Patent Publication Number: US-11050180-B2

Title: Connector terminal capable of suppressing reduction in connectivity and connector including the same

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This is the U.S. national stage of application No. PCT/JP2018/040961, filed on Nov. 5, 2018. Priority under 35 U.S.C. § 119(a) and 35 U.S.C. § 365(b) is claimed from Japanese Application No. 2017-225149 filed Nov. 22, 2017, the disclosure of which is also incorporated herein by reference. 
     TECHNICAL FIELD 
     The present disclosure relates to a connector terminal and a connector including the connector terminal. 
     BACKGROUND ART 
     PTL 1 discloses a contact pin of a connector formed by punching and bending a metal plate into a predetermined shape. This contact pin extends linearly and includes a pin-shaped contact terminal portion provided on the front end side, a body portion provided in the middle, and a connection terminal portion provided on the rear end side. On the body portion of the contact pin, a pair of lances are formed by cutting and raising left and right side surfaces of the body portion and laterally protrude from the body portion. 
     The contact pin is assembled to a contact holding hole of an insulator to form a connector main body together with the insulator. A synthetic resin material is molded on an outer peripheral surface of the connector main body, thereby forming the connector. 
     CITATION LIST 
     Patent Literature 
     PTL 1: JP H09-147948 A 
     SUMMARY OF INVENTION 
     Technical Problem 
     With the contact pin, when a synthetic resin material is molded on the outer peripheral surface of the connector main body, the synthetic resin material may flow into the body portion through a cutout formed when each lance portion is cut and raised. This may cause the synthetic resin material that has flowed into the body portion to flow into the contact terminal portion, leak out of the contact terminal portion into the contact holding hole, and in turn reduce connectivity of the contact pin. 
     It is therefore an object of the present disclosure to provide a connector terminal capable of suppressing a reduction in connectivity, and a connector including the connector terminal. 
     Solution to Problem 
     A connector terminal as an example of the present disclosure that can be held in a holding portion of a connector having a housing, which has insulation properties and in which the holding portion is provided, and that can connect an electric wire, the connector terminal comprising: 
     a terminal main body extending along a center line; 
     a contact portion provided at a first end portion of the terminal body in an extension direction of the terminal body; 
     a lance portion provided at a second end portion of the terminal body in the extension direction of the terminal body and configured to position the connector terminal in the holding portion in an extension direction of the center line; 
     a connection portion that is disposed between the contact portion and the lance portion and to which a conductor portion of the electric wire can be connected from the lance portion side; and 
     a resin positioning portion disposed between the contact portion and the connection portion and configured to position a resin-filled portion extending from the lance portion toward the contact portion, wherein 
     the resin positioning portion includes 
     a guide wall portion with a tubular shape having a through hole extending along the center line, and 
     a positioning wall portion formed by cutting and raising at least one of a part of the terminal main body and a part of the guide wall portion and configured to close the through hole inside the guide wall portion in the extension direction of the center line, 
     the positioning wall portion includes a locking protrusion portion protruding from the positioning wall portion toward the outside of the resin positioning portion in a direction intersecting the extension direction of the center line, and 
     the guide wall portion includes a locking recess portion that locks the locking protrusion portion to restrict the position of the positioning wall portion relative to the guide wall portion. 
     A connector as an example of the present disclosure includes: 
     the connector terminal; and 
     the housing having the holding portion in which the connector terminal is held. 
     Advantageous Effects of Invention 
     According to the connector terminal, the resin positioning portion includes the guide wall portion with a tubular shape and the positioning wall portion. The guide wall portion includes the through hole extending along the center line. The positioning wall portion is formed by cutting and raising at least one of a part of the terminal main body and a part of the guide wall portion and is configured to close the through hole inside the guide wall portion in the extension direction of the center line. The positioning wall portion includes the locking protrusion portion protruding from the positioning wall portion toward the outside of the resin positioning portion. The guide wall portion includes the locking recess portion that locks the locking protrusion portion to restrict the position of the positioning wall portion relative to the guide wall portion. For example, even when resin flows from a side adjacent to the lance portion into the resin positioning portion, the positioning wall portion can prevent the resin-filled portion from being formed in the contact portion, which in turn makes it possible to suppress a reduction in connectivity of the connector terminal due to the resin. 
     Since the connector includes the connector terminal, it is possible to realize the connector that is high in connectivity. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view of a connector according to an embodiment of the present disclosure. 
         FIG. 2  is a perspective view showing the connector shown in  FIG. 1  with an electric wire and a cover removed from the connector. 
         FIG. 3  is a cross-sectional view taken along a line of  FIG. 1 . 
         FIG. 4  is a perspective view of a socket terminal that is a connector terminal according to the embodiment of the present disclosure. 
         FIG. 5  is a perspective view showing a contact portion of the socket terminal shown in  FIG. 4 . 
         FIG. 6  is a plan view showing a lance portion of the socket terminal shown in  FIG. 4 . 
         FIG. 7  is a plan view of the lance portion side of the socket terminal shown in  FIG. 4  when viewed from an extension direction of a center line of the socket terminal. 
         FIG. 8  is a cross-sectional view taken along a line VIII-VIII of  FIG. 4 . 
         FIG. 9  is an enlarged view of a resin positioning portion  50  and the vicinity of the resin positioning portion  50  shown in the cross-sectional view of  FIG. 8 . 
         FIG. 10  is a plan view for describing a process of forming the resin positioning portion of the socket terminal shown in  FIG. 4 . 
         FIG. 11  is a cross-sectional view for describing a modification of the socket terminal shown in  FIG. 4 . 
         FIG. 12  is a perspective view of a plug terminal that is a connector terminal according to the embodiment of the present disclosure. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Hereinafter, a description will be given of an example of the present disclosure with reference to the accompanying drawings. Note that, in the following description, terms representing specific directions or positions (for example, terms including “up”, “down”, “right”, and “left”) will be used as necessary, but the use of these terms is intended to facilitate understanding of the present disclosure with reference to the drawings, and the technical scope of the present disclosure is not limited by the meanings of the terms. Further, the following description shows merely an example in nature and is not intended to limit the present disclosure, applications of the present disclosure, or uses of the present disclosure. Furthermore, the drawings are schematic drawings, and ratios between dimensions are not necessarily equal to the actual ratios. 
     As shown in  FIG. 1 , a connector  1  according to an embodiment of the present disclosure is a socket connector to which a plug connector (not shown) can be connected, and includes an insulating housing  10  having a holding portion  11 . Note that, according to this embodiment, as an example, the housing  10  has four holding portions  11 , and each of the holding portions  11  has an approximately columnar shape. 
     As shown in  FIG. 2 , the housing  10 , which has an approximately cylinder shape, includes a terminal insertion surface provided on an outer end portion  101  of the housing  10  in an extension direction of the housing  10 . Provided on the terminal insertion surface are four opening portions  103  with each of which a corresponding one of the holding portions  11  communicates. Further, provided at an inner end portion  102  in the extension direction of the housing  10  is a locking portion  12  to which a lance portion  40  of a connector terminal  20  to be described later can be locked in an extension direction of the holding portions  11 . According to this embodiment, as an example, the locking portion  12  includes four cutout portions  12  each associated with a corresponding one of the holding portions  11  (only two cutout portions  12  are shown in  FIG. 2 ). Each of the cutout portions  12  extends in a circumferential direction of the housing  10  and has a length of about one sixth of an outer peripheral length of the housing  10 . 
     As shown in  FIG. 3 , in each of the holding portions  11 , the connector terminal  20  shown in  FIG. 4  is held (only two holding portions  11  are shown in  FIG. 3 ). A conductor portion  5  of an electric wire  2  is connected to the connector terminal  20  from the inner end portion  102  (shown in  FIG. 2 ) side in the extension direction of the housing  10 . 
     As shown in  FIGS. 1 and 3 , provided at the inner end portion  102  of the housing  10  is, as an example, a cover portion  3  molded of a polybutylene terephthalate resin (PBT resin). The cover portion  3  is formed to cover the inner end portion  102  of the housing  10  and the electric wire  2 . As shown in  FIGS. 1 to 3 , provided around the extension direction of the housing  10  is a fixing portion  4  that is used to fix a connected plug connector. 
     Note that, in  FIG. 2 , the electric wire  2  and the cover portion  3  are removed. 
     Next, a description will be given of the connector terminal  20  according to the embodiment of the present disclosure with reference to  FIGS. 4 to 12 . According to this embodiment, the connector terminal  20  is, as an example, a socket terminal to which a plug terminal  120  (see  FIG. 12 ) can be connected. 
     As shown in  FIG. 4 , the socket terminal  20  includes a terminal body  21  extending along a center line CL 1  of the socket terminal  20 , a contact portion  30  provided at a first end portion  211  serving as one end portion in an extension direction of the terminal body  21 , the lance portion  40  provided at a second end portion  212  serving as the other end portion in the extension direction of the terminal body  21 , and a connection portion  22  disposed between the contact portion  30  and the lance portion  40 . Provided between the connection portion  22  and the contact portion  30  of the terminal body  21  is a resin positioning portion  50 . Note that the center line CL 1  of the socket terminal  20  extends approximately parallel to a center line CL 2  (shown in  FIG. 3 ) of the holding portion  11  of the housing  10 . The connection portion  22  is provided to allow the conductor portion  5  of the electric wire  2  to be connected to the connection portion  22  from the lance portion  40 . 
     As shown in  FIG. 4 , the terminal body  21  has a pair of electric wire clamp portions  23  provided between the connection portion  22  and the second end portion  212  of the terminal body  21 . Each of the electric wire clamp portions  23  extends around the center line CL 1  from both end portions of the socket terminal  20  in a width direction intersecting the extension direction of the center line CL 1  and clamps an insulation portion  6  (shown in  FIG. 3 ) of the electric wire  2  when the conductor portion  5  of the electric wire  2  is connected to the connection portion  22 . 
     As shown in  FIG. 5 , the terminal body  21  has a plug terminal holding portion  213  capable of holding the plug terminal  120  between a position restriction portion  31  at the first end portion  211  and the resin positioning portion  50 , and a terminal guide surface  26  provided on the plug terminal holding portion  213 . The terminal guide surface  26  guides the plug terminal  120  in the extension direction of the center line CL 1  when the socket terminal  20  is inserted into the holding portion  11  of the housing  10 . 
     As shown in  FIG. 6 , the terminal body  21  has an electric wire guide surface  24  provided on the second end portion  212 . As shown in  FIG. 7 , the electric wire guide surface  24  is an approximately semicircular arc surface around the center line CL 1  when viewed from the extension direction of the center line CL 1  and guides the electric wire  2  in the extension direction of the center line CL 1  when the conductor portion  5  of the electric wire  2  is connected to the connection portion  22 . 
     As shown in  FIG. 4 , the contact portion  30  has the position restriction portion  31  provided at a tip of the terminal body  21  adjacent to the first end portion  211  and a resilient contact portion  33  provided between the position restriction portion  31  and the connection portion  22  of the terminal body  21 . The contact portion  30  is disposed so as to come into contact with the plug terminal  120  inserted into the holding portion  11  through the opening portion  103  opening to an opening surface of the outer end portion  101  of the housing  10 . 
     As shown in  FIG. 3 , the position restriction portion  31  is configured by an annular band portion  34 . The annular band portion  34  is provided at an end portion of the contact portion  30  away from the connection portion  22 , and, as shown in  FIG. 5 , extending, in a circumferential direction, on an inner peripheral surface  13  of the housing  10  serving as the holding portion  11 . The annular band portion  34  has an approximately uniform width W (that is, a length of the socket terminal  20  in the extension direction of the center line CL 1 ). The annular band portion  34  is provided so as to restrict by its outer peripheral surface the position of the contact portion  30  in a direction orthogonal to the extension direction of the holding portion  11  when the socket terminal  20  is held in the holding portion  11  and so as to insert the plug terminal  120  into the annular band portion  34 . 
     Specifically, the position restriction portion  31  is configured to restrict the position through contact between the outer peripheral surface of the annular band portion  34  and the inner peripheral surface  13  of the housing  10  when the socket terminal  20  is held in the holding portion  11 . 
     As shown in  FIG. 5 , the resilient contact portion  33  is provided as a pair at one end portion and the other end portion (that is, both end portions) of the terminal guide surface  26  of the terminal body  21  in the width direction intersecting the extension direction of the center line CL 1 . The resilient contact portions  33  each have a flat plate shape and are arranged symmetrically with respect to the center line CL 1 . The resilient contact portions  33  each extend from both ends in the width direction of the terminal body  21  toward the position restriction portion  31  along the center line CL 1  and toward a center portion of the terminal body  21  in the width direction. Each of the resilient contact portions  33  is provided so as to come into contact with the plug terminal  120  inserted into the holding portion  11  of the housing  10  to resiliently deform in the width direction and away from the center line CL 1 . 
     That is, each of the resilient contact portions  33  has a cantilever structure, and a proximal end portion  37  that is one end portion of the resilient contact portion  33  in the extension direction of the resilient contact portion  33 , is connected to the terminal body  21 . Each of the resilient contact portions  33  has a distal end portion  36  that is not connected to the terminal body  21 , is located adjacent to the center line CL 1  as compared with the proximal end portion  37  connected to the terminal body  21  in the width direction of the terminal body  21 , and is swingable in the width direction of the terminal body  21 . 
     A bent portion  38  that is bent away from the center line CL 1  in the width direction of the terminal body  21  is provided at the distal end portion  36  of each of the resilient contact portions  33  adjacent to the position restriction portion  31 . The bent portion  38  allows the plug terminal  120  inserted through the annular band portion  34  of the position restriction portion  31  to be smoothly inserted between the pair of resilient contact portions  33  without collision with the distal end portions  36  of the pair of resilient contact portions  33  when the plug terminal  120  is inserted into the holding portion  11 . 
     As shown in  FIG. 6 , the lance portion  40  has at least three positioning lances that position the connector terminal  20  (that is, the socket terminal  20 ) in the holding portion  11  in the extension direction of the center line CL 1  (in this embodiment, three positioning lances, that is, a first positioning lance  41 , a second positioning lance  42 , and a third positioning lance  43 ). The positioning lances  41 ,  42  and  43  are provided at intervals around the center line CL 1  so as to be locked to the locking portion  12  (that is, the cutout portions  12 ) of the housing  10  in the extension direction of the center line CL 1  (see  FIG. 3 ). 
     As shown in  FIG. 6 , the first positioning lance  41  is provided on the electric wire guide surface  24  of the second end portion  212  of the terminal body  21 . Further, the second positioning lance  42  and the third positioning lance  43  are arranged on both sides of the first positioning lance  41  in the circumferential direction with respect to the center line CL 1 . 
     As shown in  FIG. 6 , an end portion adjacent to the connection portion  22  of each of the positioning lances  41 ,  42  and  43  is connected to the terminal body  21 . Each of the positioning lances  41 ,  42  and  43  has a plate shape that extends and tapers from the end portion connected to the terminal body  21  in the extension direction of the center line CL 1  toward the second end portion  212  of the terminal body  21 . Each positioning lance  41 ,  42  and  43  extends gradually away from the center line CL 1  toward the second end portion  212  of the terminal body  21  from the end portion connected to the terminal body  21 . Each positioning lance  41  has a corresponding one of a bent portions  411 ,  421  and  431  located in an intermediate portion and closer to the center line CL 1  than an imaginary straight line L 4  connecting both end portions in the extension direction of each of the positioning lances  41 ,  42  and  43  (in  FIG. 6 , only the imaginary straight lines L 4  of the second positioning lance  42  and the third positioning lance  43  are shown). 
     Note that, according to this embodiment, a straight line connecting centers in a thickness direction (denoted as D 1  and D 2  in  FIG. 6 ) at both ends in the extension direction of each of the positioning lances  41 ,  42  and  43  is defined as the imaginary straight line L 4 . 
     As shown in  FIG. 7 , when viewed from the extension direction of the center line CL 1 , each of the positioning lances  41 ,  42  and  43  is configured such that an angle θ 1  formed by a first imaginary straight line L 1  connecting the center line CL 1  and the first positioning lance  41  and a second imaginary straight line L 2  connecting the center line CL 1  and the second positioning lance  42  is larger than 0 degrees and smaller than 180 degrees around the center line CL 1 , and an angle θ 3  formed by the first imaginary straight line L 1  and a third imaginary straight line L 3  connecting the center line CL 1  and the third positioning lance  43  is larger than 0 degrees and smaller than 180 degrees around the center line CL 1 . Note that an angle formed by the second imaginary straight line L 2  and the third imaginary straight line L 3  is denoted as θ 2 . 
     Specifically, the positioning lances  41 ,  42  and  43  are arranged at equal intervals in the circumferential direction on a circumference of a circle centered on the center line CL 1  when viewed from the extension direction of the center line CL 1  (that is, θ 1 =θ 2 =θ 3 =120 degrees). Therefore, regardless of the orientation of the socket terminal  20  around the center line CL 1  when the socket terminal  20  is held in the holding portion  11 , the socket terminal  20  can be locked to the cutout portions  12  of the housing  10 . 
     Note that the first imaginary straight line L 1 , the second imaginary straight line L 2 , and the third imaginary straight line L 3  are each a straight line passing through the center line CL 1  and any portion of a corresponding one of the positioning lances  41 ,  42  and  43  when viewed from the extension direction of the center line CL 1 . That is, as shown in  FIG. 7 , the first imaginary straight line L 1  is any straight line in a range of from a straight line L 11  to a straight line L 12 , and the second imaginary straight line L 2  is any straight line in a range of from a straight line L 21  to a straight line L 22 , and the third imaginary straight line L 3  is any straight line in a range of from a straight line L 31  to a straight line L 32 . Therefore, for example, the angle θ 1  formed by the first imaginary straight line L 1  and the second imaginary straight line L 2  is any angle in a range of from an angle θ 11  to an angle θ 12 . 
     As shown in  FIG. 8 , the resin positioning portion  50  has a guide wall portion  51  with a tubular shape having a through hole  53  with an approximately columnar shape extending along the center line CL 1 , and a positioning wall portion  52  formed by cutting and raising a part of the terminal body  21 . The positioning wall portion  52  with an approximately disk shape is configured to close the through hole  53  inside the guide wall portion  51  in the extension direction of the center line CL 1 . 
     As shown in  FIG. 9 , the positioning wall portion  52  has a locking protrusion portion  54  protruding from the positioning wall portion  52  toward the outside of the resin positioning portion  50  in a direction intersecting the extension direction of the center line CL 1 . This positioning wall portion  52  is cut and raised from a side adjacent to the lance portion  40  toward the contact portion  30 . The locking protrusion portion  54  and an uncut portion  56  that is an uncut portion of the positioning wall portion  52  are arranged at opposite ends of the positioning wall portion  52  in a radial direction with respect to a center of the disk shape. The guide wall portion  51  has a locking recess portion  55  that locks the locking protrusion portion  54  and restricts the position of the positioning wall portion  52  relative to the guide wall portion  51 . 
     When the cover portion  3  is formed, resin that is the material of the cover portion  3  may flow into the resin positioning portion  50  from a side adjacent to the lance portion  40  toward the contact portion  30  to form a resin-filled portion  60  extending from the lance portion toward the contact portion  30 . The guide wall portion  51  is configured to guide the resin flowing from the side adjacent to the lance portion  40  toward the contact portion  30  to the positioning wall portion  52 , and the positioning wall portion  52  is configured to position the resin-filled portion  60 . 
     As shown in  FIG. 9 , cutting and raising a part of the terminal body  21  to form the positioning wall portion  52  makes the resin less prone to flow into the plug terminal holding portion  213  of the terminal body  21  adjacent to the contact portion  30  even if the resin flowing into the resin positioning portion  50  flows out of the through hole  57  that is formed in the terminal body  21  when the positioning wall portion  52  is cut and raised and extends through the terminal body  21  in a direction orthogonal to the center line CL 1 . 
     A description will be given below of a process of forming the resin positioning portion  50  with reference to  FIG. 10 . 
     As shown in  FIG. 10 , the resin positioning portion  50  includes a second member  202  and a third member  203  each having an approximately rectangular plate shape. The second member  202  and the third member  203  are arranged on both sides in a short-side direction of a first member  201  that constitutes the terminal body  21  and has an approximately rectangular plate shape. 
     First, a cut is made around a center point CP located on a center line CL 3  in the short-side direction of the first member  201  to form a slit  521  having an approximately arc shape, while recesses  551 ,  552  are formed, extending toward the center line CL 3  of the first member  201 , on outer side surfaces  204 ,  205  of the second member  202  and the third member  203  away from the center line CL 3  of the first member  201 , respectively. 
     The slit  521  is provided with a projecting portion  522  that projects in a direction away from the center point CP along the center line CL 3 . A part of the first member  201  surrounded by the projecting portion  522  constitutes the locking protrusion portion  54 . On the opposite side of the projecting portion  522  in the radial direction with respect to the center point CP, no slit  521  is formed. The opposite side of the projecting portion  522  constitutes the uncut portion  56  of the positioning wall portion  52 . Each of the recess portions  551 ,  552  is provided on an imaginary straight line L 5  connecting both ends of the slit  521 , and the two recess portions  551 ,  552  constitutes one locking recess portion  55 . 
     Subsequently, a part of the first member  201  surrounded by the slit  521  is bent and raised approximately perpendicular to a plate surface of the first member  201  to form the positioning wall portion  52 , while the second member  202  and the third member  203  are bent and raised along an outer peripheral surface around the center point CP of the positioning wall portion  52  to be joined to each other in a state that the outer surfaces  204 ,  205  face each other, thereby forming the guide wall portion  51 . 
     At this time, the recess portions  551 ,  552  are connected with their openings facing each other to form the locking recess portion  55 , and the locking protrusion portion  54  of the positioning wall portion  52  is held and locked inside the locking recess portion  55 . 
     Note that the positioning wall portion  52  has an outer shape larger than the through hole  53  inside the guide wall portion  51  when viewed from the extension direction of the center line CL 1  of the socket terminal  20 . This reliably seals a space between the guide wall portion  51  and the positioning wall portion  52  inside the guide wall portion  51 . 
     According to the socket terminal  20 , the lance portion  40  is provided at the other end portion  212  in the extension direction of the terminal body  21 , so that when the socket terminal  20  is held in the holding portion  11  of the housing  10 , the lance portion  40  is lastly held in the holding portion  11 . This makes a sliding distance between the inner peripheral surface  13  of the holding portion  11  of the housing  10  and each of the positioning lances  41 ,  42  and  43  when the socket terminal  20  is held in the holding portion  11  short as compared with the contact pin disclosed in PTL 1 having a pair of lances provided on a body portion provided in a middle of the contact pin, thereby each of the positioning lances  41 ,  42  and  43  being locked to the locking portion  12  of the housing  10  at a position closer to the user. This in turn makes it possible to realize the socket terminal  20  that can be easily held in the holding portion  11  of the housing  10  and that allows confirmation of whether each of the positioning lances  41 ,  42  and  43  is locked to the locking portion  12  of the housing  10  to be easily made. 
     The socket terminal  20  has at least three positioning lances, that is, the first positioning lance  41 , the second positioning lance  42 , and the third positioning lance  43 , that position the socket terminal  20  in the holding portion  11  of the connector  1  in the extension direction of the center line CL 1 . The angle θ 1  formed by the first imaginary straight line L 1  connecting the center line CL 1  and the first positioning lance  41  and the second imaginary straight line L 2  connecting the center line CL 1  and the second positioning lance  42  is larger than 0 degrees and smaller than 180 degrees around the center line CL 1  of the socket terminal  20 , and the angle θ 3  formed by the first imaginary straight line L 1  and the third imaginary straight line L 3  connecting the center line CL 1  and the third positioning lance  43  is larger than 0 degrees and smaller than 180 degrees around the center line CL 1  of the terminal body  21 . This allows, as compared with the contact pin having a pair of lances arranged at intervals of 180 degrees or more around the center line disclosed in PTL 1, the socket terminal  20  to be easily locked to the locking portion  12  of the housing  10  regardless of the orientation of the socket terminal  20  around the center line CL 1  when the socket terminal  20  is held in the holding portion  11 . This in turn makes it possible to realize the socket terminal  20  that can reduce falling off of the socket terminal  20  from the housing  10 . 
     The positioning lances  41 ,  42  and  43  are arranged at equal intervals in the circumferential direction on the circumference of the circle centered on the center line CL 1  when viewed from the extension direction of the center line CL 1 . This in turn makes it possible to realize the socket terminal  20  that can more reliably reduce falling off from the housing  10 . 
     The terminal body  21  has the electric wire guide surface  24  configured to guide the electric wire  2  in the extension direction of the center line CL 1  when the conductor portion  5  of the electric wire  2  is connected to the connection portion  22 . The electric wire guide surface  24  allows the electric wire  2  to smoothly move in the extension direction of the center line CL 1 , which in turn allows the conductor portion  5  of the electric wire  2  to be easily connected to the connection portion  22 . 
     The terminal body  21  has the pair of electric wire clamp portions  23  capable of clamping the insulation portion  6  of the electric wire  2  when the conductor portion  5  of the wire  2  is connected to the connection portion  22 . The pair of electric wire clamp portions  23  can reduce a load applied to the conductor portion  5  of the electric wire  2  when the conductor portion  5  is connected to the connection portion  22 . 
     Since the connector  1  includes the socket terminal  20 , it is possible to realize the connector  1  that prevents the socket terminal  20  from falling off of the socket terminal  20  from the housing  10  and that is easily assembled. 
     In the socket terminal  20 , the resin positioning portion  50  has the guide wall portion  51  with a tubular shape having the through hole  53  extending along the center line CL 1 , and the positioning wall portion  52  formed by cutting and raising part of the terminal body  21  and configured to close the through hole  53  in the extension direction of the center line CL 1  inside the guide wall portion  51 . The positioning wall portion  52  has the locking protrusion portion  54  protruding from the positioning wall portion  52  toward the outside of the resin positioning portion  50 , and the guide wall portion  51  has the locking recess portion  55  that locks the locking protrusion portion  54  to restrict the position of the positioning wall portion  52  relative to the guide wall portion  51 . This allows the positioning wall portion  52  to prevent the resin-filled portion  60  from being formed in the contact portion  30  even when, for example, resin flows from a side adjacent to the lance portion  40  into the resin positioning portion  50  when molding the cover portion  3  of the resin, which in turn makes it possible to suppress a reduction in connectivity of the socket terminal  20  due to the resin. 
     The guide wall portion  51  has a cylinder shape having the through hole  53  with a columnar shape, the positioning wall portion  52  has a disk shape, and the locking protrusion portion  54  and the uncut portion  56  of the positioning wall portion  52  are arranged on opposite sides of the positioning wall portion  52  in the radial direction with respect to the center of the disk shape. This makes it possible to more reliably restrict the position of the positioning wall portion  52  relative to the guide wall portion  51 . 
     Since the connector  1  includes the socket terminal  20 , it is possible to realize the connector  1  that is high in connectivity. 
     In the socket terminal  20 , the contact portion  30  has the position restriction portion  31  configured by the annular band portion  34  provided at the tip of the terminal body  21  adjacent to the one end portion  211  and extending in the circumferential direction on the inner peripheral surface  13  of the housing  10  constituting the holding portion  11 . Since the position restriction portion  31  restricts the position of the contact portion  30  in the direction orthogonal to the extension direction of the holding portion  11  when the socket terminal  20  is held in the holding portion  11 , it is possible to prevent the one end portion  211  of the terminal body  21  from ratting. This in turn makes it possible to increase contact reliability of the socket terminal  20  with respect to the plug terminal  120 . 
     The bent portion  38  that is bent away from the center line CL 1  in the width direction of the terminal body  21  is provided at the distal end portion  36  of the resilient contact portion  33  adjacent to the position restriction portion  31 . This bent portion  38  allows, when the plug terminal  120  is inserted into the holding portion  11 , the resilient contact portion  33  to resiliently deform with ease in the width direction of the terminal body  21  and in the direction away from the center line CL 1 . 
     The contact portion  30  has the pair of resilient contact portions  33  provided at the one end portion and the other end portion in the width direction of the terminal body  21  and arranged symmetrically with respect to the center line CL 1 . This allows the pair of resilient contact portions  33  to clamp the plug terminal  120  inserted into the holding portion  11 , which in turn makes it possible to further increase the contact reliability of the socket terminal  20  with respect to the plug terminal  120 . 
     The position restriction portion  31  is configured to restrict the position through contact between the outer peripheral surface of the annular band portion  34  and the inner peripheral surface  13  of the housing  10  when the position restriction portion  31  is held in the holding portion  11 . This makes it possible to more reliably prevent the one end portion  211  of the terminal body  21  from ratting. 
     Since the connector  1  includes the socket terminal  20 , it is possible to realize the connector  1  that is high in contact reliability. 
     Note that the locking portion of the housing  10  is not limited to the cutout portion  12  and may be capable of locking to the lance portion  40  of the socket terminal  20  in the extension direction of the center line CL 1  of the socket terminal  20 . 
     It is not limited to the configuration where the locking portion includes four cutout portions  12  each associated with a corresponding one of the holding portions  11 , but the locking portion  12  may include, for example, two cutout portions  12  each associated with a corresponding one of two adjacent holding portions  11 . 
     It is not limited to the configuration where the position restriction portion  31  of the contact portion  30  is provided at the tip of the terminal body  21  adjacent to the one end portion  211 . The position restriction portion  31  may be provided at any position between the tip of the terminal body  21  adjacent to the one end portion  211  and the resin positioning portion  50 . 
     It is not limited to the configuration where the annular band portion  34  of the position restriction portion  31  has an approximately uniform width W, but the annular band portion  34  may have a plurality of different widths. That is, the annular band portion  34  may have any shape as long as the annular band portion  34  can restrict, with its outer peripheral surface, the position of the contact portion  30  in the direction orthogonal to the extension direction of the holding portion  11 . 
     The resilient contact portion  33  may come into contact with the plug terminal  120  inserted into the holding portion  11  to resiliently deform in the width direction of the terminal body  21  and away from the center line CL 1 . For example, the shape of the resilient contact portion  33  is not limited to a flat plate shape, but may be a plate shape curved along the annular band portion  34  of the position restriction portion  31 , and the proximal end portion  37  may be connected to the resin positioning portion  50  rather than the terminal body  21 . 
     Further, it is not limited to the configuration where the resilient contact portion  33  is provided as a pair on both sides in the width direction of the terminal body  21 , but the resilient contact portion  33  may be provided at least at one end portion in the width direction of the terminal body  21 . 
     Further, it is not limited to the configuration where the resilient contact portions  33  are arranged symmetrically with respect to the center line CL 1 , but the resilient contact portions  33  may be arranged asymmetrically with respect to the center line CL 1 . 
     According to the embodiment, the first positioning lance  41  is the first positioning lance, the second positioning lance  42  is the second positioning lance, and the third positioning lance  43  is the third positioning lance, but it is not limited to this configuration. For example, the first positioning lance  41  may be the second positioning lance, the second positioning lance  42  may be the third positioning lance, and the third positioning lance  43  may be the first positioning lance. 
     The lance portion  40  may have at least three positioning lances  41 ,  42  and  43 . For example, the lance portion  40  may have fourth positioning lances in addition to the first to third positioning lances  41 ,  42  and  43 . 
     The electric wire clamp portion  23 , the electric wire guide surface  24 , and the resin positioning portion  50  may be eliminated in accordance with the design of the socket terminal  20  or the like. 
     The guide wall portion  51  of the resin positioning portion  50  may have a tubular shape, and the shape is not limited to a cylinder shape. 
     The positioning wall portion  52  may be capable of closing the through hole  53  inside the guide wall portion  51 . That is, the shape of the positioning wall portion  52  is not limited to a disk shape, but may be a different shape, and the positioning wall portion  52  may be provided at any position inside the guide wall portion  51  in the extension direction of the center line CL 1  of the socket terminal  20 . 
     It is not limited to the configuration where the positioning wall portion  52  is formed by cutting and raising from a side adjacent to the lance portion  40  toward the contact portion  30 , but as shown in  FIG. 11 , the positioning wall portion  52  may be formed by cutting and raising from a side adjacent to the contact portion  30  toward the lance portion  40 . As described above, forming the positioning wall portion  52  by cutting and raising from a side adjacent to the contact portion  30  toward the lance portion  40  makes it possible to more reliably prevent the resin-filled portion  60  from being formed in the contact portion  30 . 
     The locking protrusion portion  54  of the positioning wall portion  52  may be provided at the cut and raised portion of the positioning wall portion  52 , and it is not limited to the configuration where the locking protrusion portion  54  and the uncut portion  56  of the positioning wall portion  52  are arranged on opposite sides of the positioning wall portion  52  in the radial direction from the center of the positioning wall portion  52 . 
     It is not limited to the configuration where the positioning wall portion  52  is formed by cutting and raising part of the terminal body  21 . If possible, the positioning wall portion  52  may be formed by cutting and raising part of the guide wall portion  51  or may be formed by cutting and raising part the terminal body  21  and part of the guide wall portion  51 . 
     In the embodiment, the socket terminal  20  as an example of the connector terminal and the socket connector  1  including the socket terminal  20  have been described, but the present disclosure without the contact portion  30  is applicable to the plug terminal  120  shown in  FIG. 12  and a plug connector including the plug terminal  120 . That is, the plug terminal  120  is identical to the socket terminal  20  in configuration except for the contact portion  130  with an approximately cylinder shape extending along the center line CL 1 . 
     Although the various embodiments of the present disclosure have been described in detail with reference to the drawings, a description will be given in conclusion of various aspects of the present disclosure. Note that the following description will be given as an example with the reference numerals attached. 
     A connector terminal  20  according to a first aspect of the present disclosure that can be held in a holding portion  11  of a connector  1  having a housing  10 , which has insulation properties and in which the holding portion  11  is provided, and that can connect an electric wire  2 , the connector terminal comprises: 
     a terminal main body  21  extending along a center line CL 1 ; 
     a contact portion  30  provided at a first end portion  211  of the terminal main body  21  in an extension direction of the terminal body  21 ; 
     a lance portion  40  provided at a second end portion  212  of the terminal main body  21  in the extension direction of the terminal body and configured to position the connector terminal  20  in the holding portion  11  in an extension direction of the center line CL 1 ; 
     a connection portion  22  that is disposed between the contact portion  30  and the lance portion  40  and to which a conductor portion  5  of the electric wire  2  can be connected from the lance portion  40  side; and 
     a resin positioning portion  50  disposed between the contact portion  30  and the connection portion  22  and configured to position a resin-filled portion  60  extending from the lance portion  40  toward the contact portion  30 , wherein 
     the resin positioning portion  50  includes 
     a guide wall portion  51  with a tubular shape having a through hole  53  extending along the center line CL 1 , and 
     a positioning wall portion  52  formed by cutting and raising at least one of a part of the terminal main body  21  and a part of the guide wall portion  51  and configured to close the through hole  53  inside the guide wall portion  51  in the extension direction of the center line CL 1 , 
     the positioning wall portion  52  includes a locking protrusion portion  54  protruding from the positioning wall portion  52  toward the outside of the resin positioning portion  50  in a direction intersecting the extension direction of the center line CL 1 , and 
     the guide wall portion  51  includes a locking recess portion  55  that locks the locking protrusion portion  54  to restrict the position of the positioning wall portion  52  relative to the guide wall portion  51 . 
     With the connector terminal  20  according to the first aspect, the resin positioning portion  50  includes the guide wall portion  51  with a tubular shape having the through hole  53  extending along the center line CL 1 , and the positioning wall portion  52  formed by cutting and raising part of the terminal main body  21  and configured to close the through hole  53  inside the guide wall portion  51  in the extension direction of the center line CL 1 . The positioning wall portion  52  includes the locking protrusion portion  54  protruding from the positioning wall portion  52  toward the outside of the resin positioning portion  50 , and the guide wall portion  51  includes the locking recess portion  54  that locks the locking protrusion portion  54  to restrict the position of the positioning wall portion  52  relative to the guide wall portion  51 . This allows the positioning wall portion  52  to prevent the resin-filled portion  60  from being formed in the contact portion  30  even when, for example, resin flows from a side adjacent to the lance portion  40  into the resin positioning portion  50  when molding the cover portion  3  of the resin, which in turn makes it possible to suppress a reduction in connectivity of the connector terminal  20  due to the resin. 
     In the connector terminal  20  according to a second aspect of the present disclosure, 
     the positioning wall portion  52  is formed by cutting and raising from a side adjacent to the contact portion  30  toward the lance portion  40 . 
     With the connector terminal  20  according to the second aspect, it is possible to more reliably prevent the resin-filled portion  60  from being formed in the contact portion  30 . 
     In the connector terminal  20  according to a third aspect of the present disclosure, 
     the guide wall portion  51  has a cylinder shape having the through hole  53  with a columnar shape, 
     the positioning wall portion  52  has a disk shape, and 
     the locking protrusion portion  54  and an uncut portion  56  of the positioning wall portion  52  are arranged on opposite sides of the positioning wall portion  52  in a radial direction with respect to a center of the disk shape. 
     With the connector terminal  20  according to the third aspect, it is possible to more reliably restrict the position of the positioning wall portion  52  relative to the guide wall portion  51 . 
     A connector  1  according to a fourth aspect of the present disclosure includes: 
     the connector terminal  20 ; and 
     the housing  10  having the holding portion  11  in which the connector terminal  20  is held. 
     Since the connector  1  according to the fourth aspect includes the connector terminal  20 , it is possible to realize the connector  1  that is high in connectivity. 
     Note that suitably combining any of the various embodiments or any of the various modifications makes it possible to achieve effects possessed by each of the embodiments or the modifications. Further, combinations of the embodiments, combinations of the modifications, or combinations of the embodiments and the modifications are possible, and combinations of features in different embodiments or modifications are also possible. 
     While the present disclosure has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, it will be apparent to those skilled in the art that various changes and modifications may be made. Unless such changes and modifications depart from the scope of the present disclosure as set forth in the accompanying claims, the changes and modifications should be construed as being included within the scope of the present disclosure. 
     INDUSTRIAL APPLICABILITY 
     The connector terminal according to the present disclosure is applicable to, for example, a machine tool for automobile. 
     Further, the connector according to the present disclosure is applicable to, for example, a machine tool for automobile. 
     REFERENCE SIGNS LIST 
     
         
         
           
               1 . connector 
               2 . electric wire 
               3 . cover portion 
               4 . fixing portion 
               5 . conductor portion 
               6 . insulation portion 
               10 . housing 
               101 . outer end portion 
               102 . inner end portion 
               103 . opening portion 
               11 . holding portion 
               12 . cutout portion (an example of locking portion) 
               13 . inner peripheral surface 
               20 . socket terminal (an example of connector terminal) 
               21 . terminal body 
               211 . first end portion (one end portion) 
               212 . second end portion (other end portion) 
               213 . plug terminal holding portion 
               22 . connection portion 
               23 . electric wire clamp portion 
               24 . electric wire guide surface 
               26 . terminal guide surface 
               30 ,  130 . contact portion 
               31 . position restriction portion 
               33 . resilient contact portion 
               34 . annular band portion 
               36 . distal end portion 
               37 . proximal end portion 
               38 . bent portion 
               40 . lance portion 
               41 . first positioning lance 
               411 . bent portion 
               42 . second positioning lance 
               421 . bent portion 
               43 . third positioning lance 
               431 . bent portion 
               50 . resin positioning portion 
               51 . guide wall portion 
               52 . positioning wall portion 
               53 . through hole 
               54 . locking protrusion portion 
               55 . locking recess portion 
               56 . uncut portion 
               57 . through hole 
               60 . resin-filled portion 
               120 . plug terminal 
               201 . first member 
               202 . second member 
               203 . third member 
               204 ,  205 . outer side surface 
               551 ,  552 . recess portion 
             CL 1  to CL 3 . center line 
             W. width 
             L 1  to L 5 , L 11 , L 12 , L 21 , L 22 , L 31 , L 32 . imaginary straight line 
             D 1 , D 2 . thickness direction 
             θ 1  to θ 3 . angle 
             CP. center point