High-density connector with low insertion force

Abstract

The utility model provides a kind of high-density connector of low insertion force, including an insulating body, with the insertion of an electronic module One length slot, the length side wall of both sides of slot is respectively provided with multiple terminal slots in;Multiple terminals are respectively one-to-one corresponding and are received in the corresponding terminal slot in two length side walls, and at least a part of terminal slot is provided with double-layer terminal, and the rest terminal slot is single-layer terminal;Each terminal includes guide part, contact part, fixed part and welding part;Guide part is used to guide electronic module to be inserted into slot so that the terminal of both sides of slot is opened by electronic module, contact part is inserted into slot and contacts with electronic module, fixed part is fixed in the terminal slot of insulating body, each terminal is formed by sheet metal stamping, the contact point surface of the contact part of each terminal and electronic module is sheet metal stamping cutting surface, and the guide surface of each guide part is arc-shaped;The high-density connector of low insertion force can make electronic module plugging operation more easily.

Description

Technical Field

[0001] This utility model belongs to the field of connectors, specifically relating to a high-density connector with low insertion force. Background Technology

[0002] Chinese patent CN202411745993.5 discloses a high-speed communication storage electrical connector, including an insulating body and multiple terminals housed within the insulating body.

[0003] The top surface of the insulating body is recessed in the middle along the longitudinal direction to form a longitudinal slot for inserting an electronic module (electronic card). The slot has longitudinal sidewalls arranged along the length of the slot on both sides, and multiple terminal slots are provided on the longitudinal sidewalls on both sides of the slot.

[0004] Multiple terminals are respectively housed in corresponding terminal slots within the two longitudinal sidewalls. Some terminals within each longitudinal sidewall are configured as double-layer terminals, meaning at least a portion of the terminal slots contain double-layer terminals, while the remaining slots contain single-layer terminals. The double-layer terminals include a lower layer terminal and an upper layer terminal. The upper layer terminal of the double-layer terminal is inserted and fixed into the terminal slot from the top of the insulating body downwards, while the lower layer terminal of the double-layer terminal is inserted and fixed into the terminal slot from the bottom of the insulating body upwards. The single-layer terminals are inserted and fixed into the terminal slot from the bottom of the insulating body upwards, and each single-layer terminal is flush with the lower layer terminal and forms a row.

[0005] Both the upper and lower terminals include a fixing part that is fixed in the corresponding terminal slot. The fixing part extends upward and downward to form an upper arm and a lower arm, respectively. The lower end of the lower arm is bent towards the inside of the insulating body to form a welding part. The upper end of the upper arm of the lower terminal protrudes towards the slot to form a contact part. The upper end of the upper arm of the upper terminal extends towards the slot to form an upper inclined arm. The end of the upper inclined arm is bent downward to form a lower inclined contact arm. The end of the lower inclined contact arm is a contact end that extends into the slot.

[0006] The aforementioned high-speed communication storage connector increases the number of terminals by partially setting double-layer terminals, thereby increasing the signal transmission channels and significantly improving signal transmission speed. However, the increased number of terminals leads to increased mechanical insertion and extraction force, making it difficult to insert and remove electronic cards. Therefore, improvements are needed. Utility Model Content

[0007] The purpose of this invention is to provide a high-density connector with low insertion force to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the technical solution used in this utility model is as follows:

[0009] A high-density connector with low insertion force, comprising:

[0010] An insulating body has a longitudinally elongated slot recessed from top to bottom for inserting an electronic module, and multiple terminal slots are respectively provided in the longitudinally elongated sidewalls on both sides of the slot.

[0011] Multiple terminals are respectively housed in corresponding terminal slots within the two longitudinal side walls. At least a portion of the terminal slots contain double-layer terminals, while the remaining terminal slots contain single-layer terminals. Each terminal includes a guide portion, a contact portion, a fixing portion, and a soldering portion. The guide portion guides the electronic module into the slot so that the terminals on both sides of the slot are opened by the electronic module. The contact portion extends into the slot and contacts the electronic module. The fixing portion is fixed in the terminal slot of the insulating body. The soldering portion extends out of the bottom of the insulating body and is soldered to a circuit board. Each terminal is formed by stamping metal sheet. The contact point surface of each terminal's contact portion that contacts the electronic module is the stamped and cut surface of the metal sheet. The guide surface of each guide portion is arc-shaped.

[0012] Furthermore, the double-layer terminal includes a lower layer terminal and an upper layer terminal. The upper layer terminal is inserted and fixed in the terminal slot from the side away from the slot in the width direction of the insulating body to the side closer to the slot. The lower layer terminal is inserted and fixed in the terminal slot from the bottom of the insulating body upwards. The single-layer terminal is inserted and fixed in the terminal slot from the bottom of the insulating body upwards or from the side away from the slot in the width direction of the insulating body to the side closer to the slot.

[0013] Furthermore, when the single-layer terminals are inserted and fixed in the terminal slots from the bottom of the insulating body upwards, each single-layer terminal is flush with the lower layer terminal and forms a row. At the position of the single-layer terminal, the terminal slot that receives each single-layer terminal penetrates the slot-facing surface of the longitudinal sidewall and the bottom surface of the insulating body, and the top of the terminal slot that receives each single-layer terminal is a closed end. At the position of the double-layer terminal, the terminal slot that receives each lower layer terminal penetrates the slot-facing surface of the longitudinal sidewall and the bottom surface of the insulating body, and the terminal slot that receives each upper layer terminal penetrates the slot-facing surface and the surface away from the slot in the width direction of the longitudinal sidewall. The top of the terminal slot that receives each lower layer terminal and the top of the terminal slot that receives each upper layer terminal are both closed ends.

[0014] Furthermore, the top surface of each of the longitudinal sidewalls is provided with a material extraction groove at the position corresponding to each single-layer terminal. The inner side of the material extraction groove is a retaining wall located above the terminal slot that receives the single-layer terminal. The upper end of the retaining wall is flush with the top surface of the longitudinal sidewall. The inner bottom of the material extraction groove is connected to the outer top of the corresponding terminal slot that receives the single-layer terminal through a clearance groove.

[0015] Furthermore, at the position of the double-layer terminals, the terminal slots that accommodate each lower-layer terminal and the terminal slots that accommodate each upper-layer terminal are separated by a partition wall. The partition wall includes a horizontal wall located above the terminal slot that accommodates a single-layer terminal and a vertical wall located outside the terminal slot that accommodates a single-layer terminal. The upper end of the vertical wall is connected to the lower end of the horizontal wall as a whole. There is a second clearance groove between the upper end of the horizontal wall and the top surface of the longitudinal sidewall. The second clearance groove communicates with the slot. The outer side of the vertical wall is a through groove that penetrates the longitudinal sidewall away from the slot surface and the bottom surface of the longitudinal sidewall. The through groove and the second clearance groove constitute the terminal slot that accommodates the upper-layer terminal.

[0016] Furthermore, the surface of each longitudinal sidewall away from the slot is recessed near the bottom surface of the longitudinal sidewall to form a groove. The groove is arranged along the longitudinal direction of the longitudinal sidewall and is connected to the through groove.

[0017] Furthermore, the outer side of the vertical wall is recessed to form a groove, and the fixing part of the upper terminal is fixed in the groove; the fixing part of the upper terminal extends upward to form a vertical lever arm, the vertical lever arm bends and extends towards the slot to form a horizontal lever arm, the end of the horizontal lever arm is the contact part, the contact part bends upward to form the guide part, the guide part is connected to a connecting part, the connecting part is connected at the junction of the horizontal lever arm and the vertical lever arm, and the horizontal lever arm, the contact part, the guide part and the connecting part form a closed loop shape.

[0018] Furthermore, the double-layer terminal includes an upper terminal and a lower terminal. In the position of the double-layer terminal, a lower terminal and an upper terminal in each terminal slot are embedded together with a plug fixed in the terminal slot. In the position of the single-layer terminal, each single-layer terminal is fixed in the corresponding terminal slot from the bottom of the insulating body upward by insertion, or a single-layer terminal in each terminal slot is embedded together with a plug fixed in the terminal slot.

[0019] Furthermore, the double-layer terminal includes an upper layer terminal and a lower layer terminal. The upper layer terminal is inserted and fixed in the terminal slot from the top of the insulating body downwards, and the lower layer terminal is inserted and fixed in the terminal slot from the bottom of the insulating body upwards. The single-layer terminal is inserted and fixed in the terminal slot from the bottom of the insulating body upwards or from the top of the insulating body downwards.

[0020] Furthermore, at least one end of the insulating body is provided with an ear clip receiving space and a pivot portion for pivotally connecting the ear clip; at least one ear clip is pivotally connected to one end of the insulating body.

[0021] Furthermore, the other end of the insulating body is provided with a metal locking structure for locking the electronic module, and the metal locking structure has a spring-loaded anti-retraction structure.

[0022] Compared with the prior art, the main advantages of this utility model are: by designing the guide surface of each terminal guide part as an arc shape on the basis of double-layer terminals, the signal transmission channel is increased, the signal transmission speed is greatly improved, and the force required to insert and remove the electronic module from the slot is greatly reduced, making the electronic module insertion and removal operation easier. Attached Figure Description

[0023] Figure 1 This is an exploded perspective view of the high-density connector with low insertion force according to this utility model.

[0024] Figure 2 Three-dimensional high-density connectors with low insertion force Figure 1 ;

[0025] Figure 3 Three-dimensional high-density connectors with low insertion force Figure 2 ;

[0026] Figure 4 for Figure 1 The three-dimensional insulating body in Figure 1 ;

[0027] Figure 5 for Figure 1 The three-dimensional insulating body in Figure 2 ;

[0028] Figure 6 for Figure 1 A three-dimensional view of the terminals in the diagram;

[0029] Figure 7 for Figure 6 The front view;

[0030] Figure 8 A cross-sectional view of a high-density connector with low insertion force at a single-layer terminal;

[0031] Figure 9 This is a cross-sectional view of a high-density connector with low insertion force at the double-layer terminals.

[0032] Reference numerals: 1. Insulating body, 11. Slot, 12. Longitudinal side wall, 13. Tower, 14. Terminal slot, 15. Foolproof part, 16. Material scooping slot, 17. Relief slot 1, 18. Divider wall, 19. Horizontal wall, 191. Vertical wall, 192. Relief slot 2, 1a. Through slot, 1b. Groove, 1c. Embedded slot, 1d. Terminal, 21. Fixing part, 211. Opening, 22. Upper arm, 23. Lower arm, 24. Welding part, 25. Contact part, 26. Guide part, 27. Lateral lever arm, 28. Connecting part, 4. Ear clip, 5. Metal locking structure, 6. Electronic module, 7. Iron foot, 8. Circuit board. Detailed Implementation

[0033] To facilitate a better understanding of the purpose, structure, features, and effects of this utility model, the present utility model will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0034] like Figure 1-9 As shown, the low-insertion-force high-density connector includes an insulating body 1 and a plurality of terminals 2 housed within the insulating body 1.

[0035] The top surface of the insulating body 1 is recessed in the middle along its longitudinal direction to form a longitudinally elongated slot 11. A tower portion 13 is provided at both ends of the insulating body 1 along its length. The ends of the slot 11 extend into the tower portions 13, and the tower portions 13 at the two ends of the insulating body 1 are at different heights. The tower portion 13 with the lower height has a space for receiving ear clips and a pivot portion for connecting the ear clips, and is equipped with an ear clip 4. The tower portion 13 with the higher height is equipped with a metal locking structure 5. The ear clip 4 and the metal locking structure 5 form a single-sided ear clip, which saves space occupied when the ear clip is opened. The ear clip 4 and the metal locking structure 5 are fastened and fixed to both sides of the electronic module 6 inserted into the slot 11 to secure the electronic module 6. A metal foot 7 is fixed to the bottom of each of the two tower portions 13 of the insulating body 1 for connecting to the circuit board 8 to fix the insulating body 1 to the circuit board 8.

[0036] The slot 11 has longitudinal sidewalls 12 arranged along its length on both sides. Each longitudinal sidewall 12 on both sides of the slot 11 is provided with multiple terminal slots 14. The terminal slots 14 penetrate the bottom surface of the insulating body 1 and also penetrate the slot-facing surface of the longitudinal sidewall 12. None of the terminal slots 14 penetrate the top surface of the longitudinal sidewall 12. The multiple terminals 2 are respectively housed in the corresponding terminal slots 14 within the two longitudinal sidewalls 12. Some of the terminals 2 within each longitudinal sidewall 12 are configured as double-layer terminals, meaning that at least a portion of the terminal slots 14 are equipped with double-layer terminals (this can be either a single terminal slot 14 on one or two longitudinal sidewalls 12, or multiple spaced terminal slots 14 on one or two longitudinal sidewalls 12 equipped with double-layer terminals), while the remaining terminal slots 14 are single-layer terminals.

[0037] The slot 11 is provided with a foolproof part 15 connecting the two longitudinal side walls 12. The foolproof part 15 divides the slot 11 into slot one and slot two, which is shorter than slot one. The foolproof part 15 is close to the lower tower part 13. The foolproof part 15 is used to prevent the electronic module 6 from being inserted in reverse.

[0038] The double-layer terminal includes a lower layer terminal and an upper layer terminal. The upper layer terminal of the double-layer terminal is inserted and fixed in the terminal slot 14 from the side away from the slot in the width direction of the insulating body 1 towards the side closer to the slot. The lower layer terminal of the double-layer terminal is inserted and fixed in the terminal slot 14 from the bottom of the insulating body 1 upwards. The single-layer terminal is inserted and fixed in the terminal slot 14 from the bottom of the insulating body 1 upwards. Each single-layer terminal is flush with the lower layer terminal and forms a row. Each single-layer terminal has the same structure as the lower layer terminal, but the structure of each single-layer terminal is different from that of the upper layer terminal.

[0039] In the position of a single-layer terminal, the terminal groove 14 that houses each single-layer terminal penetrates the slot-facing surface of the longitudinal sidewall 12 and the bottom surface of the insulating body 1, and the top end of the terminal groove 14 that houses each single-layer terminal is a closed end; in the position of a double-layer terminal, the terminal groove 14 that houses each lower-layer terminal penetrates the slot-facing surface of the longitudinal sidewall 12 and the bottom surface of the insulating body 1, and the terminal groove 14 that houses each upper-layer terminal penetrates the slot-facing surface and the surface away from the slot in the width direction of the longitudinal sidewall 12, and the top end of the terminal groove 14 that houses each lower-layer terminal and the top end of the terminal groove 14 that houses each upper-layer terminal are both closed ends.

[0040] Each of the longitudinal sidewalls 12 has a material extraction groove 16 on its top surface at the position corresponding to each single-layer terminal. The design of the material extraction groove 16 not only saves materials and reduces the weight of the insulating body 1, but also prevents the insulating body 1 from warping and facilitates mold forming. The inner side of the material extraction groove 16 is a retaining wall 17 located above the terminal slot 14 that accommodates the single-layer terminal. The upper end of the retaining wall 17 is flush with the top surface of the longitudinal sidewall 12. The inner bottom of the material extraction groove 16 is connected to the outer top of the corresponding terminal slot 14 that accommodates the single-layer terminal through a relief groove 18.

[0041] At the location of the double-layer terminals, the terminal slot 14 accommodating each lower-layer terminal and the terminal slot 14 accommodating each upper-layer terminal are separated by a partition wall 19. The partition wall 19 includes a horizontal wall 191 located above the terminal slot 14 accommodating a single-layer terminal and a vertical wall 192 located outside the terminal slot 14 accommodating a single-layer terminal. The upper end of the vertical wall 192 is connected to the lower end of the horizontal wall 191 as a single unit. There is a clearance groove 1a between the upper end of the horizontal wall 191 and the top surface of the longitudinal side wall 12. The clearance groove 1a communicates with the slot 11. The outer side of the vertical wall 192 is a through groove 1b that penetrates the longitudinal side wall 12 away from the slot surface and the bottom surface of the longitudinal side wall 12. The through groove 1b and the clearance groove 1a constitute the terminal slot 14 accommodating the upper-layer terminal. The outer side of the vertical wall 192 is recessed to form a recess 1d, and the upper-layer terminal is held and fixed in the recess 1d on the slot side.

[0042] The surface of each longitudinal sidewall 12 away from the slot is recessed near the bottom surface of the longitudinal sidewall 12 to form a groove 1c. The groove 1c is arranged along the longitudinal direction of the longitudinal sidewall 12 and is connected to the through groove 1b.

[0043] The upper, lower, and single-layer terminals are all formed by stamping metal sheets. The contact point of each terminal contacting the electronic module is the stamping cut surface of the metal sheet. Each upper, lower, and single-layer terminal includes a fixing part 21 fixed in the corresponding terminal slot 14. The fixing part 21 has an opening 211. The fixing part 21 extends upward and downward to form an upper arm 22 (vertical lever arm) and a lower arm 23, respectively. The lower end of the lower arm 23 bends outward toward the outside of the insulating body 1 to form a welding part 24 of the lower terminal. The welding part 24 of the single-layer terminal faces the same direction as the welding part 24 of the lower terminal. The upper end of the upper arm 22 of the lower and single-layer terminals protrudes toward the slot 11 to form a contact part 25. The upper end of the contact part 25 of the lower and single-layer terminals is a guide part 26. The guide surface of the guide part 26 is arc-shaped and is also the stamping cut surface of the metal sheet.

[0044] The fixing part 21 of the upper terminal is embedded and fixed (clamped) in the groove 1d. The upper arm part 22 (vertical arm) of the upper terminal bends and extends towards the slot 11 to form a horizontal arm 27. The end of the horizontal arm 27 is a contact part 25. The contact part 25 bends upward to form the guide part 26 of the upper terminal. The guide surface of the guide part 26 is arc-shaped and is also a metal sheet stamping and cutting surface. The guide part 26 of the upper terminal is connected to a connecting part 28. The connecting part 28 is connected at the junction of the horizontal arm 27 and the vertical arm. The horizontal arm 27, the contact part 25, the guide part 26 and the connecting part 28 of the upper terminal form a closed loop shape.

[0045] The contact portion 25 of the upper terminal is higher than the contact portion 25 of the lower terminal. The welding portion 24 of the upper terminal is flush with the welding portion 24 of the lower terminal. The welding portion 24 of the upper terminal and the welding portion 24 of the lower terminal have the same orientation (both facing outwards). The welding portion 24 of the single-layer terminal has the same orientation as the welding portion 24 of the lower terminal (both facing outwards).

[0046] The soldering portions 24 of the upper terminal, lower terminal, and single-layer terminal extend out of the bottom of the insulating body 1 and are soldered to a circuit board 8. The guide portions 26 of the terminals 2 on both sides of the slot 11 are used to guide the electronic module 6 into the slot 11 so that the terminals 2 on both sides of the slot 11 are opened by the electronic module 6. The contact portions 25 of the upper terminal, lower terminal, and single-layer terminal extend into the slot 11 and contact the electronic module 6.

[0047] Compared with the prior art, the main advantages of this utility model are: by designing the guide surface of the guide part 26 of each terminal as an arc shape on the basis of the double-layer terminal, the signal transmission channel is increased, the signal transmission speed is greatly improved, and the force of inserting the electronic module into the slot and pulling it out of the slot is greatly reduced, making the electronic module insertion and removal operation easier.

[0048] In other embodiments, each terminal slot 14 is designed to penetrate both the top and bottom surfaces of the longitudinal sidewall 12 and the slot-facing surface of the longitudinal sidewall 12. The double-layer terminal includes an upper terminal and a lower terminal. In the position of the double-layer terminal, a lower terminal and an upper terminal in each terminal slot 14 are embedded together with a plug fixed in the terminal slot 14. The plug is inserted and fixed in the corresponding terminal slot 14 from the bottom of the insulating body 1 upwards. In the position of the single-layer terminal, each single-layer terminal is fixed in the corresponding terminal slot 14 from the bottom of the insulating body 1 upwards by insertion. Alternatively, a single-layer terminal in each terminal slot 14 is embedded together with a plug fixed in the terminal slot 14. The plug is inserted and fixed in the corresponding terminal slot 14 from the bottom of the insulating body 1 upwards.

[0049] In other embodiments, each terminal slot 14 is designed to penetrate the top and bottom surfaces of the longitudinal sidewall 12 and the slot surface of the longitudinal sidewall 12. The double-layer terminal includes an upper terminal and a lower terminal. The upper terminal is inserted and fixed in the terminal slot 14 from the top of the insulating body 1 downwards, and the lower terminal is inserted and fixed in the terminal slot 14 from the bottom of the insulating body 1 upwards. The single-layer terminal is inserted and fixed in the terminal slot 14 from the bottom of the insulating body 1 upwards or from the top of the insulating body 1 downwards.

[0050] In other embodiments, the two tower sections 13 of the insulating body 1 can be set at the same height and each is provided with a latch 4. The two latches 4 are respectively fastened and fixed to both sides of the electronic module 6 in the insertion slot 11 to fix the electronic module 6.

[0051] The present invention has been described above in conjunction with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations made in accordance with the essence of the present invention.

Claims

1. A high-density connector with low insertion force, characterized in that, include: An insulating body has a longitudinally elongated slot recessed from top to bottom for inserting an electronic module, and multiple terminal slots are respectively provided in the longitudinally elongated sidewalls on both sides of the slot. Multiple terminals are respectively housed in corresponding terminal slots within the two longitudinal side walls. At least a portion of the terminal slots contain double-layer terminals, while the remaining terminal slots contain single-layer terminals. Each terminal includes a guide portion, a contact portion, a fixing portion, and a soldering portion. The guide portion guides the electronic module into the slot so that the terminals on both sides of the slot are opened by the electronic module. The contact portion extends into the slot and contacts the electronic module. The fixing portion is fixed in the terminal slot of the insulating body. The soldering portion extends out of the bottom of the insulating body and is soldered to a circuit board. Each terminal is formed by stamping metal sheet. The contact point surface of each terminal's contact portion that contacts the electronic module is the stamped and cut surface of the metal sheet. The guide surface of each guide portion is arc-shaped.

2. The high-density connector with low insertion force according to claim 1, characterized in that: The double-layer terminal includes a lower layer terminal and an upper layer terminal. The upper layer terminal is inserted and fixed in the terminal slot from the side away from the slot in the width direction of the insulating body to the side closer to the slot. The lower layer terminal is inserted and fixed in the terminal slot from the bottom of the insulating body upwards. The single-layer terminal is inserted and fixed in the terminal slot from the bottom of the insulating body upwards or from the side away from the slot in the width direction of the insulating body to the side closer to the slot.

3. The high-density connector with low insertion force according to claim 2, characterized in that: When the single-layer terminals are inserted and fixed in the terminal slots from the bottom of the insulating body upwards, each single-layer terminal is flush with the lower layer terminal and forms a row. At the position of the single-layer terminal, the terminal slot that receives each single-layer terminal penetrates the slot-facing surface of the longitudinal sidewall and the bottom surface of the insulating body, and the top of the terminal slot that receives each single-layer terminal is a closed end. At the position of the double-layer terminal, the terminal slot that receives each lower layer terminal penetrates the slot-facing surface of the longitudinal sidewall and the bottom surface of the insulating body, and the terminal slot that receives each upper layer terminal penetrates the slot-facing surface and the surface away from the slot in the width direction of the longitudinal sidewall. The top of the terminal slot that receives each lower layer terminal and the top of the terminal slot that receives each upper layer terminal are both closed ends.

4. The high-density connector with low insertion force according to claim 3, characterized in that: Each of the longitudinal sidewalls has a material chute on its top surface at the position corresponding to each single-layer terminal. The inner side of the material chute is a retaining wall above the terminal slot that receives the single-layer terminal. The upper end of the retaining wall is flush with the top surface of the longitudinal sidewall. The inner bottom of the material chute is connected to the outer top of the corresponding terminal slot that receives the single-layer terminal through a clearance groove.

5. The high-density connector with low insertion force according to claim 3, characterized in that: At the location of the double-layer terminals, the terminal slots that accommodate the lower-layer terminals and the terminal slots that accommodate the upper-layer terminals are separated by a partition wall. The partition wall includes a horizontal wall located above the terminal slots that accommodate the single-layer terminals and a vertical wall located outside the terminal slots that accommodate the single-layer terminals. The upper end of the vertical wall is connected to the lower end of the horizontal wall as a whole. There is a second clearance groove between the upper end of the horizontal wall and the top surface of the longitudinal side wall. The second clearance groove communicates with the slot. The outer side of the vertical wall is a through groove that penetrates the longitudinal side wall away from the slot surface and the bottom surface of the longitudinal side wall. The through groove and the second clearance groove constitute the terminal slot that accommodates the upper-layer terminals.

6. The high-density connector with low insertion force according to claim 5, characterized in that: The surface of each longitudinal sidewall away from the slot is recessed near the bottom surface of the longitudinal sidewall to form a groove. The groove is arranged along the longitudinal direction of the longitudinal sidewall and is connected to the through groove.

7. The high-density connector with low insertion force according to claim 5, characterized in that: The outer side of the vertical wall is recessed to form a groove, and the fixing part of the upper terminal is fixed in the groove. The fixing part of the upper terminal extends upward to form a vertical lever arm, and the vertical lever arm bends and extends towards the slot to form a horizontal lever arm. The end of the horizontal lever arm is the contact part, and the contact part bends upward to form the guide part. The guide part is connected to a connecting part, and the connecting part is connected at the junction of the horizontal lever arm and the vertical lever arm. The horizontal lever arm, the contact part, the guide part and the connecting part form a closed loop shape.

8. The high-density connector with low insertion force according to claim 1, characterized in that: The double-layer terminal includes an upper layer terminal and a lower layer terminal. In the position of the double-layer terminal, a lower layer terminal and an upper layer terminal in each terminal slot are embedded together with a plug fixed in the terminal slot. In the position of the single-layer terminal, each single-layer terminal is fixed in the corresponding terminal slot from the bottom of the insulating body upward by insertion, or a single-layer terminal in each terminal slot is embedded together with a plug fixed in the terminal slot.

9. The high-density connector with low insertion force according to claim 1, characterized in that: The double-layer terminal includes an upper layer terminal and a lower layer terminal. The upper layer terminal is inserted and fixed in the terminal slot from the top of the insulating body downwards, and the lower layer terminal is inserted and fixed in the terminal slot from the bottom of the insulating body upwards. The single-layer terminal is inserted and fixed in the terminal slot from the bottom of the insulating body upwards or from the top of the insulating body downwards.

10. The high-density connector with low insertion force according to any one of claims 1-9, characterized in that: The insulating body has at least one end provided with an ear clip receiving space and a pivot part for pivotally connecting the ear clip; at least one ear clip is pivotally connected to one end of the insulating body.

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