Patent Publication Number: US-2022224044-A1

Title: Connector

Description:
TECHNICAL FIELD 
     The technology disclosed herein relates to a connector. 
     BACKGROUND ART 
     A connector cover that is mounted on a connector to cover wires has been known. The connector includes electrodes to which the wires are connected. The connector cover disclosed in Japanese Unexamined Patent Application Publication No. 2003-331946 includes a pair of connector covers having a same shape. The pair of connector covers is fitted to the connector while sandwiching the connector and covers connection portions of the wires and the electrodes. The connector covers are opposite each other when the connector covers are mounted on the connector and the connector covers hold the wires that are connected to the connector. 
     RELATED ART DOCUMENT 
     Patent Document 
     
         
         [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2003-331946 (FIG. 7(b)) 
       
    
     SUMMARY OF THE INVENTION 
     Problem to be Solved by the Invention 
     However, according to the above configuration, the connector necessarily requires the pair of connector covers and this increases the number of components of the connector and increases a manufacturing cost. 
     The technology described herein was made in view of the above circumstances. An object is to provide a connector that contributes to a reduction of a number of components. 
     Means for Solving the Problem 
     A connector according to the present disclosure includes a terminal connected to a front end portion of an electric wire and a housing in which the terminal is arranged. The housing includes a base portion and a cover member. The electric wire extending rearward from a portion of the housing that has the terminal therein is disposed on the base portion. The cover member is movable between a position in which the cover member covers the base portion and a position in which the cover member is away from the base portion. The cover member includes a wire pressing portion that presses the electric wire disposed on the base portion toward the base portion when the cover member is in the position in which the cover member covers the base portion. 
     Advantageous Effects of Invention 
     According to the technology disclosed herein, the number of components included in a connector can be reduced. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an enlarged cross-sectional view illustrating a portion of a connector according to a first embodiment. 
         FIG. 2  is a cross-sectional view illustrating the connector. 
         FIG. 3  is a perspective view illustrating an upper cover member and a lower cover member that are opened. 
         FIG. 4  is a rear view illustrating the connector. 
         FIG. 5  is a perspective view illustrating the connector. 
         FIG. 6  is a cross-sectional view illustrating a connector according to a second embodiment. 
         FIG. 7  is a perspective view illustrating the connector. 
         FIG. 8  is a rear view illustrating the connector. 
         FIG. 9  is a cross-sectional view illustrating a connector according to a third embodiment. 
         FIG. 10  is an enlarged cross-sectional view illustrating a portion of a wire pressing portion that presses the wire. 
         FIG. 11  is an enlarged cross-sectional view illustrating the portion of the wire pressing portion that presses the wire. 
         FIG. 12  is a cross-sectional view illustrating an upper cover member and a lower cover member that are away from a base portion. 
         FIG. 13  is an enlarged cross-sectional view illustrating a portion of the wire pressing portion that is contacted with the wire. 
         FIG. 14  is an enlarged cross-sectional view illustrating a portion of a contact portion that is contacted with the wire. 
         FIG. 15  is an enlarged cross-sectional view illustrating a portion of the wire pressing portion that is pressed into an insulating cover member of the wire. 
         FIG. 16  is an enlarged rear view illustrating a portion of a wire pressing portion according to a third embodiment. 
         FIG. 17  is an enlarged rear view illustrating a portion of a wire pressing portion according to a fourth embodiment. 
         FIG. 18  is a perspective view illustrating a rear holder according to a fifth embodiment. 
         FIG. 19  is a rear view illustrating the rear holder. 
         FIG. 20  is a side view illustrating the rear holder. 
         FIG. 21  is a perspective view illustrating the rear holder and an outer housing. 
         FIG. 22  is a perspective view illustrating the outer housing that receives the rear holder therein. 
         FIG. 23  is a side view illustrating the outer housing that receives the rear holder therein. 
         FIG. 24  is an enlarged rear view illustrating portions of the upper cover member and the lower cover member having a small gap therebetween. 
         FIG. 25  is an enlarged rear view illustrating the portions of the upper cover member and the lower cover member in which rattling is suppressed. 
         FIG. 26  is an exploded perspective view illustrating a connector according to other embodiment (4). 
     
    
    
     MODES FOR CARRYING OUT THE INVENTION 
     Description of Embodiments According to the Present Disclosure 
     First, embodiments according to the present disclosure will be listed and described. 
     (1) A connector according to the present disclosure includes a terminal connected to a front end portion of an electric wire and a housing in which the terminal is arranged. The housing includes a base portion and a cover member. The electric wire extending rearward from a portion of the housing that has the terminal therein is disposed on the base portion. The cover member is movable between a position in which the cover member covers the base portion and a position in which the cover member is away from the base portion. The cover member includes a wire pressing portion that presses the electric wire disposed on the base portion toward the base portion when the cover member is in the position in which the cover member covers the base portion. 
     The electric wire is held between the base portion and the cover member is included in the housing. This reduces the number of components compared to a configuration including a cover that is a separate component from the housing. This also reduces manufacturing cost of the connector. 
     Since the electric wire is held between the base portion and the wire pressing portion, an external force that is applied to the electric wire is less likely to be transferred to the terminal. 
     (2) The connector may further include an outer housing in which the housing is arranged and that covers the cover member from an outer side. 
     Since the outer housing covers the cover member, the cover member is less likely to be opened. Therefore, the electric wire is surely held by the cover member. 
     (3) The cover member may include at least two cover members that are disposed to sandwich the base portion. 
     The electric wire is arranged to sandwich the base portion and is arranged on one surface and another surface of the base portion. In such a connector, the electric wire that is arranged on the two surfaces of the base portion can be pressed by the at least two cover members that are arranged to sandwich the base portion. 
     (4) One cover member of the at least two cover members may include a stopper member that projects toward other cover member of the at least two cover members sandwiching the base portion. The stopper member may be fitted to the other cover member when the cover members are in the position in which the cover members cover the base portion. 
     The stopper member suppresses the cover members from being opened. 
     (5) The connector may further include an outer housing in which the housing is arranged. One of the one cover member and the other cover member may include a rib that projects from an outer surface of the one of the one cover member and the other cover member. The outer housing may include a retainer portion that presses the rib toward another one of the one cover member and the other cover member. 
     When the one cover member and the other cover member are locked by the stopper member, a small gap is generally provided in a locking portion. This may cause rattling between the one cover member and the other cover member. The rattling may decrease the pressing force of the electric wire pressing portion that presses the electric wire and the holding properties of the housing that holds the electric wire may be lowered. The rib included in the one of the one cover member and the other cover member is pressed toward the other cover member by the retainer portion included in the outer housing. This suppresses the rattling between the one cover member and the other cover member and the wire holding properties of the housing can be improved. 
     (6) The one cover member and the other cover member may be fitted together in an upper-lower direction that crosses a direction in which the electric wire extends. The rib may be on a side portion of the one of the one cover member and the other cover member with respect to a right-left direction that crosses the direction in which the electric wire extends and the upper-lower direction. 
     The rib that is on the end portion with respect to the right-left direction suppress the overlapping portion of the one cover member and the other cover member from being separated from each other unlike a configuration that the rib is on the end portion with respect to the upper-lower direction. 
     (7) The outer housing may include a receiver portion that has an opening portion opening rearward and in which the housing is inserted through the opening portion. The retainer portion may have a recessed shape that is recessed from a rear surface of an opening edge of the opening portion. The rib may be on a rear portion of the one of the one cover member and the other cover member and is arranged in the retainer portion. An inner surface of the retainer portion may be contacted with the rib in a direction toward the other one of the one cover member and the other cover member such that the one of the one cover member and the other cover member is pressed toward the other one of the one cover member and the other cover member. 
     The retainer portion has a recessed shape recessed from the rear surface of the opening edge. The rib is on the rear portion of the cover member. Therefore, the rib is not pressed by the retainer portion while the housing is being inserted into the outer housing. Accordingly, the operability of inserting the housing into the outer housing can be improved compared to a configuration that the rib is on a front portion of the cover member. 
     (8) The connector according to claim  7 , wherein the cover member may include a projection that projects from an outer surface of the cover member and is contacted with an inner surface of the receiver portion. 
     Since the projection is contacted with the inner surface of the receiver portion, the cover member is less likely to be curved. 
     (9) The housing may include a strain relief portion that holds the electric wire to be curved with respect to a direction crossing a front-rear direction. The strain relief portion may be on a rear side with respect to the wire pressing portion. 
     The electric wire is kept in the curved state with respect to the front-rear direction by the strain relief portion. Therefore, the external force that is applied to the electric wire is absorbed by the curved portions. Accordingly, the external force that is applied to the electric wire is surely suppressed from being transferred to the terminal. 
     (10) The connector may further include a holding member that is wrapped around the housing. The holding member may be wrapped around a portion of the housing that is on a rear side with respect to the wire pressing portion while the electric wire being held between the cover member and the base portion. 
     The holding member suppresses the cover member from being opened. Therefore, the electric wire is firmly held between the base portion and the cover member. 
     (11) The cover member may include an auxiliary projection in a portion thereof around which the holding member is wrapped and the auxiliary projection may project toward the electric wire. 
     The pressure force that is applied by the holding member is surely transferred to the electric wire via the auxiliary projection. Accordingly, the electric wire can be firmly held by the cover member. 
     (12) The terminal may include a holding portion that holds the electric wire and a shell that is fitted to the holding portion such that the holding portion is within the shell. The shell may include a pressing portion that presses the holding portion toward the electric wire. 
     The holding portion that is pressed by the pressing portion of the shell holds the electric wire. According to such a configuration, the electric wire can be electrically connected to the terminal. Therefore, a large-scale investment in equipment such as a pressing jig is not necessary and manufacturing cost can be reduced. 
     (13) The cover member may be pivotably moved from the position in which the cover member is away from the base portion to the position in which the cover member covers the base portion. The wire pressing portion may project from the cover member and include a contact portion having an angled shape. The contact portion may first come in contact with the electric wire when the cover member is pivoted to the position in which the cover member covers the base portion. 
     Since the contact portion has an angled shape, the wire pressing portion is easily pressed into the electric wire when the cover member is pivoted and moved from the position in which the cover member is away from the base portion to the position in which the base portion is covered (when the cover member is closed). This improves a holding force of holding the electric wire. Compared to a configuration including a round contact portion, the cover member is closed easily and assembling properties of the connector are improved. 
     (14) The wire pressing portion may include a standing surface that is a plane surface and extends from the cover member and a top surface that is a plane surface and extends from a distal end of the standing surface rearward in the extending direction in which the wire extends. The contact portion may be an angled portion between the standing surface and the top surface and an angle formed by the standing surface and the top surface may be 90 degrees or smaller. 
     According to such a configuration, the contact portion first comes in contact with the electric wire when the cover member is pivoted to be closed. 
     (15) The cover member may have a base surface that is continuous from a basal end of the wire pressing portion and the base surface may be contacted with the electric wire when the cover member covers the base portion. 
     Since the base surface is contacted with the electric wire, the wire pressing portion is less likely to be pressed into the electric wire excessively. This suppresses the insulating cover member of the electric wire from being torn. 
     DETAILED DESCRIPTION OF THE TECHNOLOGY DESCRIBED HEREIN 
     Embodiments of the present technology will be described. The present technology described herein is not limited to the following embodiments but may be defined by the scope of the claims and include any equivalents of the scope of the claims and any modifications within the scope of the claims. 
     First Embodiment 
     A first embodiment will be described with reference to  FIGS. 1 to 5 . A connector  10  in this embodiment is mounted in a vehicle such as an automobile and is to be fit to a target connector that is connected to ends of wires or a device. Hereinafter, a Z-direction corresponds to an upward direction, a Y-direction corresponds to a frontward direction, and an X-direction corresponds to a leftward direction. 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. 
     [Connector  10 ] 
     As illustrated in  FIG. 1 , the connector  10  includes terminals  20  that are connected to electric wires  11 , a housing  41 , and an outer housing  50 . A rear holder  60  is disposed on a rear end side of the housing  41  and keeps positions of the terminals  20  that are arranged in the housing  41 . The electric wires  11  include core wires  12  made of copper, copper alloy, aluminum, aluminum alloy, or other material and insulating cover members  13  that are made of insulating synthetic resin and surround and cover the respective core wires  12 . 
     [Terminal  20 ] 
     As illustrated in  FIG. 1 , the terminal  20  includes a terminal body portion  21  and a shell  30  that is fitted to the terminal body portion  21  from an outer side. The terminal body portion  21  is a female terminal made of metal such as copper, copper alloy, aluminum, aluminum alloy, or other materials. The terminal body portion  21  includes a tubular portion  22  that has a square tubular shape and a wire connection portion  24  that is continuous rearward from the tubular portion  22  and connected to the electric wire  11 . The terminal body portion  21  further includes an elastic contact piece  23  that is arranged in the tubular portion  22  and the elastic contact piece  23  is to be connected to a target male terminal. The terminal body portion  21  further includes an upper holding portion  26 A and a lower holding portion  26 B on a rear end side of the wire connection portion  24 . The upper and lower holding portions  26 A,  26 B extend rearward and sandwich the core wire  12 . 
     The upper holding portion  26 A and the lower holding portion  26 B have a form of rectangular plate, and extend rearward from rear end portions of an upper wall and a rear wall of the wire connection portion  24 , respectively. 
     [Shell  30 ] 
     The shell  30  is made of metal such as copper, copper alloy, aluminum, aluminum alloy, or other materials or made of hard synthetic resin and is formed in a square tubular shape that can receive the wire connection portion  24 , the upper holding portion  26 A, and the lower holding portion  26 B therein. The shell  30  includes an upper pressing portion  31 A and a lower pressing portion  31 B in a rear portion thereof and the pressing portions  31 A,  31 B are for pressing the pair of holding portions  26 A,  26 B. The upper pressing portion  31 A and the lower pressing portion  31 B are portions of an upper wall and a lower wall of the shell  30  that project inwardly. The upper pressing portion  31 A and the lower pressing  31 B are formed to extend in an area corresponding to a length of the upper holding portion  26 A and the lower holding portion  26 B with respect to the front-rear direction such that a distance between the upper wall and the lower wall becomes smaller in the area. 
     [Housing  41 ] 
     As illustrated in  FIG. 2 , the connector  10  includes the housing  41  in which the terminals  20  are arranged and that is made of insulating synthetic resin and the outer housing  50  that is fitted to the housing  41  and made of insulating synthetic resin. The housing  41  has a flat rectangular parallelepiped shape and includes cavities  42  that are arranged in an upper-lower direction and a right-left direction. The cavities  42  on an upper level and those on a lower level are arranged in a zig-zag form. With respect to the right-left direction, the cavities  42  on the lower level are arranged such that a middle (a center axis) of the cavities  42  on the lower level with respect to the right-left direction is at a middle between the adjacent cavities  42  on the upper level. 
     As illustrated in  FIG. 3 , the housing  41  includes a stopper  48  and a provisional stopper  47  on each of two side walls of the housing  41 . The provisional stopper  47  and the stopper  48  are arranged in the front-rear direction on an outer surface of a rear portion of each side wall. Each of the provisional stopper  47  and the stopper  48  has a front portion of a step form and a rear portion that has a sloped surface that is inclined such that a projection dimension is decreased as it extends rearward. 
     As illustrated in  FIG. 2 , the outer housing  50  has a square box shape opening on a rear side and having a closed front portion. The housing  41  is fitted in the outer housing from the rear side. The outer housing  50  includes a locking member (not illustrated) on the inner surface thereof and the locking member is locked on an outer surface of the housing  41  to keep the fitting of the housing  41  and the outer housing  50 . 
     [Rear Holder  60 ] 
     The rear holder  60  is made of insulating synthetic resin and, as illustrated in  FIG. 2 , includes a body member  61 , an upper cover member  74 A, and a lower cover member  74 B. The body member  61  has a flat rectangular parallelepiped shape. The upper cover member  74 A and the lower cover member  74 B are connected to a rear portion of the body member  61  via hinges so as to be pivoted around the hinges  73 , respectively. The hinges  73  are formed in a thin belt-like shape and can be deformed to be warped. The upper cover member  74 A and the lower cover member  74 B are movable between two positions including a first position in which the upper cover member  74 A and the lower cover member  74 B cover an upper surface and a lower surface of a base portion  70 , respectively, and a second position in which the upper cover member  74 A and the lower cover member  74 B are away from the base portion  70 . The upper cover member  74 A and the lower cover member  74 B are pivotable around the hinges  73 , respectively. As illustrated in  FIG. 2 , the body member  61  includes two fitting frames  72  in two side portions thereof, respectively, and the fitting frames  72  extend frontward. 
     As illustrated in  FIG. 1 , the rear holder  60  includes a terminal stopper portion  62  that projects inward from an upper wall of the rear holder  60 . The rear end portion of the shell is contacted with the terminal stopper portion  62  and the terminal is held in the cavity  42  of the housing so as not to come out from the cavity  42  toward the rear side. 
     As illustrated in  FIG. 2 , the body member  61  includes the base portion  70  in a rear portion thereof and the electric wires  11  are disposed on both surfaces of the base portion  70 . The electric wires  11  extend rearward from the cavities  42  that receive the terminals  20  therein and the extended electric wires  11  are arranged on the base portion  70 . As illustrated in  FIG. 4 , the base portion  70  includes wire routing grooves  71  on upper and lower surfaces thereof. The wire routing grooves  71  are arranged in the right-left direction to form a wave shape in the right-left direction while following outer peripheral surfaces of the electric wires  11 . 
     As illustrated in  FIG. 3 , the fitting frames  72  can be deformed to be warped with respect to the right-left direction and include rectangular fitting holes  72 A therethrough, respectively. The provisional stopper  47  or the stopper  48  is stopped by a hole edge of the fitting hole  72 A. 
     As illustrated in  FIG. 2 , each of the upper cover member  74 A and the lower cover member  74 B includes wire pressing portions  75  that project toward the electric wires  11 . The wire pressing portions  75  are for pressing the electric wires  11  that are disposed in the wire routing grooves  71  on the both surfaces of the base portion  70 . The wire pressing portion  75  projects to be formed in a tapered shape and extends in an entire width of the cover member in the right-left direction. 
     As illustrated in  FIG. 3 , the lower cover member  74 B includes cover locking portions  76  that project outward from side walls of the lower cover member  74 B, respectively. The upper cover member  74 A includes cover locking receivers  77  corresponding to the respective cover locking portions  76 . The cover locking receiver  77  has a frame shape and is elastically deformable. The cover locking portions  76  and the cover locking receivers  77  are elastically fitted to each other such that the upper cover member  74 A and the lower cover member  74 B are maintained in a closed state. 
     As illustrated in  FIG. 5 , the upper cover member  74 A includes a stopper member  78  in a rear end portion thereof and the stopper member  78  projects from a middle portion of the upper cover member  74 A with respect to the right-left direction. The stopper member  78  projects from the upper cover member  74 A toward the lower cover member  74 B when the upper cover member  74 A and the lower cover member  74 B cover the base portion  70 . The stopper member  78  is a plate ember that is elastically deformed. The stopper member  78  includes a stopper projection  79  at a distal end thereof. The middle portion with respect to the right-left direction includes the middle portion with respect to the right-left direction and also includes a substantially middle portion with respect to the right-left direction that may not be an exact middle portion. 
     As illustrated in  FIG. 2 , the lower cover member  74 B includes a stopper receiver  80  corresponding to the stopper member  78  and the stopper projection  79  is fitted to the stopper receiver  80 . When the upper cover member  74 A and the lower cover member  74 B are in the position in which the cover members cover the base portion  70 , the stopper member  78  are elastically fitted to the stopper receiver  80  in the respective middle portions of the upper cover member  74 A and the lower cover member  74 B with respect to the right-left direction. This suppresses the upper cover member  74 A and the lower cover member  74 B from being opened in the upper-lower direction in the middle portion thereof. 
     As illustrated in  FIG. 5 , when the housing  41  is fitted in the outer housing  50 , the outer housing  50  covers outer peripheries of the upper cover member  74 A and the lower cover member  74 B. 
     [One Example of a Process of Producing Connector  10 ] 
     A process of producing the connector  10  will be described. The process of producing the connector  10  is not limited to the one described below. 
     The shell  30  is fitted to the rear end portion of the terminal body portion  21  of the terminal  20  and the terminal  20  is set in the cavity  42  of the housing  41 . The rear holder  60  is provisionally fitted to the housing  41  by fitting the fitting frames  72  of the rear holder  60  to the provisional stoppers  47  of the housing  41 . 
     Next, the insulating cover members  13  are removed from the end portions of the electric wires  11  such that the core wires  12  are exposed therefrom and the electric wires  11  including exposed core wires  12  are inserted into the rear holder  60  from the rear side. The electric wires  11  are inserted through a space between the upper pressing portion  31 A and the lower pressing portion  31 B and into a space between the upper holding portion  26 A and the lower holding portion  26 B. Next, the shell  30  is moved frontward with sliding with respect to the terminal body portion  21 . Accordingly, as illustrated in  FIG. 1 , the upper holding portion  26 A is pressed and deformed by the upper pressing portion  31 A and the lower holding portion  26 B is pressed and deformed by the lower pressing portion  31 B. Thus, the upper holding portion  26 A and the lower holding portion  26 B hold the core wire  12  of the electric wire  11 . 
     Next, the rear holder  60  is moved frontward with respect to the housing  41 . Then, the fitting between the provisional stopper  47  and the rear holder  60  is released and the fitting frames  72  come in contact with the stoppers  48  and are deformed and warped by the stoppers  48 . Accordingly, the fitting frames  72  are fitted to the stoppers  48  and become in a fitting state. 
     Next, the upper cover member  74 A is pivoted downward and the lower cover member  74 B is pivoted upward. The cover locking portions  76  and the cover locking receivers  77  are fitted to each other and the stopper member  78  and the stopper receiver  80  are fitted to each other. Then, the outer housing  50  is mounted on the housing  41  from the front side and the connector  10  is obtained. 
     [Operations and Advantageous Effects of the Present Embodiment] 
     According to this embodiment, following operations and advantageous effects are obtained. The connector  10  of this embodiment includes the terminals  20  that are connected to the front end portions of the electric wires  11 , respectively, and the housing  41  in which the terminals  20  are arranged. The housing  41  is equipped with the base portion  70 , the upper cover member  74 A, and the lower cover member  74 B. The electric wires  11  extend rearward from the portion where the terminals  20  are arranged and extended electric wires  11  are disposed on the base portion  70 . The upper cover member  74 A and the lower cover member  74 B are movable between a position where the cover members  74 A,  74 B cover the base portion  70  and a position where the cover members  74 A,  74 B are away from the base portion  70 . The upper cover member  74 A and the lower cover member  74 B include the wire pressing portions  75 . The wire pressing portions  75  press the electric wires  11 , which are disposed on the base portion  70 , toward the base portion  70  when the cover members  74 A,  74 B are in the position where the cover members  74 A,  74 B cover the base portion  70 . 
     The electric wires  11  are held between the base portion  70  and each of the upper cover member  74 A and the lower cover member  74 B that are included in the housing  41 . This reduces the number of components compared to a configuration including a cover that is a separate component from the housing  41 . This also reduces manufacturing cost of the connector  10 . 
     Since the electric wires  11  are held between the base portion  70  and the wire pressing portions  75 , an external force that is applied to the electric wires  11  is less likely to be transferred to the terminals  20 . 
     According to this embodiment, the housing  41  is fitted in the outer housing  50  and the outer housing  50  covers the upper cover member  74 A and the lower cover member  74 B from an outer side. 
     Since the outer housing  50  covers the upper cover member  74 A and the lower cover member  74 B, the upper cover member  74 A and the lower cover member  74 B are less likely to be opened. Therefore, the electric wires  11  are surely held by the cover member. 
     According to this embodiment, the base portion  70  is between the upper cover member  74 A and the lower cover member  74 B in the housing  41 . 
     The electric wires  11  are arranged to sandwich the base portion  70  and are arranged on an upper surface and a lower surface of the base portion  70 . In such a connector  10 , the electric wires  11  that are arranged on the two surfaces of the base portion  70  can be pressed by the upper cover member  74 A and the lower cover member  74 B that are arranged to sandwich the base portion  70 . 
     According to this embodiment, the upper cover member  74 A includes the stopper member  78 . The stopper member projects toward the lower cover member  74 B that is disposed to sandwich the base portion  70  with the upper cover member  74 A. The stopper member  78  is fitted to the lower cover member  74 B when the cover members cover the base portion  70 . 
     The stopper member  78  suppresses the cover members from being opened. 
     According to this embodiment, the stopper member is in the middle portion of the upper cover member with respect to the right-left direction (a direction crossing a direction in which the electric wires  11  extend). 
     The stopper member  78  is in the middle portion of the cover member with respect to the direction crossing the direction in which the electric wires  11  extend. This further suppresses the upper cover member  74 A and the lower cover member  74 B from being opened. 
     According to this embodiment, the terminal  20  includes the upper holding portion  26 A and the lower holding portion  26 B that hold the electric wire  11  and the shell  30  that is fitted to the upper holding portion  26 A and the lower holding portion  26 B from the outer side. The shell  30  includes the upper pressing portion  31 A and the lower pressing portion  31 B that press the upper holding portion  26 A and the lower holding portion  26 B toward the electric wire  11 . 
     The upper holding portion  26 A and the lower holding portion  26 B that are pressed by the upper pressing portion  31 A and the lower pressing portion  31 B of the shell hold the electric wire  11 . According to such a configuration, the electric wires  11  can be electrically connected to the terminals  20 . Therefore, a large-scale investment in equipment such as a pressing jig is not necessary and manufacturing cost can be reduced. 
     Second Embodiment 
     Next, a connector  90  according to a second embodiment of the present disclosure will be described with reference to  FIGS. 6 to 8 . As illustrated in  FIG. 6 , a rear holder  91  includes a strain relief portion  92  on a rear side with respect to the wire pressing portions  75 . The strain relief portion  92  projects downward from the upper wall of the rear holder  91 . The strain relief portion  92  includes a front surface and a rear surface that are relatively gentle sloped surfaces. The electric wires  11  extend in the front-rear direction and are curved and recessed downward along the sloped surfaces of the strain relief portion  92 . The strain relief portion  92  projects from the upper wall of the rear holder  91  by a projecting dimension that is greater than a diameter of the electric wire  11 . 
     As illustrated in  FIG. 6 , the rear holder  91  includes upper auxiliary projections  93 A and lower auxiliary projections  93 B on a rear side with respect to the strain relief portion  92 . The upper auxiliary projections  93 A and the lower auxiliary projections  93 B project toward the electric wires  11 . The upper cover member  94 A includes the upper auxiliary projections  93 A and the lower cover member  94 B includes the lower auxiliary projections  93 B. The upper auxiliary projections  93 A are opposite the lower auxiliary projections  93 B, respectively, when the upper cover member  94 A and the lower cover member  94 B are closed. The upper auxiliary projections  93 A and the lower auxiliary projections  93 B extend in the right-left direction. Two rows of the upper auxiliary projections  93 A are arranged in the front-rear direction and two rows of the lower auxiliary projections  93 B are arranged in the front-rear direction. The electric wires  11  are held between the upper auxiliary projections  93 A and the lower auxiliary projections  93 B when the upper cover member  94 A and the lower cover member  94 B are closed. 
     As illustrated in  FIG. 7 , a holding member  95  is wrapped around the upper cover member  94 A and the lower cover member  94 B when the upper cover member  94 A and the lower cover member  94 B are closed. The upper cover member  94 A and the lower cover member  94 B are pressed toward the electric wires  11  by the holding member  95 . The holding member  95  includes a band member  96  having a belt-like shape and a stopper  97 . The stopper  97  fixes end portions of the band member  96  so as not to be free. The holding member  95  may be made of synthetic resin or may be made of metal. The holding member  95  may have a known configuration. 
     As illustrated in  FIG. 6 , the upper cover member  94 A and the lower cover member  94 B include grooves  98 , respectively, in which the holding member  95  is fitted in. The grooves  98  have a width that extends in the front-rear direction and the width is equal to or slightly greater than the width of the holding member  95  with respect to the front-rear direction. The upper auxiliary projections  93 A and the lower auxiliary projections  93 B are formed corresponding to the grooves  98 . Namely, the upper auxiliary projections  93 A are below the groove  98  of the upper cover member  94 A and the lower auxiliary projections  93 B are above the groove  98  of the lower cover member  94 B. According to such a configuration, the force that is applied toward the wires by the holding member  95  is directly transferred to the upper auxiliary projections  93 A and the lower auxiliary projections  93 B. 
     As illustrated in  FIG. 8 , the grooves  98  are curved to slightly project in the upper-lower direction seen from the rear side. According to such a configuration, the holding member  95  is less likely to be lifted up in the middle portions of the upper cover member  94 A and the lower cover member  94 B with respect to the right-left direction. Accordingly, the force that is applied toward the electric wires  11  by the holding member  95  is surely transferred to the electric wires  11 . 
     As illustrated in  FIG. 8 , the rear holder  91  includes a wire outlet  99  through which the electric wires  11  extends outside. The wire outlet  99  is a thin elongated hole that extends in the right-left direction and is curved to project upward seen from the rear side. 
     [Operations and Advantageous Effects of the Present Embodiment] 
     Next, operations and advantageous effects of this embodiment will be described. According to this embodiment, the rear holder  91  includes the strain relief portion  92  on a rear side with respect to the wire pressing portions  75 . The strain relief portion  92  keeps the electric wires  11  in a curved state with respect to the front-rear direction. 
     The electric wire  11  is kept in the curved state with respect to the front-rear direction by the strain relief portion  92 . Therefore, the external force that is applied to the electric wires  11  is absorbed by the curved portions. Accordingly, the external force that is applied to the electric wires  11  is surely suppressed from being transferred to the terminals  20 . 
     Configurations other than the above-described ones are similar to those of the first embodiment. The components same as those of the first embodiment are indicated by the reference signs of the first embodiment and will not be described. 
     According to this embodiment, the holding member  95  is wrapped around the housing  41  and the holding member  95  is put around a portion of the housing  41  that is on a rear side with respect to the wire pressing portion  75  while the electric wires  11  being held between the upper cover member  74 A and the lower cover member  74 B. 
     The holding member  95  suppresses the upper cover member  74 A and the lower cover member  74 B from being opened. Therefore, the electric wires  11  are firmly held between the base portion  70  and each of the upper cover member  74 A and the lower cover member  74 B. 
     According to this embodiment, the upper cover member  94 A and the lower cover member  94 B include the upper auxiliary projections  93 A and the lower auxiliary projections  93 B, respectively, in the portions of the cover members that are wrapped by the holding member  95 . The upper auxiliary projections  93 A and the lower auxiliary projections  93 B project toward the electric wires  11 . 
     The pressure force that is applied by the holding member  95  is surely transferred to the electric wires  11  via the upper auxiliary projections  93 A and the lower auxiliary projections  93 B. Accordingly, the electric wires  11  can be firmly held by the upper cover member  74 A and the lower cover member  74 B. 
     Third Embodiment 
     Next, a third embodiment of the present disclosure will be described with reference to  FIGS. 9 to 15 . As illustrated in  FIG. 9 , a rear holder  101  of a connector  100  of this embodiment includes wire pressing portions  102 . Rows (two rows in this embodiment) of the pressing portions  102  are arranged at an interval in the front-rear direction. The wire pressing portions  102  project downward from a lower surface  108  (one example of a base surface) of an upper cover member  103  of the rear holder  101  and the wire pressing portions  102  project upward from an upper surface  109  (one example of the base surface) of a lower cover member  104  of the rear holder  101 . 
     As illustrated in  FIG. 10 , the wire pressing portion  102  has a standing surface  105  that extends from the lower surface  108  of the upper cover member  103  and the wire pressing portion  102  has the standing surface  105  that extends from the upper surface  109  of the lower cover member  104 . The standing surfaces  105  extends in a direction crossing the front-rear direction when the upper cover member  103  and the lower cover member  104  are closed. 
     The wire pressing portion  102  has a top surface  106  that extends rearward from an extended end of the standing surface  105  when the upper cover member  103  and the lower cover member  104  are closed. 
     The wire pressing portion  102  includes a contact portion  107  at a border between the standing surface  105  and the top surface  106 . The contact portion  107  has an angled shape. The contact portion  107  extends in the right-left direction. The contact portion  107  first comes in contact with the electric wire  11  among the portions of the wire pressing portion  102  when the upper cover member  103  and the lower cover member  104  are pivoted around the hinges  73 , which are rotation axes, to be closed to cover the base portion  70 . 
     The angle that is formed by the standing surface  105  and the top surface  106  is not particularly limited but may be 90 degrees or smaller. In this embodiment, the angle is substantially 90 degrees. The angle that is substantially degrees includes 90 degrees but may not be exactly 90 degrees and may be any angles ranging from 85 degrees to 95 degrees, inclusive. 
     In this embodiment, the rear portion of the wire pressing portion  102  has a surface that is sloped from the top surface  106  toward the lower surface of the upper cover member  103  or the upper surface of the lower cover member  104  as the surface extends rearward. The wire pressing portion  102  has a tapered side-view shape toward the top surface  106  from the upper cover member  103  or the lower cover member  104 . 
     As illustrated in  FIG. 11 , the lower surface  108  of the upper cover member  103  is contacted with the electric wires  11  from the above when the upper cover member  103  and the lower cover member  104  are closed. Although details are not illustrated, the upper surface  109  of the lower cover member  104  is contacted with the electric wires  11  from the lower side. The distal end portion of the wire pressing portion  102  is not contacted with the core wires of the electric wires  11  when the wire pressing portion  102  is contacted with the electric wires  11 . 
     Configurations other than the above-mentioned ones are similar to the configurations of the first embodiment. The components same as those of the first embodiment are indicated by the reference signs of the first embodiment and will not be described. 
     Next, operations and advantageous effects of this embodiment will be described.  FIG. 12  illustrates the upper cover member  103  that is away from the electric wire  11 . The upper cover member  103  is pivoted around the hinge  73 , which is a rotation axis, to be closer to the base portion. Then, as illustrated in  FIGS. 13 and 14 , the contact portion  107  of the wire pressing portion  102  comes in contact with the insulating cover member of the electric wire  11  from the above. Since the contact portion  107  has an angled shape, the contact portion  107  of the wire pressing portion  102  is pressed into the insulating cover member  13  of the electric wire  11 . 
     According to the further pivoting of the upper cover member  103  around the hinge  73 , which is the rotation axis, the top surface  106  of the wire pressing portion  102  is pressed into the insulating cover member  13  of the electric wire  11  as illustrated in  FIG. 15 . 
     As illustrated in  FIG. 10 , when the upper cover member  103  is fixed in a state in which the upper cover member  103  covers the base portion  70 , the standing surface  105  of the wire pressing portion  102  is in a vertical state and the top surface  106  extends in the front-rear direction. According to such a configuration, if the electric wire  11  is pulled rearward, the standing surface  105  of the wire pressing portion  102  receives a force that is created when the electric wire  11  is pulled rearward. 
     In this embodiment, the upper cover member  103  and the lower cover member  104  can be pivotably moved from the position in which the cover members are away from the base portion  70  to the position in which the base portion  70  is covered with the cover members. The pressing portion  102  projects from each of the upper cover member  103  and the lower cover member  104 . The contact portion  107  that has an angled shape first comes in contact with the electric wire  11  among the portions of the wire pressing portion  102  when the upper cover member  103  and the lower cover member  104  are pivoted and moved to the position in which the base portion  70  is covered. 
     Since the contact portion  107  has an angled shape, the wire pressing portion  102  is easily pressed into the electric wire  11  when the upper cover member  103  and the lower cover member  104  are pivoted and moved from the position in which the cover members are away from the base portion  70  to the position in which the base portion  70  is covered (when the upper cover member  103  and the lower cover member  104  are closed). This improves a holding force of holding the electric wires  11 . Compared to a configuration including a round contact portion  107 , the upper cover member  103  and the lower cover member  104  are closed easily and assembling properties of the connector  10  are improved. 
     In this embodiment, the wire pressing portions  102  of the upper cover member  103  and the lower cover member  104  include the standing surfaces  105  and the top surfaces  106 . The standing surfaces  105  are plane surfaces and project from the upper cover member  103  and the lower cover member  104  and the top surfaces  106  are plane surfaces and extend from the ends of the standing surfaces  105  rearward in the extending direction of the electric wires  11 . The contact portion  17  is the angled portion between the standing surface  105  and the top surface  106 . The angle that is formed by the standing surface  105  and the top surface  106  is 90 degrees or smaller. 
     According to such a configuration, the contact portion  107  first comes in contact with the electric wire  11  when the upper cover member  103  and the lower cover member  104  are pivoted to be closed. 
     In this embodiment, the wire pressing portion  102  is tapered from a basal portion thereof that is close to the upper cover member  103  or the lower cover member  104  toward the top surface  106 . 
     According to such a configuration, the wire pressing portion  102  is easily pressed into the electric wire  11 . 
     In this embodiment, the basal portion of the wire pressing portion  102  is continuous from the lower surface  108  of the upper cover member  103  and the basal portion of the wire pressing portion  102  is continuous from the upper surface  109  of the lower cover member  104 . The lower surface  108  of the upper cover member  103  and the upper surface  109  of the lower cover member  104  are contacted with the electric wires  11  when the upper cover member  103  and the lower cover member  104  cover the base portion  70 . 
     Since the lower surface  108  of the upper cover member  103  and the upper surface  109  of the lower cover member  104  are contacted with the electric wires  11 , the wire pressing portions  102  are less likely to be pressed into the electric wire  11  excessively. This suppresses the insulating cover member  13  of the electric wire  11  from being torn. 
     In this embodiment, each of the upper cover member  103  and the lower cover member  104  includes the wire pressing portions  102 . 
     Since the wire pressing portions  102  are included, the holding force of holding the electric wires  11  can be further improved. 
     Fourth Embodiment 
     Next, wire pressing portions  110  according to a fourth embodiment of the present disclosure will be described with reference to  FIG. 16 . In this embodiment, the wire pressing portions  110  are arranged at intervals in the right-left direction. The interval between the wire pressing portions  110  that are adjacent to each other in the right-left direction is smaller than a diameter of the electric wire  11 . According to such a configuration, two end portions of each wire pressing portion  110  in the right-left direction are pressed into the insulating cover member of the electric wire  11 . 
     Configurations other than the above-mentioned ones are similar to the configurations of the third embodiment. The components same as those of the third embodiment are indicated by the reference signs of the third embodiment and will not be described. 
     Fifth Embodiment 
     Next, wire pressing portions  111  according to a fifth embodiment of the present disclosure will be described with reference to  FIG. 17 . In this embodiment, the wire pressing portions  111  are arranged at intervals in the right-left direction. Each of the wire pressing portions  111  is arranged corresponding to each of the electric wires  11 . The wire pressing portion  111  has a top surface  106  that has an arched shape seen from the front-rear direction. 
     Configurations other than the above-mentioned ones are similar to the configurations of the third embodiment. The components same as those of the third embodiment are indicated by the reference signs of the third embodiment and will not be described. 
     Sixth Embodiment 
     Next, a connector  119  according to a sixth embodiment of the present disclosure will be described with reference to  FIGS. 18 to 25 . As illustrated in  FIGS. 18 and 19 , an upper cover member  121  of a rear holder  120  of this embodiment includes upper ribs  122  (one example of a rib) in a rear end portion thereof and the upper ribs  122  projects rightward and leftward, respectively. A lower cover member  123  of the rear holder  120  includes lower ribs  124  (one example of the rib) in a rear end portion thereof and the lower ribs  124  projects rightward and leftward, respectively. The rightward projection dimension and the leftward projection dimension of the upper ribs  122  and the lower ribs  124  are substantially equal. 
     As illustrated in  FIG. 20 , the upper rib  122  and the lower rib  124  include front end portions that are tapered frontward. Thus, the upper rib  122  and the lower rib  124  are tapered to become thinner as they extend frontward. 
     As illustrated in  FIGS. 21 and 22 , an outer housing  125  includes a receiver portion  127  in which a housing  126  is arranged. The receiver portion  127  has an opening  128  that opens rearward. The housing  126  is put in the receiver portion  127  through the opening  128  from the rear side. 
     The receiver portion  127  includes retainer portions  129  at right and left ends of an opening edge of the opening  128 . The retainer portion  129  has a recessed shape recessed from a rear surface of the receiver portion  127  having the opening  128 . The upper rib  122  and the lower rib  124  of the rear holder  120  are inserted in the retainer portion  129  from the rear side. 
     As illustrated in  FIGS. 22 and 23 , when the housing  126  is inserted in the receiver portion  127 , the upper rib  122  and the lower rib  124  of the rear holder  120  are contacted with an inner surface of the retainer portion  129 . Accordingly, the upper cover member  121  of the rear holder  120  is pressed downward and the lower cover member  123  of the rear holder  120  is pressed upward. As a result, the gap between the upper cover member  121  and the lower cover member  123  of the rear holder  120  becomes smaller than that before the housing  126  is put in the receiver portion  127 . 
     As illustrated in  FIG. 18 , the upper cover member  121  includes upper projections  130  (one example of a projection) on an upper surface of the upper cover member  121 . Three upper projections  130  are arranged at intervals in the right-left direction on the rear edge portion of the upper cover member  121  and project upward from the upper surface of the upper cover member  121 . A middle one among the three upper projections  130  with respect to the right-left direction is slightly greater than other ones on the right side and the left side. 
     As illustrated in  FIG. 19 , the lower cover member  123  includes lower projections  131  (one example of the projection) on a lower surface of the lower cover member  123 . Three lower projections  131  are arranged at intervals in the right-left direction on the rear edge portion of the lower cover member  123  and project downward from the lower surface of the lower cover member  123 . A middle one among the three lower projections  131  with respect to the right-left direction is slightly greater than other ones on the right side and the left side. 
     As illustrated in  FIGS. 21 and 22 , the upper projections  130  are contacted with the lower surface of the upper cover member  121  and pressed downward. Accordingly, the upper cover member  121  is pressed downward toward the lower cover member  123 . The lower projections  131  are contacted with the upper surface of the lower cover member  123  and pressed upward. Accordingly, the lower cover member  123  is pressed upward toward the upper cover member  121 . As a result, the gap between the upper cover member  121  and the lower cover member  123  of the rear holder  120  becomes smaller than the gap between the cover members before the housing  126  is arranged in the receiver portion  127 . 
     Configurations other than the above-mentioned ones are similar to the configurations of the first embodiment. The components same as those of the first embodiment are indicated by the reference signs of the first embodiment and will not be described. 
     Next, operations and advantageous effects of this embodiment will be described. As illustrated in  FIG. 20 , the upper cover member  121  and the lower cover member  123  of the rear holder  120  are closed by elastic fitting of a cover locking portion  132  and a cover locking receiver  133 . A small gap is provided between the cover locking portion  132  and the cover locking receiver  133  such that the cover locking portion  132  and the cover locking receiver  133  can be elastically fitted together. The upper cover member  121  and the lower cover member  123  have manufacturing tolerance of a component and assembly tolerance. Therefore, as illustrated in  FIGS. 20 and 24 , when the cover locking portion  132  and the cover locking receiver  133  are elastically fitted together, a gap is between the upper cover member  121  and the lower cover member  123  and this may make the upper cover member  121  and the lower cover member  123  to rattle. The rattling may decrease the pressing force of the electric wire pressing portion that presses the electric wires  11  and the holding properties of the housing  126  that holds the electric wires  11  may be lowered. 
     With respect to the above-described matters, the connector  119  of this embodiment includes the outer housing  125  in which the housing  126  is arranged. The upper cover member  121  and the lower cover member  123  include the upper ribs  122  and the lower ribs  124  that project from the outer surfaces of the upper cover member  121  and the lower cover member  123 , respectively. The outer housing  125  includes the retainer portions  129  that press the upper ribs  122  toward the lower cover member  123  and press the lower ribs  124  toward the upper cover member  121  when the housing  126  is arranged in the outer housing  125 . 
     The upper ribs  122  are pressed toward the lower cover member  123  and the lower ribs  124  are pressed toward the upper cover member  121 . This suppresses the rattling between the upper cover member  121  and the lower cover member  123  and the wire holding properties of the housing  126  can be improved (refer to  FIGS. 23 and 25 ). 
     In this embodiment, the upper cover member  121  and the lower cover member  123  are fitted together by the cover locking portion  132  and the cover locking receiver  133  in a vertical direction that crosses the direction in which the electric wires  11  extend. The upper ribs  122  and the lower ribs  124  are on the two end portions of each of the upper cover member  121  and the lower cover member  123  with respect to the right-left direction that crosses the electric wire  11  extending direction and the upper-lower direction. 
     The upper ribs  122  and the lower ribs  124  that are on the end portions with respect to the right-left direction suppress the overlapping portions of the upper cover member  121  and the lower cover member  123  from being separated from each other unlike a configuration that the upper ribs  122  and the lower ribs  124  are on the end portions with respect to the upper-lower direction. 
     According to this embodiment, the outer housing  125  includes the receiver portion  127  having the opening  128  and opening rearward. The housing  126  is inserted in the receiver portion  127  through the opening  128 . The retainer portion  129  has a recessed shape recessed from the rear surface of the opening edge of the opening  128 . One of the cover members includes the rib on the rear end portion thereof. The rib is inserted in the retainer portion  129  from the rear side. The inner surface of the retainer portion  129  is contacted with the upper rib  122  from a direction toward the lower cover member  123  (from the upper side) and is contacted with the lower rib  124  from a direction toward the upper cover member  121  (from the lower side). Thus, the upper cover member  121  and the lower cover member  123  are pressed to be closer to each other. 
     The retainer portion  129  has a recessed shape recessed from the rear surface of the opening edge. The upper ribs  122  and the lower ribs  124  are on the rear portions of the upper cover member  121  and the lower cover member  123 , respectively. Therefore, the upper ribs  122  and the lower ribs  124  are not pressed by the retainer portions  129  while the housing  126  is being inserted into the outer housing  125 . Accordingly, the operability of inserting the housing  126  into the outer housing  125  can be improved compared to a configuration that the upper ribs  122  and the lower ribs  124  are on front portions of the upper cover member  121  and the lower cover member  123 , respectively. 
     In this embodiment, the front-side portions of the upper ribs  122  and the lower ribs  124  are tapered frontward. 
     The front-side portions of the upper ribs  122  and the lower ribs  124  that are tapered can guide the housing  126  when the housing  126  is inserted into the receiver portion  127  of the outer housing  125 . 
     According to this embodiment, the upper cover member  121  and the lower cover member  123  include the upper projections  130  and the lower projections  131  that project from the outer surfaces of the upper cover member  121  and the lower cover member  123 , respectively. The upper projections  130  and the lower projections  131  are contacted with the inner surface of the receiving portion  127 . 
     Since the upper projections  130  and the lower projections  131  are contacted with the inner surface of the receiver portion  127 , the upper cover member  121  and the lower cover member  123  are less likely to be curved. 
     Other Embodiments 
     The technology disclosed herein is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments will be included in the technical scope of the technology described in the present disclosure. 
     (1) In the first embodiment and the second embodiment, the housing  41  is equipped with the rear holder  60 ,  91 ; however, the housing  41  may not be equipped with the rear holder. 
     (2) The electric wires may be crimped with a barrel to be connected to the terminals. 
     (3) The terminal may include one holding portion or three or more holding portions. 
     (4) As illustrated in  FIG. 26 , the stopper member and the stopper receiver of the first embodiment may not be included. 
     (5) The arrangement of the wire pressing portions, the strain relief portion  92 , the auxiliary projections  93 A,  93 B, and the grooves  98  with respect to the front-rear direction in the rear holder  91  is not limited to the arrangement described in the second embodiment and the arrangement thereof in the front-rear direction may be altered as appropriate. 
     (6) The stopper member  78  may not be in the middle portion with respect to the right-left direction. Two or more stopper members  78  may be included. 
     (7) One cover member or three or more cover members may be mounted on the housing. 
     (8) The number of the upper projections  130  and the number of the lower projections  131  may be one, two, four or more. 
     EXPLANATION OF SYMBOLS 
     
         
           10 ,  90 ,  100 ,  119 : connector 
           11 : electric wire 
           12 : core wire 
           13 : insulting cover member 
           20 : terminal 
           23 : elastic contact piece 
           24 : wire connection portion 
           26 A: upper holding portion 
           26 B: lower holding portion 
           30 : shell 
           31 A: upper pressing portion 
           31 B: lower pressing portion 
           41 ,  126 : housing 
           42 : cavity 
           47 : provisional stopper 
           48 : stopper 
           50 ,  125 : outer housing 
           51 : square tubular member 
           60 ,  91 ,  101 ,  120 : rear holder 
           61 : body member 
           62 : terminal stopper portion 
           70 : base portion 
           71 : wire routing groove 
           72 : fitting frame 
           72 A: fitting hole 
           73 : hinge 
           74 A,  94 A,  103 ,  121 : upper cover member 
           74 B,  94 B,  104 ,  123 : loser cover member 
           75 ,  102 ,  110 ,  111 : wire pressing portion 
           76 ,  132 : cover locking portion 
           77 ,  133 : cover locking receiver 
           78 : stopper member 
           79 : stopper projection 
           80 : stopper receiver 
           92 : strain relief portion 
           93 A: upper auxiliary projection 
           93 B: lower auxiliary projection 
           95 : holding member 
           96 : band member 
           97 : stopper 
           98 : groove 
           99 : wire outlet 
           105 : standing surface 
           106 : top surface 
           107 : contact portion 
           108 : lower surface 
           109 : upper surface 
           122 : upper rib 
           124 : lower rib 
           127 : receiver portion 
           128 : opening 
           129 : retainer portion 
           130 : upper projection 
           131 : lower projection