Electric connector and electric connector combination

Abstract

The utility model discloses an electric connector and an electric connector combination, an insulating body of the electric connector is provided with a retaining wall, a top wall, a bottom wall and two side walls which extend forwards from the retaining wall and enclose a butt joint space, the inner surface of each side wall is concavely provided with a joint groove, and the front surface of each side wall is concavely provided with a first material digging groove and a second material digging groove backwards. The first material digging groove, the joint groove and the butt joint space are communicated in sequence, so that the insulation body is convenient to demould, the risk caused by demoulding of an injection mould ejector pin is reduced, and when a butt joint connector is inserted into the butt joint space, a guide rib of the butt joint connector is only inserted into the joint groove and does not enter the first material digging groove, so that the injection mould ejector pin can be conveniently demoulded. Heat in the butt joint space is led out from the first material digging groove through the joint groove, the heat is rapidly discharged, the normal electric connection performance of the electric connector is met, the first material digging groove and the second material digging groove are formed in the side wall in a concave mode so as to reduce shrinkage and deformation, and the butt joint connector can be smoothly inserted and pulled out in the butt joint space.

Description

Technical field

[0001] The utility model relates to an electric connector and an electric connector combination, in particular to an electric connector with a guide structure and a hollowing structure and an electric connector combination. [Background Technology]

[0002] BMS series connectors are primarily installed near batteries to monitor various battery parameters. One existing BMS series electrical connector is designed to mate with a docking connector. It includes an insulating body and conductive terminals secured to the insulating body, which are surface-mounted and soldered to a circuit board. The insulating body has a docking space for the docking connector. The inner surface of the sidewalls of the insulating body is provided with a long groove, forming a mating groove. The outer surface of the sidewalls of the docking connector is provided with a long, raised rib. When the docking connector is inserted into the docking space of the electrical connector, the long, raised rib cooperates with the mating groove to guide the docking connector into engagement with the electrical connector. However, 1) after the injection molding of the insulating body is completed, since the coupling groove is a slender groove, the ejector pin of the injection mold entering the coupling groove is relatively thin and slender, and the insulating body is inconvenient to demold from the injection mold, and the ejector pin of the injection mold is easily deformed or damaged during demolding; 2) since the side wall of the insulating body is only provided with the coupling groove, the wall thickness of the side wall is inconsistent, and some parts of the wall thickness are thicker, so that when the temperature rises when the electrical connector is used around the battery, the thermal expansion capacity of some areas with thicker walls is poor, resulting in different internal stresses generated by the thicker part of the side wall and the thinner part of the side wall, making it difficult to plug and unplug with the docking connector; 3) since the docking space of the insulating body accommodates the docking connector when the electrical connector and the docking connector are fully mated, the plug interface of the electrical connector is blocked by the docking connector. The electrical connector is used in the car body and is easily heated due to the internal environment of the car. The heat accumulated in the docking space of the electrical connector cannot be quickly dissipated, affecting the electrical connection performance of the electrical connector.

[0003] Therefore, it is necessary to design an electrical connector and an electrical connector assembly to overcome the above problems. [Utility Model Content]

[0004] In response to the problems faced by the background technology, the purpose of the present invention is to provide an electrical connector and an electrical connector combination in which the side wall of the insulating body is provided with a first material groove, a joint groove and a docking space of the insulating body that are sequentially connected to achieve smooth plugging and unplugging and rapid heat dissipation.

[0005] In order to achieve the above purpose, the utility model adopts the following technical means:

[0006] An electrical connector is used to be inserted into a docking connector along a front-to-back direction, wherein the docking connector is provided with a guide rib, and is characterized in that the electrical connector comprises:

[0007] An insulating body is formed by injection molding, wherein the insulating body has a retaining wall, a top wall, a bottom wall and two side walls extending forward from the retaining wall, the top wall, the bottom wall and the two side walls enclosing a docking space, an inner surface of at least one of the two side walls is recessed with a joint groove, the joint groove extends in the front-to-back direction and penetrates forward, a first cutting groove and a second cutting groove are recessed backward from the front surface of the side wall, the depth of the first cutting groove and the second cutting groove being recessed backward is less than the length of the connecting groove extending in the front-to-back direction, the first cutting groove is provided on one side of the connecting groove in the left-right direction, the second cutting groove is provided on one side of the first cutting groove in the up-down direction, the first cutting groove, the connecting groove and the docking space are sequentially connected in the left-to-right direction;

[0008] at least one conductive terminal, the conductive terminal comprising a contact portion, a tail portion, and a fixing portion connecting the contact portion and the tail portion, the contact portion being received in the docking space, the fixing portion being retained by the retaining wall, and the tail portion extending out of the retaining wall;

[0009] When the docking connector is inserted into the docking space, the guide rib is only inserted into the engaging groove and does not enter the first cutting groove.

[0010] Furthermore, the outer side surface of the first cutting groove away from the joining groove is aligned with the outer side surface of the second cutting groove, and the wall thickness of the side wall outside the first cutting groove is equal to the wall thickness outside the second cutting groove.

[0011] Furthermore, one side surface of the first material cutting groove in the vertical direction is on the same horizontal plane as one side surface of the joining groove in the vertical direction, and the other side surface of the first material cutting groove in the vertical direction is staggered with the other side surface of the joining groove in the vertical direction.

[0012] Furthermore, each of the two side walls is recessed with the first material cutting groove and the second material cutting groove from its front surface to the rear, and the inner surface of each of the two side walls is recessed with a joining groove, wherein the first material cutting groove, the second material cutting groove and the joining groove on one side wall are arranged in 180-degree rotational symmetry with the first material cutting groove, the second material cutting groove and the joining groove on the other side wall.

[0013] Furthermore, the first material cutting groove and the second material cutting groove are recessed backward from the front surfaces of the two side walls, and the joining groove is recessed on the inner surfaces of the two side walls, wherein the first material cutting groove, the second material cutting groove and the joining groove on one side wall are symmetrically arranged with the first material cutting groove, the second material cutting groove and the joining groove on the other side wall.

[0014] Furthermore, a plurality of terminal holes arranged in two rows along the left-right direction are provided from the rear surface of the retaining wall forward to accommodate the plurality of conductive terminals, a plurality of front cutting grooves are recessed backward between the two rows of terminal holes on the front surface of the retaining wall, and a plurality of rear cutting grooves are recessed forward between the two rows of terminal holes on the rear surface of the retaining wall, and the left and right side edges of the front cutting grooves and the left and right side edges of the rear cutting grooves are staggered in the front-to-back direction.

[0015] Furthermore, the tail portion extends from the rear surface of the retaining wall and is soldered to the surface of a circuit board using surface mounting technology. Each of the side walls is provided with a positioning groove along the up and down directions for inserting a positioning piece. Each of the positioning pieces has at least one positioning foot for inserting into the fixing hole of the circuit board. A spacing groove is jointly recessed between the rear surface of each side wall and the retaining wall. The spacing groove is located between the terminal hole and the side wall. The spacing groove, the positioning groove and the first blanking groove are sequentially spaced from back to front. The positioning groove is located directly behind the first blanking groove. The spacing groove separates the side wall from the rear end of the retaining wall.

[0016] Furthermore, a supporting ridge is provided on each side of the bottom wall, the supporting ridge extends in the front-to-back direction and protrudes from the lower surface of the bottom wall, a notch is provided on the front edge of the bottom wall, the notch is located at the opening end edge of the docking space, the bottom wall is provided with a supporting block protruding from the lower surface of the bottom wall, the supporting block is located at the edge of the notch and has the same height as the supporting ridge, the two supporting ridges and the supporting block stand together on the circuit board, and an isolation space is formed between the bottom wall and the circuit board.

[0017] In order to achieve the above purpose, the present invention adopts another technical means:

[0018] An electrical connector assembly, characterized by comprising:

[0019] An electrical connector, the electrical connector comprising an injection-molded insulating body and a plurality of conductive terminals fixed to the insulating body, the insulating body having a top wall, a bottom wall and two side walls, the top wall, the bottom wall and the two side walls forming a docking space, the top wall being provided with at least one anti-cracking groove extending in the front-to-back direction, the inner surface of at least one of the two side walls being recessed with a coupling groove, the anti-cracking groove being connected to the coupling groove, the coupling groove extending in the front-to-back direction and penetrating forward, the front surface of the side wall being recessed with a first blanking groove backward from one side of the coupling groove, the depth of the first blanking groove being recessed backward being less than the length of the coupling groove extending in the front-to-back direction, a second blanking groove being provided on one side of the first blanking groove in the up-down direction, the first blanking groove, the coupling groove and the docking space being sequentially connected in the left-right direction, the conductive terminal comprising a contact portion;

[0020] A docking connector is inserted into the docking space in the front-to-back direction, the docking connector including a mating shell, at least one side surface of the mating shell being provided with at least one guide rib extending in the front-to-back direction, an upper surface of the mating shell being provided with at least one anti-fouling rib extending in the front-to-back direction, the anti-fouling rib being integrally connected to the guide rib, the mating shell having at least one terminal receiving groove extending and penetrating in the front-to-back direction, a plurality of mating terminals being assembled in the terminal receiving groove, the mating terminals including a mating cylindrical portion and a main spring piece bent inwardly toward the mating cylindrical portion and extending forwardly;

[0021] When the docking connector is inserted into the docking space, the contact portion is inserted into the docking cylindrical portion and elastically abuts against the main elastic piece, the guide rib is only inserted into the engagement groove and the guide rib is gap-fitted with the inner wall surface of the engagement groove, the guide rib does not enter the first material removal groove, and the anti-fool rib is inserted into the anti-fool groove.

[0022] The locking portion may be configured to lock the locking cam of the locking cam and the retaining member, and the locking cam may be configured to lock the locking cam of the locking cam and the retaining member, and the locking cam may be configured to lock the locking cam of the locking cam.

[0023] Furthermore, a locking spear extends from the inner wall of the terminal receiving groove, and a stabilizer is extended from one side of the front section of the third wall by first bending downward and then bending upward to lock with the locking spear. The cross-section of the stabilizer is U-shaped, and the third wall is stamped toward the second wall to form at least one reinforcing rib, and the reinforcing rib extends from the third wall to a side surface of the stabilizer. When the contact portion abuts downward against the main spring sheet, the reinforcing rib is used to limit the movement of the second wall toward the third wall.

[0024] Furthermore, the first material cutting groove and the second material cutting groove are recessed backward from the front surfaces of the two side walls, and the joining groove is recessed on the inner surfaces of the two side walls, wherein the first material cutting groove, the second material cutting groove and the joining groove on one side wall are symmetrically arranged with the first material cutting groove, the second material cutting groove and the joining groove on the other side wall.

[0025] Compared with the prior art, the present invention has the following beneficial effects: the first and second cavities are recessed backward from the front surface of the side wall to facilitate thinning of the side wall to reduce internal stress, facilitate molding, and reduce shrinkage and deformation, so that the docking connector can be smoothly plugged in and out of the docking space of the electrical connector. After the insulating body is just demolded from the injection mold, the first and second cavities are provided to avoid the insulating body from being under-molded; the first cavities, the coupling grooves and the docking space are sequentially connected in the left and right directions. This design makes it easy for the insulating body to be demolded from the injection mold, reducing the risk of deformation or damage of the ejector pin of the injection mold due to demolding; at the same time, the heat accumulated in the docking space can be quickly discharged from the first cavities through the coupling groove, and the heat is quickly discharged outside the electrical connector, accelerating the heat dissipation of the electrical connector, ensuring that the electrical connector is at a normal operating temperature, and meeting the normal electrical connection performance of the electrical connector.

Brief Description of the Drawings

[0026] Figure 1 This is a three-dimensional diagram of the electric connector assembly before docking in the utility model;

[0027] Figure 2 This is a three-dimensional diagram of the electric connector assembly after docking in the utility model;

[0028] Figure 3 for Figure 2 A top view of

[0029] Figure 4 for Figure 3 Cross-sectional view along AA direction;

[0030] Figure 5 This is a partial cross-sectional view along the left and right directions of the electrical connector assembly of the present invention after docking;

[0031] Figure 6 This is an exploded view of the electrical connector in the present utility model;

[0032] Figure 7 It is a three-dimensional diagram of the insulating body in the utility model;

[0033] Figure 8 This is a front view of the electrical connector of the present invention mounted on a circuit board;

[0034] Figure 9 for Figure 8 Cross-sectional view along direction BB;

[0035] Figure 10 for Figure 8 Cross-sectional view along CC direction;

[0036] Figure 11 A three-dimensional diagram of the mating terminal in the present utility model;

[0037] Figure 12 This is a front view of the insulating body according to the second embodiment of the present invention.

[0038] Description of the accompanying drawings for the specific embodiments:

[0039]

[0040] [Specific implementation method]

[0041] The specific embodiments of the present invention are further described below with reference to the accompanying drawings:

[0042] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the position or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0043] like Figure 1-4 As shown in Figures 8 and 9, an electrical connector assembly includes an electrical connector 100 and a mating connector 200 inserted into the electrical connector 100 along a plugging direction. The plugging direction of the electrical connector 100 is defined as the front-to-back direction X. For ease of understanding, the front-to-back direction X is represented by the X-axis, with the positive direction of the X-axis representing the forward direction. The left-to-right direction Y perpendicular to the front-to-back direction X of the electrical connector 100 is represented by the Y-axis, with the positive direction of the Y-axis representing the left direction. The up-down direction Z perpendicular to the front-to-back direction X and the left-to-right direction Y of the electrical connector 100 is represented by the Z-axis, with the positive direction of the Z-axis representing the upward direction. The electrical connector 100 is mounted on a circuit board P and includes an insulating body 1, at least one conductive terminal 2, and two positioning plates 3. The mating connector 200 is used to connect cables and includes a mating housing 4, at least one mating terminal 5, and a terminal position assurance member 6.

[0044] like Figure 4 、 6As shown in Figures 7, 8, and 10, in the electrical connector 100, the insulating body 1 is mounted on the upper surface of the circuit board P, with the front edge of the insulating body 1 protruding forward from the edge of the circuit board P in the front-to-back direction X. The insulating body 1 has a retaining wall 11, which is perpendicular to the circuit board P. A top wall 12, a bottom wall 13, and two side walls 14 extend forward from the retaining wall 11. The top wall 12, the bottom wall 13, and the two side walls 14 define a mating space 15, and the mating connector 200 is inserted rearwardly into the mating space 15 in the front-to-back direction X. A plurality of terminal holes 111 are formed forwardly from the rear surface of the retaining wall 11 in two rows arranged in the left-right direction Y. A plurality of front undercut grooves 112 are recessed rearwardly between the two rows of terminal holes 111 on the front surface of the retaining wall 11. The plurality of front undercut grooves 112 are arranged in a row in the left-right direction Y and do not extend rearwardly through the retaining wall 11. The rear surface of the retaining wall 11 is recessed with a plurality of rear cutting grooves 113 between the two rows of terminal holes 111. The plurality of rear cutting grooves 113 are arranged in a row along the left-right direction Y and do not penetrate the retaining wall 11 forward. The plurality of rear cutting grooves 113 are located directly behind the plurality of front cutting grooves 112. The left and right side edges of the plurality of front cutting grooves 112 and the left and right side edges of the plurality of rear cutting grooves 113 are staggered along the front-to-back direction X, so that after cutting, the difference in wall thickness of the retaining wall 11 is reduced while ensuring the strength of the retaining wall 11, avoiding the overall strength weakening due to the consistency of the front and rear cutting dimensions. Not only does the electrical connector 100 meet the requirements of lightweight, but it can also ensure that the retaining wall 11 has sufficient strength to fix the conductive terminal 2. The length of each rear cut groove 113 along the front-to-back direction X is greater than the length of each front cut groove 112 along the front-to-back direction X, so that the ejector pins of the injection mold located in the front cut groove 112 can be made shorter, avoiding damage to the ejector pins of the injection mold located in the front cut groove 112 during demolding of the insulating body 1 due to the longer ejector pins. The width of the two outermost front cutting grooves 112 distributed in the left-right direction Y is smaller than the width of the other front cutting grooves 112, but the width of each front cutting groove 112 in the left-right direction Y is greater than the width of each rear cutting groove 113 in the left-right direction Y, and the spacing between any two adjacent front cutting grooves 112 is equal, so as to ensure that the multiple front cutting grooves 112 are evenly arranged on the retaining wall 11 along the left-right direction Y, and the structural stability of the retaining wall 11 is ensured, and the height of each front cutting groove 112 along the up-down direction Z is greater than the height of each rear cutting groove 113 along the up-down direction Z, so that the cross-sectional area of each front cutting groove 112 is larger, so that the ejector pin of the injection mold for the front cutting groove 112 can be made larger and shorter, which is convenient for demolding the insulating body 1.

[0045] like Figure 7 、 8 As shown, the top wall 12 is provided with at least one fool-proof groove 121, and the fool-proof groove 121 extends along the front-to-back direction X. In this embodiment, there are two fool-proof grooves 121, which are respectively distributed on the left and right inner sides of the top wall 12 and are respectively adjacent to the two side walls 14. The fool-proof groove 121 is used to prevent the docking connector 200 from being inserted into the docking space 15 in an incorrect manner. Of course, in other embodiments, the top wall 12 may only be provided with one fool-proof groove 121, which is not limited here.

[0046] like Figure 6-8 As shown, the bottom wall 13 is used to be placed on the upper surface of the circuit board P. A supporting ridge 131 is provided on the left and right sides of the bottom wall 13 respectively. The supporting ridge 131 extends along the front-to-back direction X and protrudes downward from the lower surface of the bottom wall 13. The supporting ridge 131 is used to support the upper surface of the circuit board P, so that the electrical connector 100 and the circuit board P are spaced apart to form an isolation space. On the other hand, the direct contact area between the bottom wall 13 and the circuit board P is directly reduced, thereby reducing the heat directly conducted from the circuit board P through the insulating body 1 to the docking space 15. A notch 132 is recessed backwards at the front edge of the bottom wall 13, and the notch 132 is located at the open end edge of the docking space 15, so that the operator can easily pull out the docking connector 200 from the electrical connector 100. The bottom wall 13 is provided with a support block 133 protruding from the lower surface of the bottom wall 13, and the support block 133 is located between the two support ridges 131 in the left-right direction Y. The support block 133 is located at the edge of the notch 132 and has the same height as the support ridge 131. The two support ridges 131 and the support block 133 stand together on the circuit board P. The support block 133 further supports the bottom wall 13 to prevent the bottom wall 13 from collapsing downward, thereby ensuring that there is sufficient spacing between the bottom wall 13 and the circuit board P.

[0047] like Figure 5-9As shown, the inner surface of at least one of the two side walls 14 is recessed with a joint groove 141, and the joint groove 141 extends along the front-to-back direction X and penetrates forward, and a first cut groove 142 and a second cut groove 143 are recessed backward from the front surface of the side wall 14. In this embodiment, the first cut groove 142 and the second cut groove 143 are recessed backward from the front surfaces of the two side walls 14, so that the side wall 14 is thinned to reduce internal stress, facilitate molding, and reduce shrinkage and deformation, so that the docking connector 200 can be The docking space 15 of the electrical connector 100 is smoothly plugged in and out. After the insulating body 1 is just demolded from the injection mold, the first ejection groove 142 and the second ejection groove 143 are provided to prevent the insulating body 1 from being undermolded. The inner surfaces of the two side walls 14 are both recessed with the engaging groove 141 (of course, in other embodiments, only one of the side walls 14 may be provided with the engaging groove 141, and the other side wall 14 may not be provided with the engaging groove 141, as long as the wall thickness difference of the other side wall 14 is small, which is not limited here). The depth of the first material discharging groove 142 and the second material discharging groove 143 is recessed backward and is less than the length of the connecting groove 141 extending along the front-to-back direction X. The first material discharging groove 142 is arranged on the side of the connecting groove 141 close to the outer surface of the side wall 14 in the left-right direction Y, and the second material discharging groove 143 is arranged on the side of the first material discharging groove 142 in the up-down direction Z. In this embodiment, the first material discharging grooves 142 on the two side walls 14 are both arranged in the upper half of the side wall 14, and the second material discharging grooves 143 are arranged in the lower half of the side wall 14. The two connecting grooves 141 are respectively connected to the two anti-fouling grooves 121 (of course, in other embodiments, the first material discharging grooves 142 on the two side walls 14 can be arranged at the lower half of the side wall 14 at the same time, and the second material discharging grooves 143 are arranged at the upper half of the side wall 14 at the same time. The connecting grooves 141 on the two side walls 14 are always located on one side of the first material discharging groove 142 and are connected, which is not limited here). In this embodiment, the two engagement grooves 141 are respectively connected to the two anti-idiot grooves 121. In other embodiments, the two engagement grooves 141 can also be spaced apart from the two anti-idiot grooves 121, as long as the anti-idiot grooves 121 are connected to the docking space 15.

[0048] The outer side surface of the first undercut 142 on the same side wall 14, away from the engagement groove 141, is aligned with the outer side surface of the second undercut 143. The wall thickness of the same side wall 14 outside the first undercut 142 and outside the second undercut 143 is equal, thereby ensuring that the thickness of the two parts at this location is the same, generating consistent internal stress, and ensuring smooth insertion and removal from the docking connector 200. The first undercut 142, the engagement groove 141, and the docking space 15 are sequentially connected along the left-right direction Y. This design facilitates demolding of the insulating body 1 from the injection mold, reducing the risk of deformation or damage to the ejector pins of the injection mold due to demolding. At the same time, it allows heat accumulated in the docking space 15 to be quickly dissipated from the first undercut 142 through the engagement groove 141, quickly dissipating the heat out of the electrical connector 100, accelerating heat dissipation of the electrical connector 100, ensuring that the electrical connector 100 is at a normal operating temperature, and meeting the normal electrical connection performance of the electrical connector 100. The aforementioned foolproof groove 121 is connected to the corresponding engaging groove 141. Since the engaging groove 141 is also connected to the first cutting groove 142, the heat inside the docking space 15 can flow from the foolproof groove 121 through the engaging groove 141 into the first cutting groove 142 during docking to be discharged, thereby accelerating heat dissipation. One of the side surfaces of the first cutting groove 142 in the vertical direction Z is on the same horizontal plane as one of the side surfaces of the engaging groove 141 in the vertical direction Z. In this embodiment, the bottom surface of the first cutting groove 142 is on the same horizontal plane as the bottom surface of the engaging groove 141, which facilitates the positioning of the injection mold. The other side surface of the first cutting groove 142 in the vertical direction Z is offset from the other side surface of the engaging groove 141 in the vertical direction Z. In this way, the electrical connector 100 and the docking connector 200 can be more easily identified when plugged into each other, so as to facilitate quick plugging. In this embodiment, the first cutting groove 142, the second cutting groove 143 and the engaging groove 141 on one of the side walls 14 are symmetrically arranged with the first cutting groove 142, the second cutting groove 143 and the engaging groove 141 on the other side wall 14. Such a design can make the engaging groove 141 of the electrical connector 100 better fit and plug with the connector, and achieve better positioning effect. In addition, by setting a symmetrical groove structure, the production of the injection mold can be simplified.Each of the side walls 14 is provided with a positioning groove 144 along the up-down direction Z for the positioning piece 3 to be inserted. A spacing groove 145 is jointly provided between the rear surface of each side wall 14 and the retaining wall 11. The spacing groove 145 is located between the terminal hole 111 and the side wall 14. The spacing groove 145, the positioning groove 144 and the first cutting groove 142 are sequentially spaced from back to front. The positioning groove 144 is located directly behind the first cutting groove 142. The spacing groove 145 separates the side wall 14 from the rear end of the retaining wall 11. Such a design allows the side wall 14 to be hollowed out in the front-to-back direction X to reduce the thickness difference of the side wall 14 in the front-to-back direction, further reducing internal stress. The design of the spacing groove 145 separates the connection between the side wall 14 and the rear end of the retaining wall 11, preventing the thermal expansion of the side wall 14 from affecting the retaining wall 11 and then pulling the tail 23 of the conductive terminal 2, thereby improving the flatness of the conductive terminal 2 welded on the upper surface of the circuit board P using surface mount technology, and the tail 23 can be firmly welded to the circuit board P.

[0049] like Figure 4 、 6 As shown, the conductive terminal 2 is assembled from back to front into the insulating body 1. The conductive terminal 2 includes a contact portion 21, a tail portion 23, and a fixing portion 22 connecting the contact portion 21 and the tail portion 23. The contact portion 21 is received within the docking space 15, and the fixing portion 22 is retained by the retaining wall 11. The tail portion 23 extends from the rear surface of the retaining wall 11 and is soldered to the top surface of the circuit board P using surface mount technology. In this embodiment, a plurality of conductive terminals 2 are provided, arranged in two rows along the left-right direction Y and correspondingly received in the plurality of terminal holes 111.

[0050] like Figure 6 、 8As shown, each positioning piece 3 is plate-shaped and inserted into the corresponding positioning slot 144. From top to bottom, the positioning piece 3 comprises a base, a middle portion, and two positioning legs 31. The base is larger than the middle portion in the front-to-back direction X. Two barbs are provided on each of the front and rear sides of the base to interfere with the inner wall of the positioning slot 144. The upper barb protrudes more than the lower barb, resulting in a greater interference fit between the upper barb and the lower barb. A strip hole is provided in the middle portion, extending upward to the base and beyond the highest level of the lower barb. The two positioning legs 31 are inserted into the fixing holes of the circuit board P. The space between the bottom wall 13 and the upper surface of the circuit board P facilitates tinning and securing the positioning legs 31 in the fixing holes of the circuit board P.

[0051] like Figure 1 、 4As shown in Figures 5 and 6, in the docking connector 200, at least one side surface of the mating shell 4 is provided with at least one guide rib 41 extending along the front-to-back direction X. In this embodiment, the mating shell 4 is provided with two guide ribs 41 corresponding to the engagement groove 141. The guide ribs 41 are used to engage with the engagement groove 141 to guide the docking connector 200 to be inserted into the electrical connector 100. The two guide ribs 41 are respectively provided on the upper halves of the two side surfaces of the mating shell 4. The top surface of the mating housing 4 is provided with at least one anti-fouling rib 42 extending in the front-to-back direction X. In this embodiment, two anti-fouling ribs 42 are provided, one on each left and right side of the top surface of the mating housing 4, adjacent to the corresponding guide ribs 41 on the side surfaces of the mating housing 4. The adjacent anti-fouling ribs 42 are integrally connected to the guide ribs 41, so that the guide ribs 41 and the top surface of the mating housing 4 are flush with each other. The anti-fouling ribs 42 protrude upward from the top surface of the mating housing 4, forming an L-shape with the corresponding guide ribs 41. The mating housing 4 has at least one terminal receiving slot 43 extending in the front-to-back direction X and extending through both ends. A locking lance 44 extends from the inner wall of the terminal receiving slot 43. In this embodiment, a plurality of terminal receiving slots 43 are provided, arranged in two rows, one above the other. Because the dimension of the engagement groove 141 in the vertical direction Z is slightly larger than the dimension of the guide rib 41 in the vertical direction Z, and the dimension of the guide rib 41 in the horizontal direction Y is slightly smaller than the dimension of the engagement groove 141 in the horizontal direction Y, a gap exists between the guide rib 41 and the wall surface of the engagement groove 141. Both the horizontal and vertical surfaces of the guide rib 41 are chamfered, and the front end of the guide rib 41 is provided with an inclined surface, thereby increasing the gap between the guide rib 41 and the engagement groove 141, thereby better dissipating heat accumulated within the docking space 15. A locking groove 45 is recessed upwardly on the bottom surface of the mating housing 4. The locking groove 45 extends in the horizontal direction Y and is connected to all of the terminal receiving grooves 43.

[0052] like Figure 4 、 11As shown, in this embodiment, a plurality of mating terminals 5 are provided corresponding to the terminal receiving slots 43, and each mating terminal 5 is assembled in each terminal receiving slot 43 from front to back. Each mating terminal 5 includes a docking cylindrical portion S and a wiring tail Q connected to the docking cylindrical portion S, and the wiring tail Q is used to rivet a cable, thereby establishing an electrical connection with the cable. The docking cylindrical portion S has a first wall 51 and a second wall 52 and a third wall 53 arranged opposite to the first wall 51 in the up-down direction Z. The third wall 53 is stacked below the second wall 52. The docking cylindrical portion S also has a fourth wall 54 and a fifth wall 55 arranged in the left-right direction. The fourth wall 54 connects the right side of the first wall 51 and the right side of the second wall 52, and the fifth wall 55 connects the left side of the first wall 51 and the left side of the third wall 53. The first wall 51 is provided with at least one first contact protrusion 511 projecting toward the interior of the docking cylindrical portion S. In this embodiment, the first wall 51 is provided with two first contact protrusions 511 projecting from the front to the back of the docking cylindrical portion S. An opening is provided in the middle of the third wall 53 to divide the third wall 53 into a front section 531 and a rear section 532. A main elastic piece 521 extends from the second wall 52 toward the interior of the docking cylindrical portion S and bends forward. A second contact protrusion 5211 is projecting from the inner surface of the main elastic piece 521. The second contact protrusion 5211 is arranged opposite to the first contact protrusion 511, and the contact portion 21 is inserted into the area between the first contact protrusion 511 and the second contact protrusion 5211. An auxiliary elastic piece 5321 is bent from the rear section 532 of the third wall 53 toward the main elastic piece 521 and extends backward. The auxiliary elastic piece 5321 has a first bending section 5321A, a buffer section 5321B and a limiting section 5321C extending backward in sequence. The limiting section 5321C is bent and extended from the buffer section 5321B and is located directly below the second contact protrusion 5211 to limit the second contact protrusion 5211 in the up and down direction Z, so as to limit the main elastic piece 521 upward to ensure that the second contact protrusion 5211 always elastically abuts against the contact portion 21. The vertical distances between the buffer section 5321B and the limiting section 5321C and the rear section 532 are both greater than the plate thickness of the rear section 532, specifically referring to the vertical distance between the upper surface of the buffer section 5321B and the upper surface of the rear section 532, and the vertical distances between the upper surface of the limiting section 5321C and the upper surface of the rear section 532 are both greater than the plate thickness of the third wall 53, so as to avoid the limiting section 5321C of the auxiliary spring piece 5321 being obstructed by the third wall 53 of the docking cylindrical portion S during the up and down movement.A stabilizer 5311 is extended from the front section 531 by first bending downward and then bending upward. The cross section of the stabilizer 5311 is U-shaped and locked with the locking spear 44. The front section 531 is stamped toward the second wall 52 to form at least one reinforcing rib 5312. The reinforcing rib 5312 extends from the front section 531 to a side surface of the stabilizer 5311. When the contact portion 21 of the conductive terminal 2 is inserted into the docking cylindrical portion S, the second contact protrusion 5211 of the main elastic piece 521 elastically abuts against the contact portion 2 1. The second wall 52 integral with the main elastic piece 521 is restricted by the front section 531 to prevent the second wall 52 from deforming outward. The reinforcing rib 5312 is used to restrict the second wall 52 from moving toward the third wall 53. The provision of the reinforcing rib 5312 strengthens the strength of the front section 531 to ensure the stability of the structure of the docking cylindrical portion S. On the other hand, the provision of the reinforcing rib 5312 also enables the stabilizer 5311 to be better locked with the locking spear 44, thereby improving the locking retention force of the stabilizer 5311.

[0053] like Figure 4-5 As shown, the terminal position ensuring member 6 is assembled into the locking groove 45 from bottom to top, locking the plurality of mating terminals 5 , thereby preventing the mating terminals 5 from exiting the terminal receiving groove 43 .

[0054] like Figure 1 、 3 -5 shows the mating process of the electrical connector 100 and the docking connector 200: when the docking connector 200 is inserted backward into the docking space 15, the guide rib 41 enters the engagement groove 141 to guide the docking connector 200 to be correctly plugged and mated with the electrical connector 100, and the guide rib 41 is only inserted into the engagement groove 141, and the guide rib 41 does not enter the first material removal groove 142, the anti-fool rib 42 is inserted into the anti-fool rib 121, and the guide rib 41 is gap-fitted with the inner wall surface of the engagement groove 141, the contact portion 21 of the conductive terminal 2 is inserted into the docking cylindrical portion S of the mating terminal 5 to establish an electrical connection, the first contact protrusion 511 and the second contact protrusion 5211 abut against the contact portion 21, and the limiting section 5321C limits the main spring piece 521 from moving excessively downward.

[0055] like Figure 12As shown, the second embodiment of the present invention is different from the first embodiment in that: the structure of the insulating body 1 is different. Specifically, the two side walls 14 of the insulating body 1 are recessed with a first cutting groove 142 and a second cutting groove 143 from the front surface to the rear, and the inner surfaces of the two side walls 14 are recessed with a joining groove 141, wherein the first cutting groove 142, the second cutting groove 143 and the joining groove 141 on one side wall 14 are arranged in the upper half of the side wall 14, and the second cutting groove 143 is located below the first cutting groove 142, while the first cutting groove 142 and the joining groove 141 on the other side wall 14 are arranged in the lower half of the side wall 14, and the second cutting groove 143 is above the first cutting groove 142. The first cutout groove 142, the second cutout groove 143, and the engaging groove 141 on one of the two side walls 14 are arranged 180 degrees rotationally symmetrically with the first cutout groove 142, the second cutout groove 143, and the engaging groove 141 on the other side wall 14. With this design, when the electrical connector 100 and the docking connector 200 are plugged together, the operator can more easily identify whether they are correctly plugged together, thereby facilitating quick plugging. The other structures of the second embodiment are the same as those of the first embodiment, and therefore will not be repeated here.

[0056] In summary, the electrical connector 100 and the electrical connector assembly of the present invention have the following beneficial effects:

[0057] 1. The first undercut groove 142 and the second undercut groove 143 are recessed backward from the front surface of the side wall 14 to facilitate thinning of the side wall 14 to reduce internal stress, facilitate molding, and reduce shrinkage and deformation, so that the docking connector 200 can be smoothly plugged and unplugged from the docking space 15 of the electrical connector 100. After the insulating body 1 is just demolded from the injection mold, the first undercut groove 142 and the second undercut groove 143 are provided to avoid the insulating body 1 from being undermolded; the first undercut groove 142, the engaging groove 141 and The docking spaces 15 are sequentially connected along the left-right direction Y. This design facilitates the demolding of the insulating body 1 from the injection mold, reducing the risk of deformation or damage of the ejector pin of the injection mold due to demolding; at the same time, the heat accumulated in the docking space 15 can be quickly discharged from the first discharge groove 142 through the engagement groove 141, and the heat is quickly discharged outside the electrical connector 100, thereby accelerating the heat dissipation of the electrical connector 100, ensuring that the electrical connector 100 is at a normal operating temperature, and meeting the normal electrical connection performance of the electrical connector 100.

[0058] 2. One side surface of the first chuck 142 in the up-down direction Z and one side surface of the engaging groove 141 in the up-down direction Z are on the same horizontal plane, which facilitates the positioning of the injection mold. The other side surface of the first chuck 142 in the up-down direction Z and the other side surface of the engaging groove 141 in the up-down direction Z are staggered up and down, which makes it easier to identify the electrical connector 100 and the docking connector 200 when they are plugged into each other, so as to facilitate quick plugging.

[0059] 3. The first cutout groove 142, the second cutout groove 143 and the engaging groove 141 on one of the side walls 14 are symmetrically arranged with the first cutout groove 142, the second cutout groove 143 and the engaging groove 141 on the other side wall 14. Such a design can make the engaging groove 141 of the electrical connector 100 better cooperate with the docking connector 200 for better positioning effect. In addition, by setting a symmetrical groove structure, the production of the injection mold can be simplified.

[0060] 4. A plurality of terminal holes 111 are provided from the rear surface of the retaining wall 11 to the front and arranged in two rows along the left-right direction Y. A plurality of front cutting grooves 112 are provided on the front surface of the retaining wall 11 between the two rows of terminal holes 111. A plurality of rear cutting grooves 113 are provided on the rear surface of the retaining wall 11 between the two rows of terminal holes 111. The left and right side edges of the plurality of front cutting grooves 112 and the left and right side edges of the plurality of rear cutting grooves 113 are staggered along the front-to-back direction X, so that after cutting, the difference in wall thickness of the retaining wall 11 is reduced while ensuring the strength of the retaining wall 11, avoiding the overall strength weakening due to the consistency of the front and rear cutting sizes. Not only does the electrical connector 100 meet the lightweight requirements, but it can also ensure that the retaining wall 11 has sufficient strength to fix the conductive terminal 2.

[0061] 5. The two side walls 14 are provided with the positioning groove 144 along the vertical direction Z for the positioning piece 3 to be inserted. The rear surface of each side wall 14 and the retaining wall 11 are jointly provided with the spacing groove 145. The spacing groove 145, the positioning groove 144 and the first cutting groove 142 are sequentially arranged from back to front. The positioning groove 144 is located directly behind the first cutting groove 142. The width of the spacing groove 145 is greater than the width of the positioning groove 144. Such a design can make the side walls 14 is hollowed out in the front-to-back direction X to reduce the thickness difference of the side wall 14 in the front-to-back direction, further reducing the internal stress. The design of the spacing groove 145 separates the connection between the side wall 14 and the rear end of the retaining wall 11, preventing the thermal expansion of the side wall 14 from affecting the retaining wall 11 and then pulling the tail 23 of the conductive terminal 2, thereby improving the flatness of the conductive terminal 2 welded on the upper surface of the circuit board P in the form of surface mounting technology, and the tail 23 can be firmly welded to the circuit board P.

[0062] 6. The front edge of the bottom wall 13 is recessed backward to form the notch 132. The notch 132 is located at the open end edge of the docking space 15 to facilitate the operator to easily remove the docking connector 200 from the electrical connector 100. The bottom wall 13 is provided with a support block 133 protruding from the lower surface of the bottom wall 13. The support block 133 further supports the bottom wall 13 to prevent the bottom wall 13 from collapsing downward, ensuring sufficient spacing between the bottom wall 13 and the circuit board P, thereby facilitating heat dissipation.

[0063] 7. The foolproof groove 121 is connected to the corresponding engaging groove 141. Since the engaging groove 141 is also connected to the first cutting groove 142, the heat inside the docking space 15 can flow from the foolproof groove 121 through the engaging groove 141 into the first cutting groove 142 during docking, thereby accelerating heat dissipation.

[0064] The above detailed description is only an illustration of the preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Therefore, all equivalent technical changes made by using the description and illustrations of this invention are included in the patent scope of this invention.

Claims

1. An electrical connector for inserting with a docking connector in a front-to-back direction, wherein the docking connector is provided with a guide rib, characterized in that: The electrical connector comprises: An insulating body is formed by injection molding, wherein the insulating body has a retaining wall, a top wall, a bottom wall and two side walls extending forward from the retaining wall, the top wall, the bottom wall and the two side walls enclosing a docking space, an inner surface of at least one of the two side walls is recessed with a joint groove, the joint groove extends in the front-to-back direction and penetrates forward, a first cutting groove and a second cutting groove are recessed backward from the front surface of the side wall, the depth of the first cutting groove and the second cutting groove being recessed backward is less than the length of the connecting groove extending in the front-to-back direction, the first cutting groove is provided on one side of the connecting groove in the left-right direction, the second cutting groove is provided on one side of the first cutting groove in the up-down direction, the first cutting groove, the connecting groove and the docking space are sequentially connected in the left-to-right direction; at least one conductive terminal, the conductive terminal comprising a contact portion, a tail portion, and a fixing portion connecting the contact portion and the tail portion, the contact portion being received in the docking space, the fixing portion being retained by the retaining wall, and the tail portion extending out of the retaining wall; When the docking connector is inserted into the docking space, the guide rib is only inserted into the engaging groove and does not enter the first cutting groove.

2. The electrical connector according to claim 1, wherein: The outer side surface of the first cutting groove away from the joining groove is aligned with the outer side surface of the second cutting groove, and the wall thickness of the side wall outside the first cutting groove is equal to the wall thickness outside the second cutting groove.

3. The electrical connector according to claim 1, wherein: One side surface of the first material cutting groove in the vertical direction is on the same horizontal plane as one side surface of the joining groove in the vertical direction, and the other side surface of the first material cutting groove in the vertical direction is staggered with the other side surface of the joining groove in the vertical direction.

4. The electrical connector according to claim 3, wherein: Both of the side walls are recessed with the first material cutting groove and the second material cutting groove from the front surface to the rear, and the inner surface of both of the side walls is recessed with the joining groove, wherein the first material cutting groove, the second material cutting groove and the joining groove on one of the side walls are arranged in 180-degree rotational symmetry with the first material cutting groove, the second material cutting groove and the joining groove on the other side wall.

5. The electrical connector according to claim 1, wherein: The first material cutting groove and the second material cutting groove are recessed backward from the front surfaces of the two side walls, and the joining groove is recessed on the inner surfaces of the two side walls, wherein the first material cutting groove, the second material cutting groove and the joining groove on one side wall are symmetrically arranged with the first material cutting groove, the second material cutting groove and the joining groove on the other side wall.

6. The electrical connector according to claim 1, wherein: A plurality of terminal holes arranged in two rows along the left-right direction are provided from the rear surface of the retaining wall to the front to accommodate the plurality of conductive terminals. A plurality of front cutting grooves are recessed backward between the two rows of terminal holes on the front surface of the retaining wall. A plurality of rear cutting grooves are recessed forward between the two rows of terminal holes on the rear surface of the retaining wall. The left and right side edges of the front cutting grooves and the left and right side edges of the rear cutting grooves are staggered in the front-to-back direction.

7. The electrical connector according to claim 6, wherein: The tail portion extends from the rear surface of the retaining wall and is soldered to the surface of a circuit board using surface mounting technology. Each of the side walls is provided with a positioning groove along the up and down directions for inserting a positioning piece. Each of the positioning pieces has at least one positioning foot for inserting into the fixing hole of the circuit board. A spacing groove is jointly recessed between the rear surface of each side wall and the retaining wall. The spacing groove is located between the terminal hole and the side wall. The spacing groove, the positioning groove and the first blanking groove are sequentially spaced from back to front. The positioning groove is located directly behind the first blanking groove. The spacing groove separates the side wall from the rear end of the retaining wall.

8. The electrical connector according to claim 7, wherein: A supporting ridge is provided on each side of the bottom wall, the supporting ridges extending in the front-to-back direction and protruding from the lower surface of the bottom wall, a notch is provided on the front edge of the bottom wall, the notch is located at the open end edge of the docking space, the bottom wall is provided with a supporting block protruding from the lower surface of the bottom wall, the supporting block is located at the edge of the notch and has the same height as the supporting ridge, the two supporting ridges and the supporting block stand together on the circuit board, and an isolation space is formed between the bottom wall and the circuit board.

9. An electrical connector assembly, characterized in that: include: An electrical connector, the electrical connector comprising an injection-molded insulating body and a plurality of conductive terminals fixed to the insulating body, the insulating body having a top wall, a bottom wall and two side walls, the top wall, the bottom wall and the two side walls forming a docking space, the top wall being provided with at least one anti-cracking groove extending in the front-to-back direction, the inner surface of at least one of the two side walls being recessed with a coupling groove, the anti-cracking groove being connected to the coupling groove, the coupling groove extending in the front-to-back direction and penetrating forward, the front surface of the side wall being recessed with a first blanking groove backward from one side of the coupling groove, the depth of the first blanking groove being recessed backward being less than the length of the coupling groove extending in the front-to-back direction, a second blanking groove being provided on one side of the first blanking groove in the up-down direction, the first blanking groove, the coupling groove and the docking space being sequentially connected in the left-right direction, the conductive terminal comprising a contact portion; A docking connector is inserted into the docking space in the front-to-back direction, the docking connector including a mating shell, at least one side surface of the mating shell being provided with at least one guide rib extending in the front-to-back direction, an upper surface of the mating shell being provided with at least one anti-fouling rib extending in the front-to-back direction, the anti-fouling rib being integrally connected to the guide rib, the mating shell having at least one terminal receiving groove extending and penetrating in the front-to-back direction, a plurality of mating terminals being assembled in the terminal receiving groove, the mating terminals including a mating cylindrical portion and a main spring piece bent inwardly toward the mating cylindrical portion and extending forwardly; When the docking connector is inserted into the docking space, the contact portion is inserted into the docking cylindrical portion and elastically abuts against the main elastic piece, the guide rib is only inserted into the engagement groove and the guide rib is gap-fitted with the inner wall surface of the engagement groove, the guide rib does not enter the first material removal groove, and the anti-fool rib is inserted into the anti-fool groove.

10. The electrical connector assembly according to claim 9, wherein: The docking cylindrical portion comprises a first wall in the up-down direction, a second wall and a third wall arranged opposite to the first wall, the third wall being superimposed on the lower side of the second wall, the first wall being provided with at least one first contact protrusion protruding toward the inner side of the docking cylindrical portion, the main elastic piece being bent and extended forward from the second wall, the inner surface of the main elastic piece being provided with a second contact protrusion protruding, an opening being opened from the middle of the third wall to divide the third wall into a front section and a rear section, an auxiliary elastic piece being bent and extended backward from the rear section toward the main elastic piece, the auxiliary elastic piece comprising a first bending section, a buffer section and a limiting section extending backward in sequence, the limiting section being bent and extended from the buffer section and being located directly below the second contact protrusion, the first contact protrusion and the second contact protrusion abutting the contact portion in the up-down direction, the limiting section limiting the main elastic piece from excessive downward movement, and the vertical distances between the buffer section and the limiting section and the third wall are both greater than the plate thickness of the third wall.

11. The electrical connector assembly according to claim 10, wherein: A locking spear extends from the inner wall of the terminal receiving groove, and a stabilizer is extended from one side of the front section of the third wall by first bending downward and then bending upward to lock with the locking spear. The cross-section of the stabilizer is U-shaped, and the third wall is stamped toward the second wall to form at least one reinforcing rib, and the reinforcing rib extends from the third wall to a side surface of the stabilizer. When the contact portion abuts downward against the main elastic sheet, the reinforcing rib is used to limit the movement of the second wall toward the third wall.

12. The electrical connector assembly according to claim 9, wherein: The first material cutting groove and the second material cutting groove are recessed backward from the front surfaces of the two side walls, and the joining groove is recessed on the inner surfaces of the two side walls, wherein the first material cutting groove, the second material cutting groove and the joining groove on one side wall are symmetrically arranged with the first material cutting groove, the second material cutting groove and the joining groove on the other side wall.

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