Patent Publication Number: US-2022239018-A1

Title: Terminal

Description:
TECHNICAL FIELD 
     The technology disclosed herein relates to a terminal. 
     BACKGROUND ART 
     A known terminal wire assembly includes a core wire exposed at an end of an electric wire and a terminal coupled to the core wire. The terminal may include a crimping portion that is crimped on the core wire that is exposed at the end of the electric wire. Such a terminal is produced by shearing and bending a sheet metal into a predefined shape by a press machine. 
     To crimp the terminal on the core wire, the following steps may be performed. The terminal is placed on a lower die of dies that are relatively movable in the vertical direction. The core wire exposed at the end of the electric wire is placed on the crimping portion of the terminal. The one of the dies or both dies are moved closer to each other. The crimping portion is crimped by a crimping portion of the upper die and a placing portion of the lower die until the crimping portion of the terminal is deformed and crimped on the core wire. Through these steps, the terminal is coupled to the end of the terminal (see Patent Document 1). 
     RELATED ART DOCUMENT 
     [Patent Document] 
     [Patent Document 1] 
     Japanese Unexamined Patent Application Publication No. 2005-50736 
     SUMMARY OF THE INVENTION 
     Problem to be Solved by the Invention 
     According to the technology described above, a relatively large equipment such as dies and a jig for crimping the crimping portion of the terminal on the core wire of the electric wire may be required. Therefore, a production cost may be increased by an investment on the equipment. 
     The technology described herein was made in view of the above circumstances. An object is to provide a technology for coupling a terminal to an electric wire without using a relatively large jig. 
     Means for Solving the Problem 
     The present disclosure relates to a terminal. The terminal includes a terminal body and a slider. The terminal body is formed by processing a metal sheet. The terminal body is coupled to a front end of an electric wire with respect to an extending direction in which the electric wire extends. The terminal body holds the electric wire. The slider is slidable in the extending direction relative to the terminal body. The terminal body includes connecting tabs that include contact surfaces contactable with the electric wire. Each of the connecting tabs has a cantilever shape. The slider includes pressing portions that press the connecting tabs so that the connecting tabs deform and the contact surfaces contact the electric wire when the slider is slid. The connecting tabs include burrs that are produced during processing of the metal sheet. The burrs protrude from the contact surfaces toward the electric wire. 
     Advantageous Effects of Invention 
     According to the technology described herein, the terminal is coupled to the electric wire without a relatively large jig. Further, proper connecting condition is maintained using the burrs that are produced on the metal sheet. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a connector according to an embodiment. 
         FIG. 2  is a cross-sectional view of the connector. 
         FIG. 3  is a perspective view of a female terminal illustrating a terminal body and a slider at a first condition. 
         FIG. 4  is a side view of the female terminal illustrating the terminal body and the slider at the first position. 
         FIG. 5  is a plan view of the female terminal with a partial cross-sectional view illustrating the terminal body and the slider at the first position. 
         FIG. 6  is a perspective view of the female terminal illustrating the terminal body the slider at the first position. 
         FIG. 7  is a side view of the female terminal illustrating the terminal body and the slider at a second position. 
         FIG. 8  is a perspective view of the terminal body. 
         FIG. 9  is a side view of the terminal body. 
         FIG. 10  is a magnified partial cross-sectional view illustrating serrations. 
         FIG. 11  is a magnified partial cross-sectional view illustrating variations of the serrations. 
         FIG. 12  is a magnified partial cross-sectional view illustrating variations of the serrations. 
         FIG. 13  is a back view of the slider. 
         FIG. 14  is a perspective view of the slider. 
         FIG. 15  is a top view of the slider. 
         FIG. 16  is a side view of the slider. 
         FIG. 17  is a front view of the slider. 
         FIG. 18  is a front view of the slider including a contact portion with an altered height. 
         FIG. 19  is a perspective view of a connector housing. 
         FIG. 20  is a perspective view of the connector housing with the female terminal attached. 
         FIG. 21  is a cross-sectional view of the connector housing with the female terminal attached. 
         FIG. 22  is a perspective view of the connector housing with a rear holder attached at a temporary position. 
         FIG. 23  is a cross-sectional view of the connector housing with a rear holder attached and at the temporary position. 
         FIG. 24  is a perspective view illustrating an electric wire inserted. 
         FIG. 25  is a cross-sectional view illustrating the electric wire inserted. 
         FIG. 26  is a cross-sectional view illustrating the slider moved from the first position to the second position. 
     
    
    
     MODES FOR CARRYING OUT THE INVENTION 
     Brief Description of Embodiments 
     First, embodiments of the technology described herein will be listed and described. 
     (1) The present disclosure relates to a terminal. The terminal includes a terminal body and a slider. The terminal body is formed by processing a metal sheet. The terminal body is coupled to a front end of an electric wire with respect to an extending direction in which the electric wire extends. The terminal body holds the electric wire. The slider is slidable in the extending direction relative to the terminal body. The terminal body includes connecting tabs that include contact surfaces contactable with the electric wire. Each of the connecting tabs has a cantilever shape. The slider includes pressing portions that press the connecting tabs so that the connecting tabs deform and the contact surfaces contact the electric wire when the slider is slid. The connecting tabs include burrs that are produced during processing of the metal sheet. The burrs protrude from the contact surfaces toward the electric wire. 
     According to the configuration, the connecting tabs press the electric wire by moving the slider in the inserting direction. The connecting tabs are electrically connected to the electric wire. The electric wire is electrically connected to the terminal without a relatively large jig. Further, the connecting tabs to maintain the electrical connection with the electric wire include burrs that are produced during the shearing. At least some of the burrs protrude from the contact surfaces toward the electric wire and dig into the electric wire. Therefore, proper connecting condition is maintained. 
     (2) The contact surfaces of the connecting tabs may be opposite to each other. The slider may have a tubular shape to cover the connecting tabs from an outer side. 
     In the configuration, the electric wire is sandwiched between the connecting tabs. A reaction force is received by the slider and thus the proper connecting condition is maintained. 
     (3) The connecting tabs may include folded portions that may be formed by folding sections of the metal sheet. The folded portions may include sections of the contact surfaces that contact the electric wire. The burrs may protrude from the sections of the contact surfaces toward the electric wire. 
     The thicknesses of portions of the connecting tabs including the folding portions are greater and thus the connecting tabs contact the electric wire with a greater pressing force. Because the burrs are at such portions, the burrs are deeply dig into the electric wire. 
     (4) The connecting tabs may be parallel to each other. The contact surfaces may be opposite to each other. The folded portions may be displaced from each other in an inserting direction in which the electric wires inserted into the terminal body on the contact surfaces that are opposite to each other. According to the configuration, the electric wire that are sandwiched between the connecting tabs is bent and further firmly held. 
     (5) In such a configuration, the burrs may be at edges of the folded portions of the connecting tabs displaced from each other. The edges of the folded portions may be opposite to each other. Because the electric wire is bent by the edges and firmly pressed against the folded portions, the burrs at the edges deeply may dig into the electric wire. 
     (6) The pressing portions may protrude inward in the slider. The slider may include a narrow portion and a wide portion. The narrow portion of the slider may have a less internal dimension in a pressing direction in which the pressing portions press the connecting tabs. The wide portion may be closer to a front than the pressing portion with respect to an inserting direction in which the electric wire is inserted into the terminal body. The wide portion of the slider may have a greater internal dimension in the pressing direction than the less internal dimension of the narrow portion. 
     According to the configuration, the connecting tabs are pressed by the pressing portions in the narrow portion in the pressing direction by sliding the slider until the narrow portion is moved to a position corresponding to the connecting tabs. 
     (7) One of the terminal body and the sider or another one of the terminal body and the slider may include a first position holding mechanism and a second position holding mechanism. The first position holding mechanism may hold the slider at a first position at which the wide portion is held while contacting the terminal body but the connecting tabs are not in contact the electric wire not contacting the electric wire. The second position holding mechanism may hold the slider at a second position at which the connecting tabs are deformed by the pressing portions and in contact with the electric wire. 
     According to the configuration, the electric wire can be inserted while the terminal body and the terminal body are held at the first position by the first position holding mechanism and then the slider is moved and the terminal body and the slider are held at the second position. According to the configuration, the connecting tabs of the terminal body remain contacted with the electric wire at the second position. 
     (8) The slider may include a sloped guide surface at an end of the slider on an opposite side from the wide portion. An amount of projection of the sloped guide surface may increase toward the pressing portion so that the front end of the electric wire that is inserted into the terminal body is guided and placed in a predefined posture. 
     (9) The slider may include a jig contact section that receives an external jig to move the slider in the inserting direction. According to the configuration, the slider is movable from outside using the jig. 
     (10) Serrations may be formed in the contact surfaces to dig into a surface of the electric wire while the connecting tabs press the electric wire. 
     With the serrations digging into the surface of the electric wire, the strength to hold the electric wire by the terminal increases. Further, an insulating film that may be formed on the surface of the electric wire may be ripped by the serrations. Therefore, an electrical resistance between the terminal and the electric wire can be reduced. 
     (11) The serrations may include grooves that extend in a direction perpendicular to the inserting direction. The serrations may be arranged at intervals in the inserting direction. 
     According to the configuration, the electric wire is held at multiple points with respect to the inserting direction with the serrations. Therefore, the strength to hold the electric wire by the terminal increases. Further, the electric wire is electrically connected to the terminal at multiple points with respect to the inserting direction with the serrations. Therefore, the electrical resistance between the terminal and the electric wire can be reduced. 
     (12) A wire guide recess may be formed in the contact surface. The wire guide recess may extend in the inserting direction. The electric wire is easily disposed in the contact surface by placing the electric wire in the wire guide recess. 
     (13) The terminal body may include a terminal window through which the end of the electric wire at a predefined position is detectable when the electric wire is at the connecting tabs. According to the configuration, the end of the electric wire can be detected through the terminal window. Whether the electric wire is coupled to the terminal is easily inspected. 
     (14) A terminal wire assembly according to the present disclosure includes the terminal according to any one of (1) to (13) described above and an electric wire coupled to the terminal. 
     (15) The connector according to the present disclosure includes a connector housing and a rear holder. The connector housing includes cavities in which terminals are held. The rear holder is attached to a rear portion of the connector housing in an inserting direction in which the terminals are inserted into the cavities. The rear holder includes insertion holes that communicate with the cavities. 
     According to the configuration, the terminals are held in the connector housing with the terminals while removal of the terminals from the connector housing is restricted by the rear holder. 
     (16) The rear holder may be removable in the inserting direction. The rear holder may include slider pushing portions that contact the sliders from the rear with respect to the inserting direction and push the slider forward with respect to the inserting direction to move the sliders from the first position to the second position when the rear holder is moved from the rear to the front with respect to the inserting direction. 
     According to the configuration, the sliders can be pushed by the slider pushing portions of the rear holder when the rear holder is moved. The electric wires are electrically connected to the terminals concurrently with the movement of the rear holder. 
     (17) The terminal bodies may include terminal windows through which ends of the electric wires at predefined positions can be detectable when the electric wires are at the connecting tabs. The connector housing may include connector windows through which the terminal windows communicate with the outside. 
     According to the configuration, whether the ends of the electric wires are at the predefined positions can be inspected through the terminal windows via the connector windows. 
     Detailed Description of Embodiments 
     Embodiments of the technology described herein will be described. The present invention is not limited to the embodiments. Modifications within technical scope of the claimed invention and equivalents of the technical scope of the claimed invention are considered to be within the technical scope of the present invention. 
     An embodiment of the technology described herein will be described with reference to  FIGS. 1 to 26 . A connector  10  according to this embodiment holds a female terminal  12  (an example of a terminal) coupled to an end of an electric wire  11 . A terminal wire assembly according to this embodiment includes the female terminal  12  and the electric wire  11  to which the female terminal  12  is coupled. In the following description, it is considered that an Z arrow, a Y arrow, and an X arrow in the drawing point the upper side the front side, and the left side, respectively. Regarding components having the same configuration, some of the components may be indicated by reference signs and others may not be indicated by the reference signs. 
     (Electric Wire  11 ) 
     As illustrated in  FIG. 2 , the electric wire  11  includes a core wire  13  and an insulating sheath  14  that covers an outer surface of the core wire  13 . The insulating sheath  14  is made of synthetic resin having insulating properties. At an end of the electric wire  11 , the insulating sheath  14  is ripped and a section of the core wire  13  is exposed. The core wire  13  in this embodiment is a single core wire including only one metal wire. Alternatively, a twisted wire including multiple metal fine wires that are twisted together may be used for the core wire  13 . The metal of which the metal wire is made may be selected from copper, copper alloy, aluminum, aluminum alloy, and any other kinds of meatal where appropriate. The core wire  13  in this embodiment may be made of copper or copper alloy. 
     (Terminal Body  15 ) 
     As illustrated in  FIGS. 2 to 4 , the female terminal  12  includes a terminal body  15  and a slider  16 . The terminal body  15  is made of metal. The slider  16  is slidable relative to the terminal body  15 . The terminal body  15  and the slider  16  in this embodiment are produced by shearing and bending a sheet metal into a predefined shape by a pressing machine. The sheet metal from which the terminal body  15  and the slider  16  are produced may be made of metal selected from copper, aluminum, aluminum alloy, stainless steel, and other kinds of metal where appropriate. The terminal body  15  in this embodiment may be made of copper or copper alloy. The terminal body  15  may be plated. The plating metal may be selected from tin, nickel, silver, and any other kinds of metal where appropriate. The terminal body  15  according to this embodiment is tin-plated. 
     As illustrated in  FIGS. 8 and 9 , the terminal body includes a tubular connecting portion  17 , an upper connecting tab  18 A, and a lower connecting tab  18 B. A mating male terminal (not illustrated) is inserted into the tubular connecting portion  17 . The upper connecting tab  18 A and the lower connecting tab  18 B extend rearward from the tubular connecting portion  17 . The tubular connecting portion  17  has a rectangular tubular shape and extends in the front-rear direction. The tubular connecting portion  17  has an opening through which the mating male terminal is inserted. 
     An elastic connecting tab  19  projects forward from the rear section of the tubular connecting portion  17  inside the tubular connecting portion  17  (see  FIG. 2 ). The male terminal inserted in the tubular connecting portion  17  contacts the elastic connecting tab  19 . 
     A base portion  20  is behind the tubular connecting portion  17 . The base portion  20  has a rectangular tubular shape. The upper connecting tab  18 A (an example of a connecting tab) projects rearward from a rear end portion of an upper wall of the base portion  20 . The lower connecting tab  18 B projects rearward from a rear end portion of a lower wall of the base portion  20 . The upper connecting tab  18 A and the lower connecting tab  18 B have elongated shapes extending in the front-rear direction. The electric wire  11  can be inserted into the base portion  20  through a gap between the upper connecting tab  18 A and the lower connecting tab  18 B from the front end to the rear end, that is, the Y direction (an inserting direction in which the electric wire is inserted). Lengths of the upper connecting tab  18 A and the lower connecting tab  18 B measuring in the front-rear direction are about equal to each other. 
     Each of the upper connecting tab  18 A and the lower connecting tab  18 B has a cantilever shape such that a section closer to a free end is deformable in the vertical direction with a rear end of the base portion  20  as a fulcrum. An entire area of a lower surface of the upper connecting tab  18 A is defined as a contact surface  21 A. An entire area of an upper surface of the lower connecting tab  18 B is defined as a contact surface  21 B that contacts the core wire  13 . 
     As illustrated in  FIGS. 8 and 10 , a lower folded portion  23 B is formed on a rear portion (an end) of the lower connecting tab  18 B by folding a section of the metal sheet forward so that a thickness is partially doubled of a thickness of a front portion. A section of the contact surface  21 B, that is, a surface of the lower folded portion  23 B includes multiple serrations  22 B that include grooves extending in a direction perpendicular to the inserting direction, that is, the right-left direction. The serrations  22 B are separated from each other in the front-rear direction and parallel to each other. 
     An end of the upper connecting tab  18 A has a thickness equal to a thickness of the metal sheet. A lower surface of the upper connecting tab  18 A includes multiple serrations  22 A that include grooves similar to the grooves of the serrations  22 B of the lower connecting tab  18 B. The serrations  22 A are separated from each other in the front-rear direction and parallel to each other (see  FIG. 10 ). The serrations  22 B are displaced from the serrations  22 A in the front-rear direction so that the serrations  22 B do not overlap the serrations  22 A. 
     An upper folded portion  23 A is formed on an area of the upper connecting tab  18 A more to the front than the lower folded portion  23 B of the lower connecting tab  18 B. The upper folded portion  23 A is formed by folding a tongue-shaped section of the metal sheet, from which the upper connecting tab  18 A is formed. The tongue-shaped section projects from the right edge of the metal sheet (a farther side in  FIG. 10 ). The tongue-shaped section is folded toward a near side onto the lower surface of the upper connecting tab  18 A. As illustrated in  FIG. 10 , the upper folded portion  23 A and the lower folded portion  23 B are displaced from each other in the front-rear direction. The upper folded portion  23 A and the lower folded portion  23 B are separated from each other with a gap that is slightly greater than the diameter of the core wire  13  of the electric wire  11 . 
     As illustrated in  FIG. 13 , a middle section of the contact surface  21 B of the lower connecting tab  18 B with respect to the right-left direction is concaved to form a wire guide recess  48  that extends in the inserting direction in which the electric wire  11  is inserted. 
     As described earlier, the terminal body  15  is produced by shearing and bending the sheet metal. Minute protrusions that protrude from sheared edges of the metal sheet toward a front with respect to a shearing direction and curved surfaces that are curved from the sheared edges with respect to the shearing direction, that is, burrs and shear drops may be produced. Tips of the burrs are schematically illustrated and indicated by reference signs  50  in  FIG. 10 . The tips are shape. In this embodiment, the burrs  50  produced at the contact surfaces  21 A and  23 B of the upper connecting tab  18 A and the lower connecting tab  18 B protrude toward the core wire  11  so that the burrs  50  dig into the oxide film on the surface of the core wire  13  and contact the metal surface of the core wire  13 . As illustrated in  FIG. 10 , the burrs  50  are formed at the edges of the contact surfaces  21 A and  21 B in front of and at the rear of the upper folded portion  23 A and the rear edge of the lower folded portion  23 B. The burrs are located at the opposed edges of the folded portions  23 A and  23 B that are displaced from each other in the front-rear direction. 
     The serrations  22 A of the upper connecting tab  18 A and the serrations  22 B of the lower connecting tab  18 B rip sections of the oxide film on the surface of the core wire  13  so that the contact surfaces  21 A and  21 B contact the metal surface of the core wire  13 . 
     Shapes of the serrations  22 A and the serrations  22 B may be selected from shapes illustrated in  FIGS. 10 to 12  where appropriate. In this embodiment, the grooves of the serrations  22 A and  22 B have a V-shaped cross section as illustrated in  FIG. 10 . The serrations  22 A and  22 B may have a wavy shape that gently waves in the front-rear direction illustrated in  FIG. 11 . The grooves of the serrations  22 A and  22 B may have a triangular cross section as illustrated in  FIG. 12 . The serrations  22 A and  22 B in  FIG. 12  are defined by rear walls that are vertical and front walls that are angled so that a distance between each rear wall and the corresponding front wall increases toward the rear. With this configuration, the rear walls of the serrations  22 A and  22 B dig into the surface of the core wire  13  and a strength of the female terminal  12  to hold the electric wire  11  increases. 
     The serrations  22 A and  22 B may have shapes other than the shapes described above. The serrations  22 A and  22 B may include U-shaped grooves. The grooves of the serrations  22 A and  22 B may have shapes that are defined by bottom walls and side walls that are perpendicular to the bottom walls. 
     The terminal body  15  includes a terminal window  24  behind the tubular connecting portion  17  and in front of the base portion  20 . The terminal window  24  opens upward. The front end of the core wire  13  is detectable from outside through the terminal window  24  when the electric wire  11  is at a predefined position, that is, the electric wire  11  is passed through the gap between the upper connecting tab  18 A and the lower connecting tab  18 B to get closer to the terminal window  24 . Detectable from outside means that the front end is viewable to an inspector or a camera from outside or the front end of the core wire  13  is electrically detectable with a probe (not illustrated) inserted from outside. 
     (Slider  16 ) 
     As illustrated in  FIGS. 14 to 18 , the slider  16  has a rectangular tube shape that extends in the front-rear direction. The slider  16  may be prepared by a known method such as cutting, casting, and pressing. The metal of which the slider  16  is made may be selected from any kinds of metal including copper, copper alloy, aluminum, aluminum alloy, and stainless steel where appropriate. The slider  16  in this embodiment is prepared by pressing stainless sheet metal. Surfaces of the slider  16  may be plated. Metal used for plating may be selected from any kinds of metal including tin, nickel, and silver where appropriate. 
     A cross section of an inner portion of the slider  16  along a plane perpendicular to the Y direction is equal to or slightly greater than the cross section of an outer portion of the terminal body  15  in which the upper connecting tab  18 A and the lower connecting tab  18 B are provided. The slider  16  is in the rectangular tubular shape to cover a pair of the upper connecting tab  18 A and the lower connecting tab  18 B from the outer side. 
     As illustrated in  FIG. 21 , the slider  16  includes an upper pressing portion  25 A that protrudes downward from a rear section of an upper wall. The slider  16  includes a lower pressing portion  25 B that protrudes upward from a section of the lower wall opposite the upper pressing portion  25 A. A portion of the slider  16  including the upper pressing portion  25 A and the lower pressing portion  25 B has an internal dimension measuring in the top-bottom direction smaller than a dimension of a portion of the slider  16  closer to the front. 
     The portion in front of the portion including the upper pressing portion  25 A and the lower pressing portion  25 B has a cross section equal to or slightly greater than the cross section of the portion of the terminal body  15  including the upper connecting tab  18 A and the lower connecting tab  18 B as described above. Therefore, the portion is set to a position at which the portion covers the rear end of the terminal body  15  from outside, that is, the portion is fitted on the rear end of the terminal body  15 . At the position, the upper pressing portion  25 A and the lower pressing portion  25 B do not contact the upper connecting tab  18 A and the lower connecting tab  18 B and thus the upper connecting tab  18 A and the lower connecting tab  18 B are not deformed inward (see  FIG. 21 ). The portion of the slider  16  in front of the upper pressing portion  25 A and the lower pressing portion  25 B will be referred to as a wide portion  16 A hereinafter. The portion of the slider  16  including the upper pressing portion  25 A and the lower pressing portion  25 B will be referred to as a narrow portion  16 B. The narrow portion  16 B has a less dimension in a pressing direction in which the upper pressing portion  25 A and the lower pressing portion  25 B press the upper connecting tab  18 A and the lower connecting tab  18 B (the top-bottom direction). 
     At the overlapping position at which a wide portion  16 A is fitted only on the rear portion of the terminal body  15 , the upper connecting tab  18 A and the lower connecting tab  18 B do not deform. Because a distance between the upper connecting tab  18 A and the lower connecting tab  18 B is greater than the diameter of the core wire  13  when the upper connecting tab  18 A and the lower connecting tab  18 B are not deformed, the electric wire  11  can be inserted into the terminal body  15  without difficulty. 
     A right wall and a left wall of the slider  16  include temporary receiving holes  26  closer to the front edge and permanent receiving holes  27  behind the temporary receiving holes  26 . Holding protrusions  28  on the right wall and the left wall of the terminal body  15  can be elastically held by the temporary receiving holes  26  or the permanent receiving holes  27 . 
     When the holding protrusions  28  of the terminal body  15  are held by the temporary receiving holes  26 , the upper pressing portion  25 A and the lower pressing portion  25 B of the slider  16  are separated rearward from the rear edges of the upper connecting tab  18 A and the lower connecting tab  18 B of the terminal body  15 . Therefore, the upper connecting tab  18 A and the lower connecting tab  18 B do not deform. This position of the slider  16  is referred to as a first position. A holding mechanism including the temporary receiving holes  26  and the holding protrusions  28  to hold the slider  16  at the first position is referred to as a first position holding mechanism  26 A (see  FIG. 4 ). 
     When the slider  16  is pushed forward from the first position, the holding protrusions  28  of the terminal body  15  are removed from the temporary receiving holes  26  of the slider  16  and fitted in the permanent receiving holes  27  on the front side. The narrow portion  16 B is moved to a position corresponding to the upper connecting tab  18 A and the lower connecting tab  18 B. The upper pressing portion  25 A and the lower pressing portion  25 B of the slider  16  run on the upper connecting tab  18 A and the lower connecting tab  18 B of the terminal body  15 . The upper connecting tab  18 A and the lower connecting tab  18 B deform to press the electric wire  11  (see  FIG. 2 ). In this description, a position of the slider  16  described above is referred to as a second position. The permanent receiving holes  27  of the slider  16  and the holding protrusions  28  are referred to as a second position holding mechanism  26 B (see  FIG. 6 ). 
     As illustrated in  FIGS. 17 and 18 , the height of the upper pressing portion  25 A and the height of the lower pressing portion  25 B may be altered for an electric wire  11  including a core wire  13  having a different diameter can be coupled to the female terminal  12  even when a terminal body  15  having the same shape is used. For example, as illustrated in  FIG. 18 , the height of the upper pressing portion  25 A and the height of the lower pressing portion  25 B are less than the heights of those illustrated in  FIG. 17 . Although the electric wire  11  illustrated in  FIG. 18  includes the core wire  13  having a diameter greater than that of the core wire  13  illustrated in  FIG. 17 , the electric wire  11  illustrated in  FIG. 18  can be coupled to the female terminal  12  using the terminal body  15  having the same shape as the terminal body  15  illustrated in  FIG. 17 . 
     When the slider  16  is at the second position relative to the terminal body  15  ( FIGS. 2 and 7 ), the upper folded portion  23 A on the upper connecting tab  18 A presses the core wire  13  from above. Because a section of the lower connecting tab  18 B opposite the upper folded portion  23 A with respect to the top-bottom direction has a less thickness, the core wire  13  of the electric wire  11  is bent by the upper folded portion  23 A and held. 
     The front end of the slider  16  includes a jig contact section  46 . The jig contact section  46  protrudes upward from the upper wall. The jig contact section  46  has a rectangular arch shape. The jig contact section  46  is hollow and in a cover shape. When a jig  45  contacts the jig contact section  46  from the rear and the slider  16  is pushed forward by the jig  45 , the slider  16  slides forward (see  FIG. 26 ). The jig  45  has an elongated plate or rod shape. The jig  45  is made of a known material including metal and synthetic resin. The jig  45  is relatively small in comparison to dies or equipment to move the dies. Therefore, an increase in cost related to the jig  45  is suppressed. 
     The slider  16  includes guide portions  47  that protrude inward from rear sections of the right wall and the left wall of the slider  16 . The guide portions  47  are formed such that a distance between the guide portions  47  decreased from the rear toward the front. The core wire  13  are slid on inner surfaces of the guide portions  47  and guided into a middle section of an inner space of the slider  16 . 
     (Connector  10 ) 
     As illustrated in  FIG. 1 , the connector  10  includes a connector housing  30  and a rear holder  31 . The connector housing  30  includes cavities  29  in which female terminals  12  are held. The rear holder  31  is attached to a rear end of the connector hosing  30 . 
     (Connector Housing  30 ) 
     As illustrated in  FIG. 19 , the connector housing has a rectangular block shape that is flat in the top-bottom direction and elongated in the right-left direction. The connector housing  30  is prepared by injecting molten synthetic resin having insulating properties and molding into a shape. The connector housing  30  includes the cavities  29  that extends in the front-rear direction and in which the female terminals  12  are held. The cavities  29  are at intervals in the right-left direction and in double-tier arrangement. The cavities  29  in an upper tier and the cavities  29  in a lower tier are displaced from each other in the top-bottom direction. The number of the cavities  29  and the number of tiers can be altered. 
     Front ends of the cavities  29  have openings to open forward. Male terminals can be inserted through the openings. Rear ends of the cavities  29  have openings to open rearward. The female terminals  12  can be inserted from the rear through the opening. 
     As illustrated in  FIG. 2 , connector windows  33  are provided that are through holes in a wall that defines the cavities  29 . The connector windows  33  are at positions opposite terminal windows  24  of the female terminals  12  when the female terminals  12  are held in the cavities  29 . The terminal windows  24  are communicated with the outside through the connector windows  33 . The terminal windows  24  of the female terminals  12  can be detectable from outside through the connector windows  33 . Therefore, the front end of the core wire  13  can be detectable from outside through the connector windows  33  and the terminal windows  24 . 
     The connector housing  30  include a dividing wall  34  that separates the cavities  29  in the upper tier from the cavities  29  in the lower tier. The dividing wall  34  projects rearward from the rear edges of the cavities  29 . Partition walls  35  protrude from an upper surface and a lower surface of the dividing wall  34 . The partition walls  35  extend in the front-rear direction. Each partition wall  35  electrically isolates each female terminal  12  held in the corresponding cavity  29  from the female terminal  12  adjacent to the female terminal  12  in the right-left direction. 
     The connector housing  30  includes temporary holding locks  36  that protrude outward from rear sections of a right wall and a left wall of the connector housing  30 , respectively. Permanent holding locks  37  protrude outward from sections of the right wall and the left wall more to the front than the temporary holding locks  36 . 
     (Rear Holder  31 ) 
     The rear holder  31  has a box shape with an opening in the front side. The rear holder  31  is prepared by injecting molten synthetic resin having insulating properties and molding into a shape. The rear holder  31  is fitted on the rear portion of the connector housing  30 . The right wall and the left wall of the rear holder  31  include lock receiving portions  38  to which the temporary holding locks  36  and the permanent holding locks  37  of the connector housing  30  are elastically fitted. Each of the lock receiving portions  38  has a rectangular arch shape. 
     With the temporary holding locks  36  of the connector housing  30  fitted to the lock receiving portions  38  of the rear holder  31 , the rear holder  31  is held at the temporary holding position relative to the connector housing  30 . With the permanent holding locks  37  of the connector housing  30  fitted to the lock receiving portions  38  of the rear holder  31 , the rear holder  31  is held at the permanent holding position relative to the connector housing  30 . 
     The rear holder  31  includes insertion holes  39  at intervals in the right-left direction and in double-tier arrangement. Electric wires  11  are inserted in the insertion holes  39 . The insertion holes  39  are at positions corresponding to the cavities  29  of the connector housing  30 . An inner diameter of each insertion hole  39  is equal to or slightly larger than an outer diameter of the insulating sheath  14  of the electric wire  11 . 
     The rear holder  31  includes a hood portion  41  with an opening in the front side. The hood portion  41  is fitted on the connector housing  30 . The hood portion  41  includes projecting walls  42 A and  42 B that project forward from the rear portion of the hood portion  41 . The projecting walls  42 A and  42 B are located at the middle with respect to the top-bottom direction. The projecting walls  42 A and  42 B are separated from each other in the top-bottom direction. The distance between the projecting walls  42 A and  42 B in the top-bottom direction is equal to or slightly greater than the thickness of the dividing wall  34  of the connector housing  30 . 
     With the rear holder  31  held at the temporary holding position relative to the connector housing  30 , the projecting walls  42 A and  42 B of the rear holder  31  are more to the rear than the dividing wall  34  of the connector housing  30 . With the rear holder  31  held at the permanent holding position relative to the connector housing  30 , the dividing wall  34  of the connector housing  30  is fitted in a gap between the projecting walls  42 A and  42 B of the rear holder  31 . At this position, the rear holder  31  is less likely to be displaced in the top-bottom direction relative to the connector housing  30 . 
     Inner walls of the hood portion  41  has a smaller thickness in areas slightly rear than the front edge in comparison to other areas. Namely, the inner walls of the hood portion  41  include steps between areas closer to the front edge and rear areas. The steps are defined as slider pushing portions  43  that contact the rear edge  44  of the slider  16  from the rear when the rear holder  31  is moved from the temporary holding position to the permanent holding position relative to the connector housing  30 . When each slider pushing portion  43  contacts the rear edge  44  of the corresponding slider  16  at the first position and pushes the slider  16  forward, the slider  16  is moved to the second position. 
     First Example of Assembling of the Connector  10   
     A first example of assembling of the connector  10  according to this embodiment will be described. The assembling of the connector  10  is not limited to that described below. 
     The terminal body  15  and the slider  16  are prepared by a known method. The slider  16  is attached to the terminal body  15  from the rear with the wide portion  16 A on the front. An inner dimension of the wide portion  16 A in the top-bottom direction is equal to or slightly greater than a distance between the upper surface of the upper connecting tab  18 A and the lower surface of the lower connecting tab  18 B of the terminal body  15 . Therefore, the terminal body  15  can enter into the wide portion  16 A until the front edges of the upper connecting tab  18 A and the lower connecting tab  18 B contact the front edges of the upper pressing portion  25 A and the lower pressing portion  25 B (see  FIG. 21 ). 
     Immediately before the front edges of the upper connecting tab  18 A and the lower connecting tab  18 B contact the front edge of the upper pressing portion  25 A and the lower pressing portion  25 B, the front edge of the slider  16  contacts the holding protrusions  28  of the terminal body  15  from the rear and the sidewalls of the slider  16  recover. The holding protrusions  28  of the terminal body  15  are fitted in the temporary receiving holes  26  of the slider  16 . The slider  16  is held at the first position relative to the terminal body  15 . Through the above steps, the female terminal  12  is prepared (see  FIG. 3 ). 
     The connector housing  30  and the rear holder  31  are prepared by injecting molten synthetic resin and molding into shapes. The connector housing  30  is formed into the shape illustrated in  FIG. 19 . The connector housing  30  and the rear holder  31  combined into a shape are illustrated in  FIG. 22 . The female terminal  12  is inserted into the cavity  29  of the connector housing  30  from the rear before the rear holder  31  is attached to the connector housing  30  (see  FIGS. 20 and 21 ). 
     As illustrated in  FIGS. 22 and 23 , the rear holder  31  is attached to the rear portion of the connector housing from the rear. The front edge of the rear holder  31  contact the temporary holding locks  36  of the connector housing  30  from the rear and the front end of the rear holder deforms to open. The lock receiving portions  38  of the rear holder  31  are elastically fitted to the temporary holding locks  36  of the connector housing  30 . The rear holder  31  is held at the temporary holding position relative to the connector housing  30 . At this position, the slider pushing portion  43  of the rear holder  31  is in contact with the rear edge of the slider  16  or slightly separated from the rear edge of the slider  16  toward the rear. 
     The section of the insulating sheath  14  at the end of the electric wire  11  is ripped and a predefined length of the core wire  13  is exposed. The front end of the core wire  13  is inserted into the insertion hole  39  in the rear end of the rear holder  31  from the rear. 
     When the electric wire  11  is pushed further forward, the front end of the core wire  13  project forward out of the insertion hole  39  of the rear holder  31 . The front end of the core wire  13  is passed from the rear edge  44  of the slider  16  to the inner side of the slider  16 . The core wire  13  that contacts the guide portions  47  of the slider  16  is guided to the middle section of the slider  16 . When the electric wire  11  is pushed further forward, the front end of the core wire  13  enters into the inner side of the terminal body  15  and reaches the gap between the upper connecting tab  18 A and the lower connecting tab  18 B. 
     When the electric wire  11  is pushed further forward, the front end of the core wire  13  reaches a point under the terminal window  24  of the terminal body  15  (see  FIG. 25 ). The front end of the core wire  13  is detectable through the terminal window  24  that is visible through the connector window  33 . The front end of the core wire  13  may be detected through visual check or with probes. At the position, the insulating sheath  14  of the electric wire  11  in the insertion hole  39  of the rear holder  31 . 
     When the slider  16  is held at the first position relative to the terminal body  15  and the rear holder  31  is held at the temporary holding position relative to the connector housing  30 , the distance between the upper connecting tab  18 A and the lower connecting tab  18 B is greater than the outer diameter of the core wire  13 . Therefore, during the insertion of the core wire  13  into the connector  10 , the upper connecting tab  18 A and the lower connecting tab  18 B are less likely to exert friction on the core wire  13 . Therefore, a force required to insert the electric wire  11  into the connector  10  does not increase. 
     When the rear holder  31  is pushed forward, the front end of the rear holder  31  runs on the permanent holding locks  37  of the connector housing  30  and deforms to open. When the rear holder  31  is pushed further forward, the slider pushing portion  43  of the rear holder  31  contacts the rear edge  44  of the slider  16  from the rear. When the rear holder  31  is pushed further forward, the slider  16  is moved forward relative to the terminal body  15  by the slider pushing portion  43 . The holding protrusions  28  of the terminal body  15  are released from the temporary receiving holes  26  of the slider  16  and the sidewalls of the slider  16  run on the holding protrusions  28 . The sidewall of the slider  16  deform to open. 
     When the rear holder  31  is pushed further forward, the sidewalls of the slider  16  recover and the holding protrusions  28  of the terminal body  15  are elastically fitted in the permanent receiving holes  27  of the slider  16 . The slider  16  is held at the second position relative to the terminal body  15 . The permanent holding locks  37  of the connector housing  30  are fitted to the lock receiving portions  38  of the rear holder  31 . The rear holder  31  is held at the permanent holding position relative to the connector housing  30  (see  FIGS. 1 and 2 ). 
     When the slider  16  is at the second position relative to the terminal body  15 , the upper pressing portion  25 A of the slider  16  presses the upper connecting tab  18 A of the terminal body  15  from above to below. The lower pressing portion  25 B of the slider  16  pressed the lower connecting tab  18 B of the terminal body  15  from below to above. Namely, the core wire  13  is sandwiched between the upper connecting tab  18 A and the lower connecting tab  18 B in the top-bottom direction. 
     As illustrated in  FIG. 10 , the burrs  10  protrude from the edges of the contact surfaces  21 A and  21 B of the upper folded portion  23 A and the lower folded portion  23 B toward the electric wire  11 . The burrs  50  dig into the oxide film on the surface of the core wire  13  of the electric wire  11 , that is, the burrs  50  break the oxide film and reach the metal surface of the core wire  13 . Electrical connection is established between the core wire  13  and the connecting tabs  18 A and  18 B. 
     The burrs  50  are formed at the folded portions  23 A and  23 B of the connecting tabs  18 A and  18 B. The portion of the connecting tabs  18 A and  18 B including the folded portions  23 A and  23 B have greater thicknesses and firmly contact the core wire  13 . Because the burrs  50  are located at the folded portions  23 A and  23 B, the burrs  50  deeply dig into the core wire  13  and contribute to reduction in contact resistance. 
     The folded portions  23 A and  23 B are displaced from each other in the inserting direction in which the core wire  13  is inserted. According to the configuration, the core wire  13  is bent and sandwiched between the connecting tabs  18 A and  18 B and thus the strength to hold the electric wire  11  increases. Further, the burrs  50  are pressed against the bent portion of the core wire  13 . Therefore, the burrs  50  further deeply dig into the core wire  13 . This is effective to reduce the contact resistance. 
     Further, with the serrations  22 A and the serrations  22 B are formed in the contact surfaces  21 A of the upper connecting tab  18 A and the contact surface  21 B of the lower connecting tab  18 B, respectively. Therefore, sections of the contact surfaces  21 A and  21 B further deeply dig into the surface of the core wire  13 . This contributes to reduction in contact resistance between the electric wire  11  and the female terminal  12 . 
     Second Example of Assembling of the Connector  10   
     A second example of assembling of the connector  10  according to this embodiment will be described. In this production process, the rear holder  31  is moved forward after the jig  45  is brought into contact with the jig contact section  46  from the rear as illustrated in  FIG. 26  and the slider  16  is slid forward. 
     As illustrated in  FIG. 26 , the slider  16  may be stopped between the first position and the second position during the movement of the slider  16  to the second position. The electrical connection between the core wire  13  and the upper connecting tab  18 A and the lower connecting tab  18 B is not sufficient. This is because the upper connecting tab  18 A and the lower connecting tab  18 B do not sufficiently press the core wire  13 . If the rear holder  31  is moved from the first position to the second position, the rear holder  31  may not be moved to the permanent holding position because the slider pushing portion  43  of the rear holder  31  contacts the rear edge of the slider  16 . Namely, whether the slider  16  is moved to the second position, that is, whether the electrical connection is properly established between the electric wire  11  and the terminal body  15  can be determined. 
     Steps of the assembly other than those described above are similar to those of the first example and thus will not be described. 
     Operation and Effect of this Embodiment 
     Next, operation and effect of this embodiment will be described. The female terminal  12  according to this embodiment includes the terminal body  15  and the slider  16 . The terminal body  15  is formed by processing the metal sheet. The terminal body  15  is coupled to the front end of the electric wire  11  with respect to the extending direction in which the electric wire  11  extends. The terminal body  15  holds the electric wire  11 . The slider  16  is slidable in the extending direction in which the electric wire extends relative to the terminal body  15 . The terminal body  15  includes the upper connecting tab  18 A and the lower connecting tab  18 B, each of which has the cantilever shape. The upper connecting tab  18 A and the lower connecting tab  18 B include the contact surfaces  21 A and  21 B that are contactable the electric wire  11 . The slider  16  include the upper pressing portion  25 A and the lower pressing portion  25 B that press the upper connecting tab  18 A and the lower connecting tab  18 B when the slider  16  is slid. The upper connecting tab  18 A and the lower connecting tab  18 B are deformed to contact the electric wire  11 . The upper connecting tab  18 A and the lower connecting tab  18 B include the burrs  50  that are produced during the processing of the metal sheet. The burrs  50  protrude from the contact surfaces  21 A and  21 B toward the electric wire. 
     The terminal wire assembly  60  including the terminal according to this embodiment includes the female terminal  12  and the electric wire  11  that is coupled to the female terminal  12 . 
     According to the configuration, the upper connecting tab  18 A and the lower connecting tab  18 B press the core wire  13  when the slider  16  is slid in the inserting direction. The core wire  13  is electrically connected to the upper connecting tab  18 A and the lower connecting tab  18 B. Namely, the electric wire  11  is electrically connected to the female terminal  12  without using a relatively large jig such as dies. 
     The upper connecting tab  18 A and the lower connecting tab  18 B include the burrs  50  that are produced at the edges of the upper connecting tab  18 A and the lower connecting tab  18 B during the shearing. As illustrated in  FIG. 10 , the burrs  50  protrude toward the electric wire  11 . The burrs  50  dig into the oxide film on the surface of the core wire  13  and thus the electrical connection is established between the core wire  13  and the connecting tabs  18 A and  18 B. 
     The upper pressing portion  25 A and the lower pressing portion  25 B protrude inward in the slider  16 . The slider  16  includes the narrow portion  16 B and the wide portion  16 A. The narrow portion  16 B of the slider  16  has a less internal dimension measuring in a pressing direction in which the upper pressing portion  25 A and the lower pressing portion  25 B press the upper connecting tab  18 A and the lower connecting tab  18 B (the top-bottom direction). The wide portion  16 A of the slider  16  has an internal dimension measuring in the pressing direction greater than the internal dimension of the narrow portion  16 B. The wide portion  16 A is closer to the front end than the upper pressing portion  25 A and the lower pressing portion  25 B with respect to the inserting direction. 
     According to the configuration, the upper connecting tab  18 A is pressed downward by the upper pressing portion  25 A of the narrow portion  16 B and the lower connecting tab  18 B is pressed upward by the lower pressing portion  25 B of the narrow portion  16 B by sliding the slider  16  to move the narrow portion  16 B to a position corresponding to the upper connecting tab  18 A and the lower connecting tab  18 B. 
     The serrations  22 A and the serrations  22 B are formed in the contact surfaces  21 A and  21 B of the upper connecting tab  18 A and the lower connecting tab  18 B. Therefore, the sections of the contact surfaces  21 A and  21 B further deeply dig into the surface of the core wire  13  and thus the contact resistance between the electric wire  11  and the female terminal  12  can be reduced. 
     In this embodiment, the slider  16  has the tubular shape that extends in the inserting direction. The slider  16  includes the guide portions  47  closer to the rear edge of the slider  16  with respect to the inserting direction. Each guide portion  47  is narrowed toward the front with respect to the inserting direction. The core wire  13  of the electric wire  11  slides on the guide portions  47  and thus the electric wire  11  is guided to the inner side of the slider  16 . 
     According to the configuration, the core wire  13  can be easily inserted into the slider  16  by sliding the core wire  13  on the guide portions  47 . 
     In this embodiment, the slider  16  includes the jig contact section  46  that protrudes outward. With the jig contact section  46  pushed by the jig  45  in the inserting direction from the rear, the slider  16  slides forward in the inserting direction. 
     According to the configuration, the electric wire is electrically connected to the female terminal  12  by pushing the slider  16  forward in the inserting direction with the jig  45  contacting the jig contact section  46 . 
     In this embodiment, the upper folded portion  23 A protrudes from the contact surface  21 A of the upper connecting tab  18 A and the lower folded portion  23 B protrudes from the contact surface  21 B of the lower connecting tab  18 B. The upper folded portion  23 A and the lower folded portion  23 B contact the core wire  13  of the electric wire  11  and hold the core wire  13  bent in the direction that crosses the inserting direction. 
     According to the configuration, the core wire  13  remains bent in the direction that crosses the inserting direction with the upper folded portion  23 A and the lower folded portion  23 B. Even if the electric wire  11  is pulled, the upper folded portion  23 A and the lower folded portion  23 B receive a force to pull the electric wire  11 . According to the configuration, the electric wire  11  is firmly held by the female terminal  12 . 
     The serrations  22 A and  22 B are formed in the contact surfaces  21 A and  21 B, respectively. The serrations  22 A and  22 B dig into the surface of the core wire  13  when the upper connecting tab  18 A and the lower connecting tab  18 B press the core wire  13 . 
     With the serrations  22 A and  22 B digging into the surface of the core wire  13 , the strength of the female terminal  12  to hold the core wire  13  increases. Further, an insulating film formed on the surface of the core wire  13  is ripped by the serrations  22 A and  22 B. Therefore, an electrical resistance between the core wire  13  and the female terminal  12  can be reduced. 
     The serrations  22 A and  22 B include the grooves that extend in the direction that is perpendicular to the inserting direction. The grooves are arranged at intervals in the inserting direction. According to the configuration, the core wire  13  is held at multiple points by the serrations  22 A and  22 B with respect to the inserting direction in which the electric wire  11  is inserted. Therefore, the strength of the female terminal  12  to hold the core wire  13  increases. Further, the core wire  13  is electrically connected to the female terminal  12  at the multiple points by the serrations  22 A and  22 B with respect to the inserting direction. Therefore, the electrical resistance between the core wire  13  and the female terminal  12  can be reduced. 
     In this embodiment, the wire guide recess  48  is formed in the contact surface  21 B to extend in the inserting direction. According to the configuration, the core wire  13  is easily disposed in the contact surface  21 B by placing the core wire  13  in the wire guide recess  48 . 
     The terminal body  15  includes the terminal window through which whether the edge of the core wire  13  is place at a predefined position is detectable when the core wire  13  is disposed between the upper connecting tab  18 A and the lower connecting tab  18 B. According to the configuration, wither the core wire  13  is placed at the predefined position and coupled to the female terminal  12  is easily confirmed by detecting the edge of the core wire  13  through the terminal window  24 . 
     In this embodiment, the terminal body  15  includes the holding protrusions  28  and the slider  16  includes the temporary receiving holes  26  and the permanent receiving holes  27 . With the holding protrusions  28  fitted in the temporary receiving holes  26 , the slider  16  is held at the first position. With the holding protrusions  28  fitted in the permanent receiving holes, the slider  16  is held at the second holding position. 
     The connector  10  according to this embodiment includes the connector housing  30  and the rear holder  31 . The connector housing  30  includes the cavities  29  in which female terminals  12  are held. The rear holder  31  is attached to the rear portion of the connector housing  30 . The rear portion of the rear holder  31  includes insertion holes  39  that communicate with the cavities  29 . 
     According to the configuration, the female terminals  12  is held in the connector housing  30  while removal of the female terminals from the connector housing  30  is restricted by the rear holder  31 . 
     In this embodiment, the slider  16  includes the upper pressing portion  25 A and the lower pressing portion  25 B. The upper pressing portion  25 A contacts the upper connecting tab  18 A on an opposite side from the contact surface  21 A. The lower pressing portion  25 B contacts the lower connecting tab  18 B on an opposite side from the contact surface  21 B. The slider  16  is slidable between the first position and the second position. At the first position, the upper pressing portion  25 A and the lower pressing portion  25 B are separated from the upper connecting tab  18 A and the lower connecting tab  18 B, respectively. At the second position, the upper pressing portion  25 A and the lower pressing portion  25 B contact the upper connecting tab  18 A and the lower connecting tab  18 B, respectively. The rear holder  31  is movable in the inserting direction. The front end of the rear holder  31  with respect to the inserting direction includes the slider pushing portion  43 . The slider pushing portion  43  contacts the slider  16  from the rear with respect to the inserting direction and pushes the slider  16  forward with respect to the inserting direction to move the slider  16  to the contact position when the rear holder  31  is moved from the rear to the front with respect to the inserting direction. 
     According to the configuration, the slider  16  is pushed by the slider pushing portion  43  of the rear holder  31  when the rear holder  31  is moved. Namely, the electric wire is electrically connected to the female terminal  12  concurrently with the movement of the rear holder  31 . 
     In this embodiment, the rear holder  31  is movable in the front-rear direction. The front end of the rear holder  31  includes the slider pushing portion  43 . The slider pushing portion  43  contacts the slider  16  from the rear and pushes the slider  16  forward to move the slider  16  to the permanent holding position when the rear holder  31  is moved from the rear to the front. 
     According to the configuration, the slider  16  is pushed by the slider pushing portion  43  of the rear holder  31  when the rear holder  31  is moved from the rear to the front. Namely, the slider  16  is moved to the second position. The upper pressing portion  25 A and the lower pressing portion  25 B of the slider  16  contact the upper connecting tab  18 A and the lower connecting tab  18 B, respectively. The upper pressing portion  25 A and the lower pressing portion  25 B of the slider press the upper connecting tab  18 A and the lower connecting tab  18 B toward the core wire  13 . The upper connecting tab  18 A and the lower connecting tab  18 B deform and contact the core wire  13 . Therefore, the electric wire  11  is electrically connected to the female terminal  12 . According to the configuration, the electric wire  11  is electrically connected to the female terminal  12  by moving the rear holder  31  from the rear to the front with respect to the inserting direction, that is, by a single step. 
     In this embodiment, the front end of the rear holder  31  with respect to the inserting direction contacts the jig contact section  46  of the slider  16  when the slider  16  does not reach the second position. 
     According to the configuration, a condition in which the slider  16  does not reach the second position, that is, the connection between the core wire  13  and the female terminal  12  is not complete is detectable based on the contact of the front end of the rear holder  31  with the jig contact section  46  of the slider  16 . 
     In this embodiment, the terminal body  15  includes the terminal window  24 . When the core wire  13  is between the upper connecting tab  18 A and the lower connecting tab  18 B, the end of the core wire  13  is visible from outside through the terminal window  24 . 
     According to the configuration, the end of the core wire  13  in the female terminal  12  is visible through the terminal window  24  and thus whether the core wire  13  is at the predefined position relative to the upper connecting tab  18 A and the lower connecting tab  18 B is easily inspected. 
     In this embodiment, the connector housing  30  includes the connector windows  33  through which the terminal windows  24  of the female terminals  12  are visible from outside. 
     According to the configuration, the end of the core wire  13  in the female terminal  12  is visible through the connector window  33  and thus whether the core wire  13  is at the predefined position relative to the connecting tab  18  is easily inspected. 
     Other Embodiments 
     The technology described herein is not limited to the embodiment described above and illustrated in the drawings. The following embodiments may be included in the technical scope of the technology described herein. 
     (1) In the above embodiment, the upper connecting tab  18 A and the lower connecting tab  18 B are included in each terminal body  15 . However, each terminal body  15  may include a single connecting tab or three or more connecting tabs. 
     (2) In the above embodiment, the terminal is the female terminal  12 . However, the terminal may be a male terminal or a ring terminal the includes a round plate-shaped connecting portion with a bolt insertion hole. 
     (3) In the above embodiment, the terminal body  15  includes the terminal window  24  and the connector housing  30  includes the connector windows  33 . However, the terminal window  24  and the connector windows  33  may be omitted. 
     (4) In the above embodiment, the rear holder  31  includes the guide portions  47  at the edges of the insertion holes  39 . However, the guide portions  47  may be omitted. 
     (5) In the above embodiment, the rear holder  31  includes the slider pushing portion  43  to push the slider  16 . However, the slider pushing portion  43  may be omitted. 
     (6) In the above embodiment, the cavities  29  are in the double-tier arrangement. However, the cavities  29  may be in a single-tier arrangement or triple-or-more-tier arrangement. 
     (7) In the above embodiment, the slider  16  is made of metal. However, the slider  16  may be made of any material such as synthetic resin and ceramic. 
     (8) In the above embodiment, the upper connecting tab  18 A and the lower connecting tab  18 B are elastically deformable. However, the upper connecting tab  18 A and the lower connecting tab  18 B may be plastically deformable. 
     (9) In the above embodiment, the electric wire  11  ins a covered electric wire that includes the core wire  13  covered with the insulating sheath  14 . However, the electric wire  11  may be a bare electric wire. 
     (10) In the above embodiment, the slider  16  has a rectangular tubular shape. However, the slider  16  may have a round tubular shape or a polygonal shape such as a triangular tubular shape, a pentagonal tubular shape, and a hexagonal tubular shape. The shape is not limited to a tubular shape. 
     (11) In the above embodiment, the slider  16  include the temporary receiving holes  26 . However, the temporary receiving holes  26  may be omitted. 
     EXPLANATION OF SYMBOLS 
       10 : Connector 
       11 : Electric wire 
       12 : Female terminal (an example of a terminal) 
       14 : Insulating sheath 
       15 : Terminal body 
       16 : Slider 
       16 A: Wide portion 
       16 B: Narrow portion 
       17 : Tubular connecting portion 
       18 : Connecting tab 
       18 A: Upper connecting tab (an example of a connecting tab) 
       18 B: Lower connecting tab (an example of a connecting tab) 
       19 : Elastic connecting tab 
       20 : Base portion 
       21 A: Contact surface 
       21 B: Contact surface 
       22 A: Serration 
       22 B: Serration 
       23 A: Upper folded portion (an example of a folded portion) 
       23 B: Lower folded portion (an example of a folded portion) 
       24 : Terminal window 
       25 A: Upper pressing portion (an example of a pressing portion) 
       25 B: Lower pressing portion (an example of a pressing portion) 
       26 : Temporary receiving hole 
       26 A: First position holding mechanism 
       26 B: Second position holding mechanism 
       27 : Permanent receiving hole 
       28 : Holding protrusion 
       29 : Cavity 
       30 : Connector housing 
       31 : Rear holder 
       33 : Connector window 
       34 : Diving wall 
       35 : Partition wall 
       36 : Temporary holding lock 
       37 : Permanent holding lock 
       38 : Lock receiving portion 
       39 : Insertion hole 
       41 : Hood portion 
       42 A,  42 B: Projection wall 
       43 : Slider pushing portion 
       44 : Rear edge 
       45 : Jig 
       46 : Jig contact section 
       47 : Guide portion 
       48 : Wire guide recess 
       50 : Burr 
       60 : Terminal wire assembly