Wiring terminal and FPC connector comprising same

Abstract

The utility model relates to the technical field of electric connector manufacturing, in particular to a wiring terminal and an FPC (Flexible Printed Circuit) connector comprising the same. The wiring terminal only retains a signal transmission function, and is composed of an embedding segment, a vertical thrust segment, an elastic top contact conduction segment and a PCB welding segment. And the embedding section and the elastic top contact conduction section are formed by extending the rear side wall of the vertical thrust section backwards. And the PCB welding section is formed by forwards extending the front side wall of the vertical thrust section. Therefore, on one hand, a charge distribution surface is greatly reduced, and the stability and reliability of signal transmission are ensured; in addition, at least one of the wiring terminals is grounded, so that the problems of electromagnetic waves, crosstalk interference and the like which are generated in the signal transmission process are weakened to a certain extent; and on the other hand, when the flexible flat cable is inserted in place relative to the FPC connector, the plurality of wiring terminals are electrically conducted with the flexible flat cable in an elastic pressing contact manner, so that the flexible flat cable is prevented from being quickly worn in long-term application.

Description

Technical Field

[0001] The utility model relates to the technical field of electric connector manufacturing, in particular to a wiring terminal and an FPC connector comprising the same. Background Art

[0002] Flexible flat cables (FFCs) are components used for signal transmission. Their inherent advantages include flexible design and high signal transmission speed, making them widely used in many electronic products. These cables utilize FPC connectors and electronic connectors to transmit signals from one end to the other, achieving signal transmission. They are commonly used in various digital communications products, portable electronics, computer peripherals, measuring instruments, automotive electronics, and other fields.

[0003] Chinese utility model patent CN212810617U discloses a flip-up FPC connector. The flip-up FPC connector is mainly composed of several parts such as an insulating rubber seat, a flip piece and a terminal. Figure 1As shown in the figure, the terminal block primarily consists of an upper cantilever arm, a rear contact arm, and a lower cantilever arm, which are connected in sequence. The flip member is hingedly connected to the insulating rubber base and can freely rotate circumferentially when subjected to external force. The flip member is located directly in front of the rear contact arm and lies horizontally between the upper and lower cantilever arms. Multiple non-circular retaining arms are formed along the width of the flip member, arranged in a linear array. Near its free end, the upper cantilever arm is formed with a semi-open receiving groove. These multiple semi-open receiving grooves cooperate to position the flip member. As the flip member is moved circumferentially, each non-circular retaining arm rotates circumferentially within its corresponding semi-open receiving groove, thereby securing and releasing the flexible flat cable. The free end of the lower cantilever arm is formed with a lower inward-extending protrusion. When the flexible flat cable is installed, its bottom wall is elastically pressed against by the multiple lower inward-extending protrusions arranged in a linear array, facilitating signal transmission. As can be seen from the above description, multiple terminal blocks not only have the function of transmitting signals, but also work together to have the functions of elastic pressure application and limiting the flipping part, so as to facilitate the flipping part to perform the opening and closing operation relative to the insulating rubber seat. Although this type of terminal block has the design advantage of integrating the signal transmission function and the limiting flipping part function into one, it is also accompanied by the following obvious defects, which are specifically manifested as follows: 1) The terminal block has both a lower cantilever for realizing signal transmission and an upper cantilever for realizing the limit of the flipping part, and the two are connected and electrically conductive with the help of a rear connecting arm. During the electrical conduction process, the charge distribution surface is large, which is bound to affect the stability and reliability of signal transmission. In the existing technology, the terminal block is not grounded, resulting in serious problems of electromagnetic waves and crosstalk interference; 2) After a period of use, the conductive layer of the flexible cable is severely worn, which is bound to affect the stability and reliability of signal transmission. The reason for this is that after the flexible cable is pressed and connected by multiple terminals, due to design flaws in the terminals, the elastic recovery ability of the terminals and the insulating rubber base is insufficient or completely absent. As a result, the flexible cable tends to be subjected to rigid pressure for a long time, which will inevitably wear out the conductive layer of the flexible cable. Therefore, technical personnel urgently need to solve this problem. Utility Model Content

[0004] Therefore, in view of the above existing problems and defects, the designers of the present invention collected relevant information, conducted multiple evaluations and considerations, and after continuous experiments and modifications by technicians with many years of R&D experience in this industry, the terminal block was finally created.

[0005] In order to solve the above technical problems, the utility model relates to a terminal block, which adopts an embedded method to achieve assembly with an insulating rubber seat, and when the flexible flat cable is inserted into place relative to the FPC connector, at least one of the multiple terminal blocks arranged in a linear array is electrically connected to the ground wire in the flexible flat cable for grounding, and the remaining part is electrically connected to the signal wire in the flexible flat cable for signal transmission. The terminal block is a metal punching part, which is composed of an embedded section, a vertical thrust section, an elastic top-contact conductive section and a PCB board soldering section. The embedded section and the elastic top-contact conductive section are both formed by extending backward from the rear side wall of the vertical thrust section, and the embedded section is located directly below the elastic top-contact conductive section. The PCB board soldering section is formed by extending forward from the front side wall of the vertical thrust section. When the flexible flat cable is inserted into place relative to the FPC connector and is pressed and locked, the multiple terminal blocks adopt an elastic top-contact method to be electrically connected to the flexible flat cable.

[0006] As a further improvement to the technical solution disclosed in this utility model, the elastic contact conductive section is sequentially connected from front to back by a flat abutting section and an inclined elastic contact section. A contact protrusion is formed at the free end of the inclined elastic contact section. The horizontal inclination angle of the inclined elastic contact section is α, so 4°≤α≤7°.

[0007] As a further improvement of the technical solution disclosed in the utility model, a hooking protrusion is formed on the free end of the inserting section. When the terminal is assembled relative to the insulating rubber seat, the hooking protrusion is blocked and limited by the insulating rubber seat, or penetrates into the insulating rubber seat to a set depth.

[0008] As a further improvement of the technical solution disclosed in the present invention, the rear side wall of the hooking protrusion is beveled to form a beveled guide surface.

[0009] As a further improvement of the technical solution disclosed in the utility model, a soldering avoidance notch is formed on the terminal. The soldering avoidance notch is formed by extending upward from the bottom wall of the vertical thrust section, and its longitudinal section is semicircular.

[0010] Furthermore, the utility model also discloses an FPC connector, which includes a mechanical terminal, a flip pressure piece, the above-mentioned wiring terminal, and an insulating rubber seat. The insulating rubber seat is an injection molded part, and is simultaneously formed with a flexible cable insertion groove, a wiring terminal embedding groove, and a mechanical terminal embedding groove. A plurality of mechanical terminals cooperate to elastically apply pressure and limit the flip pressure piece. At a certain moment in the process of the flip pressure piece performing a circumferential flipping motion due to the action of an external force, it is able to achieve a pressing and locking of the flexible cable. Along with this, a plurality of wiring terminals adopt an elastic top contact method to achieve electrical conduction with the flexible cable. The wiring terminal embedding groove is composed of an upper wiring terminal embedding sub-groove and a lower wiring terminal embedding sub-groove that are independent of each other. The upper wiring terminal embedding sub-groove is used to insert the elastic top contact conductive section, and it is extended downward from the top wall of the flexible cable insertion groove. The lower wiring terminal embedding sub-groove is used to insert the embedding section, and it is extended upward from the bottom wall of the insulating rubber seat. When the connection terminal is assembled relative to the insulating rubber seat, the flat abutting segment presses against the bottom wall of the upper connection terminal embedding sub-slot, while the tilted elastic top contact segment remains in a free state.

[0011] As a further improvement of the technical solution disclosed in the present utility model, the groove width value of the upper wiring terminal embedded sub-groove is w1, the groove width value of the lower wiring terminal embedded sub-groove is w2, the thickness value of the elastic top contact conductive section is w3, the thickness value of the embedded section is w4, the spacing value between the elastic top contact conductive section and the embedded section is d1, and the spacing value between the upper wiring terminal embedded sub-groove and the lower wiring terminal embedded sub-groove is d2, then 0.012mm≤w1-w3≤0.03mm, w2<w4, d1<d2.

[0012] Specifically, the terminal block disclosed in this invention lacks a position-limiting, flip-over pressure-applying element, retaining only a resilient, pressure-sensitive flexible cable for signal transmission. This is punched from metal strip. This effectively simplifies the terminal block's design and reduces its size, significantly reducing the charge distribution surface during electrical conduction and ensuring stable and reliable signal transmission. In addition, at least one of the multiple terminals is grounded, which to a certain extent weakens the problems of electromagnetic waves and crosstalk interference that arise in the signal transmission process; on the other hand, when the flexible cable is inserted into place relative to the FPC connector, the multiple terminals adopt an elastic pressure-contact method to achieve electrical conduction with the flexible cable, and in the process of achieving pressure contact and positioning of the flexible cable, the elastic top-contact conductive section undergoes adaptive elastic deformation due to the action of the reverse force, thereby paving the way for the conductive layer of the flexible cable to avoid severe and excessive wear in long-term use; on the other hand, thanks to the minimalist design structure and small size of the terminal, it paves the way for simplifying the manufacturing process and subsequent embedding process.

[0013] With respect to the FPC connector disclosed in the present invention, the terminal block abandons the limit flip pressure member, retaining only the signal transmission function, and is completely isolated from the mechanical terminal in terms of physical space, thereby further ensuring the stability and reliability of signal transmission, and to a certain extent weakening electromagnetic waves and crosstalk interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a three-dimensional schematic diagram of an FPC connector terminal in the prior art.

[0016] Figure 2 This is a schematic diagram of the application of the FPC connector disclosed in the utility model.

[0017] Figure 3 It is a three-dimensional schematic diagram of the FPC connector disclosed in the utility model.

[0018] Figure 4 yes Figure 3 Front view of .

[0019] Figure 5 yes Figure 4 AA cross-sectional view.

[0020] Figure 6 It is a three-dimensional schematic diagram of the connection terminals in the FPC connector disclosed in the utility model.

[0021] Figure 7 It is a three-dimensional schematic diagram of the insulating rubber seat in the FPC connector disclosed in the utility model.

[0022] Figure 8 yes Figure 7 Front view of .

[0023] Figure 9 yes Figure 8 BB cross-sectional view.

[0024] Figure 10 yes Figure 5 A magnified view of the I part.

[0025] Figure 11 yes Figure 3 Top view of the PCB (with hidden lines visible).

[0026] Figure 12yes Figure 11 CC cross-sectional view.

[0027] Figure 13 yes Figure 12 Partially enlarged view of II.

[0028] 1-Mechanical terminal; 2-Flip pressure piece; 3-Connection terminal; 31-Insertion section; 311-Hooking protrusion; 3111-Beveled guide surface; 32-Vertical thrust section; 321-Soldering avoidance notch; 33-Elastic top contact conduction section; 331-Flat resting section; 332-Inclined elastic top contact section; 3321-Top contact protrusion; 34-PCB board soldering section; 4-Insulating rubber seat; 41-Flexible cable insertion slot; 42-Connection terminal insertion slot; 421-Upper connection terminal insertion sub-slot; 422-Lower connection terminal insertion sub-slot; 43-Mechanical terminal insertion slot. DETAILED DESCRIPTION

[0029] In the description of the present invention, it should be understood that the terms "left", "right", "front", "back", "up", "down", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0030] The following is a further detailed description of the present invention in conjunction with specific embodiments. Figure 2 The application diagram of the FPC connector disclosed in the present invention is shown. It can be seen that the FPC connector and the flexible cable work together to achieve the purpose of signal transmission, serving many markets and applications, including consumer electronics, industrial control, displays, printers, automobiles, test and measurement instruments, home appliances and medical equipment.

[0031] Figure 3 、 Figure 4 、 Figure 5The three-dimensional schematic diagram, front view and AA cross-sectional view of the FPC connector disclosed in the present invention are respectively shown. It can be seen that it is mainly composed of several parts including a mechanical terminal 1, a flip pressure piece 2, a wiring terminal 3 and an insulating rubber seat 4. Among them, the insulating rubber seat 4 is an injection molded part, which is used to insert the flexible cable and serves as the embedding basis for the mechanical terminal 1 and the wiring terminal 3. When the FPC connector is assembled, the mechanical terminal 1 and the wiring terminal 3 are independent of each other and completely isolated. Multiple mechanical terminals 1 are arranged in a linear array and are embedded in order to achieve assembly with the insulating rubber seat 4, cooperating to elastically press and limit the flip pressure piece 2. When the flexible cable is inserted into place relative to the insulating rubber seat 4, the flip pressure piece 2 is flipped into place and locked, the flexible cable is positioned due to the pressure from the flip pressure piece 2, and the multiple wiring terminals 3 arranged in a linear array are elastically pressed on the flexible cable to achieve electrical conduction.

[0032] Figure 6 The figure shows a three-dimensional schematic diagram of the terminal block in the FPC connector disclosed in the present invention. It can be seen that it is completely different from the traditional design structure. Specifically, the terminal block 3 is composed of an inserting section 31, a vertical thrust section 32, an elastic top-contact conductive section 33, and a PCB board soldering section 34. The inserting section 31 and the elastic top-contact conductive section 33 are both formed by extending backward from the rear side wall of the vertical thrust section 32, and the inserting section 31 is located directly below the elastic top-contact conductive section 33. The PCB board soldering section 34 is formed by extending forward from the front side wall of the vertical thrust section 32. When the flexible flat cable is inserted into place relative to the FPC connector and is pressed and locked, the multiple terminal blocks 3 all adopt an elastic top-contact method to electrically conduct with the flexible flat cable, and at least one of the terminal blocks 3 is electrically connected to the ground wire in the flexible flat cable for grounding, and the remaining parts are electrically connected to the signal wire in the flexible flat cable for signal transmission.

[0033] In practical applications, the connection terminal 3 disclosed in the present utility model has achieved at least the following beneficial technical effects, specifically:

[0034] 1) Terminal block 3 retains only the top contact and flexible cable conduction functions, effectively simplifying its design and reducing its size. This means that the charge distribution surface during electrical conduction is significantly reduced, ensuring stable and reliable signal transmission.

[0035] 2) At least one of the multiple connection terminals 3 is grounded, thereby reducing to a certain extent the electromagnetic waves and crosstalk interference that may occur during signal transmission;

[0036] 3) When the flexible flat cable is inserted into place relative to the FPC connector, the multiple terminals 3 adopt an elastic pressure contact method to achieve electrical conduction with the flexible flat cable. In the process of achieving pressure contact and positioning of the flexible flat cable, the elastic top contact conductive section 33 undergoes adaptive elastic deformation due to the action of the reverse force, thereby paving the way for the conductive layer of the flexible flat cable to avoid severe and excessive wear during long-term use.

[0037] It should also be noted that, thanks to the simplified design structure and reduced size of the connection terminal 3 , the manufacturing process and subsequent embedding process of the connection terminal 3 are simplified.

[0038] Depend on Figure 6 As shown in FIG, it can be clearly seen that, from front to back, the elastic top contact conductive section 33 is sequentially connected by a flat abutting section 331 and an inclined elastic top contact section 332. A top contact protrusion 3321 is formed at the free end of the inclined elastic top contact section 332. Figure 10 As shown in , assuming the horizontal inclination angle of the tilted elastic contact segment 332 is α, then 4°≤α≤7°. After the terminal block 3 is fully engaged with the insulating rubber base 4, the flat abutting segment 331 remains in close contact with the insulating rubber base 4, while the tilted elastic contact segment 332 is separated from the insulating rubber base 4 and remains free. As the flexible flat cable continues to be locked due to the pressing force from the flip pressure member 2, the multiple linear array contact protrusions 3321 achieve elastic pressure contact with the flexible flat cable, and at the same time, the horizontal inclination angle α changes adaptively.

[0039] According to common knowledge, the elastic deformation capacity of the tilted elastic top contact segment 332 is primarily determined by its extended length and its horizontal tilt angle α. Therefore, when designing an FPC connector, the extended length and horizontal tilt angle α of the tilted elastic top contact segment 332 must be determined based on the type of pre-installed flexible cable and the characteristics of its conductive layer.

[0040] Likewise Figure 6 As shown in FIG, a hooking protrusion 311 is formed at the free end of the inserting section 31. When the connection terminal 3 is assembled relative to the insulating rubber seat 4, the hooking protrusion 311 penetrates into the insulating rubber seat 4 to a set depth.

[0041] Furthermore, in order to ensure that the terminal block 3 is smoothly embedded with the insulating rubber seat 4, and thus to pave the way for improving the assembly efficiency of the FPC connector, as a further optimization of the above technical solution, as shown in FIG. Figure 6 As shown in FIG, the rear side wall of the hooking protrusion 311 undergoes a chamfering process to form a chamfered guide surface 3111.

[0042] Depend on Figure 6As can be clearly seen in the figure, a soldering clearance notch 321 is formed on the terminal 3. This notch 321 extends upward from the bottom wall of the vertical thrust section 32 and has a semicircular longitudinal cross-section. This design allows the perimeter of the PCB soldering section 34 to be completely immersed and filled with molten tin, thereby ensuring good electrical conductivity between the terminal 3 and the PCB. This helps ensure stable and reliable signal transmission, or ensures that one or more grounding terminals 3 have good grounding properties. This not only protects the FPC connector from electromagnetic and radio frequency interference in specific applications, but also effectively prevents the accumulation of static electricity.

[0043] Figure 7-9 The following diagrams show the structure of the insulating rubber seat in the FPC connector disclosed in the present invention. It can be seen that the insulating rubber seat 4 is formed with a flexible cable insertion groove 41, a terminal insertion groove 42, and a mechanical terminal insertion groove 43. Among them, the flexible cable insertion groove 41 is used to insert the flexible cable, the terminal insertion groove 42 is used to insert the terminal 3, and the mechanical terminal insertion groove 43 is used to insert the mechanical terminal 1. Figure 3 、 4 As shown in Figures 5 and 6, after the FPC connector is assembled, the multiple mechanical terminals 1 cooperate to elastically apply pressure and limit the flipping pressure member 2. At a certain moment during the circumferential flipping motion of the flipping pressure member 2 due to the external force, it is able to press and lock the flexible flat cable. At the same time, the top contact protrusions 3321 formed on the multiple terminal blocks 3 all adopt an elastic top contact method to achieve electrical conduction with the flexible flat cable.

[0044] Depend on Figure 3 、 4 As shown in , 5 , it can be clearly seen that there is no connection between the connection terminal 3 and the mechanical terminal 1 , and they are completely isolated in the physical space concept, thereby further ensuring the stability and reliability of signal transmission, and to a certain extent weakening electromagnetic waves and crosstalk interference.

[0045] Furthermore, if Figure 7-9As shown in FIG, the terminal insertion slot 42 is composed of an upper terminal insertion sub-slot 421 and a lower terminal insertion sub-slot 422, which are independent of each other. The upper terminal insertion sub-slot 421 is used to accommodate the elastic contact conductive segment 33 and is formed by extending downward from the top wall of the flexible flat cable insertion slot 41. The lower terminal insertion sub-slot 422 is used to insert the insertion segment 31 and is formed by extending upward from the bottom wall of the insulating rubber base 4. When the terminal 3 is assembled with the insulating rubber base 4, the flat contact segment 331 presses against the bottom wall of the upper terminal insertion sub-slot 421, while the tilted elastic contact segment 332 remains free. Furthermore, during the installation of the terminal block 3, the hooking projection 311 elastically contacts the top wall of the lower terminal block insertion slot 422 and slides until the hooking projection 311 is blocked and restrained by the stepped surface formed in the lower terminal block insertion slot 422. This ensures a stable and reliable connection between the terminal block 3 and the insulating rubber holder 4 after assembly, preventing the terminal block 3 from loosening due to excessive reaction force or falling out of the insulating rubber holder 4 when the flexible cable is improperly inserted or removed.

[0046] In order to take into account the high bonding force between the terminal block 3 and the insulating rubber seat 4 after the embedding is completed, reduce the difficulty of the embedding operation, shorten the total assembly time of the FPC connector, etc., as a further optimization of the technical solution disclosed in the utility model, such as Figure 11 、 12 As shown in Figures 1 and 13, the width of the upper terminal embedding sub-groove 421 is w1, the width of the lower terminal embedding sub-groove 422 is w2, the thickness of the elastic top-contact conductive section 33 is w3, the thickness of the inserting section 31 is w4, the spacing between the elastic top-contact conductive section 33 and the inserting section 31 is d1, and the spacing between the upper terminal embedding sub-groove 421 and the lower terminal embedding sub-groove 422 is d2, then 0.012mm≤w1-w3≤0.03mm, w2<w4, d1<d2.

[0047] Finally, it should be noted that in order to reduce the difficulty of molding and manufacturing costs, the mechanical terminals 1 and the wiring terminals 3 are preferably made of batch punching of metal strips, and the matching insulating rubber seat 4 is preferably formed in one piece by injection molding.

[0048] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A terminal block that is assembled with an insulating rubber base by means of an embedded assembly, wherein when a flexible flat cable is inserted into place relative to an FPC connector, at least one of the plurality of terminal blocks arranged in a linear array is electrically connected to a ground line in the flexible flat cable for grounding, and the remaining terminals are electrically connected to a signal line in the flexible flat cable for signal transmission, characterized in that: The terminal block is a metal stamping part, which consists of an inserting section, a vertical thrust section, an elastic top-contact conductive section and a PCB board soldering section; the inserting section and the elastic top-contact conductive section are both extended backward from the rear side wall of the vertical thrust section, and the inserting section is located directly below the elastic top-contact conductive section; and the PCB board soldering section is extended forward from the front side wall of the vertical thrust section; when the flexible cable is inserted into place relative to the FPC connector and is pressed and locked, multiple terminal blocks adopt an elastic top-contact method to achieve electrical conduction with the flexible cable.

2. The terminal block according to claim 1, wherein: Along the front to back direction, the elastic top contact conductive section is sequentially connected by a flat abutting segment and an inclined elastic top contact segment; and a top contact protrusion is formed at the free end of the inclined elastic top contact segment; the horizontal inclination angle of the inclined elastic top contact segment is α, then 4°≤α≤7°.

3. The terminal block according to claim 2, wherein: A hooking protrusion is formed at the free end of the inserting section; when the wiring terminal is assembled relative to the insulating rubber seat, the hooking protrusion is blocked and limited by the insulating rubber seat, or penetrates into the insulating rubber seat to a set depth.

4. The connection terminal according to claim 3, characterized in that: The rear side wall of the hooking protrusion undergoes a chamfering process to form a chamfered guide surface.

5. The connection terminal according to claim 2, characterized in that: A soldering avoidance notch is also formed on the connecting terminal; the soldering avoidance notch is formed by extending upward from the bottom wall of the vertical thrust section, and its longitudinal section is semicircular.

6. An FPC connector, comprising a mechanical terminal, a flip pressure member, and the terminal according to any one of claims 2 to 5, and the insulating rubber seat; the insulating rubber seat is an injection molded part, and is simultaneously formed with a flexible cable insertion slot, a terminal insertion slot, and a mechanical terminal insertion slot; a plurality of the mechanical terminals cooperate to elastically apply pressure and limit the flip pressure member; at a certain moment in the process of the flip pressure member performing a circumferential flipping motion due to the action of an external force, it is able to achieve a pressing and locking effect on the flexible cable, and at the same time, a plurality of the terminal terminals adopt an elastic top contact method to engage with the flexible cable Electrical conduction; the terminal embedding groove is composed of an upper terminal embedding sub-groove and a lower terminal embedding sub-groove that are independent of each other; the upper terminal embedding sub-groove is used to place the elastic top-contact conductive section, and it is extended downward from the top wall of the soft cable insertion groove; the lower terminal embedding sub-groove is used to insert the inserting section, and it is extended upward from the bottom wall of the insulating rubber seat; and when the terminal is assembled relative to the insulating rubber seat, the flat abutting segment is pressed against the bottom wall of the upper terminal embedding sub-groove, and the inclined elastic top-contact segment remains free.

7. The FPC connector according to claim 6, wherein: The slot width value of the upper terminal embedding sub-groove is w1, the slot width value of the lower terminal embedding sub-groove is w2, the thickness value of the elastic top contact conductive section is w3, the thickness value of the inserted section is w4, the spacing value between the elastic top contact conductive section and the inserted section is d1, and the spacing value between the upper terminal embedding sub-groove and the lower terminal embedding sub-groove is d2, then 0.012mm≤w1-w3≤0.03mm, w2<w4, d1<d2.

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