Card connector combination

Abstract

The invention provides a plug-in card connector combination comprising a first connector comprising a first insulating body and a first terminal, the first insulating body is provided with a first slot and a mounting groove, and the first terminal is provided with a second slot; at least one local area in at least one first lengthwise side wall in the first lengthwise side walls on the two sides of the first slot is provided with at least one first terminal slot of which the inner side and the bottom are open, and the first terminal is fixed in the first terminal slot; the second connector comprises a second insulating body and a plurality of second terminals, the second insulating body is provided with a second slot, the second insulating body is arranged in the mounting groove, the second slot is correspondingly communicated with the first slot and allows the electronic module to be inserted, and a plurality of continuous second terminal slots are respectively arranged in second lengthwise side walls on two sides of the second slot. One second terminal is fixed in each second terminal groove; the card connector combination can reduce the width of the insulating body while keeping the high signal transmission speed.

Description

Technical Field

[0001] The invention belongs to the field of connectors, and in particular relates to a card plug-in connector combination. Background Art

[0002] Chinese patent CN202411745993.5 discloses a high-speed communication storage electrical connector, including an insulating body and a plurality of terminals accommodated in the insulating body.

[0003] The middle part of the top surface of the insulating body is concave in the longitudinal direction to form a longitudinal slot, and the two sides of the slot are provided with longitudinal side walls arranged along the length direction of the slot, and the longitudinal side walls on both sides of the slot are provided with a plurality of terminal slots. The top surface of the longitudinal side wall is concave downward at the terminal slot corresponding to the upper terminal receiving the upper terminal to form a rectangular groove with an open inner side, and a plurality of independent fences are located below the rectangular groove, and the outer sides of the plurality of independent fences are connected to the side wall of the rectangular groove close to the outer side of the insulating body.

[0004] Multiple terminals are respectively and one by one accommodated in corresponding terminal slots in the two longitudinal side walls. Some of the terminals in each of the longitudinal side walls are configured as double-layer terminals, that is, at least a portion of the terminal slots are configured with double-layer terminals, and the remaining terminal slots are single-layer terminals. The double-layer terminals include lower terminals and upper terminals. The upper terminals of the double-layer terminals are inserted downward from the top of the insulating body and fixed in the terminal slot, the lower terminals of the double-layer terminals are inserted upward from the bottom of the insulating body and fixed in the terminal slot, and the single-layer terminals are inserted upward from the bottom of the insulating body and fixed in the terminal slot. Each single-layer terminal is flush with the lower terminal and forms a row.

[0005] Both the upper terminal and the lower terminal include a fixing portion fixed in the corresponding terminal slot, and an opening is provided in the middle of the fixing portion to save metal materials. A clamping point is protruded from the inner side of the fixing portion to be clamped on the inner wall of the corresponding terminal slot. The fixing portion extends upward and downward to form an upper arm portion and a lower arm portion respectively, and the lower end of the lower arm portion is bent toward the inner side of the insulating body to form a welding portion. The upper end of the upper arm portion of the lower terminal protrudes toward the slot side to form a contact portion, and the upper end of the upper arm portion of the upper terminal extends toward the slot side to form an upper oblique arm, and the end of the upper oblique arm is bent downward to form a lower oblique contact arm, and the end of the lower oblique contact arm is a contact end, and the contact end extends into the slot.

[0006] The above-mentioned high-speed communication storage electrical connector increases the number of terminals by locally setting double-layer terminals, thereby increasing the signal transmission channel, so that the signal transmission speed is greatly improved. However, the upper terminal and the lower terminal are both installed in the same insulating body, and the fixing portion of the upper terminal is located in the middle of the terminal slot that accommodates the upper terminal. The fixing portion of the upper terminal is wider than the upper arm and the lower arm of the upper terminal. In addition, the terminal slot that accommodates the upper terminal and the terminal slot that accommodates the lower terminal both have inner and outer slot walls, and the width of the insulating body needs to be increased to form a accommodating space for the retaining portion. Therefore, it needs to be improved. Summary of the invention

[0007] The object of the present invention is to provide a card connector assembly to solve the problems raised in the above background technology.

[0008] To achieve the above purpose, the technical solution used in the present invention is: A card connector assembly, comprising: A first connector, comprising a first insulating body and a first terminal, wherein the first insulating body has a first longitudinal slot recessed downward from the top surface for inserting an electronic module and a longitudinal mounting slot recessed upward from the bottom surface and connected to the first slot, at least one first longitudinal side wall of at least one of the first longitudinal side walls on both sides of the first slot is provided with at least one first terminal slot with both the inner side and the bottom open in at least one local area, and the first terminal is fixed in the first terminal slot; A second connector, comprising a second insulating body and a plurality of second terminals, the second insulating body having a second slot recessed downward from the top surface, the second insulating body being installed in the mounting slot, the second slot being correspondingly connected to the first slot and for the electronic module to be inserted into, a plurality of continuous second terminal slots being respectively arranged in the second longitudinal side walls on both sides of the second slot, and a second terminal being fixed in each second terminal slot; The second terminals in the two second longitudinal side walls of the second insulating body and the first terminals in at least one local position of at least one first longitudinal side wall of the first insulating body form a structure in which the local positions are double-layer terminals and the remaining positions are single-layer terminals.

[0009] Furthermore, each of the first longitudinal side walls and the corresponding second longitudinal side wall are engaged with each other through a concave-convex structure and are fixed by heat melting at the engaging position of the concave-convex structure.

[0010] Furthermore, the concave-convex structure includes a concave structure arranged at the first longitudinal side wall and a convex structure arranged at the second longitudinal side wall. A hot melt block is arranged on the side of the concave structure, and the hot melt block combines the embedded concave structure and the convex structure into one when hot-melt.

[0011] Furthermore, the recessed structure includes a recessed groove 1 and a recessed groove 2 formed by recessing the bottom surface of the first longitudinal side wall, the top wall of the recessed groove 1 is higher than the top wall of the recessed groove 2, the recessed groove 2 is located on the inner side of the recessed groove 1 and penetrates the inner side surface of the first longitudinal side wall, and a hot melt block is provided on each side of the bottom surface of the first longitudinal side wall along the longitudinal direction of the first longitudinal side wall; the protruding structure includes a bump provided on the outer side surface of the second longitudinal side wall, the bump is located in the recessed groove 2 and extends into the recessed groove 1, the top outer end of the bump is connected to an upper bump, the upper bump is located in the recessed groove 1, there is a gap between the upper bump and the second longitudinal side wall, and an L-shaped structure is formed between the upper bump and the bumps.

[0012] Furthermore, the bottom surface of each of the first longitudinal side walls is provided with a plurality of recessed structures, which are spaced apart along the longitudinal direction of the first longitudinal side wall, and the outer surface of each of the second longitudinal side walls is provided with a plurality of protruding structures, which are spaced apart along the longitudinal direction of the second longitudinal side wall.

[0013] Furthermore, each of the first longitudinal side walls has a plurality of spaced-apart local areas, each local area is provided with at least one first terminal groove, the spacing between each two adjacent local areas is equal or unequal or partially equal, and at least one local area is provided between each two adjacent recessed structures.

[0014] Furthermore, a material removal groove is provided on the inner side surface of each of the first longitudinal side walls between each two adjacent local areas; the second longitudinal side wall is located below the top wall of the installation groove; and the longitudinal inner wall of the first slot is flush with the longitudinal inner wall of the second slot.

[0015] Furthermore, the first terminal is inserted upward from the bottom of the first insulating body and fixed in the first terminal groove; the second terminal is inserted upward from the bottom of the second insulating body and fixed in the second terminal groove.

[0016] Furthermore, a first fool-proofing portion connected between two first longitudinal side walls is provided in the first slot of the first insulating body, and a second fool-proofing portion connected between two second longitudinal side walls is provided in the second slot of the second insulating body, and the first fool-proofing portion is stacked above the second fool-proofing portion.

[0017] Furthermore, the first terminal and the second terminal both include a fixing portion, the fixing portion of the first terminal is located at the bottom of the first terminal slot, and the fixing portion of the second terminal is located at the bottom of the second terminal slot, the fixing portions extend upward and downward respectively to form an upper arm portion and a lower arm portion, the lower end of the lower arm portion is bent outward to form a welding portion, the welding portions of the first terminal and the second terminal are flush, the upper end of the upper arm portion of the first terminal protrudes toward the first slot side to form an upper contact portion, the upper end of the upper arm portion of the second terminal protrudes toward the second slot side to form a lower contact portion, and the upper contact portion is higher than the lower contact portion; the center of the top of the fixing portion of the first terminal is concave to form an embedding groove, and the two sides of the embedding groove are fixing arms, the fixing arm inside the embedding groove is connected to the lower end of the upper arm portion of the first terminal, the bottom of the first insulating body is concave to form a fixing groove, the fixing groove is connected to the bottom of the first terminal slot, and the fixing arm outside the embedding groove is embedded and fixed in the fixing groove.

[0018] Furthermore, at least one end of the first insulating body is provided with an ear buckle accommodating space and a pivoting portion pivotally connected to the ear buckle.

[0019] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in: by fixing the first terminal in the first insulating body to form the first connector, the second terminal is fixed in the second insulating body to form the second connector, and the second connector is inserted into the first connector, a structure is formed in which the local position is a double-layer terminal and the rest of the position is a single-layer terminal, and the inner side and the bottom of the first terminal groove are open, while maintaining the high-speed signal transmission speed, the width of the plug-in connector combination can be reduced, thereby reducing the space occupied by the plug-in connector combination; the first longitudinal side wall and the second longitudinal side wall are engaged by the concave-convex structure and fixed by hot melting at the engaging position of the concave-convex structure, which is not only convenient for assembly, but also makes the combination between the first connector and the second connector more stable by hot melting; by setting the material removal groove, the weight of the first insulating body can be reduced and the first insulating body can be prevented from warping; the inner side and the bottom of the first terminal groove are both set to be open and the fixing part of the first terminal is located at the bottom of the first terminal groove, and the fixing part of the first terminal is located at the open position at the bottom of the first terminal groove, and there is no need to increase the width of the first insulating body to form an accommodating space for the fixing part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional exploded view of the card connector assembly, the electronic module and the circuit board of the present invention; Figure 2 is a three-dimensional diagram of a card connector assembly; Figure 3 A three-dimensional diagram of another angle of the card connector assembly; Figure 4 Decomposition of the first connector and the second connector Figure 1 ; Figure 5 Decomposition of the first connector and the second connector Figure 2 ; Figure 6 The first insulating body is a three-dimensional Figure 1 ; Figure 7 The first insulating body is a three-dimensional Figure 2 ; Figure 8 The third insulating body Figure 1 ; Fig. 9 The third insulating body Figure 2 ; Fig.10 is a three-dimensional diagram of a first terminal; Fig.11 is a three-dimensional diagram of the second terminal; Fig.12 is a cross-sectional view of the first connector and the second connector in an exploded state; Fig.13 is a cross-sectional view of the first connector and the second connector in a combined state; Fig.14 is a cross-sectional view of the first insulating body; Fig.15 is a cross-sectional view of the combination of the first insulating body and the first terminal; Fig.16 is a cross-sectional view of the second insulating body; Fig.17 A cross-sectional view showing the combination of the second insulating body and the second terminal; Fig.18 for Fig.15 and Fig.17 Schematic diagram of the group together; Fig.19 It is a cross-sectional view of the position of the single-layer terminal when the first connector and the second connector are in the combined state.

[0021] Description of the accompanying drawings: first insulating body 1, first slot 11, mounting slot 12, first longitudinal side wall 13, material removal slot 131, first terminal slot 14, tower portion 15, first foolproof portion 16, fixing slot 17, hot melt portion 18, first terminal 2, first fixing portion 21, first upper arm portion 22, first lower arm portion 23, first welding portion 24, upper contact portion 25, embedding slot 26, fixing arm 27, first clamping point 271, ear buckle 3, metal lock structure 4, electric Sub-module 5, iron foot 6, circuit board 7, second insulating body 8, second slot 81, second longitudinal side wall 82, second terminal slot 83, second fool-proof portion 84, second terminal 9, second fixing portion 91, opening 911, second clamping point 912, second upper arm portion 92, second lower arm portion 93, second welding portion 94, lower contact portion 95, recessed structure a, recessed groove one a1, recessed groove two a2, protruding structure b, bump b1, upper bump b2, hot melt block c. DETAILED DESCRIPTION

[0022] In order to facilitate a better understanding of the purpose, structure, characteristics and effects of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods.

[0023] like Figure 1-19 As shown, the plug-in card connector assembly includes a first connector and a second connector.

[0024] The first connector includes a first insulating body 1 and a plurality of first terminals 2. The first insulating body 1 has a longitudinal first slot 11 recessed downward from the top surface for inserting an electronic module 5 and a longitudinal mounting slot 12 recessed upward from the bottom surface and connected to the first slot 11. Each of the first longitudinal side walls 13 on both sides of the first slot 11 has a plurality of spaced local areas, and each local area is provided with at least one first terminal slot 14 (some local areas have only one first terminal slot 14, and some local areas have multiple first terminal slots 14). The first terminal slot 14 is an open terminal slot opened on the inner side and the bottom of the inner side of the first longitudinal side wall 13, and a first terminal 2 is fixed in each first terminal slot 14. The spacing between each two adjacent local areas is equal, unequal, or partially equal. The inner side surface of each of the first longitudinal side walls 13 is provided with a cutout groove 131 between each two adjacent local areas. The cutout groove 131 is located on the top wall and two longitudinal groove walls of the mounting groove 12, which can reduce the weight of the first insulating body 1 and prevent the first insulating body 1 from warping.

[0025] A tower portion 15 is provided at both ends of the length direction of the first insulating body 1. Both ends of the first slot 11 extend into the tower portion 15. The tower portions 15 at both ends of the length direction of the first insulating body 1 are of different heights. The lower tower portion 15 of the first insulating body 1 has an ear button accommodating space and an ear button 3 is provided in the ear button accommodating space. The lower tower portion 15 has a pivoting portion pivotally connected to the ear button 3. The higher tower portion 15 is provided with a metal locking structure 4. The ear button 3 and the metal locking structure 4 form a single-sided ear button, which can save space occupied by opening the ear button. The ear button 3 and the metal locking structure 4 are buckled and fixed on both sides of the electronic module 5 inserted into the first slot 11 to fix the electronic module 5. An iron foot 6 is fixed at the bottom of the two tower portions 13 of the first insulating body 1, which is used to connect with the circuit board 7 to fix the first insulating body 1 to the circuit board 7. A first foolproof portion 16 connected between the two first longitudinal side walls 13 is disposed in the first slot 11 of the first insulating body 1, and the first foolproof portion 16 is close to the tower portion 15 with a lower height and away from the tower portion 15 with a higher height. A plurality of fixing grooves 17 are formed on both sides of the bottom of the first insulating body 1 along the longitudinal direction, and each fixing groove 17 is connected to the bottom of a first terminal groove 14.

[0026] The second connector includes a second insulating body 8 and a plurality of second terminals 9. The second insulating body 8 has a second longitudinal slot 81 that is recessed downward from the top surface. The second insulating body 8 is installed in the mounting groove 12. The second slot 81 is directly opposite to and connected to the first slot 11 and is used for inserting the electronic module 5. The longitudinal inner wall of the first slot 11 is flush with the longitudinal inner wall of the second slot 81. A plurality of continuous second terminal slots 83 are respectively arranged in the second longitudinal side walls 82 on both sides of the second slot 81, and the second terminal 9 is fixed in each second terminal slot 83. The second terminal slot 83 runs through the top surface of the second longitudinal side wall 82, the second slot surface and the bottom surface of the second insulating body 8. The second longitudinal side wall 82 is located below the top wall of the mounting groove 12. A second foolproofing portion 84 connected between the two second longitudinal side walls 82 is arranged in the second slot 81 of the second insulating body 8. The first foolproofing portion 16 is stacked above the second foolproofing portion 84. The first foolproofing portion 16 and the second foolproofing portion 84 are used to prevent the electronic module 5 from being reversely inserted.

[0027] Each first longitudinal side wall 13 of the first insulating body 1 and the corresponding second longitudinal side wall 82 of the second insulating body 8 are embedded through the concave-convex structure and fixed by heat melting at the embedding position of the concave-convex structure. The concave-convex structure includes a concave structure a arranged at the first longitudinal side wall 13 and a convex structure b arranged at the second longitudinal side wall 82. A hot melt block c is arranged on the side of the concave structure a. When the hot melt block c is hot melted, the embedded concave structure a and the convex structure b are combined into one.

[0028] The recessed structure a includes a recessed groove a1 and a recessed groove a2 formed on the bottom surface of the first longitudinal side wall 13, the top wall of the recessed groove a1 is higher than the top wall of the recessed groove a2, the recessed groove a2 is located on the inner side of the recessed groove a1 and passes through the inner side surface of the first longitudinal side wall 13, and the bottom surface of the first longitudinal side wall 13 is provided with a hot melt block c on both sides of the recessed groove a1 along the longitudinal direction of the first longitudinal side wall 13, and the two hot melt blocks c are hot-melted together to fix the protruding structure b; the protruding structure b includes a protrusion b1 arranged on the outer side surface of the second longitudinal side wall 82, the protrusion b1 is located in the recessed groove a2 and extends into the recessed groove a1, the top outer end of the protrusion b1 is connected with an upper protrusion b2, the upper protrusion b2 is located in the recessed groove a1, there is a gap between the upper protrusion b2 and the second longitudinal side wall 82, and an L-shaped structure is formed between the upper protrusion b2 and the protrusion b1.

[0029] There are multiple recessed structures a disposed on the bottom surface of each of the first longitudinal side walls 13, and the multiple recessed structures a are spaced apart along the longitudinal direction of the first longitudinal side wall 13, and two local areas are disposed between each two adjacent recessed structures a; there are multiple protruding structures b disposed on the outer side surface of each of the second longitudinal side walls 82, and the multiple protruding structures b are spaced apart along the longitudinal direction of the second longitudinal side wall 82. The first connector and the second connector are firmly combined together by the one-to-one matching of the multiple recessed structures a and the multiple protruding structures b.

[0030] The second terminals 9 in the two second longitudinal side walls 82 of the second insulating body 8 and the first terminals 2 in multiple local positions of the two first longitudinal side walls 13 of the first insulating body 1 form a structure in which multiple local positions are double-layer terminals and the remaining positions are single-layer terminals.

[0031] The first terminals 2 are inserted and fixed in the first terminal grooves 14 from the bottom of the first insulating body 1 upwards, and the structures of the first terminals 2 are the same. The first terminals 2 in the first longitudinal side walls 13 are flush and form a row; the second terminals 9 are inserted and fixed in the second terminal grooves 83 from the bottom of the second insulating body 8 upwards, and the structures of the second terminals 9 are the same. The second terminals 9 in the second longitudinal side walls 82 are flush and form a row.

[0032] The first terminal 2 comprises a first fixing portion 21, which is located at the bottom of the first terminal slot 14. The first fixing portion 21 extends upward and downward to form a first upper arm portion 22 and a first lower arm portion 23, respectively. The lower end of the first lower arm portion 23 is bent outward to form a first welding portion 24, and the upper end of the first upper arm portion 22 protrudes toward the first slot side to form an upper contact portion 25. The center of the top of the first fixing portion 21 is concave to form an embedding groove 26, and the two sides of the embedding groove 26 are fixed arms 27. The fixed arm 27 on the inner side of the embedding groove 26 is connected to the lower end of the first upper arm portion 22, and the fixed arm 27 on the outer side of the embedding groove 26 is embedded and fixed in the fixing groove 17. The inner and outer sides of the fixed arm 27 protrude to form a first clamping point 271, and the first clamping points 271 on both sides are clamped on the inner and outer side walls of the fixing groove 17. The bottom surface of the first insulating body 1 is provided with raised hot-melt portions 18 on both sides of the first fixing portion 21, and the hot-melt portions 18 on both sides are hot-melted to further fix the first fixing portion 21.

[0033] The second terminal 9 includes a second fixing portion 91, which is located at the bottom of the second terminal groove 83. The second fixing portion 91 extends upward and downward to form a second upper arm portion 92 and a second lower arm portion 93 respectively. The lower end of the second lower arm portion 93 is bent outward to form a second welding portion 94. The first welding portion 24 of the first terminal 2 is flush with the second welding portion 94 of the second terminal 9. The upper end of the second upper arm portion 92 protrudes toward the second slot side to form a lower contact portion 95. The upper contact portion 25 is higher than the lower contact portion 95. An opening 911 is opened on the second fixing portion 91. The inner side of the second fixing portion 91 protrudes to form a second clamping point 912, and the second clamping point 912 is clamped on the inner wall of the second terminal groove 83.

[0034] Compared with the prior art, the beneficial effects of the present invention are mainly reflected in: the first connector is formed by fixing the first terminal 2 in the first insulating body 1, the second terminal 9 is fixed in the second insulating body 8 to form the second connector, and the second connector is inserted into the first connector to form a structure in which a local position is a double-layer terminal and the rest of the position is a single-layer terminal, and the inner side and the bottom of the first terminal groove 14 are open, while maintaining the high-speed signal transmission speed, the width of the card connector assembly can be reduced, thereby reducing the space occupied by the card connector assembly; the first longitudinal side wall 13 and the second longitudinal side wall 82 are recessed The convex structure is engaged and fixed by hot melting at the concave and convex structure, which is not only convenient for assembly, but also makes the connection between the first connector and the second connector more stable by hot melting; by setting the material groove 131, the weight of the first insulating body 1 can be reduced and the first insulating body 1 can be prevented from warping; the inner side and the bottom of the first terminal groove 14 are set to be open and the fixing part of the first terminal 2 is located at the bottom of the first terminal groove 14, and the first fixing part 21 of the first terminal 2 is located at the open position at the bottom of the first terminal groove 14, and there is no need to increase the width of the first insulating body 1 to form an accommodating space for the first fixing part 21.

[0035] In other embodiments, the two towers 15 of the first insulating body 1 have the same height and are both provided with ear buckles 3. The two ear buckles 3 are respectively fastened and fixed on two sides of the electronic module 5 inserted into the slot 11 to fix the electronic module 5.

[0036] In other embodiments, only one local area is provided in one first longitudinal side wall 13, and one or more first terminal grooves 14 are provided in the local area. Alternatively, only one first longitudinal side wall 13 is provided with multiple local areas, and one or more first terminal grooves 14 are provided in each local area.

[0037] In other embodiments, one, three or more local areas may be arranged between every two adjacent recess structures a.

[0038] In other embodiments, the tower portion 15 , the ear buckle accommodating space and the pivoting portion for pivotally connecting the ear buckle may not be provided at both ends of the first insulating body 1 .

[0039] The present invention has been described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A card connector assembly, characterized in that: include: A first connector, comprising a first insulating body and a first terminal, wherein the first insulating body has a first longitudinal slot recessed downward from the top surface for inserting an electronic module and a longitudinal mounting slot recessed upward from the bottom surface and connected to the first slot, at least one first longitudinal side wall of at least one of the first longitudinal side walls on both sides of the first slot is provided with at least one first terminal slot with both the inner side and the bottom open in at least one local area, and the first terminal is fixed in the first terminal slot; A second connector, comprising a second insulating body and a plurality of second terminals, the second insulating body having a second slot recessed downward from the top surface, the second insulating body being installed in the mounting slot, the second slot being correspondingly connected to the first slot and for the electronic module to be inserted into, a plurality of continuous second terminal slots being respectively arranged in the second longitudinal side walls on both sides of the second slot, and a second terminal being fixed in each second terminal slot; The second terminals in the two second longitudinal side walls of the second insulating body and the first terminals in at least one local position of at least one first longitudinal side wall of the first insulating body form a structure in which the local positions are double-layer terminals and the remaining positions are single-layer terminals.

2. The card connector assembly according to claim 1, characterized in that: Each of the first longitudinal side walls and the corresponding second longitudinal side wall is embedded in the concave-convex structure and is fixed by heat melting at the embedding position of the concave-convex structure.

3. The card connector assembly according to claim 2, characterized in that: The concave-convex structure includes a concave structure arranged at the first longitudinal side wall and a convex structure arranged at the second longitudinal side wall. A hot melt block is arranged on the side of the concave structure. When the hot melt block is hot-melted, the embedded concave structure and the convex structure are combined into one.

4. The card connector assembly according to claim 3, characterized in that: The recessed structure includes a recessed groove 1 and a recessed groove 2 formed by recessing the bottom surface of the first longitudinal side wall. The top wall of the recessed groove 1 is higher than the top wall of the recessed groove 2. The recessed groove 2 is located on the inner side of the recessed groove 1 and penetrates the inner side surface of the first longitudinal side wall. The bottom surface of the first longitudinal side wall is provided with a hot melt block on both sides of the recessed groove 1 along the longitudinal direction of the first longitudinal side wall; the protruding structure includes a convex block arranged on the outer side surface of the second longitudinal side wall, the convex block is located in the recessed groove 2 and extends into the recessed groove 1, the top outer end of the convex block is connected to an upper convex block, the upper convex block is located in the recessed groove 1, there is a gap between the upper convex block and the second longitudinal side wall, and an L-shaped structure is formed between the upper convex block and the convex blocks.

5. The card connector assembly according to claim 3 or 4, characterized in that: The bottom surface of each of the first longitudinal side walls is provided with a plurality of recessed structures, which are spaced apart along the longitudinal direction of the first longitudinal side wall; the outer surface of each of the second longitudinal side walls is provided with a plurality of protruding structures, which are spaced apart along the longitudinal direction of the second longitudinal side wall.

6. The card connector assembly according to claim 5, characterized in that: Each of the first longitudinal side walls has a plurality of local areas spaced apart from each other, each local area is provided with at least one first terminal groove, the spacing between each two adjacent local areas is equal or unequal or partially equal, and at least one local area is provided between each two adjacent recessed structures.

7. The card connector assembly according to claim 6, characterized in that: The inner side surface of each of the first longitudinal side walls is provided with a material cutting groove between each two adjacent local areas; the second longitudinal side wall is located below the top wall of the installation groove; the longitudinal inner wall of the first slot is flush with the longitudinal inner wall of the second slot.

8. The card connector assembly according to claim 1 or 2 or 3 or 4 or 6 or 7, characterized in that: The first terminal is inserted upward from the bottom of the first insulating body and fixed in the first terminal groove; the second terminal is inserted upward from the bottom of the second insulating body and fixed in the second terminal groove.

9. The card connector assembly according to claim 8, characterized in that: A first fool-proofing portion connected between two first longitudinal side walls is arranged in the first slot of the first insulating body, a second fool-proofing portion connected between two second longitudinal side walls is arranged in the second slot of the second insulating body, and the first fool-proofing portion is stacked above the second fool-proofing portion.

10. The card connector assembly according to claim 8, characterized in that: The first terminal and the second terminal both include a fixing portion, the fixing portion of the first terminal is located at the bottom of the first terminal slot, the fixing portion of the second terminal is located at the bottom of the second terminal slot, the fixing portions extend upward and downward respectively to form an upper arm portion and a lower arm portion, the lower end of the lower arm portion is bent outward to form a welding portion, the welding portions of the first terminal and the second terminal are flush, the upper end of the upper arm portion of the first terminal protrudes toward the first slot side to form an upper contact portion, the upper end of the upper arm portion of the second terminal protrudes toward the second slot side to form a lower contact portion, and the upper contact portion is higher than the lower contact portion; the center of the top of the fixing portion of the first terminal is concave to form an embedding groove, the two sides of the embedding groove are fixing arms, the fixing arm inside the embedding groove is connected to the lower end of the upper arm portion of the first terminal, the bottom of the first insulating body is concave to form a fixing groove, the fixing groove is connected to the bottom of the first terminal slot, and the fixing arm outside the embedding groove is embedded and fixed in the fixing groove.

11. The card connector assembly according to claim 1 or 2 or 3 or 4 or 6 or 7 or 9 or 10, characterized in that: At least one end of the first insulating body is provided with an ear buckle accommodating space and a pivoting portion pivotally connected to the ear buckle.

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