TWI621306B - Card edge connector - Google Patents

Abstract

A card edge connector includes an insulative housing and at least one terminal module. The insulating housing has an elongated shape and forms a card edge slot, and a terminal holder mounting groove that communicates with the card edge slot. The terminal module includes a terminal holder mounted in the terminal holder mounting groove, and at least one row of conductive terminals fixed side by side to the terminal holder, the conductive terminals including a ground terminal, each of the conductive terminals There is a fixing portion fixed to the terminal holder, and a spring arm portion extending from the fixing portion into the card edge slot. The terminal module further includes a common grounding shield, the common grounding shield includes a sheet body disposed on the terminal holder, and a plurality of elastic arms extending from the sheet body and respectively abutting the grounding terminals The grounding arm of the part.

Description

Card edge connector

The present invention relates to a connector, and more particularly to a card edge connector.

In general, when the electrical connector is used to transmit high-frequency signals, crosstalk is easily generated between the terminals and the terminals, which means that the two signal lines are inductively and capacitively coupled due to the spatial distance. Interfere with each other, and this interference will affect the transmission of the signal.

Chinese Patent Application No. CN200620003253.5 (corresponding to US Pat. No. 7,114, 963, hereinafter referred to as prior art 1) discloses an electrical connector having a contact holding module in which a plurality of contacts (terminals) are embedded, and The outer casing of the module is held by a fixed contact. Chinese Patent Application No. CN201510196516.2 (corresponding to U.S. Patent No. US9166317, hereinafter referred to as prior art 2) discloses a high speed electrical connector which discloses the use of a housing having a reference surface and a pressing rib to secure the contact assembly. technology. However, the prior art 1 and the prior art 2 described above do not disclose a technique of reinforcing the grounding characteristics by using a metal grounding member to enhance the grounding characteristics of the high frequency signal. Chinese Patent Application No. CN96180150.6 (corresponding to U.S. Patent No. US6019616, hereinafter referred to as prior art 3) discloses a metal grounded cover covering the outer casing of the connector, and through the grounding lead through the hole for elastically The configuration in which the intermediate portion of the connector terminal contacts, but the intermediate portion of the connector terminal in the prior art 3 is fixed, and the connection between the free end of the ground lead member and the intermediate portion of the connector terminal depends only on the elasticity of the ground lead member Force, if the grounding lead is elastically fatigued or deformed, resulting in poor contact, the effect of the grounding shield is reduced, and in some configurations, a stronger and more comprehensive grounding shield is required to improve the transmission speed of the high frequency signal. .

Accordingly, it is an object of the present invention to provide a card edge connector that can effectively improve crosstalk.

Thus, in some embodiments, the card edge connector of the present invention includes an insulative housing and at least one terminal module. The insulating housing has an elongated shape extending along a length direction, and the insulating housing includes a plug surface on a opposite side and a mounting surface, a card edge slot opening toward the plug surface, and an opening a terminal holder mounting groove facing the mounting surface and communicating with the card edge slot, the insulative housing further comprising two extending along the length direction to collectively define the card edge slot and the terminal holder mounting slot Side wall. The at least one terminal module includes a terminal holder extending along the length direction and mounted in the terminal holder mounting groove, and at least one row of conductive wires fixed to the terminal holder at intervals along the length direction a terminal, the conductive terminal includes a signal terminal and a ground terminal, each conductive terminal has a fixing portion fixed to the terminal holder, a spring arm portion extending from the fixing portion to the card edge slot, and a self-elastic arm portion a contact portion extending at an end and extending into the card edge slot, and a tail portion extending from the fixing portion to the mounting surface of the insulative housing. The terminal module further includes at least one common ground shield, the common ground shield includes a sheet extending along the length direction and disposed between the terminal holder and the sidewall of the insulating housing, and a plurality of The body extends toward the mating surface and respectively corresponds to a grounding elastic arm of the grounding terminal, and each of the grounding elastic arms has an elastic portion extending upward from the sheet body, and an elastic portion extending upward from the elastic portion The abutting portion elastically abuts against the opposite outer side surface of the corresponding arm portion of the corresponding ground terminal toward the corresponding side wall direction.

In some implementations, the terminal module includes two rows of conductive terminals that are opposite to each other and fixed to the terminal holder, and two common ground shields, and the sheets of the common ground shields are respectively disposed at the terminals. Between the retaining seat and the side wall of the corresponding insulating housing.

In some embodiments, the terminal holder has two terminal holders that are mounted in the terminal holder mounting groove, and the two rows of conductive terminals are respectively fixed to the terminal holders. The shields are respectively disposed on the corresponding terminal holders and between the corresponding terminal holders and the sidewalls of the insulating housing.

In some embodiments, each row of conductive terminals is composed of a plurality of signal terminal pairs and a plurality of ground terminals, and the signal terminal pairs are staggered with the ground terminals.

In some implementations, the terminal holder has a mounting surface for the body of the common grounding shield, and a first positioning structure formed on the mounting surface, the body of each common grounding shield A second positioning structure is formed to cooperate with the first positioning structure to be fixed to the terminal holder.

In some implementations, the first positioning structure includes at least one positioning protrusion, and the second positioning structure includes at least one positioning hole that cooperates with the positioning protrusion.

In some implementations, the first positioning structure includes a positioning rib formed at a top of the mounting surface of the terminal holder and extending along a length direction, the second positioning structure including a top portion of the sheet body and And a positioning surface matched with the positioning rib, the terminal holder further forming a plurality of grooves respectively for the grounding elastic arms to pass through the positioning rib.

In some embodiments, the first positioning structure further includes at least one fastening block formed on the mounting surface, the second positioning structure further comprising at least one notch matching the fastening block, the insulating housing has And forming at least one fastening hole formed at an inner wall surface of the terminal holder mounting groove and fastened to the fastening block of the terminal holder.

In some embodiments, the insulating housing is further formed with a plurality of ribs protruding from an inner wall surface defining the terminal holder mounting groove, the ribs for pressing against the at least one terminal module The terminal holder and the at least one common grounding shield.

In some embodiments, the insulative housing includes a plurality of dividing ribs disposed at the card edge slots adjacent to the terminal holder mounting slots and spaced side by side along the lengthwise direction.

In some embodiments, the insulating housing further defines a plurality of terminal receiving slots respectively corresponding to the conductive terminals at the inner wall surface defining the card edge slot, and the plurality of corresponding receiving spaces respectively The grounding arm of the grounding arm is accommodating.

The present invention has at least the following effects: by abutting the common grounding shield connected to the grounding terminals, the grounding characteristics are enhanced to create a shielding function between the signal terminals, and by grounding each of the common grounding shields The elastic arm elastically abuts against the outer side surface of the elastic arm portion of the corresponding grounding terminal, and can increase the positive contact force between the grounding terminal and the docking target and the grounding terminal and the grounding when the mating connector is inserted into the card edge connector The contact force between the elastic arms enables the above three to be surely and stably contacted to ensure that the shielding effect of the common grounding shield can be continuously maintained in a stable state, thereby improving crosstalk.

Referring to FIG. 1 to FIG. 4, an embodiment of the card edge connector 10 of the present invention is applicable to a circuit board (not shown) and is provided for a pair of interfaces (not shown). Inserting, so that the pair of contacts are electrically connected to the circuit board. In the embodiment, the pair of contacts is an electronic card, such as a memory card, a graphics card, or the like. The card edge connector 10 includes an insulative housing 1 and at least one terminal module 2; it should be noted that the present embodiment includes two sets of terminal modules 2, and in other implementations, the number of the terminal modules 2 may be Change, not limited by this.

The insulative housing 1 has an elongated shape extending along a length direction D1. The insulative housing 1 includes a mating surface 1a and a mounting surface 1b on opposite sides, and an opening faces the mating surface 1a and is used for a card edge slot 11 for the pair of contacts, and a terminal holder mounting slot 12 opening toward the mounting surface 1b and communicating with the card edge slot 11, the insulative housing 1 further including along the length direction D1 extends to collectively define the card edge slot 11 and the two side walls 1c of the terminal holder mounting slot 12. In this embodiment, the insertion surface 1a and the mounting surface 1b are opposed to each other in an up-and-down direction D2 perpendicular to the longitudinal direction D1. In addition, in the embodiment, the insulating housing 1 further has a plurality of a plurality of positioning holes (not shown) disposed on the mounting surface 1b for positioning the card edge connector 10, and a plurality of plate positioning posts 13 for positioning the card edge connector 10, and a plurality of holes for piercing and soldering A plurality of fixing holes (not shown) of the circuit board are used to fix the card edge connector 10 to the board fixing member 14 of the circuit board, but are not limited thereto.

Referring to FIG. 5, in more detail, the insulative housing 1 of the present embodiment further has a positioning separation extending from a center of the card edge slot 11 along a width direction D3 perpendicular to the length direction D1. a portion 15 and the positioning partition 15 extends downwardly to the terminal holder mounting groove 12 adjacent to the mounting surface 1b of the insulative housing 1, the positioning partition 15 for positioning the pair of contacts, the positioning partition 15 The card edge connector 10 is divided into two card edge slots 11 and two terminal holder mounting slots 12 for respectively mounting the two terminal modules 2; however, in other embodiments, the insulative housing 1 It is also possible to have no positioning partition 15 and is not limited thereto. In addition, for the sake of clarity in the following description of the present embodiment, a description will be made by taking a card edge slot 11, a terminal holder mounting groove 12, and a terminal module 2 as an example. Further, in the present embodiment, one of the plate fixing members 14 is located at the bottom of the positioning partition portion 15.

Referring to FIG. 6 to FIG. 9, each terminal module 2 includes a terminal holder 20 extending along the length direction D1 and installed in the terminal holder mounting groove 12, and at least one row is spaced side by side along the length direction D1. The plurality of conductive terminals 22 are fixed to the terminal holder 20. In this embodiment, the terminal module 2 is a conductive terminal 22 including two rows opposite to each other and fixed to the terminal holder 20, and the terminal holder 20 has two mutually mounted devices mounted on the terminal holder. A terminal holder 21 in the slot 12, the two rows of conductive terminals 22 are respectively fixed to the terminal holders 21. In a variant embodiment, the terminal holder 20 can also be of a structure that is non-detachable and that holds the two rows of conductive terminals 22. In another variation, the terminal module 2 may have only one row of conductive terminals 22 fixed to the terminal holder 20 that is not detachable, which is not limited by this embodiment. In addition, it should be noted that the conductive terminal 22 of the present embodiment is embedded and fixed in the corresponding terminal holder 21 by insert molding, but is not limited thereto. The conductive terminals 22 include a signal terminal 221 and a ground terminal 222. In this embodiment, each row of conductive terminals 22 is composed of a plurality of signal terminal pairs (each signal terminal pair is composed of two signal terminals 221, for example, The differential signal terminal pair is formed with a plurality of ground terminals 222, and the signal terminal pairs are staggered with the ground terminals 222. Each of the conductive terminals 22 has a fixing portion 223 fixed to the terminal holder 21 of the terminal holder 20, a spring arm portion 224 extending upward from the fixing portion 223 to the card edge slot 11, and a self-elastic arm portion 224. The end portion 225 extends into the card edge slot 11 for abutting the pair of contacts, and a tail portion 226 extending downward from the fixing portion 223, the tail portion 226 extending to the mounting surface 1b of the insulative housing 1 And the end is bent toward the outside. In the embodiment, the tail portion 226 is used for surface soldering to the circuit board to electrically connect the conductive terminal 22 to the circuit board. In one embodiment, the tail portion 226 can be a perforated weld foot or a pin-eye press fit foot.

Referring to FIG. 3 and FIG. 4 , in the embodiment, each terminal module 2 is installed in the terminal holder mounting groove 12 from the opening of the mounting surface 1 b , and is the terminal when the terminal module 2 is installed. The contact portion 225 of the conductive terminal 22 of the module 2 faces upward, and the two terminal holders 21 are pushed into the terminal holder mounting groove 12 in parallel with each other, so that the contact portion 225 of each of the conductive terminals 22 extends into the card. The two rows of conductive terminals 22 of each terminal module 2 are opposite to each other for contacting the conductive pads or the conductive traces on the two sides of the opposite target in the width direction D3 when the opposite terminals are inserted (Fig. Not shown). In the present embodiment, the insulative housing 1 further has a plurality of fastening holes 16 formed at an inner wall surface defining the terminal holder mounting groove 12, and each terminal holder 21 of the terminal holder 20 has a mounting The cover 210 and the two fastening blocks 211 are disposed on the mounting surface 210. When the terminal module 2 is pushed into the terminal holder mounting slot 12, the fastening block 211 is fastened to the corresponding fastening hole 16 Further, the two terminal holders 21 of the terminal modules 2 can be fixed to each other in the terminal holder mounting groove 12, and, in more detail, in the present embodiment, the fastening holes 16 are The sidewall 1c of the insulating housing 1 is formed penetratingly, but not limited thereto. In addition, referring to FIG. 4 and FIG. 5, in the embodiment, the insulating housing 1 is further formed with a plurality of ribs 17 protruding from the inner wall surface defining the terminal holder mounting groove 12, and the ribs 17 are Pressing the terminal holder 21 for pressing against the terminal modules 2 to increase the holding force of the insulating housing 1 to the terminal modules 2, as shown in FIG. 4 and FIG. A plurality of ribs 17 are provided on the four inner wall surfaces of the terminal holder mounting groove 12, but a plurality of ribs may be provided only on the two inner wall surfaces defining the longitudinal direction D1 of the terminal holder mounting groove 12. 17, should not be limited to this embodiment.

Referring to FIG. 6 to FIG. 9 , the terminal module 2 further includes at least one common grounding shield 3 . The at least one common grounding shield 3 includes a terminal holder 20 extending along the length direction D1 and disposed on the corresponding terminal holder 20 . The sheet body 31 between the side walls 1c of the body 1 and a plurality of grounding elastic arms 32 extending from the sheet body 31 toward the mating surface 1a and correspondingly corresponding to the grounding terminal 222. In this embodiment, the terminal module 2 includes two common grounding shields 3, and the two common grounding shields 3 are respectively disposed on the terminal holder 20 and the two side walls 1c of the corresponding insulating housing 1. More specifically, the two common grounding shields 3 are respectively disposed on the mounting faces 210 of the corresponding two terminal holders 21 and are located corresponding to the corresponding terminal holders 21 and the insulating housing 1. Between the side walls 1c. Each of the terminal holders 21 has a first positioning structure 212 formed on the mounting surface 210. The body 31 of each of the common grounding shields 3 is formed with a second positioning structure 311 that cooperates with the first positioning structure 212. The corresponding terminal holder 21 in the terminal holder 20 is relatively fixed. The first positioning structure 212 includes three positioning protrusions 212a formed on the mounting surface 210 of the terminal holder 21 at intervals in the longitudinal direction D1, and a terminal holder 21 is formed in the terminal holder 21 in more detail. a positioning rib 212b extending at a top of the mounting surface 210 and extending along the length direction D1, and the two fastening blocks 211 located at the mounting surface 210, the second positioning structure 311 comprising three formed on the sheet The body 31 is opposite to the positioning hole 311a at the positioning of the protrusion 212a and engaging with the positioning protrusion 212a, a positioning surface 311b located at the top of the sheet body 31 and being constrained by the positioning rib 212b, and two forming the sheet body A notch 311c at the bottom of the 31 and correspondingly corresponding to the fastening block 211. In addition, each of the terminal holders 21 is formed with a plurality of recesses 213 respectively for the grounding elastic arms 32 to pass through the positioning ribs 212b. With the above structure, each of the common grounding shields 3 can be positioned correspondingly. The terminal holder 21 of the terminal module 2 is reinforced to limit the grounding elastic arms 32 to correspond to the positions of the grounding terminals 222. In addition, in this embodiment, the common grounding shields 3 are positioned on the mounting surface 210 before the terminal module 2 enters the terminal holder mounting groove 12 of the insulating housing 1 . Therefore, each common grounding shield 3 is matched with the first positioning structure 212 of the terminal holder 21 by the second positioning structure 311 on the sheet body 31, and is mounted on the terminal holder 20 of the terminal module 2 After the terminal holder mounting groove 12 is inserted, the sheet body 31 is interposed between the mounting surface 210 of the corresponding terminal holder 21 and the corresponding side wall 1c of the insulating housing 1 to be fixed, but in other embodiments The sheet body 31 of the common grounding shield 3 may be directly fixed to the mounting surface 210 of the corresponding terminal holder 21 via other connection methods, and is not limited thereto. It should be noted that the ribs 17 (see FIG. 5) of the insulative housing 1 are used for pressing against the terminal holders 21 of the terminal modules 2 except for the two ends of the length direction D1. In addition, the two sides of the length direction D1 are used to firmly abut the sheets 31 of the common grounding shields 3 to simultaneously strengthen the insulating housing 1 and the common terminal modules 2 and the grounding The holding force of the shield 3.

Each of the grounding elastic arms 32 has an elastic portion 321 extending upward from the sheet body 31, and an abutting portion 322 extending upward from the elastic portion 321 . The abutting portion 322 elastically abuts against the corresponding ground. The grounding characteristics of the card edge connector 10 can be enhanced by abutting the common grounding shield 3 connected to the grounding terminals 222 on the opposite outer side faces of the elastic arm portions 224 of the terminals 222 toward the corresponding side walls 1c. The shielding effect between the signal terminals 221 is generated. If more specifically, the sheet 31 of the common grounding shield 3 is used to generate a substantial shielding effect, and the common grounding shield 3 is used for the adjacent grounding elastic arms 32. A virtual shielding effect is created to reduce the crosstalk between the signal terminals 221, and since the mating slots are inserted into the card edge slot 11, they will abut the contact portions 225 of the conductive terminals 22 and enable such The elastic arm portion 224 of the conductive terminal 22 is deformed to move toward the corresponding side wall 1c, so that each of the grounding elastic arms 32 of the common grounding shield 3 elastically abuts against the elastic arm portion 224 of the corresponding grounding terminal 222. On the opposite side, the insertion of the opposite connector When the connector 10 is edged, the positive contact force between the ground terminal 222 and the opposite connector and the contact force between the ground terminal 222 and the grounding spring arm 32 are increased, so that the above three can be surely and firmly contacted to ensure the total The shielding effect of the ground shield 3 can be continuously maintained in a stable state, thereby improving crosstalk.

Referring to FIG. 9 to FIG. 12 , in addition, in the embodiment, the insulating housing 1 further defines a plurality of terminal capacities respectively corresponding to the conductive terminals 22 at the inner wall surface defining the card edge slot 11 . The slot 18a and the plurality of grounding arm receiving slots 18b respectively accommodating the grounding elastic arms 32, the terminal receiving slots 18a and the grounding elastic arm receiving slots 18b are substantially along the width direction D3 Forming, the terminal receiving groove 18a and the grounding elastic arm receiving groove 18b can elastically flex the conductive terminals 22 and the grounding elastic arms 32 along the width direction D3, respectively, to ensure Each of the conductive terminals 22 is electrically connectable to a corresponding contact of the pair of contacts, and ensures that each of the grounded spring arms 32 is in contact with the corresponding ground terminal 222.

Referring to FIGS. 13 to 16, further, in the present embodiment, the insulative housing 1 further includes a plurality of the card edge slots 11 adjacent to the terminal holder mounting slots 12 and spaced apart from each other along the length direction D1. The partition ribs 19 are arranged side by side, and the partition ribs 19 are used to limit the insertion depth of the pair of joints. In the present embodiment, each of the partition ribs 19 is substantially U-shaped with an opening facing upward, and the width of the upward opening thereof can be used to strengthen the position of the pair of contacts in the width direction D3. In addition, in the embodiment, the bottom of the partition ribs 19 is abutted against the terminal holder 20 of the corresponding terminal module 2 to strengthen the limit of the insulating module 1 to the terminal module 2, but in other In an embodiment, the insulating housing 1 can limit the terminal holder 20 of the terminal module 2 only by the step difference between the card edge slot 11 and the terminal holder mounting groove 12.

In summary, the card edge connector 10 of the present invention strengthens the grounding characteristic by abutting the common grounding shield 3 connected to the grounding terminals 222 to generate a shielding function between the signal terminals 221, and Each grounding elastic arm 32 of the common grounding shield 3 elastically abuts against the opposite outer side surface of the elastic arm portion 224 of the corresponding grounding terminal 222, and can increase the grounding terminal when the opposite connector is inserted into the card edge connector 10. The positive contact force between the 222 and the counter interface and the contact force between the ground terminal 222 and the grounding spring arm 32 enable the above three to be surely and firmly contacted to ensure that the shielding effect of the common grounding shield 3 can be continued. By maintaining the steady state and thereby improving the crosstalk phenomenon, the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

10‧‧‧ card edge connector
1‧‧‧Insulated housing
1a‧‧‧Interface
1b‧‧‧ mounting surface
1c‧‧‧ side wall
11‧‧‧ card edge slot
12‧‧‧Terminal retainer mounting slot
13‧‧‧ board positioning column
14‧‧‧ board fixtures
15‧‧‧ Positioning partition
16‧‧‧Snap holes
17‧‧‧ rib
18a‧‧‧Terminal receiving slot
18b‧‧‧ Grounding arm receiving groove
19‧‧‧ partition ribs
2‧‧‧Terminal module
20‧‧‧ terminal holder
21‧‧‧Terminal holders
210‧‧‧Installation surface
211‧‧‧Snap block
212‧‧‧First positioning structure
212a‧‧‧Positioning lugs
212b‧‧‧ positioning ribs
213‧‧ ‧ Groove
22‧‧‧Electrical terminals
221‧‧‧ Signal Terminal
222‧‧‧ Grounding terminal
223‧‧‧ fixed department
224‧‧‧Bounce arm
225‧‧‧Contacts
226‧‧‧ tail
3‧‧‧Common grounding shield
31‧‧‧Sheet
311‧‧‧Second positioning structure
311a‧‧‧Positioning holes
311b‧‧‧ positioning surface
311c‧‧ ‧ gap
32‧‧‧ Grounding arm
321‧‧‧Flexible Department
322‧‧‧Abutment
D1‧‧‧ length direction
D2‧‧‧Up and down direction
D3‧‧‧Width direction

BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the present invention will be apparent from the embodiments of the present invention, wherein: Figure 1 is a perspective view of an embodiment of the card edge connector of the present invention; Figure 3 is an exploded perspective view of Figure 1; Figure 4 is an exploded perspective view of Figure 2; Figure 5 is a perspective view of the insulative housing of the embodiment; Figure 6 is a perspective view of the embodiment Figure 7 is an exploded perspective view showing a portion of one of the terminal modules; Figure 8 is a front view of the embodiment; Figure 9 is a view taken along line IX-IX of Figure 8 Figure 10 is a front exploded view of Figure 8; Figure 11 is a cross-sectional view taken along line XI-XI of Figure 10; Figure 12 is a partially enlarged perspective view showing the terminal capacity of the insulative housing of the embodiment Figure 13 is a cross-sectional view taken along line XIII-XIII of Figure 10; Figure 14 is a plan view of the embodiment; Figure 15 is taken along the line XV-XV of Figure 14. a cross-sectional view; and FIG. 16 is a perspective view illustrating the insulating housing of the embodiment Ribs.

Claims (11)

A card edge connector comprising: an insulative housing having an elongated shape extending along a length direction, the insulative housing comprising a plug surface on opposite sides and a mounting surface, an opening facing the mating surface a card edge slot, and a terminal holder mounting slot opening toward the mounting surface and communicating with the card edge slot, the insulative housing further including extending along the length to collectively define the card edge slot and The terminal holder has two side walls of the mounting groove; and at least one terminal module includes a terminal holder extending along the length direction and installed in the terminal holder mounting groove, and at least one row is spaced along the length direction And a plurality of conductive terminals fixed to the terminal holder, the conductive terminals include a signal terminal and a ground terminal, each conductive terminal has a fixing portion fixed to the terminal holder, and a flange extending from the fixing portion to the card edge a spring portion of the slot, a contact portion extending from the end of the elastic arm portion and extending into the card edge slot, and a tail portion extending from the fixing portion to the mounting surface of the insulating body, wherein the terminal The group further includes at least a common grounding shield, the common grounding shield comprising a sheet extending along the length direction and disposed between the terminal holder and the sidewall of the insulating housing, and a plurality of sheets from the sheet body a grounding elastic arm extending at a position corresponding to a grounding terminal, each of the grounding elastic arms having an elastic portion extending upward from the sheet body and an abutting portion extending upward from the elastic portion, The abutting portion elastically abuts against the corresponding outer side surface of the corresponding grounding terminal of the corresponding grounding terminal toward the corresponding side wall direction. The card edge connector of claim 1, wherein the terminal module comprises two rows of conductive terminals opposite to each other and fixed to the terminal holder, and two common ground shields, the common ground shields The sheets are respectively disposed between the terminal holder and the sidewall of the corresponding insulating housing. The card edge connector of claim 2, wherein the terminal holder has two terminal holders that are mounted in the terminal holder mounting groove, and the two rows of conductive terminals are respectively fixed to the terminals. The holding members are respectively disposed on the corresponding terminal holders and between the corresponding terminal holders and the sidewalls of the insulating housing. The card edge connector of claim 3, wherein each row of conductive terminals is composed of a plurality of signal terminal pairs and a plurality of ground terminals, and the signal terminal pairs are staggered with the ground terminals. The card edge connector of any one of claims 1 to 4, wherein the terminal holder has a mounting surface for the sheet of the common grounding shield, and a mounting surface formed on the mounting surface The first positioning structure, the body of each of the common grounding shields is formed with a second positioning structure that cooperates with the first positioning structure to be fixed to the terminal holder. The card edge connector of claim 5, wherein the first positioning structure comprises at least one positioning protrusion, and the second positioning structure comprises at least one positioning hole that cooperates with the positioning protrusion. The card edge connector of claim 5, wherein the first positioning structure comprises a positioning rib formed at a top of the mounting surface of the terminal holder and extending along a length direction, the second positioning structure comprising A positioning surface located at the top of the sheet body and engaging with the positioning rib, the terminal holder further forming a plurality of grooves respectively for the grounding elastic arms to pass through the positioning rib. The card edge connector of claim 6, wherein the first positioning structure further comprises at least one fastening block formed on the mounting surface, the second positioning structure further comprising at least one matching with the fastening block. The insulative housing has at least one fastening hole formed at an inner wall surface defining the terminal holder mounting groove and being fastened to the fastening block of the terminal holder. The card edge connector according to any one of claims 1 to 4, wherein the insulating housing is further formed with a plurality of ribs protruding from an inner wall surface defining the terminal holder mounting groove, the ribs And a terminal holder for pressing against the at least one terminal module and at least one common grounding shield. The card edge connector of any one of claims 1 to 4, wherein the insulative housing includes a plurality of the card edge slots abutting the terminal holder mounting groove and spaced apart from each other along the length direction Separated ribs arranged side by side. The card edge connector of any one of claims 1 to 4, wherein the insulating housing further defines a plurality of terminals respectively corresponding to the conductive terminals at an inner wall surface defining the card edge slot. The accommodating groove and the plurality of grounding elastic arm accommodating grooves respectively accommodating the grounding elastic arms.