Patent Publication Number: US-11646519-B2

Title: Electric connector for flat conductor

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority from Japanese Patent Application No. 2020-186072 filed with the Japan Patent Office on Nov. 6, 2020, the entire content of which is hereby incorporated by reference. 
     BACKGROUND 
     1. Technical Field 
     The present invention relates to a flat conductor electric connector mounted on a circuit board and connected to a flat conductor. 
     2. Related Art 
     A flat conductor extending in a front-back direction parallel with a surface of a circuit board is connected to a flat conductor electric connector as described above in a state in which the flat conductor electric connector is mounted on the circuit board. This connector is configured such that mounting portions of multiple terminals held on a housing are mounted on the circuit board by soldering in a state in which the mounting portions are arrayed on the circuit board. Normally, many terminals are arrayed, and for this reason, mounting portions thereof are required to be densely positioned for reduction in the size of the connector in a terminal array direction. 
     For example, a connector of JP-UM-A-61-194263 has been known as the flat conductor electric connector configured such that the mounting portions of the terminals are densely arrayed. In JP-UM-A-61-194263, the connector is manufactured in such a manner that a semi-processed product of terminals (“contacts” in JP-UM-A-61-194263) extending in a comb tooth shape is formed from a carrier (a coupling piece) obtained by punching of a metal plate and the carrier is cut and removed from the terminals after each terminal of the semi-processed product has been held on a housing. 
     For such a connector, when an attempt is made to densely array the terminals, there are problems such as a problem that with only the single semi-processed product, a sufficient clearance for a punching blade cannot be ensured between the terminals. In Patent Literature 1, two semi-processed products are used, and the terminals are densely arrayed in such a manner that both semi-processed products are, at carriers thereof, fixed to each other with the semi-processed products being shifted from each other by a half pitch of the terminal and the carriers are cut after these semi-processed products have been held on the housing. 
     SUMMARY 
     A flat conductor electric connector mounted on a circuit board and electrically connected to a front end side portion of a band-shaped flat conductor extending in a front-back direction, comprising: 
     multiple terminals in such a shape that metal plate members are bent in a plate thickness direction thereof; and 
     a housing holding, by insert molding, the multiple terminals arrayed in a terminal array direction which is a band width direction, 
     wherein each of the multiple terminals has, at least at one end portion in the front-back direction, a holding target portion held on the housing and an extending portion extending from the housing and formed with a mounting portion to be mounted on the circuit board by soldering, and the holding target portions adjacent to each other are arrayed and positioned in the terminal array direction with areas overlapping with each other in the front-back direction and the extending portions adjacent to each other are arrayed and positioned in the terminal array direction with areas overlapping with each other in the front-back direction, 
     the extending portion includes one extending portion or multiple extending portions separated from each other in the terminal array direction and has, at least at an end portion positioned outside the housing in the front-back direction and positioned on a housing side, a narrow portion of which a terminal width in the terminal array direction is narrower than a terminal width of the holding target portion, and an opening is formed by the narrow portion, and 
     a clearance between a narrow portion of an optional extending portion and another extending portion adjacent to the narrow portion of the optional extending portion with respect to an opening is greater than a clearance between adjacent ones of the holding target portions. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIGS.  1 A and  1 B  show perspective views of a flat conductor electric connector according to an embodiment of the present invention together with a flat conductor,  FIG.  1 A  showing a state before insertion of the flat conductor and  FIG.  1 B  showing a state after insertion of the flat conductor. 
         FIGS.  2 A and  2 B  show perspective views of the flat conductor electric connector of  FIGS.  1 A and  1 B  in a state in which a movable member is at an open position,  FIG.  2 A  showing a state as viewed from a back side and  FIG.  2 B  showing a state as viewed from a front side. 
         FIG.  3    shows a perspective view of each member of the flat conductor electric connector of  FIGS.  1 A and  1 B  in a separated state. 
         FIG.  4 A  shows a perspective view of a terminal in a state in which a first arm member and a second arm member overlap with each other,  FIG.  4 B  shows a perspective view of the first and second arm members separated from each other, and  FIG.  4 C  shows a perspective view of a metal fitting. 
         FIG.  5 A  shows a longitudinal sectional view of the flat conductor electric connector at the position of a slit of the first arm member in a terminal array direction,  FIG.  5 B  shows a partially-enlarged view of  FIG.  5 A , and  FIG.  5 C  shows a plan view of a mounting portion of the terminal of the flat conductor electric connector of  FIG.  5 A . 
         FIGS.  6 A and  6 B  show longitudinal sectional views of the flat conductor electric connector after insertion of the flat conductor,  FIG.  6 A  showing a section at the position of a locking portion of the movable member in the terminal array direction and  FIG.  6 B  showing a section at the position of a first contact arm portion of the first arm member in the terminal array direction. 
         FIGS.  7 A,  7 B and  7 C  show longitudinal sectional views of the steps of attaching the movable member upon manufacturing of the flat conductor electric connector,  FIG.  7 A  showing a state immediately before attachment,  FIG.  7 B  showing a state in the middle of attachment, and  FIG.  7 C  showing a state after completion of attachment. 
         FIG.  8 A  shows a longitudinal sectional view at the position of a slit of a first arm member in a terminal array direction of a flat conductor electric connector according to a variation, and  FIG.  8 B  shows a partially-enlarged view. 
         FIG.  9 A  shows a plan view of a mounting portion of a terminal in another variation, and  FIG.  9 B  shows a bottom view of a mounting portion of a terminal in still another variation. 
         FIG.  10    shows a perspective view of the connector in still another variation without a movable member. 
     
    
    
     DETAILED DESCRIPTION 
     In the following detailed description, for purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing. 
     In recent years, in a connector configured such that terminals are densely arrayed, the terminals are held on a housing by insert molding in many cases. Generally, for such a connector, a small clearance between the terminals needs to be reliably ensured with favorable accuracy so that the housing can be molded and the terminals can be densely positioned. A member (a die pin) such as a pin of a molding die is arranged between the terminals. However, when an attempt is made to hold the terminals by insert molding in the connector of Patent Literature 1, the clearance between the terminals is extremely small, and for this reason, the die pin cannot be arranged or the strength thereof cannot be obtained because the die pin is extremely thin. Nevertheless, when the clearance between the terminals is increased, the original purpose that the terminals are densely arrayed cannot be achieved. 
     The present invention has been made in view of such a situation, and an object of the present invention is to provide a flat conductor electric connector capable of ensuring the strength of a die pin of a molding die for holding terminals by insert molding while the terminals are densely arrayed. 
     The flat conductor electric connector according to the present invention is a flat conductor electric connector mounted on a circuit board and electrically connected to a front end side portion of a band-shaped flat conductor extending in a front-back direction, the flat conductor electric connector including multiple terminals in such a shape that metal plate members are bent in a plate thickness direction thereof and a housing holding, by insert molding, the multiple terminals arrayed in a terminal array direction which is a band width direction. 
     In such a flat conductor electric connector, in the present invention, each of the multiple terminals has, at least at one end portion in the front-back direction, a holding target portion held on the housing and an extending portion extending from the housing and formed with a mounting portion to be mounted on the circuit board by soldering, and the holding target portions adjacent to each other are arrayed and positioned in the terminal array direction with areas overlapping with each other in the front-back direction and the extending portions adjacent to each other are arrayed and positioned in the terminal array direction with areas overlapping with each other in the front-back direction. The extending portion includes one extending portion or multiple extending portions separated from each other in the terminal array direction and has, at least at an end portion positioned outside the housing in the front-back direction and positioned on a housing side, a narrow portion of which the terminal width in the terminal array direction is narrower than the terminal width of the holding target portion, and an opening is formed by the narrow portion. A clearance between a narrow portion of an optional extending portion and another extending portion adjacent to the narrow portion of the optional extending portion with respect to an opening is greater than a clearance between adjacent ones of the holding target portions. 
     In the present invention, the opening is formed by the narrow portion of the extending portion of the terminal so that a die pin of a molding die can enter the opening. Thus, even when the terminals are arrayed with a narrow clearance therebetween in the terminal array direction, it is not necessary to thinly form the die pin, and the die pin with a sufficient strength can be arranged upon insert molding of the terminals and the housing. 
     In the present invention, the opening of each terminal may be formed as a recessed portion at a side edge of the extending portion. 
     In the present invention, each terminal may have a first terminal member and a second terminal member sandwiching the flat conductor in a thickness direction thereof, a first extending portion of the first terminal member and a second extending portion of the second terminal member may form the extending portion, and the narrow portion may be formed at least at one of the first extending portion or the second extending portion. 
     In the present invention, in a case where the terminal has the first terminal member and the second terminal member, openings may be, at a side edge of the first extending portion and a side edge of the second extending portion, formed by recessed portions facing each other in the terminal array direction. With this configuration, the opposing recessed portions of the first and second extending portions together form a single large opening space so that a thick die pin can enter such a space. 
     Advantageous Effects of Invention 
     According to the present invention, the opening is formed by the narrow portion of the extending portion of the terminal so that the die pin of the molding die can enter such an opening. Thus, the die pin with a sufficient strength can be used without the need for narrowing the entire area of the terminal and increasing a terminal array pitch, and the terminals can be densely arrayed while the terminals are held at proper positions. 
     Hereinafter, an embodiment of the present invention will be described based on the attached drawings. 
       FIGS.  1 A and  1 B  are perspective views showing an electric connector  1  (hereinafter referred to as a “connector  1 ”) according to the present embodiment together with a flat conductor C as a partner connection body,  FIG.  1 A  showing a state before insertion of the flat conductor C and  FIG.  1 B  showing a state after insertion of the flat conductor C. 
     The connector  1  is a flat conductor electric connector arranged on a mounting surface of a circuit board (not shown) and connected to the flat conductor C such that the above-described circuit board and the flat conductor C are brought into electric conduction with each other. The flat conductor C is in a band shape extending in a front-back direction (an X-axis direction) as shown in  FIGS.  1 A and  1 B , and a front end side portion of the flat conductor C is connected to the connector  1 . In the present embodiment, an X1 direction is the front, and an X2 direction is the back. In the flat conductor C, multiple circuit portions (not shown) extending in the front-back direction in an insulating layer of the flat conductor C are arrayed in a band width direction (a Y-axis direction) of the flat conductor C, and reach a front end (tip end) position of the flat conductor C. Front end side portions of these circuit portions are exposed at one surface, i.e., a lower surface, of the flat conductor C, and are contactable with later-described terminals  20  of the connector  1 . Cutout portions C 1  are formed at both side edges of the above-described front end side portion, and a back end edge of an ear portion C 2  positioned at the front of the cutout portion C 1  functions as a locking target portion C 2 A to be locked at a locking portion  54  of a movable member  50  of the connector  1  as described later (see  FIG.  6 A ). Moreover, a reinforcing plate C 3  is bonded to the other surface, i.e., an upper surface, of the front end side portion of the flat conductor C. 
     The connector  1  includes a housing  10  extending in a longitudinal direction as a connector width direction (the Y-axis direction) parallel with the mounting surface of the circuit board (not shown) and perpendicular to the front-back direction and made of an electric insulating material, the multiple metal terminals  20  held on the housing  10  in a terminal array direction as the connector width direction, the movable member  50  supported on the housing  10  to move (turn) between a closed position and an open position as described later and made of an electric insulating material, and metal fittings  60  held at both end portions of the housing  10  in the terminal array direction. The front end side portion of the flat conductor C is, from the back side (the X2 side), inserted into and connected to the connector  1  (see an arrow of  FIG.  1 A ). Moreover, in the present embodiment, the terminal  20  is used as a power supply terminal. As described later, the terminal  20  has a first arm member  30  as a first arm portion and a second arm member  40  as a second arm portion, the first arm member  30  and the second arm member  40  being separate metal plate members. 
     As shown in  FIGS.  1 A to  3   , the housing  10  has side walls  11  positioned on both end sides in the terminal array direction (the Y-axis direction) and extending in the front-back direction (the X-axis direction), a front wall  12  (see  FIG.  3   ) extending in the terminal array direction to couple front end portions of the two side walls  11 , and a back wall  13  extending in the terminal array direction to couple back end portions of the two side walls  11 . A space surrounded by the two side walls  11  and the front wall  12  and opening backward forms a receiving portion  14  which can receive the front end side portion of the flat conductor C from the back. 
     The side wall  11  has a guide portion  11 A extending, at a position close to a back end of the side wall  11 , inward from an upper portion of the side wall  11  in the terminal array direction. The guide portion  11 A is provided at a position with a clearance from the back wall  13  in an upper-lower direction (a Z-axis direction). The dimension of such a clearance in the upper-lower direction is slightly greater than the thickness dimension (the dimension in the upper-lower direction) of the flat conductor C, and entrance of side edge portions (both end side portions in the Y-axis direction) of the flat conductor C into the receiving portion  14  from the back is allowed by the above-described clearance. An upper guide surface  11 A- 1  inclined downward toward the front is formed at a lower surface of a back end portion of the guide portion  11 A, and guides the side edge portion of the flat conductor C into the receiving portion  14 . 
     Moreover, a side guide surface  11 B is formed at the back end portion of the side wall  11 . The side guide surface  11 B forms an inclined surface inclined inward in the connector width direction toward the front, and guides the side edge portion of the flat conductor C into the receiving portion  14 . 
     Further, a side groove portion  11 C penetrating the side wall  11  in the upper-lower direction at an intermediate position in the terminal array direction and opening backward is formed at a back half portion of the side wall  11 . The side groove portion  11 C is, corresponding to a later-described restriction arm portion  63  of the metal fitting  60 , positioned below a later-described horizontal arm portion  63 B of the restriction arm portion  63  in the terminal array direction (see  FIG.  2 B ). Moreover, back protruding portions  11 D protruding upward on both sides of the side groove portion  11 C are formed at the back end portion of the side wall  11 . A front surface of each back protruding portion  11 D forms a curved surface recessed in an arc shape, and such a curved surface is formed as a support surface  11 D- 1  turnably supporting a later-described turning shaft portion  53  of the movable member  50  (see  FIGS.  7 A to  7 C ). 
     The front wall  12  has the function of a front holding portion holding, by insert molding (integral molding), later-described first front holding target portions  32  of the first arm members  30  of the terminals  20  and later-described second holding target portions  42  of the second arm members  40  of the terminals  20 . At the front wall  12 , support protruding portions  12 A protruding backward from a back surface of an upper portion of the front wall  12  are formed at positions corresponding to the terminals  20  in the terminal array direction. As described later, the support protruding portion  12 A supports a later-described coupling portion  43  of the second arm member  40  in contact with a front surface of the coupling portion  43  (see  FIGS.  5 A and  6 B ). 
     Moreover, as shown in  FIGS.  5 A to  5 C , a lower protruding portion  12 B protruding downward from a lower surface of a front end portion of the front wall  12  and extending forward is, at the front wall  12 , formed at a position corresponding to a position between a later-described first forward-extending portion  33  and a later-described second extending portion  44  of each terminal  20 . The lower protruding portion  12 B is formed with the same dimensions as those of the first forward-extending portion  33  and the second extending portion  44  in the upper-lower direction. A lower surface of the lower protruding portion  12 B is positioned at the same height as that of a lower surface of each of the first forward-extending portion  33  and the second extending portion  44 , and is surface-contactable with the mounting surface of the circuit board (not shown). The lower protruding portion  12 B has a front end protruding portion  12 B- 1  protruding forward beyond a front surface of the front wall  12 . 
     As shown in  FIGS.  5 A to  5 C , the front end protruding portion  12 B- 1  extends to an intermediate position in the front-back direction in a later-described pin insertable space  20 A formed between a first recessed portion  33 A- 2  of a first front mounting portion  33 A as described later and a second recessed portion  44 A- 2  of a second mounting portion  44 A as described later. Moreover, an upper surface of the front end protruding portion  12 B- 1  forms an inclined surface inclined downward toward the front. 
     The back wall  13  has the function of a back holding portion holding, by insert molding, later-described first back holding target portions  34  of the first arm members  30 . As shown in  FIG.  5 A , a lower guide surface  13 A inclined upward toward the front is formed at an upper surface of a back end portion of the back wall  13 , and guides the front end portion of the flat conductor C into the receiving portion  14 . 
     The terminal  20  has the first arm member  30  as the first arm portion and the second arm member  40  as the second arm portion, the first arm member  30  and the second arm member  40  being the separate members. Since the terminal is formed of two members as described above, it is not necessary to perform bending for folding back a metal plate member upon manufacturing of the terminal, and therefore, the terminal is easily manufactured and a material yield is improved.  FIG.  4 A  is a perspective view showing the terminal  20  in a state in which the first arm member  30  and the second arm member  40  overlap with each other, and  FIG.  4 B  is a perspective view showing the first and second arm members  30 ,  40  separated from each other. The first arm member  30  and the second arm member  40  are formed in such a manner that band-shaped metal plate members extending in the front-back direction are bent in a plate thickness direction. 
     The first arm member  30  has a first contact arm portion  31  linearly extending across an area between the front wall  12  and the back wall  13  in the front-back direction, the first front holding target portion  32  extending in a substantially lying L-shape from a front end of the first contact arm portion  31  and held on the front wall  12 , the first forward-extending portion  33  extending forward from a lower end of the first front holding target portion  32 , the first back holding target portion  34  extending in a substantially lying L-shape from a back end of the first contact arm portion  31  and held on the back wall  13 , and a first backward-extending portion  35  extending backward from a back end of the first back holding target portion  34 . As shown in  FIGS.  4 A and  4 B , the first arm member  30  is configured such that a later-described first front vertical portion  32 B of the first front holding target portion  32  and the first forward-extending portion  33  are, with a terminal width (a dimension in the terminal array direction) of the substantially half of the terminal width of other portions of the first arm member  30 , formed on a Y2 side at the first arm member  30 . 
     As shown in  FIG.  3   , the first contact arm portion  31  extends across an area between a back end surface of the front wall  12  and a front end surface of the back wall  13  in the front-back direction in a posture in which the upper-lower direction is the plate thickness direction, and is exposed through the housing  10 . A window-shaped slit  31 A penetrating the first contact arm portion  31  in the upper-lower direction and extending in the front-back direction is formed at the first contact arm portion  31 , and contact stripe portions  31 B extending in the front-back direction and formed elastically displaceable in the upper-lower direction are formed at positions on both sides of the slit  31 A in the terminal array direction. 
     In the present embodiment, the slit  31 A is, as shown in  FIG.  4 B , in a substantially diamond shape of which the longitudinal direction is the front-back direction. Thus, the contact stripe portion  31 B positioned on each side of the slit  31 A has the minimum terminal width at an intermediate position (a position at which the width dimension of the slit  31 A in the terminal array direction is maximum) in the front-back direction, and has the maximum terminal width at a front end position and a back end position. A portion of the contact stripe portion  31 B with the minimum terminal width is formed as a first contact portion  31 B- 1  contactable with a lower surface of the front end side portion of the flat conductor C with contact pressure. In the present embodiment, the circuit portions are exposed at the lower surface of the front end side portion of the flat conductor C, and the first contact portions  31 B- 1  function as contact portions configured to contact and be electrically connected to the above-described circuit portions. 
     In the present embodiment, since the slit  31 A is formed at the first contact arm portion  31 , the two first contact portions  31 B- 1  are provided at the single first contact arm portion  31  so that the reliability of contact with the flat conductor C can be improved. Moreover, since each contact stripe portion  31 B is thinner than the entirety of the first contact arm portion  31  and is easily elastically displaceable, the flat conductor C is easily inserted into a portion among the first contact portions  31 B- 1  and a later-described second contact portion  41 A. Further, as described above, since the contact stripe portion  31 B has the minimum terminal width at the position of the first contact portion  31 B- 1 , the contact stripe portion  31 B is easily elastically displaceable in the upper-lower direction at the position of the first contact portion  31 B- 1  upon contact with the above-described circuit portion. Moreover, since the contact stripe portion  31 B has the maximum terminal width at the front end position and the back end position, the strength of the contact stripe portion  31 B can be ensured at these positions. 
     The first front holding target portion  32  is formed bent in the plate thickness direction to form the substantially lying L-shape as viewed in the terminal array direction, and is held on the front wall  12  by insert molding. The first front holding target portion  32  has a first front horizontal portion  32 A as a first base portion extending forward from the front end of the first contact arm portion  31  and the first front vertical portion  32 B bent at a front end of a Y2-side portion of the first front horizontal portion  32 A and extending downward. 
     In the present embodiment, as shown in  FIG.  4 B , the first front horizontal portion  32 A is formed with the same terminal width as that of the first contact arm portion  31 , but the first front vertical portion  32 B is formed with a terminal width of the substantially half of the terminal width of the first contact arm portion  31  at a position close to the Y2 side in the terminal array direction. The first front horizontal portion  32 A and the first front vertical portion  32 B are embedded in the front wall  12 . 
     At a position below a lower surface of the front wall  12  (excluding the lower protruding portions  12 B), the first forward-extending portion  33  is bent at a lower end of the first front vertical portion  32 B, and extends forward. The first forward-extending portion  33  is positioned within the area of the front wall  12  in the front-back direction, extends along the lower surface of the front wall  12 , and further extends forward beyond the front surface of the front wall  12 . The first forward-extending portion  33  is positioned in the area of the first front horizontal portion  32 A as the first base portion in the terminal array direction. Of the first forward-extending portion  33 , a portion positioned at the front of the front wall  12  is formed as the first front mounting portion  33 A mounted on the mounting surface of the circuit board by soldering. When the connector  1  is arranged on the mounting surface of the circuit board, the first front mounting portion  33 A surface-contacts the corresponding circuit portion (not shown) of the circuit board at a lower surface of the first front mounting portion  33 A, and is connectable to the corresponding circuit portion by soldering. 
     As shown in  FIG.  5 C , the first front mounting portion  33 A is formed with a first narrow portion  33 A- 1  at a back end portion, i.e., an end portion positioned on a front wall  12  side. A side edge of the first narrow portion  33 A- 1  extending in the front-back direction on a Y1 side is positioned recessed to the Y2 side with respect to a Y1-side edge of other portions of the first forward-extending portion  33 . With this configuration, the first narrow portion  33 A- 1  has a smaller terminal width than that of the other portions of the first forward-extending portion  33 . At the first front mounting portion  33 A, the first recessed portion  33 A- 2  as an opening is formed on the Y1 side of the above-described back end portion by the first narrow portion  33 A- 1 . That is, the first recessed portion  33 A- 2  is in such a shape that the Y1-side edge of the back end portion of the first front mounting portion  33 A as described above is cut out in a rectangular shape, and opens to the Y1 side. As shown in  FIG.  5 C , a back end of the first narrow portion  33 A- 1 , i.e., a back end of the first recessed portion  33 A- 2 , is at the same position as that of the front surface of the front wall  12  in the front-back direction. 
     As shown in  FIGS.  4 A and  4 B , the first back holding target portion  34  extends with the same terminal width as that of the first contact arm portion  31  from the back end of the first contact arm portion  31 . As shown in  FIG.  5 A , the first back holding target portion  34  is formed bent in the plate thickness direction to form the substantially lying L-shape as viewed in the terminal array direction, and is held on the back wall  13  by insert molding. The first back holding target portion  34  has a first back horizontal portion  34 A extending backward from the back end of the first contact arm portion  31  and a first back vertical portion  34 B bent at a back end of the first back horizontal portion  34 A and extending downward. In the present embodiment, as shown in  FIG.  5 A , the first back horizontal portion  34 A and the first back vertical portion  34 B are positioned inside the back wall  13 , and are embedded in the back wall  13 . 
     The first backward-extending portion  35  is bent at a lower end of the first back vertical portion  34 B, and extends backward. The first backward-extending portion  35  is positioned within the area of the back wall  13  in the front-back direction, extends along a lower surface of the back wall  13 , and further extends backward beyond a back surface of the back wall  13 . Of the first backward-extending portion  35 , a portion positioned at the back of the back wall  13  is formed as a first back mounting portion  35 A mounted on the mounting surface of the circuit board by soldering. When the connector  1  is arranged on the mounting surface of the circuit board, the first back mounting portion  35 A surface-contacts the corresponding circuit portion (not shown) of the circuit board at a lower surface of the first back mounting portion  35 A, and is connectable to the corresponding circuit portion by soldering. 
     The second arm member  40  has a second contact arm portion  41  extending in the front-back direction, the second holding target portion  42  positioned at the front of the second contact arm portion  41  and held on the front wall  12 , the coupling portion  43  extending in the upper-lower direction to couple a front end of the second contact arm portion  41  and a back end of the second holding target portion  42  to each other, and the second extending portion  44  extending forward from a lower end of the second holding target portion  42 . As shown in  FIGS.  4 A and  4 B , the second arm member  40  is configured such that a later-described second vertical portion  42 B of the second holding target portion  42  and the second extending portion  44  are, with a terminal width (a dimension in the terminal array direction) of the substantially half of the terminal width of other portions of the second arm member  40 , formed on the Y1 side at the second arm member  40 . 
     The second contact arm portion  41  extends, above the first contact arm portion  31  of the first arm member  30 , backward from a back end position of the front wall  12  at a position apart from the first contact arm portion  31 . The second contact arm portion  41  has the same terminal width as that of the first contact arm portion  31 , and is at the same position as that of the first contact arm portion  31  in the terminal array direction. As shown in  FIGS.  5 A and  6 B , a back end (a free end) of the second contact arm portion  41  is positioned among the first contact portions  31 B- 1  of the first contact arm portion  31  and the back end of the first contact arm portion  31  in the front-back direction. At the second contact arm portion  41 , the second contact portion  41 A protruding downward at the same position as that of the first contact portion  31 B- 1  in the front-back direction is formed by bending of the second contact arm portion  41  in the plate thickness direction. The dimension of a clearance formed by the first contact portion  31 B- 1  and the second contact portion  41 A in the upper-lower direction is smaller than the thickness dimension of the flat conductor C. Moreover, a portion of the second contact arm portion  41  from the second contact portion  41 A to a back end is formed as a back end inclined portion  41 B inclined upward toward the back. 
     As shown in  FIG.  4 B , the second holding target portion  42  is formed bent in the plate thickness direction to form a substantially lying L-shape as viewed in the terminal array direction, and is held on the front wall  12  by insert molding. The second holding target portion  42  has a second horizontal portion  42 A as a second base portion extending forward from a lower end of the coupling portion  43  and the second vertical portion  42 B bent at a front end of a Y1-side portion of the second horizontal portion  42 A and extending downward. 
     In the present embodiment, as shown in  FIG.  4 B , the second horizontal portion  42 A is formed with the same terminal width as that of the second contact arm portion  41 , but the second vertical portion  42 B is, with a terminal width of the substantially half of the terminal width of the second contact arm portion  41 , formed at a position close to the Y1 side in the terminal array direction. The second horizontal portion  42 A and the second vertical portion  42 B are embedded in the back wall  13 . 
     The second horizontal portion  42 A has the same terminal width as that of the first front horizontal portion  32 A of the first arm member  30 , and is at the same position as that of the first front horizontal portion  32 A in the terminal array direction. Moreover, a portion from the second horizontal portion  42 A to the back end of the second contact arm portion  41  has the same terminal width as that of a portion from the first front horizontal portion  32 A to the back end of the first contact arm portion  31 , and is at the same position as that of such a portion in the terminal array direction. With this configuration, the multiple terminals  20  can be densely arrayed, and as a result, reduction in the size of the connector  1  in the terminal array direction is achieved. The phrase “densely arrayed” as described herein means that the first arm member  30  and the second arm member  40  are arrayed close to each other such that a clearance (indicated by “P 2 ” in  FIG.  5 C ) between portions (dashed portions in  FIG.  5 C ) of the first forward-extending portion  33  and the second extending portion  44  positioned at the back of the front surface of the front wall  12  of the housing  10  is as small as possible. 
     The second vertical portion  42 B has the same terminal width as that of the first front vertical portion  32 B of the first arm member  30 , is at the same position as that of the first front vertical portion  32 B in the front-back direction and the upper-lower direction, and is positioned differently from the first front vertical portion  32 B and is adjacent to the first front vertical portion  32 B in the terminal array direction. 
     As shown in  FIG.  5 A , the second horizontal portion  42 A surface-contacts, at a lower surface thereof, an upper surface of the first front horizontal portion  32 A of the first arm member  30 , and can be in electric conduction with the first front horizontal portion  32 A. As described above, in the present embodiment, the first front horizontal portion  32 A and the second horizontal portion  42 A are held on the front wall  12  in a state in which the first front horizontal portion  32 A and the second horizontal portion  42 A overlap with and surface-contact each other in the upper-lower direction, and therefore, the dimension of the connector  1  in the upper-lower direction can be reduced and reduction in the size in the upper-lower direction, i.e., reduction in the height, can be achieved. 
     Moreover, in the present embodiment, as shown in  FIG.  5 A , the second horizontal portion  42 A is, at an upper surface thereof, supported on the front wall  12 . Thus, when the flat conductor C enters the portion among the first contact portions  31 B- 1  and the second contact portion  41 A and the second contact arm portion  41  is elastically displaced upward, the second horizontal portion  42 A can resist force acting on the second horizontal portion  42 A in an elastic displacement direction, i.e., the upward force of separating the second horizontal portion  42 A from the first front horizontal portion  32 A, and separation of the first front horizontal portion  32 A and the second horizontal portion  42 A can be prevented. Thus, a sufficiently-great contact pressure on the flat conductor C for sandwiching the flat conductor C by the first contact portions  31 B- 1  and the second contact portion  41 A can be more reliably ensured. 
     As shown in  FIGS.  5 A and  6 B , the coupling portion  43  has the same terminal width as those of the second contact arm portion  41  and the second horizontal portion  42 A, is bent upward at a back end of the second horizontal portion  42 A, and is coupled to the front end of the second contact arm portion  41 . The coupling portion  43  extends along a back surface of the support protruding portion  12 A of the front wall  12 , i.e., a protruding top surface of the support protruding portion  12 A, at a position at the back of the front wall  12 . The front surface of the coupling portion  43  is supported on the back surface of the support protruding portion  12 A. 
     The front surface of the coupling portion  43  is supported on the back surface of the support protruding portion  12 A as described above. Thus, when the flat conductor C enters the portion among the first contact portions  31 B- 1  and the second contact portion  41 A and the second contact arm portion  41  is elastically displaced upward, the coupling portion  43  can resist force acting on the coupling portion  43  and having a forward component, and as a result, separation of the first front horizontal portion  32 A and the second horizontal portion  42 A can be prevented. Thus, a sufficiently-great contact pressure on the flat conductor C for sandwiching the flat conductor C by the first contact portions  31 B- 1  and the second contact portion  41 A can be more reliably ensured. 
     At a position below the lower surface of the front wall  12  (excluding the lower protruding portions  12 B), the second extending portion  44  is bent at a lower end of the second vertical portion  42 B, and extends forward. The second extending portion  44  is positioned within the area of the front wall  12  in the front-back direction, extends along the lower surface of the front wall  12 , and further extends forward beyond the front surface of the front wall  12 . The second extending portion  44  is positioned in the area of the second horizontal portion  42 A as the second base portion in the terminal array direction. Moreover, the second extending portion  44  has the same terminal width as that of the first forward-extending portion  33  of the first arm member  30 , is at the same position as that of the first forward-extending portion  33  in the front-back direction and the upper-lower direction, and is positioned differently from the first forward-extending portion  33  and is adjacent to the first forward-extending portion  33  in the terminal array direction. 
     Of the second extending portion  44 , a portion positioned at the front of the front wall  12  is formed as the second mounting portion  44 A mounted on the mounting surface of the circuit board by soldering. When the connector  1  is arranged on the mounting surface of the circuit board, the second mounting portion  44 A surface-contacts, at a lower surface thereof, the same corresponding circuit portion (not shown) as the corresponding circuit portion on which the first front mounting portion  33 A of the first arm member  30  is mounted, and is connectable to the corresponding circuit portion by soldering. 
     As shown in  FIG.  5 C , the second mounting portion  44 A is formed with a second narrow portion  44 A- 1  at a back end portion, i.e., an end portion positioned on the front wall  12  side. A side edge of the second narrow portion  44 A- 1  extending in the front-back direction on the Y2 side is positioned recessed to the Y1 side with respect to a Y2-side edge of other portions of the second extending portion  44 . With this configuration, the second narrow portion  44 A- 1  has a smaller terminal width than that of the other portions of the second extending portion  44 . At the second mounting portion  44 A, the second recessed portion  44 A- 2  as an opening is formed on the Y2 side of the above-described back end portion by the second narrow portion  44 A- 1 . That is, the second recessed portion  44 A- 2  is in such a shape that the Y2-side edge of the back end portion of the second mounting portion  44 A as described above is cut out in a rectangular shape, and opens to the Y2 side. 
     In the present embodiment, a space between the first narrow portion  33 A- 1  and the second narrow portion  44 A- 1  in the terminal array direction, i.e., a space formed between the first recessed portion  33 A- 2  and the second recessed portion  44 A- 2 , is formed as the pin insertable space  20 A allowing insertion of a die pin (not shown), which is provided at a molding die, in the upper-lower direction when the terminal  20  is held on the housing  10  by insert molding. 
     Of one terminal  20 , the dimension of a clearance between the first narrow portion  33 A- 1  and the second narrow portion  44 A- 1  in the terminal array direction, i.e., the dimension (indicated by “P 1 ” in  FIG.  5 C ) of the pin insertable space  20 A, is greater than a clearance between portions of the first front vertical portion  32 B and the second vertical portion  42 B positioned immediately at the back of the front wall  12  and greater than a clearance between the first forward-extending portion  33  (excluding the first narrow portion  33 A- 1 ) and the second extending portion  44  (excluding the second narrow portion  44 A- 1 ) in the terminal array direction.  FIG.  5 C  shows a state in which the dimension P 1  of the pin insertable space  20 A in the terminal array direction is greater than the clearance P 2  between the portions (the dashed portions in  FIG.  5 C ) of the first forward-extending portion  33  and the second extending portion  44  positioned at the back of the front surface of the front wall  12  of the housing  10 . 
     The movable member  50  is provided above the housing  10  and the terminals  20 , and is turnable about the axis of the later-described turning shaft portion  53  between the closed position at which the movable member  50  is in a posture parallel with the circuit board (not shown) as shown in  FIGS.  1 A and  1 B  and the open position at which the movable member  50  is in a posture standing in the upper-lower direction as shown in  FIGS.  2 A and  2 B . When the movable member  50  is at the closed position, detachment of the flat conductor C is inhibited. When the movable member  50  is at the open position, detachment of the flat conductor C is allowed. 
     As shown in  FIG.  3    showing the same posture as that at the open position, the movable member  50  has a plate-shaped body portion  51  extending in a longitudinal direction which is the terminal array direction (the Y-axis direction), end plate portions  52  provided at both end positions of the body portion  51  in the terminal array direction, the turning shaft portions  53  provided on a lower end side of the end plate portions  52 , and the locking portions  54  (see  FIG.  2 B ) protruding forward (the X1 direction) from the end plate portions  52 . 
     The movable member  50  is positioned across the substantially same area as that of the housing  10  in the terminal array direction. In the front-back direction, the movable member  50  is positioned to cover the substantially entire area of the receiving portion  14  when the movable member  50  is at the closed position (see  FIGS.  1 A,  1 B, and  5 A ), and is positioned on a back end side of the housing  10  when the movable member  50  is at the open position (see  FIGS.  2 A and  2 B ). 
     As shown in  FIG.  2 B , groove-shaped body groove portions  51 A extending in the upper-lower direction at positions corresponding to the terminals  20  in the terminal array direction are formed at a front surface (a surface on the X1 side) of the body portion  51  when the movable member  50  is at the open position. Since the body groove portions  51 A are formed at the body portion  51  as described above, contact of the body portion  51  with the second contact arm portions  41  of the second arm members  40  of the terminals  20  when the body portion  51  is at the closed position can be avoided. 
     As shown in  FIG.  2 B , at the end plate portion  52 , a slit-shaped end groove portion  52 A extending downward from a position close to an upper end and penetrating the end plate portion  52  in the front-back direction is formed at a position corresponding to the side groove portion  11 C of the housing  10  and the later-described restriction arm portion  63  of the metal fitting  60  in the terminal array direction. When the movable member  50  is at the closed position, the end groove portion  52 A is positioned within the area of the side groove portion  11 C of the housing  10  in the front-back direction, and houses a later-described bent arm portion  63 B- 2  of the metal fitting  60  (see  FIG.  7 C ). Moreover, as shown in  FIGS.  2 B and  3   , at the end plate portion  52 , a lower end of the end plate portion  52  is recessed with respect to a lower end of the body portion  51  at a position corresponding to the guide portion  11 A of the housing  10  in the front-back direction and the terminal array direction, thereby forming an end recessed portion  52 B. As shown in  FIGS.  1 A,  1 B, and  2 B , the end recessed portion  52 B houses the guide portion  11 A, and accordingly, contact among the movable member  50  and the guide portions  11 A is avoided. 
     As shown in  FIG.  3   , the turning shaft portion  53  is provided coupled to the lower end of the end plate portion  52  at a position outside the end recessed portion  52 B in the terminal array direction, and extends across an area including the end groove portion  52 A. As shown in  FIGS.  7 A to  7 C , the turning shaft portion  53  is configured such that the sectional shape thereof along a plane perpendicular to the terminal array direction is a substantially rectangular shape and a surface thereof in an area from a back surface to a lower surface when the movable member  50  is at the closed position forms a single continuous raised curved surface. This raised curved surface is curved with the substantially same curvature as that of the support surface  11 D- 1  of the housing  10 , and forms a support target surface  53 A turnably supported by the support surface  11 D- 1  in the course of turning the movable member  50 . 
     As shown in  FIG.  2 B , the locking portion  54  is, in a state in which the end plate portion  52  is at the open position, positioned above the end recessed portion  52 B and slightly inward from the end recessed portion  52 B in the terminal array direction, and protrudes from the front surface (a lower surface at the closed position) of the end plate portion  52  (also see  FIG.  6 A ). The locking portions  54  are, in the terminal array direction, positioned corresponding to both outer sides of an area where the terminals  20  are arrayed, specifically the side edge portions of the flat conductor C. As shown in  FIG.  6 A , a lower surface of the locking portion  54  when the movable member  50  is at the closed position is formed as an inclined surface  54 A inclined downward toward the front, and a front surface of the locking portion  54  is formed as a locking surface  54 B forming a flat surface perpendicular to the front-back direction. As shown in  FIG.  6 A , when the movable member  50  is brought into the closed position after insertion of the flat conductor C, the locking portions  54  enter the cutout portions C 1  of the flat conductor C from above. As a result, the locking portions  54  are positioned such that the locking surfaces  54 B thereof are lockable to the locking target portions C 2 A at the back thereof, and detachment of the flat conductor C is inhibited accordingly. 
     As shown in  FIGS.  3  and  4 C , the metal fitting  60  is formed in such a manner that a metal plate member is bent in a plate thickness direction. The two metal fittings  60  provided at the connector  1 , i.e., the metal fitting  60  positioned on the Y1 side and the metal fitting  60  positioned on the Y2 side, have shapes symmetrical to each other in the terminal array direction. Hereinafter, the metal fitting  60  on the Y2 side will be described, and description of the metal fitting  60  on the Y1 side will be omitted. As shown in  FIGS.  3  and  4 C , the metal fitting  60  has a fixing portion  61  extending to face the mounting surface of the circuit board (not shown), a reinforcing portion  62  held on the housing  10  by insert molding, and the restriction arm portion  63  supporting the turning shaft portion  53  of the movable member  50  and restricting upward and forward movement of the turning shaft portion  53 . 
     The fixing portion  61  is formed in such a flat plate shape that a plate surface (a surface perpendicular to the plate thickness direction) thereof is parallel with the mounting surface of the circuit board (not shown), and is in a substantially L-shape as viewed from above. The fixing portion  61  has a back fixing portion  61 A extending in the terminal array direction and a front fixing portion  61 B extending forward from the back fixing portion  61 A at an inner position in the terminal array direction. As shown in  FIGS.  1 A and  1 B , the back fixing portion  61 A is positioned at the back of the side wall  11  of the housing  10 . The front fixing portion  61 B extends forward along a lower surface of the side wall  11  at a position inside the side groove portion  11 C in the terminal array direction. The fixing portion  61  surface-contacts, at a lower surface thereof, a corresponding portion of the mounting surface of the circuit board, and is connected and fixed to such a mounting surface by soldering. 
     The reinforcing portion  62  has a vertical plate portion  62 A bent at an inner edge in the terminal array direction at a front end portion of the front fixing portion  61 B and extending upward and a horizontal plate portion  62 B bent at an upper edge of the vertical plate portion  62 A and extending inward in the terminal array direction. The reinforcing portion  62  is positioned within the area of the guide portion  11 A of the side wall  11  in the front-back direction. The vertical plate portion  62 A is embedded in an inner portion of the side wall  11  with respect to the side groove portion  11 C, thereby reinforcing such an inner portion. The horizontal plate portion  62 B is embedded in the guide portion  11 A to reinforce the guide portion  11 A. 
     The restriction arm portion  63  has a vertical arm portion  63 A bent at a front edge of the back fixing portion  61 A at a position outside the back fixing portion  61 A in the terminal array direction and extending upward and the horizontal arm portion  63 B bent at an upper edge of the vertical arm portion  63 A and extending forward. The restriction arm portion  63  is positioned corresponding to the side groove portion  11 C of the housing  10  and the turning shaft portion  53  of the movable member  50  in the terminal array direction. The vertical arm portion  63 A is positioned at the back of the side groove portion  11 C. The horizontal arm portion  63 B extends forward at immediately above the side groove portion  11 C, and as shown in  FIG.  2 A , is positioned to penetrate the end groove portion  52 A of the movable member  50  at the open position. 
     As shown in  FIGS.  4 A to  4 C  and  FIG.  7 C , the horizontal arm portion  63 B is bent downward at an intermediate position in the front-back direction, and is further bent diagonally forward-upward. As a result, a substantially back half portion of the horizontal arm portion  63 B forms a linear arm portion  63 B- 1  linearly extending in the front-back direction, and a substantially front half portion of the horizontal arm portion  63 B forms the substantially V-shaped bent arm portion  63 B- 2  as viewed in the terminal array direction. As shown in  FIG.  7 C , the linear arm portion  63 B- 1  is configured such that a front end side portion thereof is formed as an upper restriction portion  63 B- 1 A configured to contact the turning shaft portion  53  from above to restrict excessive upward movement of the turning shaft portion  53 . Moreover, the bent arm portion  63 B- 2  is configured such that a portion thereof extending in the upper-lower direction is formed as a front restriction portion  63 B- 2 A positioned contactable with the turning shaft portion  53  from the front to restrict excessive forward movement of the turning shaft portion  53 . The upper restriction portion  63 B- 1 A and the front restriction portion  63 B- 2 A can constantly restrict excessive upward and forward movement of the turning shaft portion  53  even when the movable member  50  is at any turning position, and therefore, unexpected detachment of the movable member  50  from the housing  10  can be favorably prevented. 
     The connector  1  according to the present embodiment is manufactured in the following manner. First, the second horizontal portions  42 A of the second arm members  40  are arranged in the molding die (not shown) in a state in which each second horizontal portion  42 A overlaps with a corresponding one of the first front horizontal portions  32 A of the first arm members  30  from above, and the metal fittings  60  are also arranged in the molding die. The molding die can be divided into multiple parts, and the die pins for molding the housing in a state in which the positions of the first arm members  30  and the second arm members  40  are set are provided to extend in the upper-lower direction at least at one of an upper die arranged from above and a lower die arranged from below. The die pin is inserted in the upper-lower direction into the pin insertable space  20 A (see  FIG.  5 C ) formed between the first narrow portion  33 A- 1  and the second narrow portion  44 A- 1 . At this point, the pin is inserted and positioned at a front half portion in the pin insertable space  20 A. 
     In the present embodiment, the die pin of the molding die can enter the above-described pin insertable space  20 A, and therefore, even if the first arm member  30  and the second arm member  40  are arrayed adjacent to each other in the terminal array direction with a narrow clearance therebetween, it is not necessary to thinly form the die pin and the die pin with a sufficient strength can be arranged upon insert molding of the terminals  20  and the housing  10 . Thus, the terminals can be densely arrayed at proper positions without the need for narrowing the entire area of the terminal and increasing a terminal array pitch. 
     Next, molten resin is injected into the molding die, and thereafter, is solidified. In this manner, the housing  10  is formed. As a result, the first arm members  30 , the second arm members  40 , and the metal fittings  60  are held on the housing  10  by insert molding (integral molding). 
     Next, the movable member  50  is attached to the housing  10  from the front. The steps of attaching the movable member  50  will be described based on  FIGS.  7 A to  7 C . First, as shown in  FIG.  7 A , the movable member  50  in the posture at the closed position is arranged on the housing  10  at a position at the front of the metal fittings  60 . Next, the movable member  50  is moved backward while the posture thereof at the closed position is maintained. At this point, the turning shaft portions  53  contact, from the front, front end side portions of the bent arm portions  63 B- 2  of the metal fittings  60 , i.e., portions inclined diagonally forward-upward, and accordingly, the bent arm portions  63 B- 2  and therefore the horizontal arm portions  63 B are elastically displaced upward. As a result, further backward movement of the movable member  50  is allowed. 
     Upon attachment of the movable member  50 , the fixing portions  61  of the metal fittings  60  are not fixed to the mounting surface of the circuit board. Thus, the metal fittings  60  are elastically displaceable, taking, as an arm length, the entire length of a portion along an area from a front end portion of the restriction arm portion  63  to the front end portion of the front fixing portion  61 B. That is, in the course of attaching the movable member  50 , the horizontal arm portions  63 B, the vertical arm portions  63 A, and the fixing portions  61  are elastically displaced as shown in  FIG.  7 B . In the present embodiment, the horizontal arm portions  63 B are easily displaced upward because a great arm length can be ensured as described above. As a result, the movable member  50  is easily attached. 
     When the turning shaft portions  53  of the movable members  50  reach a position at the back of the bent arm portions  63 B- 2 , the elastic displacement amounts of the horizontal arm portions  63 B, the vertical arm portions  63 A, and the fixing portions  61  decrease. As a result, the horizontal arm portions  63 B move downward, and as shown in  FIG.  7 C , the upper restriction portions  63 B- 1 A of the linear arm portions  63 B- 1  contact the turning shaft portions  53  from above, and the front restriction portions  63 B- 2 A of the bent arm portions  63 B- 2  are positioned contactable with the turning shaft portions  53  from the front. In this manner, the movable member  50  is attached to the housing  10 , and the connector  1  is completed. 
     Next, motion for connecting the connector  1  and the flat conductor C to each other will be described based on  FIGS.  1 A to  2 B  and  FIGS.  6 A, and  6 B . First, the first front mounting portions  33 A and the first back mounting portions  35 A of the first arm members  30  of the terminals  20  and the second mounting portions  44 A of the second arm members  40  of the terminals  20  are each connected to the corresponding circuit portions of the circuit board by soldering, and the fixing portions  61  of the metal fittings  60  are connected and fixed to the corresponding portions of the circuit board by soldering. 
     The metal fittings  60  are fixed to the circuit board by soldering, and accordingly, elastically-displaceable portions of the metal fittings  60  are only the restriction arm portions  63 . Thus, as compared to the time of attachment of the movable member  50  in manufacturing of the connector  1 , the arm length of the metal fitting  60  for elastic displacement is shortened, and the restriction arm portion  63  is less likely to be elastically displaced. As a result, detachment of the movable member  50  from the housing  10  after the connector  1  has been mounted on the circuit board can be more reliably prevented. 
     Next, as shown in  FIGS.  1 A and  1 B , in a state in which the movable member  50  is at the closed position, the flat conductor C is positioned at the back of the connector  1  to extend in the front-back direction along the mounting surface of the circuit board (not shown). 
     Next, the flat conductor C is inserted forward into the receiving portion  14  of the connector  1 . At this point, the flat conductor C is guided into the receiving portion  14  by the upper guide surfaces  11 A- 1 , the side guide surfaces  11 B, and the lower guide surface  13 A of the housing  10 . In the course of insertion into the connector  1 , when the front end of the flat conductor C contacts the inclined surfaces  54 A of the locking portions  54  of the movable member  50 , forward force (component force) and upward force (component force) act on the inclined surfaces  54 A. As a result, the locking portions  54  and therefore the movable member  50  are, by the upward force, lifted by the thickness dimension of the flat conductor C, and further entrance of the flat conductor C is allowed. At this point, the upper restriction portions  63 B- 1 A of the metal fittings  60  receive the upward force from the turning shaft portions  53  of the movable member  50 , and the horizontal arm portions  63 B are elastically displaced upward. Accordingly, upward movement of the movable member  50  is allowed. 
     Immediately after the front end of the flat conductor C has started lifting the locking portions  54 , the front end of the flat conductor C contacts plate surfaces (inclined surfaces) of the back end inclined portions  41 B of the second contact arm portions  41  of the second arm members  40 , and the second contact arm portions  41  are elastically displaced upward. Then, the flat conductor C enters a portion among the second contact portions  41 A and the first contact portions  31 B- 1  of the first arm members  30  (see  FIG.  6 B ). 
     When the front end of the flat conductor C contacts a back surface of the front wall  12 , the ear portions C 2  of the flat conductor C pass by the position of the locking portion  54  of the movable member  50 , and the cutout portions C 1  reach the position of the locking portion  54 . As a result, as shown in  FIG.  6 A , the movable member  50  returns to the closed position, the locking portions  54  enter the cutout portions C 1  from above, and the locking surfaces  54 B of the locking portions  54  are positioned lockable to the locking target portions C 2 A of the flat conductor C from the back. The locking portions  54  are lockable to the locking target portions C 2 A as described above, and therefore, unexpected backward detachment of the flat conductor C is prevented. 
     Moreover, when the front end of the flat conductor C contacts the back surface of the front wall  12  and insertion of the flat conductor C is completed, the state in which the second contact arm portions  41  are elastically displaced is maintained and the second contact portions  41 A press the flat conductor C from above, as shown in  FIG.  6 B . That is, the flat conductor C is sandwiched in the upper-lower direction by the first contact portions  31 B- 1  and the second contact portions  41 A. As a result of the flat conductor C receiving pressing force from above from the second contact portions  41 A, the circuit portions exposed at the lower surface of the flat conductor C are pressed against the first contact portions  31 B- 1  from above, contact the first contact portions  31 B- 1  with contact pressure, and are brought into electric conduction with the first contact portions  31 B- 1 . At this point, as shown in  FIG.  6 B , the first contact portions  31 B- 1  receive force from above from the circuit portions, and the contact stripe portions  31 B are slightly elastically displaced downward. 
     In the present embodiment, the flat conductor C enters the portion among the first contact portions  31 B- 1  and the second contact portions  41 A and the second contact arm portions  41  are elastically displaced upward, and accordingly, the force in the elastic displacement direction, i.e., the upward force of separating the second horizontal portions  42 A from the first front horizontal portions  32 A, acts on the second horizontal portions  42 A of the second arm members  40 . However, as shown in  FIG.  6 B , the second horizontal portions  42 A of the second arm members  40  are, at the upper surfaces thereof, supported on the front wall  12 , and therefore, the second horizontal portions  42 A can resist the upward force acting thereon and separation of the first front horizontal portions  32 A and the second horizontal portions  42 A can be prevented. 
     Moreover, in the present embodiment, the second contact arm portions  41  of the second arm members  40  are elastically displaced upward, and accordingly, the force having the forward component acts on the coupling portions  43 . As shown in  FIG.  6 B , the front surfaces of the coupling portions  43  of the second arm members  40  are supported on the back surfaces of the support protruding portions  12 A of the front wall  12 . Thus, the coupling portions  43  can resist the above-described force acting thereon. This can also prevent separation of the first front horizontal portions  32 A and the second horizontal portions  42 A. 
     As described above, in the present embodiment, separation of the first front horizontal portions  32 A and the second horizontal portions  42 A is favorably prevented, and therefore, a sufficiently-great contact pressure on the flat conductor C for sandwiching the flat conductor C by the first contact portions  31 B- 1  and the second contact portions  41 A can be more reliably ensured. 
     When the flat conductor C is detached from the connector  1 , the movable member  50  is turned and brought into the open position. As a result, the locking portions  54  of the movable member  50  are taken out of the cutout portions C 1  of the flat conductor C, and a locked state among the locking portions  54  and the locking target portions C 2 A of the flat conductor C is canceled. Thus, the flat conductor C can be pulled backward and be detached from the connector  1  with no difficulty. 
     The embodiment of the present invention is not limited to the already-described embodiment, and various modifications can be made. In the already-described embodiment, the first forward-extending portion  33  and the first backward-extending portion  35  of the first arm member  30  and the second extending portion  44  of the second arm member  40  are positioned below the lower surface of the housing  10 . However, as shown in  FIGS.  8 A and  8 B , these portions may be provided at the same height position as that of the lower surface of the housing  10  in the upper-lower direction. 
       FIGS.  8 A and  8 B  indicate portions of a housing, a first arm member, a second arm member, and a movable member corresponding to those in the already-described embodiment by such reference numerals that “100” is added to the reference numerals in the already-described embodiment. In this variation, a first forward-extending portion (not shown) and a first backward-extending portion  135  of a first arm member  130  and a second extending portion  144  of a second arm member  140  are, at lower surfaces thereof, positioned at the same height as that of a lower surface of a housing  110  in the upper-lower direction. Moreover, no portion equivalent to the lower protruding portion  12 B (see  FIGS.  5 A and  5 B ) in the already-described embodiment is formed at a front wall  112  of the housing  110 . As shown in  FIGS.  8 A and  8 B , a front end protruding portion  112 B- 1  equivalent to the front end protruding portion  12 B- 1  in the already-described embodiment is formed to protrude from a front surface of a lower portion of the front wall  112 . The front end protruding portion  112 B- 1  is a portion corresponding to the front end protruding portion  12 B- 1  in the already-described embodiment, and is formed at a back half portion in a pin insertable space  120 A formed between a first recessed portion (not shown) of a first front mounting portion and a second recessed portion  144 A- 2  of a second mounting portion  144 A. 
     Moreover, in the already-described embodiment, the pin insertable space  20 A is formed by the first recessed portion  33 A- 2  and the second recessed portion  44 A- 2  as the openings, and the first recessed portion  33 A- 2  and the second recessed portion  44 A- 2  are formed such that the opposing side edge portions (the edge portions extending in the front-back direction) of the first front mounting portion  33 A and the second mounting portion  44 A are cut out in the same shape and are symmetrical to each other in the terminal array direction (see  FIGS.  4 A and  5 C ). However, the positions, shapes, and sizes of the openings are not limited to above. 
     For example, as in a variation shown in  FIG.  9 A , an opening may be formed between a first recessed portion  233 A- 2  and a second recessed portion  244 A- 2  having different shapes.  FIG.  9 A  indicates portions of a housing, a first arm member, and a second arm member corresponding to those in the already-described embodiment by such reference numerals that “200” is added to the reference numerals in the already-described embodiment. Description of portions with the same shapes as those of the already-described embodiment will be omitted. This variation is similar to the already-described embodiment on the point that the first recessed portion  233 A- 2  of a first front mounting portion  233 A and the second recessed portion  244 A- 2  of a second mounting portion  244 A are, at opposing side edge portions thereof, cut out at the same position in the front-back direction, but is different from the already-described embodiment on the point that the second recessed portion  244 A- 2  is greatly cut out in the terminal array direction as compared to the first recessed portion  233 A- 2  and the first recessed portion  233 A- 2  and the second recessed portion  244 A- 2  are asymmetric to each other. 
     Moreover, as in a variation shown in  FIG.  9 B , a pin insertable space  320 A may be formed in such a manner that a narrow portion is formed only at one of a first front mounting portion  333 A or a second mounting portion  344 A.  FIG.  9 B  indicates portions of a housing, a first arm member, and a second arm member corresponding to those in the already-described embodiment by such reference numerals that “300” is added to the reference numerals in the already-described embodiment. Description of portions with the same shapes as those of the already-described embodiment will be omitted. In this variation, a Y1-side edge of the first front mounting portion  333 A of a first forward-extending portion  333  is positioned on the Y2 side with respect to a Y1-side edge of a portion other than the first front mounting portion  333 A, and accordingly, a first front narrow portion  333 A- 1  is formed. On the other hand, no narrow portion is formed at the second mounting portion  344 A. 
     Moreover, in the variation of  FIG.  9 B , the first front mounting portion  333 A has a narrow terminal width across the entire area in the front-back direction, and the entirety of the first front mounting portion  333 A forms a narrow portion. Thus, the pin insertable space  320 A formed between the first front mounting portion  333 A and the second mounting portion  344 A is formed across the entire areas of the first front mounting portion  333 A and the second mounting portion  344 A in the front-back direction. 
     In the already-described embodiment, only one type of terminal, i.e., only the terminals  20  as the power supply terminals, is provided at the connector. However, as a variation, other types of terminals different from the above-described terminals in shape may be provided at the connector in addition to the above-described terminals. On this point, as shown in  FIG.  10   , the other types of terminals may be provided as, e.g., signal terminals.  FIG.  10    is a perspective view showing the connector of such a variation without a movable member. In the variation shown in  FIG.  10   , it is configured such that at the connector  1  in the already-described embodiment, multiple signal terminals are provided on both outer sides of the area where the terminals  20  are arrayed.  FIG.  10    indicates portions corresponding to those in the already-described embodiment by such reference numerals that “400” is added to the reference numerals in the already-described embodiment. Description of portions with the same shapes as those of the already-described embodiment will be omitted. 
     A signal terminal  470  in this variation is formed in such a manner that a flat metal plate member is punched out in a plate thickness direction. The signal terminal  470  is held on a front wall  412  of a housing  410  by insert molding in a posture in which the plate thickness direction of the signal terminal  470  is coincident with the terminal array direction. The signal terminal  470  sandwiches the flat conductor by two elastically-displaceable contact arm portions  471  extending backward from the front wall  412 , and is electrically connected to the flat conductor. The form for holding the signal terminal  470  as described herein is not limited to holding by insert molding, and may be holding by press-fitting, for example. In the case of holding by press-fitting, the signal terminal  470  is press-fitted in a terminal holding groove formed at the front wall  412  of the housing  410 . 
     In the already-described embodiment, all of the terminals  20  are used as the power supply terminals. Instead, in the case of providing multiple terminals of the same type with the same shape, some of the terminals and the other terminals may be different from each other in intended use. For example, some of the multiple terminals may be used as power supply terminals, and the other terminals may be used as signal terminals. 
     Moreover, in the already-described embodiment, the circuit portions of the flat conductor are exposed at the lower surface of the front end side portion of the flat conductor, and contact the first contact portions of the first arm members. Instead, the circuit portions may be exposed at an upper surface of the front end side portion of the flat conductor, and the second contact portions of the second arm members may contact and be electrically connected to the circuit portions. Alternatively, circuit portions forming two layers in the upper-lower direction may be formed at the flat conductor and may be exposed at both of the upper and lower surfaces of the front end side portion of the flat conductor, and the first contact portions of the first arm members may contact the circuit portion at the lower surface and the second contact portions of the second arm members may contact the circuit portion at the upper surface. 
     In the present embodiment, the terminal includes the two members, i.e., the first arm member and the second arm member. Instead, the terminal may include a single member. In this case, the extending portion of the terminal positioned to protrude from the housing in the front-back direction is not divided, but is formed as a single extending portion. On this point, at least at one of adjacent extending portions of adjacent terminals, a narrow portion is, as in the already-described embodiment, formed at least at an end portion positioned on a housing side and positioned outside the housing in the front-back direction, and an opening is formed by such a narrow portion. In this configuration, a clearance between a narrow portion of an optional extending portion and another extending portion adjacent to such a narrow portion with respect to the opening is greater than a clearance between holding target portions of adjacent terminals. 
     The foregoing detailed description has been presented for the purposes of illustration and description. Many modifications and variations are possible in light of the above teaching. It is not intended to be exhaustive or to limit the subject matter described herein to the precise form disclosed. Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims appended hereto.