Card edge connector outer row terminal modular assembly structure

Abstract

The application discloses a modular assembling structure of an outer-row terminal module of a card edge connector, and is characterized in that an insulating body is provided with a row of outer-row terminal module accommodating grooves which are arranged at intervals in the left-right direction on the front and back sides of a card slot, the outer-row terminal module accommodating grooves are communicated with the card slot, a plurality of outer-row terminal insertion grooves which are arranged at intervals in the left-right direction are formed on an outer-row terminal limiting block, each outer-row terminal is fixedly inserted into the outer-row terminal insertion groove of the outer-row terminal limiting block to form an outer-row terminal module, each outer-row terminal module is correspondingly fixedly inserted into the outer-row terminal module accommodating groove of the insulating body, the outer-row terminal elastic contact arm of each outer-row terminal can elastically swing into the card slot in the front-back direction, and the outer-row terminal elastic contact part of the free end of the outer-row terminal elastic contact arm of the two rows of outer-row terminals can clamp an electronic card in the card slot. The application can improve the terminal assembling efficiency and assembling precision of the card edge connector, can also adjust the characteristic impedance of inner-row signal terminals, and can improve the high-frequency performance of the connector.

Description

Technical Field

[0001] This invention relates to a card edge connector, and more particularly to a modular assembly structure for the outer terminal block of a card edge connector. Background Technology

[0002] DDR6 series card edge connectors generally employ a four-row terminal arrangement with inner row terminals on the outside and outer row terminals on the outside. Since the outer and inner row terminals need to be clamped at the top and bottom of the electronic card respectively, the outer row terminals are longer than the inner row terminals. The arrangement of the outer row terminals also differs from the inner row terminals; they are not arranged continuously but in groups, with multiple gaps between adjacent groups. Therefore, the outer and inner row terminals cannot be simultaneously assembled. Furthermore, during terminal assembly, the different lengths and densities of the outer and inner row terminals make it difficult to align and insert both rows simultaneously using traditional terminal assembly methods. Additionally, placing two rows of terminals on each side of the card slot increases the connector width, resulting in a larger footprint on the circuit board. Summary of the Invention

[0003] To overcome the above deficiencies, the present invention provides a modular assembly structure for the outer row of terminals of the card edge connector, which is beneficial to improving the assembly efficiency and assembly accuracy of the card edge connector terminals of the DDR6 series.

[0004] The technical solution adopted by this invention to solve its technical problem is: a modular assembly structure for the outer row of terminals of a card edge connector, including an insulating body and outer row terminals. The card edge connector is soldered to the lower side of one side of a circuit board. The connector's width direction is the front-to-back direction, and its length direction is the left-to-right direction. The insulating body has a card slot extending in the left-to-right direction. The insulating body has a row of outer row terminal module receiving slots spaced apart in the left-to-right direction on both the front and rear sides of the card slot. The outer row terminal module receiving slots are connected to the card slots. An outer row terminal limiting block is also provided. The system has several outer row terminal slots arranged at intervals along the left and right directions. Each outer row terminal can be fixedly inserted into the outer row terminal slot in a corresponding manner. The outer row terminal limiting block and the several outer row terminals on it form an outer row terminal module. The several outer row terminal modules can be fixedly inserted into the outer row terminal module receiving groove of the insulating body in a corresponding manner. The outer row terminal elastic contact arm of each outer row terminal can be elastically swung in the front and back direction and extended into the card slot. The outer row terminal elastic contact part at the free end of the outer row terminal elastic contact arm of the two rows of outer row terminals can clamp the two side walls of the electronic card inserted into the card slot.

[0005] As a further improvement of the present invention, the outer terminal module receiving groove forms an insertion port on the lower side of the insulating body, and each outer terminal module can be tightly inserted into the outer terminal module receiving groove of the insulating body from bottom to top. The upper end of the outer terminal limiting block of each outer terminal module stops on the upper bottom surface of the outer terminal module receiving groove. The outer terminal limiting block includes a base plate and several partitions extending vertically in the vertical direction. The several partitions are fixedly disposed on one side surface of the base plate in the front-back direction in the left-right direction at parallel intervals. An outer terminal slot is formed between adjacent partitions. The part of the base plate located between adjacent partitions forms the bottom surface of the outer terminal slot. The outer terminal slot and the inner side wall of the outer terminal module receiving groove together form the outer terminal receiving groove. The outer terminal holding part of the outer terminal can be fixedly positioned in the outer terminal receiving groove.

[0006] As a further improvement of the present invention, the bottom surface of the outer terminal slot of the outer terminal limiting block is further provided with a plurality of outer terminal holding grooves. The holding part of the outer terminal is provided with an outer terminal holding arm on one side wall along the front-back direction. The outer terminal holding arm is provided with a first barb structure. The outer terminal holding arm is tightly inserted into the outer terminal holding groove, and the first barb structure on the outer terminal holding arm is embedded in the side wall of the outer terminal holding groove.

[0007] As a further improvement of the present invention, a second barb structure is provided on the other side wall of the holding part of the outer terminal along the front-back direction, and the second barb structure on the other side wall of the holding part of the outer terminal along the front-back direction can be embedded in the inner side wall of the outer terminal module receiving groove.

[0008] As a further improvement of the present invention, a limiting slope is formed on the side wall of the outer terminal receiving groove near the card slot, and the outer terminal elastic contact arm of the outer terminal can be stopped on the surface of the limiting slope after elastically swinging a set angle toward the card slot.

[0009] As a further improvement of the present invention, the partition of the outer terminal limiting block is provided with a bottom plate on one side surface facing away from the card slot in the front-back direction, and a limiting inclined surface is provided on the bottom surface of the outer terminal slot. The bottom plate of the outer terminal limiting block is provided with a plurality of protruding ribs arranged in parallel intervals in the left-right direction on the other side surface in the front-back direction. The outer terminal module receiving groove is provided with a plurality of positioning grooves arranged in parallel intervals in the left-right direction on the side wall near the card slot. The protruding ribs on the bottom plate of the outer terminal limiting block can be inserted into each positioning groove with interference fit.

[0010] As a further improvement of the present invention, the insulating body is provided with a row of inner terminal receiving slots arranged at intervals in the left and right direction on both the front and rear sides of the card slot. The inner terminal receiving slots are located between the card slot and the outer terminal module receiving slot. A number of inner terminals are also provided. The number of inner terminals are fixedly installed in the inner terminal receiving slots one by one. The elastic contact arm of the inner terminal can be elastically swung in the front and rear direction and extended into the card slot. The inner terminal contact parts at the free ends of the elastic contact arms of the two rows of inner terminals can respectively clamp the two side walls of the electronic card inserted into the card slot.

[0011] As a further improvement of the present invention, a plurality of inner terminal receiving slots and outer terminal module receiving slots are connected in the front-to-back direction to form an integral slot, and the protruding ribs on the outer terminal limiting block inserted in the outer terminal module receiving slot form the inner sidewall of the inner terminal receiving slot on the side facing the insertion slot.

[0012] As a further improvement of the present invention, the inner row terminal is provided with an inner row terminal holding part. The inner row terminal holding part has a third barb structure on the surface facing the insertion slot in the front-back direction. The surface facing away from the insertion slot in the front-back direction of the inner row terminal holding part is a vertically extending plane. The inner row terminal can be inserted into the inner row terminal receiving groove from bottom to top. The vertical plane on the inner row terminal holding part of the inner row terminal is in close contact with the rib surface on the outer row terminal limiting block. The third barb structure on the inner row terminal holding part of the inner row terminal can be embedded in the inner side wall of the inner row terminal receiving groove near the insertion slot.

[0013] As a further improvement of the present invention, the upper end height of the bottom plate of the outer terminal limiting block is not lower than the upper end height of the inner terminal, and the bottom plate of the outer terminal limiting block forms a shielding barrier between the inner terminal and the outer terminal.

[0014] As a further improvement of the present invention, a reinforcing cantilever is integrally formed on the inner row terminal. The reinforcing cantilever can elastically swing in the front-back direction. The reinforcing cantilever is located on the side of the inner row terminal elastic contact arm facing away from the card slot. The free end of the reinforcing cantilever is provided with a reinforcing contact portion protruding towards the card slot. After the inner row terminal elastic contact arm swings away from the card slot by a set angle, it can tightly abut against the reinforcing contact portion of the reinforcing cantilever.

[0015] The beneficial technical effects of this invention are as follows: This invention sets an outer terminal limiting block and forms a set of outer terminal slots on the outer terminal limiting block. A set of outer terminals is fixedly assembled one-to-one into the outer terminal slots on the outer terminal limiting block to form an outer terminal module. The entire outer terminal module is inserted into the outer terminal module receiving groove of the insulating body to achieve the assembly of a set of outer terminals. This method facilitates the assembly of outer terminals, and the outer terminal module is inserted from bottom to top when assembled on the insulating body, preventing it from falling out under vibration and long-term use. The outer terminal module achieves fixed positioning between the outer terminal limiting block and the outer terminal module receiving groove through an interference fit, and also utilizes the second barb structure on the outer terminal holding part to hold the outer terminal module in place. The inner sidewall of the slot ensures that the outer row terminals are firmly fixed and accurately positioned within the insulation body. This invention also connects the outer row terminal module receiving slot with the inner row terminal receiving slot. The protruding ribs and base plate of the outer row terminal limiting block form the sidewall of the inner row terminal receiving slot near the outer row terminals, saving space in the width of the insulation body and facilitating the reduction of the width of the card edge connector. Furthermore, the base plate of the outer row terminal limiting block forms a shielding wall between the outer and inner row terminals, isolating them to form a signal shielding structure. This allows for adjustment of the characteristic impedance of the inner row signal terminals, improving the high-frequency performance of the card edge connector. This invention facilitates efficient assembly of DDR6 series card edge connector terminals, resulting in a firm, stable, and highly accurate assembly that effectively improves the high-frequency performance and signal stability of the card edge connector. 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 external terminal block of the present invention;

[0018] Figure 3 This is a first perspective view of the external terminal limiting block of the present invention;

[0019] Figure 4 This is a second perspective view of the outer terminal limiting block of the present invention;

[0020] Figure 5 This is a front view of the outer terminal limiting block of the present invention;

[0021] Figure 6 This is a bottom view of the outer terminal limiting block of the present invention;

[0022] Figure 7 This is a right view of the outer terminal limiting block of the present invention;

[0023] Figure 8 This is a rear view of the outer terminal limiting block of the present invention;

[0024] Figure 9 for Figure 8 Sectional view along line AA;

[0025] Figure 10 This is a diagram showing the external terminal and the external terminal limiting block of the present invention before assembly;

[0026] Figure 11 This is a diagram showing the state of the external terminal and the external terminal limiting block after assembly according to the present invention;

[0027] Figure 12 This is a front view of the external terminal module of the present invention;

[0028] Figure 13 for Figure 12 Sectional view along the BB direction;

[0029] Figure 14 This is a bottom view of the external terminal module of the present invention;

[0030] Figure 15 This is a right view of the external terminal module of the present invention;

[0031] Figure 16 This is a rear view of the external terminal block module of the present invention;

[0032] Figure 17 This is a diagram showing the external terminal module and the insulating body of the present invention before assembly.

[0033] Figure 18 for Figure 17 Enlarged view of section C;

[0034] Figure 19 This is a diagram showing the state of the external terminal module and the insulating body after assembly according to the present invention;

[0035] Figure 20 This is a partial front view of the external terminal module and the insulating body after assembly according to the present invention;

[0036] Figure 21 for Figure 20 Sectional view along the DD direction;

[0037] Figure 22 This is a diagram showing the state of the inner terminal module and the insulating body before assembly according to the present invention;

[0038] Figure 23 This is a partial front view of the inner terminal module and the insulating body after assembly according to the present invention;

[0039] Figure 24 for Figure 22 Sectional view along the DD direction;

[0040] Figure 25This is the main view of the inner row of terminals;

[0041] Figure 26 This is a perspective view of the card edge connector using the present invention in use. Detailed Implementation

[0042] To make the advantages, technical solutions, and innovations of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings as embodiments. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the protection scope of this invention.

[0043] Example: A modular assembly structure for an outer row of terminals of a card edge connector includes an insulating body 11 and outer row terminals 121. The card edge connector is soldered to the lower side of one side of a circuit board 3. The connector's width direction is the front-to-back direction, and its length direction is the left-to-right direction. The insulating body 11 has a card slot 111 extending in the left-to-right direction. The insulating body 11 has a row of outer row terminal module receiving slots 112 arranged at intervals in the left-to-right direction on both the front and back sides of the card slot 111. The outer row terminal module receiving slots 112 are connected to the card slots 111. An outer row terminal limiting block 122 is also provided. A plurality of outer row terminals are formed on the outer row terminal limiting block 122 arranged at intervals in the left-to-right direction. The slot 1223, each of the outer row terminals 121 can be fixedly inserted into the outer row terminal slot 1223 in a corresponding manner. The outer row terminal limiting block 122 and the several outer row terminals 121 on it form an outer row terminal module 12. The several outer row terminal modules 12 can be fixedly inserted into the outer row terminal module receiving groove 112 of the insulating body 11 in a corresponding manner. The outer row terminal elastic contact arm 1211 of each outer row terminal 121 can be elastically swung in the front-back direction and extended into the card slot 111. The outer row terminal elastic contact part 12111 at the free end of the outer row terminal elastic contact arm 1211 of the two rows of outer row terminals 121 can clamp the two side walls of the electronic card 2 inserted into the card slot 111.

[0044] The outer terminal 121 is first inserted into the outer terminal slot 1223 of the outer terminal limiting block 122 to form the outer terminal module 12. Then, the entire outer terminal module 12 is inserted into the outer terminal module receiving groove 112 of the insulating body 11. This facilitates the assembly of the outer terminal 121 on the insulating body 11. Furthermore, different specifications of outer terminals 121 can be inserted into the outer terminal slot 1223 of the outer terminal limiting block 122 as needed to accommodate the assembly of different specifications of edge connectors. Assembling a small number of outer terminals 121 on the outer terminal limiting block 122 is very easy. It is easy and convenient to assemble the entire external terminal module 12 within the external terminal module receiving slot 112 on the insulating body 11. Therefore, it greatly simplifies the assembly difficulty of the external terminal 121. Furthermore, the external terminal 121 is limited by the external terminal limiting block 122, which can ensure its assembly accuracy within the insulating body 11. This assembly method can improve the assembly efficiency and terminal assembly accuracy of the DDR6 series card edge connector, reduce the assembly difficulty, and allow for the replacement and transformation of different specifications of the external terminal 121 to meet the different usage requirements and performance of the card edge connector.

[0045] The external terminal module receiving groove 112 forms an insertion port on the lower side of the insulating body 11. Each external terminal module 12 can be tightly inserted into the external terminal module receiving groove 112 of the insulating body 11 from bottom to top. The upper end of the external terminal limiting block 122 of each external terminal module 12 stops on the upper bottom surface of the external terminal module receiving groove 112. The external terminal limiting block 122 includes a base plate 1221 and several partitions 1222 extending vertically in the vertical direction. The partitions 1222 extend horizontally in the left and right directions. The outer terminal slots 1223 are fixedly disposed on one side surface of the base plate 1221 along the front-back direction with parallel spacing. An outer terminal slot 1223 is formed between adjacent partitions 1222. The part of the base plate 1221 located between adjacent partitions 1222 forms the bottom surface of the outer terminal slot 1223. The outer terminal slot 1223 and the inner side wall of the outer terminal module receiving groove 112 together form the outer terminal receiving groove 121. The outer terminal holding part 1212 of the outer terminal 121 can be fixedly positioned in the outer terminal receiving groove 121.

[0046] The outer terminal module 12 is inserted into the outer terminal module receiving slot 112 of the insulating body 11 from bottom to top. After the edge connector is soldered to the circuit board 3, the outer terminal module 12 will not detach from the outer terminal module receiving slot 112 due to vibration or other reasons, which can ensure the communication stability of the outer terminal 121 during long-term use. Moreover, the overall structure of the outer terminal limiting block 122 is simple. Its outer terminal slot 1223 is a U-shaped structure. The outer terminal 121 can be directly inserted from the opening of the U-shaped structure. The assembly of the outer terminal 121 is very convenient. The outer terminal 121 receiving slot is formed by one side wall of the outer terminal module receiving slot 112 and the outer terminal slot 1223, which saves more internal space of the insulating body 11 and can also improve the bonding strength between the outer terminal module 12 and the outer terminal module receiving slot 112 of the insulating body 11.

[0047] The bottom surface of the outer terminal slot 1223 of the outer terminal limiting block 122 is also provided with a plurality of outer terminal holding grooves 12212. The holding part of the outer terminal 121 is provided with an outer terminal holding arm 12121 on one side wall along the front-back direction. The outer terminal holding arm 12121 is provided with a first barb structure 121211. The outer terminal holding arm 12121 is tightly inserted into the outer terminal holding groove 12212, and the first barb structure 121211 on the outer terminal holding arm 12121 is embedded in the side wall of the outer terminal holding groove 12212. When the outer terminal 121 is inserted into the outer terminal slot 1223 from the side, the retaining arm of the outer terminal 121 is tightly inserted into the outer terminal retaining groove 12212 on the bottom surface of the outer terminal slot 1223. The first barb structure 121211 interferes with the side wall of the outer terminal retaining groove 12212 to form a tight connection. At the same time, the other arm of the outer terminal 121 is blocked by the inner side wall of the outer terminal module receiving groove 112 of the insulating body 11, so that the outer terminal retaining arm 12121 cannot be dislodged from the outer terminal retaining groove 12212. Therefore, it can be ensured that the outer terminal 121 will not fall off even under the pulling force of the insertion and removal card for a long time, and can maintain a stable position for a long time.

[0048] The retaining part of the outer terminal 121 is provided with a second barb structure 12122 on the other side wall along the front-back direction. The second barb structure 12122 on the other side wall along the front-back direction of the retaining part of the outer terminal 1212 can be embedded in the inner side wall of the outer terminal module receiving groove 112. When the outer terminal module 12 is inserted into the outer terminal module receiving groove 112, the second barb structure 12122 on the outer terminal holding part 1212 of the outer terminal 121 is embedded in the inner side wall of the outer terminal module receiving groove 112, thereby fixing the outer terminal module 12 and the outer terminal module receiving groove 112 in a fixed position. This ensures that the outer terminal module 12 and the insulating body 11 can be stably positioned before the connector is soldered to the circuit board 3. Alternatively, a barb structure can be provided on the side wall of the outer terminal limiting block 122 to interfere with the inner side wall of the outer terminal module receiving groove 112, thereby achieving stable positioning of the outer terminal module 12 and the insulating body 11. Or, a through hole can be formed on the outer terminal limiting block 122, and a positioning post can be provided on the insulating body 11. After the positioning post is inserted into the through hole, it can be heat-fused to form a whole. These are all equivalent replacement structures that can be easily conceived by those skilled in the art based on this application, and they all fall within the protection scope of this application.

[0049] A limiting slope 12211 is formed on the side wall of the outer terminal 121 receiving groove near the card slot 111. The elastic contact arm 1211 of the outer terminal 121 can stop on the surface of the limiting slope 12211 after elastically swinging a set angle toward the card slot 111. The limiting slope 12211 limits the elastic swing angle of the outer terminal 121, preventing the elastic cantilever of the outer terminal 121 from extending too far into the card slot 111, which would cause the elastic contact arm 1211 of the outer terminal 121 to be crushed when inserting a card.

[0050] The partition 1222 of the outer terminal limiting block 122 has a base plate 1221 on one side surface facing away from the insertion slot 111 in the front-back direction. The limiting inclined surface 12211 is provided on the bottom surface of the outer terminal slot 1223. The other side surface of the base plate 1221 of the outer terminal limiting block 122 has a number of protruding ribs 1224 arranged in parallel in the left-right direction. The outer terminal module receiving groove 112 has a number of positioning grooves 1121 arranged in parallel in the left-right direction on one side wall near the insertion slot 111. The protruding ribs 1224 on the base plate 1221 of the outer terminal limiting block 122 can be inserted into each positioning groove 1121 with an interference fit. After the outer terminal module 12 is inserted into the outer terminal module receiving groove 112 to a certain depth, the protruding rib 1224 on the outer terminal limiting block 122 is inserted into the positioning groove 1121 at the lower end of the insulating body 11 with an interference fit, so that the outer terminal limiting block 122 and the insulating body 11 are fixedly positioned with an interference fit.

[0051] The insulating body 11 has a row of inner terminal 13 receiving slots 113 arranged in a left-right direction on each of the front and rear sides of the card slot 111. The inner terminal 13 receiving slots 113 are located between the card slot 111 and the outer terminal module receiving slot 112. Several inner terminals 13 are also provided. The several inner terminals 13 are fixedly installed in the inner terminal 13 receiving slots 113 one by one. The inner terminal elastic contact arm 131 of the inner terminal 13 can be elastically swung in the front-back direction and extended into the card slot 111. The inner terminal contact part 1311 at the free end of the inner terminal elastic contact arm 131 of the two rows of inner terminals 13 can respectively clamp the two side walls of the electronic card 2 inserted into the card slot 111. The length of the inner row terminal 13 is less than the length of the outer row terminal 121. It is located inside the outer row terminal 121. Its inner row terminal elastic contact arm 131 clamps the lower part of the gold fingers on both sides of the electronic card 2, and the upper row terminal elastic contact arm of the upper row terminal clamps the upper part of the gold fingers on both sides of the electronic card 2.

[0052] Several inner terminal 13 receiving slots 113 and outer terminal module receiving slots 112 are connected in the front-to-back direction to form an integral slot. The protruding ribs 1224 on the outer terminal limiting block 122 inserted into the outer terminal module receiving slot 112 form the inner sidewall of the inner terminal 13 receiving slot 113 on the side facing the insertion slot 111. When the outer terminal module 12 is inserted into the outer terminal module receiving slot 112, the sidewall of the outer terminal limiting block 122 facing the insertion slot 111 and the sidewall of the outer terminal module receiving slot 112 facing the insertion slot 111 together form the inner terminal 13 receiving slot 113, which can reduce the width dimension of the insulation body 11.

[0053] The inner row terminal 13 is provided with an inner row terminal holding part 132. The inner row terminal holding part 132 has a third barb structure 1321 on the surface of the inner row terminal holding part 132 facing the insertion slot 111 in the front-back direction. The surface of the inner row terminal holding part 132 facing away from the insertion slot 111 in the front-back direction is a vertical plane extending up and down. The inner row terminal 13 can be inserted into the inner row terminal 13 receiving slot 113 from bottom to top. The vertical plane on the inner row terminal holding part 132 of the inner row terminal 13 is in close contact with the surface of the protruding rib 1224 on the outer row terminal limiting block 122. The third barb structure 1321 on the inner row terminal holding part 132 of the inner row terminal 13 can be embedded in the inner side wall of the inner row terminal 13 receiving slot 113 near the insertion slot 111. When the inner row terminal 13 is inserted into the inner row terminal 13 receiving groove 113, the third barb structure 1321 on the inner row terminal holding part 132 is embedded in the inner side wall of the inner row terminal 13 receiving groove 113 near the insertion slot 111 to achieve fixed positioning with the insulating body 11. The other side wall of the inner row terminal holding part 132 is tightly attached to the back of the outer row terminal limiting block 122 to prevent it from falling out. The inner row terminal holding part 132 may also be provided with the third barb structure 1321 on both sides.

[0054] The upper height of the base plate 1221 of the outer terminal limiting block 122 is not lower than the upper height of the inner terminal 13. The base plate 1221 of the outer terminal limiting block 122 forms a shielding barrier 12213 between the inner terminal 13 and the outer terminal 121. The base plate 1221 of the outer terminal limiting block 122 is located in the space between the inner terminal 13 and the outer terminal 121, blocking the inner terminal 13 and the outer terminal 121 to form a signal shielding structure, thereby allowing adjustment of the characteristic impedance of the inner signal terminal.

[0055] The inner row terminal 13 is also integrally formed with a reinforcing cantilever 133, which can elastically swing in the front-back direction. The reinforcing cantilever 133 is located on the side of the inner row terminal elastic contact arm 131 of the inner row terminal 13 facing away from the card slot 111. The free end of the reinforcing cantilever 133 is provided with a reinforcing contact portion 1331 protruding towards the card slot 111. After the inner row terminal elastic contact arm 131 of the inner row terminal 13 swings away from the card slot 111 by a set angle, it can tightly abut against the reinforcing contact portion 1331 of the reinforcing cantilever 133. When the electronic card 2 is inserted into the card slot 111, the inner row terminal contact portion 1311 of the inner row terminal 13 contacts the surface of the electronic card 2, and the inner row terminal elastic contact arm 131 swings outward. After swinging a certain angle, it contacts the reinforcing contact portion 1331 of the reinforcing cantilever 133. The reinforcing cantilever 133 provides a squeezing force to the inner row terminal 13, increasing its clamping force on the electronic card 2 and preventing the electronic card 2 from being dislodged.

Claims

1. A modular assembly structure for an outer row of terminals of a card edge connector, comprising an insulating body (11) and outer row terminals (121), wherein the card edge connector is soldered to the lower side of one side of a circuit board (3), the width direction of the connector is the front-to-back direction, the length direction of the connector is the left-to-right direction, and the insulating body is provided with a card slot (111) extending in the left-to-right direction, characterized in that: The insulating body has a row of outer terminal module receiving slots (112) arranged in a left-right direction on both the front and rear sides of the card slot. The outer terminal module receiving slots are connected to the card slot. It also has an outer terminal limiting block (122). The outer terminal limiting block has several outer terminal slots arranged in a left-right direction. Each outer terminal can be fixedly inserted into the outer terminal slot. The outer terminal limiting block and the several outer terminals on it form an outer terminal module (12). The several outer terminal modules can be fixedly inserted into the outer terminal module receiving slot of the insulating body. The outer terminal elastic contact arm (1211) of each outer terminal can be elastically swung in the front-back direction and extended into the card slot. The outer terminal elastic contact part (12111) at the free end of the outer terminal elastic contact arm of the two rows of outer terminals can clamp the two side walls of the electronic card (2) inserted into the card slot.

2. The modular assembly structure of the outer terminal block of the card edge connector according to claim 1, characterized in that: The outer terminal module receiving groove forms an insertion port on the lower side of the insulating body. Each outer terminal module can be tightly inserted into the outer terminal module receiving groove of the insulating body from bottom to top. The upper end of the outer terminal limiting block of each outer terminal module stops on the upper bottom surface of the outer terminal module receiving groove. The outer terminal limiting block includes a base plate (1221) and several partitions (1222) extending vertically in the up-down direction. Several partitions are fixedly arranged on one side surface of the base plate in the front-back direction in the left-right direction at parallel intervals. An outer terminal slot (1223) is formed between adjacent partitions. The part of the base plate located between adjacent partitions forms the bottom surface of the outer terminal slot. The outer terminal slot and the inner side wall of the outer terminal module receiving groove together form the outer terminal receiving groove. The outer terminal holding part (1212) of the outer terminal can be fixedly positioned in the outer terminal receiving groove.

3. The modular assembly structure of the outer terminal block of the card edge connector according to claim 2, characterized in that: The bottom surface of the outer terminal slot of the outer terminal limiting block is also provided with a plurality of outer terminal holding grooves (12212). The holding part of the outer terminal is provided with an outer terminal holding arm (12121) on one side wall along the front-back direction. The outer terminal holding arm is provided with a first barb structure (121211). The outer terminal holding arm is tightly inserted into the outer terminal holding groove, and the first barb structure on the outer terminal holding arm is embedded in the side wall of the outer terminal holding groove.

4. The modular assembly structure of the outer terminal block of the card edge connector according to claim 3, characterized in that: The retaining part of the outer terminal is provided with a second barb structure (12122) on the other side wall along the front-back direction. The second barb structure on the other side wall along the front-back direction of the retaining part of the outer terminal can be embedded in the inner side wall of the outer terminal module receiving groove.

5. The modular assembly structure of the outer terminal block of the card edge connector according to claim 2, characterized in that: A limiting slope (12211) is formed on the side wall of the outer terminal receiving groove near the card slot. The outer terminal elastic contact arm of the outer terminal can stop on the surface of the limiting slope after elastically swinging a set angle toward the card slot.

6. The modular assembly structure of the outer terminal block of the card edge connector according to claim 5, characterized in that: The partition of the outer terminal limit block has a bottom plate on one side surface facing away from the card slot in the front-back direction, and a limiting inclined surface is provided on the bottom surface of the outer terminal slot. The bottom plate of the outer terminal limit block has a number of protruding ribs (1224) arranged in parallel in the left-right direction on the other side surface in the front-back direction. The outer terminal module receiving groove has a number of positioning grooves (1121) arranged in parallel in the left-right direction on the side wall near the card slot. The protruding ribs on the bottom plate of the outer terminal limit block can be inserted into each positioning groove with interference fit.

7. The modular assembly structure of the outer terminal block of the card edge connector according to claim 6, characterized in that: The insulating body has a row of inner terminal receiving slots (113) arranged in a left-right direction on both the front and rear sides of the card slot. The inner terminal receiving slots are located between the card slot and the outer terminal module receiving slot. Several inner terminals (13) are also provided. The several inner terminals are fixedly installed in the inner terminal receiving slots one by one. The inner terminal elastic contact arm (131) of the inner terminal can be elastically swung into the card slot in the front-back direction. The inner terminal contact part (1311) at the free end of the inner terminal elastic contact arm of the two rows of inner terminals can clamp the two sides of the electronic card inserted into the card slot.

8. The modular assembly structure of the outer terminal block of the card edge connector according to claim 7, characterized in that: Several inner row terminal receiving slots and outer row terminal module receiving slots are connected in the front-to-back direction to form an integral slot. The protruding ribs on the outer row terminal limiting block inserted into the outer row terminal module receiving slot form the inner sidewall of the inner row terminal receiving slot on the side facing the insertion slot. The upper height of the bottom plate of the outer row terminal limiting block is not lower than the upper height of the inner row terminal. The bottom plate of the outer row terminal limiting block forms a shielding barrier (12213) between the inner row terminal and the outer row terminal.

9. The modular assembly structure of the outer terminal block of the card edge connector according to claim 7, characterized in that: The inner row terminal is provided with an inner row terminal holding part (132). The inner row terminal holding part is provided with a third barb structure (1321) on the surface of the inner row terminal holding part facing the insertion slot in the front-back direction. The surface of the inner row terminal holding part facing away from the insertion slot in the front-back direction is a vertical plane extending up and down. The inner row terminal can be inserted into the inner row terminal receiving groove from bottom to top. The vertical plane on the inner row terminal holding part of the inner row terminal is in close contact with the rib surface on the outer row terminal limiting block. The third barb structure on the inner row terminal holding part of the inner row terminal can be embedded in the inner side wall of the inner row terminal receiving groove near the insertion slot.

10. The modular assembly structure of the outer terminal block of the card edge connector according to claim 1, characterized in that: The inner row terminal is also integrally formed with a reinforcing cantilever (133). The reinforcing cantilever can elastically swing in the front-back direction. The reinforcing cantilever is located on the side of the inner row terminal elastic contact arm facing away from the card slot. The free end of the reinforcing cantilever is provided with a reinforcing contact part (1331) protruding towards the card slot. After the inner row terminal elastic contact arm swings away from the card slot by a set angle, it can tightly abut against the reinforcing contact part of the reinforcing cantilever.

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