CN114696145A - Terminal fixing structure and terminal module - Google Patents

Abstract

The invention relates to a terminal fixing structure and a terminal module, wherein the terminal module comprises a terminal, a shielding sheet and an injection molding insert, and the terminal fixing structure is realized in a way that the insertion end of the terminal is fixed by plastic wrapping except a contact surface. According to the invention, plastic is wrapped in the area of the terminal insertion end except the contact surface, so that the terminal insertion end is stable and reliable, and the terminal contact and transmission performance is better.

Description

Terminal fixing structure and terminal module

Technical Field

The invention belongs to the technical field of connectors, and particularly relates to a terminal fixing structure.

Background

The existing terminal insertion end usually extends out of the injection molding insert, and a cantilever structure is formed at the front end of the injection molding insert, so that when the connector is inserted, the terminal insertion end can generate deflection and the like under the action of the insertion force and when the connector is used in a vibration environment, which are not beneficial to terminal contact and signal transmission.

Disclosure of Invention

In order to solve the above problems, the present invention provides a terminal fixing structure, which fixes an insertion end by plastic wrapping an area outside a contact surface of the insertion end, thereby enhancing the stability of the terminal.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. The terminal fixing structure provided by the invention comprises a terminal module 2, wherein the terminal module 2 comprises a terminal 21, a shielding sheet 22 and an injection molding insert 23, and the other areas except a contact surface 215 of the insertion end of the terminal 21 are fixed by plastic wrapping.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

In the terminal fixing structure of the insertion end contact area, the injection mold insert is provided with at least one elongated slot at the terminal insertion end, the elongated slot is located at the side surface of the terminal opposite to the adjacent terminal, and the elongated slot exposes the part of the side surface connected with the contact surface of the terminal insertion end contact area to the air, so as to prevent redundant plastic generated during injection molding from overflowing to the contact surface and affecting the contact effect.

In the terminal fixing structure, the front end of the long groove is flush with or protrudes out of the terminal head, the long groove extends along the length direction of the terminal insertion end, and the extending length of the long groove is not less than the length of the terminal which needs to be adapted to the insertion end.

In the insertion ends of the two terminals 21 forming one differential signal pair 211, the surface of the terminal adjacent to the other terminal is defined as a first side surface 216, the surface opposite to the other terminal is defined as a second side surface 217, and the surface opposite to the contact surface 215 is defined as a third side surface 218; the injection molding insert is provided with elongated grooves at the first side surface 216 and the second side surface 217, and the first elongated groove 2311 at the first side surface 216 is a through groove, so that the first side surface 216 is completely exposed to air; the second long groove 2313 located at the second side surface 217 is a blind groove which is open towards the contact surface 215 side, so that the part of the second side surface 217, which is connected with the contact surface 215, is exposed in the air, and thus, excessive plastic generated in the injection molding process is prevented from overflowing to the contact surface, the contact effect is prevented from being influenced, and the performance of a signal pair is prevented from being influenced.

In the terminal fixing structure, the first long grooves 2311 of the two terminals forming the same differential signal pair are communicated, and a through groove is formed between the contact areas of the two terminals, so that the terminals can be fixed by an auxiliary tool during injection molding, and the stability between the two terminals forming the same signal pair during injection molding can be ensured.

In the terminal fixing structure, an extension length of the first long groove 2311 in the inserting direction is smaller than an extension length of the second long groove 2313 in the inserting direction.

In the terminal fixing structure, the injection mold insert is also formed with a long groove at the third side 218, and the long groove is a blind groove exposing a part of the third side 218 of the terminal to the air, so as to meet the purpose of the length of the terminal.

In the terminal fixing structure, the long groove at the third side exposes the side of the third side 218 close to the other terminal to the air, so as to adjust the impedance of the terminal.

In the terminal fixing structure, the long grooves on the third side include the third long grooves 2314 extending in the terminal inserting direction and the fourth long grooves 2315 distributed at intervals in the terminal inserting direction, and the third long grooves 2314 are communicated with the fourth long grooves 2315, so that the area of the terminal exposed in the air is increased, impedance can be adjusted, a space can be provided for an auxiliary tool for supporting the terminal during injection molding of the terminal, the position of the terminal is relatively stable during injection molding, the terminal is not easy to bend, and the injection molding quality of the terminal is improved.

In the above-mentioned terminal fixing structure of the mating terminal contact area, the head portion of the mating terminal 21 is further covered with plastic for guiding the mating terminal into the terminal contact surface 215.

In the above-mentioned terminal fixing structure of the insertion end contact region, the plastic wrapped on the head of the insertion end of the terminal 21 has a leading bevel 2321 at the front end and a straight section 232 at the rear end.

In the above-mentioned terminal fixing structure of the insertion end contact region, the two side edges of the end surface of the tail portion of the straight section 232 are further extended backward to form the guiding arms 233 for preventing the insertion end from deflecting during the insertion process.

In the structure for fixing the terminal at the insertion end contact region, the shielding plate 22 is further provided with a bend 221 for accommodating the insertion end of the differential signal pair 211 and shielding between adjacent differential signal pairs 221.

Compared with the prior art, the invention has obvious advantages and beneficial effects. By means of the technical scheme, the invention can achieve considerable technical progress and practicability, has wide industrial utilization value and at least has the following advantages:

according to the invention, plastic is wrapped in the area of the terminal insertion end except the contact surface, so that the terminal insertion end is stable and reliable, and the terminal contact and transmission performance is better. And the contact area of the invention and the terminal contact surface is not wrapped by plastic, which can effectively prevent the excessive plastic from overflowing to the terminal contact surface to influence the transmission performance of the terminal. Finally, the plastic packaging positions of the two terminal insertion ends forming the differential signal pair are designed, so that the transmission performance of the terminals is enhanced, and the use requirement of the high-speed connector is met.

Drawings

FIG. 1 is a schematic view of the overall construction of an adapter;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the upper housing of the adapter;

FIG. 4 is another view of FIG. 3;

FIG. 5 is a schematic view of a terminal module;

fig. 6 is another schematic view of the terminal module;

fig. 7 is a schematic view of another view direction of the terminal module;

fig. 8 is a schematic view of the terminal module with the shield blades removed;

fig. 9 is another schematic view of the terminal module with the shield blades removed;

fig. 10 is a schematic view of a terminal module in a further viewing orientation with the shield blades removed;

fig. 11 is a cross-sectional view of the terminal module with the shield blades removed;

FIG. 12 is a schematic view of a shield sheet;

FIG. 13 is a schematic view of another viewing orientation of the shield blades;

FIG. 14 is a schematic view of a further viewing orientation of the shield blades;

FIG. 15 is an enlarged view of a portion of FIG. 1;

FIG. 16 is an enlarged view of a portion of FIG. 5;

[ description of main element symbols ]

1: shell body

11: upper shell

111: cantilever arm

112: boss

113: clamping groove

114: groove

115: signal positioning hole

116: lock slot

12: lower shell

2: terminal module

21: terminal with a terminal body

211: differential signal pair

213: hot riveting column

214: slotting

22: shielding sheet

221: u-shaped bend

2211: edge folding

222: projection

223: gap(s)

23: insulator

231: u-shaped fixing groove

232: straight section

233: guide arm

Detailed Description

To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Referring to fig. 1-16, which are schematic structural diagrams of parts of an adapter according to an embodiment of the present invention, the adapter includes a housing 1 and a plurality of terminal modules 2 mounted in the housing 1 in a row, each terminal module 2 includes a terminal 21, an insulator 23, and a shielding plate 22, where the terminal 21 is located in the insulator 23, a node distance of each terminal 21 is kept constant by the insulator 23, and the shielding plate 22 covers one side of the insulator 23 for shielding the terminal 21 on the side.

The terminal 21 includes signal terminals, two adjacent signal terminals form a differential signal pair 211, in the embodiment of the present invention, both ends of the differential signal pair 211 are insertion ends, both ends of the shielding plate 22 are provided with bends for accommodating the insertion ends of the single differential signal pair 211, in the embodiment of the present invention, the bends are U-shaped bends 221, the U-shaped bends 221 include two bent edges 2211 and a bottom edge 2213, the bottom edge 2213 is a portion of the shielding plate 22 corresponding to the differential signal pair 211, and the bent edges 2211 are formed by bending portions of the shielding plate located at both sides of the bottom edge 2213 in the direction of the differential signal pair. Therefore, the U-shaped bending part forms semi-surrounding type shielding for the insertion ends of the differential signal pairs 211, and shielding between the insertion ends of the adjacent differential signal pairs and between the adjacent terminal modules is achieved. Preferably, the front end surface of the folded U-shaped bend 221 protrudes out of the front end surface of the insertion end of the differential signal pair, so as to ensure the shielding effect.

In order to solve the problem that two folding edges 2211 cannot be formed at the same time at the positions between the adjacent signal pairs on the shielding sheet 22 due to the limitation of the spacing between the signal pairs, in the embodiment of the present invention, in the arrangement direction of the differential signal pairs 211 in the terminal module 2, the U-shaped bends 221 are distributed at the positions separated by one differential signal pair, so that the insertion ends of the adjacent differential signal pairs 211 are located in the corresponding U-shaped bend 221, and the other does not have the corresponding U-shaped bend 221, but the folding edges 2211 at the two sides of the U-shaped bend 221 can realize the separation between the insertion ends of the adjacent differential signal pairs 211, thereby realizing the shielding between the insertion ends of the adjacent signal pairs. In the embodiment of the present invention, in order to reliably surround the insertion end of the differential signal pair, the folded edge 2211 has a sufficient width, so that a gap 223 is formed between the adjacent U-shaped bends 221 by machining the folded edge 2211. Preferably, the tail of the U-shaped bend 221 is further provided with a protrusion 222 extending backward along the insertion end of the differential signal pair.

Due to the U-shaped bend 221 on the shielding sheet 22, the purpose of shielding protection can be realized by only one shielding sheet 22 for a single terminal module, and the shielding effect can be achieved without adding other parts. Preferably, the U-shaped bends 221 at the two ends of a single shielding plate 22 are distributed along the arrangement direction of the differential signal pair 211 in a staggered manner, so that two insertion ends of the same differential signal pair are located in the U-shaped bends 221 on the shielding plate 22, and the shielding plate 22 is not provided with the U-shaped bends 221 adapted to the other insertion ends, that is, the shielding plate 22 of the present invention has a 180-degree rotational symmetric structure, so that the two ends of the shielding plate can be freely exchanged, and the assembly does not need to be distinguished, but is not limited thereto.

The terminal module 2 may be provided with the shielding plate 22 only on one side of the arrangement direction of the vertical differential signal pair 211, or may be provided with the shielding plates 22 on both sides of the arrangement direction of the vertical differential signal pair 211. When the shielding plate 22 exists only on one side of the terminal module, the insertion ends of the differential signal pairs 211 in a single terminal module 2 are alternately distributed in a U-shaped bent surrounding manner and a U-shaped bent surrounding manner, so that not only is the shielding between the insertion ends of adjacent signal pairs realized, but also the problem that due to the fact that the U-shaped bends 221 are continuously arranged on the shielding plate 22 (each differential signal pair has a corresponding U-shaped bend), due to the distance limitation between adjacent differential signal pairs, the shielding plate material between the adjacent differential signal modules is insufficient, and two folded edges 2211 cannot be formed at the same time is solved.

In the embodiment of the present invention, the shielding plates 22 are simultaneously disposed on two sides of a single terminal module 2, and the bending directions of the U-shaped bends 221 bent edges 2211 on the two shielding plates 22 are opposite and are both bent toward the direction of the terminal, so that the U-shaped bends located at the same end on the two shielding plates 22 are distributed in a staggered manner in the arrangement direction of the differential signal pairs 211, and the insertion end of each differential signal pair is located in the corresponding U-shaped bend 221, thereby not only enhancing the shielding effect of the single module, but also balancing the stress on the whole terminal module 2, and effectively solving the problem that the terminal module is unbalanced in stress when in use and assembly.

In the embodiment of the present invention, the root of the two bent edges 2211 of the U-shaped bend 221 extend backwards to form a protrusion 222, the shielding plate 22 is further provided with a notch 223 corresponding to the U-shaped bend on the other shielding plate at a position between the adjacent U-shaped bends 221, when the shielding plates on both sides of the terminal module are assembled, the protrusion 222 at the root of the U-shaped bend of one shielding plate enters the notch 223 of the other shielding plate, and the two shielding plates are in contact by the protrusion at the U-shaped bend and the notch 223. Preferably, the protrusion 222 is in contact with the side wall of the notch 223 by welding, but not limited thereto. According to the invention, the U-shaped bent tail protrusion 222 and the notch 223 of the other shielding sheet are assembled and then welded together in a welding mode, so that the differential pair signal transmission in the U-shaped can be better shielded in the signal transmission process, and the high-speed transmission is realized.

In an embodiment of the present invention, under the condition that the node distance between the differential signal pairs is not changed, the present invention can combine the differential signal pairs with the same node distance into a terminal module by the buckling of the two shielding plates 22 and the U-shaped bends 221 distributed at intervals at the end portions thereof, and at any end of the terminal module, the U-shaped bends 221 with the opposite bending directions of the bent edges 2211 are distributed along the arrangement direction of the differential signal pairs in the terminal module in a staggered manner.

Preferably, the number of the differential signal pairs 211 is 2N (N is greater than 0), so that the two shielding plates 22 of the terminal module have the same structure, and the bends at the two ends of each shielding plate are distributed in a staggered manner along the arrangement wind direction of the differential signal pairs, that is, the positions corresponding to the two ends of the unified differential signal pair are located, one end of each shielding plate is bent correspondingly, the other end of each shielding plate is not bent correspondingly, and the shielding plates have a 180-degree rotational symmetry structure, so that the mounting directions of the two ends of each shielding plate do not need to be distinguished during assembly. In the embodiment of the invention, the shielding sheets with completely same structures are adopted at the two sides of the terminal module, so that errors generated during the processing and assembly of the shielding sheets can be reduced, and the processing and assembly are more convenient.

Through the reverse buckling of the two identical shielding pieces 22 at the two sides of the differential signal pair with the unchanged node distance, the assembly of one terminal module can be completed under the conditions of ensuring that the distance between the 2N differential signal pair and the node is unchanged and improving the signal transmission rate, and in the assembly and use process of the terminal module, the assembly direction and the use direction of the differential signal pair 211 do not need to be distinguished, so that the assembly and the use are convenient.

In the embodiment of the present invention, the number of the differential signal pairs 211 is 4, the node distance of the 4 differential signal pairs 211 is kept unchanged by the insulator 23, two identical shielding plates 22 are respectively covered on one side of the injection molding insert, two ends of each shielding plate 22 are provided with 2U-shaped bends 221 at an interval of one differential signal pair, and the shielding plates 22 have a 180-degree rotational symmetry structure, so that two insertion ends of the same differential signal pair are respectively located in the U-shaped bends on different shielding plates 22. When two shielding pieces are buckled, the U-shaped bend on one shielding piece is contacted with the notch 223 of the other shielding piece through the tail bulge 222, 4U-shaped bends are distributed in the distribution direction of the signal pairs, the insertion combination ends of the 4 signal pairs are respectively contained in the corresponding U-shaped bends, and the adjacent signal pairs are positioned in the bends of different shielding pieces, so that the integrity of signal transmission of the 4 differential pairs is ensured, and the 4 differential pairs form a terminal module.

In other embodiments of the present invention, the shield bends may be other structures having a semi-enclosed shield cavity capable of receiving the plug ends of the differential signal pairs.

In the embodiment of the present invention, the insulator 23 is an injection mold insert, and the terminal 21 and the injection mold insert are formed into a one-shot injection mold block by injection molding. Other positions of the insertion end of the terminal 21 except the contact surface (the surface contacted with the adaptive end terminal) are wrapped by plastic injection molding, namely the fixation of the insertion end of the terminal is realized by wrapping the plastic on the part outside the insertion end contact surface of the terminal 21, the fixation of the terminal 21 at the contact end can be enhanced while the insertion end contact surface is effectively avoided, so that the stability of the terminal 21 is enhanced, and the contact of the insertion end is more reliable.

In order to prevent the excessive plastic from overflowing to the contact surface of the insertion end of the terminal 21 during injection molding and affecting the contact of the terminal, at least a part of at least one side surface of the insertion end of the terminal 21, which is connected with the contact surface 215, is not wrapped by the plastic, that is, at least one side surface of the two side surfaces, which is at least adjacent to the contact surface 215, is not wrapped by the plastic, so as to prevent the excessive plastic from overflowing to the contact surface 215. Therefore, at least one long groove is formed in the part, wrapped by the terminal insertion end, of the injection mold insert, the long groove is located on the side face, opposite to the adjacent terminal, of the terminal, the opening direction of the long groove is the same as that of the contact face, the long groove extends along the length direction of the terminal insertion end, the extending length is not less than the length, matched with the insertion end, of the terminal, and the front end of the long groove is at least flush with the head of the terminal. The long groove enables the surface of the terminal inserting end connected with the contact surface to have a part without plastic wrap, and the part of the side surface connected with the contact surface is exposed in the air. The long groove is a through groove or a blind groove, when the long groove is the through groove, the side face of the long groove is completely exposed in the air, and when the long groove is the blind groove, only the part, far away from the contact face, of the side face of the long groove is exposed in the air.

In order to improve the transmission performance of the terminal 21, in the embodiment of the present invention, the injection mold inserts on two side surfaces of the terminal adjacent to the contact surface 215 are provided with long grooves, and the long grooves enable one sides of the two side surfaces close to the contact surface 215 to be free from plastic package and exposed to air. The two terminals forming one differential signal pair 211 have a plurality of side surfaces adjacent to the contact surface 215, and the two side surfaces connected to the contact surface 215 are defined as a first side surface 216 and a second side surface 217, respectively, where the first side surface 216 is a surface adjacent to the other terminal, and the second side surface 217 is a surface opposite to the other terminal. The side opposite to the contact surface 215 is defined as a third side 218, and the first side 216, the second side 217 and the third side 218 extend along the insertion direction.

The slot at the first side surface 216 is a first slot 2311, and the first slot 2311 is a through slot, so that the first side surface 216 is completely exposed to air without any plastic wrap. The slot at the second side 217 is a second slot 2313, and the second slot 2313 is a blind slot open to the side of the contact surface 215, so that only the portion of the second side 217 that is connected to the contact surface 215 is exposed to the air, and the portion that is away from the contact surface 215 is wrapped with plastic. In the embodiment of the present invention, the first long grooves 2311 at the first side surfaces of the two terminals constituting the same differential signal pair are communicated, so that a through groove is formed between the two terminals, and the through groove exposes the first side surfaces of the two terminals to the air. In the embodiment of the present invention, the extension length of the first long groove 2311 along the inserting direction is smaller than the extension length of the second long groove 2313 along the inserting direction.

A long groove is also formed at the third side 218 of the terminal, and is a blind groove which partially exposes the third side 218 of the terminal to the air, and the long groove can realize the adjustment of impedance. In the embodiment of the present invention, the elongated slots formed at the third side 218 include a third elongated slot 2314 extending along the terminal inserting direction and fourth elongated slots 2315 spaced apart along the terminal inserting direction. The third long groove 2314 enables one side of the third side surface of the terminal close to the other terminal to be free of plastic package and exposed in air. Preferably, the third long groove 2314 has the same extension length as the first long groove 2311, and the third long groove 2314 is communicated with the first long groove 2311 to form a stepped groove extending along the thickness direction of the terminal.

The fourth long grooves 2315 are blind grooves communicated with the third long grooves 2314, preferably, two fourth long grooves 2315 are arranged on the third side face of each terminal, the fourth long grooves 2315 further increase the area of the third side face 218 exposed in the air without plastic package, impedance can be adjusted, space can be provided for auxiliary tools for supporting the terminals during terminal injection molding, the terminals are guaranteed to be relatively stable in position during injection molding, bending is not prone to occurring, and injection molding quality of the terminals is improved.

In the embodiment of the present invention, a surface of the second long groove 2311 connected to the second side surface is an inclined surface 23111.

The arrangement of the long groove can effectively prevent the redundant plastic generated in the injection molding process of the insertion end of the terminal from overflowing to the contact surface of the terminal, increase the contact area of the terminal and air, adjust the impedance of the terminal, facilitate the contact of the insertion end and the terminal and facilitate the transmission of performance.

In the embodiment of the present invention, in order to ensure the stability of the insertion ends of the differential signal pairs, a terminal fixing portion for wrapping the insertion ends of the differential signal pairs is formed at the front end of the injection mold insert of the present invention, preferably, the terminal fixing portion is a U-shaped fixing groove 231, the insertion end of each differential signal pair is wrapped in the U-shaped fixing groove 231 by injection molding, the first long grooves 2311 at the first side surfaces 216 of the two signal terminals are communicated with each other so that the bottom of the U-shaped fixing groove 231 has a through hole, and the third long groove 2314 and the fourth long groove 2315 at the third side surfaces of the two signal terminals are both located on the surface of the bottom of the U-shaped fixing groove 231 opposite to the ends.

After the terminals and the injection mold insert are injection molded, the third slot 2314 makes the third sides 218 of the two terminals 21 forming a signal pair have no plastic wrap on the side close to the other terminal, are exposed to air, and have plastic wrap on the side far from the other terminal. The first side surface 216 of the single terminal is not wrapped by plastic due to the arrangement of the first long groove 2311, the second side surface 217 is wrapped by plastic only at one side far away from the contact surface 215 due to the existence of the second long groove 2313, namely, the part (the part which is not connected with the contact surface) of the second side surface 217 close to the bottom of the U-shaped fixed groove 231 is wrapped by plastic, and the part (the part which is connected with the contact surface) far away from the bottom of the fixed groove is not wrapped by plastic, namely, the terminal is spaced from the wall of the U-shaped fixed groove.

In the embodiment of the present invention, after the shielding plate 22 is assembled in place, the U-shaped fixing groove 231 is accommodated in the corresponding U-shaped bend 221, and the U-shaped fixing groove 231 and the U-shaped bend 221 are further limited by the matching of the concave-convex structure, so as to prevent the two from moving or deflecting relatively under a vibration environment or an insertion force, thereby ensuring the distance between the differential signal pair and the shielding to be constant, and ensuring the transmission of signal performance. In other embodiments of the present invention, the shield piece bending and the terminal fixing portion also have an adaptive structure, that is, after the shield piece is assembled in place, the terminal fixing portion is accommodated in the shield piece bending, and the terminal fixing portion is limited by the concave-convex structure. That is, neither the bent shield piece nor the terminal fixing portion is limited to the U-shaped structure of the present invention.

In the embodiment of the present invention, the U-shaped fixing groove 231 and the U-shaped bend 221 are positioned by a snap structure on two side walls. Specifically, the outer surfaces of the two side walls of the U-shaped fixing groove 231 are protruded with clamping platforms 2312, the two side walls of the U-shaped bend 221 are provided with corresponding bayonets 2212, and the shielding plates at the insertion end are firmly and reliably buckled on the plastic through the matching of the clamping platforms and the bayonets, so that the distance between the differential signal pairs and the shielding plates is constant.

In other embodiments of the present invention, only the fixing requirement of the differential signal pair at the insertion end needs to be satisfied, and the terminal fixing portion formed by the injection molding insert at the insertion end is not limited to the structure of the U-shaped fixing groove 231. No matter how the whole structure of the terminal fixing part is changed, the position relations among the first long groove, the second long groove, the third long groove and the fourth long groove and the terminal inserting end are unchanged. The injection molding insert is provided with a plurality of hot riveting columns 213 on the surface, the shielding sheet 22 is provided with holes corresponding to the hot riveting columns 213, and the shielding sheet 22 is fixed with the injection molding insert through a hot riveting process during assembly.

In the embodiment of the present invention, the thermal rivets 213 are distributed on at least one side of the differential signal pair trace portion, and are uniformly spaced at intervals on one side of the differential signal pair trace portion. In order to ensure the attaching degree and the fixing reliability between the U-shaped fixing groove 231 and the U-shaped bending 221 of the shielding plate, the U-shaped fixing groove 231 and the U-shaped bending 221 are further fixed by hot riveting through a hot riveting column 213. Preferably, the injection mold insert is further provided with a hot riveting column 213 at a position close to the tail of the U-shaped fixing groove 231 for fixing between the U-shaped fixing groove 231 and the U-shaped bend 221, and the hot riveting column 213 is arranged to enable the shield and the injection mold insert to be attached more tightly at the insertion end. According to the invention, the terminal fixing part (U-shaped fixing groove) and the shielding sheet are bent at the position close to the tail part (the position where the terminal fixing part is connected with the injection molding insert main body/the position where the shielding sheet is bent and connected with the shielding sheet main body) for hot riveting and fixing, so that the fixing and the attaching between the terminal fixing part and the injection molding insert main body can be ensured, the terminal inserting area can be avoided, and the terminal performance is prevented from being influenced.

According to the invention, the shielding sheet and the plastic are bonded without a gap through the hot riveting point of the insertion end and the buckle at the U-shaped bending part, and the distance between the terminal and the shielding sheet is ensured to be constant, so that the transmission of signal performance is facilitated.

In the embodiment of the invention, the head part of the insertion end of the terminal 21 is wrapped by plastic, and the insertion end of the terminal guides the opposite insertion end to enter the insertion surface of the terminal through the plastic wrapping the head part of the terminal, so that opposite insertion is realized. Specifically, the plastic wrapping the insertion end of the terminal is a horizontally extending straight section 232 located at the front end of the insertion end, so that the insertion end can be correctly inserted, and the partial insertion or the misplugging is prevented. The end face of the front end of the straight section 232 is an oblique chamfer 2321 with a guiding function, and the two sides of the front end of the straight section 232 and the upper and lower end faces are provided with oblique chamfers 2321 for guiding so as to facilitate better guiding of the opposite insertion end.

The rear end edge position of the straight section 232 is respectively extended with a guiding arm 233 along the length direction for preventing the skew of the inserting end in the inserting and closing process, one side of the guiding arm close to the terminal is provided with a guiding inclined plane 2331 gradually close to the terminal from front to back, and the arrangement of the guiding inclined plane 2331 can guide the moving of the inserting end terminal to the terminal inserting and closing surface, so as to ensure the effective contact of the terminal.

In the embodiment of the present invention, the guiding arm 233 is an L-shaped plastic wall, the horizontal section at the front end thereof is connected to the end of the straight section 232, the vertical section at the rear end thereof is blocked outside the terminal, the inner side of the vertical section is provided with a guiding inclined plane 2331, and a groove is further formed between the inner side of the vertical section and the upper portion of the side wall of the terminal to prevent the plastic of the vertical section from overflowing to the contact surface on the upper surface of the terminal to affect the contact effect.

In the embodiment of the present invention, the housing 1 is formed by fastening the front ends of the upper housing 11 and the lower housing 12, specifically, the front end faces of the upper housing 11 and the lower housing 12 are butted, and the convex-concave matching locking is realized by the boss 112 outside the cantilever 111 protruding from the front end of one end and the clamping groove 113 distributed on the periphery of the other end. Preferably, the upper housing 11 and the lower housing 12 have the same structure, and the cantilever 111 and the slot 113 are distributed on the upper housing. The peripheries of the upper shell 11 and the lower shell 12 are provided with locking grooves 116 for matching and locking with the matched connector, but the invention is not limited to this.

In the embodiment of the present invention, the upper housing 11 and the lower housing 12 are both of a structure with an open front end and a closed rear end, and the end surfaces of the rear portions of the upper housing 11 and the lower housing 12 are both provided with signal positioning holes 115 for the insertion ends of the differential signal pairs to penetrate through, the signal positioning holes 115 can limit the U-shaped bends 221 accommodating the differential signal pairs 211, and the size of the signal positioning holes 115 is slightly larger than that of the U-shaped bends 221, so that the signal positioning holes 115 can limit the deflection of the insertion ends of the differential signal pairs 211. In order to prevent interference during assembly, an avoidance groove 116 for avoiding the position where the shielding plate 22 is thermally riveted with the plastic at the U-shaped bend 221 is formed in a position corresponding to the signal positioning hole 115.

In the embodiment of the present invention, the end surfaces of the tail portions of the upper housing 11 and the lower housing 12 are further provided with grooves 114 at intervals, which are matched with the adapting end housing to realize insertion direction identification and deflection limit.

The invention also provides a connector, one end of the connector is an inserting end, the other end of the connector is a crimping end, and the structure of the inserting end of the connector is completely the same as that of the adapter. The differential signal pair at the crimping end of the connector can also be accommodated in the U-shaped bend of the shielding sheet, and at the moment, the crimping part of the differential signal pair at the crimping end extends out of the U-shaped bend.

In the embodiment of the invention, the terminals are all signal terminals. Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.

Claims (13)

1. The utility model provides a terminal fixed knot constructs, includes the terminal module, and this terminal module includes terminal and the mold insert of moulding plastics, its characterized in that: the injection molding insert is fixed by the terminal insertion joint end through plastic wrapping of other terminal areas outside the contact surface.

2. The terminal fixing structure according to claim 1, wherein: the injection molding insert is provided with at least one long groove at the terminal insertion end, and the long groove is positioned at the side surface of the terminal opposite to the adjacent terminal, so that the part of the side surface, which is connected with the contact surface, is exposed in the air.

3. The terminal fixing structure according to claim 2, wherein: the front end of the long groove is flush with or protrudes out of the terminal head part, the long groove extends along the length direction of the terminal inserting end, and the extending length of the long groove is not less than the length of the terminal which needs to be matched with the opposite inserting end.

4. The terminal fixing structure according to claim 3, wherein: in the insertion ends of two terminals forming a differential signal pair, the surface of the terminal adjacent to the other terminal is defined as a first side surface, the surface opposite to the other terminal is defined as a second side surface, and the surface opposite to the contact surface is defined as a third side surface; the injection molding insert is provided with elongated slots at the first side surface and the second side surface, and the first elongated slot at the first side surface is a through slot, so that the first side surface is completely exposed in the air; the second long groove at the second side surface is a blind groove opened toward the contact surface side, so that the part of the second side surface, which is connected with the contact surface, is exposed to the air.

5. The terminal fixing structure according to claim 4, wherein: the first elongated slots at the first side surfaces of the two terminals forming the same differential signal pair are communicated, so that a through groove is formed between the two terminals.

6. The terminal fixing structure according to claim 4, wherein: the extension length of the first long groove along the insertion direction is smaller than that of the second long groove along the insertion direction.

7. The terminal fixing structure according to claim 4, wherein: the injection mold insert is also formed with an elongated slot at the third side, which is a blind slot that exposes a portion of the third side of the terminal to air.

8. The terminal fixing structure according to claim 7, wherein: the long groove at the third side surface is communicated with the first long groove, so that one side of the third side surface of the terminal close to the other terminal is exposed to the air.

9. The terminal fixing structure according to claim 8, wherein: the long grooves on the third side surface comprise third long grooves extending along the terminal inserting direction and fourth long grooves distributed at intervals along the terminal inserting direction, and the third long grooves are communicated with the fourth long grooves.

10. A terminal holding structure according to any one of claims 1 to 9, wherein: the terminal inserting end head part is also wrapped with plastic for guiding the opposite inserting end to enter the terminal contact surface.

11. The terminal fixing structure according to claim 10, wherein: the plastic wrapped on the head part of the terminal insertion end is provided with a guide inclined chamfer at the front end and a straight section at the rear end.

12. The terminal fixing structure according to claim 8, wherein: the edge positions of two sides of the end surface of the straight section tail part also extend backwards to form a guide arm for preventing the opposite insertion end from deflecting in the insertion process.

13. A terminal module comprising the terminal holding structure according to any one of claims 1 to 12, wherein: the shielding piece is further provided with a bend used for accommodating the plug-in end of the differential signal pair and realizing shielding between the adjacent differential signal pairs.

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