A shielded board-to-board connector assembly

Abstract

The application discloses a shielding type board-to-board connector assembly, which comprises a male seat connector and a female seat connector. The male seat connector is composed of a male insulating base, a male seat signal terminal group and a male seat shielding shell, the male insulating base has a second insulating wall body recessed towards a slot, and the male seat signal terminals are embedded on the second insulating wall body at equal intervals. The female seat connector comprises a female insulating base, a female seat signal terminal group, a female seat shielding shell and a middle island shielding shell, the female insulating base comprises a second long side wall body protruding towards a middle island structure, and the female seat signal terminals are embedded between the second long side wall body and the middle island structure at equal intervals. By embedding the male and female seat signal terminals on the recessed insulating base, combining the closed-loop shielding layout formed by the mutual contact of the female seat shielding shell, the male seat shielding shell and the middle island shielding shell and the multi-point contact mode, the whole protection around the signal transmission path and the multi-layer electromagnetic interference suppression can be formed, and the electromagnetic interference resistance of the connector is improved.

Description

Technical Field

[0001] This invention belongs to the field of electrical connector technology, and particularly relates to a shielded board-to-board connector assembly. Background Technology

[0002] Board-to-board (BTO) connectors are common connecting components in electronic products, widely used in various electronic devices such as mobile phones, tablets, and digital cameras. Their function is to establish an electrical connection between two circuit boards. They mainly consist of two parts: a female connector and a male connector. The female connector is typically soldered onto one circuit board, while the male connector is soldered onto another. Both the female and male connectors have a corresponding number of conductive terminals for transmitting electronic signals and power. By plugging in the female and male connectors, a communication connection between the two circuit boards can be achieved.

[0003] However, as mobile phones evolve towards thinner, lighter, more multifunctional, and higher-performance designs, the performance and quality requirements for mobile phone connectors are becoming increasingly stringent, driving continuous upgrades in connector pin spacing, materials, and functions. Among these, radio frequency (RF) connectors, as fundamental components, are facing ever-increasing demands from terminal manufacturers for high-frequency transmission rates and shielding effectiveness. These stringent requirements necessitate the use of more parts and more complex manufacturing processes, significantly increasing connector costs and production complexity.

[0004] Traditional board-to-board connectors mostly adopt a split metal shell structure, with the signal terminals aligned with the shielding shell without inward retraction. The signal terminals are exposed at the edge of the shielding cavity, which cannot form a multi-layer shielding effect, making high-frequency signals susceptible to external electromagnetic interference. Furthermore, the male and female connector shielding shells adopt a split structure assembled from multiple parts, resulting in uneven contact impedance and the inability to form a continuous conductive circuit to suppress electromagnetic radiation leakage. Summary of the Invention

[0005] The purpose of this invention is to provide a shielded board-to-board connector assembly that further improves the connector's electromagnetic interference resistance while ensuring that the connector structure is simple, reliable, and easy to manufacture.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A shielded board-to-board connector assembly includes a male connector and a pluggable female connector. The male connector includes: a male insulating base having a pair of opposing short-side insulators, a pair of long-side insulators, and a central rectangular slot formed by the long-side insulators and the short-side insulators; the long-side insulators include a first insulating wall and a second insulating wall recessed toward the central rectangular slot; a male connector signal terminal group including a plurality of male connector signal terminals equally spaced and embedded in the second insulating wall, each male connector signal terminal having: a first contact portion covering the outside of the second insulating wall, a second contact portion covering the inside of the second insulating wall, and a male connector terminal solder foot extending horizontally to the bottom of the male insulating base; and a male connector shielding shell including an outer shield portion fully covering the outside of the short-side insulators and the first insulating wall, a top shield portion covering the top surface of the short-side insulators and the first insulating wall, an inner shield portion covering the inside of the first insulating wall, and a male connector grounding solder foot extending horizontally outward from the lower end of the outer shield portion.

[0008] Further, the female connector includes: a female insulating base having a pair of oppositely arranged short side walls, a pair of long side walls, and a central island structure located in the middle of the female insulating base and protruding upwards; the long side walls include a first long side wall and a second long side wall protruding towards the central island structure; the female connector signal terminal group includes female connector signal terminals corresponding to the number of male connector signal terminals; the female connector signal terminal includes a fixing part embedded in the second long side wall, a first elastic arm bent downwards from the top of the fixing part, a female connector terminal solder foot bent outwards from the bottom of the fixing part, and a second elastic arm bent towards the central island from the bottom of the first elastic arm. The first elastic arm and the second elastic arm form an opposing contact structure; the female base shielding shell includes a top wall shielding portion covering the top of the female insulating substrate, an inner wall shielding portion covering the inner surface of the short side wall and the inner surface of the long side wall, an outer wall shielding portion covering the outer surface of the short side wall and the outer surface of the long side wall, and a first female base grounding solder foot extending downward from the outer wall shielding portion; the central island shielding shell includes a cap portion covering both ends of the central island structure, a grounding plate extending from the cap portion to the short side wall, a second female base grounding solder foot extending outward from the grounding plate portion, and a first female base grounding terminal provided on both sides of the grounding plate and extending upward.

[0009] Furthermore, the caps at both ends of the island structure are integrally connected by an island armor, and the island armor partially covers the side of the island structure away from the female signal terminal.

[0010] Furthermore, the bottom of the central island armor is provided with multiple second female grounding terminals that extend towards the first long side wall and bend upwards.

[0011] Furthermore, the bottom of the inner wall shielding portion on the inner side of the first long side wall is formed with a plurality of third female grounding terminals that extend toward the direction of the central island structure and bend upward.

[0012] Furthermore, the outer shielding part of the male seat shielding shell is provided with a first fastening groove, and the corresponding inner wall shielding part of the female seat shielding shell is provided with a first fastening protrusion.

[0013] Furthermore, the outer wall of the central island armor is provided with a second fastening protrusion that cooperates with the second fastening groove of the inner shielding part of the male seat shielding shell.

[0014] Furthermore, the outer wall shielding part has a welding foot lead-out opening at the bottom of the corresponding second long side wall.

[0015] Furthermore, the feature is that: the male connector signal terminal group and the male connector shielding shell are integrated with the male insulating substrate using a metal material through an insert molding process; the central island shielding shell and the female connector shielding shell are integrated with the female insulating substrate using a metal material through an insert molding process.

[0016] Compared with the prior art, the beneficial technical effects of the shielded board-to-board connector assembly provided by the present invention are as follows:

[0017] This invention utilizes a continuous interlocking design between the male and female shielding shells and the central island shielding shell to form a three-tiered progressive shielding structure, achieving multi-layered electromagnetic interference suppression while ensuring structural compactness. The male and female signal terminals are recessed into a recessed insulating substrate, forming a shielded space. Combined with the closed-loop layout of the central island shielding shell, this creates full-circumference protection around the signal transmission path, significantly reducing high-frequency signal crosstalk. The innovative use of integrated male and female shielding shells and the central island shielding shell, along with a multi-point equipotential bonding network established by a mechanical interlocking mechanism, simplifies assembly and enhances grounding reliability, achieving comprehensive optimization of electromagnetic compatibility, structural strength, and production economy within a miniaturized space.

[0018] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a shielded board-to-board connector assembly when the male connector and female connector are mated, according to Embodiment 1 of the present invention.

[0021] Figure 2This is a cross-sectional view of the male connector and female connector mating in a shielded board-to-board connector assembly provided in Embodiment 1 of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of a shielded board-to-board connector assembly when the male connector and the female connector are separated, according to Embodiment 1 of the present invention.

[0023] Figure 4 This is a schematic diagram of the male connector in a shielded board-to-board connector assembly provided in Embodiment 1 of the present invention;

[0024] Figure 5 This is a cross-sectional view of the male connector in a shielded board-to-board connector assembly provided in Embodiment 1 of the present invention;

[0025] Figure 6 This is an exploded view of the male connector in a shielded board-to-board connector assembly provided in Embodiment 1 of the present invention;

[0026] Figure 7 This is a schematic diagram of the female connector in a shielded board-to-board connector assembly according to Embodiment 1 of the present invention;

[0027] Figure 8 This is a cross-sectional view of the female connector in a shielded board-to-board connector assembly provided in Embodiment 1 of the present invention;

[0028] Figure 9 This is an exploded view of the female connector in a shielded board-to-board connector assembly according to Embodiment 1 of the present invention;

[0029] Figure 10 This is a schematic diagram of the bottom structure of the female connector in a shielded board-to-board connector assembly provided in Embodiment 1 of the present invention;

[0030] Figure 11 This is a schematic diagram of the structure of the island shielding shell of the female connector in a shielded board-to-board connector assembly provided in Embodiment 1 of the present invention;

[0031] Figure 12 This is a schematic diagram of the female connector in a shielded board-to-board connector assembly according to Embodiment 2 of the present invention;

[0032] Figure 13 This is a cross-sectional view of the female connector in a shielded board-to-board connector assembly according to Embodiment 2 of the present invention;

[0033] Figure 14 This is an exploded view of the female connector in a shielded board-to-board connector assembly provided in Embodiment 2 of the present invention.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1-Male insulating substrate, 101-First insulating wall, 102-Second insulating wall, 103-Short side insulator, 104-Central rectangular slot.

[0036] 2-Male connector signal terminal, 201-First contact, 202-Second contact, 203-Male connector terminal solder pad, 204-Snap-fit ​​protrusion

[0037] 3-Male connector shielding shell, 301-Top shielding part, 302-Outer shielding part, 303-Inner shielding part, 304-Male connector grounding solder foot, 305-First snap-fit ​​groove, 306-Second snap-fit ​​groove

[0038] 4-Mother insulating substrate, 401-First long side wall, 402-Second long side wall, 403-Short side wall, 404-Island structure, 405-Pair of slots

[0039] 5-Female connector signal terminal, 501-Fixing part, 502-First elastic arm, 503-Second elastic arm, 504-Female connector terminal solder pad.

[0040] 6-Main seat shielding shell, 601-Top wall shielding part, 602-Inner wall shielding part, 603-Outer wall shielding part, 604-First female seat grounding solder foot, 605-First fastening protrusion

[0041] 7-Middle island shielding shell, 701-Cap section, 702-Grounding plate, 703-Second female connector grounding solder foot, 704-First female connector grounding terminal, 705-Second female connector grounding terminal, 706-Middle island armor, 707-Second snap-fit ​​protrusion

[0042] 8-Third female connector grounding terminal, 801-Floating slot. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Example 1:

[0045] like Figures 1 to 3 As shown, this embodiment of the invention provides a shielded board-to-board connector assembly, including a male connector and a female connector electrically connected to the male connector via a pluggable mating connection. Specifically:

[0046] like Figures 4 to 6 As shown, the male connector includes a male insulating base 1, a group of male signal terminals 2, and a male shielding shell 3. The male signal terminals 2 and the male shielding shell 3 are both made of metal and are integrated with the male insulating base 1 by inlay injection molding, which saves assembly steps and costs.

[0047] In this embodiment, the male insulating base 1 is the basic part of the male connector. Its main body adopts a rectangular box structure design, including a pair of oppositely arranged long-side insulators, a pair of oppositely arranged short-side insulators 103, and a central rectangular slot 104 surrounded by the long-side insulators and the short-side insulators 103. The long-side insulator includes a first insulating wall 101 and a second insulating wall 102. The second insulating wall 102 serves as the mounting base for the male connector signal terminal 2 group. It provides physical support and plays an electrical insulating role, isolating each male connector signal terminal 2 so that they do not interfere with each other. The main body of the second insulating wall 102 (i.e., the part used to embed the male connector signal terminal 2 group) is recessed towards the limiting slot, so that the male connector signal terminal 2 is recessed within the shielding space, thereby improving the anti-interference capability of signal transmission.

[0048] The male connector signal terminal group 2 serves as the electrical ground plane 702 of the male connector, and is made of elastic metal sheet. The male connector signal terminal group 2 includes multiple male connector signal terminals 2 that are equally spaced and embedded on the second insulating wall 102. The male connector signal terminal group 2 includes a first contact portion 201, a second contact portion 202, and a male connector terminal solder foot 203. The first contact portion 201 covers the outer side of the second insulating wall 102 and is formed with a snap-fit ​​protrusion 204. The second contact portion 202 covers the inner side of the second insulating wall 102 and is parallel to the body of the first contact portion 201. The male connector terminal solder foot 203 passes through the male insulating substrate 1 and extends horizontally outside the male insulating substrate 1 for connecting the circuit board and realizing the transmission of electrical signals.

[0049] The male connector shielding shell 3 is integrally formed using a bending process, and includes a top shielding part 301, an outer shielding part 302, an inner shielding part 303, and a male connector grounding solder foot 304. The top shielding part 301 fully covers the top surface of the short-side insulator 103 and the first insulating wall 101, and partially covers the top surfaces of both ends of the second insulating wall 102 (i.e., the top surface of the part not where the male connector signal terminal 2 group is embedded). The outer shielding part 302 is formed by bending downward from the outer edge of the top shielding part 301, and fully covers the outer side of the short-side insulator 103 and the first insulating wall 101 to construct a continuous electromagnetic shielding cavity, and the outer shielding part 301... The 2nd part also has a first snap-fit ​​groove 305 formed on it to better engage with the female connector; the inner shielding part 303 extends downward from the top shielding part 301 of the first insulating wall 101 and the second insulating wall 102, covering the inner side of the first insulating wall 101 and the second insulating wall 102, and a second snap-fit ​​groove 306 is also formed on the inner shielding part 303 on the inner side of the first insulating wall 101 to form a mechanical interlock with the central island armor 706 of the female connector. The male connector grounding solder foot 304 extends horizontally outward from the lower end of the outer shielding part 302, grounding and firmly fixing the male connector to the PCB board.

[0050] like Figures 7 to 10 As shown, the female connector includes a female insulating base 4, a female signal terminal group 5, a female shielding shell 6, and a central island shielding shell 7. The central island shielding shell 7 and the female shielding shell 6 are also made of metal and are formed and fixed together with the female insulating base 45 by an insert molding process.

[0051] In this embodiment, the female insulating substrate 4 is the basic part of the female connector. Its main body adopts a rectangular box structure design. As the mounting base for other components of the female connector, it provides physical support and plays a role in electrical insulation. The female insulating substrate 4 includes a pair of oppositely arranged long side walls, a pair of oppositely arranged short side walls 403, and an island structure 404 integrally formed in the middle of the base plate of the female insulating substrate 4 and protruding upward. Among them, the long side walls include a first long side wall 401 and a second long side wall 402. The middle part of the second long side wall 402 (i.e., the part used to install the female connector signal terminal 5) protrudes towards the island structure 404, so that the female connector signal terminal 5 is also recessed within the shielding space, thereby reducing high-frequency signal crosstalk. The dimensions of the central island structure 404 are matched with the central slot of the male insulating base 1, and the central island structure 404 is spaced apart from both the long side wall and the short side wall 403 to form a U-shaped mating slot 405 for mating with the male connector.

[0052] The female connector signal terminal group 5 includes female connector signal terminals 5 corresponding to the number of male connector signal terminals 2. The female connector signal terminals 5 are arranged side by side at intervals in the female connector terminal slots between the long side wall and the central island structure 404. As the main working part of the female connector, the female connector signal terminal 5 is integrally bent from an elastic metal sheet and includes a fixing part 501, a first elastic arm 502, a second elastic arm 503, and a female connector terminal solder foot 504. The inner side of the second long side wall 402 is provided with a fixing groove facing the central island structure 404. The fixing part 501 is embedded in the fixing groove. The first elastic arm 502 is bent downward from the top of the fixing part 501 and located outside the fixing groove. The second elastic arm 503 extends from the bottom of the first elastic arm 502 toward the central island and is bent upward. The first elastic arm 502 and the second elastic arm 503 form an opposing contact structure. When the male connector is inserted into the female connector, the first elastic arm 502 and the second elastic arm 503 of the female connector signal terminal 5 can form a tight contact with the first contact part 201 and the second contact part 202 of the male connector signal terminal 2 through the elastic force generated by elastic deformation, respectively, to complete the electrical connection function. The female connector terminal solder foot 504 is bent outward from the bottom of the fixing part 501 and passes through the bottom plate of the female insulating substrate 4 and is exposed outside the female insulating substrate 4 for connecting the circuit board to realize the transmission of electrical signals.

[0053] The female connector shielding housing 6 is an integral component formed by stretching and bending a metal plate to enhance the structural strength and electromagnetic shielding performance of the female insulating substrate 4. The female connector shielding housing 6 includes a top wall shielding portion 601 covering the top of the female insulating substrate 4, an inner wall shielding portion 602 covering the inner side of the short side wall 403 and the inner side of the long side wall, and an outer wall shielding portion 603 covering the outer side of the short side wall 403 and the outer side of the long side wall. The inner wall shielding portion 602 has a first snap-fit ​​protrusion 605 for engaging with a first snap-fit ​​groove 305 on the outer shielding portion 302 of the male connector shielding housing 3. The outer wall shielding portion 603 extends vertically downwards to form a first female connector grounding solder foot 604 for establishing a reliable grounding path. Furthermore, the outer wall shielding portion 603, covering the outer side of the second long side wall 402, can fully cover the outer side of the electrical contact portion of the female connector signal terminal 5 group, forming full-circumference shielding. Furthermore, the outer wall shielding part 603 has a solder lead-out opening at the bottom of the corresponding second long side wall 402, so that the solder lead 504 of the female terminal and the outer wall shielding part 603 maintain a certain distance, thereby optimizing the withstand voltage between the female shielding housing 6 and the female signal terminal 5 group.

[0054] The island shielding housing 7 includes a cap 701, a ground plane 702, a second female connector grounding solder pad 703, a first female connector grounding terminal 704, and a second female connector grounding terminal 705. The cap 701 completely covers both ends of the island structure 404 to protect the ends of the island structure 404. The ground plane 702 extends from the cap 701 toward the short side wall 403 and is located on the inner bottom surface of the female insulating base 5. The second female connector grounding solder pad 703 extends outward from the ground plane 702 for soldering to the PCB board, achieving low-impedance grounding between the female connector and the PCB board. The ground plane 702 has vertically upward-extending elastic contact portions (i.e., the first female connector grounding terminal 704) on both sides for electrical contact with the outer shielding portion 302 of the male connector shielding housing 3, achieving equipotential connection between the male and female connector shielding housings 6.

[0055] like Figure 11 As shown in the preferred embodiment, the caps 701 at both ends of the island structure 404 are integrally connected by the island armor 706. The island armor 706 partially covers the side of the island structure 404 away from the female connector signal terminal 5, making the entire island shielding shell 7 a whole, thereby constructing a closed-loop shielding structure and forming a complete return electromagnetic interference suppression path. Furthermore, the bottom of the island armor 706 is provided with multiple second female connector grounding terminals 705 extending towards the first long side wall 401 and bending upwards. Through multi-point contact, the connector's electromagnetic interference resistance is further improved, effectively preventing EMI leakage. In addition, the outer wall of the island armor 706 is provided with second snap-fit ​​protrusions 707 that cooperate with the second snap-fit ​​groove 306 of the inner shielding part 303 of the male connector shielding shell 3, further improving the reliability and contact stability of the connection between the female connector and the male connector.

[0056] The shielded board-to-board connector assembly provided by this invention forms a three-layer shielding protection through the mutual contact of the female shielding shell 6, the male shielding shell 3, and the central island shielding shell 7 (i.e., the inner wall shielding part 602 of the female shielding shell 6 is in electrical contact with the outer shielding part 302 of the male shielding shell, and the inner shielding part 303 of the male shielding shell is in electrical contact with the elastic contact part of the central island shielding shell 7). Through the three-level progressive shielding structure, multi-layer electromagnetic interference suppression is achieved while ensuring structural compactness, greatly improving the shielding effectiveness.

[0057] Example 2:

[0058] Since the elastic contact points of the female connector in Embodiment 1 are mainly concentrated on the same side of the connector, when the male connector is engaged with the female connector, the male connector tends to lean towards the second long side wall 402 of the female connector.

[0059] Therefore, as Figures 12 to 14As shown, as an alternative, the difference between this embodiment and Embodiment 1 is that the number of the third female base grounding terminal 8 (equivalent to the second female base grounding terminal 705 in Embodiment 1) used for electrical contact with the outer shielding part 302 of the first insulating wall 101 is the same as that of the female base signal terminal 5, and the elastic contact points of the third female base grounding terminal 8 are arranged in a mirror symmetrical manner with the elastic contact points of the female base signal terminal 5.

[0060] Specifically, in this embodiment, the two cap portions 701 are not connected as a whole by the central island armor 706. Instead, a floating groove 801 is provided on the central island structure 404 for the third female connector grounding terminal 8 to float. The third female connector grounding terminal 8 is formed by extending from the bottom of the inner wall shielding portion 602 of the inner side of the first long side wall 401 toward the central island structure 404 and bending upward. When the male connector is inserted into the female connector, the elastic contact point of the third female connector grounding terminal 8 and the inner shielding portion 303 of the male connector shielding shell 3 can form symmetrically distributed grounding contacts, thereby ensuring that the force on each contact point is more uniform and the connection is more stable when the male connector and the female connector are plugged into each other.

[0061] The embodiments described above are merely illustrative of implementation methods of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A shielded board-to-board connector assembly, characterized in that, Includes a male connector and a pluggable female connector; the male connector includes: The male insulating substrate (1) has a pair of short-side insulators (103) and a pair of long-side insulators arranged opposite to each other, and a central rectangular slot (104) surrounded by the long-side insulators and the short-side insulators (103). The long-side insulators include a first insulating wall (101) and a second insulating wall (102) recessed toward the central rectangular slot (104). The male connector signal terminal (2) group includes a plurality of male connector signal terminals (2) that are equally spaced and embedded in the second insulating wall (102). Each male connector signal terminal (2) is provided with: a first contact portion (201) covering the outside of the second insulating wall (102), a second contact portion (202) covering the inside of the second insulating wall (102), and a male connector terminal solder foot (203) extending horizontally to the bottom of the male insulating substrate (1). The male seat shielding housing (3) includes an outer shielding portion (302) that fully covers the outside of the short side insulator (103) and the first insulating wall (101), a top shielding portion (301) that covers the top surface of the short side insulator (103) and the first insulating wall (101), an inner shielding portion (303) that covers the inside of the first insulating wall (101), and a male seat grounding solder foot (304) that extends horizontally outward from the lower end of the outer shielding portion (302).

2. The shielded board-to-board connector assembly according to claim 1, characterized in that: The female connector includes: The mother insulation substrate (4) has a pair of short side walls (403) and a pair of long side walls arranged opposite to each other, and a central island structure (404) located in the middle of the mother insulation substrate (4) and protruding upward. The long side walls include a first long side wall (401) and a second long side wall (402) protruding towards the central island structure (404). The female connector signal terminal (5) group includes female connector signal terminals (5) corresponding to the number of male connector signal terminals (2). The female connector signal terminal (5) includes: a fixing part (501) embedded in the second long side wall (402), a first elastic arm (502) bent downward from the top of the fixing part (501), a female connector terminal solder foot (504) bent outward from the bottom of the fixing part (501), and a second elastic arm (503) bent towards the center island from the bottom of the first elastic arm (502). The first elastic arm (502) and the second elastic arm (503) form an opposing contact structure. The female base shield housing (6) includes a top wall shield (601) covering the top of the female insulating substrate (4), an inner wall shield (602) covering the inner side of the short side wall (403) and the inner side of the long side wall, an outer wall shield (603) covering the outer side of the short side wall (403) and the outer side of the long side wall, and a first female base grounding solder foot (604) extending downward from the outer wall shield (603). The island shield housing (7) includes a cap portion (701) covering both ends of the island structure (404), a grounding plate (702) extending from the cap portion (701) to the short side wall (403), a second female grounding solder foot (703) extending outward from the grounding plate (702), and a first female grounding terminal (704) disposed on both sides of the grounding plate (702) and extending upward.

3. The shielded board-to-board connector assembly according to claim 2, characterized in that: The caps (701) at both ends of the island structure (404) are integrally connected by the island armor (706), and the island armor (706) partially covers the side of the island structure (404) away from the female signal terminal (5).

4. A shielded board-to-board connector assembly according to claim 3, characterized in that: The bottom of the central island armor (706) is provided with multiple second female grounding terminals (705) that extend toward the first long side wall (401) and bend upward.

5. A shielded board-to-board connector assembly according to claim 2, characterized in that: The bottom of the inner wall shield (602) on the inner side of the first long side wall (401) is formed with a plurality of third female grounding terminals (8) extending toward the central island structure (404) and bending upward.

6. A shielded board-to-board connector assembly according to claim 2, characterized in that: The outer shielding part (302) of the male seat shielding shell (3) is provided with a first fastening groove (305), and the inner wall shielding part (602) of the corresponding female seat shielding shell (6) is provided with a first fastening protrusion (605).

7. A shielded board-to-board connector assembly according to claim 4, characterized in that: The outer wall of the central island armor (706) is provided with a second fastening protrusion (707) that cooperates with the second fastening groove (306) of the inner shielding part (303) of the male seat shielding shell (3).

8. A shielded board-to-board connector assembly according to claim 2, characterized in that: The outer wall shielding part (603) has a welding foot lead-out opening at the bottom of the corresponding second long side wall (402).

9. A shielded board-to-board connector assembly according to any one of claims 2-8, characterized in that: The male connector signal terminal (2) group and the male connector shielding shell (3) are integrated with the male insulating substrate (1) using metal materials through an insert molding process; the central island shielding shell (7) and the female connector shielding shell (6) are integrated with the female insulating substrate (4) using metal materials through an insert molding process.

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