Electric connector and electric connector combination

Abstract

The utility model discloses an electric connector and an electric connector combination, the electric connector combination comprises an electric connector and a butt joint connector which are mutually plugged, the electric connector is welded on a circuit board, the electric connector comprises an insulation shell and a conductive terminal group arranged in the insulation shell, the conductive terminal group is provided with a plurality of contact parts and a plurality of welding parts, and the butt joint connector is connected with the insulation shell. The butt joint part and the balance weight part are integrally formed on the insulation shell in an injection molding mode, the butt joint part forwards extends out of the circuit board, the balance weight part formed in an injection molding mode is arranged on the circuit board to balance weight, the technology is simple, the manufacturing cost is low, the multiple contact parts are located in the butt joint part, the hollowed-out part is arranged between the butt joint part and the balance weight part, and therefore the butt joint part and the balance weight part are fully separated. Therefore, the injection molding quality of the butt joint part is ensured, shrinkage and displacement of the plurality of contact parts in the butt joint part due to injection molding of the counterweight part are avoided, and the yield of the electric connector and the electric connector combination is ensured.

Description

[Technical field]

[0001] The utility model relates to an electric connector and an electric connector combination, in particular to an electric connector and an electric connector combination installed on a circuit board. [Background technology]

[0002] An existing electrical connection combination includes an electrical connector and a docking connector. The electrical connector is installed on a circuit board and includes an insulating shell and a plurality of terminals arranged on the insulating shell. The insulating shell is integrally formed with a docking portion located in the front and a mounting portion located in the rear. The docking portion is cantilevered from the front edge of the circuit board, and the mounting portion is placed on the circuit board. Multiple contact portions of the terminal are located in the docking portion of the insulating shell for electrical connection with a docking connector, and multiple welding portions of the terminal extend out of the bottom of the mounting portion and are welded to the circuit board.

[0003] Due to the cantilevered arrangement of the docking portion, in order to prevent the docking portion from drooping and causing the rear end mounting portion to tilt and affect the terminal welding, the existing electrical connector is equipped with a metal counterweight block in the mounting portion to adjust the center of gravity, which increases the number of components and increases the manufacturing cost. It also increases the number of assembly steps and makes the assembly process complicated. In addition, if the local thickness is large when molding the insulating shell, it is easy to shrink and deform, thereby affecting the yield rate.

[0004] Therefore, it is necessary to design an improved electrical connector and an electrical connector combination to solve the above technical problems. [Contents of the utility model]

[0005] In view of the problems of the background technology, the purpose of the utility model is to provide an insulating shell that is integrally injection molded with a docking part and a counterweight part, the counterweight part formed by injection molding is used to balance the weight, and a hollow part is provided between the docking part and the counterweight part to separate the docking part and the counterweight part front and back to prevent deformation, and the manufacturing process is simple and the yield rate of the electrical connector and electrical connector combination is high.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an electrical connector for welding to a circuit board, comprising an insulating shell and a conductive terminal group arranged in the insulating shell, the conductive terminal group having multiple contact portions and multiple welding portions, the insulating shell is integrally injection molded with a docking portion and a counterweight portion, a hollow portion is provided between the docking portion and the counterweight portion along the front-to-back direction, the hollow portion penetrates the top and bottom surfaces of the insulating shell along the up-down direction, the docking portion extends forward from the circuit board, multiple contact portions are located in the docking portion for electrically connecting to a docking connector, multiple welding portions extend out of the docking portion and are welded to the circuit board, and the counterweight portion is placed on the circuit board.

[0007] Furthermore, the maximum thickness of the solid portion of the counterweight portion extending in the front-to-back direction is greater than the length of the front ends of the plurality of contact portions extending forward beyond the front edge of the circuit board.

[0008] Furthermore, the plurality of welding portions are arranged in the left-right direction and welded to the surface of the circuit board, the hollow portion further extends in the left-right direction close to the left and right sides of the insulating shell, the plurality of welding portions are exposed in the hollow portion, and the length of the hollow portion extending in the left-right direction is greater than the distance between the plurality of welding portions arranged in the left-right direction.

[0009] Furthermore, a plurality of glue reducing grooves are recessed upward from the bottom surface of the counterweight portion, and the plurality of glue reducing grooves are arranged in at least one row at equal intervals along the left-right direction.

[0010] Furthermore, two fixing parts are respectively provided on the left and right sides of the counterweight part, each of the fixing parts has a plurality of fixing feet welded to the plurality of fixing holes of the circuit board, and the plurality of fixing feet are lower than the plurality of welding parts in the up and down directions. The two fixing parts extend forward to the left and right outer sides of the hollow part, and at least two of the fixing feet are located on the left and right outer sides of the hollow part.

[0011] Furthermore, it also includes an insulating part and a metal shell, the conductive terminal group is fixed to the insulating part, the metal shell cover is arranged on the outside of the conductive terminal group, the metal shell includes a docking body and an extension part extending backward from the top wall of the docking body, the docking body has an insertion cavity, and multiple contact parts are exposed in the insertion cavity. The insulating shell is injection molded on the outside of the metal shell, and the docking body is accommodated in the docking part. The tail of the extension part in the front-to-back direction is further back than the multiple welding parts, the extension part passes through the hollow part in the front-to-back direction and the tail of the extension part is embedded in the counterweight part.

[0012] The utility model also adopts the following technical scheme: an electrical connector for welding to a circuit board, comprising a conductive terminal group; a metal shell, which is covered on the outside of the conductive terminal group, the metal shell comprising a docking body and an extension portion extending backward from the docking body, the conductive terminal group having multiple welding portions welded to the circuit board; an insulating shell, the insulating shell covers the outer periphery of the metal shell and is placed on the circuit board, the insulating shell is integrally injection molded with a docking portion and a counterweight portion, a hollow portion is provided between the docking portion and the counterweight portion along the front-to-back direction, the hollow portion penetrates the top and bottom surfaces of the insulating shell along the up-down direction, the hollow portion partially separates the docking portion and the counterweight portion along the front-to-back direction, the docking portion extends forward from the circuit board, the docking body is covered by the docking portion, the extension portion is exposed in the hollow portion, and the counterweight portion is placed on the circuit board.

[0013] Furthermore, the tail of the extension portion is located further back than the plurality of welding portions along the front-rear direction, and the tail of the extension portion is embedded in the counterweight portion.

[0014] Furthermore, a plurality of glue reducing grooves are recessed upward from the bottom surface of the counterweight portion, and the tail of the extension portion along the front-to-back direction is located between the hollowed-out portion and the glue reducing grooves.

[0015] The utility model also adopts the following technical solution: an electrical connector assembly includes an electrical connector, including an insulating shell, a metal shell housed in the insulating shell and a conductive terminal group, a plug-in cavity is recessed in the front of the metal shell, the conductive terminal group has a plurality of contact parts and a plurality of welding parts, a plurality of the contact parts are exposed in the plug-in cavity, a plurality of the welding parts are used to be welded to a circuit board, the insulating shell is integrally injection molded with a docking part and a counterweight part, a hollow part is provided between the docking part and the counterweight part along the front and rear directions, the hollow part makes the docking part and the counterweight part The two parts are partially spaced apart along the front-to-back direction, the docking part extends forward from the circuit board and has a docking space, the front part of the metal shell is located in the docking space, the rear part of the metal shell is at least partially located in the hollowed-out part, and the counterweight part is placed above the circuit board; a docking connector is used to connect with the electrical connector, the docking connector includes a plug-in shell and an electrical module arranged in the plug-in shell, the plug-in shell is plugged into the docking space along the front-to-back direction, one end of the electrical module is docked with the front part of the metal shell and is electrically connected to the conductive terminal group.

[0016] Furthermore, the plurality of welding portions are arranged in the left-right direction and welded to the surface of the circuit board, the hollow portion penetrates the top and bottom surfaces of the insulating shell in the up-down direction, the hollow portion further extends in the left-right direction close to the left and right sides of the insulating shell, the plurality of welding portions are located in the hollow portion, and the length of the hollow portion extending in the left-right direction is greater than the distance between the plurality of welding portions arranged in the left-right direction.

[0017] Furthermore, the metal shell has a docking body and an extension portion extending backward from the top wall of the docking body, the extension portion passes through the hollow portion in the front-to-back direction, the tail of the extension portion is further back than the multiple welding portions, and the tail of the extension portion extends into the counterweight portion.

[0018] Furthermore, a plurality of glue reducing grooves are recessed upward from the bottom surface of the counterweight portion, and the tail of the extension portion along the front-to-back direction is located between the hollowed-out portion and the glue reducing grooves.

[0019] Furthermore, the docking portion is recessed from front to rear into the docking space, and the docking space is divided into an upper part and a lower part by the docking body along the height direction, the rear wall surface of the lower part of the docking space is located in front of the circuit board, and the rear wall surface of the upper part of the docking space is further back than the rear wall surface of the lower part of the docking space, and the plug-in shell is divided into an upper part and a lower part by the electrical module along the height direction, and the front end surface of the upper part of the plug-in shell is further back than the front end surface of the lower part of the plug-in shell, and the upper and lower parts of the plug-in shell are respectively plugged into the upper and lower parts of the docking space, and the upper part of the plug-in shell partially overlaps with the circuit board along the up and down directions.

[0020] Furthermore, a barrel portion is protruded in the docking space, the front portion of the metal shell is accommodated in the barrel portion, a first waterproof component is provided between the plug-in shell and the barrel portion, the first waterproof component abuts against the outer circumferential surface of the barrel portion and the inner surface of the plug-in shell, the other end of the electrical module is electrically connected to a cable assembly, the cable assembly extends out of the plug-in shell, a second waterproof component is provided on the outer periphery of the cable assembly, a third waterproof component is provided on the outer periphery of the plug-in shell, and an insulating covering component is molded on the outer periphery of the cable assembly and the plug-in shell and covers the second waterproof component and the third waterproof component.

[0021] Compared with the prior art, the utility model has the following beneficial effects: the insulating shell is integrally injection molded and provided with the docking portion and the counterweight portion, and the counterweight portion is placed on the circuit board to adjust the center of gravity of the electrical connector to be located on the circuit board, thereby preventing the docking portion from bowing downward when not welded, which is conducive to good automatic welding of multiple welding portions and the circuit board, and the counterweight portion formed by injection molding is used to balance the weight, without the need to assemble other counterweight parts, thereby saving manufacturing costs and simplifying assembly steps, and the hollow portion is provided between the docking portion and the counterweight portion in the front-to-back direction, and the hollow portion passes through the top and bottom surfaces of the insulating shell in the up-down direction, so that the docking portion and the counterweight portion are fully spaced apart in the front-to-back direction, effectively reducing the influence of the plastic shrinkage of the counterweight portion on the docking portion, ensuring the molding quality of the docking portion after injection molding, thereby avoiding the displacement of the multiple contact portions located in the docking portion due to the shrinkage of the counterweight portion after injection molding, and ensuring the yield rate of the electrical connector.

Brief Description of the Drawings

[0022] Figure 1 It is a three-dimensional assembly diagram of the electrical connector assembly of the utility model;

[0023] Figure 2 It is a three-dimensional exploded view of the butt connector in the electrical connector assembly of the utility model;

[0024] Figure 3 It is a three-dimensional exploded view of the electrical connector of the utility model;

[0025] Figure 4 It is a three-dimensional combined diagram of the electrical connector of the utility model from another viewing angle;

[0026] Figure 5 It is a top view of the electrical connector of the utility model;

[0027] Figure 6 for Figure 5 Schematic cross-sectional view along the AA direction;

[0028] Figure 7 for Figure 5 Schematic cross-sectional view along direction BB;

[0029] Figure 8 It is a cross-sectional schematic diagram of the electrical connector of the utility model cut along a plane formed by the front-to-back direction and the left-to-right direction;

[0030] Fig. 9 It is a cross-sectional schematic diagram of the utility model electrical connector assembly when plugged in.

[0031] Description of the accompanying drawings for the specific implementation:

[0032] Electrical connector 100 Insulation housing 1 Docking part 11 Docking Space 111 Cylinder 1111 Buckle portion 112 Counterweight 12 Glue reduction tank 121 Hollowing out 13 Conductive terminal set 2 Contact Department 21 Welding part 22 Insulation P Metal shell 3 Docking body 31 Insertion cavity 311 Extension 32 Tail 321 Fixing 4 Fixed foot 41 Circuit board 200 Fixing hole 201 Docking Connector 300 Plug housing 5 Slot 51 Locking part 52 Electrical module 6 Cable assembly7 First waterproof part 81 Second waterproof part 82 The third waterproof part 83 Insulation covering 9 [Specific implementation method]

[0033] In order to facilitate a better understanding of the purpose, structure, features and functions of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods.

[0034] like Figures 1 to 9The electrical connector assembly provided by the utility model is shown, and the electrical connector assembly includes an electrical connector 100 and a docking connector 300. The electrical connector 100 is installed on a circuit board 200, and the electrical connector 100 is plugged with the docking connector 300 along the front-to-back direction. The electrical connector 100 includes an insulating shell 1, a conductive terminal group 2 and a metal shell 3 arranged in the insulating shell 1. The metal shell 3 is located in the insulating shell 1 and is covered on the outside of the conductive terminal group 2. The insulating shell 1 is covered on the outer periphery of the metal shell 3 and is integrally injection-molded with a docking portion 11 and a counterweight portion 12 and a hollow portion 13 located between the docking portion 11 and the counterweight portion 12. The docking portion 11 extends forward from the circuit board 200, and the multiple contact portions 21 of the conductive terminal group 2 are located in a docking body 31 at the front of the metal shell 3. The docking body 31 is located in the docking portion 11. The soldering portion 22 is exposed in the hollow portion 13 and soldered to the circuit board 200. An extension portion 32 at the rear of the metal shell 3 passes through the hollow portion 13 and is embedded in the counterweight portion 12. Two fixing members 4 are provided on the left and right sides of the counterweight portion 12 to be fixed to the circuit board 200. The docking connector 300 includes a plug-in shell 5 and an electrical module 6 provided in the plug-in shell 5. The plug-in shell 5 is plugged into the docking portion 11. The inner surface of the plug-in shell 5 is provided with A first waterproof component 81, one end of the electrical module 6 is electrically connected to the conductive terminal group 2, the other end of the electrical module 6 is electrically connected to the cable assembly 7, the cable assembly 7 extends out of the plug-in shell 5, a second waterproof component 82 is arranged on the periphery of the cable assembly 7, a third waterproof component 83 is arranged on the periphery of the plug-in shell 5, and an insulating covering component 9 covers the periphery of the cable assembly 7 and the plug-in shell 5 and covers the second waterproof component 82 and the third waterproof component 83.

[0035] like Figure 3 and Figure 6As shown, the conductive terminal group 2 is fixed to an insulating member P, a plurality of contact portions 21 are exposed at the front end of the insulating member P, a plurality of welding portions 22 extend out of the bottom of the insulating member P and are welded to the surface of the circuit board 200, the metal shell 3 is covered on the outside of the insulating member P to cover the outside of the conductive terminal group 2, the front and rear portions of the metal shell 3 are the docking body 31 and the extension portion 32 respectively, the walls of the docking body 31 are arranged to form a plug-in cavity 311, the front end of the insulating member P is accommodated in the plug-in cavity 311 so that a plurality of contact portions 21 are exposed in the plug-in cavity 311, the extension portion 32 is extended backward from a top wall of the docking body 31 to form a tail portion 231, and the tail portion 321 of the extension portion 32 is further back than the plurality of welding portions 22. In this embodiment, the metal shell 3 is composed of a metal inner shell and a metal outer shell. In other embodiments, only one metal shell 3 may be provided. In this embodiment, the conductive terminal group 2 is first fixed to the insulating part P, and the metal shell 3 is then covered on the outside of the insulating part P and fixed to the insulating shell 1. However, in other embodiments, the conductive terminal group 2 may also be directly provided in the insulating shell 1.

[0036] like Figure 1 and Fig. 9 As shown, the insulating shell 1 covers the outer periphery of the metal shell 3, that is, the insulating shell 1 is directly injection molded on the outer periphery of the metal shell 3 so that the insulating shell 1 and the metal shell 3 are formed as one body, and the docking portion 11 of the insulating shell 1 is recessed from front to back with a docking space 111, and the docking space 111 is used for the insertion of the plug-in shell 5, and the top of the docking portion 11 is provided with a buckle portion 112 that can be buckled with a lock buckle portion 52 at the top of the plug-in shell 5, and as shown Figure 6 As shown, a barrel portion 1111 is protruded forward from the rear wall surface of the docking space 111, and the barrel portion 1111 is further overmolded on the outer side of the docking body 31. The docking space 111 is divided into an upper part and a lower part by the barrel portion 1111 (or the docking body 31) in the up-down direction. The upper part of the docking space 111 and the lower part of the docking space 111 are recessed at different depths in the front-to-back direction. Specifically, the rear wall surface of the lower part of the docking space 111 is located in front of the front edge of the circuit board 200, and the rear wall surface of the upper part of the docking space 111 is arranged further back than the rear wall surface of the lower part of the docking space 111, so that the recessed depth of the upper part of the docking space 111 is deeper. A part of the upper part of the docking space 111 is located above the circuit board 200. Fig. 9When the electrical connector 100 is plugged into the docking connector 300, the upper and lower parts of the plug-in shell 5 are respectively plugged into the upper and lower parts of the docking space 111, so that a corresponding part of the upper part of the plug-in shell 5 is located above the circuit board 200 and overlaps with the circuit board 200. This is beneficial for moving the center of gravity backward to approach the rear side of the circuit board 200 after the electrical connector 100 and the docking connector 300 are plugged in, avoiding excessive force on the overhanging docking part 11, and at the same time playing an anti-misplugging role to prevent the plug-in shell 5 from being inserted into the docking space 111 upside down.

[0037] like Figure 3 and Figure 6 As shown, the hollow portion 13 penetrates the top and bottom surfaces of the insulating housing 1 in the up-down direction, so that the docking portion 11 and the counterweight portion 12 are sufficiently spaced apart in the front-to-back direction, effectively reducing the impact of the plastic shrinkage of the counterweight portion 12 on the docking portion 11, ensuring the molding quality of the docking portion 11 after injection molding, thereby avoiding the displacement of the multiple contact portions 21 and the docking body 31 located in the docking portion 11 due to the injection molding of the counterweight portion 12, ensuring the yield rate of the electrical connector 100, and as shown Figure 4 and Figure 5 As shown, the plurality of welding portions 22 are arranged in the left-right direction and exposed in the hollow portion 13, and the hollow portion 13 further extends in the left-right direction close to the left and right sides of the insulating shell 1, and the length of the hollow portion 13 extending in the left-right direction is greater than the distance between the plurality of welding portions 22 arranged in the left-right direction, thereby preventing the plurality of welding portions 22 from being deformed by the pulling force of the plastic before and after shrinkage, and ensuring that the plurality of welding portions 22 are located in the same plane, thereby facilitating good automated welding of the plurality of welding portions 22 and the circuit board 200.

[0038] like Figures 4 to 8As shown, the counterweight portion 12 is located behind the plurality of soldering portions 22 and is placed on the circuit board 200. The counterweight portion 12 has a solid portion made of plastic and a hollow portion made of a plurality of glue reduction grooves 121. The maximum thickness of the solid portion of the counterweight portion 12 along the front-to-back direction is greater than the distance that the plurality of contact portions 21 extend forward beyond the front edge of the circuit board 200. The thickness of the solid portion of the counterweight portion 12 is related to the weight of the counterweight portion 12. When the thickness of the solid portion of the counterweight portion 12 is large, it is beneficial to The center of gravity is close to the rear side where the circuit board 200 is located, and on the basis that the solid part of the counterweight part 12 has satisfied the need to place the center of gravity of the electrical connector 100 on the side of the circuit board 200, a plurality of the glue reduction grooves 121 are recessed upward from the bottom surface of the counterweight part 12, so that the amount of plastic used in the counterweight part 12 as a whole is reduced, effectively preventing the counterweight part 12 from being deformed as a whole during molding, and the plurality of the glue reduction grooves 121 are arranged equidistantly in the left and right directions and formed into two rows in the front and rear, which is beneficial to the various parts of the counterweight part 12. The plastic thickness is relatively uniform, which prevents the local plastic of the counterweight part 12 from being too thick and deformed. The extension part 32 of the metal shell 3 located on the outside passes through the hollow part 13 and the tail 321 of the extension part 32 is embedded in the counterweight part 12 to fix the metal shell 3, so that the front and rear of the metal shell 3 are respectively fixed to the docking part 11 and the counterweight part 12, thereby increasing the bonding strength between the metal shell 3 and the insulating shell 1. The tail 321 of the extension part 32 is located in the front-to-back direction. The hollow portion 13 and the plurality of glue reducing grooves 121 reduce the pulling force of the counterweight portion 12 on the portion of the extension portion 32 located in the hollow portion 13, and the tail portion 321 of the extension portion 32 and the tail end of the counterweight portion 12 are separated by the plurality of glue reducing grooves 121, thereby reducing the pulling force of the counterweight portion 12 on the tail portion 321 of the extension portion 32, preventing the metal shell 3 from deforming, thereby avoiding the displacement of the conductive terminal group 2 inside, and maintaining the yield rate of the electrical connector 100.

[0039] like Figures 3 to 5As shown, two fixing members 4 are respectively provided on the left and right sides of the counterweight portion 12, and two fixing feet 41 are provided at the bottom of each fixing member 4, corresponding to the two fixing holes 201 on the circuit board 200. In the up-down direction, the plurality of fixing feet 41 are lower than the plurality of welding portions 22, so that when the electrical connector 100 is placed on the circuit board 200, the plurality of fixing feet 41 are correspondingly plugged into the plurality of fixing holes 201, which can play a role of pre-installation positioning, and the plurality of fixing feet 41 are welded and fixed to the plurality of fixing holes 201, which further strengthens the bonding strength between the counterweight portion 12 and the circuit board 200 and prevents the docking portion 11 from being damaged. The sagging phenomenon is generated, thereby ensuring that the multiple welding parts 22 maintain a good welding state after welding with the circuit board 200, and the two fixing parts 4 further extend forward to the left and right outer sides of the hollow part 13, thereby strengthening the plastic structure strength on the left and right sides of the hollow part 13 of the insulating shell 1, and two of the fixing feet 41 are located on the left and right outer sides of the hollow part 13, so that the two fixing feet 41 are located on the left and right outer sides of the multiple welding parts 22, shielding the multiple welding parts 22, and at the same time strengthening the fixation of the insulating shell 1 and the circuit board 200, avoiding the displacement of the insulating shell 1 and causing the welding part 22 to be pulled.

[0040] like Figure 1 , Figure 2 and Fig. 9 As shown, the docking connector 300 includes the plug-in housing 5, the plug-in housing 5 has a slot 51 and an installation cavity, one end of the electrical module 6 (i.e., the end close to the electrical connector 100) is located in the slot 51, and the inner surface of the slot 51 is provided with the first waterproof member 81, when the plug-in housing 5 is plugged into the docking space 111, the electrical module 6 is inserted into the plug-in cavity 311 and electrically connected to the conductive terminal group 2, the first waterproof member 81 is sealed against the outer circumferential surface of the barrel 1111 and the inner surface of the slot 51 to improve the sealing and waterproof performance of the docking interface, the electrical The other end of the module 6 (i.e., the end away from the electrical connector 100) is located in the installation cavity and is electrically connected to the cable assembly 7. The cable assembly 7 extends out of the installation cavity, and the second waterproof component 82 is provided on the outer peripheral surface of the cable assembly 7. The outer peripheral surface of the plug-in shell 5 is provided with the third waterproof component 83. The insulating sheath 9 is integrally molded on the outside of the cable assembly 7 and the plug-in shell 5. The insulating sheath 9 fills the installation cavity to fix the cable assembly 7 and the electrical module 6, and can cover the outer peripheral surfaces of the second waterproof component 82 and the third waterproof component 83 to improve the waterproof performance.

[0041] In summary, the electrical connector 100 and the electrical connector combination of the present invention have the following beneficial effects:

[0042] 1. The insulating housing 1 is integrally injection molded with the docking portion 11 and the counterweight portion 12. The counterweight portion 12 is placed on the circuit board 200 to adjust the center of gravity of the electrical connector 100 to be located on the circuit board 200, thereby preventing the docking portion 11 from bowing downward when not welded, which is conducive to good automatic welding of the plurality of welding portions 22 and the circuit board 200. The counterweight portion 12 formed by injection molding is used to balance the weight, and no additional assembly of other counterweight parts is required, thereby saving manufacturing costs and simplifying assembly steps. The hollow portion 13 is provided between the connecting portion 11 and the counterweight portion 12, and the hollow portion 13 penetrates the top and bottom surfaces of the insulating shell 1 in the up-down direction, so that the docking portion 11 and the counterweight portion 12 are sufficiently spaced apart in the front-to-back direction, effectively reducing the influence of the plastic shrinkage of the counterweight portion 12 on the docking portion 11, ensuring the molding quality of the docking portion 11 after injection molding, thereby avoiding the displacement of the multiple contact portions 21 located in the docking portion 11 due to the injection molding shrinkage of the counterweight portion 12, and ensuring the yield rate of the electrical connector 100.

[0043] 2. The maximum thickness of the solid part of the counterweight portion 12 extending in the front-to-back direction is greater than the length of the front ends of the plurality of contact portions 21 extending forward beyond the front edge of the circuit board 200. The weight of the counterweight portion 12 is adjusted by adjusting the maximum thickness of the solid part of the counterweight portion 12 so that the center of gravity of the electrical connector 100 is moved as far back as possible to the side where the circuit board 200 is located.

[0044] 3. The plurality of soldering portions 22 are arranged in the left-right direction and soldered to the surface of the circuit board 200, the hollow portion 13 further extends in the left-right direction close to the left and right sides of the insulating shell 1, the plurality of soldering portions 22 are exposed in the hollow portion 13, and the length of the hollow portion 13 extending in the left-right direction is greater than the distance between the plurality of soldering portions 22 arranged in the left-right direction, so that the plurality of soldering portions 22 are spaced from the counterweight portion 12 front to back, preventing the plurality of soldering portions 22 from being deformed by the shrinkage of the plastic of the counterweight portion 12, and ensuring that the plurality of soldering portions 22 can be located in the same plane and well soldered to the circuit board 200.

[0045] 4. The conductive terminal group is fixed to the insulating part P, the metal shell 3 is fixed to the outside of the insulating part P, the insulating shell 1 is covered on the outside of the metal shell 3, and is fixed to the docking part 11 and the counterweight part 12 respectively through the docking body 31 and the extension part 32. The conductive terminal group 2 is indirectly fixed in the insulating shell 1, so that the multiple contact parts 21 and the multiple welding parts 22 are not directly connected to the plastic of the docking part 11 and the counterweight part 12, thereby reducing the tensile force of the multiple contact parts 21 and the multiple welding parts 22 caused by the deformation of the plastic, ensuring the positive positioning of the contact parts 21 and the multiple welding parts 22, which is conducive to maintaining the yield rate of the electrical connector 100.

[0046] 5. The extension portion 32 passes through the hollow portion 13 and the tail portion 321 of the extension portion 32 is embedded in the counterweight portion 12 to fix the metal shell 3. A plurality of the glue reducing grooves 121 are recessed upward from the bottom surface of the counterweight portion 12. The tail portion 321 of the extension portion 32 is located between the hollow portion 13 and the glue reducing grooves 121 in the front-to-back direction, reducing the pulling force of the counterweight portion 12 on the portion of the extension portion 32 located in the hollow portion 13, and making the tail portion 321 of the extension portion 32 to the tail end of the counterweight portion 12 separated by a plurality of the glue reducing grooves 121, further preventing the plastic of the counterweight portion 12 from being too thick, reducing the pulling force of the counterweight portion 12 on the tail portion 321 of the extension portion 32, and the plurality of the glue reducing grooves 121 are equidistantly arranged in two rows in the left-right direction, so that the thickness of each part of the counterweight portion 12 is uniform, preventing the local plastic of the counterweight portion 12 from being too thick and deforming.

[0047] 6. The rear wall surface of the upper part of the docking space 111 is arranged further back than the rear wall surface of the lower part of the docking space 111. The upper and lower parts of the plug-in shell 5 are respectively plugged into the upper and lower parts of the docking space 111, so that the upper part of the plug-in shell 5 and the upper part of the docking space 111 partially overlap with the circuit board 200 along the up and down direction, which is conducive to setting the center of gravity backward and closer to the side where the circuit board 200 is located, and also can play an anti-misinsertion role, preventing the plug-in shell 5 from being inserted into the docking space 111 upside down.

[0048] The above detailed description is only an explanation of the preferred embodiment of the utility model, and does not limit the patent scope of the utility model. Therefore, all equivalent technical changes made by using the description and illustrations of this creation are included in the patent scope of this creation.

Claims

1. An electrical connector for soldering to a circuit board, characterized in that: include: An insulating shell and a conductive terminal group arranged in the insulating shell, the conductive terminal group has multiple contact parts and multiple welding parts, the insulating shell is integrally injection-molded with a docking part and a counterweight part, a hollow part is provided between the docking part and the counterweight part in the front-to-back direction, the hollow part passes through the top surface and the bottom surface of the insulating shell in the up-down direction, the docking part extends forward from the circuit board, multiple contact parts are located in the docking part for electrical connection with a docking connector, multiple welding parts extend out of the docking part and are welded to the circuit board, and the counterweight part is placed on the circuit board.

2. The electrical connector according to claim 1, characterized in that :The maximum thickness of the solid part of the counterweight portion extending in the front-to-back direction is greater than the length of the front ends of the plurality of contact portions extending forward beyond the front edge of the circuit board.

3. The electrical connector according to claim 1, characterized in that : The plurality of welding parts are arranged in the left-right direction and welded to the surface of the circuit board, the hollow part further extends in the left-right direction close to the left and right sides of the insulating shell, the plurality of welding parts are exposed in the hollow part, and the length of the hollow part extending in the left-right direction is greater than the distance between the plurality of welding parts arranged in the left-right direction.

4. The electrical connector according to claim 1, characterized in that : A plurality of glue reduction grooves are recessed upward from the bottom surface of the counterweight portion, and the plurality of glue reduction grooves are arranged in at least one row at equal distances along the left-right direction.

5. The electrical connector according to claim 1, characterized in that : Two fixing parts are respectively provided on the left and right sides of the counterweight part, each of the fixing parts has multiple fixing feet welded with multiple fixing holes of the circuit board, and the multiple fixing feet are lower than the multiple welding parts in the up and down directions. The two fixing parts extend forward to the left and right outer sides of the hollow part, and at least two of the fixing feet are located on the left and right outer sides of the hollow part.

6. The electrical connector according to claim 1, characterized in that : It also includes an insulating member and a metal shell, the conductive terminal group is fixed to the insulating member, the metal shell cover is arranged on the outside of the conductive terminal group, the metal shell includes a docking body and an extension portion extending backward from the top wall of the docking body, the docking body has an insertion cavity, and multiple contact portions are exposed in the insertion cavity, the insulating shell is injection molded on the outside of the metal shell, the docking body is accommodated in the docking portion, the tail of the extension portion in the front-to-back direction is further back than the multiple welding portions, the extension portion passes through the hollow portion in the front-to-back direction and the tail of the extension portion is embedded in the counterweight portion.

7. An electrical connector for soldering to a circuit board, characterized in that: include: a conductive terminal set; A metal shell is disposed on the outside of the conductive terminal group, the metal shell includes a docking body and an extension portion extending backward from the docking body, and the conductive terminal group has a plurality of welding portions welded to the circuit board; An insulating shell, which covers the outer periphery of the metal shell and is placed on the circuit board. The insulating shell is integrally injection-molded and has a docking portion and a counterweight portion. A hollow portion is provided between the docking portion and the counterweight portion in the front-to-back direction. The hollow portion penetrates the top and bottom surfaces of the insulating shell in the up-down direction. The hollow portion partially separates the docking portion and the counterweight portion in the front-to-back direction. The docking portion extends forward from the circuit board, the docking body is covered by the docking portion, the extension portion is exposed in the hollow portion, and the counterweight portion is placed on the circuit board.

8. The electrical connector according to claim 7, characterized in that : The tail of the extension part is further back than the multiple welding parts in the front-to-back direction, and the tail of the extension part is embedded in the counterweight part.

9. The electrical connector according to claim 8, characterized in that : A plurality of glue reduction grooves are recessed upward from the bottom surface of the counterweight portion, and the tail of the extension portion along the front-to-back direction is located between the hollowed-out portion and the glue reduction groove.

10. An electrical connector assembly, characterized in that ,include: An electrical connector, comprising an insulating shell, a metal shell housed in the insulating shell and a conductive terminal group, wherein a plug-in cavity is recessed at the front of the metal shell, the conductive terminal group has a plurality of contact portions and a plurality of welding portions, a plurality of the contact portions are exposed in the plug-in cavity, and a plurality of the welding portions are used to be welded to a circuit board, the insulating shell is integrally injection-molded to have a docking portion and a counterweight portion, a hollow portion is provided between the docking portion and the counterweight portion along the front-to-back direction, the hollow portion partially separates the docking portion and the counterweight portion along the front-to-back direction, the docking portion extends forward from the circuit board and has a docking space, the front portion of the metal shell is located in the docking space, the rear portion of the metal shell is at least partially located in the hollow portion, and the counterweight portion is placed above the circuit board; A docking connector is used to connect with the electrical connector. The docking connector includes a plug-in shell and an electrical module arranged in the plug-in shell. The plug-in shell is plugged into the docking space along the front-to-back direction. One end of the electrical module is docked with the front part of the metal shell and electrically connected to the conductive terminal group.

11. The electrical connector assembly according to claim 10, characterized in that: The plurality of welding portions are arranged in the left-right direction and welded to the surface of the circuit board, the hollow portion penetrates the top and bottom surfaces of the insulating shell in the up-down direction, the hollow portion further extends in the left-right direction close to the left and right sides of the insulating shell, the plurality of welding portions are located in the hollow portion, and the length of the hollow portion extending in the left-right direction is greater than the distance between the plurality of welding portions arranged in the left-right direction.

12. The electrical connector assembly according to claim 10, characterized in that: The metal shell has a docking body and an extension portion extending backward from the top wall of the docking body, the extension portion passes through the hollow portion in the front-to-back direction, the tail of the extension portion is further back than the multiple welding portions, and the tail of the extension portion extends into the counterweight portion.

13. The electrical connector assembly according to claim 12, characterized in that: A plurality of glue reduction grooves are recessed upward from the bottom surface of the counterweight portion, and the tail of the extension portion along the front-rear direction is located between the hollowed-out portion and the glue reduction grooves.

14. The electrical connector assembly according to claim 12, characterized in that: The docking portion is recessed from front to back to form the docking space, and the docking space is divided into an upper part and a lower part by the docking body along the height direction, the rear wall surface of the lower part of the docking space is located in front of the circuit board, and the rear wall surface of the upper part of the docking space is further back than the rear wall surface of the lower part of the docking space, and the plug-in shell is divided into an upper part and a lower part by the electrical module along the height direction, and the front end surface of the upper part of the plug-in shell is further back than the front end surface of the lower part of the plug-in shell, and the upper and lower parts of the plug-in shell are respectively plugged into the upper and lower parts of the docking space, and the upper part of the plug-in shell partially overlaps with the circuit board along the up and down directions.

15. The electrical connector assembly according to claim 10, characterized in that: A cylinder portion is protruded in the docking space, and the front portion of the metal shell is accommodated in the cylinder portion. A first waterproof component is provided between the plug-in shell and the cylinder portion, and the first waterproof component abuts against the outer circumferential surface of the cylinder portion and the inner surface of the plug-in shell. The other end of the electrical module is electrically connected to a cable assembly, and the cable assembly extends out of the plug-in shell. A second waterproof component is provided on the outer periphery of the cable assembly, and a third waterproof component is provided on the outer periphery of the plug-in shell. An insulating covering component is molded on the outer periphery of the cable assembly and the plug-in shell and covers the second waterproof component and the third waterproof component.

Images