Electrical Connector and Cooking Appliance

Abstract

An electrical connector for connecting a cable to a circuit board, comprising a base provided with an upwardly opening receiving groove, a plurality of terminal modules stacked in parallel and inserted downwardly into the receiving groove, and a fixed connection piece for fixing the plurality of terminal modules. Each of the terminal modules is connected with a plurality of cables. The terminal module includes a plurality of conductive terminals welded to the cables, an insulator coated outside the plurality of conductive terminals, and a conductive carrier sheet provided with a plurality of grooves for receiving the insulator. Each of the conductive terminals is provided with a terminal leg extending downwardly out of the insulator, and the terminal leg is used for connecting to the circuit board. Each terminal module is assembled together with the base and the fixed connection piece, with a simple structure, convenient assembly and relatively low production cost.

Description

Technical Field

[0001] The present application relates to an electrical connector, and particularly to an electrical connector for connecting a cable to a circuit board. Background Art

[0002] The utility model announcements CN210607748U and CN210866602U of Dongguan Xuntao Electronics Co., Ltd. disclose a sheet type wire-to-board connector and a housing connector for assembling a stack of sheet type wire-to-board connectors together. The overall structure of this kind of connector is complex and not convenient for assembly. Summary of the Invention

[0003] The technical problem to be solved by the present application is to provide a wire-to-board connector with a simple structure and convenient assembly.

[0004] To solve the above technical problem, the present application provides an electrical connector for connecting a cable to a circuit board, which is characterized in that: it includes a base provided with an upward-opening receiving groove, a plurality of terminal modules stacked in parallel and inserted downward into the receiving groove, and a fixed connection piece for fixing the plurality of terminal modules. Each of the terminal modules is connected with a plurality of cables. The terminal module includes a plurality of conductive terminals welded to the cables, an insulator coated outside the plurality of conductive terminals, and a conductive carrier sheet provided with a plurality of grooves for receiving the insulator. Each of the conductive terminals is provided with a terminal pin extending downward from the insulator, and the terminal pin is used for connecting to the circuit board. Each terminal module is assembled together by the base and the fixed connection piece, with a simple structure, convenient assembly, and low production cost.

[0005] As a further design, the conductive carrier sheet is a metal die casting. This can improve the strength of the terminal module and at the same time achieve shielding and prevention of crosstalk interference.

[0006] As a further design, the conductive carrier sheet is provided with an upward-opening fixing groove, the fixed connection piece is a metal piece, and has a connection body extending perpendicular to the terminal module and a fixing leg extending downward from the connection body for inserting into the fixing groove.

[0007] As a further design, each cable includes two signal conductors and two ground conductors extending from one end of the cable. The corresponding conductive terminals connecting the cable include two ground terminals connecting the two ground conductors and two signal terminals connecting the two signal conductors. All the conductive terminals of each terminal module are arranged in a horizontal direction. The four conductive terminals connected to the same cable are arranged adjacent to each other, and the two signal terminals are in the middle position, and the two ground terminals are at both ends.

[0008] As a further design, the insulator includes a first formed part and a second formed part. The first formed part is a plastic formed by insert molding to wrap each conductive terminal. Each conductive terminal includes an intermediate part wrapped in the first formed part and a cable welding part extending upward from the first formed part. The second formed part is a plastic formed by insert molding, that is, after the first formed component formed by fixing the first formed part and welding the conductive terminals to the cables is placed in the conductive carrier, it is integrally formed in the groove of the conductive carrier.

[0009] As a further design, the adjacent grounding terminals of two adjacent cables are connected into one body. A guiding hole is arranged between the two grounded terminals connected into one body. The conductive carrier is provided with a guiding post inserted into the guiding hole. When the terminal assembly fixed in the first formed part is installed in the metal carrier, the guiding hole and the guiding post are in guiding cooperation.

[0010] As a further design, the grounded terminal connected into one body is provided with a connection hole near the terminal pin and the cable welding part. The conductive carrier is provided with a connection post at a position corresponding to the connection hole. The connection hole and the connection post are in interference fit to achieve stable grounding. The height of the guiding post exceeds that of the connection post to play a better guiding role. At the same time, the guiding post is a rectangle elongated in the up and down direction to better prevent crosstalk between signals of adjacent cables.

[0011] As a further design, the conductive carrier includes a positioning block on the upper side of the first formed part. The positioning block cooperates with the first formed part during the process of placing the first formed component into the conductive carrier to play a positioning role.

[0012] As a further design, the first formed part is provided with an avoidance hole, which avoids the guiding post and the connection post and facilitates the jig to press near the guiding post and the connection post.

[0013] As a further design, it further includes a shielding sheet. The shielding sheet is arranged on one side of the opening of the groove of the conductive carrier. The shielding sheet is provided with a convex shell protruding toward the avoidance hole at a position corresponding to the avoidance hole. The convex shell is provided with a receiving hole at a position corresponding to the guiding post. The receiving hole and the guiding post are in interference fit, and convex points are arranged on the side wall of the receiving hole, and the convex points enhance the interference fit between the receiving hole and the guiding post. Description of the Drawings

[0014] Figure 1 is a perspective view of the electrical connector according to the embodiment of the present application.

[0015] Figure 2 is Figure 1 a schematic diagram of the electrical connector base in

[0016] Figure 3 is Figure 1 an exploded view of the electrical connector shown in

[0017] Figure 4 is Figure 3 an exploded view from another perspective shown in

[0018] Figure 5 is Figure 3 and Figure 4 an exploded schematic diagram of the terminal die shown in (for clear display, the first forming part and the second forming part are shown as non-separate parts, but actually the first forming part and the second forming part do not separately form parts)

[0019] Figure 6 is Figure 5 a three-dimensional view of the conductive carrier sheet in

[0020] Figure 7 is Figure 4 a three-dimensional view of the conductive terminal and the cable in

[0021] Figure 8 is Figure 7 a three-dimensional view of the first forming assembly after the first forming of the conductive terminal and the cable in

[0022] Figure 9 is Figure 8 a three-dimensional view after the first forming assembly is placed at the predetermined position of the conductive carrier sheet shown in Figure 6

[0023] Figure 10 is Figure 9 a three-dimensional view of the terminal die after the second forming part is formed in

[0024] Figure 11 is Figure 1 a partial cross-sectional view in the A - A direction in

[0025] Figure 12 is Figure 10 a cross-sectional view in the B - B direction in Detailed Description of the Invention

[0026] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices consistent with some aspects of the present application as detailed in the appended claims.

[0027] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings as understood by those of ordinary skill in the art to which this invention pertains. The terms "first", "second" and similar terms used in the specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "an" do not denote a limitation of quantity, but mean that there is at least one. "Plurality" or "several" means two or more. Unless otherwise indicated, the terms such as "front part", "rear part", "lower part" and / or "upper part" are for convenience of description only and are not limited to a position or a spatial orientation. The terms such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. The singular forms "a", "the" and "said" used in the specification and appended claims of this application are also intended to include the plural forms unless the context clearly dictates 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.

[0028] See Figures 1 to 12 , as shown is an electrical connector 100 in line with this application, for connecting a cable 101 to a circuit board (not shown). The electrical connector 100 includes a base 10 provided with an upwardly open receiving groove, a plurality of terminal modules 20 stacked in parallel and inserted downwardly into the receiving groove, and a fixed connection piece 30 for fixing the upper ends of the plurality of terminal modules 20. A plurality of cables 101 are connected to the upper ends of each of the terminal modules 20. The terminal module 20 includes a plurality of conductive terminals 22 welded to the cable 101, an insulator 24 covering the plurality of conductive terminals 22, and a conductive carrier 28 provided with a plurality of grooves 280 for receiving the insulator 24. Each of the conductive terminals 22 is provided with a terminal pin 252 extending downwardly out of the insulator 24, and the terminal pin 252 is connected to the circuit board.

[0029] As Figure 6 shown, the conductive carrier 28 is a metal die casting, and fixing grooves 283 opening upward are provided at both ends thereof. The fixed connection piece 30 is a metal piece formed by blanking a metal plate. The fixed connection piece 30 has a connecting body 32 extending in the extension direction of the terminal module 20 and a fixing leg 34 extending downward from the connecting body 32 for inserting into the fixing groove 283.

[0030] As Figure 7 shown, each of the cables 101 includes two signal conductors 104, 106 and two ground conductors 102, 108 extending from one end of the cable. The signal conductors 104, 106 are used to transmit differential signals. The corresponding conductive terminals 22 connecting the cable 101 include 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 arranged in a horizontal direction. The four conductive terminals 22 connecting the same cable 101 are arranged adjacent to each other, and the two signal terminals 224, 226 are in the middle position, and the two ground terminals 222, 228 are at both ends.

[0031] Figure 5 The insulator 24 shown in includes a first molded part 242 and a second molded part 246, and is actually formed by two overmolding processes. The specific molding method is as Figures 6 to 10 shown. First, provide the molded conductive carrier 28, conductive terminals 22 and cable 101, and weld the cable 101 to the conductive terminals 22. Then, the conductive terminals 22 and the 101 cable are overmolded to form the first molded part 242, so that the first molded part 242 covers the middle part 254 of each conductive terminal 22, forming the first molded assembly as Figure 8 shown. Each conductive terminal 22 includes a cable welding part 256 extending upward from the first molded part 242. Again, as Figure 9 shown, place the Figure 8 first molded assembly shown in into the groove 280 of the conductive carrier 20, and overmold to form the second molded part 246. The second molded part 246 wraps the cable welding part 256 of the conductive terminal 22 and the two signal conductors 104, 106 and the two ground conductors 102, 108 extending from one end of the cable 101, playing a role in protecting the solder joints. As another alternative implementation, the conductive terminal 22 can also be overmolded with the first molded part 242 first, and then the cable 101 is welded to form the first molded assembly.

[0032] The adjacent ground terminals 228 connecting two adjacent cables 101 are connected together. A guide hole 253 is provided in the middle of the connected ground terminals 228. The conductive carrier 280 is provided with a guide post 282 inserted into the guide hole 253. When the first molded assembly is installed into the metal carrier 28, the guide hole 253 and the guide post 282 are in guiding cooperation.

[0033] The integrally connected grounding terminal 228 is provided with two connection holes 255 near the terminal pin 252 and the cable welding part 256. The conductive carrier sheet 28 is provided with connection posts 284 at positions corresponding to the two connection holes 255. The connection holes 255 and the connection posts 284 are in interference fit to achieve stable grounding. The height of the guiding posts 282 exceeds that of the connection posts 284 to play a better guiding role. At the same time, the guiding posts 282 are rectangular in shape with a long side in the up and down direction to better prevent crosstalk between adjacent differential signals.

[0034] The conductive carrier sheet 28 is further provided with a positioning block 286 on the upper side of the first forming part 242. The positioning block 286 cooperates with the first forming part 242 during the process of placing the first forming assembly into the conductive carrier sheet 28 to play a positioning role. The first forming part 242 is provided with a relief hole 244. The relief hole 244 avoids the guiding posts 282 and the connection posts 284 and facilitates the jig to press near the guiding posts 282 and the connection posts 284, thereby preventing deformation caused by excessive interference force.

[0035] The second forming part 246 includes a welding protection part 243. The welding protection part 243 covers the cable welding part 256 of one cable 101 corresponding to four conductive terminals 222, 224, 226, and 228. The second forming part 246 further includes a connecting part 247 that laterally connects the welding protection parts 243 and a cable protection part 245 that extends upward from the welding protection parts 243 respectively.

[0036] As Figure 5 、 Figure 6 and Figure 10 shown, the groove 280 of the conductive carrier sheet 28 is opened forward. When the terminal dies 20 are stacked and combined together, the front side of the differential signal of the rear terminal die 20 is shielded and isolated by the conductive carrier sheet 28 of the front terminal die 20, but there is no conductive carrier sheet 28 on the front side of the foremost terminal die 20. Therefore, the electrical connector 100 is also designed with a shielding sheet 40 formed by blanking a metal plate. The shielding sheet 40 is arranged on the front side of the foremost terminal die 20. As Figure 4 and Figure 11 shown, the shielding sheet 40 is provided with a convex shell 44 protruding toward the relief hole 244 at the position corresponding to the relief hole 246 of the terminal die 20. The convex shell 44 is provided with a receiving hole 440 at the position corresponding to the guiding post 282. The guiding post 282 is inserted into the receiving hole 440 for interference fit. The side wall of the receiving hole 440 is provided with convex points 442, and the convex points 442 enhance the interference fit between the receiving hole and the guiding post. As Figure 4 、 Figure 10 and Figure 12As shown, a fixing tab 402 is formed by bending the upper side of the shielding piece 40 towards the terminal die piece 20. A relief hole 248 is provided at a corresponding position on the second forming portion 246, and an interference hole 289 is provided at a corresponding position on the conductive carrier 28. The fixing tab 402 passes through the relief hole 248 and is inserted into the interference hole 289. The shielding piece 40 is fixed to the terminal die piece 20 through the interference fit between the fixing tab 402 and the interference hole 289, as well as the interference between the convex shell 44 and the guide post 282.

[0037] Referring to Figure 7 , the terminal pin 252 of each conductive terminal 22 is a fisheye hole structure. After the electrical connector 100 is installed on the circuit board, the terminal pin 252 is in interference fit with the conductive through hole of the circuit board, thereby realizing electrical connection. To achieve stable electrical connection, certain requirements for the interference amount and insertion and extraction force are imposed on both the terminal pin 252 and the conductive through hole. Since there are a large number of terminal pins, a great deal of force is required for both the installation and removal of the electrical connector from the circuit board. In the prior art patents of Xuntao, the protruding block acting on the disassembly and assembly fixture is separately designed as two parts from the terminal die piece, and there is a risk of separation of the two parts during the removal process. Therefore, in this application, please refer to Figure 3 , Figure 6 and Figure 12 , protruding blocks 288 are provided at both horizontal ends of each conductive carrier 28. There is a gap between the lower side of the protruding block 288 and the aforementioned circuit board. When the electrical connector 100 is removed from the aforementioned circuit board, a disassembly fixture (not shown) can extend into the aforementioned gap for disassembly operations. Of course, during the installation process, the protruding block 288 can also be pressed to press the terminal pin 252 of the electrical connector 100 into the circuit board.

[0038] Please refer to Figure 2 and Figure 12 , the base 10 is provided with a horizontal bottom wall 14 and two side walls 12 extending perpendicular to the bottom wall 14. Guide grooves 122 are provided on the two side walls 12, and guide ribs 290 are provided on the metal carrier 28. When the terminal die piece 20 is inserted into the base 10, the guide ribs 290 cooperate with the guide grooves 122 to limit the terminal die piece 20 to be inserted into a predetermined position. The guide ribs 290 are provided with wedge-shaped locking blocks 292, and the base 10 is provided with locking holes 120 on the bottom wall of the guide grooves 122. When the terminal die piece 20 is inserted into the base 10, the wedge-shaped locking blocks 292 first expand the two side walls 12, and after the terminal die piece 20 is inserted into the base 10, the wedge-shaped locking blocks 292 slide into the locking holes 120 to achieve a locking fit. The bottom wall 14 has a bottom hole 140, and the terminal pins 252 of the signal terminals 224, 226 pass through the bottom hole 140 and do not contact the base 10.

[0039] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments of equivalent changes within the scope of the technical solution of the present invention by using the technical content disclosed above. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An electrical connector for connecting a cable to a circuit board, characterized in that: It includes a base provided with an upward-opening receiving groove, a plurality of terminal modules stacked in parallel and inserted downward into the receiving groove, and a fixed connection piece for fixing the plurality of terminal modules. Each of the terminal modules is connected with a plurality of cables. The terminal module includes a plurality of conductive terminals welded to the cable, an insulator coated outside the plurality of conductive terminals, and a conductive carrier sheet provided with a plurality of grooves for receiving the insulator. Each of the conductive terminals is provided with a terminal pin extending downward from the insulator, and the terminal pin is used to connect to the circuit board; The conductive terminals include a plurality of ground terminals and a plurality of signal terminals. All the conductive terminals of each terminal module are arranged in a horizontal direction, and two ground terminals are provided on both sides of any two signal terminals; The insulator includes a first formed part, and the first formed part is a plastic embedded and formed to coat each conductive terminal. Each of the conductive terminals includes an intermediate part coated in the first formed part; The ground terminals between two pairs of adjacent signal terminal pairs are connected into one body. A guiding hole is provided in the middle of the two connected ground terminals. The conductive carrier sheet is provided with a guiding post inserted into the guiding hole. When the terminal assembly fixed in the first formed part is installed into the conductive carrier sheet, the guiding hole and the guiding post are in guiding cooperation; The guiding post is a rectangle elongated in the up and down direction to better prevent crosstalk between adjacent signal terminal pairs.

2. The electrical connector according to claim 1, characterized in that: The conductive carrier sheet is a metal die casting.

3. The electrical connector according to claim 2, characterized in that: The conductive carrier sheet is provided with an upward-opening fixing groove. The fixed connection piece is a metal part and has a connection body extending perpendicular to the terminal module and a fixing foot extending downward from the connection body for inserting into the fixing groove.

4. The electrical connector according to claim 3, characterized in that: Each of the cables includes two signal conductors and two ground conductors extending from one end of the cable. The corresponding conductive terminals connecting the cable include two ground terminals connecting the two ground conductors and two signal terminals connecting the two signal conductors.

5. The electrical connector according to claim 4, characterized in that: The insulator further includes a second formed part. Each of the conductive terminals further includes a cable welding part extending upward from the first formed part. The second formed part is a plastic formed by embedded molding, that is, after the first formed component formed by fixing the first formed part and welding the cable to the conductive terminal is placed into the conductive carrier sheet, it is integrally formed in the groove of the conductive carrier sheet.

6. The electrical connector according to claim 1, characterized in that: The connected ground terminals are provided with connection holes near the terminal pins and the cable welding parts. The conductive carrier sheet is provided with connection posts at positions corresponding to the connection holes. The connection holes and the connection posts are in interference fit to achieve stable grounding, and the height of the guiding post exceeds that of the connection post to play a better guiding role.

7. The electrical connector according to claim 6, wherein: The conductive carrier includes a positioning block on the upper side of the first forming portion. The positioning block cooperates with the first forming portion during the process of placing the conductive carrier into the first forming assembly to play a positioning role.

8. The electrical connector according to claim 7, wherein: The first forming portion is provided with an avoidance hole, and the avoidance hole avoids the guide post and the connection post and facilitates the jig to press near the guide post and the connection post.

9. The electrical connector according to claim 8, wherein: It further includes a shielding sheet. The shielding sheet is arranged on one side of the opening of the groove of the conductive carrier. The shielding sheet is provided with a convex shell protruding toward the avoidance hole at the position corresponding to the avoidance hole. The convex shell is provided with a receiving hole at the position corresponding to the guide post. The receiving hole is in interference fit with the guide post, and convex points are arranged on the side wall of the receiving hole, and the convex points enhance the interference fit between the receiving hole and the guide post.

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