阅读说明：本技术 一种电连接器及其制造方法 (Electric connector and manufacturing method thereof ) 是由 童进 潘成禄 于 2021-08-04 设计创作，主要内容包括：本发明公开了一种电连接器及其制造方法,属于电连接器技术领域。包括有外壳、连接器主体,所述连接器主体安装在外壳内,其特征在于,所述连接器主体上设置有导电端子组,所述导电端子组,所述导电端子组包括有一个以上的第一导电端子,所述第一导电端子的前端为往回弯折的结构。相比于现有技术：首先,本发明的的电连接器的导电端子可实现正反两面的导电功能,能够简化电连接器的结构与制造工艺、减少原料,提高生产效率,节省成本；其次,本发明的导电端子组中第二导电端子与第三导电端子的前端分别置于正面和反面,正反两面任意插接都可以实现一定的顺序和时序接触的功能；最后,本发明结构简单、成本低,便于使用和推广。(The invention discloses an electric connector and a manufacturing method thereof, and belongs to the technical field of electric connectors. Including shell, connector main part, the connector main part is installed in the shell, its characterized in that, be provided with conductive terminal group in the connector main part, conductive terminal group is including more than one first conductive terminal, the front end of first conductive terminal is the structure of bending back. Compared with the prior art: firstly, the conductive terminal of the electric connector can realize the conductive function of the front side and the back side, can simplify the structure and the manufacturing process of the electric connector, reduce raw materials, improve the production efficiency and save the cost; secondly, the front ends of the second conductive terminal and the third conductive terminal in the conductive terminal group are respectively arranged on the front side and the back side, and the front side and the back side can be randomly spliced to realize the function of contacting in a certain sequence and time sequence; finally, the invention has simple structure, low cost and convenient use and popularization.)

1. The utility model provides an electric connector, including shell, connector main part, the connector main part is installed in the shell, its characterized in that, be provided with conductive terminal group in the connector main part, conductive terminal group is including more than one first conductive terminal, the front end of first conductive terminal is the structure of bending back.

2. The electrical connector of claim 1, wherein the first conductive terminal comprises a terminal body and a folded portion, and a joint between the terminal body and the folded portion is a U-shaped structure.

3. The electrical connector of claim 1, wherein the set of conductive terminals further comprises a second conductive terminal and a third conductive terminal, the first conductive terminal, the second conductive terminal and the third conductive terminal are arranged side by side, the first conductive terminal is disposed at two sides, and the second conductive terminal and the third conductive terminal are disposed in the middle;

the front ends of the second conductive terminal and the third conductive terminal are both arc-shaped structures in the vertical direction, and the arc-shaped structures of the second conductive terminal and the third conductive terminal are opposite in direction.

4. The electrical connector of claim 2, wherein the connector body further comprises a conductive terminal fixing plate, the conductive terminal fixing plate is provided with a conductive terminal mounting portion, the conductive terminal set is fixed on the conductive terminal mounting portion, and the conductive terminal set and the conductive terminal fixing plate are formed by injection molding.

5. The electrical connector as claimed in claim 4, wherein the terminal body and the folded portion are provided with bosses, the conductive terminal mounting portion is further provided with a groove adapted to the bosses, and the bosses are clamped in the grooves.

6. The electrical connector of claim 3, wherein the ends of the first, second and third conductive terminals are provided with solder pins, the solder pins are connected with solder pads, the connector body is further provided with a PCB, the solder pads are soldered on the PCB, and the first, second and third conductive terminals are all connected to the PCB through the solder pads.

7. An electrical connector as in claim 4 wherein said connector body further includes a center clip, said center clip being stacked above said conductive terminal mounting plate.

8. The electrical connector as claimed in claim 6, wherein the connector body further comprises a limiting groove, the PCB is provided with a limiting block, and the limiting block is engaged with the limiting groove.

The connector comprises a connector body and is characterized in that guide blocks which are opposite up and down are arranged on the contact surface of the connector body and a PCB, a guide groove is formed between the guide blocks, and the contact end of the PCB and the connector body is arranged in the guide groove.

9. An electrical connector as claimed in claim 6, wherein the housing is further provided with slots at two sides thereof, and two sides of the PCB are engaged with the slots.

10. A method of manufacturing an electrical connector as claimed in claim 1, wherein the method comprises the steps of:

s1: preparation of a conductive terminal group: manufacturing a conductive terminal group with double-sided conductive function by using a high-speed cold stamping process;

s2: one-time injection molding: performing primary in-mold injection molding on the conductive terminal group in the S1;

s3: and (3) secondary injection molding: putting the semi-finished product subjected to the primary injection molding of S2 into the middle clamping piece, and performing secondary injection molding;

s4: and (3) testing: removing waste belts and testing the product subjected to the secondary injection molding in the step S3, and repairing defective products;

s5: installing a shell;

s6: and (6) installing the PCB.

Technical Field

The invention belongs to the technical field of electric connectors, and particularly relates to an electric connector and a manufacturing method thereof.

Background

The internal conductive terminal set of the electrical connector needs to have both front and back conductive functions. The conductive terminal group of the existing electric connector is provided with a group of conductive terminal plastic injection molding insulator on the front side, and a group of conductive terminal plastic injection molding insulator on the back side, then the front and back two groups of conductive terminals are combined, a metal grounding sheet is placed in the middle, then the conductive terminal group and the front and back conductive terminals are placed in a mold cavity together for injection molding to obtain a body with conductive surfaces on the front and back sides, and then conductive terminals which are mutually conducted are placed on the front and back sides of a PCB plate to weld the front and back sides so as to realize mutual conduction of the front and back terminals. The electric connector has the defects of complex structure, more used materials, high production cost and low production efficiency of the internal conductive terminals.

Meanwhile, the manufacturing process of the electric connector needs multiple times of injection molding and welding after stamping, the manufacturing process is relatively complex, and the manufactured defective products are more and the product performance is poorer.

Disclosure of Invention

In order to solve the above problems, a primary object of the present invention is to provide an electrical connector and a method for manufacturing the same, which can simplify the structure and manufacturing process of the electrical connector, reduce raw materials, improve production efficiency, and save cost;

another objective of the present invention is to provide an electrical connector and a method for manufacturing the same, in which the front and back surfaces can be arbitrarily plugged to achieve a certain sequence and timing contact function.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the invention provides an electric connector, which comprises a shell and a connector main body, wherein the connector main body is arranged in the shell. The connector comprises a connector body and is characterized in that a conductive terminal group is arranged on the connector body and comprises more than one first conductive terminal, and the front end of each first conductive terminal is of a structure bent back. In the invention, the front and back surfaces of the first conductive terminal have the conductive function by arranging the backward bending structure at the front end of the first conductive terminal, the conductive function of the front and back surfaces can be realized without arranging the conductive terminals on the front and back surfaces, the structure and the manufacturing process can be simplified, and raw materials can be saved.

Furthermore, the first conductive terminal comprises a terminal body and a folded part, and the joint of the terminal body and the folded part is in a U-shaped structure.

Furthermore, the conductive terminal group further comprises a second conductive terminal and a third conductive terminal, the first conductive terminal, the second conductive terminal and the third conductive terminal are arranged side by side, the first conductive terminal is arranged at two sides, and the second conductive terminal and the third conductive terminal are arranged in the middle.

Furthermore, the front ends of the second conductive terminal and the third conductive terminal are both arc-shaped structures in the vertical direction, and the arc-shaped structures of the second conductive terminal and the third conductive terminal are opposite in direction. Through the arrangement, the front ends of the second conductive terminal and the third conductive terminal are respectively arranged on the front side and the back side, so that the function that the front side and the back side can be contacted in a certain sequence and time sequence by being randomly spliced is achieved.

Furthermore, a conductive terminal fixing plate is further arranged on the connector main body, a conductive terminal mounting position is arranged on the conductive terminal fixing plate, the conductive terminal group is fixed on the conductive terminal mounting position, and the conductive terminal group and the conductive terminal fixing plate are formed in an injection molding mode.

Further, all be provided with the boss on terminal body and the inflection portion, still set up on the conductive terminal installation position with the recess of boss looks adaptation, the boss joint is in the recess.

Furthermore, welding pins are arranged at the tail ends of the first conductive terminal, the second conductive terminal and the third conductive terminal, welding pads are connected to the welding pins, a PCB is further arranged on the connector body, the welding pads are welded on the PCB, and the first conductive terminal, the second conductive terminal and the third conductive terminal are all connected to the PCB through the welding pads.

Furthermore, the connector main body is also provided with a middle clamping piece, and the middle clamping piece is stacked above the conductive terminal fixing plate.

Furthermore, the connector main body, the middle clamping piece, the conductive terminal group and the conductive terminal fixing plate are formed in an injection molding mode.

Further, still be provided with the spacing groove in the connector main part, the PCB board is provided with the stopper, the stopper joint is at the spacing inslot.

Furthermore, the contact surface of the connector main body and the PCB is provided with guide blocks which are opposite up and down, a guide groove is formed between the guide blocks, and the contact end of the PCB and the connector main body is arranged in the guide groove.

Furthermore, clamping grooves are formed in two sides of the shell, and two sides of the PCB are clamped in the clamping grooves.

The invention provides a manufacturing method of an electric connector, which comprises the following steps:

s1: preparation of a conductive terminal group: manufacturing a conductive terminal group with double-sided conductive function by using a high-speed cold stamping process;

s2: one-time injection molding: performing primary in-mold injection molding on the conductive terminal group in the S1;

s3: and (3) secondary injection molding: putting the semi-finished product subjected to the primary injection molding of S2 into the middle clamping piece, and performing secondary injection molding;

s4: and (3) testing: removing waste belts and testing the product subjected to the secondary injection molding in the step S3, and repairing defective products;

s5: installing a shell;

s6: and (6) installing the PCB.

Further, the high-speed cold stamping process in S1 includes the steps of punching, guiding, cutting, bending, shaping, and the like, the production speed of the punch press depends on different types and conditions, the used material includes highly conductive copper alloy, and the stamping speed is 320 times/minute and 480 times/minute.

Further, before the one-time injection molding in S2, the conductive terminal group is plated to enhance conductivity, prevent corrosion and oxidation, enhance solderability of tin, and the plated conductive terminal group is placed in a plastic mold for the first-time injection molding. The mold for one-time injection molding is carried out by adopting one-mold multi-cavity double-discharge, a front row and a rear row are arranged in the mold, 8-24 cavities are arranged in each row, an automatic feeding mode and an automatic material receiving mode are adopted, injection molding materials comprise high-quality engineering plastics with high temperature resistance, corrosion resistance and friction resistance, the injection molding temperature is above 330 ℃, the molding injection molding period is not less than 10 seconds, and the injection molding devices comprise vertical or horizontal plastic molding injection molding machines, so that efficient unmanned production operation can be realized.

Furthermore, in the step S3, the semi-finished product of the one-time injection molding in the step S2 is placed into the middle clip sheet metal part, and is placed into another plastic mold cavity together for the second injection molding, the mold structure, the material injection molding machine model and the molding temperature of the second injection molding are the same as those of the one-time injection molding, the molding and injection cycle of the second injection molding is 12 seconds, and the two-time injection molding and the one-time molding are completely fused into a whole.

Further, the tests in S4 include, but are not limited to, a circuit conduction test, a short circuit test, a high voltage resistance test, an appearance test of a contact surface of a front and a back conductive terminals by using an image recognition and detection system (CCD), a coplanarity test of a terminal leg portion, and a repair of a defective portion.

Further, the test in S4 and the casing in S5 are all completed by using an automatic assembling device. The method comprises the following specific steps in sequence: feeding a secondary forming product, removing a middle clamping piece waste material belt, detecting whether impurities exist on a conductive surface of a conductive terminal by a front CCD (charge coupled device), conducting, short-circuiting, breaking and pressure-resistant testing, assembling a shell, pushing the shell in place, removing the terminal waste material belt, detecting the flatness of a soldering tin pin by the CCD, and packaging the product. Can realize unmanned automatic production operation, and the production speed is more than 3000 per hour.

Further, the connector body is formed by the secondary injection molding in S3, and a guide groove and a position-limiting groove are formed in the connector body, and the guide groove and the position-limiting groove are formed by the secondary in-mold molding of the PCB in S6; and clamping grooves are formed in two sides of the shell in the S5, the PCB is clamped into the clamping grooves in the two sides of the shell in the S6, and the shell, the conductive terminal group and the like are tightly connected to the PCB through welding.

The advantages of the invention are, compared to the prior art:

firstly, the conductive terminal group of the electric connector is provided with the conductive terminals with the structure of bending back, so that the conductive functions of the front side and the back side can be realized, the structure and the manufacturing process of the electric connector can be simplified, the raw materials are reduced, the production efficiency is improved, and the cost is saved;

secondly, the tail ends of the second conductive terminal and the third conductive terminal in the conductive terminal group are both arc-shaped structures and are opposite in orientation, the front ends of the second conductive terminal and the third conductive terminal are respectively arranged on the front side and the back side, and the front side and the back side can be randomly spliced to realize a certain sequence and time sequence contact function;

finally, the invention has simple structure, low cost and convenient use and popularization.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of the structure of the connector body of the present invention.

Fig. 3 is a schematic structural diagram of the conductive terminal set of the present invention.

Fig. 4 is a schematic structural diagram of the first conductive terminal of the present invention.

Fig. 5 is a schematic structural view of the second and third conductive terminals of the present invention.

Fig. 6 is a schematic diagram of a conductive terminal fixing plate structure according to the present invention.

Fig. 7 is a schematic view of the clip of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In order to achieve the purpose, the technical scheme of the invention is as follows:

referring to fig. 1 to 7, the present invention provides an electrical connector, which includes a housing 1 and a connector body 2, wherein the connector body 2 is installed in the housing 1. The connector main body 2 is provided with a conductive terminal group 3, the conductive terminal group 3 includes more than one first conductive terminal 31, and the front end of the first conductive terminal 31 is of a structure bent back. In the invention, the front and back surfaces of the first conductive terminal 31 have the conductive function by arranging the backward bending structure at the front end of the first conductive terminal 31, the conductive function of the front and back surfaces can be realized without arranging the conductive terminals on the front and back surfaces, the structure and the manufacturing process can be simplified, and raw materials can be saved.

The first conductive terminal 31 includes a terminal body 311 and a folded portion 312, and a connection portion between the terminal body 311 and the folded portion 312 is a U-shaped structure 313.

The conductive terminal group 3 further includes a second conductive terminal 32 and a third conductive terminal 33, the first conductive terminal 31, the second conductive terminal 32 and the third conductive terminal 33 are arranged side by side, the first conductive terminal 31 is disposed on two sides, and the second conductive terminal 32 and the third conductive terminal 33 are disposed in the middle.

The front ends of the second conductive terminal 32 and the third conductive terminal 33 are both vertical arc structures 34, and the arc structures 34 of the second conductive terminal 32 and the arc structures 34 of the third conductive terminal 33 face opposite directions. Through the arrangement, the front ends of the second conductive terminal 32 and the third conductive terminal 33 are respectively arranged on the front side and the back side, so that the function that the front side and the back side can be contacted in a certain sequence and time sequence by being randomly spliced is achieved.

The connector main body 2 is further provided with a conductive terminal fixing plate 4, the conductive terminal fixing plate 4 is provided with a conductive terminal mounting position 41, the conductive terminal group 3 is fixed on the conductive terminal mounting position 41, and the conductive terminal group 3 and the conductive terminal fixing plate 4 are formed in an injection molding mode.

The terminal body 311 and the folded portion 312 are both provided with a boss 314, the conductive terminal mounting position 41 is further provided with a groove 42 matched with the boss 314, and the boss 314 is clamped in the groove 42.

The tail ends of the first conductive terminal 31, the second conductive terminal 32 and the third conductive terminal 33 are all provided with welding pins 35, the welding pins 35 are connected with bonding pads 5, the connector body 2 is further provided with a PCB 6, the bonding pads 5 are welded on the PCB 6, and the first conductive terminal 31, the second conductive terminal 32 and the third conductive terminal 33 are all connected to the PCB 6 through the bonding pads 5.

The connector main body 2 is further provided with a middle clamping piece 7, and the middle clamping piece 7 is stacked above the conductive terminal fixing plate 4.

The connector main body 2, the middle clamping piece 7, the conductive terminal group 3 and the conductive terminal fixing plate 4 are formed by injection molding.

Still be provided with spacing groove 21 on the connector main part 2, PCB board 6 is provided with stopper 61, stopper 61 joint is in spacing groove 21.

The contact surface of the connector main body 2 and the PCB 6 is provided with guide blocks 22 which are opposite up and down, a guide groove 23 is formed between the guide blocks 22, and the contact end of the PCB 6 and the connector main body 2 is arranged in the guide groove 23.

The both sides of shell 1 still are provided with draw-in groove 11, the both sides joint of PCB board 6 is in draw-in groove 11.

The invention provides a manufacturing method of an electric connector, which comprises the following steps:

s1: preparation of a conductive terminal group: manufacturing a conductive terminal group with double-sided conductive function by using a high-speed cold stamping process;

s2: one-time injection molding: performing primary in-mold injection molding on the conductive terminal group in the S1;

s3: and (3) secondary injection molding: putting the semi-finished product subjected to the primary injection molding of S2 into the middle clamping piece, and performing secondary injection molding;

s4: and (3) testing: removing waste belts and testing the product subjected to the secondary injection molding in the step S3, and repairing defective products;

s5: installing a shell;

s6: and (6) installing the PCB.

The high-speed cold stamping process in the S1 comprises the process steps of punching material guiding, cutting, bending, shaping and the like, the production speed of the punch press is determined according to different types and conditions, the used material comprises high-conductivity copper alloy, and the stamping speed is 320 times/minute and 480 times/minute.

And (S2) electroplating the conductive terminal group before one-time injection molding to enhance the conductivity, prevent corrosion and oxidation and enhance the weldability of tin, and placing the electroplated conductive terminal group into a plastic mold for the first-time injection molding. The mold for one-time injection molding is carried out by adopting one-mold multi-cavity double-discharge, a front row and a rear row are arranged in the mold, 8-24 cavities are arranged in each row, an automatic feeding mode and an automatic material receiving mode are adopted, injection molding materials comprise high-quality engineering plastics with high temperature resistance, corrosion resistance and friction resistance, the injection molding temperature is above 330 ℃, the molding injection molding period is not less than 10 seconds, and the injection molding devices comprise vertical or horizontal plastic molding injection molding machines, so that efficient unmanned production operation can be realized.

And in the S3, the semi-finished product subjected to the one-time injection molding in the S2 is placed into a middle clamping piece sheet metal part and is placed into another plastic mold cavity together for the second injection molding, the mold structure, the material injection molding machine model and the molding temperature of the second injection molding are the same as those of the first injection molding, the molding injection molding period of the second injection molding is 12 seconds, and the second injection molding and the first injection molding are completely fused into a whole.

The test in S4 includes, but is not limited to, a circuit conduction test, a short circuit test, a high voltage resistance test, an appearance test of a contact surface of a front and a back conductive terminals by using an image recognition and detection system (CCD), a coplanarity test of a terminal leg portion, and a repair of a defective test portion.

The test in S4 and the casing in S5 are completed by adopting automatic assembly equipment. The method comprises the following specific steps in sequence: feeding a secondary forming product, removing a middle clamping piece waste material belt, detecting whether impurities exist on a conductive surface of a conductive terminal by a front CCD (charge coupled device), conducting, short-circuiting, breaking and pressure-resistant testing, assembling a shell, pushing the shell in place, removing the terminal waste material belt, detecting the flatness of a soldering tin pin by the CCD, and packaging the product. Can realize unmanned automatic production operation, and the production speed is more than 3000 per hour.

In S3, the connector body is formed by secondary injection molding, and a guide groove and a limit groove are formed in the connector body, and in S6, the guide groove and the limit groove are formed by secondary die-molding of the PCB; and clamping grooves are formed in two sides of the shell in the S5, the PCB is clamped into the clamping grooves in the two sides of the shell in the S6, and the shell, the conductive terminal group and the like are tightly connected to the PCB through welding.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.