CN113809597B - A snap-fit structure and a connector using the same - Google Patents

Abstract

A buckling structure and a connector using the same, the buckling structure comprises a first buckling piece and a second buckling piece which are longitudinally arranged side by side, a buckle which is bent towards the second buckling piece is longitudinally extended on the first buckling piece, the buckle comprises two first cantilevers which are connected to the first buckling piece and longitudinally extend, a space is reserved between the two first cantilevers, a buckling hole is formed in each buckling piece aligned with each buckle, and when the buckle is buckled with the buckling hole, the two lateral sides of the first cantilevers are in interference fit with the buckling hole. The connector comprises a plurality of terminal modules which are longitudinally arranged side by side, each terminal module comprises a terminal plate and an outer shielding plate, the terminal plates and the outer shielding plates are fastened and fixedly connected through fastening structures, the risk of scraping a coating caused by assembly interference is effectively reduced, and therefore the pressure-resistant bad phenomenon of products is improved.

Description

A snap-fit structure and a connector using the same

Technical Field

The invention relates to the technical field of connection structures, in particular to a buckle structure and a connector using the same.

Background technique

In the existing terminal module, the matching structure of the shielding sheet and the terminal is a peanut buckle structure, as shown in Figures 1, 2, and 3. At present, the contact between the terminal sheet and the shielding sheet mostly relies on the peanut buckle structure, that is, the peanut hole 3 and the bending sheet 2 have an interference fit. This fit is a "strong-to-strong" fit. The bending sheet 2 and the peanut hole 2 have interference fit on both sides of the front, and there is no deformation space. The following problems are prone to occur during the assembly process:

1: It is easy to scratch the surface coating of the matching shielding sheet, resulting in metal debris and poor pressure resistance of the product;

2: During the forced installation process, the "bumps" on the peanut holes are easily broken, causing poor contact and affecting SI performance.

Summary of the invention

In order to solve the above technical problems, the present invention provides a snap-fit structure and a connector using the structure, which effectively reduces the risk of scratching the coating due to assembly interference, thereby improving the poor voltage resistance of the product.

In order to achieve the above technical purpose, the technical solution adopted is: a buckle structure, including a first buckle piece and a second buckle piece arranged side by side in the longitudinal direction, a buckle extending longitudinally from the first buckle piece and bent in the direction of the second buckle piece, the buckle including two first cantilevers connected to the first buckle piece and extending longitudinally, a gap is provided between the two first cantilevers, a buckle hole is provided on the second buckle piece aligned with each buckle, and when the buckle is plugged into the buckle hole, the lateral sides of the first cantilever are interference fit with the buckle hole.

Furthermore, the front and rear sides of the first cantilever are gap-matched with the buckle hole.

Furthermore, the bottoms of the two first cantilevers are connected by a connecting piece, and the two first cantilevers and the connecting piece surround a process hole.

Furthermore, the outer sides of the bottoms of the two first cantilevers are chamfered, and the chamfers have a guiding plug-in state so that the bottoms of the first cantilevers do not contact the buckle holes during the assembly process.

Furthermore, when the connecting piece completely enters the buckle hole, a portion of the chamfer that guides the plug-in state is located outside the buckle hole.

Furthermore, a first rounded corner is provided on the lateral outer side of the first cantilever, and a second rounded corner matching the first rounded corner is provided on the inner side of the buckle hole. The surface of the first cantilever in contact with the buckle hole during assembly is in a smooth state.

Furthermore, a notch is provided on the connecting piece.

Furthermore, the width of the notch is 1.2-1.5 times the thickness of the material at the bottom of the first cantilever.

Furthermore, at least one stress hole is provided on each of the two lateral sides of the buckle hole.

Furthermore, the distance between two stress holes adjacent to the buckle hole is 1-1.5 times the thickness of the second buckle sheet.

Furthermore, a first groove is respectively provided on two lateral sides of the buckle.

Furthermore, a second groove extending from the interval to the buckle root is provided between the two first cantilever roots.

Further, the width of the second groove is smaller than the width of the space.

Furthermore, the length of the interference between the lateral outer side of the first cantilever and the buckle hole has a margin of more than 0.05 mm.

Furthermore, the material thickness of the bottom of the first cantilever is 0.8-1 times the material thickness of the root of the first cantilever.

Furthermore, the root width of the first cantilever is not less than 2 times the root material thickness of the first cantilever.

Furthermore, the bottom width of the first cantilever is 1.2-2 times the bottom material thickness of the first cantilever.

Furthermore, the height of the connecting piece is 1-1.5 times the thickness of the bottom material of the first cantilever.

A connector includes a plurality of terminal modules arranged side by side in a longitudinal direction, wherein a single terminal module includes a terminal sheet and an outer shielding sheet, wherein the terminal sheet and the outer shielding sheet are fastened and fixedly connected by adopting the snap-fit structure, wherein the terminal sheet serves as a first snap-fit sheet and the outer shielding sheet serves as a second snap-fit sheet, or the terminal sheet serves as a second snap-fit sheet and the outer shielding sheet serves as a first snap-fit sheet.

Furthermore, the terminal module also includes an inner shielding sheet arranged between the terminal sheet and the outer shielding sheet, and the inner shielding sheet is provided with a through hole for the buckle to pass through and the clearance fit.

A connector includes multiple terminal modules, the terminal modules include a terminal piece and two outer shielding pieces, the two outer shielding pieces are arranged side by side on both sides of the terminal piece in the longitudinal direction, the terminal piece and the two outer shielding pieces are buckled and fixedly connected using the buckling structure, one of the outer shielding pieces serves as a first buckling piece, and the terminal piece and the other outer shielding piece both serve as second buckling pieces.

The beneficial effects of the present invention are:

1. The buckle structure satisfies that during the assembly process, the buckle and the buckle hole are interfering on both sides in the lateral direction, and there is a gap between the two first cantilevers to form a deformation space, so that when the buckle and the buckle hole are assembled, the buckle meets the buckle requirements and the buckle will not be scratched on the surface, which is suitable for the buckle connection of various products.

2. A chamfer is provided on the outside of the bottom of the first cantilever so that the lower part of the first cantilever does not contact the buckle hole first, which guides the buckle into the buckle hole and reduces scratches during assembly. When the connecting piece completely enters the buckle hole, the chamfer also has a function of guiding a portion of the plug-in state to be located outside the buckle hole, that is, the height of the chamfer is greater than the height of the connecting piece, which can further enhance the guiding effect and prevent the first cantilevers on both sides of the connecting piece from contacting the buckle hole first and affecting deformation.

3. Stress holes are added on both sides of the buckle hole to further release stress during assembly and provide deformation space for the buckle hole to avoid the buckle and the buckle hole being worn during assembly to produce metal debris, resulting in poor pressure resistance of the product.

4. A first rounded corner is provided on the lateral outer surface of the first cantilever, and a second rounded corner matching the first rounded corner is provided on the inner side of the buckle hole. The surface of the first cantilever that comes into contact with the buckle hole during the assembly process is in a smooth state. This structure can play a guiding role in the assembly process, and can avoid the buckle scratching and generating metal debris during the assembly process, resulting in poor pressure resistance of the product.

5. Add notches on the connecting piece to further increase the size of the deformation space, providing the buckle with a larger deformation amount when the buckle is assembled with the buckle hole.

6. The width of the notch is 1.2-1.5 times the thickness of the bottom material of the first cantilever. While ensuring the existence of the notch, it cannot affect the interference fit of the buckle, so as to prevent the notch from being too wide to affect the buckling effect.

7. The distance between the two stress holes adjacent to the buckle hole is 1-1.5 times the thickness of the second buckle sheet. At this time, stress release can be completed through only two stress holes, reducing the process.

8. Adding the first groove on both sides of the buckle can reduce the stress concentration at the buckle forming position and avoid bending cracks during the buckle forming process.

9. A second groove connected to the gap is provided at the root of the buckle between the two first cantilevers, so that the root of the buckle is also deformed, making the assembly contact between the buckle and the buckle hole more reliable and preventing rebound.

10. The width of the second groove is smaller than the width of the interval to prevent the strength of the root of the buckle from being affected when it is too wide; the length of the interference between the lateral outer side of the bottom of the first cantilever and the buckle hole has a margin of more than 0.05mm to ensure reliable contact during the actual assembly process; the material thickness of the bottom of the first cantilever is 0.8-1 times the material thickness of the root of the first cantilever, which strengthens the strength of the root of the buckle and does not affect the strength of the bent cantilever during interference fit; considering the deformation and strength of the buckle, in order to achieve the best buckling effect and facilitate interference assembly of the buckle structure, the root width of the first cantilever is not less than 2 times the root material thickness of the first cantilever, the bottom width of the first cantilever is 1.2-2 times the bottom material thickness of the first cantilever, and the height of the connecting piece is 1-1.5 times the bottom material thickness of the first cantilever.

11. The connector adopts this buckle structure to effectively reduce the risk of scratching the plating caused by assembly interference, thereby improving the poor pressure resistance of the product. The connector is simple in composition, efficient, with multiple options and good performance. Different connector structures are formed by setting the buckle and buckle hole of the buckle structure in different positions, which can meet more different usage options and have broad application prospects.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a part of the structure in which a shielding sheet and a terminal sheet in a terminal module are buckled together in the prior art;

FIG2 is a schematic diagram of the structure of the bending sheet on the shielding sheet in the prior art;

FIG3 is a schematic diagram of the structure of a peanut hole on a terminal piece in the prior art;

FIG4 is a schematic diagram of the structure of a connector;

FIG5 is a schematic diagram of the appearance of the connector;

FIG6 is a schematic structural diagram of a terminal module of the present invention;

FIG7 is a schematic diagram of the structure of an outer shielding sheet of the present invention;

FIG8 is a schematic diagram of the structure of a terminal piece of the present invention;

FIG9 is a schematic diagram of the assembly of the buckle structure of the present invention;

FIG10 is a diagram showing the buckling structure of the present invention assembled in place;

FIG11 is a schematic diagram of a buckle structure of the present invention;

FIG12 is a schematic diagram of the buckle hole structure of the present invention;

FIG13 is a schematic diagram of the assembly of the buckling structure with notches of the present invention;

FIG14 is a diagram showing the buckling structure with notches of the present invention being assembled;

FIG15 is a schematic diagram of a buckle structure with a notch according to the present invention;

In the figure: 1, terminal module, 2, bending sheet, 3, peanut hole, 4, buckle plate, 5, insulator, 6, fixing sheet, 10, terminal sheet, 20, outer shielding sheet, 30, buckle structure, 40, inner shielding sheet, 50, injection molded insert, 301, first buckle sheet, 302, second buckle sheet, 401, through hole, 3011, buckle, 3012, first groove, 3021, buckle hole, 3022, stress hole, 30111, first cantilever, 30112, connecting sheet, 30113, process hole, 30114, second groove, 30211, second fillet, 30111-1, chamfer, 30112-1, notch, 30111-2, first fillet.

Detailed ways

The preferred embodiments of the invention are given below in conjunction with the accompanying drawings to explain the technical solution of the present invention in detail. Here, the corresponding drawings are given to explain the present invention in detail. It should be particularly noted that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not used to limit or restrict the present invention.

In the description of the present embodiment, the terms "inside", "outside", "front", "back", "left", "right", etc., indicating directions or positional relationships are all based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are only used to distinguish similar objects, and cannot be understood as a specific order or sequence, and it should be understood that such usage can be interchangeable under appropriate circumstances. According to the direction of the figure, when describing the technical terms, the left and right direction in the figure is represented as "width", the up and down direction is represented as "height", the front and back direction is represented as "thickness", the top of the first cantilever is the "root", and the bottom is the "bottom".

As shown in FIGS. 9 and 10 , a buckling structure includes a first buckling piece 301 and a second buckling piece 302 arranged side by side in the longitudinal direction, the first buckling piece 301 and the second buckling piece 302 are arranged parallel to each other, a buckle 3011 is longitudinally extended from the first buckling piece 301 and bent toward the second buckling piece 302, the buckle 3011 includes two first cantilevers 30111 connected to the first buckling piece 301 and extending in the longitudinal direction, there is a gap between the two first cantilevers 30111, the shape of the gap is not fixed, the bottoms of the two first cantilevers 30111 can be closed or not, and both meet the deformation requirements of the buckle during the interference process, Figures 9 and 10 show the buckling structure in a closed state. When it is not closed, there is no connecting piece at the bottom, that is, the bottom is not connected. The two first cantilevers 30111 are symmetrical along the longitudinal center line. A buckle hole 3021 is provided on the second buckling piece 302 aligned with each buckle 3011. When the buckle 3011 is buckled with the buckle hole 3021, the lateral outer side of the bottom of the first cantilever 30111 has an interference fit with the buckle hole 3021, and the front and rear sides of the bottom of the first cantilever 30111 have a clearance fit with the buckle hole 3021. When the front and rear sides have a clearance fit, the contact between the buckle 3011 and the buckle hole 3021 is reduced, thereby reducing the contact and preventing the buckle surface from being scratched.

As shown in FIG. 11 , the bottom of the first cantilever 30111 is connected by a transversely arranged connecting piece 30112. The two first cantilevers 30111 and the connecting piece 30112 surround a process hole 30113. The shape of the process hole 30113 is not fixed. The bottom of the first cantilever 30111 comes into contact with the buckle hole 3021 during the assembly process. The bottom of the first cantilever 30111 is provided with a chamfer 30111-1 on the outside. The chamfer 30111-1 has a guiding plug-in state so that the bottom of the first cantilever 30111 does not come into contact with the buckle hole 3021 during the assembly process. The existence of the chamfer 30111-1 can guide the buckle 3011 during the assembly process. The small end enters the buckle hole 3021 first to prevent scratches and avoid damage to the buckle. When the connecting piece 30112 completely enters the snap hole 3021, the chamfer 30111-1 still has a portion that guides the plug-in state located outside the snap hole 3021, that is, the height of the chamfer 30111-1 is greater than the height of the connecting piece 30112, in order to better guide during the plug-in process and prevent the first cantilevers on both sides of the connecting piece from contacting the snap hole first and affecting deformation.

As shown in Fig. 11 and Fig. 15, the first cantilever 30111 is provided with a first rounded corner 30111-2 on the lateral outer surface, and the buckle hole 3021 is provided with a second rounded corner 30211 matching the first rounded corner 30111-2 on the inner side, and the bottom of the first cantilever 30111 is in a smooth state when in contact with the buckle hole 3021 during assembly. The rounded corner structure is provided around to effectively reduce the risk of scratching the coating caused by assembly interference, thereby improving the poor pressure resistance of the product.

As shown in Figures 13, 14 and 15, a notch 30112-1 that can be disconnected or not is added in the middle of the connecting piece 30112. The shape of the notch 30112-1 is not fixed. While ensuring the overall strength of the buckle, the deformation space is increased to achieve the optimal effect of increasing the deformation space. The width of the notch 30112-1 is 1.2-1.5 times the thickness of the bottom material of the first cantilever 30111.

As shown in Figures 9, 10, 13 and 14, at least one stress hole 3022 is provided on each lateral side of the buckle hole 3021. During the forced installation process, the stress hole 3022 can release stress and provide a deformable space to avoid wear and tear when the buckle and the buckle hole are in interference fit to produce metal debris, resulting in poor pressure resistance of the product (connector).

When only two stress holes are provided, the distance between the two stress holes 3022 is 1-1.5 times of the thickness of the second buckle piece 302 , and the two stress holes 3022 are symmetrically arranged on both lateral sides of the buckle hole 3021 .

As shown in Figures 11 and 15, a first groove 3012 is provided on each of the two lateral sides of the buckle 3011, and the first groove 3012 can be opened close to the first cantilever 30111. If the buckle 3011 without the first groove 3012 is only pressed down and bent, the first snap-fitting piece 301 is a plane, and the plane around the root of the buckle 3011 is a whole. The stress on the plane is more concentrated. During mold processing, cracks and burrs will appear at the stress concentrated position. If the first groove 3012 is opened first, the part of the plane that is bent downward between the two first grooves 3012 is separated from the other planes separately without too much pulling, thereby reducing stress concentration. The stress at the bending point is reduced during bending, which effectively avoids bending cracks when the buckle 3011 is bent.

As shown in FIG. 11 and FIG. 15 , the root of the buckle 3011 between the two first cantilevers 30111 is provided with a second groove 30114 connected to the process hole 30113 or the interval. During the assembly process, the second groove 30114 can be deformed to facilitate stress release and the interference device of the buckle structure, further improving the deformation effect of the buckle. When only the process hole 30113 exists, the buckle 3011 cooperates with the buckle hole 3021, which may cause rebound due to deformation of the head but no deformation of the root. The second groove 30114 is added to make the root of the buckle deformed, so that the contact between the buckle and the buckle hole is more reliable and will not cause rebound. The width of the second groove 30114 should be smaller than the process hole 30113 or the interval width. If the second groove 30114 is too wide, it will affect the strength of the buckle root. The length of the interference between the lateral outer side of the bottom of the first cantilever 30111 and the buckle hole 3021 has a margin of more than 0.05 mm to ensure reliable contact between the buckle and the buckle hole during assembly.

The thickness of the bottom of the first cantilever 30111 is 0.8-1 times the thickness of the root of the first cantilever 30111, which strengthens the strength of the root of the buckle, does not affect the strength of the bent cantilever during interference fit, and has a better deformation effect during assembly. Taking into account the deformation and strength of the buckle, in order to achieve the best buckling effect and facilitate interference assembly of the buckle structure, the root width of the first cantilever 30111 is not less than 2 times the root thickness of the first cantilever 30111.

Taking deformation and strength into consideration, the width of the bottom of the first cantilever 30111 is 1.2-2 times the thickness of the bottom material. To ensure assembly strength, the height of the connecting piece 30112 is 1-1.5 times the thickness of the bottom material of the first cantilever 30111.

As shown in Figures 4 and 5, a connector includes multiple terminal modules 1 arranged side by side longitudinally, one end of the terminal module 1 is a crimping end, or the crimping end terminal extends through a cover plate 4 and is welded to a printed circuit board, and the other end is a plug-in end, which can be installed with an insulator 5 and then plugged into other connectors. In addition, multiple terminal modules 1 can be arranged and fixed by a fixing plate 6.

As shown in Fig. 6, Fig. 7 and Fig. 8, a single terminal module 1 includes a terminal piece 10 and an outer shielding piece 20, and the terminal piece 10 and the outer shielding piece 20 are fastened and fixedly connected by the fastening structure 30 described in any one of claims 1 to 16, the terminal piece 10 is used as the first fastening piece 301, and the outer shielding piece 20 is used as the second fastening piece 302, that is, the terminal piece 10 is provided with a buckle 3011, and the outer shielding piece 20 is provided with a buckle hole 3021, or the terminal piece 10 is used as the second buckling piece 302, and the outer shielding piece 20 is used as the first buckling piece 301, that is, the terminal piece 10 is provided with a buckle hole 3021, and the outer shielding piece 20 is provided with a buckle 3011. The terminal piece 10 can be fixed on the injection molding insert 50, and the injection molding insert 50 is injection molded by RCP plastic, which can optimize impedance and improve SI performance.

The terminal module 1 further includes an inner shielding sheet 40 disposed between the terminal sheet 10 and the outer shielding sheet 20, and the inner shielding sheet 40 is provided with a through hole 401 for the buckle 3011 to pass through and fit with clearance. When the inner shielding sheet 40 is added, the terminal sheet 10 is provided with a buckle 3011, and the outer shielding sheet 20 is provided with a buckle hole 3021, and the buckle 3011 passes through the through hole 401 and is buckled with the buckle hole 3021. In this case, the figure is omitted, or, as shown in Figures 7 and 8, the terminal sheet 10 is provided with a buckle hole 3021, and the outer shielding sheet 20 is provided with a buckle 3011, and the buckle 3011 passes through the through hole 401 and is buckled with the buckle hole 3021.

Another form of the connector is a connector comprising a plurality of terminal modules 1, the terminal module 1 comprising a terminal piece 10 and two outer shielding pieces 20, the two outer shielding pieces 20 being arranged side by side on both longitudinal sides of the terminal piece 10, the terminal piece 10 and the two outer shielding pieces 20 being fixedly connected by a snap-fit structure 30 as described in any one of claims 1-16, wherein one of the outer shielding pieces 20 serves as a first snap-fit piece 301, the terminal piece 10 and the other outer shielding piece 20 both serve as second snap-fit pieces 302, the buckle 3011 first interferes with the buckle hole 3021 on the terminal piece 10, and then interferes with the buckle hole 3021 on the other outer shielding piece 20, and at this time, the interference length on the buckle 3011 is required to ensure that both interferences can be fully in contact.

The above are only preferred embodiments of the present invention and are not intended to limit or restrict the present invention. For researchers or technicians in this field, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection declared by the present invention.

Claims (18)

1. A buckle structure, characterized in that: it comprises a first buckle piece (301) and a second buckle piece (302) arranged side by side in the longitudinal direction, a buckle (3011) extending longitudinally from the first buckle piece (301) and bent in the direction of the second buckle piece (302), a first groove (3012) is provided on each of the two lateral sides of the buckle (3011), the buckle (3011) comprises two first cantilevers (30111) connected to the first buckle piece (301) and extending in the longitudinal direction, and one of the two first cantilevers (30111) is connected to the first buckle piece (301). There is a gap between the two first cantilevers (30111), and a second groove (30114) extending from the gap to the root of the buckle (3011) is provided between the roots of the two first cantilevers (30111). A buckle hole (3021) is provided on the second buckle piece (302) aligned with each buckle (3011), and at least one stress hole (3022) is provided on both lateral sides of the buckle hole (3021). When the buckle (3011) is buckled with the buckle hole (3021), the lateral sides of the first cantilever (30111) are interference-fitted with the buckle hole (3021). 2. A buckling structure as claimed in claim 1, characterized in that: the front and rear sides of the first cantilever (30111) are clearance-matched with the buckle hole (3021). 3. A snap-fit structure as claimed in claim 1, characterized in that the bottoms of the two first cantilevers (30111) are connected by a connecting piece (30112), and the two first cantilevers (30111) and the connecting piece (30112) surround a process hole (30113). 4. A snap-fit structure as described in claim 1 or 3, characterized in that: a chamfer (30111-1) is provided on the outer side of the bottom of the two first cantilevers (30111), and the chamfer (30111-1) has a guiding plug-in state so that the bottom of the first cantilever (30111) does not contact the snap hole (3021) during the assembly process. 5. A buckling structure as claimed in claim 4, characterized in that: when the connecting piece (30112) completely enters the buckle hole (3021), the chamfer (30111-1) also has a portion of the guiding plug-in state located outside the buckle hole (3021). 6. A snap-fit structure as claimed in claim 4, characterized in that: a first rounded corner (30111-2) is provided on the lateral outer side of the first cantilever (30111), a second rounded corner (30211) matching the first rounded corner (30111-2) is provided on the inner side of the snap hole (3021), and the surface of the first cantilever (30111) that contacts the snap hole (3021) during the assembly process is in a smooth state. 7. A buckling structure according to claim 4, characterized in that a notch (30112-1) is provided on the connecting piece (30112). 8. A buckling structure as claimed in claim 7, characterized in that the width of the notch (30112-1) is 1.2-1.5 times the thickness of the bottom material of the first cantilever (30111). 9. A buckling structure as claimed in claim 1, characterized in that the distance between two stress holes (3022) adjacent to the buckle hole (3021) is 1-1.5 times the material thickness of the second buckling piece (302). 10. The buckling structure according to claim 1, characterized in that the width of the second groove (30114) is smaller than the width of the gap. 11. A buckling structure according to claim 1, characterized in that: the length of the interference between the lateral outer side of the first cantilever (30111) and the buckle hole (3021) has a margin of more than 0.05 mm. 12. A buckling structure according to claim 1, characterized in that the bottom material thickness of the first cantilever (30111) is 0.8-1 times the root material thickness of the first cantilever (30111). 13. A buckling structure according to claim 1 or 12, characterized in that the root width of the first cantilever (30111) is not less than 2 times the root material thickness of the first cantilever (30111). 14. A buckling structure according to claim 1 or 11, characterized in that the bottom width of the first cantilever (30111) is 1.2-2 times the bottom material thickness of the first cantilever (30111). 15. A buckling structure as claimed in claim 4, characterized in that the height of the connecting piece (30112) is 1-1.5 times the thickness of the bottom material of the first cantilever (30111). 16. A connector, comprising a plurality of terminal modules (1) arranged longitudinally side by side, characterized in that: a single terminal module (1) comprises a terminal piece (10) and an outer shielding piece (20), the terminal piece (10) and the outer shielding piece (20) are fastened and fixedly connected by a fastening structure (30) as described in any one of claims 1 to 15, the terminal piece (10) serves as a first fastening piece (301), and the outer shielding piece (20) serves as a second fastening piece (302), or the terminal piece (10) serves as the second fastening piece (302), and the outer shielding piece (20) serves as the first fastening piece (301). 17. A connector as claimed in claim 16, characterized in that the terminal module (1) further comprises an inner shielding sheet (40) arranged between the terminal sheet (10) and the outer shielding sheet (20), and the inner shielding sheet (40) is provided with a through hole (401) for the buckle (3011) to pass through and to fit with clearance. 18. A connector, comprising a plurality of terminal modules (1), characterized in that: the terminal module (1) comprises a terminal piece (10) and two outer shielding pieces (20), the two outer shielding pieces (20) are respectively arranged side by side on both longitudinal sides of the terminal piece (10), the terminal piece (10) and the two outer shielding pieces (20) are fastened and fixedly connected by a fastening structure (30) as described in any one of claims 1 to 15, one of the outer shielding pieces (20) serves as a first fastening piece (301), and the terminal piece (10) and the other outer shielding piece (20) both serve as second fastening pieces (302).