Abstract:
A terminal is for displacing an insulator of an insulated wire. A housing includes an end which defines a groove for accommodation of the terminal. The end defines an insertion part for insertion of a jig for pressing the insulated wire to the terminal.

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to an insulation displacement connector in which the insulation displacing terminal is accommodated and disposed, the terminal for an end of a wire to be pressed and fitted for connection. 
     Conventionally, this kind of an insulation displacement connector includes respective insulation displacing terminals which are accommodated in respective terminal accommodating grooves formed for arrangement in a row in a housing. In the terminals, insulation wires are pressed and fitted for connection by a pressing jig. 
     SUMMARY OF THE INVENTION 
     An end of the housing of the above-described connector, however, has a thickness dimension in a transverse direction different from that of a partition between the adjacent grooves. Specially, the thickness dimension of the end of the housing can not be shortened as well as the partition between the adjacent grooves, in relation to strength or mounting structure of the housing. Thus, in order to press and fit insulation wires in the terminal accommodated in the groove positioned at the end of the housing in a transverse direction, the pressing jig can not be used, and another jig with a guide member formed of a different structure is necessary. Therefore, a plurality of pressing jigs are employed for the identical housing, and an assembly operation of the insulated wire is complicated, so that a mounting operation can not be smoothly performed. 
     An object of the present inventions to provide an insulation displacement connector which makes a wire mounting operation smoothly performed by one kind of pressing jig. 
     To achieve the object, a first aspect of the invention provides an insulation displacement connector as the following. A terminal is for displacing an insulator of an insulated wire. A housing includes an end which defines a groove for accommodation of the terminal. The end defines an insertion part for insertion of a jig for pressing the insulated wire to the terminal. 
     Preferably, the terminal includes a side plate; and a blade extending inward from the side plate to cut out the insulator. 
     Preferably, the housing includes a partition defining the groove with the end. The partition has a thickness substantially identical to the end. 
     Preferably, the insertion part is recessed. 
     A second aspect of the invention provides an assembly structure of an insulation displacement connector as the following. A terminal is for displacing an insulator of the insulated wire. A housing includes an end which defines a groove accommodating the terminal and defines an insertion part. A jig includes a pressing member pressing the insulated wire to the terminal; and a guide member for guide of the pressing member inserted in the insertion part. 
     According to the aspects, when pressing and fitting the insulated wire to the terminal accommodated in the groove positioned at an end of the housing, by inserting the guide member in the insertion part, the wire is pressed for fitting as an insulated wire is pressed for fitting in an insulation displacing terminal accommodated in a groove positioned at an intermediate part in a transverse direction of the housing. 
     Thus, by using the identical jig, respective insulated wires can be pressed for fitting in and connected to respective insulation displacing terminals accommodated in grooves of the housing. As a result, the jig employed for pressing the insulated wire for fitting is one kind, and an operation for pressing and fitting the wire is remarkably facilitated. The insertion part is opened at the housing, and the connector lightens. 
     The insulated wire is pressed to the blade provided to the side plate to cut out the insulator, and the wire and the terminal are electrically connected each other. 
     When pressing the insulated wire for fitting, though a pair of side plates are subjected to a pressing and widening action, the guide member holds partitions which a groove for accommodation of the terminal is interposed between or a partition and the end of the insertion part, and the side plates is prevented from being pressed and widened. 
     The guide member is inserted in the insertion part under a condition as identical as inserted in another groove, and pressing and fitting operation of the insulated wire is facilitated. 
    
    
     BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS 
     FIG. 1 is an exploded perspective view of an assembly step showing an embodiment of an insulation displacement connector according to the present invention; 
     FIG. 2 is a perspective view of the insulation displacement connector of the embodiment; 
     FIG. 3 is a perspective view showing a step of mounting insulated wires to the insulation displacement connector of the embodiment; and 
     FIG. 4 is a sectional view showing a step of mounting the insulated wires to the insulation displacement connector of the embodiment. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Details of an insulation displacement connector according to the present invention will be described below based on an embodiment shown in the drawings. 
     A structure of a connector housing  11  will be first described by using FIG.  1 . In the housing  11 , terminal accommodating grooves  15  for accommodating respective insulation displacing terminals  12  are formed in parallel and respective adjacent grooves  15  are separated from each other by partitions  16 . In a bottom part of each the groove  15 , an opening part for connection (not shown) for enabling a tab  17  for connection that will be described later to be inserted into a part to be connected of the terminal  12  is formed. In upper faces of opposite side parts in a transverse direction of the housing  11 , jig insertion recessed parts  18  are formed respectively. Side walls  19  for respectively separating the recessed parts  18  and the grooves  15  adjacent to the recessed parts  18  have the identical thickness as the partitions  16  for separating the respective adjacent grooves  15 . 
     Next, a structure of the terminal  12  will be described. As shown in FIG. 1, a multiple continuous body of a plurality of terminals  12  is employed in the present embodiment. In other words, as shown in FIG. 1, longitudinal one side end parts of the plurality of terminals  12  are formed integrally with the other side edge of a carrier  20  at predetermined intervals. 
     Side plates  21  on opposite sides in a transverse direction of the terminal  12  are bent to face each other and the terminal  12  has a tab  17  bent to be folded back diagonally upward from a lower part of longitudinal the other side end of the terminal  12  and extending toward the one side end side of the terminal  12 . The part to be connected (not shown) is formed under the tab  17 . A tab  17  of another terminal  12  disposed and placed under the terminal  12  can be inserted into and connected to the part to be connected. The side plates  21  facing each other are formed with a pair of or a plurality of pairs of insulation displacing blades  21 A extending inward between the side plates  21  and for cutting out resin insulation  13 B with which a periphery of a core  13 A of an insulated wire  13  is covered. 
     The multiple continuous body of the terminals  12  shown in FIG. 1 is in a state in which the continuous body has been subjected to a press step such that spaces between respective adjacent terminals  12  are reduced to be predetermined lengths. In other words, as shown in FIG. 1, presswork is applied to fold the carrier  20  such that the gaps are reduced and that the continuous body can be accommodated in the connector housing  11 . 
     Then, as shown in FIG. 2, the multiple continuous body of the terminals  12  is provisionally accommodated in the housing  11  (an assembly step). In this step, only the carrier  20  of the multiple continuous body of the terminals  12  is not accommodated in the housing  11 . 
     In this state, the carrier  20  is then cut in a predetermined position according to a design of an electric circuit. The tabs  17  of predetermined terminals  12  are raised. At this time, only predetermined tabs  17  of the tabs  17  are raised so as to form a predetermined electric circuit by a relationship between a connector  10  that is formed of the terminals  12  accommodated in the housing  11  and another connector placed on or under the connector  10 . 
     In order to cut the carrier  20 , jigs (not shown) are placed such that a part of the carrier  20  in a predetermined position is interposed between the jigs and a cutting jig (not shown) is moved down from above. As a result, the carriers  20  are electrically separated from each other when a cut piece of the carrier  20  is removed. 
     Then, as shown in FIG. 3, the entire terminals  12  including the carrier  20  are accommodated in the housing  11 . At this time, the carrier  20  that has not been cut is accommodated to cross over the partitions  16  of the housing  11 . Then, as shown in FIG. 3, wires  13  are respectively pressingly fitted in and mounted to the respective terminals  12 . 
     Next, a method of pressingly fitting the wire  13  into the terminal  12  will be described in accordance with FIGS. 3 and 4. A jig  14  is formed of a press-fitting member  14 A and guide members  14 B formed on opposite sides of the press-fitting member  14 A. Lower end parts of the guide members  14 B have such shapes as to be bought in contact with upper faces and side faces of the partitions  16  on opposite sides of the groove  15  in which the predetermined terminal  12  is accommodated or of the partitions  16  and the side walls  19  as shown in FIG.  4 . The press-fitting member  14 A can get out and in the guide members  14 B on the opposite sides. A lower end part of the guide member  14 B is formed such that a distal end of the guide member  14 B positioned on one end part side in a transverse direction of the connector housing  11  is inserted in the insertion recessed part  18  as shown in FIG.  4 . As described above, the side walls  19  for respectively separating the insertion recessed parts  18  and the grooves  15  adjacent to the recessed parts  18  have the identical thickness as the partitions  16  for separating the respective adjacent grooves  15 . Therefore, the distal end of the guide member  14 B can be inserted in the insertion recessed part  18  on the one end part side in the transverse direction of the housing  11  on the identical condition as the distal end is inserted into the groove  15 . 
     By using such a jig  14 , the wires  13  can be successively pressingly fitted in the terminals  12  accommodated in the respective grooves  15 . Because the insertion recessed parts  18  are formed on opposite side parts of the housing  11 , the wires  13  can be pressingly fitted into and connected to the terminals  12  accommodated in all the grooves  15  by using the jig  14 . 
     Thus, the terminals  12  are accommodated in the housing  11  and the connector  10  in which the wires  13  are connected to the terminals  12  is completed. Then, by stacking the connectors  10  vertically with the predetermined tabs  17  raised, the raised tab  17  of the lower connector  10  is inserted in an opening part for connection (not shown) formed on a lower face of the upper connector  10  and is connected to the part to be connected of each the terminal  12 . 
     Although the embodiment has been described above, the present invention is not limited to the embodiment and various modifications accompanying summary of the structure may be made. For example, although the terminal  12  having the raised tab  17  is employed in the above embodiment, it is of course possible to apply the invention to an insulation displacement connector for which insulation displacing terminals with other structures are employed.