Patent Publication Number: US-11038310-B2

Title: Reversible dual-position electric connector

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a national stage application of PCT Patent Application No. PCT/CN2018/094123, filed on Jul. 2, 2018, which claims priority to China Patent Application Ser. No. 201720781911.1, filed on Jun. 30, 2017, the content of which is incorporated herein by reference. This application is also a CIP (continuation-in-part) of pending U.S. patent application Ser. No. 16/071,613, filed on Jul. 20, 2018, and pending U.S. patent application Ser. No. 16/166,433, filed on Oct. 22, 2018, the contents of which are incorporated herein by reference. 
    
    
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The invention relates to an electrical connector, and more particularly to a bidirectional duplex electrical connector. 
     Description of the Related Art 
     At present, because the functions of various electronic products are becoming more and more powerful and handheld devices are also becoming more and more popular, the demands for signal transmission between various products or devices are increasing, wherein the signal transmission between these devices are conducted through signal interfaces. The signal interface may be, for example, an electrical connector or a complementary electrical connector docking therewith. The electrical connector is an electrical receptacle, and the complementary electrical connector is an electrical plug. 
     Before docking between the electrical plug and the electrical receptacle, the electrical plug needs to face the electrical receptacle in a correct direction so that the docking can be performed. That is, the electrical receptacle has the inserting connection orientation, which is the so-called mistake-proof function. This function is to ensure the connection interface on the electrical plug to contact the contact terminal on the electrical receptacle. However, most users do not have the habit of placing the electrical plug to face the electrical receptacle in the correct direction, and this mistake-proof function causes docking failure between the electrical plug and the electrical receptacle. Then, the user flips the electrical plug to perform the correct docking. In other words, this mistake-proof function brings troubles to the user on the contrary. 
     Therefore, a bidirectional electrical connector having a duplex docking function is available on the market and is provided with two sets of contact terminals to eliminate the inserting connection orientation of the bidirectional electrical connector. The user can dock the bidirectional electrical connector with the complementary electrical connector in either direction. However, the conventional bidirectional electrical connector has the high manufacturing cost, and the low reliability of the function. Based on this, how to make the bidirectional electrical connector have the stable reliability and decrease the cost of the electrical connector becomes the goal of the common efforts of the industries. 
     BRIEF SUMMARY OF THE INVENTION 
     A main object of the invention is to provide a bidirectional duplex electrical connector, wherein the manufacturing and assembling costs can be decreased, and the duplex docking function can be provided. 
     Another main object of the invention is to provide a bidirectional duplex electrical connector, wherein one row of four loose-pin type and female-fork type terminals are adopted as ground and power terminals so that the larger plate surface area can be obtained, wherein the four terminals have grounding contacts aligned in an up-down direction and power contacts aligned in an up-down direction. 
     To achieve the above-identified object, the invention provides a bidirectional duplex electrical connector, including: two insulation seats, wherein each of the insulation seats is integrally provided with a base portion and a docking portion, the docking portion is connected to a front end of the base portion, the docking portion is provided with a baseplate and two side plates, the base portions of the two insulation seats are stacked in an up-down direction, a connection slot is formed between the baseplates of the docking portions of the two insulation seats, the two side plates of the docking portions of the two insulation seats mutually rest against each other to form a fitting frame body, and each of inner surfaces of the two insulation seats is provided with one row of separation columns performing separation to form one row of front-to-rear extending terminal slots; two rows of first terminals formed by bending and stamping metal plate sheets, wherein the two rows of first terminals are assembled into two rows of terminal slots of the two insulation seats in the up-down direction, the first terminal is integrally provided with, from front to rear, an elastically movable portion, a fixing portion and a pin, a front section of the elastically movable portion corresponds to the docking portion and is curved and provided with a contact projecting in the up-down direction, the elastically movable portion is elastically movable up and down, a rear section of the elastically movable portion and the fixing portion are on the same level and rest against a bottom surface of the terminal slot, and a depth of the terminal slot is larger than a material thickness of the first terminal, so that the rear section of the elastically movable portion and the fixing portion fall into the terminal slot, the insulation seat is provided with a fixing structure fixing the fixing portions of the one row of first terminals, the rear sections of the elastically movable portions of the one row of first terminals still can rest against the bottom surfaces of the terminal slots to elastically move up and down, the pin extends to a rear end of the base portion and is exposed, and the contacts of the two rows of first terminals having connection points with the same circuit serial numbers are arranged reversely; one row of second terminals, which are one row of loose-pin type terminals and are formed by pressing a metal plate sheet, wherein the second terminal is integrally provided with two elastic arms, a fixing portion and a pin, the two elastic arms have a harpoon-like shape, each of the two elastic arms is provided with a contact projecting toward a middle, the two contacts are aligned in the up-down direction with a gap formed between the two contacts, the two elastic arms are elastically movable up and down in a direction parallel to a plate surface direction, the one row of second terminals are assembled, in the up-down direction, into two rows of terminal slots of the two insulation seats, and the second terminal has a vertical plate surface; and a metal housing, which covers the two insulation seats and is provided with a four-sided main housing, wherein the four-sided main housing covers the docking portions of the two insulation seats to form a docking structure, and the docking structure can be positioned with a docking electrical connector in a dual-positional and bidirectional manner. 
     The above-mentioned and other objects, advantages and features of the invention may become more apparent from the following detailed description of the preferred embodiments with reference to the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         FIG. 1  is a pictorial view showing the first embodiment of the invention. 
         FIG. 2  is a cross-sectional side view showing the first embodiment of the invention. 
         FIG. 3  is a front view showing the first embodiment of the invention. 
         FIG. 4  is a top view showing the first embodiment of the invention. 
         FIG. 5  is a cross-sectional side view showing the first embodiment of the invention (the elastically movable state of the terminal  20 ). 
         FIG. 6  is a pictorially exploded view showing to the first embodiment of the invention. 
         FIG. 7  is a pictorially exploded view showing to the first embodiment of the invention. 
         FIG. 8  is a pictorial view showing two insulation seats  10  opened according to the first embodiment of the invention. 
         FIG. 9  is a pictorial view showing the manufacturing process according to the first embodiment of the invention. 
         FIG. 10  is a pictorial view showing the manufacturing process according to the first embodiment of the invention. 
         FIG. 11  is a pictorial view showing the manufacturing process according to the first embodiment of the invention. 
         FIG. 12  is a pictorial view showing the manufacturing process according to the first embodiment of the invention. 
         FIG. 13  is a pictorial view showing the manufacturing process according to the first embodiment of the invention. 
         FIG. 14  is a pictorial view showing the manufacturing process according to the first embodiment of the invention. 
         FIG. 15  is a pictorial view showing the manufacturing process according to the first embodiment of the invention. 
         FIG. 16  is a schematic side view showing the terminal according to the first embodiment of the invention. 
         FIG. 17  is a pictorial view showing two insulation seats  10  opened according to the first modified implementation of the first embodiment of the invention. 
         FIG. 18  is a pictorial view showing two insulation seats  10  stacked according to the first modified implementation of the first embodiment of the invention. 
         FIG. 19  is a pictorially exploded view showing the second modified implementation of the first embodiment of the invention. 
         FIG. 20  is a pictorial view showing two insulation seats  10  stacked according to the first modified implementation of the first embodiment of the invention. 
         FIG. 21  is a pictorially exploded view showing the third modified implementation of the first embodiment of the invention. 
         FIG. 22  is a pictorially exploded view showing the fourth modified implementation of the first embodiment of the invention. 
         FIG. 23  is a pictorially assembled view showing the fourth modified implementation of the first embodiment of the invention. 
         FIG. 24  is a pictorially assembled view showing the fifth modified implementation of the first embodiment of the invention. 
         FIG. 25  is a pictorially exploded view showing the sixth modified implementation of the first embodiment of the invention. 
         FIG. 25A  is a pictorially exploded view showing the seventh modified implementation of the first embodiment of the invention. 
         FIG. 25B  is a partial pictorial view showing the seventh modified implementation of the first embodiment of the invention. 
         FIG. 26  is a pictorially exploded view showing the eighth modified implementation of the first embodiment of the invention. 
         FIG. 27  is a pictorially exploded view showing the ninth modified implementation of the first embodiment of the invention. 
         FIG. 28  is a pictorial view showing the manufacturing process according to the second embodiment of the invention. 
         FIG. 29  is a pictorial view showing the manufacturing process according to the second embodiment of the invention. 
         FIG. 30  is a pictorial view showing the manufacturing process according to the second embodiment of the invention. 
         FIG. 31  is a pictorial view showing the manufacturing process according to the second embodiment of the invention. 
         FIG. 32  is a pictorial view showing the manufacturing process according to the second embodiment of the invention. 
         FIG. 33  is a pictorial view showing the manufacturing process according to the second embodiment of the invention. 
         FIG. 34  is a pictorial view showing the first modified implementation of the second embodiment of the invention. 
         FIG. 35  is a pictorially exploded view showing the first modified implementation of the second embodiment of the invention. 
         FIG. 36  is a top view showing the ground member according to the first modified implementation of the second embodiment of the invention. 
         FIG. 37  is a top view showing the ground member according to the second modified implementation of the second embodiment of the invention. 
         FIG. 38  is a top view showing the ground member according to the third modified implementation of the second embodiment of the invention. 
         FIG. 39  is a pictorially exploded view showing the fourth modified implementation of the second embodiment of the invention. 
         FIG. 40  is a pictorial view showing the fifth modified implementation of the second embodiment of the invention. 
         FIG. 41  is a pictorial view showing the manufacturing process according to the third embodiment of the invention. 
         FIG. 42  is a pictorial view showing the manufacturing process according to the third embodiment of the invention. 
         FIG. 43  is a pictorial view showing the manufacturing process according to the third embodiment of the invention. 
         FIG. 44  is a pictorial view showing the manufacturing process according to the third embodiment of the invention. 
         FIG. 45  is a pictorial view showing the manufacturing process according to the third embodiment of the invention. 
         FIG. 46  is a pictorially exploded view showing the first modified implementation of the third embodiment of the invention. 
         FIG. 47  is a pictorially assembled view showing two rows of terminals according to the first modified implementation of the third embodiment of the invention. 
         FIG. 48  is a pictorially assembled view showing the first modified implementation of the third embodiment of the invention before secondary processing. 
         FIG. 49  is a pictorially assembled view showing the first modified implementation of the third embodiment of the invention after secondary processing. 
         FIG. 50  is a pictorially assembled view showing the second modified implementation of the third embodiment of the invention before secondary processing. 
         FIG. 51  is a pictorially assembled view showing the second modified implementation of the third embodiment of the invention after secondary processing. 
         FIG. 52  is a top view showing the second modified implementation of the third embodiment of the invention before secondary processing. 
         FIG. 53  is cross-sectional side view showing the implementation state of the second modified implementation of the third embodiment of the invention. 
         FIG. 54  is a front view showing the second modified implementation of the third embodiment of the invention. 
         FIG. 55  is a top view showing the fourth embodiment of the invention. 
         FIG. 56  is a cross-sectional side view showing the implementation state of the fourth embodiment of the invention. 
         FIG. 57  is a top view showing the first modified implementation of the fourth embodiment of the invention. 
         FIG. 58  is a cross-sectional side view showing the implementation state of the first modified implementation of the fourth embodiment of the invention. 
         FIG. 59  is a pictorial view showing the fifth embodiment of the invention. 
         FIG. 60  is a pictorial view showing the fifth embodiment of the invention when the outer housing is not assembled. 
         FIG. 61  is a pictorial view showing the sixth embodiment of the invention. 
         FIG. 62  is a pictorial view showing the sixth embodiment of the invention when the outer housing is not assembled. 
         FIG. 63  is a pictorial view showing the seventh embodiment of the invention. 
         FIG. 64  is a pictorial view showing the eighth embodiment of the invention. 
         FIG. 65  is a pictorial view showing to the ninth embodiment of the invention. 
         FIG. 66  is a schematic plane view showing the tenth embodiment of the invention. 
         FIG. 67  is a schematic plane view showing the eleventh embodiment of the invention. 
         FIG. 68  is a pictorially exploded view showing the twelfth embodiment of the invention. 
         FIG. 69  is a pictorially exploded view showing the thirteenth embodiment of the invention. 
         FIG. 70  is a pictorially exploded view showing the fourteenth embodiment of the invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to  FIGS. 1 to 16 , a bidirectional duplex USB TYPE-C 3.0 electrical plug according to the first embodiment of the invention includes two insulation seats  10 , two rows of contacts, a metal partition plate  30 , two ground members  40 , and a metal housing  50 . 
     The insulation seat  10  is integrally provided with a base portion  11  and a docking portion  12 . The docking portion  12  is connected to the front end of the base portion  11 . The inner surfaces of the base portions  11  of the two insulation seats are provided with connection surfaces  111  resting against each other. One of the insulation seats is provided with an engagement hole  151  engaging with an engagement column  152  of the other insulation seat. The rear section of the base portion  11  is higher than the front section thereof and the outer surface of the rear section is provided with an engagement block  113 . The docking portion  12  is provided with a baseplate  121  and two side plates  122 . The two side plates  122  are connected to left and right sides of the baseplate  121 . The front section of the inner surface of the baseplate  12  is provided with a front section surface  144 , and the rear section of the inner surface of the baseplate  12  is provided with a rear section surface  143 . The rear section surface  143  projects beyond the front section surface  144  by a height. The front section surface  144  is provided with three through holes  145 . The inner surface of the insulation seat  10  is provided with one row of separation columns  141  performing separation to form one row of front-to-rear extending terminal slots  142 . The terminal slot  142  extends from the base portion  11  to the docking portion  12 , and the terminal can be placed into the terminal slot in the up-down direction. The front section of the outer surface of the baseplate  12  is provided with a concave surface  148 , and the portions corresponding to the front of the three through holes  145  are provided with three more concave surfaces  147 , which are more concave than the three concave surfaces  148 . First sides of the base portions of the two insulation seats  20  are respectively integrally provided with two plastic material bridges  146  mutually connected together. When one insulation seat  10  is flipped by 180 degrees, the two insulation seats  20  are stacked in the up-down direction, the connection surfaces  111  of the base portions of the two insulation seats rest against each other, the front sections of the two side plates  122  of the docking portions  12  of the two insulation seats are higher and connected together, and the middle section thereof is lower and formed with an opening  124 . A connection slot  125  is formed between the inner surfaces of the baseplates  121  of the two insulation seats. 
     The two rows of contacts are shown in  FIG. 3 , wherein the upper row of contacts are represented by A, the connection points with the circuit serial numbers A 1  to A 12  sequentially arranged from right to left, the lower row of contacts are represented by B, and the connection points with the circuit serial numbers B 12  to B 1  sequentially arranged from right to left. The two rows of contacts are arranged according to the connection points with the circuit serial numbers in an equally spaced manner, and the connection points of the two rows of contacts with the same circuit serial numbers are arranged reversely. The two rows of contacts are formed on the two rows of terminals  20  and the one row of terminals  90 . The two rows of terminals  20  are two rows of first terminals, and the one row of terminals  90  are one row of first terminals. 
     The two rows of terminals  20  are assembled into the two rows of terminal slots  142  of the two insulation seats  10  in the up-down direction, and each of the rows of terminals  20  have 8 terminals, which are continuous terminals formed by bending and stamping a plate sheet. When being manufactured, the overall row of terminals are connected to a material tape and then assembled into the two insulation seats  10 , the connection points of the upper row of terminals  20  with the circuit serial numbers arranged from right to left as A 2 , A 3 , A 5 , A 6 , A 7 , A 8 , A 10 , A 11 , A 2 , A 3 , . . . , A 12  in order, and the connection points of the lower row of terminals  20  with the circuit serial numbers arranged from right to left as B 11 , B 10 , B 8 , B 7 , B 6 , B 5 , B 3 , B 2  in order. Each terminal  20  is integrally provided with an elastically movable portion  22 , a fixing portion  23  and a pin  24  from front to rear, the front section of the elastically movable portion  22  corresponds to the depression area  123  of the docking portion, and is curved and provided with a contact  221  projecting beyond the rear section surface  143  in the up-down direction. The elastically movable portion  22  is elastically movable up and down, and the rear section  223  of the elastically movable portion and the fixing portion  23  are on the same level and resting against the bottom surface of the terminal slot  142 . The depth of the terminal slot  142  is greater than the material thickness of the terminal, so that the rear section  223  of the elastically movable portion and the fixing portion  23  fall into the terminal slot  142 . Then, a fixing structure  140  is formed at the position corresponding to the fixing portion  23  by way of secondary processing and encapsulant. The fixing structure  140  covers the fixing portions  23  of the one row of terminals  20  and has a plane slightly depressed from the connection surface  111 . The pin  24  horizontally extends out of the rear end of the base portion. In addition, the front end of the front fixing portion  21  has an electroplate-free layer  25  exposing from the front end of the insulation seat  10 . 
     As shown in  FIG. 5 , when the elastically movable portions  22  of the two rows of terminals are forced to elastically move, the rear section of the elastically movable portion of the terminal horizontally rests, according to principles of mechanics, against the bottom surface of the terminal slot to have the support effect of the middle section of the elastic arm. That is, the elastically movable portion is formed with a middle section fulcrum  224 , which is supported by a terminal-slot bottom surface  1421 . That is, when the contact  221  is forced to elastically moved toward the bottom surface of the terminal slot  1421 , the rear section  223  of the elastically movable portion after the middle section fulcrum  224  is reversely elastically moved, so that the rear section  223  of the elastically movable portion exclusive of the middle-section fulcrum  224  can be partially separated from the bottom surface of the terminal slot  1421  and is curved to move elastically to form a gap GP between the bottom surface of the terminal slot  1421  of the base portion and the rear section of the elastically movable portion. Thus, the contact normal force and resilience of the terminal can be increased. 
     Referring to  FIG. 12 , the one row of terminals  90  have 4 loose-pin type female-fork terminals, the terminals  90  are formed by pressing a plate sheet, and the terminal  90  is provided with two elastic arms  92 , a fixing portion  93  and a pin  94 . The two elastic arms  92  have a harpoon-like shape. Each of the two elastic arms is provided with a contact  921  projecting toward the middle. The contacts  921  are aligned in an up-down direction with a gap formed therebetween. The two elastic arms  92  are elastically movable up and down in a direction parallel to the plate surface. The upper row of contacts  921  of the one row of terminals  90  are arranged from right to left as A 1 , A 4 , A 9  and A 12  in order. The lower row of contacts  921  of the one row of terminals  90  are arranged from right to left as B 12 , B 9 , B 4  and B 1  in order. The one row of terminals  90  are assembled into the two rows of terminal slots  142  of the two insulation seats  10  in the up-down direction. The terminal has a vertical plate surface. 
     The connection points with the circuit serial numbers according to the USB TYPE-C specified by USB Association will be explained in the following: 1 and 12 are one pair of ground terminals arranged in a left-right symmetrical manner; 4 and 9 are one pair of power terminals arranged in a left-right symmetrical manner; 2 and 3 are one pair of high differential signal terminals (TX+, TX−); 10 and 11 are the other one pair of high differential signal terminals (RX+, RX−); 6 and 7 are one pair of low differential signal terminals (D+, D−); and 5 and 8 are detection terminals, wherein the ground terminal and the power terminal have the requirement of transmitting the high current, and the other terminals do not have the requirement of transmitting the high current. Also, the grounding contacts A 1 /B 12 , A 12 /B 1  aligned in the up-down direction need to electrically connected together, and the power contacts A 4 /B 9 , A 9 /B 4  aligned in the up-down direction need to electrically connected together. So, this implementation adopts one row of four female-fork type terminals  90 , which are respectively the grounding contacts A 1 /B 12 , A 12 /B 1  aligned in the up-down direction and the power contacts A 4 /B 9 , A 9 /B 4  aligned in the up-down direction. The plate surface of the terminal  90  are vertically assembled into the terminal slot, and can be designed to have the larger area of plate surface to exceed the plate surface area of the two rows of terminals  20 . 
     The metal partition plate  30  is disposed between the two insulation seats  10  and connected to the fixing portion  40 . The metal partition plate  30  is provided with a main plate surface  31 . Each of left and right sides of the main plate surface  31  extends frontwards and is integrally provided with a resilient snap  33 , and extends backwards and is integrally provided with a horizontal pin  32 . The resilient snap  33  can correspond to the opening  124  to elastically move in the left-right direction. 
     The two ground members  40  are respectively connected to and positioned at the outer surfaces of the baseplate  121  of the docking portions  12  of the two insulation seats  10 , and the ground member  40  provided with a positioning sheet  42  and a twisting sheet  45 . The twisting sheet  45  is disposed at the middle of the positioning sheet and is curve-shaped to form a continuous U-shape in the front-to-rear direction. The twisting sheet  45  is integrally connected to and provided with three elastic sheets  41 . The three elastic sheets  41  are elastically movable up and down, and each of two of the elastic sheets  41  is formed with a U-shaped sheet body. The positioning sheet  42  and the twisting sheet  45  of the ground member  40  are placed on the concave surface  148  of the outer surface of the baseplate  121 . The three elastic sheets  41  pass through the three through holes  145  and project beyond the front section surface  144 . 
     The metal housing  50  is formed by metal pulling and extending and covers the two insulation seats  10  and rests against the two ground members  40 . The metal housing  50  is provided with a four-sided main housing  51  and a positioning portion  52 . The four-sided main housing  51  covers the docking portions  12  of the two insulation seats  10  to form a docking structure. The docking structure can be positioned with a docking electrical connector in a dual-positional and bidirectional manner. The positioning portion  52  is higher than the four-sided main housing  51  and is provided with an engagement hole  53  engaging with the engagement block  113 . 
     The method of manufacturing this embodiment will be described in the following. 
     Referring to  FIG. 9 , the two rows of terminals  20  are provided. The two rows of terminals  20  are formed by stamping the same metal sheet and are arranged adjacently and have two ends connected to a material tape  60 . The material tape  60  is provided with a sub-material tape  68  connected to the upper row of terminals. The two rows of terminals  20  have the connection points with the same circuit serial numbers arranged sequentially and in the same direction. In addition, the two insulation seats  10  are provided. The two insulation seats  10  are integrally plastic injection molded. One side of the base portion  11  of each of the two insulation seats  20  is integrally provided with a plastic material bridge  146 , and the plastic material bridges  146  are mutually connected together. 
     Referring to  FIG. 10 , the two rows of terminals  20  are then assembled into the two rows of terminal slots  142  of the two insulation seats  10  in the up-down direction. The rear sections  223  of the elastically movable portions and the fixing portions  23  of the two rows of terminals  20  are on the same level and rest against the bottom surfaces of the two rows of terminal slots  142  of the two insulation seats  10 . The depth of the terminal slot  142  is greater than the material thickness of the terminal  20 , so that the rear section  223  of the elastically movable portion and the fixing portion  23  fall into the terminal slot  142 . 
     Referring to  FIG. 11 , the encapsulant is then provided at the position corresponding to the fixing portion  23  by way of secondary processing to form the fixing structure  140 , wherein the fixing structure  140  covers the fixing portions  23  of the one row of terminals  20  and is in the form of a plane slightly depressed from the connection surface  111 . 
     Referring to  FIG. 12 , the one row of terminals  90  are then assembled onto the docking portion  12  of one row of terminal slots  142  of the insulation seat  10 , and the two ground members  40  are assembled onto the outer surfaces of the docking portions  12  of the two insulation seats  10 . At this time, the material tape  60  on the front ends of the two rows of terminals is cut off, and then the sub-material tape on the rear ends of one row of terminals  20  on the other insulation seat  10  is cut off. 
     Referring to  FIG. 13 , the metal partition plate  30  is provided and placed on the fixing structure  140  of one insulation seat  10 . 
     Referring to  FIG. 14 , the insulation seat  10  is then separated from the material tape flipped by 180 degrees and stacked over the other insulation seat  10 , and the two insulation seats  20  are stacked in the up-down direction. At this time, two rows of terminals  20  having the connection points with the same circuit serial numbers are arranged reversely in order. 
     Referring to  FIG. 15 , the plastic material bridge  146  on one side of the two insulation seats  10  is then cut off, one side of each of the two insulation seats  10  is formed with a cut mark  147 , and finally the metal housing  50  is assembled, from front to rear, to cover and be fixed to the two insulation seats  10 . 
     Furthermore, the fixing structures of the two insulation seats  20  for fixing the terminals  20  may also lock the terminals by hot melting the separation columns between the terminal slot  142 , or the terminal slot  142  is provided with the slot structure. When the terminal is placed into the terminal slot in the up-down direction and then shifted in a front-rear direction, the slot structure can lock the fixing portion of the terminal. 
     Referring to  FIG. 16 , when the two rows of terminals  20  are assemble with the terminal slots  142 , the elastically movable portion  22  has the resilient overpressure toward the bottom surface of the terminal slot  1421  to ensure the two rows of terminals  20  to have the consistent elastic movement heights when being assembled with the terminal slots  142 . That is, each row of contacts  221  can have a uniform height. 
     According to the structural explanation, the invention has the following advantages. 
     First, because the rear sections  223  of the elastically movable portions and the fixing portions  23  of two rows of terminals are on the same level and rest against the bottom surfaces of the terminal slots, easy assembling can be achieved and stamping can be simplified, the manufacturing cost can be decreased, and the rear section of the elastically movable portion of the terminal horizontally rests against the bottom surface of the terminal slot so that the support effect of the middle section of the elastic arm can be obtained, thereby increasing the normal force of contacting the terminal and the resilience. 
     Second, two plastic seats  10  are integrally formed by way of plastic injection molding and are integrally connected together via the plastic material bridge  146 , so that the assembling speed is doubled. 
     Third, the ground terminal and the power terminal have the requirements of transmitting the high current. In the design of this embodiment, one row of four loose-pin type female-fork type terminals  90  are adopted, so that the larger plate surface area can be obtained and the 4 terminals  90  are respectively the grounding contacts A 1 /B 12 , A 12 /B 1  aligned in the up-down direction and the power contacts A 4 /B 9 , A 9 /B 4  aligned in the up-down direction. 
     Fourth, when the two rows of terminals  20  are assemble with the terminal slots  142 , the elastically movable portion  22  has the resilient overpressure toward the bottom surface of the terminal slot  1421  to ensure the two rows of terminals  20  to have the consistent elastic movement heights when being assembled with the terminal slots  142 . That is, each row of contacts  221  can have a uniform height. 
     Referring to  FIG. 17  and  FIG. 18 , the first modified implementation of the first embodiment of the invention is substantially the same as the first embodiment except for the difference that the plastic material bridge  146  is smaller and needs not to be cut off. 
     Referring to  FIG. 19  and  FIG. 20 , the second modified implementation of the first embodiment of the invention is substantially the same as the first embodiment except for the difference that the two rows of terminals  20  of this modified implementation are cantilever arm type terminals. That is, the distal end of the elastically movable portion  22  is suspended, so that insulation films  86  can be attached to the two insulation seats  10  corresponding to the elastically movable portions  22  to prevent the elastically movable portions  22  from contacting the metal housing. 
     Referring to  FIG. 21 , the third modified implementation of the first embodiment of the invention is substantially the same as the first embodiment except for the difference that the front ends  21  of the two rows of terminals  20  of this modified implementation are fixed to the insulation seat  10 . 
     Referring to  FIG. 22  and  FIG. 23 , the fourth modified implementation of the first embodiment of the invention is substantially the same as the first embodiment except for the difference that each of the two rows of terminals  20  of this modified implementation have 12 terminals, and no female-fork type terminal is provided. The top and bottom surfaces of the metal partition plate  30  are embedded into and plastic injection molded with the fixing structures  140 , wherein the fixing structures  140  are filled into the terminal slots  142  to fix each terminal. The fixing structure  140  is an insulator, which is assembled between the two insulation seats  10  and rests against and fix the fixing portions of the two rows of terminals  20 . The top and bottom surfaces of the fixing structure  140  is provided with multiple convex surfaces  1401  and multiple concave surfaces  1402 , which are spaced apart, respectively. The multiple convex surfaces  1401  can extend into the two rows of terminal slots  142  to fix the fixing portion of each terminal. 
     Referring to  FIG. 24 , the fifth modified implementation of the first embodiment of the invention is substantially the same as the fourth modified implementation except for the difference that the fixing structure  140  is an insulation film. 
     Referring to  FIG. 25 , the sixth modified implementation of the first embodiment of the invention is substantially the same as the first embodiment except for the difference that the front ends of the two insulation seats  10  are provided with another plastic material bridge  149 , the material tape  60  is provided with two material bridges  66  connected to two side terminals of the two rows of terminals  20 , and the pins  24  of the two rows of terminals  20  are further connected to a sub-material tape  68 . 
     Referring to  FIG. 25A , the seventh modified implementation of the first embodiment of the invention is substantially the same as the first embodiment except for the difference that two sides of each of the contacts  921  of one row of terminals  90  of this modified implementation are provided with chamfers  927 , so that the area of the contact  921  is decreased to satisfy that specified by USB Association. 
     Referring to  FIG. 25B , two sides of each of the contacts  921  of the one row of terminals  90  may also have thinned structures  928 , so that the area of the contact  921  is decreased to satisfy that specified by USB Association. 
     Referring to  FIG. 26 , the eighth modified implementation of the first embodiment of the invention is substantially the same as the fourth and sixth modified implementations except for the difference that the front ends of the two insulation seats  10  are provided with another plastic material bridge  149 . 
     Referring to  FIG. 27 , the ninth modified implementation of the first embodiment of the invention is substantially the same as the eighth modified implementation except for the difference that this embodiment is a bidirectional duplex USB TYPE-C 2.0 electrical plug. 
     Referring to  FIGS. 28 to 33 , the second embodiment of the invention provides a bidirectional duplex USB TYPE-C 3.0 electrical plug, which is provided with two insulation seats  10 , two rows of terminals  20 , a metal partition plate  30 , two ground members  40  and a metal housing  50 , and is substantially the same as the seventh modified implementation of the first embodiment except for the difference that each of the fixing portions  23  of the two side terminals of the two rows of terminals  20  is connected to a L-shaped material sheet  201 . The four L-shaped material sheets  201  are connected to four material bridges  66  of the material tape  60 , wherein the two material bridges  66  connecting the lower row of terminals  20  have the wider widths, each of two sides of the rear end of the seat  10  thereabove is provided with one side plate  150  to function to position the width of a circuit board. 
     The method of manufacturing this embodiment will be described in the following. Referring to  FIG. 28 , the two rows of terminals  20  are provided. The two rows of terminals  20  are formed by stamping the same metal sheet and are arranged adjacently. In addition, each of the fixing portions  23  of the two side terminals of the two rows of terminals  20  is connected to a L-shaped material sheet  201 . The four L-shaped material sheets  201  are connected to four material bridges  66  of the material tape  60 . The two material bridges  66  connecting the lower row of terminals  20  have the wider width. The pins  24  of the two rows of terminals  20  are further connected to a sub-material tape  68 . The sub-material tape  68  is separated from the material tape  60  and disposed within the material tape  60 . The two rows of terminals  20  have the connection points with the same circuit serial numbers arranged sequentially and in the same direction. In addition, the two insulation seats  10  are provided. The two insulation seats  10  are integrally plastic injection molded. Front and rear sections of one side of the base portion  11  of each of the two insulation seats  20  are integrally provided with plastic material bridges  146  and  149  mutually connected together. 
     Referring to  FIG. 29 , the two rows of terminals  20  are then assembled into the two rows of terminal slots  142  of the two insulation seats  10  in the up-down direction. The rear sections  223  of the elastically movable portions and the fixing portions  23  of the two rows of terminals  20  are on the same level and rest against the bottom surfaces of the two rows of terminal slots  142  of the two insulation seats  10 . The depth of the terminal slot  142  is greater than the material thickness of the terminal  20 , so that the rear section  223  of the elastically movable portion and the fixing portion  23  fall into the terminal slot  142 . The encapsulant is then provided at the position corresponding to the fixing portion  23  by way of secondary processing to form the fixing structure  140 , wherein the fixing portion  140  covers the fixing portions  23  of the one row of terminals  20  and is in the form of a plane slightly depressed from the connection surface  111 . 
     Referring to  FIG. 30 , the metal partition plate  30  is then provided and placed on the fixing structure  140  of one insulation seat  10 , the material tape  60  on the front ends of the two rows of terminals is cut off, and the two sub-material tapes  60  and the two narrower material bridges  66  are cut off. At this time, the two insulation seats  10  are connected to the material tape  60  only through the two wider material bridges  66 . 
     Referring to  FIG. 31 , the insulation seat  10  is then separated from the material tape flipped by 180 degrees and stacked over the other insulation seat  10 , and the two insulation seats  10  are stacked in an up-down direction. At this time, two rows of terminals  20  having the connection points with the same circuit serial numbers are arranged reversely in order. 
     Referring to  FIG. 32 , the plastic material bridges  146  and  149  on one side of the two insulation seats  10  are then cut off, and one side of each of the two insulation seats  10  is formed with a cut mark  147 . At this time, two grounding sheets  40  are assembled on the front sections of the two insulation seats  10 . 
     Referring to  FIG. 33 , the metal housing  50  is assembled, from front to rear, to cover and be fixed to the two insulation seats  10 , and finally the two material tapes  66  are cut off. 
     Referring to  FIGS. 34 to 36 , the first modified implementation of the second embodiment of the invention is substantially the same as the second embodiment except for the difference that each of the outer surfaces of the two insulation seats  10  is provided with, from front to rear, a concave surface  147 , a concave surface  148  and an engagement block  153 . The concave surfaces  147  are more concave than the concave surface  148  and disposed on the front and two sides of the three through holes  145 , the concave surface  148  is disposed on the rear section of the insulation seat  10 , the concave surface  148  is provided with two side portions  1481  extending frontwards, the two side portions  1481  are disposed on the arced portions of two sides of the insulation seat  10  and connected to the concave surfaces  147 , and the engagement block  153  is disposed on the rear section of the concave surface  148 . 
     Each of the two ground members  40  is provided with a positioning sheet  42  and a twisting sheet  45  and three elastic sheets  41 , the positioning sheet  42  is connected to and positioned at the concave surface  148  to form a substantial flush structure, the positioning sheet  42  is provided with a locking hole  424  and two resting elastic sheets  426 , the locking hole  424  is a longitudinal hole extending in the left-right direction, the front end of the locking hole  424  is provided with a resilient member  425 , the locking hole  424  can resiliently lock with the engagement block  153  through the resilient member  425 , the two resting elastic sheets  426  projecting in the up-down direction can rest against the metal housing, two sides of the positioning sheet  42  extend frontward and are provided with two side portions  421 , the front ends of the two side portions  421  are connected to the twisting sheet  45 , the two side portions  421  and the twisting sheet  45  form a hollow region  422 , the two side portions  421  are connected to the two side portions  1481  in an arced-surface-like manner, the twisting sheet  45  is placed on the concave surface  147 , the thickness of the twisting sheet  45  is smaller than the depth of the concave surface  147 , and the three elastic sheets  41  are connected to the twisting sheet  45  and extend backwards. The three elastic sheets  41  and the twisting sheet  45  are in the form of a plate sheet extending in an integrally continuous curved manner, so the three elastic sheets  41  are inverse-U shaped and project beyond the three openings  145  in the up-down direction. The concave surface  147  is more concave than the concave surface  148 . So, after the two insulation seats  10  are fitted with the metal housing  50 , the twisting sheet  45  can twist in the twisting gap of the concave surface  147 , so that the resilience of the three elastic sheets  41  can be increased. 
     Referring to  FIG. 37 , the second modified implementation of the second embodiment of the invention is substantially the same as the first modified implementation of the second embodiment except for the difference that the three elastic sheets  41  of the ground member  40  are not inverse-U shaped. 
     Referring to  FIG. 38 , the third modified implementation of the second embodiment of the invention is substantially the same as the second modified implementation of the second embodiment except for the difference that the twisting sheet  45  of the ground member  40  is provided with two inverse-U shaped structures respectively disposed between two elastic sheets  41 . 
     Referring to  FIG. 39 , the fourth modified implementation of the second embodiment of the invention is substantially the same as the first modified implementation of the second embodiment except for the difference that two side portions  421  of the positioning sheet  42  of the ground member  40  are disposed on the inner side and in the forms of planes. 
     Referring to  FIG. 40 , the fifth modified implementation of the second embodiment of the invention is substantially the same as the fourth modified implementation of the second embodiment except for the difference that the ground member  40  only has two elastic sheets  41 . 
     Referring to  FIGS. 41 to 45  according to the third embodiment of the invention, this embodiment is a bidirectional duplex USB TYPE-C 2.0 electrical plug is substantially the same as the second embodiment except for the difference that the upper row of terminals  20  of this implementation have seven terminals A 1 , A 4 , A 5 , A 6 , A 7 , A 9  and A 12 , and the lower row of terminals  20  have five terminals B 1 , B 4 , A 5 , B 9  and B 12 . 
     The manufacturing method of this embodiment is substantially the same as the second embodiment except for the difference that this embodiment has no ground member, and the pins  24  of the upper and lower terminals  20  are in the form of one horizontal row of members flush with each other, wherein the pins  24  of the four pairs of terminals A 1 /B 12 , A 4 /B 9 , A 9 /B 4  and A 11 /B 1  are in an horizontal equal-height and parallel manner or adjacent and close to each other. 
     Referring to  FIGS. 46 to 49  showing the first modified implementation of the third embodiment of the invention, this embodiment is a bidirectional duplex USB TYPE-C 2.0 electrical plug is substantially the same as the third embodiment except for the difference that the base portion  11  of the lower insulation seat  10  of this embodiment extends backwards and projects to form a bonding plate  114  as compared with the base portion of the upper insulation seat  10 , wherein the bonding plate  114  is provided with one row of pin slots  115  and two U-shaped slots  116 ; the pins  24  of one pair of power terminals B 4 /B 9  of the lower row of terminals  20  are integrally connected to a U-shaped connection sheet  208 , the pins  24  of the one pair of ground terminals B 1 /B 12  are integrally connected to a U-shaped connection sheet  208 , the two U-shaped connection sheets  208  extend backwards and bypass the pin of the middle terminal and are in the form of a large U shape covering a small U shape, and the two U-shaped connection sheets  208  and the pins of the lower row of terminals have a height difference; and the pins  24  of the one pair of power terminals A 4 /A 9  of the upper row of terminals  20  are integrally connected to a U-shaped connection sheet  208 , the pins  24  of the one pair of ground terminals B 1 /B 12  are integrally connected to a U-shaped connection sheet  208 , the two U-shaped connection sheets  208  extend backwards and bypass the pin of the middle terminal and are in the form of a large U shape covering a small U shape, and the two U-shaped connection sheets  208  and the pins of the upper row of terminals have a height difference. 
     Referring to  FIG. 47  and  FIG. 48 , when the two insulation seats  10  are stacked in an up-down direction, the pins  24  of the two rows of terminals are in flat surface contact with and arranged in the one row of pin slots  115 , wherein A 1  and B 12  aligned in an up-down direction are ground terminals, A 12  and B 1  are ground terminals, and A 4  and B 9  are power terminals. So, the pins  23  of the four pairs of terminals are stacked in an up-down direction and are arranged in the pin slots  115  of the bonding plate  114 , and the two pairs of U-shaped connection sheets  208  of the two rows of terminals  20  are stacked and fall into the two U-shaped slots  116 . In order to prevent the two pairs of stacked U-shaped connection sheets  208  from being exposed, the secondary processing is again performed to hot-melt several bumps  119  to form a cover surface  120  covering the pins  24  of the two U-shaped slots  116  and A 4  and A 12 , as shown in  FIG. 49 , and only the six pins  24  of A 1 , A 5 , A 6 , A 7 , B 5  and A 9  are left. In addition, the plate surface of the pin  24  of A 1  is provided with a through hole  246 , and the pin  32  of the metal partition plate  30  is connected to the through hole  246 . 
     Referring to  FIGS. 50 to 54  showing the second modified implementation of the third embodiment of the invention, this embodiment provides a bidirectional duplex USB TYPE-C 3.0 electrical plug substantially the same as the first modified implementation of the third embodiment except for the difference that: this embodiment is additionally provided with two pairs of high differential signal terminals, that is, the upper row of terminals are added with A 2  and A 3 , the lower row of terminals are added with B 10  and B 11 , wherein the pins  24  of A 2  and A 3  are bent upward reversely to horizontally extend frontwards to staggered with the pins  24  of B 10  and B 11 . In addition, B 5  is removed from the lower row of terminals, and A 4  and A 5  of the upper row of terminals are bonded to a resistor for electrically connection, wherein A 5  has no output pin, so that eight pins  24  of A 1 , B 11 , B 10 , A 2 , A 3 , A 6 , A 7  and A 9  are provided in this embodiment. 
     Referring to  FIGS. 55 and 56  according to the fourth embodiment of the invention, this embodiment provides a bidirectional duplex USB TYPE-C 3.0 electrical plug substantially the same as the first and second embodiments except for the difference that, in this embodiment, the horizontal sections of the pins  24  of the two pairs of high differential signal terminals (B 2 /B 3 , B 10 /B 11 ) of the lower row of terminals are shorter than the horizontal sections of the pins  23  of the two pairs of high differential signal terminals (A 2 /A 3 , A 10 /A 11 ) of the upper row of terminals. This implementation is electrically connected to a circuit board  280 , which is a multi-layer board and provided with a metal layer  283 . The bonding pads bonded to the pins  24  of the two pairs of high differential signal terminals (B 2 /B 3 , B 10 /B 11 ) of the lower row of terminals are electrically connected to the other surface of the circuit board through vias  284 , so that the two pairs of high differential signal terminals (B 2 /B 3 , B 10 /B 11 ) and the two pairs of high differential signal terminals (A 2 /A 3 , A 10 /A 11 ) respectively perform transmissions of the circuits on two sides of the circuit board  280 , and the separation of the metal layer  283  can decrease the electromagnetic interference. 
     Referring to  FIGS. 57 and 58  showing the first modified implementation of the fourth embodiment of the invention, this embodiment provides a bidirectional duplex USB TYPE-C 3.0 electrical plug substantially the same as the first modified implementation of the fourth embodiment except for the difference that, in this embodiment, the horizontal sections of the pins  24  of only one pair of high differential signal terminals (B 10 /B 11 ) of the lower row of terminals are shorter than the horizontal sections of the pins  23  of only one pair of high differential signal terminals (A 2 /A 3 ) of the upper row of terminals. 
     Referring to  FIGS. 59 and 60  according to the fifth embodiment of the invention, this embodiment provides a flash drive  500  having the electrical connector of the invention. The flash drive  500  includes an outer housing  230 , a circuit board  240 , an electronic device  250  and an electrical connector  3 . 
     The circuit board  240  is provided with multiple electroconductive connection points and multiple printed circuits (not shown). 
     The electronic device  250  is electrically connected to the circuit board  240 . The electronic device  250  includes an electronic unit  251 , a control chip  252  and a circuit safety protection device  253 . The electronic unit  251  is the main configuration of the electronic device  250 , and is a storage unit, which may be a memory, in this embodiment. 
     The control chip  252  controls the operation of the electronic unit  251 . The circuit safety protection device  253  includes multiple circuit safety protection elements, such as the power safety control chip, anti-over-current element, anti-over-voltage element, anti-short-circuit element, resistor, capacitor and the like. the power safety control chip can provide the following protection including the input high-voltage protection, input anti-reverse protection, output over-current protection, output over-voltage protection, output short-circuit protection, battery over-charge and over-discharge protection, battery PTC protection and charge/discharge temperature protection. 
     The electrical connector  3  is a bidirectional duplex USB TYPE-C 2.0/3.0/3.1 electrical plug having the structure the same as that of each of the first to fourth embodiments. The electrical connector  3  is electrically connected to the circuit board  240  and electrically connected to the electronic device  250 . 
     The outer housing  230  covers the circuit board  240 , the electronic device  250 , and the rear section of the electrical connector  3 . The front section of the electrical connector  3  and the insert port  551  of the connection slot are exposed from the outer housing  230 . 
     Referring to  FIGS. 61 and 62  according to the sixth embodiment of the invention, this embodiment provides a card reader  501  having the electrical connector of the invention and including an outer housing  230 , a circuit board  240 , an electronic device  250 , and an electrical connector  3 , and is substantially the same as the fifth embodiment, and detailed descriptions thereof will be omitted. The main difference resides in that the electronic unit of the electronic device  250  is an electronic combination of the card reader. 
     Referring to  FIG. 63  according to the seventh embodiment of the invention, this embodiment provides an adapted electrical connector  502  having the electrical connector of the invention and including an adapter circuit, a first electrical connector  1 , a second electrical connector  2  and an outer housing  230 , wherein the adapter circuit is disposed on a circuit board  240 , the first electrical connector  1  is disposed on one side of the circuit board  240 , the second electrical connector  2  is disposed on the other side of the circuit board  240 , one end of the adapter circuit is electrically connected to the first electrical connector  1 , and the other end of the adapter circuit is electrically connected to the second electrical connector  2 . Using the adapter circuit can adapt a first electrical connector  1  to three second electrical connectors  2 , wherein the first electrical connector  1  is a USB A-type 2.0/3.0/3.1 connector, and the second electrical connector  2  is a bidirectional duplex USB TYPE-C 2.0/3.0/3.1 electrical plug having the structure the same as the structure of each of the first to fourth embodiments. The outer housing  230  covers the circuit board  240 , the insert ports of the connection slots of the first electrical connector  1  and the second electrical connector  2  are exposed from the outer housing  230 . 
     In addition, the circuit board  240  is electrically connected to and provided with an electronic device  250 , the electronic device  250  includes an electronic unit, a control chip and a circuit safety protection device, the electronic unit is an electronic combination of an adapter device, and the electronic unit can perform switching and adapting on different interfaces, so that the first electrical connector  1  and the second electrical connector  2  having different interfaces can perform mutual adapting. The control chip controls the operation of the electronic unit. The circuit safety protection device includes multiple circuit safety protection elements, such as the power safety control chip, anti-over-current element, anti-over-voltage element, anti-short-circuit element, resistor, capacitor and the like. 
     Referring to  FIG. 64  according to the eighth embodiment of the invention, this embodiment provides an adapted electrical connector  503  having the electrical connector of the invention and is substantially the same as the seventh embodiment except for the difference that the first electrical connector  1  of this embodiment is a USB A-type 2.0/3.0/3.1 socket. 
     Referring to  FIG. 65  according to the ninth embodiment of the invention, this embodiment provides an adapted electrical connector  504  having the electrical connector of the invention and including an adapter circuit, a first electrical connector  1  and a second electrical connector  2 , wherein the adapter circuit is an electrical connection cable  260 , one end of the adapter circuit is electrically connected to the first electrical connector  1 , and the end of the adapter circuit is electrically connected to the two second electrical connectors  2 . Using the adapter circuit can adapt a first electrical connector  1  to two second electrical connectors  2 , wherein the first electrical connector  1  is a USB A-type 2.0/3.0/3.1 connector, the two second electrical connectors  2  are bidirectional duplex USB TYPE-C 2.0/3.0/3.1 electrical plugs each having the structure the same as the structure of each of the first to fifth embodiments. 
     Referring to  FIG. 66  according to the tenth embodiment of the invention, this embodiment provides an adapted electrical connector  505  having the electrical connector of the invention, and is substantially the same as the ninth embodiment except for the difference that the second electrical connector  2  of this embodiment is a bidirectional duplex USB TYPE-C 2.0/3.0/3.1 electrical plug having the structure the same as the structure of each of the first to fourth embodiments. The first electrical connector  1  may be the D-SUB connector or socket, HDMI, Display Port, eSATA, RJ connector, network cable connector, memory card seat (e.g., SD memory card seat), chip smart card seat, or various electronic connectors or sockets. 
     Referring to  FIG. 67  according to the eleventh embodiment of the invention, this embodiment provides an adapted electrical connector  506  having the electrical connector of the invention and is substantially the same as the seventh embodiment except for the difference that the second electrical connector  2  of this embodiment is a bidirectional duplex USB TYPE-C 2.0/3.0/3.1 electrical plug having the structure the same as the structure of each of the first to fourth embodiments. The first electrical connector  1  may be the D-SUB connector or socket, HDMI, Display Port, eSATA, RJ connector, network cable connector, memory card seat (e.g., SD memory card seat), chip smart card seat, or various electronic connectors or sockets. 
     Referring to  FIG. 68  according to the twelfth embodiment of the invention, this embodiment provides a bidirectional duplex USB TYPE-C 2.0 electrical plug substantially the same as the first modified implementation of the third embodiment and the fourth modified implementation of the first embodiment. Similarly, this embodiment has the top and bottom surfaces of the metal partition plate  30  embedded into and plastic injection molded with the fixing structure  140 , wherein the fixing structure  140  is filled into the terminal slots  142  to fix each terminal. 
     Referring to  FIG. 69  according to the thirteenth embodiment of the invention is substantially the same as the twelfth embodiment. This embodiment is not provided with the metal partition plate, and the left and right sides of the metal housing  50  are integrally provided with inwardly projecting resilient snaps  56 , wherein the plastic molded fixing structure  140  can be filled into the two rows of terminal slots  142  of the two insulation seats  10  to fix each terminal. 
     Referring to  FIG. 70  according to the fourteenth embodiment of the invention is substantially the same as the first embodiment. Similarly, the top and bottom surfaces of the metal partition plate  30  of this embodiment are embedded into and plastic injection molded with the fixing structures  140 , and the fixing structures  140  are filled into the terminal slots  142  to fix each terminal. 
     In addition, the connector plug of each embodiment of the invention may also be disposed in various types of apparatuses and connected to various types of apparatuses. The apparatus may be, for example, an adapter cable, an adapter, an adapter device, a mouse, a keyboard, a power supply, a mouse, an earphone, a casing, a peripheral accessory product, a flash drive, a USB stick, a mobile hard drive, various storage apparatuses or instruments, a mobile power, a power bank, a charger, a wall charger, an expansion block, an expander, a notebook computer, a tablet computer, a mobile phone, various projection apparatus products, various wireless chargers, various wireless apparatus products, a setup box, a server, a desktop computer, various motion portable electronic apparatuses and instruments, a television, a playstation, various gaming apparatus products, various video apparatus products, various earphones, a microphone, a loudspeaker, various electronic lamp illuminating apparatus products, various electric fan apparatuses, various electronic elements, various ARs, a VR electronic apparatus product, or various other applicable electronic apparatus products. 
     In addition, because the bidirectional duplex connector of the invention has two contact interfaces, it may also use an anti-over-voltage, anti-overload current, anti-overheating, anti-short-circuit or anti-backflow element, such as a Schottky diode, a resistor, an allergy resistor, a capacitor or a magnetic bead, to function as the circuit safety protection. However, there may also be various implementations, such as the Schottky diode for anti-short-circuit; a resistor, an allergy resistor, a capacitor, a magnetic beads for anti-over-voltage, anti-overload current, anti-overheating; or an anti-backflow electrical element, an anti-short-circuit electrical element, a circuit safety protection element, or a safety circuit configuration means to achieve the circuit safety protection effect. In order to facilitate the examination, it is to be noted that claims  1 - 3  and  5 - 8  are implemented in  FIGS. 1-16 , claims  13 - 15  are implemented in  FIGS. 22-23 , and claims  10  and  16 - 18  are implemented in  FIGS. 46-49 . 
     The specific embodiments set forth in the detailed description of the preferred embodiments are merely illustrative of the technical details of the invention, and are not intended to limit the scope of the invention to the embodiments. Various modifications can be made without departing from the spirit of the invention and the following claims.