CN112510401A

CN112510401A - Electrical connector

Info

Publication number: CN112510401A
Application number: CN202011410188.9A
Authority: CN
Inventors: 田立春; 曾铁武; 程牧; 段红勋; 赵雷; 周英豪
Original assignee: Wenzhou Yihua Connector Co Ltd
Current assignee: Wenzhou Yihua Connector Co Ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-03-16

Abstract

An electrical connector for connecting a cable to a circuit board includes a base having an upwardly opening receiving cavity and a plurality of terminal dies stacked in parallel and downwardly inserted into the receiving cavity. Each terminal die is connected with a plurality of cables, and the terminal die comprises a plurality of conductive terminals welded on the cables, insulators coated outside the conductive terminals, and conductive slide sheets provided with a plurality of grooves for accommodating the insulators. Each conductive terminal is provided with a terminal pin which extends downwards to form an insulator, and the terminal pins are connected to the circuit board. The electric connector is characterized in that protruding blocks are arranged at two horizontal ends of the conductive carrier, a gap is formed between each protruding block and the circuit board, and when the electric connector is detached from the circuit board, the detaching jig can extend into the gap to detach the electric connector.

Description

Electrical connector

Technical Field

The present disclosure relates to electrical connectors, and particularly to an electrical connector for connecting a cable to a circuit board.

Background

Utility model publications CN210607748U and CN210866602U of eastern china news tauo electronics limited disclose a sheet-type wire-to-board connector and a housing connector for assembling the stacked sheet-type wire-to-board connectors together. The lug is arranged on the end cover, the end cover and the flaky wire-to-board connector are separated parts, and the end cover can be separated from the flaky wire-to-board connector during disassembly operation, so that the possibility of difficult disassembly and even failure of disassembly is realized.

Disclosure of Invention

All technical problems of solving of this application provide a wire to board connector, and it is good to dismantle structural strength, and the structure is reliable.

In order to solve the above technical problem, the present application provides an electrical connector for connecting a cable to a circuit board, which includes a base having an upward opening receiving slot and a plurality of terminal dies stacked in parallel and inserted downward into the receiving slot. And a plurality of cables are connected to each terminal die. The terminal die sheet comprises a plurality of conductive terminals welded on the cable, insulators coated outside the conductive terminals, and conductive slide sheets provided with a plurality of grooves for accommodating the insulators. Each conductive terminal is provided with a terminal pin which extends downwards to form an insulator, and the terminal pins are connected to the circuit board. The electric connector is characterized in that protruding blocks are arranged at two horizontal ends of the conductive carrier, a gap is formed between each protruding block and the circuit board, and when the electric connector is detached from the circuit board, the detaching jig can extend into the gap to detach the electric connector.

As a further design, the base is provided with a horizontal bottom wall and two side walls extending perpendicular to the bottom wall, the two side walls are provided with guide grooves, the metal slide is provided with guide ribs, and when the terminal die piece is inserted into the base, the guide ribs are matched with the guide grooves, so that the terminal die piece is limited at a preset position to be installed.

As a further design, the guide rib is provided with a wedge-shaped fixture block, the bottom wall of the guide groove of the base is provided with a clamping hole, when the terminal die piece is installed in the base, the two side walls of the wedge-shaped fixture block are firstly opened, and after the terminal die piece is installed in the base, the wedge-shaped fixture block slides into the clamping hole to realize clamping fit.

As a further design, the conductive slide is a metal die casting, the conductive slide is provided with a fixing groove with an upward opening, the electric connector further comprises a fixing connecting sheet vertical to the terminal die sheet, the fixing connecting sheet is a metal piece and is provided with a connecting body extending vertical to the terminal die sheet and a fixing pin extending downwards from the connecting body and inserted into the fixing groove.

As a further design, each cable includes two signal conductors and two ground conductors extending out of one end of the cable, the corresponding conductive terminals connected to the cable include two ground terminals connected to the two ground conductors and two signal terminals connected to the two signal conductors, all the conductive terminals of each terminal die are arranged in a horizontal direction, the four conductive terminals connected to the same cable are arranged adjacently, the two signal terminals are located in the middle, and the two ground terminals are located at the two ends.

As a further design, the insulator includes a first molding part and a second molding part, the first molding part is a plastic covering each conductive terminal by insert molding, each conductive terminal includes a middle part covering the first molding part and a cable welding part extending upwards from the first molding part, the second molding part is a plastic formed by insert molding, that is, a first molding component formed by fixing the first molding part and welding the cable to the conductive terminal is put into the conductive slide and then formed in a groove of the conductive slide by integral molding.

As a further design, adjacent grounding terminals of two adjacent cables are connected into a whole, a guide hole is arranged between the two grounding terminals connected into a whole, the conductive carrier is provided with a guide post inserted into the guide hole, and when the terminal assembly fixed at the first molding part is installed in the metal carrier, the guide hole is in guide fit with the guide post.

As a further design, the integrative ground terminal of connection is equipped with the connecting hole that is close to terminal foot and cable welding part, electrically conductive slide glass is in corresponding the position of connecting hole is provided with the spliced pole, the connecting hole with spliced pole interference fit is in order to realize stable ground connection, the guide post height surpasss the spliced pole is in order to play better guide effect, simultaneously, the guide post is the microscler rectangle of direction from top to bottom to prevent the cross talk between the adjacent cable signal better.

As a further design, the conductive carrier comprises a positioning block positioned on the upper side of the first primary forming part, and the positioning block is matched with the first primary forming part in the process that the first primary forming component is placed in the conductive carrier to play a role in positioning.

As a further design, the first forming part is provided with a avoiding hole, the avoiding hole avoids the guide post and the connecting post, and the jig is convenient to press near the guide post and the connecting post.

Drawings

Fig. 1 is a perspective view of an electrical connector according to an embodiment of the present application.

Fig. 2 is a schematic view of the electrical connector base of fig. 1 removed.

Fig. 3 is an exploded view of the electrical connector shown in fig. 1.

Fig. 4 is an exploded view of the alternative view shown in fig. 3.

Figure 5 is an exploded view of the terminal die shown in figures 3 and 4 (where the first and second overmolding are shown without separate parts for clarity, but the actual first and second overmolding are not separate parts).

Fig. 6 is a perspective view of the conductive slide of fig. 5.

Fig. 7 is a perspective view of the conductive terminal and cable of fig. 4.

Fig. 8 is a perspective view of the first molding assembly of fig. 7 after the conductive terminals and the cable are molded into the first molding portion.

Fig. 9 is a perspective view of the first molding assembly of fig. 8 positioned in a predetermined position on the conductive carrier sheet of fig. 6.

Fig. 10 is a perspective view of the terminal die of fig. 9 after the second overmolding is molded.

Fig. 11 is a partial sectional view in the direction of a-a in fig. 1.

Fig. 12 is a sectional view taken in the direction B-B in fig. 10.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1-12, an electrical connector 100 for connecting a cable 101 to a circuit board (not shown) is shown in accordance with the present application. The electric connector 100 comprises a base 10 provided with an upward opening containing groove, a plurality of terminal dies 20 which are stacked in parallel and inserted downwards in the containing groove, and a fixing connecting sheet 30 for fixing the upper ends of the plurality of terminal dies, wherein the upper end of each terminal die 20 is connected with a plurality of cables 101, each terminal die 20 comprises a plurality of conductive terminals 22 welded on the cables 101, insulators 24 coated outside the plurality of conductive terminals 22, and conductive carrier sheets 28 provided with a plurality of grooves 280 for containing the insulators 24, each conductive terminal 22 is provided with a terminal pin 252 extending downwards out of the insulator 24, and the terminal pins 252 are connected on a circuit board.

As shown in fig. 6, the conductive carrier 28 is a metal die-cast member, and fixing grooves 283 are formed at both ends thereof to be opened upward. The fixed connecting piece 30 is a metal piece and is formed by blanking a metal plate. The fixing connection piece 30 has a connection body 32 extending from the terminal mold piece 20 and a fixing leg 34 extending downward from the connection body 32 to be inserted into the fixing groove 283.

As shown in fig. 7, each of the cables 101 includes two signal conductors 104 and 106 and two

ground conductors

102 and 108 extending from one end of the cable, and the signal conductors 104 and 106 are used for transmitting differential signals. The corresponding conductive terminal 22 connected to the cable 101 includes two

ground terminals

222, 228 connecting the two

ground conductors

102, 108 and two

signal terminals

224, 226 connecting the two signal conductors 104, 106. All the conductive terminals 22 of each terminal die 20 are horizontally arranged, and four conductive terminals 22 of the same cable connection 101 are adjacently arranged, and two

signal terminals

224 and 226 are located at the middle position, and two

ground terminals

222 and 228 are located at the two end positions.

The insulator 24 shown in fig. 5 includes a first overmold 242 and a second overmold 246, and is actually formed by two-shot overmolding. As shown in fig. 6 to 10, the specific forming method includes providing the formed conductive carrier 28, the conductive terminal 22 and the cable 101, and soldering the cable 101 to the conductive terminal 22. The first molding portion 242 is formed by plastic-coating the cable with the

conductive terminals

22 and 101, so that the middle portion 254 of each conductive terminal 22 is coated by the first molding portion 242, thereby forming a first molding assembly as shown in fig. 8. Each conductive terminal 22 includes a cable soldering portion 256 extending upwardly from the first molded portion 242. As shown in fig. 9, the first molding assembly shown in fig. 8 is placed in the groove 280 of the conductive carrier 20, and the second molding portion 246 is insert-molded, and the second molding portion 246 wraps the cable soldering portion 256 of the conductive terminal 22, the two signal conductors 104 and 106 and the two

ground conductors

102 and 108 extending out of one end of the cable 101, so as to protect the soldering point. As an alternative to other embodiments, the conductive terminals 22 may be overmolded with the first overmolding 242 before the first overmolding assembly is formed on the weld cable 101.

The adjacent ground terminals 228 connecting two adjacent cables 101 are connected into a whole, a guide hole 253 is arranged in the middle of the integrally connected ground terminal 228, the conductive carrier 280 is provided with a guide post 282 inserted into the guide hole 253, and when the first molding assembly is installed in the metal carrier 28, the guide hole 253 is in guide fit with the guide post 282.

The integrally connected ground terminal 228 is provided with two connecting holes 255 close to the terminal pin 252 and the cable soldering portion 256, the conductive carrier 28 is provided with a connecting column 284 at a position corresponding to the two connecting holes 255, and the connecting holes 255 and the connecting column 284 are in interference fit to realize stable grounding. The guide posts 282 are taller than the attachment posts 284 for better guidance. Meanwhile, the guide posts 282 are rectangular and elongated in the vertical direction to better prevent crosstalk between adjacent differential signals.

The conductive carrier 28 is further provided with a positioning block 286 positioned on the upper side of the first forming portion 242, and the positioning block 286 is matched with the first forming portion 242 in the process of placing the first forming assembly into the conductive carrier 28 to play a role in positioning. The first forming portion 242 is provided with an avoiding hole 244, the avoiding hole 244 avoids the guide column 282 and the connecting column 284, and a jig is convenient to press against the guide column 282 and the connecting column 284, so that deformation caused by overlarge interference force is prevented.

The second molding portion 246 includes a welding protection portion 243, the welding protection portion 243 covers the cable welding portion 256 of each of the cables 101 corresponding to the four

conductive terminals

222, 224, 226, 228, and the second molding portion 246 further includes a connecting portion 247 transversely connecting the welding protection portions 243 and cable protection portions 245 extending upward from the welding protection portions 243.

As shown in fig. 5, 6 and 10, the grooves 280 of the conductive carrier 28 are opened to the front side, when the terminal dies 20 are stacked and combined together, the front side of the differential signal of the rear-side terminal die 20 is shielded and isolated by the conductive carrier 28 of the front-side terminal die 20, but the front side of the foremost terminal die 20 has no conductive carrier 28, so that the electrical connector 100 further designs a shielding plate 40 formed by blanking a metal plate, and the shielding plate 40 is disposed on the front side of the foremost die-side terminal 20. As shown in fig. 4 and 11, the shielding plate 40 is provided with a convex shell 44 protruding toward the avoiding hole 244 at a position corresponding to the avoiding hole 246 of the terminal mold piece 20, and the convex shell 44 is provided with a receiving hole 440 at a position corresponding to the guide post 282. The guide posts 282 are inserted into the receiving holes 440 for interference fit. The sidewall of the receiving hole 440 is provided with a protrusion 442, and the protrusion 442 enhances the interference fit between the receiving hole and the guiding post. As shown in fig. 4, 10 and 12, the upper side of the shielding plate 40 is further provided with a fixing tab 402 formed by bending toward the terminal mold piece 20, the second secondary molding portion 246 is provided with an abdicating hole 248 at a corresponding position, the conductive slide 28 is provided with an interference hole 289 at a corresponding position, and the fixing tab 402 is inserted into the interference hole 289 through the abdicating hole 248. The shield plate 40 is fixed to the terminal die 20 by interference fit of the fixing tabs 402 with the interference holes 289 and interference of the bosses 44 with the guide posts 282.

Referring to fig. 7, the terminal pin 252 of each conductive terminal 22 is a fish eye structure, and after the electrical connector 100 is mounted on a circuit board, the terminal pin 252 is in interference fit with a conductive through hole of the circuit board, so as to achieve conductive connection. In order to achieve stable conductive connection, the terminal pins 252 and the conductive through holes have certain interference and insertion/extraction force requirements, and the number of the terminal pins is large, so that the electric connector and the circuit board are assembled and disassembled with great force. In the prior art, the protruding block and the terminal die, which are used for disassembling and assembling the jig, are separately designed into a continuous part, so that the risk of separating the two parts in the disassembling process exists. For this reason, in the present application, referring to fig. 3, fig. 6 and fig. 12, two horizontal ends of each conductive carrier 28 are provided with a protruding block 288, a gap is provided between the lower side of the protruding block 288 and the circuit board, when the electrical connector 100 is removed from the circuit board, a removal jig (not shown) can extend into the gap to perform the removal operation, and of course, during the installation process, the protruding block 288 can also be pressed, so as to press the terminal pins 252 of the electrical connector 100 into the circuit board.

Referring to fig. 2 and 12, the base 10 has a horizontal bottom wall 14 and two side walls 12 extending perpendicular to the bottom wall 14. The two side walls 12 are provided with guide grooves 122, the metal carrier 28 is provided with guide ribs 290, and when the terminal mold piece 20 is inserted into the base 10, the guide ribs 290 are matched with the guide grooves 122, so that the terminal mold piece 20 is limited to be installed at a preset position. The guide rib 290 is provided with a wedge-shaped fixture block 292, the bottom wall of the guide groove 122 of the base 10 is provided with a fastening hole 120, when the terminal mold piece 20 is installed in the base 10, the two side walls 12 are firstly opened by the wedge-shaped fixture block 292, and after the terminal mold piece 20 is installed in the base 10, the wedge-shaped fixture block 292 slides into the fastening hole 120 to realize fastening fit. The bottom wall 14 has bottom holes 140, and the terminal pins 252 of the

signal terminals

224, 226 pass through the bottom holes 140 and do not contact the base 10.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An electrical connector for connecting a cable to a circuit board, comprising: including being provided with the base and a plurality of parallel stackings of upwards opening accepting groove and downwards insert a plurality of terminal matrixes of arranging in the accepting groove, every being connected with a plurality of cables of terminal matrix, the terminal matrix including weld in a plurality of conductive terminal of cable, cladding in the insulator outside a plurality of conductive terminal and be equipped with a plurality of recesses and be used for acceping the electrically conductive slide glass of insulator, each conductive terminal is equipped with the terminal foot that downwardly extends the insulator, the terminal foot is connected on the circuit board, the horizontal both ends of electrically conductive slide glass are provided with the bulge piece, have the clearance between bulge piece and the aforementioned circuit board, will when electric connector demolishs from the aforementioned circuit board, the dismantlement tool can stretch into aforementioned clearance, demolishs the operation.

2. The electrical connector of claim 1, wherein: the base is provided with a horizontal bottom wall and two side walls extending perpendicular to the bottom wall, the two side walls are provided with guide grooves, the metal slide is provided with guide ribs, and when the terminal die piece is inserted into the base, the guide ribs are matched with the guide grooves, so that the terminal die piece is limited at a preset position and is loaded.

3. The electrical connector of claim 2, wherein: the terminal die is characterized in that the guide rib is provided with a wedge-shaped fixture block, the bottom wall of the guide groove of the base is provided with a clamping hole, when the terminal die is installed in the base, the two side walls of the wedge-shaped fixture block are firstly opened, and after the terminal die is installed in the base, the wedge-shaped fixture block slides into the clamping hole to realize clamping fit.

4. The electrical connector of claim 3, wherein: the electric connector also comprises a fixing connecting sheet vertical to the terminal die piece, wherein the fixing connecting sheet is a metal piece and is provided with a connecting body vertical to the terminal die piece and a fixing pin downwards extending from the connecting body and inserted into the fixing groove.

5. The electrical connector of claim 4, wherein: each cable comprises two signal conductors and two grounding conductors extending out of one end of the cable, the corresponding conductive terminals connected with the cable comprise two grounding terminals connected with the two grounding conductors and two signal terminals connected with the two signal conductors, all the conductive terminals of each terminal template are arranged in the horizontal direction, the four conductive terminals connected with the same cable are arranged adjacently, the two signal terminals are located in the middle, and the two grounding terminals are located at the two ends.

6. The electrical connector of claim 5, wherein: the insulator comprises a first forming part and a second forming part, wherein the first forming part is plastic coated on each conductive terminal in an embedded forming mode, each conductive terminal comprises a middle part coated in the first forming part and a cable welding part upwards extending out of the first forming part, the second forming part is plastic formed in an embedded forming mode, namely, a first forming component which is formed after the first forming part is fixed and the conductive terminal is welded with a cable is placed in the conductive slide, and the conductive slide is integrally formed in a groove of the conductive slide.

7. The electrical connector of claim 6, wherein: the adjacent grounding terminals of two adjacent cables are connected into a whole, a guide hole is arranged between the two grounding terminals which are connected into a whole, the conductive carrier is provided with a guide post inserted into the guide hole, and when the terminal component fixed at the first-time forming part is installed in the metal carrier, the guide hole is in guide fit with the guide post.

8. The electrical connector of claim 7, wherein: connect integrative ground terminal and be equipped with the connecting hole that is close to terminal foot and cable welding part, electrically conductive slide glass is in corresponding the position of connecting hole is provided with the spliced pole, the connecting hole with spliced pole interference fit is in order to realize stable ground connection, the guide post height surpasss the spliced pole is in order to play better guide effect, simultaneously, the guide post is the microscler rectangle of direction from top to bottom to prevent the cross talk between the adjacent cable signal better.

9. The electrical connector of claim 8, wherein: the conductive carrier comprises a positioning block positioned on the upper side of the first forming part, and the positioning block is matched with the first forming part in the process that the first forming component is placed into the conductive carrier to play a role in positioning.

10. The electrical connector of claim 9, wherein: the first-time forming portion is provided with a avoiding hole, the avoiding hole avoids the guide post and the connecting post, and a jig is convenient to press the guide post and the connecting post.