion slots and vertically spaced lower and upper row terminal receiving slots 116. The retaining portion of the lower row terminal group 12 is fixedly installed in the lower row terminal receiving slots, and the lower row terminal contact arms of the lower row terminal group 12 can elastically swing vertically into the insertion slots. The upper row terminal group includes upper row communication terminals 141, upper row grounding terminals 15, upper row communication terminal insulating plastic parts 142, and conductive plastic bodies 13. A plurality of upper row communication terminals 141 are fixed... The upper row of communication terminals 141 and the upper row of communication terminal insulating plastic parts 142 are fixedly inserted into the upper row of communication terminal insulating plastic parts 142. The upper row of communication terminal insulating plastic parts 142 are integrated into an upper row of communication terminal assembly 14. The upper row of communication terminal insulating plastic parts 142 are provided with upper row of grounding terminal receiving grooves. The bottom surface of the upper row of grounding terminal receiving grooves is provided with a first upper row of grounding terminal contact arm clearance hole and an upper row of grounding terminal 15 retaining arm clearance hole. The conductive plastic body 13 is provided with an upper row of communication terminal contact arm clearance hole 133, a second upper row of grounding terminal contact arm clearance hole 132, and an upper row of grounding terminal retaining hole 134. The upper row of communication terminal insulating plastic parts 142, conductive plastic body 13, and insulating plastic parts 142 are fixedly inserted into the upper row of communication terminal insulating plastic parts 142. The insulating body 11 and the grounding metal shell 17 can be fixedly connected to form an integral structure, and the conductive plastic body 13 and the upper row communication terminal insulating plastic part 142 can be accommodated in the upper row terminal receiving groove 116. The upper row communication contact arm 1413 of the upper row communication terminal 141 can be elastically inserted into the card slot through the upper row communication terminal contact arm clearance hole 133, and the upper row communication contact arm 1413 of the upper row communication terminal 141 never contacts the conductive plastic. The upper row grounding connection part 153 of the upper row grounding terminal 15 is accommodated in the upper row grounding terminal receiving groove on the upper row communication terminal insulating plastic part 142. The upper row grounding contact arm 152 of the upper row grounding terminal 15 sequentially passes through the first upper row The grounding terminal contact arm clearance hole and the second upper row grounding terminal contact arm clearance hole 132 can be elastically inserted into the card slot. The upper row grounding holding arm 151 of the upper row grounding terminal 15 can be inserted into the upper row grounding terminal holding hole 134 through the upper row grounding terminal 15 holding arm clearance hole. The upper row grounding holding arm 151 of the upper row grounding terminal 15 is provided with barbs that can be embedded in the inner side wall of the upper row grounding terminal holding hole 134. The grounding metal shell 17 covers the outside of the insulating body 11, the upper row communication terminal insulating plastic part 142, and the conductive plastic body 13. The grounding metal shell 17 is provided with a grounding elastic arm. The grounding elastic arm can elastically contact and conduct with the upper row grounding terminal 15.

[0042] A conductive plastic body 13 is assembled inside the insulating body 11. An insulating plastic part 142 for the upper row of communication terminals 141 is wrapped around the outside of the upper row of communication terminals 141. The upper row of communication terminals is then connected to the conductive plastic body 13 through the insertion and assembly of the insulating plastic part 142 and the upper row of communication terminals 141. The insulating plastic part 142 provides barrier insulation between the upper row of communication terminals 141 and the conductive plastic body 13. The upper row of grounding terminals 15 is fixedly connected to the conductive plastic body 13 through the upper row of grounding holding arms 151. Then, a grounding housing is covered on the outside of the insulating body 11 and the upper row of communication terminals assembly 14. The grounding elastic arm of the grounding housing is connected to the upper row of grounding terminals 15 for conduction. In this way, an "isolation wall" is formed around and on the upper row of communication terminals 141, which better shields the signal terminals of adjacent differential pairs and the terminals on the opposite side, effectively improving the high-frequency performance of the product. The conductive plastic has the characteristics of absorbing electromagnetic waves and providing excellent shielding effect. The impedance of the conductive plastic can also be adjusted according to the high-frequency characteristics requirements, so as to better match the high-frequency performance requirements of the product and achieve the required high-frequency effect.

[0043] The conductive plastic body 13 has an insulating plastic part receiving groove on its rear side. The upper row of communication terminal insulating plastic parts 142 can be accommodated in the insulating plastic part receiving groove. An isolation sleeve is formed on the upper row of communication terminal insulating plastic parts 142, which is fixedly covered to the root of the upper row of communication contact arm 1413 of the upper row of communication terminal 141. The isolation sleeve is tightly inserted into the upper row of communication terminal contact arm clearance hole 133 on the conductive plastic body 13.

[0044] The upper row of communication terminal assembly 14 is inserted into the insulating plastic part receiving groove on the rear side of the conductive plastic body 13 to achieve the plug-in assembly of the upper row of communication terminal assembly 14 and the conductive plastic body 13. The insulating plastic part 142 of the upper row of communication terminal covers the root of the upper row of communication contact arm 1413 of the upper row of communication terminal 141, which can effectively prevent the upper row of communication contact arm 1413 from contacting the conductive plastic body 13 during elastic swing.

[0045] The conductive plastic body 13 is also provided with an insulating plastic component limiting groove 136. At least two limiting posts 1422 are spaced apart on the upper row of communication terminal insulating plastic components 142, and each limiting post 1422 can be fixedly inserted into the insulating plastic component limiting groove 136. The insulating plastic component limiting groove 136 and the limiting post 1422 can be fixedly connected by interference fit or by heat fusion.

[0046] The conductive plastic body 13 has a plurality of first heat-melting pillars 135 spaced apart on its front side. The upper terminal receiving groove 116 of the insulating body 11 has a plurality of first heat-melting perforations 113 spaced apart on its bottom surface. The plurality of first heat-melting pillars 135 pass through the plurality of first heat-melting perforations 113 on the insulating body 11 respectively. The ends of the first heat-melting pillars 135 form a radially enlarged structure through heat melting. The radially enlarged structure at the ends of the first heat-melting pillars 135 abuts against the surface of the front sidewall of the insulating body 11.

[0047] After the conductive plastic body 13 is inserted into the upper terminal receiving groove of the insulating body 11, the first heat-fusion post 135 on the conductive plastic body 13 is inserted into the first heat-fusion through hole 113 on the insulating body 11. The two are fixedly connected by heat fusion to form an integral structure, so that the conductive plastic body 13 and the insulating body 11 may become loose during insertion and removal. In addition, the two can also be fixedly connected by a structure such as a snap fastener, which is also within the scope of protection of this patent.

[0048] The upper side and rear side of the upper row of communication terminal insulating plastic parts 142 are respectively provided with a plurality of second heat-melting pillars 1420 and third heat-melting pillars 1421 spaced apart. The upper side of the insulating body 11 is provided with a plurality of fourth heat-melting pillars 112 spaced apart. The upper side of the insulating plastic part receiving groove of the conductive plastic body 13 is provided with a heat-melting limiting groove 131. The second heat-melting pillars 1420 extend to the upper side of the conductive plastic body 13 through the heat-melting limiting groove 131. The grounding housing forms an L-shaped structure. The two side walls of the L-shaped structure of the grounding housing are respectively provided with second heat-melting perforations 172, third heat-melting perforations 173 and fourth heat-melting perforations 174. The grounding housing covers the insulating body 11. 1. The upper and rear surfaces of the integral plastic structure formed by the conductive plastic body 13 and the upper row of communication terminal insulating plastic parts 142, the second hot-melt pillar 1420, the third hot-melt pillar 1421 and the fourth hot-melt pillar 112 respectively pass through the second hot-melt perforation 172, the third hot-melt perforation 173 and the fourth hot-melt perforation 174 on the ground housing, the ends of the second hot-melt pillar 1420, the third hot-melt pillar 1421 and the fourth hot-melt pillar 112 form a radially enlarged structure through hot melting, and the radially enlarged structure at the ends of the second hot-melt pillar 1420, the third hot-melt pillar 1421 and the fourth hot-melt pillar 112 abuts against the outer surfaces of the L-shaped structure side walls of the ground housing. The conductive plastic body 13, the upper row of communication terminal assembly 14, and the insulating body 11 are assembled to form an integral structure. The grounding housing adopts an L-shaped structure, which covers the top and back of the connector. It is fixedly connected by several hot-melt pillars and hot-melt perforations on the top and back. On the one hand, it ensures that the grounding housing fits tightly against the upper and back sides of the plastic to prevent the grounding housing from warping. On the other hand, the grounding housing also realizes the fixed connection between the upper row of communication terminal assembly 14 and the insulating body 11.

[0049] The L-shaped structure of the grounding metal shell 17 has several first grounding elastic arms 170 and several second grounding elastic arms 171 on its two side walls. The insulating body 11 has grounding terminal grounding clearance holes 111. The first grounding elastic arms 170 can elastically abut against the surface of the upper row grounding contact arm 152 of the upper row grounding terminal 15 through the grounding terminal grounding clearance holes 111, and the second grounding elastic arms 171 elastically abut against the surface of the upper row grounding connection portion 153 of the upper row grounding terminal 15. The first grounding elastic arms 170 and the second grounding elastic arms 171 are respectively provided on the upper side and rear side of the grounding metal shell, which abut against the upper row grounding contact arm 152 and the upper row grounding connection portion 153 of the upper row grounding terminal 15, respectively, thereby improving the grounding performance of the upper row grounding terminal 15 and the contact stability between the upper row grounding terminal 15 and the electronic card.

[0050] The L-shaped structure of the grounding metal shell 17 has a first grounding metal shell retaining arm 175 and a second grounding metal shell retaining arm 176 respectively on its two side walls. The upper side and rear side of the insulating body 11 have a first grounding metal shell retaining groove 117 and a second grounding metal shell retaining groove 118 respectively. The first grounding metal shell retaining arm 175 and the second grounding metal shell retaining arm are respectively inserted into the first grounding metal shell retaining groove 117 and the second grounding metal shell retaining groove 118. The first grounding metal shell retaining arm 175 and the second grounding metal shell retaining arm 176 are respectively provided with barbs or buckles for fixed connection with the inner side walls of the first grounding metal shell retaining groove 117 and the second grounding metal shell retaining groove 118.

[0051] The upper row of grounding terminals 15 is a metal sheet stamping and forming structure, and the upper row of communication terminals 141 is a metal strip continuously bent and forming structure. The upper row of communication terminal insulating plastic parts 142 are integrally formed on the outside of the connecting part of the upper row of communication terminals 141 by in-mold injection molding. The upper row of communication contact arms 1413 and upper row of communication solder feet of the upper row of communication terminals 141 extend out of the outside of the upper row of communication terminal insulating plastic parts 142. The upper row of communication terminals 141 adopts a continuously bent structure, which can reduce residual stakes and improve high-frequency performance. The upper row of grounding terminals 15 adopts a sheet blanking structure, which can be wider than the upper row of communication terminals 141 to avoid signal interference between adjacent differential terminals on the upper row of communication terminals 141.

[0052] The length of the welded portion of the upper row grounding terminal 15 is greater than the length of the welded portion of the upper row communication terminal 141, and the portions of the upper row communication welded portion 1411 and the upper row communication connection portion 1412 of the upper row communication terminal 141 extending beyond the outer side of the upper row communication terminal insulating plastic part 142 are completely located within the upper row communication terminal pad 31 of the circuit board. With the effective length of the upper row communication welded portion 1411 and its upper row communication connection portion 1412 of the differential pair upper row communication terminal 141 placed within the upper row communication terminal pad 31 of the circuit board, high-frequency simulation can effectively solve the signal resonance problem.

[0053] The insulating body 11 is provided with several upper row communication terminal contact arm receiving slots 114 and upper row grounding terminal contact arm receiving slots 115 that are connected to the card slot. The contact arms of the upper row communication terminal 141 and the contact arms of the upper row grounding terminal 15 extend into the card slot through the upper row communication terminal contact arm receiving slots 114 and the upper row grounding terminal contact arm receiving slots 115, respectively.

Claims

1. A card edge connector with high-frequency characteristics, comprising an insulating body (11), a lower row terminal group (12), an upper row terminal group, and a grounding metal shell (17), wherein the insulating body has a left-right extending insertion slot, and the insulating body has a lower row terminal receiving slot and an upper row terminal receiving slot (116) arranged vertically at intervals, the retaining part of the lower row terminal group is fixedly installed in the lower row terminal receiving slot, and the lower row terminal contact arm of the lower row terminal group can elastically swing vertically into the insertion slot, characterized in that: The upper row terminal assembly includes an upper row communication terminal (141), an upper row grounding terminal (15), an upper row communication terminal insulating plastic part (142), and a conductive plastic body (13). A plurality of upper row communication terminals are fixedly inserted into the upper row communication terminal plastic part. The integral structure formed by the plurality of upper row communication terminals and the upper row communication terminal plastic part is an upper row communication terminal assembly (14). The upper row communication terminal insulating plastic part is provided with an upper row grounding terminal receiving groove, and a first upper row grounding terminal receiving groove is provided on the bottom surface of the upper row grounding terminal receiving groove. The conductive plastic body is provided with an upper row communication terminal contact arm clearance hole (133), a second upper row grounding terminal contact arm clearance hole (132), and an upper row grounding terminal holding hole (134). The upper row communication terminal insulating plastic part, conductive plastic body, insulating body, and grounding metal shell can be fixedly connected to form an integral structure, and the conductive plastic body and the upper row communication terminal insulating plastic part can be accommodated in the upper row terminal receiving groove. The upper row communication contact arm (1413) can be elastically inserted into the card slot through the upper row communication terminal contact arm clearance hole, and the upper row communication contact arm of the upper row communication terminal never comes into contact with the conductive plastic. The upper row grounding connection part (153) of the upper row grounding terminal is accommodated in the upper row grounding terminal receiving groove on the upper row communication terminal insulating plastic part. The upper row grounding contact arm (152) of the upper row grounding terminal can be elastically inserted into the card slot through the first upper row grounding terminal contact arm clearance hole and the second upper row grounding terminal contact arm clearance hole. The upper row of grounding terminals is inserted into the card slot with elastic swing. The upper row of grounding holding arms (151) can be inserted into the upper row of grounding terminal holding holes through the upper row of grounding terminal holding arm clearance holes. The upper row of grounding terminals has barbs that can be embedded in the inner side wall of the upper row of grounding terminal holding holes. The grounding metal shell covers the outer side of the insulating body, the upper row of communication terminal insulating plastic parts, and the conductive plastic body. The grounding metal shell has a grounding elastic arm, which can elastically contact and conduct with the upper row of grounding terminals.

2. The card edge connector with high-frequency characteristics according to claim 1, characterized in that: The conductive plastic body has an insulating plastic part receiving groove on its rear side. The insulating plastic parts of the upper row of communication terminals can be accommodated in the insulating plastic part receiving groove. An isolation sleeve is formed on the insulating plastic parts of the upper row of communication terminals, which is fixedly covered to the root of the upper row of communication contact arms. The isolation sleeve is tightly inserted into the clearance hole of the upper row of communication terminal contact arms on the conductive plastic body.

3. The card edge connector with high-frequency characteristics according to claim 1 or 2, characterized in that: The conductive plastic body is also provided with an insulating plastic part limiting groove (136), and at least two limiting posts (1422) are provided at intervals on the upper row of communication terminal insulating plastic parts, and each limiting post can be fixedly inserted into the insulating plastic part limiting groove.

4. The card edge connector with high-frequency characteristics according to claim 1 or 2, characterized in that: The conductive plastic body is provided with a plurality of first heat-melting pillars (135) spaced apart on the front side. The upper terminal receiving groove of the insulating body is provided with a plurality of first heat-melting perforations spaced apart on the bottom surface. The plurality of first heat-melting pillars pass through the plurality of first heat-melting perforations (113) on the insulating body respectively. The ends of the first heat-melting pillars form a radially enlarged structure through heat fusion. The radially enlarged structure at the ends of the first heat-melting pillars abuts against the surface of the front sidewall of the insulating body.

5. The card edge connector with high-frequency characteristics according to claim 1, characterized in that: The upper side and rear side of the insulating plastic part of the upper row of communication terminals are respectively provided with a plurality of second heat-melting pillars (1420) and third heat-melting pillars (1421) spaced apart. The upper side of the insulating body is provided with a plurality of fourth heat-melting pillars (112) spaced apart. The upper side of the insulating plastic part receiving groove of the conductive plastic body is provided with a heat-melting limiting groove (131). The second heat-melting pillars extend to the upper side of the conductive plastic body through the heat-melting limiting groove. The ground housing forms an L-shaped structure. The two side walls of the L-shaped structure of the ground housing are respectively provided with second heat-melting perforations, third heat-melting perforations and fourth heat-melting perforations. The upper and rear surfaces of the integrated plastic structure formed by the insulating body, conductive plastic body and upper row of communication terminal insulating plastic parts are covered. The second, third and fourth hot-melt pillars pass through the second hot-melt perforation (172), the third hot-melt perforation (173) and the fourth hot-melt perforation (174) on the ground housing, respectively. The ends of the second, third and fourth hot-melt pillars form a radially enlarged structure through hot melting. The radially enlarged structure at the ends of the second, third and fourth hot-melt pillars abuts against the outer surfaces of the L-shaped side walls of the ground housing.

6. The card edge connector with high-frequency characteristics according to claim 5, characterized in that: The L-shaped structure of the grounding metal shell is provided with a plurality of first grounding elastic arms (170) and a plurality of second grounding elastic arms (171) on both sides. The insulating body is provided with grounding terminal grounding avoidance holes (111). The first grounding elastic arms can elastically abut against the surface of the upper row grounding contact arm (152) of the upper row grounding terminal through the grounding terminal grounding avoidance holes, and the second grounding elastic arms elastically abut against the surface of the upper row grounding connection part of the upper row grounding terminal.

7. The card edge connector with high-frequency characteristics according to claim 5, characterized in that: The L-shaped structure of the grounding metal shell is provided with a first grounding metal shell retaining arm (175) and a second grounding metal shell retaining arm (176) on its two side walls respectively. The upper side and the rear side of the insulating body are provided with a first grounding metal shell retaining groove (117) and a second grounding metal shell retaining groove (118) respectively. The first grounding metal shell retaining arm and the second grounding metal shell retaining arm are respectively inserted into the first grounding metal shell retaining groove and the second grounding metal shell retaining groove. The first grounding metal shell retaining arm and the second grounding metal shell retaining arm are respectively provided with barbs or buckles for fixed connection with the inner side walls of the first grounding metal shell retaining groove and the second grounding metal shell retaining groove.

8. The card edge connector with high-frequency characteristics according to claim 1, characterized in that: The upper row of grounding terminals is a metal sheet stamping and forming structure, the upper row of communication terminals is a metal strip continuous bending forming structure, the upper row of communication terminal insulating plastic parts are integrally formed on the outside of the upper row of communication terminal connecting part by in-mold injection molding, and the upper row of communication contact arms and upper row of communication solder feet of the upper row of communication terminals extend out of the outside of the upper row of communication terminal insulating plastic parts.

9. The card edge connector with high-frequency characteristics according to claim 8, characterized in that: The length of the welding part of the upper row grounding terminal is greater than the length of the welding part of the upper row communication terminal, and the upper row communication welding part (1411) and the upper row communication connection part (1412) of the upper row communication terminal extend out of the outer side of the insulating plastic part of the upper row communication terminal and are completely located inside the upper row communication terminal solder pad (31) of the circuit board.

10. The card edge connector with high-frequency characteristics according to claim 1, characterized in that: The insulating body is provided with several upper row communication terminal contact arm receiving slots (114) and upper row grounding terminal contact arm receiving slots (115) that are connected to the card slot. The contact arms of the upper row communication terminals and the contact arms of the upper row grounding terminals extend into the card slot through the upper row communication terminal contact arm receiving slots and the upper row grounding terminal contact arm receiving slots, respectively.

Images