Patent Publication Number: US-2022216643-A1

Title: Waterproof socket connector

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present application is based on, and claims priority from, China Patent Application No. 202120026450.3, filed Jan. 6, 2021, the disclosure of which is hereby incorporated by reference herein in its entirety. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention generally relates to a waterproof socket connector, and more particularly to a waterproof socket connector which has a waterproof function and is easy to be assembled with an electronic device. 
     2. The Related Art 
     Referring to  FIG. 15 , a charging circuit that complies with a criterion of a USB (Universal Serial Bus) Type C sink configuration channel functional model, the charging circuit has a connection end. The connection end is equipped with a first conductive terminal, a first ground terminal and two detection terminals. The first conductive terminal, the first ground terminal and the two detection terminals are connected to a resistance for monitoring a working mode of a plug connector. The working mode of the plug connector is a signal mode, a power mode or a fast charging mode. 
     A conventional socket connector includes a plurality of contact elements. 
     The conventional socket connector is used to an electronic product. The electronic product includes a second conductive terminal and a second ground terminal. When the conventional socket connector is assembled to the electronic product, the plurality of the contact elements of the conventional socket connector need soldering with the second conductive terminal and the second ground terminal of the electronic product, and then the conventional socket connector and the electronic product is usable. However, the electronic product requires a waterproof performance and a high sealing performance, so a soldering procedure between the electronic product and the conventional socket connector is hardly operated. As a result, the electronic product and the conventional socket connector are assembled inconveniently. 
     In view of the above-mentioned problems, if the charging circuit is integrated to the conventional socket connector, the conventional socket connector may be directly assembled into the electronic product by designing an insertion space of the electronic product, so that the conventional socket connector and the electronic product have no need to proceed with the hard soldering operation between the conventional socket connector and the electronic product. 
     Therefore, it is necessary to provide a waterproof socket connector which has a waterproof function and is easy to be assembled with an electronic device. 
     SUMMARY OF THE INVENTION 
     An object of the present invention is to provide a waterproof socket connector. The waterproof socket connector includes an inner insulator having a tongue board, a plurality of terminals fastened in the inner insulator, at least one resistor, a conductive element, a grounding element, a shell, a sealing element and an outer insulator. The plurality of the terminals are arranged in an upper row and a lower row, respectively. The upper row of the terminals is exposed outside from an upper surface of the tongue board. The lower row of the terminals is exposed outside from a lower surface of the tongue board. A tail end of each terminal has a connecting portion, and each connecting portion projects outward from a rear surface of the inner insulator. The plurality of the terminals are a plurality of charging terminals and detection terminals. The at least one resistor is mounted to the connecting portions of the detection terminals. The conductive element is mounted behind the plurality of the terminals. Several of the charging terminals are connected to the conductive element. The grounding element is mounted behind the plurality of the terminals. The detection terminals are connected to the grounding element. Remains of the charging terminals are connected to the grounding element. A front end of the shell surrounds the inner insulator. A rear end of the shell is hollow to form an inner space between a rear end of the inner insulator and the rear end of the shell. One side of a rear edge of the shell extends rearward to form a grounding part. The grounding part is connected to the grounding element. The sealing element is filled in the inner space. The outer insulator surrounds the inner insulator, the plurality of the terminals, the shell, the sealing element, the at least one resistor, a front end of the conductive element and a front end of the grounding element. 
     Another object of the present invention is to provide a waterproof socket connector. The waterproof socket connector includes an inner insulator having a tongue board, a plurality of terminals, a circuit board, at least one resistor, a conductive element, a grounding element, a shell, a sealing element and an outer insulator. The plurality of the terminals are fastened in the inner insulator. The plurality of the terminals are arranged in an upper row and a lower row, respectively. The upper row of the terminals is exposed outside from an upper surface of the tongue board. The lower row of the terminals is exposed outside from a lower surface of the tongue board. A tail end of each terminal has a connecting portion, and each connecting portion projects outward from a rear surface of the inner insulator. The plurality of the terminals are a plurality of charging terminals and detection terminals. The circuit board is mounted to the tail ends of the plurality of the terminals, and the circuit board is connected with the connecting portions of the plurality of the terminals. The at least one resistor is fastened to the circuit board. The conductive element is mounted to a rear of the circuit board, and the conductive element is connected to the circuit board. The grounding element is mounted to the rear of the circuit board, and the grounding element is connected to the circuit board. A front end of the shell surrounds the inner insulator. A rear end of the shell is hollow to form an inner space between a rear end of the inner insulator and the rear end of the shell. The sealing element is filled in the inner space. The outer insulator surrounds the inner insulator, the plurality of the terminals, the shell, the sealing element, the circuit board, the at least one resistor, a front end of the conductive element and a front end of the grounding element. 
     Another object of the present invention is to provide a waterproof socket connector. The waterproof socket connector includes an inner insulator, a plurality of terminals, a circuit board, at least one resistor, a conductive pin, a grounding pin, a shell, a sealing element and an outer insulator. The plurality of the terminals are fastened in the inner insulator. The plurality of the terminals are arranged in an upper row and a lower row, respectively. A tail end of each terminal has a connecting portion, and each connecting portion projects outward from a rear surface of the inner insulator. The plurality of the terminals are a plurality of charging terminals and detection terminals. The at least one resistor is directly mounted to the connecting portions of the detection terminals. The conductive pin is positioned behind the plurality of the terminals. Several of the charging terminals are connected to the conductive pin. The grounding pin is positioned behind the plurality of the terminals. The detection terminals are directly connected to the grounding pin. Remains of the charging terminals are directly connected to the grounding pin. A front end of the shell surrounds the inner insulator. A rear end of the shell is hollow to form an inner space between a rear end of the inner insulator and the rear end of the shell. One side of a rear edge of the shell extends rearward to form a grounding part. The grounding part is directly connected to the grounding pin. The sealing element is filled in the inner space. The outer insulator surrounds the inner insulator, the plurality of the terminals, the shell, the sealing element, the at least one resistor, a front end of the conductive pin and a front end of the grounding pin. 
     As described above, the conductive element and the grounding element of the waterproof socket connector are connected to the at least one resistor and the plurality of the terminals of the waterproof socket connector directly or the conductive element and the grounding element are connected to the at least one resistor and the plurality of the terminals through the circuit board, so the waterproof socket connector not only has a waterproof function and a charging function, but also is easy to be assembled with an electronic device. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a waterproof socket connector in accordance with the present invention; 
         FIG. 2  is an exploded view of the waterproof socket connector in accordance with a first preferred embodiment of the present invention; 
         FIG. 3  is a perspective view of a plurality of terminals of the waterproof socket connector of  FIG. 2 ; 
         FIG. 4  is a partial assembling view of the waterproof socket connector, wherein a sealing element is without being filled in the waterproof socket connector of  FIG. 2 ; 
         FIG. 5  is a partial assembling view of the waterproof socket connector, wherein the sealing element is filled in the waterproof socket connector of  FIG. 2 ; 
         FIG. 6  is an exploded view of the waterproof socket connector in accordance with a second preferred embodiment of the present invention; 
         FIG. 7  is a partial assembling view of the waterproof socket connector, wherein the plurality of the terminals are assembled with a circuit board, a conductive element and a ground element of the waterproof socket connector of  FIG. 6 ; 
         FIG. 8  is a partial assembling view showing that the sealing element is without being filled in the waterproof socket connector of  FIG. 6 ; 
         FIG. 9  is a partial assembling view showing that the sealing element is filled in the waterproof socket connector of  FIG. 6 ; 
         FIG. 10  is a bottom view showing that an outer waterproof body is without being filled in the waterproof socket connector of  FIG. 6 ; 
         FIG. 11  is a bottom view showing that the outer waterproof body is filled in the waterproof socket connector of  FIG. 6 ; 
         FIG. 12  is an exploded view of the waterproof socket connector in accordance with a third preferred embodiment of the present invention; 
         FIG. 13  is a partial assembling view showing that the sealing element is without being filled in the waterproof socket connector of  FIG. 12 ; 
         FIG. 14  is a partial assembling view showing that the sealing element is filled in the waterproof socket connector of  FIG. 12 ; and 
         FIG. 15  is a circuit diagram of a USB Type-C sink configuration channel functional model. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to  FIG. 1  and  FIG. 2 , a waterproof socket connector  100  in accordance with the present invention is shown. The waterproof socket connector  100  includes an inner insulator  1 , a plurality of terminals  2 , a reinforcement plate  3 , a shell  4 , a sealing element  53 , at least one resistor  6 , a conductive element  71 , a grounding element  72  and an outer insulator  8 . The conductive element  71  and the grounding element  72  are shown as substantially cylinder shapes. 
     Referring to  FIG. 1  and  FIG. 2 , the waterproof socket connector  100  in accordance with a first preferred embodiment of the present invention is shown. In the first preferred embodiment, the inner insulator  1  has a base body  13 , and a tongue board  11  protruded frontward from a middle of a front surface of the base body  13 . 
     Referring to  FIG. 2  and  FIG. 3 , the plurality of the terminals  2  are fastened in the inner insulator  1 . The plurality of the terminals  2  are arranged in an upper row and a lower row, respectively. The upper row of the terminals  2  are fastened in an upper portion of the inner insulator  1 . The lower row of the terminals  2  are fastened in a lower portion of the inner insulator  1 . The upper row of the terminals  2  are exposed outside from an upper surface of the tongue board  11 . The lower row of the terminals  2  are exposed outside from a lower surface of the tongue board  11 . A tail end of each terminal  2  has a connecting portion  201  at the end of each terminal  2 , and each connecting portion  201  projects outward from a rear surface of the inner insulator  1 . 
     The waterproof socket connector  100  is mainly used for a charging purpose, so only charging terminals  21  and detection terminals  22  are retained. The waterproof socket connector  100  includes ten terminals  2  in total, and the ten terminals  2  are divided into two rows. The plurality of the terminals  2  are the ten terminals  2 . The two rows of the terminals  2  are the upper row of the terminals  2  and the lower row of the terminals  2 . Five terminals  2  are arranged in the upper row, and the other five terminals  2  are arranged in the lower row. The upper row of the terminals  2  are disposed corresponding to the lower row of the terminals  2 . The lower row of the terminals  2  are located under the upper row of the terminals  2 . The plurality of the terminals  2  are the charging terminals  21  and the detection terminals  22 . The plurality of the terminals  2  include eight charging terminals  21  and two detection terminals  22 . Each row of the terminals  2  include four charging terminals  21  and one detection terminal  22 . Each detection terminal  22  is located in a middle of the plurality of the terminals  2 , so each side of the detection terminal  22  of each row is disposed adjacent to two charging terminals  21 . 
     The reinforcement plate  3  is mounted in the inner insulator  1 , and the reinforcement plate  3  is positioned between the two rows of terminals  2  for enhancing a structure strength of the tongue board  11 . The reinforcement plate  3  is made of a stainless steel. 
     Referring to  FIG. 2  to  FIG. 4 , a front end of the shell  4  surrounds the inner insulator  1 . A rear end of the shell  4  is hollow to form an inner space  41  between a rear end of the inner insulator  1  and the rear end of the shell  4 . The connecting portions  201  of the plurality of the terminals  2  project outward of the shell  4  through the inner space  41 . 
     Referring to  FIG. 2  to  FIG. 5 , the sealing element  53  is filled in the inner space  41 . The sealing element  53  is filled in a gap  101  among the inner insulator  1 , the plurality of terminals  2  and the shell  4  for achieving a waterproof effect of the waterproof socket connector  100 . The sealing element  53  is a waterproof adhesive. 
     The at least one resistor  6  is mounted to the connecting portions  201  of the two detection terminals  22 . The at least one resistor  6  is directly mounted to the connecting portions  201  of the two detection terminals  22  together by virtue of a forming design of each detection terminal  22 . When the waterproof socket connector  100  includes two resistors  6 , the two resistors  6  are fastened to the two connecting portions  201  of the two detection terminals  22 , respectively. 
     The conductive element  71  and the grounding element  72  are mounted behind the inner insulator  1  and the plurality of the terminals  2 . The conductive element  71  is a conductive pin. The grounding element  72  is a grounding pin. The conductive element  71  and the grounding element  72  are connected to the tail ends of the plurality of the terminals  2 . Several of the charging terminals  21  are connected to the conductive element  71  which is the conductive pin. The detection terminals  22  are directly connected to the grounding element  72  which is the grounding pin. Remains of the charging terminals  21  are directly connected to the grounding element  72  which is the grounding pin. The conductive element  71  and the grounding element  72  are connected to the at least one resistor  6  and the plurality of the terminals  2  directly. The grounding pin is positioned behind the plurality of the terminals  2 . 
     Referring to  FIG. 1  to  FIG. 5 , the outer insulator  8  surrounds the inner insulator  1 , the plurality of the terminals  2 , the reinforcement plate  3 , the shell  4 , the sealing element  53 , the at least one resistor  6 , a front end of the conductive element  71  which is the conductive pin and a front end of the grounding element  72  which is the grounding pin to seal up interstices  102  among the inner insulator  1 , the plurality of the terminals  2 , the reinforcement plate  3 , the shell  4 , the sealing element  53 , the at least one resistor  6 , the front end of the conductive element  71  and the front end of the grounding element  72  for achieving the waterproof effect of the waterproof socket connector  100 . The waterproof socket connector  100  further includes a waterproof gasket  51 . The waterproof gasket  51  is mounted around a front end of the outer insulator  8 . When the waterproof socket connector  100  is assembled in an electronic device (not shown), the waterproof gasket  51  seals up an interval between the waterproof socket connector  100  and the electronic device for improving the waterproof effect of the waterproof socket connector  100 . 
     Referring to  FIG. 2 , a periphery of a front end of each of the conductive element  71  and the grounding element  72  has a blocking wall  701  protruding outward. The blocking wall  701  is shown as a ring shape, and the blocking wall  701  is fastened around the periphery of the front end of each of the conductive element  71  and the grounding element  72 . The two blocking walls  701  of the conductive element  71  and the grounding element  72  are molded in the outer insulator  8 . After the outer insulator  8  is molded to the two blocking walls  701  of the conductive element  71  and the grounding element  72 , the outer insulator  8  surrounds the blocking walls  701  of the conductive element  71  and the grounding element  72 , the two blocking walls  701  prevent the conductive element  71  and the grounding element  72  from breaking away from the outer insulator  8  so as to maintain fastening the two front ends of the conductive element  71  and the grounding element  72  in the outer insulator  8 . The two front ends of the conductive element  71  and the grounding element  72  protrude frontward to form two soldering portions  702  projecting beyond two front surfaces of the two blocking walls  701  of the conductive element  71  and the grounding element  72 . A middle of the soldering portion  702  of the grounding element  72  extends frontward to form a first extension portion  7021 . 
     Referring to  FIG. 2  to  FIG. 4 , two tail ends of the two connecting portions  201  of the two detection terminals  22  extend towards each other, and then extend sideward to a front surface of the first extension portion  7021  of the grounding element  72  to form two second extension portions  2011 . The two second extension portions  2011  are disposed corresponding to each other along an up-down direction. The two second extension portions  2011  are aligned with each other. The two second extension portions  2011  of the two detection terminals  22  are contactless. Two tail ends of the two second extension portions  2011  are both connected to the front surface of the first extension portion  7021 . The at least one resistor  6  is connected between the two second extension portions  2011 . 
     Two pairs of the innermost charging terminals  21  are VBUS (Voltage Bus) terminals. Two pairs of the outermost charging terminals  21  are grounding terminals. Tail ends of the connecting portions  201  of the two pairs of the innermost charging terminals  21  which are positioned next to the two detection terminals  22  of the two rows extend face to face. The plurality of the terminals  2  have two third extension portions  2012 . The two tail ends of the two connecting portions  201  of the two innermost charging terminals  21  of the upper row which are positioned next to two sides of the detection terminal  22  of the upper row are bent downward, and then are combined together and further extend sideward to a front surface of the soldering portion  702  of the conductive element  71  to form one third extension portion  2012 . The two tail ends of the two connecting portions  201  of the two innermost charging terminals  21  of the lower row which are positioned next to two sides of the detection terminal  22  of the lower row are bent upward, and then are combined together and further extend sideward to the front surface of the soldering portion  702  of the conductive element  71  to form the other third extension portion  2012 . Two tail ends of the two innermost charging terminals  21  of each row are combined to one of the two third extension portions  2012 . The two third extension portions  2012  are disposed corresponding to each other along the up-down direction. The two third extension portions  2012  are aligned with each other. The two third extension portions  2012  are contactless. The two third extension portions  2012  are connected to the front surface of the soldering portion  702  of the conductive element  71 . 
     Tail ends of the connecting portions  201  of the two pairs of the outermost charging terminals  21  of the two rows extend face to face. The plurality of the terminals  2  have two fourth extension portions  2013 . The two tail ends of the two connecting portions  201  of the two outermost charging terminals  21  of the upper row are bent downward, and then are combined together and further extend sideward to a front surface of the soldering portion  702  of the grounding element  72  to form one fourth extension portion  2013 . The two tail ends of the two connecting portions  201  of the two outermost charging terminals  21  of the lower row are bent upward, and then are combined together and further extend sideward to the front surface of the soldering portion  702  of the grounding element  72  to form the other fourth extension portion  2013 . Two tail ends of the two outermost charging terminals  21  of each row are combined to one of the two fourth extension portions  2013 . The two fourth extension portions  2013  are contactless. The two fourth extension portions  2013  are disposed corresponding to each other along the up-down direction. The two fourth extension portions  2013  are aligned with each other. The two fourth extension portions  2013  are connected to the front surface of the soldering portion  702  of the grounding element  72 . 
     One side of a rear edge of the shell  4  extends rearward to form a grounding part  42 . The grounding part  42  is directly connected to the grounding pin. The grounding part  42  is connected to one side of the front surface of the blocking wall  701  of the grounding element  72 , so that the grounding element  72  has a grounded effect. The grounding element  72  is grounded to meet a specification of a USB (Universal Serial Bus) Type C Sink Configuration Channel Functional Model. In the circuit diagram shown in  FIG. 15 , CC 1  which is a configuration channel is connected with a resistance RD, and CC 1  is connected with a module of connection detection and a module of USB Type-C current detection. CC 2  which is another configuration channel is connected with another resistance RD, and CC 2  is connected with the module of connection detection and the module of USB Type-C current detection. The module of connection detection is connected among VBUS (Voltage Bus), Mux CNTL (Multiplexer Controller) and PD (Power Delivery). When a USB Type-C plug (not shown) is inserted into the waterproof socket connector  100 , CC 1  and CC 2  are used for detecting a mode of the USB Type-C plug. The mode of the USB Type-C plug is a signal mode, a power mode or a PD (Power Delivery) mode. GND is defined as a ground. 
     Referring to  FIG. 1  to  FIG. 5 , specific steps of a process of manufacturing the waterproof socket connector  100  in accordance with the first preferred embodiment are described as follow. Firstly, assemble the inner insulator  1 , the terminals  2 , the reinforcement plate  3  and the shell  4 , and then solder the at least one resistor  6  to the two second extension portions  2011  manually. Then, solder the conductive element  71  to the two third extension portions  2012  manually, and solder the first extension portion  7021  of the grounding element  72  to the two second extension portions  2011  manually, solder the two fourth extension portions  2013  to the soldering portion  702  of the grounding element  72  manually, and solder the grounding part  42  to the front surface of the blocking wall  701  of the grounding element  72  manually. Later, fill the sealing element  53  into the inner space  41  by an adhesive dispensing way. At last, the outer insulator  8  is molded to the inner insulator  1 , the plurality of the terminals  2 , the reinforcement plate  3 , the shell  4 , the sealing element  53 , the at least one resistor  6 , the front end of the conductive element  71  and the front end of the grounding element  72  by means of an over molding technology, and the outer insulator  8  surrounds the inner insulator  1 , the plurality of the terminals  2 , the reinforcement plate  3 , the shell  4 , the sealing element  53 , the at least one resistor  6 , the front end of the conductive element  71  and the front end of the grounding element  72 . So the waterproof socket connector  100  completes being manufactured. 
     Referring to  FIG. 1  and  FIG. 6 , the waterproof socket connector  100  in accordance with a second preferred embodiment of the present invention is shown. In the second preferred embodiment, the waterproof socket connector  100  further includes a circuit board  9 . The at least one resistor  6  is fastened to the circuit board  9 . The tail ends of the plurality of the terminals  2  extend rearward to form the plurality of the connecting portions  201 . The circuit board  9  is mounted among the plurality of the terminals  2 , the conductive element  71  and the grounding element  72 . A circuitry arranged at the circuit board  9  is used for guiding a connection among the plurality of the terminals  2 , the conductive element  71  and the grounding element  72 , so that a complex forming way of manufacturing the plurality of the terminals  2  in accordance with the first preferred embodiment is simplified, and a simplified connecting way of the plurality of the terminals  2 , the conductive element  71  and the grounding element  72  by the circuit board  9  also meets the specification of the USB Type C Sink Configuration Channel Functional Model. 
     Referring to  FIG. 6  and  FIG. 7 , the circuit board  9  is mounted behind the inner insulator  1 . The circuit board  9  is mounted to the tail ends of the plurality of the terminals  2 , and the circuit board  9  is connected with the connecting portions  201  of the plurality of the terminals  2 . The circuit board  9  has a plurality of first perforations  91 , two second perforations  92  and at least two third perforations  93 . The plurality of the first perforations  91  penetrate through a middle of the circuit board  9 . The two second perforations  92  penetrate through two sides of the circuit board  9 . The connecting portions  201  of the plurality of the terminals  2  pass through the plurality of the first perforations  91 , and the connecting portions  201  of the plurality of the terminals  2  are soldered to the circuit board  9 . The plurality of the first perforations  91  are located between the two second perforations  92 . A middle of a front surface of each of the conductive element  71  and the grounding element  72  extends frontward to form the soldering portion  702 . The conductive element  71  and the grounding element  72  are mounted to a rear of the circuit board  9 , and the conductive element  71  and the grounding element  72  are connected to the circuit board  9 . The two soldering portions  702  of the conductive element  71  and the grounding element  72  pass through the two second perforations  92 , and the two soldering portions  702  of the conductive element  71  and the grounding element  71  are soldered to the circuit board  9 . 
     The periphery of the front end of each of the conductive element  71  and the grounding element  72  protrudes outward to form the blocking wall  701 . After the outer insulator  8  is molded to the two blocking walls  701  of the conductive element  71  and the grounding element  72 , the outer insulator  8  surrounds the two blocking walls  701  of the conductive element  71  and the grounding element  72 , the two blocking walls  701  of the conductive element  71  and the grounding element  72  prevent the conductive element  71  and the grounding element  72  breaking away from the outer insulator  8 , so that the conductive element  71  and the grounding element  72  keeps being fixed in the outer insulator  8 . 
     In the second embodiment, the waterproof socket connector  100  includes two resistors  6 . The two resistors  6  are soldered to the circuit board  9  by tin. The circuit board  9  has the circuitry (not shown). The two resistors  6  and the two detection terminals  22  are soldered to the circuit board  9 , so that the two resistors  6  are connected in series with the two detection terminals  22  respectively by the circuitry. 
     The at least two third perforations  93  penetrate through the two sides of the circuit board  9 . The at least two third perforations  93  are adjacent to two outer sides of the two second perforations  92 . Preferably, the circuit board  9  has two third perforations  93 . The plurality of the first perforations  91  and the two second perforations  92  are located between the two third perforations  93 . At least two portions of two sides of the rear end of the shell  4  extend rearward to form at least two fixing plates  43 . Preferably, the two sides of the rear end of the shell  4  extend rearward to form two fixing plates  43 . Each fixing plate  43  passes through one third perforation  93 , and each fixing plate  43  is soldered to the circuit board  9 , so that the circuit board  9  is fastened to the rear end of the shell  4 . 
     Referring to  FIG. 8  and  FIG. 10 , several portions of the rear surface of the inner insulator  1  protrude rearward to form a plurality of limiting portions  12 . The plurality of the limiting portions  12  contact with the circuit board  9 . The plurality of the limiting portions  12  abut against a front surface of the circuit board  9 . A rear surface of the shell  4  is flush with a rear surface of the sealing element  53 . The circuit board  9  is spaced from the shell  4  to form a clearance  103  between the circuit board  9  and the shell  4 . The two resistors  6  are soldered to an inner surface of the circuit board  9  by a surface mount technology. The soldering portion  702  of the conductive element  71  and the soldering portion  702  of the grounding element  72  are soldered to the inner surface of the circuit board  9  through the clearance  103 . The connecting portions  201  of the plurality of the terminals  2  are soldered to an outer surface of the circuit board  9 . 
     Referring to  FIG. 6  and  FIG. 11 , in the second preferred embodiment, the waterproof socket connector  100  further includes a waterproof element  52 . The waterproof element  52  is arranged among a rear end of the base body  13  of the inner insulator  1 , the rear surface of the sealing element  53 , the rear end of the shell  4  and the front surface of the circuit board  9 . A front surface of the waterproof element  52  abuts against the rear surface of the sealing element  53  and the rear surface of the shell  4 , and a rear surface of the waterproof element  52  abuts against the front surface of the circuit board  9 . The waterproof element  52  surrounds the rear end of the shell  4 , front ends of the connecting portions  201  of the plurality of the terminals  2 , the at least one resistor  6  and front ends of the two soldering portions  702  of the conductive element  71  and the grounding element  72 . The waterproof element  52  seals up interspaces among the rear end of the shell  4 , the rear surface of the sealing element  53 , the front ends of the connecting portions  201  of the plurality of the terminals  2 , the at least one resistor  6 , the front end of the soldering portion  702  of the conductive element  71 , the front end of the soldering portion  702  of the grounding element  72  and the circuit board  9 . An outer periphery surface of the waterproof element  52  is aligned with an outer periphery surface of the circuit board  9 . The waterproof element  52  is a curing adhesive. 
     Referring to  FIG. 6  to  FIG. 11 , specific steps of a process of manufacturing the waterproof socket connector  100  in accordance with the second preferred embodiment are described as follows. At first, assemble the inner insulator  1 , the plurality of the terminals  2 , the reinforcement plate  3  and the shell  4 , and then inject the sealing element  53  into the inner space  41  by a glue dispensing way. The waterproof socket connector  100  reaches a waterproof effect of IPX7 (International General Waterproof Grade). Then mount the connecting portions  201  of the plurality of the terminals  2  and the two soldering portions  702  of the conductive element  71  and the grounding element  72  to the circuit board  9  together with the two resistors  6  by a Dual in-Line Package Process (DIP), and solder the connecting portions  201  of the plurality of the terminals  2  and the two soldering portions  702  of the conductive element  71  and the grounding element  72  to the circuit board  9  together with the two resistors  6 , so the connecting portions  201  of the plurality of the terminals  2 , the two resistors  6 , and the two soldering portions  702  of the conductive element  71  and the grounding element  72  are connected with the circuit board  9 . 
     Later, the waterproof element  52  fills the interspaces among the rear surface of the sealing element  53 , the rear end of the shell  4 , the front ends of the connecting portions  201  of the plurality of the terminals  2 , the two resistors  6 , the front end of the soldering portion  702  of the conductive element  71 , the front end of the soldering portion  702  of the grounding element  72  and the circuit board  9 , and the waterproof element  52  further seals up the interspaces among the rear surface of the sealing element  53 , the rear end of the shell  4 , the front ends of the connecting portions  201  of the plurality of the terminals  2 , the two resistors  6 , the front end of the soldering portion  702  of the conductive element  71 , the front end of the soldering portion  702  of the grounding element  72  and the circuit board  9  to achieve the waterproof effect of the waterproof socket connector  100 . In the end, the outer insulator  8  is molded to the inner insulator  1 , the plurality of the terminals  2 , the reinforcement plate  3 , the shell  4 , the waterproof element  52 , the two resistors  6 , the circuit board  9 , the two soldering portions  702  and the two blocking walls  701  of the conductive element  71  and the grounding element  72  by means of the over molding technology, and the outer insulator  8  surrounds the inner insulator  1 , the plurality of the terminals  2 , the reinforcement plate  3 , the shell  4 , the waterproof element  52 , the sealing element  53 , the circuit board  9 , the at least one resistor  6 , the soldering portion  702  and the blocking wall  701  of the front end of the conductive element  71  and the soldering portion  702  and the blocking wall  701  of the front end of the grounding element  72 . So that the waterproof socket connector  100  completes being manufactured. 
     Referring to  FIG. 12 , the waterproof socket connector  100  in accordance with a third preferred embodiment of the present invention is shown. In the third preferred embodiment, the waterproof socket connector  100  further includes the circuit board  9 . The tail ends of the plurality of the terminals  2  extend rearward to form the plurality of the connecting portions  201 . The circuit board  9  is mounted among the plurality of the terminals  2 , the conductive element  71  and the grounding element  72 . The conductive element  71  and the grounding element  72  are connected to the at least one resistor  6  and the plurality of the terminals  2  by the circuitry of the circuit board  9 . The circuitry arranged at the circuit board  9  is used for guiding the connection among the plurality of the terminals  2 , the conductive element  71  and the grounding element  72 , so that the complex forming way of manufacturing the plurality of the terminals  2  in accordance with the first preferred embodiment is simplified, and the simplified connecting way of the plurality of the terminals  2 , the conductive element  71  and the grounding element  72  by the circuit board  9  meets the specification of the USB Type C Sink Configuration Channel Functional Model. 
     Referring to  FIG. 12  and  FIG. 13 , the periphery of the front end of each of the conductive element  71  and the grounding element  72  protrudes outward to form the blocking wall  701 . The two front ends of the conductive element  71  and the grounding element  72  protrude frontward to form two soldering portions  702  projecting beyond the two front surfaces of the two blocking walls  701 . Two middles of two front surfaces of the two front ends of the conductive element  71  and the grounding element  72  are recessed rearward to form two clamping grooves  703 . Two middles of two front surfaces of the two soldering portions  702  of the conductive element  71  and the grounding element  72  are recessed rearward to form the two clamping grooves  703 . After the outer insulator  8  is molded to the two blocking walls  701  of the conductive element  71  and the grounding element  72 , the outer insulator  8  surrounds the blocking walls  701  of the conductive element  71  and the grounding element  72 , the two blocking walls  701  prevent the conductive element  71  and the grounding element  72  from breaking away from the outer insulator  8  so as to maintain fastening the two front ends of the conductive element  71  and the grounding element  72  in the outer insulator  8 . 
     Two opposite sides of a rear end edge of the shell  4  are recessed inward to form two fixing slots  44  formed at two sides of the shell  4 . The circuit board  9  is fixed in the two fixing slots  44  of the shell  4  horizontally. One end of the circuit board  9  is clamped between the connecting portions  201  of the two rows of the terminals  2 . The connecting portions  201  of the plurality of the terminals  2  are soldered with the one end of the circuit board  9 . The other end of the circuit board  9  is exposed outside of the shell  4 . The two clamping grooves  703  of the conductive element  71  and the grounding element  72  clamp the other end of the circuit board  9 , and side walls of the two clamping grooves  703  of the conductive element  71  and the grounding element  72  are soldered to the other end of the circuit board  9 , specifically, the two soldering portions  702  of the conductive element  71  and the grounding element  72  are soldered to the other end of the circuit board  9 . 
     Several portions of the rear surface of the inner insulator  1  protrude rearward to form a plurality of positioning parts  14 . The plurality of the positioning parts  14  are arranged in two rows. The two rows of the plurality of the positioning parts  14  are arranged along the up-down direction. An upper row of the positioning parts  14  are corresponding to a lower row of the positioning parts  14 . The upper row of the positioning parts  14  cooperate with the lower row of the positioning parts  14 . When the one end of the circuit board  9  is assembled into the two fixing slots  44 , the two rows of the positioning parts  14  clamp the one end of the circuit board  9 , and the one end of the circuit board  9  is stably assembled to the rear end of the inner insulator  1  so as to proceed with a soldering operation between the plurality of the terminals  2  and the circuit board  9  conveniently. 
     Referring to  FIG. 12  to  FIG. 14 , specific steps of a process of manufacturing the waterproof socket connector  100  in accordance with the third preferred embodiment are described as follows. At first, assemble the inner insulator  1 , the plurality of the terminals  2 , the reinforcement plate  3  and the shell  4 , and assemble the circuit board  9  to the rear end of the shell  4 , after the two clamping grooves  703  of the conductive element  71  and the grounding element  72  clamp the circuit board  9 , coat solder paste to connecting positions between the connecting portions  201  of the plurality of the terminals  2  and the one end of the circuit board  9 , and coat the solder paste to connecting positions between side walls of the two clamping grooves  703  of the conductive element  71  and the grounding element  72 , and the other end of the circuit board  9 . 
     Then, the waterproof socket connector  100  proceeds with the SMT (Surface Mount Technology) procedure, the connecting positions between the connecting portions  201  of the plurality of the terminals  2  and the one end of the circuit board  9  are soldered by the SMT (Surface Mount Technology) procedure, in the same way, the connecting positions between the side walls of the two clamping grooves  703  of the conductive element  71  and the grounding element  72 , and the other end of the circuit board  9  are soldered by the SMT (Surface Mount Technology) procedure. Later, inject the sealing element  53  into the inner space  41  by the glue dispensing way to achieve the waterproof effect. 
     At last, the outer insulator  8  is molded to the inner insulator  1 , the plurality of the terminals  2 , the reinforcement plate  3 , the shell  4 , the sealing element  53 , the two resistors  6 , the circuit board  9 , the two soldering portions  702  and the two blocking walls  701  of the conductive element  71  and the grounding element  72  by means of the over molding technology, and the outer insulator  8  surrounds the inner insulator  1 , the plurality of the terminals  2 , the reinforcement plate  3 , the shell  4 , the waterproof element  52 , the two resistors  6 , the circuit board  9 , the two soldering portions  702  and the two blocking walls  701  of the conductive element  71  and the grounding element  72 . So that the waterproof socket connector  100  completes being manufactured. 
     When the waterproof socket connector  100  just needs a charging function, the plurality of the terminals  2  are integrated to the conductive element  71  and the grounding element  72  by the circuitry of the circuit board  9 . The conductive element  71  and the grounding element  72  have a positive electrode function and a negative electrode function, respectively. The USB Type-C plug has a positive electrode function requirement and a negative electrode function requirement. The USB Type-C plug is matched with the waterproof socket connector  100  to be used by a user, so that the positive electrode function requirement and the negative electrode function requirement of the USB Type-C plug are realized. The waterproof socket connector  100  reaches the waterproof effect of IPX7 (International General Waterproof Grade) by virtue of the outer insulator  8 . 
     As described above, the conductive element  71  and the grounding element  72  of the waterproof socket connector  100  are connected to the at least one resistor  6  and the plurality of the terminals  2  of the waterproof socket connector  100  directly or the conductive element  71  and the grounding element  72  are connected to the at least one resistor  6  and the plurality of the terminals  2  through the circuit board  9 , so the waterproof socket connector  100  not only has a waterproof function and the charging function, but also is easy to be assembled with the electronic device.