Patent Publication Number: US-11394153-B2

Title: Connector and terminal

Description:
RELATED APPLICATIONS 
     This application claims priority to Chinese Application No. 201910730463.6 filed on Aug. 8, 2019, which is incorporated herein by reference in its entirety. 
     TECHNICAL FIELD 
     The present disclosure relates to a connector and a terminal, particularly relates to a power connector and a terminal thereof. 
     BACKGROUND 
     Chinese Patent application No. CN201180049216.1 discloses a female-type metal terminal fitting. The female-type metal terminal fitting includes a case portion, a lance engagement portion, a spring support plate portion, a terminal biasing plate spring and a wire connection portion. 
     The case portion is a portion into which a male-type metal terminal fitting is inserted, and the case portion is formed in an angular case shape which includes a bottom plate portion, two side wall portions raised up from two side edges of the bottom plate portion and a top plate portion connecting upper ends of two side wall portions. 
     A contact portion for contacting a male-type metal terminal is formed at the bottom plate portion so as to protrude from the bottom plate portion. The lance engagement portion has a curved portion which is convex to the upper side at a portion where a lance in a connector housing is engaged so that the stiffness thereof is enhanced. The spring support plate portion is arranged so as to be laminated on an inner surface of an upper plate portion. 
     The terminal bias plate spring is formed so as to extend from the spring support plate portion to a front end side of the bottom plate portion. A front end of the terminal bias plate spring is arranged at a position opposite to the contact portion of the bottom plate portion and makes the male-type metal terminal fitting closely contact the contact portion. The wire connecting portion includes a sheath fixing piece which clamps a sheath portion of a sheathed wire and a wire pressing piece which clamps a conductive portion of the sheath wire. 
     However, the female-type metal terminal fitting does not have an arc discharge contact point and a stable front frame latching structure. In this way, when the female-type metal terminal fitting and the male-type metal terminal fitting are hot plugged, an electric spark will be generated on the primary contact point of the female-type metal terminal fitting. In addition, when the male-type metal terminal fitting is obliquely inserted into the female-type metal terminal fitting, the female-type metal terminal fitting is easily deformed. 
     The description of the above “background” only provides a background, and it is not admitted that the description of the above “background” discloses the protection scope of the present disclosure, and the description of the above “background” does not constitute the background of the present disclosure, and any description of the above “background” should not be considered as any part of the present disclosure. 
     SUMMARY 
     An embodiment of the present disclosure provides a connector. The connector comprises an insulating housing and a terminal. The insulating housing defines a terminal receiving groove therein, and the insulating housing comprises a stop wall. The terminal is positioned in the terminal receiving groove of the insulating housing, and the terminal comprises an insert portion, a wiring portion and a connecting portion. The insert portion defines an insert space therein, and the insert portion comprises a front frame portion, a rear frame portion, a top plate portion, an arc discharge contact member and a primary contact member. The rear frame portion is spaced apart from the front frame portion in a front-rear direction. The top plate portion connects the front frame portion and the rear frame portion. The arc discharge contact member comprises a bottom plate portion and a top elastic arm. The bottom plate portion connects the front frame portion and the rear frame portion and is spaced apart from the top plate portion in an up-down direction. The top elastic arm extends from the rear frame portion to the front frame portion and is positioned below the top plate portion. The arc discharge contact member is positioned in front of the primary contact member. The primary contact member comprises a first elastic arm and a second elastic arm. The first elastic arm extends from the rear frame portion to the front frame portion and is adjacent between the bottom plate portion and the top elastic arm. The second elastic arm extends from the rear frame portion to the front frame portion, is adjacent between the top plate portion and the bottom plate portion, and is spaced apart from the first elastic arm in a left-right direction. The connecting portion connects the insert portion and the wiring portion. The connecting portion comprises a stopping portion which is configured to abut against the stop wall of the insulating housing. 
     In some embodiments, the bottom plate portion comprises a bottom plate contact portion. The top elastic arm comprises a top contact portion which faces the bottom plate contact portion and is positioned in the insert space. The first elastic arm comprises a first contact portion which is positioned in the insert space. The second elastic arm comprises a second contact portion which faces the first contact portion and is positioned in the insert space, wherein the top contact portion and the bottom plate contact portion are positioned in front of the first contact portion and the second contact portion. 
     In some embodiments, the front frame portion and the rear frame portion each comprise a first end portion and a second end portion which are opposite to each other, the first end portion is connected with the top plate portion, the second end portion is a free end, and the top plate portion is positioned above the front frame portion and the rear frame portion. 
     In some embodiments, the front frame portion comprises a first end portion and a second end portion which are opposite to each other, the first end portion is connected with the top plate portion, the first end portion comprises a catch hole, and the second end portion comprises a protrusion which is configured to insert into the catch hole. 
     In some embodiments, the rear frame portion comprises a rear frame bottom portion, and wherein the connecting portion further comprises a connecting bottom portion which is lower than the rear frame bottom portion, and a step portion which connects the connecting bottom portion and the rear frame bottom portion. 
     In some embodiments, there is a gap between the bottom plate portion of the terminal and an inner wall of the insulating housing in the up-down direction. 
     In some embodiments, the bottom plate contact portion is formed by bulging the bottom plate portion toward the insert space. 
     In some embodiments, an edge bulging portion bulges upwardly from a rear edge of the top plate portion, and the insulating housing further comprises a locking shoulder which latches with the edge bulging portion and has elasticity. 
     In some embodiments, the bottom plate contact portion, the top contact portion, the first contact portion and the second contact portion are respectively provided at a down side, an up side, a left side and a right side of the insert space. 
     In some embodiments, the top contact portion, the first contact portion and the second contact portion are respectively positioned in a tip of the top elastic arm, a tip of the first elastic arm and a tip of the second elastic arm. 
     In some embodiments, the top contact portion, the first contact portion and the second contact portion each are an elliptical surface. 
     In some embodiments, the connector is a vehicle connector. 
     Another embodiment of the present disclosure provides a terminal. The terminal comprises an insert portion, a wiring portion and a connecting portion. The insert portion defines an insert space therein, and the insert portion comprises a front frame portion, a rear frame portion, a top plate portion, an arc discharge contact member and a primary contact member. The rear frame portion is spaced apart from the front frame portion in a front-rear direction. The top plate portion connects the front frame portion and the rear frame portion. The arc discharge contact member comprises a bottom plate portion and a top elastic arm. The bottom plate portion connects the front frame portion and the rear frame portion and is spaced apart from the top plate portion in an up-down direction. The top elastic arm extends from the rear frame portion to the front frame portion and is positioned below the top plate portion. The arc discharge contact member is positioned in front of the primary contact member. The primary contact member comprises a first elastic arm and a second elastic arm. The first elastic arm extends from the rear frame portion to the front frame portion and is adjacent between the bottom plate portion and the top elastic arm. The second elastic arm extends from the rear frame portion to the front frame portion, is adjacent between the top plate portion and the bottom plate portion and is spaced apart from the first elastic arm in a left-right direction. The connecting portion connects the insert portion and the wiring portion. The connecting portion comprises a stopping portion which is configured to abut against the stop wall of the insulating housing. 
     In some embodiments, the bottom plate portion comprises a bottom plate contact portion. The top elastic arm comprises a top contact portion which faces the bottom plate contact portion and is positioned in the insert space. The first elastic arm comprises a first contact portion which is positioned in the insert space. The second elastic arm comprises a second contact portion which faces the first contact portion and is positioned in the insert space, wherein the top contact portion and the bottom plate contact portion are positioned in front of the first contact portion and the second contact portion. 
     In some embodiments, the front frame portion and the rear frame portion each comprise a first end portion and a second end portion which are opposite to each other, the first end portion is connected with the top plate portion, the second end portion is a free end, and the top plate portion is positioned above the front frame portion and the rear frame portion. 
     In some embodiments, the front frame portion comprises a first end portion and a second end portion which are opposite to each other, the first end portion is connected with the top plate portion, and the first end portion comprises a catch hole, the second end portion comprises a protrusion which is configured to insert into the catch hole. 
     In some embodiments, the rear frame portion comprises a rear frame bottom portion, and wherein the connecting portion further comprises a connecting bottom portion which is lower than the rear frame bottom portion and a step portion which connects the connecting bottom portion and the rear frame bottom portion. 
     In some embodiments, the bottom plate contact portion is formed by bulging the bottom plate portion toward the insert space. 
     In some embodiments, an edge bulging portion bulges upwardly from a rear edge of the top plate portion. 
     In some embodiments, the bottom plate contact portion, the top contact portion, the first contact portion and the second contact portion are respectively provided at a down side, an up side, a left side and a right side of the insert space. 
     In some embodiments, the top contact portion, the first contact portion and the second contact portion are respectively positioned in a tip of the top elastic arm, a tip of the first elastic arm and a tip of the second elastic arm. 
     In some embodiments, the top contact portion, the first contact portion and the second contact portion each are an elliptical surface. 
     In the present disclosure, because of the arrangement of the protrusion and the catch hole of the front frame portion of the terminal, the front frame portion of the terminal is relatively difficult to deform, thereby avoiding the terminal being damaged by the male terminal when the male terminal is obliquely inserted into the terminal. 
     In addition, the terminal comprises four contact points, in which the first contact portion in the left and the second contact portion in the right are the primary contact points, and the top contact portion in the up and the bottom plate contact portion in the down are secondary contact points. When the male terminal is inserted under electric hot plug, the top contact portion in the up and the bottom plate contact portion in the down contact the male terminal earlier than the first contact portion in the left and the second contact portion in the right. In this way, the electric spark generated by the insertion will be only remained on the top contact portion in the up and the bottom plate contact portion in the down, the first contact portion in the left and the second contact portion the right will not be affected. Therefore, the terminal has a function of hot plug. 
     Furthermore, three of the four contact points are respectively positioned in the tip of the top elastic arm, the tip of the first elastic arm and the tip of the second elastic arm. Because the top elastic arm, the first elastic arm and the second elastic arm are cantilever structures, the top elastic arm, the first elastic arm and the second elastic arm have good flexibility, the top elastic arm, the first elastic arm and the second elastic arm are more resistant to fretting corrosion with respect to the terminal contact surfaces thereof. 
     The technical features and advantages of the present disclosure have been generalized quite broadly above, so that the detailed description of the present application below can be better understood. Other technical features and advantages constituting the protection scope of the claims of the present disclosure will be described below. Those skilled persons in the art should understand that the concepts and specific embodiments disclosed below can be easily utilized to modify or design other structures or manufacturing methods to achieve the same purpose as the present disclosure. Those skilled persons in the art should also understand that such equivalent construction cannot depart from the spirit and scope defined by the appended claims of the present disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The disclosed contents of the present disclosure can be more fully understood in conjunction with the detailed description and claims referring to the drawings, and the same reference numeral indicates the same element in the drawings. 
         FIG. 1  is an assembled schematic perspective view of a power connector. 
         FIG. 2  is an exploded schematic perspective view of the power connector with respect to  FIG. 1 . 
         FIG. 3  is an exploded schematic perspective view of a plug connector and a receptacle connector of  FIG. 2 . 
         FIG. 4  is a schematic perspective view of a female terminal of the plug connector of  FIG. 3 . 
         FIG. 5  is a schematic perspective view of the female terminal with respect to  FIG. 4  from another perspective. 
         FIG. 6  is a schematic perspective view of the female terminal with respect to  FIG. 5  from another perspective. 
         FIG. 7  is a schematic perspective view of the female terminal with respect to  FIG. 6  from another perspective. 
         FIG. 8  is a schematic side plan view of the female terminal with respect to  FIG. 5 . 
         FIG. 9  is an expanded schematic perspective view of the female terminal relative to  FIG. 4 . 
         FIG. 10  is an expanded schematic plan view of the female terminal with respect to  FIG. 9 . 
         FIG. 11  is a schematic cross-sectional plan view of the power connector of  FIG. 1  taken along a cross-sectional line in a front-rear direction to illustrate a bottom plate contact portion and a first contact portion of the female terminal of  FIG. 4 . 
         FIG. 12  is a schematic cross-sectional plan view of the power connector of  FIG. 1  taken along a cross-sectional line in the front-rear direction to illustrate a stop wall of an insulating housing. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The embodiments or examples of the disclosed contents illustrated in the drawings are described in specific languages. It should be understood that it is not intended to limit the scope of the present disclosure. Any change or modification of the embodiments and any further application of the principles described in the present disclosure can occur normally for those skilled persons in the art. Reference numerals may be repeated in each embodiment, but even if they have the same reference numerals, the features in an embodiment are not necessarily used in another embodiment. 
     The following detailed description describes various exemplary embodiments and it is not intended to limit the present disclosure to the explicitly disclosed combinations. Therefore, unless otherwise stated, the features disclosed herein may be combined together to form multiple additional combinations not shown for the sake of conciseness. 
     A female terminal of the present disclosure helps to control discharge arc that occurs between the female terminal and a male terminal mated with the female terminal when a power connector is hot plugged. Some embodiments permit the female terminal to include one or more sacrificial electrical contacts, and these sacrificial electrical contacts are configured to engage with the mating male terminal so as to release any arc before the mating male terminal engages with a primary contact member of the female terminal. Therefore, the female terminal of the present disclosure has a protection (function) of the arc discharge against the primary contact member of the female terminal. 
       FIG. 1  is an assembly schematic perspective view of a power connector  1 .  FIG. 2  is an exploded schematic perspective view of the power connector  1  with respect to  FIG. 1 .  FIG. 3  is an exploded schematic perspective view of a plug connector  2  and a receptacle connector  3  of  FIG. 2 . Referring to  FIG. 1  to  FIG. 3 , the power connector  1  includes a plug connector  2  connecting a plurality of wire  5 , a receptacle connector  3  mating with the plug connector  2  in a front-rear direction Y 1 -Y 2  and a locking structure  4  holding the plug connector  2  and receptacle connector  3  together. Only two wires  5  are illustrated as an example in the embodiment. In the present disclosure, the plug connector  2  may also be referred to as a connector  2 . 
     The plug connector  2  includes an insulating housing  20  and a plurality of female terminals  21  positioned in the insulating housing  20 . Only two female terminals  21  are illustrated as an example in the embodiment. In the present disclosure, the female terminal  21  may also be referred to as a terminal  21 . Specifically, the insulating housing  20  defines a plurality of terminal receiving grooves  200  extending in the front-rear direction Y 1 -Y 2  therein. Each female terminal  21  is positioned in the corresponding terminal receiving groove  200 . In some embodiments, each female terminal  21  is formed by stamping a metalplate. 
     The receptacle connector  3  includes an insulating housing  30  and a plurality of male terminals  31  positioned in the insulating housing  30 . Only two male terminals  31  are illustrated as an example in the embodiment. The locking structure  4  includes an elastic latching portion  40  and a locking portion  41 . In the embodiment, the elastic latching portion  40  is provided on the insulating housing  20  of the plug connector  2 , and the locking portion  41  is provided on the insulating housing  30  of the receptacle connector  3 . However, the locking structure  4  of the present disclosure is not limited thereto. Any structure that can hold the plug connector  2  and the receptacle connector  3  together is a potential implementing manner. 
       FIG. 4  is a schematic perspective view of the female terminal  21  of the plug connector  2  of  FIG. 3 .  FIG. 5  is a schematic perspective view of the female terminal  21  with respect to  FIG. 4  from another perspective.  FIG. 6  is a schematic perspective view of the female terminal  21  with respect to  FIG. 5  from another perspective.  FIG. 7  is a schematic perspective view of the female terminal  21  with respect to  FIG. 6  from another perspective.  FIG. 8  is a schematic side plan view of the female terminal  21  with respect to  FIG. 5 .  FIG. 9  is an expanded schematic perspective view of the female terminal  21  with respect to  FIG. 4 .  FIG. 10  is an expanded schematic plan view of the female terminal  21  relative to  FIG. 9 . 
     Referring to  FIG. 4  to  FIG. 10 , the female terminal  21  includes an insert portion  210 , a wiring portion  211  and a connecting portion  212  connecting the insert portion  210  and the wiring portion  211 . A structure before assembling, a assembling process and a structure after assembling of the female terminal  21  will be described below. 
     Referring to  FIG. 9  and  FIG. 10 , a structure of the female terminal  21  before assembling is illustrated, the insert portion  210  includes a front frame portion  2101 , a rear frame portion  2102  spaced apart from the front frame portion  2101  in the front-rear direction Y 1 -Y 2 , a top plate portion  2103  connecting the front frame portion  2101  and the rear frame portion  2102 , an arc discharge contact member  2104  and a primary contact member  2105 . 
     The arc discharge contact member  2104  includes a bottom plate portion  21040  connecting the front frame portion  2101  and the rear frame portion  2102  (see  FIG. 8 ) and a top elastic arm  21041  extending from the rear frame portion  2102  to the front frame portion  2101  (see  FIG. 8 ). The arc discharge contact member  2104  replaces the primary contact member  2105  to bear the arc discharge occurring on the female terminal  21 , which will be described in detail as follows. In addition, the bottom plate portion  21040  includes a bottom plate contact portion  210400 . Similarly, the top elastic arm  21041  includes a top contact portion  210410 . 
     The primary contact member  2105  includes a first elastic arm  21050  which extends from the rear frame portion  2102  to the front frame portion  2101  and is adjacent between the bottom plate portion  21040  and the top elastic arm  21041  (see  FIG. 10 ) and a second elastic arm  21051  which extends from the rear frame portion  2102  to the front frame portion  2101 , is adjacent between the top plate portion  2103  and the bottom plate portion  21040  (see  FIG. 10 ) and spaced apart from the first elastic arm  21050  in a left-right direction X 2 -X 1  (see  FIG. 4 ). In addition, the first elastic arm  21050  includes a first contact portion  210500 . Similarly, the second elastic arm  21051  includes a second contact portion  210510 . 
     Because the top elastic arm  21041 , the first elastic arm  21050  and the second elastic arm  21051  are cantilever structures, the top elastic arm  21041 , the first elastic arm  21050  and the second elastic arm  21051  have good flexibility, and the top elastic arm  21041 , the first elastic arm  21050  and the second elastic arm  21051  are more resistant to fretting corrosion with respect to terminal contact surfaces thereof. 
     The front frame portion  2101  includes a first end portion  21010  and a second end portion  21011  which are opposite to each other. The first end portion  21010  is connected with the top plate portion  2103 , and the second end portion  21011  is a free end. The first end portion  21010  includes a catch hole  210100 , and the second end portion  21011  includes a protrusion  210110 . 
     The rear frame portion  2102  includes a first end portion  21021  and a second end portion  21022  which are opposite to each other. The first end portion  21021  is connected with the top plate portion  2103 . The second end portion  21022  is a free end. 
     In the process of assembling the female terminal  21  to be a three-dimensional female terminal, a protrusion  210110  is inserted into the catch hole  210100 . In this way, the front frame portion  2101  of the female terminal  21  is relatively difficult to deform, thereby avoiding the female terminal  21  being damaged by the male terminal  31  when the male terminal  31  is obliquely inserted into the female terminal  21 . 
     Referring to  FIG. 4  to  FIG. 8 , a structure of the female terminal  21  after assembling is illustrated, in the embodiment, the front frame portion  2101  is a rectangular frame. However, the present disclosure is not limited thereto. In other embodiments, the front frame portion  2101  may be a frame having other shape. In addition, in the embodiment, the rear frame portion  2102  is a rectangular frame. However, the present disclosure is not limited thereto. In other embodiments, the rear frame portion  2102  may be a frame having other shape. 
     The insert portion  210  defines an insert space  2100  to allow the male terminal  31  to insert therein. When viewed from the insert portion  210  toward the wiring portion  211 , the top plate portion  2103  is positioned above the front frame portion  2101  and the rear frame portion  2102 . 
     In addition, the top elastic arm  21041  is positioned below the top plate portion  2103 . In this way, when the male terminal  31  is inserted into the insert space  2100 , the top elastic arm  21041  is elastically deformed by the squeezing of the male terminal  31  and is displaced upwardly to contact the top plate portion  2103 , thereby making the top elastic arm  21041  form a simple support beam effect. Therefore, a normal force applied to the top contact portion  210410  of the top elastic arm  21041  is increased, which can provide a lower and more stable contact resistance. Furthermore, the top plate portion  2103  is spaced apart from the bottom plate portion  21040  in an up-down direction Z 1 -Z 2 . 
     In addition, the insert space  2100  includes a left side  21000  and a right side  21001  which are spaced apart from each other in the left-right direction X 2 -X 1  and an up side  21002  and a down side  21003  which are spaced apart from each other in the up-down direction Z 1 -Z 2  (see  FIG. 4 ). 
     The bottom plate contact portion  210400  of the bottom plate portion  21040  is positioned in the insert space  2100  and provided at the down side  21003  of the insert space  2100  (see  FIG. 7  and  FIG. 9 ), the bottom plate contact portion  210400  serves as a secondary contact point of the female terminal  21 . Specifically, the bottom plate contact portion  210400  is formed by bulging the bottom plate portion  21040  toward the insert space  2100 . In addition, the bottom plate contact portion  210400  is an elliptical surface. The inserting angle of the male terminal  31  is smaller with respect to the elliptical surface when the male terminal  31  is inserted into the female terminal  21 . Therefore, without sacrificing the normal force and Hertzian stress, the inserting force can still be kept lower. However, the present disclosure is not limited thereto. In some embodiments, the bottom plate contact portion  210400  may be any other geometric shape. 
     The top contact portion  210410  of the top elastic arm  21041  faces the bottom plate contact portion  210400  and is positioned in the insert space  2100 , the top contact portion  210410  serves as a secondary contact point of the female terminal  21 . Specifically, the top contact portion  210410  is positioned at a tip of the top elastic arm  21041  and is provided at the up side  21002  of the insert space  2100  (see  FIG. 8 ). In some embodiments, the top contact portion  210410  is aligned with the bottom plate contact portion  210400  of the bottom plate portion  21040  in the front-rear direction Y 1 -Y 2  and the left-right direction X 2 -X 1  (see  FIG. 8 ). The top contact portion  210410  is an elliptical surface. The inserting angle of the male terminal  31  is smaller with respect to the elliptical surface when the male terminal  31  is inserted into the female terminal  21 . Therefore, without sacrificing the normal force and Hertzian stress, the inserting force can still be kept lower. However, the present disclosure is not limited thereto. In some embodiments, the top contact portion  210410  may be any other geometric shape. 
     The first contact portion  210500  of the first elastic arm  21050  is positioned in the insert space  2100 , the first contact portion  210500  serves as a primary contact point of the female terminal  21 . Specifically, the first contact portion  210500  is positioned at a tip of the first elastic arm  21050  and provided at the left side  21000  of the insert space  2100 . In addition, the first contact portion  210500  is an elliptical surface. The inserting angle of the male terminal  31  is smaller with respect to the elliptical surface when the male terminal  31  is inserted into the female terminal  21 . Therefore, without sacrificing the normal force and Hertzian stress, the inserting force can still be kept lower. However, the present disclosure is not limited thereto. In some embodiments, first contact portion  210500  may be any other geometric shape. In addition, the top contact portion the  210410  and the bottom plate contact portion  210400  are positioned in front of the first contact portion  210500  in the front-rear direction Y 1 -Y 2  (see  FIG. 8 ). 
     The second contact portion  210510  of the second elastic arm  21051  faces the first contact portion  210500  and positioned in the insert space  2100 , the second contact portion  210510  serves as a primary contact point of the female terminal  21 . Specifically, the second contact portion  210510  is positioned at a tip of the second elastic arm  21051  and provided at the right side  21001  of the insert space  2100 . In some embodiments, the second contact portion  210510  is aligned with the first contact portion  210500  of the first elastic arm  21050  in the front-rear direction Y 1 -Y 2  and the up-down direction Z 1 -Z 2 . The second contact portion  210510  is an elliptical surface. The inserting angle of the male terminal  31  is smaller with respect to the elliptical surface when the male terminal  31  is inserted into the female terminal  21 . Therefore, without sacrificing the normal force and Hertzian stress, the inserting force can still be kept lower. However, the present disclosure is not limited to this. In some embodiments, the second contact portion  210510  may be any other geometric shape. The top contact portion  210410  and the bottom plate contact portion  210400  are positioned in front of the second contact portion  210510  in the front-rear direction Y 1 -Y 2 . 
     When the male terminal  31  is inserted under electric hot plug, the top contact portion  210410  positioned at the up side  21002  of the insert space  2100  and the bottom plate contact portion  210400  positioned at the down side  21003  of the insert space  2100  contact the male terminal  31  earlier than the first contact portion  210500  positioned at the left side  21000  of the insert space  2100  and the second contact portion  210510  positioned at the right side  21001  of the insert space  2100 . That is, the male terminal  31  contacts the arc discharge contact member  2104  before the male terminal  31  contacts the primary contact member  2105 , and thus any arc discharge between the male terminal  31  and the female terminal  21  occurs at the arc discharge contact member  2104 . In this way, the electric spark generated due to the insertion will only be remained on the top contact portion  210410  and the bottom plate contact portion  210400  which serve as the secondary contact points, and the first contact portion  210500  and the second contact portion  210510  which serve as the primary contact points will not be affected. Therefore, the female terminal  21  has a function of hot plug. 
     In addition, referring back to  FIG. 3  and  FIG. 5 , the wiring portion  211  includes a wire clamp  2110  for clamping a conductive body  50  of the wire  5  and a sheath clamp  2111  for clamping a sheath  51  of the wire  5 . 
       FIG. 11  is a schematic cross-sectional plan view of the power connector  1  of  FIG. 1  taken along a cross-sectional line in the front-rear direction Y 1 -Y 2  to illustrate the bottom plate contact portion  210400  and the first contact portion  210410  of the female terminal  21  of  FIG. 4 . Referring to  FIG. 11 ,  FIG. 11  illustrates two female terminals  21 , the following description will mainly focus on the female terminal  21  close to the up. The top contact portion  210410  and the bottom plate contact portion  210400  positioned in the insert space  2100  contact the male terminal  31 . 
     The rear frame portion  2102  includes a rear frame bottom portion  21020 . The connecting portion  212  further includes a connecting bottom portion  2121  which is lower than the rear frame bottom portion  21020  and a step portion  2122  which connects the connecting bottom portion  2121  and the rear frame bottom portion  21020 . In this way, the bottom plate portion  21040  of the female terminal  21  is separated from an inner wall  2001  of the terminal receiving groove  200  of the insulating housing  20  in the up-down direction Z 1 -Z 2 , so that there is a gap  2000  between the bottom plate portion  21040  of the female terminal  21  and the inner wall  2001  of the terminal receiving groove  200 . The gap  2000  can provide floatability for the female terminal  21 . 
     In addition, referring to  FIG. 4  and  FIG. 11  at the same time, an edge bulging portion  21030  bulges upwardly from a rear edge of the top plate portion  2103  of the female terminal  21 . The insulating housing  20  further includes a locking shoulder  202  which latches with the edge bulging portion  21030  and has elasticity. Specifically, the edge bulging portion  21030  latches with a side surface of the locking shoulder  202  toward the front so as to prevent the female terminal  21  from withdrawing the insulating housing  20  after the female terminal  21  is inserted into the insulating housing  20 . In addition, the edge bulging portion  21030  can provide a better hand feel and a reminder sound in the process of assembling the female terminal  21  into the insulating housing  20 . 
       FIG. 12  is a schematic cross-sectional plan view of the power connector  1  of  FIG. 1  taken along a cross-sectional line in the front-rear direction Y 1 -Y 2  to illustrate a stop wall  201  of an insulating housing  20 . Referring to  FIG. 12 , the connecting portion  212  of the female terminal  21  further includes a plurality of stopping portions  2120  configured to abut against a stop wall  201  of the insulating housing  20 . The embodiment includes two stopping portions  2120 . Specifically, each stopping portion  2120  provides a guiding function and an anti-misinsertion function when the female terminal  21  is assembled into the corresponding terminal receiving groove  200 . In addition, a head portion of each stopping portion  2120  is rounded to make assembling of the female terminal  21  relatively smoothly. 
     In the description of the present disclosure, the left-right direction X 2 -X 1 , the front-rear direction Y 1 -Y 2 , the up-down direction Z 1 -Z 2  are used to illustrate the relative position relationship and action relationship of the components of  FIG. 1  to  FIG. 12 . That is, these directions are not absolute directions, but relative directions. Thus these directions are not limited to the orientations of the components of  FIG. 1  to  FIG. 12 . The explanation on the directions described in the present disclosure should be changed depending on the changing of the orientations of the components of  FIG. 1  to  FIG. 12 . 
     While the present disclosure and advantages thereof are described in detail, it is understood that various changes, replacements and substitutions may be made without departing from the spirit and scope of the present disclosure defined by the appended claims. For example, many processes described above can be implemented in a variety of ways, and many processes described above can be replaced with other processes or combinations thereof. Further, the scope of the present disclosure is not limited to the specific embodiments of process, machinery, manufacturing, substance composition, means, method or step described in the specification. Those skilled in the art can understand from the disclosed contents of the present disclosure that existing or future developed process, machinery, manufacturing, substance composition, means, method or step which has the same function or achieve essentially the same result as the corresponding embodiment described herein can be used in accordance with the present disclosure. Accordingly, such a process, machinery, manufacturing, substance composition, mean, method or step is included in the claims of the present disclosure.