Patent Publication Number: US-11043757-B2

Title: Electrical connector with filler surrounding a wall that surrounds a contact

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application claims priority to and the benefit of Japanese Patent Application No. 2017-119917 filed on Jun. 19, 2017, the entire contents of which are incorporated herein by reference. 
     TECHNICAL FIELD 
     This disclosure relates to a connector. 
     BACKGROUND 
     In a conventionally known connector, a filler is placed in each of a pair of fitting objects to be fitted to each other to protect a contacting portion of a corresponding contact from foreign matter such as water or dust entering from outside when the fitting objects are fitted to each other. 
     For example, Patent Literature 1 (PTL 1) discloses a connector in which a drip-proof configuration is obtained by bringing a pair of elastic annular members of a grommet into close contact with each other when a cover and a body are fitted to each other. 
     CITATION LIST 
     Patent Literature 
     
         
         PTL 1: JP3028988 (B2) 
       
    
     SUMMARY 
     Technical Problem 
     In the above described connector, the pressure of the contact surface between fillers is reduced, which causes deterioration of the waterproof performance. The connector disclosed in PTL 1 does not have a waterproof structure and is provided without considering the above described problem. 
     It is therefore the object of this disclosure to provide a connector capable of enhancing the waterproof performance without reducing the pressure of the contact surface between fillers in a fitted state. 
     Solution to Problem 
     In order to solve the above described problem, a connector according to a first aspect includes: 
     a pair of fitting objects to be fitted to each other; and 
     a filler, a contact and a wall provided in the fitting objects, wherein 
     the wall separates the filler and the contact after the fitting objects are fitted to each other. 
     In the connector according to a second aspect, the wall may be disposed along an inner peripheral surface of the filler that surrounds the contact after the fitting objects are fitted to each other. 
     In the connector according to a third aspect, the wall may protrude to a fitting side beyond the filler after the fitting objects are fitted to each other. 
     In the connector according to a fourth aspect, the wall is provided to both of the pair of fitting objects, and one wall may be adjacent to another wall along a direction perpendicular to a fitting direction after the fitting objects are fitted to each other. 
     In the connector according to a fifth aspect, the wall may separate the filler and the contact before the fitting objects are fitted to each other. 
     In the connector according to a sixth aspect, the wall may be disposed along the inner peripheral surface of the filler that surrounds the contact before the fitting objects are fitted to each other. 
     In the connector according to a seventh aspect, the fitting objects may have a space for accommodating an excessive portion of the filler when the filler is excessive. 
     In the connector according to an eighth aspect, the space may be formed by a recess provided in an outer surface of the wall that faces the filler. 
     In the connector according to a ninth aspect, the pair of fitting objects are connected to each other by a connecting portion; the fitting objects hold a cable; and the contact may be included with electrically connected with the cable after the fitting objects are fitted to each other. 
     In the connector according to a tenth aspect, the contact has a press-contact groove; the fitting objects hold at least two of the cables; and the contact may electrically connect the cables to each other with core wires of the cables clamped by the press-contact groove after the fitting objects are fitted to each other, 
     Advantageous Effect 
     In a connector according to an embodiment of this disclosure, the waterproof performance can be enhanced without reducing a pressure of a contact surface between fillers in a fitted state. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In the accompanying drawings: 
         FIG. 1  is a perspective view of a connector, a first cable and a second cable according to an embodiment in which an insulating housing is in an expanded state; 
         FIG. 2  is a cross-sectional view taken along arrows II-II in  FIG. 1 ; 
         FIG. 3  is an enlarged perspective view illustrating a first split housing alone, omitting a relay contact; 
         FIG. 4  is an enlarged perspective view illustrating a second split housing alone; 
         FIG. 5  is a perspective view illustrating the insulating housing in its entirety, omitting the relay contact; 
         FIG. 6  is a perspective view illustrating the relay contact alone; 
         FIG. 7  is a perspective view illustrating the connector, the first cable and the second cable in transition of the insulating housing from an expanded state to a locked state; 
         FIG. 8  is a perspective view illustrating the connector, the first cable and the second cable in which the insulating housing is in the locked state; 
         FIG. 9  is a cross-sectional view taken along arrows IX-IX in  FIG. 8 ; 
         FIG. 10  is a perspective view of the insulating housing in the expanded state loaded with a filler; 
         FIG. 11  is a cross-sectional view corresponding to  FIG. 9  and illustrating the insulating housing loaded with a filler in transition from the expanded state to the locked state; 
         FIG. 12  is a cross-sectional view illustrating the insulating housing loaded with a filler in transition from the expanded state to the locked state taken along arrows XII-XII in  FIG. 8 ; 
         FIG. 13  is a cross-sectional view corresponding to  FIG. 9  and illustrating the connector loaded with a filler in the locked state; and 
         FIG. 14  is a cross-sectional view illustrating the connector loaded with a filler in the locked state taken along arrows XII-XII in  FIG. 8   
     
    
    
     DETAILED DESCRIPTION 
     An embodiment of this disclosure will be described below with reference to the accompanying drawings. In the following description, a front-rear direction, a right-left direction and an up-down direction are based on the directions of the arrows in the figures. 
     The configuration of a connector  10  loaded with no filler  70  will be mainly described below. 
       FIG. 1  is a perspective view of a connector  10 , a first cable  60  and a second cable  65  according to an embodiment in which an insulating housing  15  is in an expanded state.  FIG. 2  is a cross-sectional view taken along arrows II-II in  FIG. 1 . The connector  10  according to an embodiment includes an insulating housing  15  and a relay contact  50  (contact) as main elements. 
     The insulating housing  15  is obtained by, for example, molding a synthetic resin material having an insulating property. The insulating housing  15  includes a first split housing  16  (fitting object) and a second split housing  30  (fitting object). The insulating housing  15  includes a first connecting portion  46  and a second connecting portion  47  (connecting portion) acting as a coupling portion connecting the first split housing  16  and the second split housing  30 . The insulating housing  15  includes the first split housing  16  and the second split housing  30 , and the first connecting portion  46  and the second connecting portion  47 , in an integrally molded manner. 
       FIG. 3  is an enlarged perspective view illustrating the first split housing  16  alone, omitting the relay contact  50 ,  FIG. 4  is an enlarged perspective view illustrating the second split housing alone, and  FIG. 5  is a perspective view illustrating the insulating housing in its entirety, omitting the relay contact  50 . 
     The configuration of the first split housing  16  will be described in detail below with reference to  FIG. 3 . 
     An outer peripheral edge of one surface (an upper surface in  FIG. 3 ) in a thickness-direction of the first split housing  16  is formed by an outer peripheral wall  17 . In the first split housing  16 , the inside of the outer peripheral wall  17  is configured as an inner peripheral recess  17   a  recessed stepwise from the top surface of the first split housing  16 . The bottom surface of the inner peripheral recess  17   a  includes an inner peripheral first opposing surface  17   b  configured as a plane parallel to the top surface of the first split housing  16 . The central portion located on the inner peripheral side of the inner peripheral first opposing surface  17   b  is configured as a first central recess  17   c  recessed stepwise from the inner peripheral first opposing surface  17   b . The bottom surface of the first central recess  17   c  includes a first central opposing surface  17   d  configured as a plane parallel to the inner peripheral first opposing surface  17   b . The first central recess  17   c  and the first central opposing surface  17   d  constitute a contact mounting groove  18 . The contact mounting groove  18  includes a fixing portion  18   a  and a central projection  18   b , which is located at the center of the fixing portion  18   a  with respect to the right-left direction and configured to narrow the front-rear direction width of the fixing portion  18   a  while separating the fixing portion  18   a  into a pair of portions in the right-left direction. Each of the bottom surfaces of the fixing portion  18   a  (the first central opposing surface  17   d ) is provided with a positioning protrusion  18   c  having a substantially columnar shape. 
     The outer peripheral wall  17  of the first split housing  16  includes a pair of first cable mounting grooves  19  configured as cutouts linearly arranged on the front and rear sides of one of the fixing portions  18   a . The outer peripheral wall  17  of the first split housing  16  also includes a pair of second cable mounting grooves  20  configured as cutouts linearly arranged on the front and rear sides of the other fixing portion  18   a . The second cable mounting groove  20  is in parallel with the first cable mounting groove  19 . Each of the first cable mounting grooves  19  and each of the second cable mounting grooves  20  have a semi-circular shape in a plan view. On the front and rear surfaces of the outer peripheral wall  17  of the first split housing  16 , a pair of inclined surfaces  19   a  is provided inclining outward in the downward direction from the bottoms of the pair of first cable mounting grooves  19 . Similarly, on the front and rear surfaces of the outer peripheral wall  17  of the first split housing  16 , a pair of inclined surfaces  20   a  is provided inclining outward in the downward direction from the bottoms of the pair of second cable mounting grooves  20 . The front and rear surfaces of the outer peripheral wall  17  of the first split housing  16  are provided with cover portions  21  and  22 , respectively. The cover portion  21  has a flat-plate shape extending in the front direction from under the inclined surfaces  19   a  and  20   a , and the cover portion  22  has a flat-plate shape extending in the rear direction from under the inclined surfaces  19   a  and  20   a . The opposing surface  21   a  of the cover portion  21  and the opposing surface  22   a  of the cover portion  22  are flush with the bottom of the inclined surface  19   a  and the bottom of the inclined surface  20   a.    
     The right and left side surfaces of the outer peripheral wall  17  of the first split housing  16  are provided with a pair of first locking portions  25  having resiliency. A pair of recesses  25   a  is formed between each first locking portion  25  and each of the front and rear surfaces of the outer peripheral wall  17 . Each first locking portion  25  is provided with a first locking protrusion  26  configured to protrude outward from the side surface of the first split housing  16 . The first locking protrusions  26  extend in the front-rear direction. Each first locking protrusion  26  includes an inclined surface  26   a  that is inclined to the outside of the first split housing  16  in the downward direction. Each first locking portion  25  is provided with an inclined surface  26   b  that is formed on the top edge of the inner surface and inclined to the inside of the first split housing  16  in the downward direction. 
     As illustrated in  FIGS. 2 and 5 , each recess  27  is formed inside the lower edge of the first locking portion  25 . Each recess  27  is recessed stepwise from the inner peripheral first opposing surface  17   b  along the lower edge of the first locking portion  25 . Walls  28  each being adjacent to the right and the left sides of the first central recess  17   c  are provided to the center of the inner peripheral first opposing surface  17   b  in the front-rear direction. 
     The configuration of the second split housing  30  will be described in detail below with reference to  FIG. 4 . 
     An outer peripheral edge of one surface (an upper surface in  FIG. 4 ) in a thickness-direction of the second split housing  30  is formed as a protrusion by an outer peripheral wall  31 . In the second split housing  30 , the inside of the outer peripheral wall  31  is configured as an inner peripheral recess  31   a  that is recessed stepwise from the top edge of the outer peripheral wall  31 . A bottom surface of the inner peripheral recess  31   a  includes an inner peripheral second opposing surface  31   b  configured as a flat plane parallel to the top surface of the second split housing  30 . The inner peripheral second opposing surface  31   b  is provided with a cable pressing protrusion  32  that includes a pair of a first pressing groove  32   a  and a second pressing groove  32   b  having U-shapes in cross-sections arranged in the right-left direction. The cable pressing protrusion  32  includes a central protrusion  32   c  and protrusions  32   d  and  32   e  on the right side and the left side, respectively, of the central protrusion  32   c . The first pressing groove  32   a  is formed between the central protrusion  32   c  and the protrusion  32   d . The second pressing groove  32   b  is formed between the central protrusion  32   c  and the protrusion  32   e.    
     The second split housing  30  includes a cable supporting arm  35  protruding from the front surface of the second split housing  30  and a cable supporting arm  36  protruding from the rear surface. The top surface of the cable supporting arm  35  includes a first cable holding groove  35   a  and a second cable holding groove  35   b , and the top surface of the cable supporting arm  36  includes a first cable holding groove  36   a  and a second cable holding groove  36   b . The cable supporting arm  35  located on the front side is provided with a pair of protruding members  37   a  spaced apart from each other in the right-left direction in the front end portion of the first cable holding groove  35   a , and the cable supporting arm  36  located on the rear side is provided with a pair of protruding members  38   a  spaced apart from each another in the right-left direction in the rear end portion of the first cable holding groove  36   a . Similarly, the cable supporting arm  35  located on the front side is provided with a pair of protruding members  37   b  spaced apart from each other in the right-left direction in the front end portion of the second cable holding groove  35   b , and the cable supporting arm  36  located on the rear side is provided with a pair of protruding members  38   b  spaced apart from each other in the right-left direction in the rear end portion of the second cable holding groove  36   b . Each of the pair of protruding members  37   a , the pair of protruding members  38   a , the pair of protruding members  37   b  and the pair of protruding members  38   b , particularly those located on the right and left outer sides of the cable supporting arms  35  and  36 , is elastically bent in the right-left direction and the spacing from its adjacent protrusion is changeable. Each of the pair of protruding members  37   a  and  37   b  includes a pair of claws opposing each other formed at the lower front end. Also, each of the pair of protruding members  38   a  and  38   b  includes a pair of claws opposing each other formed at the lower rear end. 
     Each of the first cable holding grooves  35   a  and  36   a  and each of the second cable holding grooves  35   b  and  36   b  has a depth sufficient for insertion and retention (to accommodate) of the entire diameter of the first cable  60  and the second cable  65 . The first cable holding grooves  35   a  and  36   a  include inclined surfaces  35   e  and  36   e , respectively, which are inclined upward in the outward directions. When the first cable  60  is inserted into and held by the first cable holding grooves  35   a  and  36   a , portions of the first cable  60  corresponding to the inclined surface  35   e  of the first cable holding groove  35   a  and the inclined surface  36   e  of the first cable holding groove  36   b  are inclined obliquely in the up-down direction. Similarly, the second cable holding grooves  35   b  and  36   b  include inclined surfaces  35   f  and  36   f , respectively. The second cable  65  is inserted into and held by the second cable holding grooves  35   b  and  36   b  in a manner similar to the first cable  60 . 
     A pair of retainer protrusions  35   c  is provided to the first cable holding groove  35   a  in the vicinity of a top opening of a front end portion (on the opposing surfaces provided with the pair of protruding members  37   a ) and a pair of retainer protrusions  36   c  is provided to the first cable holding groove  36   a  in the vicinity of a top opening of a rear end portion (on the opposing surfaces provided with the pair of protruding members  38   a ). Similarly, a pair of retainer protrusions  35   d  is provided to the second cable holding groove  35   b  in the vicinity of a top opening of a front end portion (on the opposing surfaces provided with the pair of protruding members  37   b ), and a pair of retainer protrusions  36   d  is provided to the second cable holding groove  36   b  in the vicinity of a top opening of a rear end portion (on the opposing surfaces provided with the pair of protruding members  38   b ). The retainer protrusions  35   c  and  36   c  allow insertion of the first cable  60  into the first cable holding grooves  35   a  and  36   a , and the retainer protrusions  35   d  and  36   d  allow insertion of the second cable  65  into the second cable holding grooves  35   b  and  36   b . At the time of the insertion, each of the pair of protruding members  37   a , the pair of protruding members  38   a , the pair of protruding members  37   b  and the pair of protruding members  38   b  is bent such that the gaps therebetween (i.e., the gap between the pair of retainer protrusions  35   c , the gap between the pair of retainer protrusions  36   c , the gap between the pair of retainer protrusions  35   d , and the gap between the pair of retainer protrusions  36   d ) are widened in the right-left direction. 
     When the first cable  60  and the second cable  65  are inserted into the first cable holding grooves  35   a  and  36   a  and the second cable holding grooves  35   b  and  36   b , respectively, each of the pair of retainer protrusions  35   c  and the pair of retainer protrusions  36   c  clamp the first cable  60 , and each of the pair of retainer protrusions  35   d  and the pair of retainer protrusions  36   d  clamp the second cable  65 . Each of the pair of protruding members  37   a , the pair of protruding members  38   a , the pair of protruding members  37   b  and the pair of protruding members  38   b  is elastically bent in directions which narrow the space therebetween in the right-left direction. Thus, the pair of protruding members  37   a  and the pair of protruding members  38   a  allow, in a resisting manner, a cable-extending-direction movement of the first cable  60  inserted into the first cable holding grooves  35   a  and  36   a . Also, the pair of protruding members  37   b  and the pair of protruding members  38   b  allow, in a resisting manner, a cable-extending-direction movement of the second cable  65  inserted into the second cable holding grooves  35   b  and  36   b . Further, the pair of protruding members  37   a  and the pair of protruding members  38   a  function as a stopper configured to resist a force acting to remove the first cable  60  from the first cable holding grooves  35   a  and  36   a  and inhibit easy removal of the first cable  60 , and allow removal of the first cable  60  upon application of an external force of a certain strength or greater. Also, the pair of protruding members  37   b  and the pair of protruding members  38   b  function as a stopper configured to resist a force acting to remove the second cable  65  from the second cable holding grooves  35   b  and  36   b  and inhibit easy removal of the second cable  65 , and allow removal of the second cable  65  upon application of an external force of a certain strength or greater. Such retaining actions as described above are maintained even when the second split housing  30  is flipped over (interchange of inside and outside). 
     The right and left side surfaces of the outer peripheral wall  31  of the second split housing  30  include a pair of second locking portions  39 . The pair of second locking portions  39  is formed on the inner surface of the second split housing  30 . Each of the pair of second locking portions  39  includes a second locking protrusion  40  that protrudes inward from the side surface of the second split housing  30 . Each of the second locking portions  39  includes a pair of projection walls  41  extending in the up-down direction at the front and rear ends of each of the second locking portions  39 . Each of the second locking protrusions  40  has a substantially rectangular parallelepiped shape formed on the inner surface of the second split housing  30  and extends between the pair of projection walls  41 . The second locking protrusions  40  extend in the front-rear direction. 
     A wall  42  including protrusions  32   d  and  32   e  is formed around the cable pressing protrusion  32 . The wall  42  surrounds the first pressing groove  32   a , the second pressing groove  32   b  and the central protrusion  32   c . The wall  42  protrudes further to the fitting side than the positions where the protrusions  32   d  and  32   e  are formed. Notches configured to hold the first cable  60  with the first cable holding grooves  35   a  and  36   b  are formed each on the right side of the front and rear surfaces of the wall  42 . Similarly, notches configured to hold the second cable  65  with the second cable holding grooves  35   b  and  36   b  are formed each on the left side of the front and rear surfaces of the wall  42 . Recesses  43  (spaces) that are recessed stepwise inward are formed each on the outer surfaces in the right and left direction of the wall  42 . The front-rear width of the recess  43  is slightly larger than that of the wall  28  of the first split housing  16 . 
     As illustrated in  FIGS. 2 and 5 , penetrating portions  44  penetrating to the outer surface of the second split housing  30  along the up-down direction are formed each on the right and left ends of an inner peripheral second opposing surface  31   b . Each penetrating portion  44  extends in the front-rear direction with a width slightly larger than the front-rear width of the first locking portion  25  of the first split housing  16 . 
     As illustrated in  FIG. 5 , the first split housing  16  and the second split housing  30  are coupled via the pair of first connecting portions  46  that is arranged in the front-rear direction and linearly extends from the first split housing  16 , a pair of second connecting portions  47  that is arranged in the front-rear direction and linearly extends from the second split housing  30 , and a pair of fold-facilitating portions  48 . The fold-facilitating portions  48  couple the pair of first connecting portions  46  and the pair of second connecting portions  47 . The pair of first connecting portions  46  and the pair of second connecting portions  47  are flushed with each other in the expanded state. 
     As illustrated in  FIGS. 2 and 5 , the fold-facilitating portions  48  are thinner than the first connecting portion  46  and the second connecting portion  47  arranged in the front-rear direction. Each of the pair of first connecting portions  46  and the pair of second connecting portions  47  arranged in the front-rear direction can be (easily) folded at the fold-facilitating portions  48  that extend in the front-rear direction and serve as a folding line for valley-folding (i.e., in a folding manner to bring the first split housing  16  and the second split housing  30  close to each other) in  FIG. 1 ,  FIG. 5 , and the like. The pair of first connecting portions  46  has flexural rigidity smaller than that of the pair of second connecting portions  47 . 
     Each of the first split housing  16 , the pair of first connecting portions  46 , the fold-facilitating portions  48 , the pair of second connecting portions  47 , and the second split housing  30  has strength (rigidity) sufficient to autonomously maintain the expanded state illustrated in  FIGS. 1 and 5 . 
       FIG. 6  is a perspective view illustrating the relay contact  50  alone. A configuration of the relay contact  50  will be described in detail with reference to  FIG. 6 . 
     The relay contact  50  is formed by processing of a thin plate made of a copper alloy (e.g., phosphor bronze, beryllium copper, or titanium copper) or Corson copper alloy into a shape as illustrated in the figure by using a progressive die (stamping). The relay contact  50  is plated with copper-tin alloy or tin (or gold) after nickel plate undercoating. 
     The relay contact  50  includes, in an integrated manner, a base  51  that has a plate-like shape and extends in the right-left direction, a pair of first cable press-contact members  52  each having a plate-like shape that protrudes from the front and rear edges on one side of the base  51  and extends in a direction perpendicular to the base  51 , and a pair of second cable press-contact members  54  each having a plate-like shape that protrudes from the front and rear edges on the other side of the base  51  and extends in a direction perpendicular to the base  51 . The base  51  includes a pair of positioning holes  51   a  having a circular shape in the right and left portions of the base  51 . Each of the pair of first cable press-contact members  52  and each of the pair of second cable press-contact members  54  arranged in the front-rear direction includes a first press-contact groove  53  and a second press-contact groove  55 , respectively, configured as slits linearly extending toward the base  51 . Each of the pair of first press-contact grooves  53  includes, at the top opening thereof, a top end portion  52   a  having a substantially V-shape opening upward. Each of the pair of second press-contact grooves  55  includes, at the top opening thereof, a top end portion  54   a  having a substantially V-shape opening upward. 
     The pair of first cable press-contact members  52  and the pair of second cable press-contact members  54  arranged in the front-rear direction are coupled to the base  51  via narrow portions (neck portions)  52   b  and  54   b , respectively. The spaces between the opposing edges of the pair of first cable press-contact members  52  and the pair of second cable press-contact members  54  arranged in the right-left direction are narrower than the spaces between the opposing edges of the narrow portions  52   b  and the narrow portions  54   b . A space  51   b  is formed between the narrow portion  52   b  and the narrow portion  54   b . No other members, such as an insulator, are provided between the pair of first cable press-contact members  52  and the pair of second cable press-contact members  54 . 
     The relay contact  50  is included with electrically connected with the first cable  60  and the second cable  65  in a state in which the first split housing  16  and the second split housing  30  are fitted to each other. More specifically, when the first split housing  16  and the second split housing  30  are fitted to each other, the relay contact  50  cuts insulating sheaths  62  and  67  by a first press-contact groove  53  and a second press-contact groove  55 , respectively, to allow the first cable  60  and the second cable  65  to be electrically connected to each other. When fitted to each other, the relay contact  50  allows the first press-contact groove  53  and the second press-contact groove  55  to clamp a core wire  61  and a core wire  66 , respectively, to allow the first cable  60  and the second cable  65  to be electrically connected to each other. 
     The first cable  60  and the second cable  65  are respectively formed from core wires  61  and  66  (stranded wires or a single wire) made of a material (e.g., copper or aluminum) that has conductivity and flexibility, the core wires are respectively covered by sheaths  62  and  67  formed into a tubular shape and having flexibility and insulating properties. The first cable  60  is a cable originally provided in a wiring object (e.g., an automobile or the like) and configured to be connected to a power source of the wiring object. The second cable  65  is a cable additionally connected to the first cable  60 . A (front) end of the second cable  65  is connected to an electronic device or an electrical device (e.g., a car navigation system). 
       FIG. 7  is a perspective view illustrating the connector  10 , the first cable  60  and the second cable  65  in transition of the insulating housing  15  from the expanded state to a locked state.  FIG. 8  is a perspective view illustrating the connector  10 , the first cable  60  and the second cable  65  when the insulating housing  15  is in the locked state.  FIG. 9  is a cross-sectional view taken along arrows IX-IX in  FIG. 8 . 
     In order to assemble the connector  10  by integrating the insulating housing  15 , the relay contact  50 , the first cable  60  and the second cable  65  and electrically connecting the first cable  60  and the second cable  65 , an assembling operator manually fits the lower portion of the relay contact  50  into the contact mounting groove  18  of the first split housing  16  in the expanded state illustrated in  FIGS. 1 and 5 . In particular, the base  51  is fitted to the bottom portion of the contact mounting groove  18  in such a manner that the space  51   b  accommodates the central projection  18   b . Each of the half portions of the first cable press-contact members  52  close to the base  51  (the lower portions in  FIG. 1  and  FIG. 2 ) is fitted to a corresponding portion of the fixing portion  18   a . Each of the half portions of the second cable press-contact members  54  close to the base  51  is fitted to a corresponding portion of the fixing portion  18   a . Because the pair of positioning protrusions  18   c  of the first split housing  16  is fitted into the pair of positioning holes  51   a  of the base  51  (see  FIG. 2  and  FIG. 9 ), the relay contact  50  is positioned relative to the first split housing  16 . When the relay contact  50  is mounted in the first split housing  16 , the first press-contact grooves  53  arranged in the front-rear direction are located on the axis extending through the pair of first cable mounting grooves  19  arranged in the front-rear direction, and the second press-contact grooves  55  arranged in the front-rear direction are located on the axis extending through the pair of second cable mounting grooves  20  arranged in the front-rear direction. 
     The assembling operator manually pushes the first cable  60  and the second cable  65  in a manner overcoming the resistance of the retainer protrusions  35   c  and  36   c  arranged in the front-rear direction and the retainer projections  35   d  and  36   d  arranged in the front-rear direction (see  FIG. 1 ). At the time of insertion, the pair of protruding members  37   a , the pair of protruding members  38   a , the pair of protruding members  37   b  and the pair of protruding members  38   b  are bent against the elastic force in such a manner as to widen the space between the pair of retainer protrusions  35   c , the space between the pair of retainer protrusions  36   c , the space between the pair of retainer protrusions  35   d  and the space between the pair of retainer protrusions  36   d , respectively. When the first cable  60  and second cable  65  are pushed into the first cable holding grooves  35   a  and  36   a  and the second cable holding grooves  35   b  and  36   b , respectively, the space between the retainer protrusions  35   c , the space between the retainer protrusions  36   c , the space between the retainer protrusions  35   d , and the space between the retainer protrusions  36   d  are narrowed. In this manner, the first cable  60  is clamped between the bottom of the first cable holding grooves  35   a  and  36   a  and the retainer protrusions  35   c  and  36   c , and the second cable  65  is clamped between the bottom of the second cable holding grooves  35   b  and  36   b  and the retainer protrusions  35   d  and  36   d . This enables the first cable  60  and the second cable  65  to move in the cable extending direction in a resisting manner. Thus, positions of the first cable  60  and the second cable  65  can be adjusted in the extending directions thereof relative to the connector  10  in the expanded state illustrated in  FIG. 1  and  FIG. 2 . Upon application of a force acting to remove the first cable  60  from the first cable holding grooves  35   a  and  36   a  or a force acting to remove the second cable  65  from the second cable holding grooves  35   b  and  36   b , the corresponding one of first cable  60  and the second cable  65  receives a resisting force inhibiting the removal thereof. Therefore, even when the connector  10  is flipped upside down, the first cable  60  and the second cable  65  do not easily fall out of the first cable holding grooves  35   a  and  36   a  and the second cable holding grooves  35   b  and  36   b , respectively. The first cable  60  and the second cable  65  can be removed from the first cable holding grooves  35   a  and  36   a  and the second cable holding grooves  35   b  and  36   b , respectively, upon application of an urging force of a certain strength or greater. This facilitates replacement of the connector  10  and changes of the first cable  60  and the second cable  65  to be mounted in or dismounted from the connector  10 . 
     In a state in which the first cable  60  and the second cable  65  are arranged in the right-left direction and fitted to the first cable holding grooves  35   a  and  36   a  and the second holding grooves  35   b  and  36   b , respectively, the second split housing  30  (the pair of second connecting portions  47  arranged in the front-rear direction) is rotated toward the first split housing  16  (the pair of first connecting portions  46  arranged in the front-rear direction) in a manner pivoting around the fold-facilitating portions  48  arranged in the front-rear direction. This causes each of the second locking protrusions  40  of the first split housing  16  to contact a corresponding one of the inclined surfaces  26   a  of the first locking protrusions  26 . When the second split housing  30  is further rotated, each of the second locking protrusions  40  slides downward on a corresponding one of the inclined surfaces  26   a , and the first locking protrusions  26  are elastically deformed inward into the first split housing  16 . The second pressing groove  32   b  of the cable pressing protrusion  32  located on the side close to the second connecting portion  47  slightly pushes the central portion of the second cable  65  toward the bottom (in the downward direction) of the second press-contact groove  55 . This moves the central portion of the second cable  65  into the space between each of the pair of second cable press-contact members  54  arranged in the front-rear direction. 
     The assembling operator manually rotates the second split housing  30  further toward the first split housing  16  in a manner pivoting around the fold-facilitating portions  48  arranged in the front-rear direction. The first pressing groove  32   a  of the cable pressing protrusion  23  located on a side remote from the second connecting portions  47  pushes the central portion of the first cable  60  against the top end portions  52   a  of the first cable press-contact members  52  in the extending direction of the first press-contact grooves  53  or in a direction close thereto. In this manner, the first cable  60  is clamped by the top end portions  52   a  and the cable pressing protrusion  32 . 
     After the first cable  60  and the second cable  65  are placed on the top end portion  52   a  and the top end portion  54   a , respectively, of the relay contact  50 , the first split housing  16  and the second split housing  30  are pushed together in substantially parallel directions bringing them close to each other by a generic tool (e.g., pliers), which is not illustrated. Each of the second locking protrusions  40  is engaged with a corresponding one of the first locking protrusions  26 . Each of the projection walls  41  of the second locking portion  39  is fitted into a corresponding one of the recesses  25   a . In this manner, the first split housing  16  is accommodated in the second split housing  30 , and the first locking portions  25  and the second locking portions  39  are engaged with each other inside the first split housing  16  and the second split housing  30  fitted to each other. 
     The cable pressing protrusion  32  further pushes the central portions of the first cable  60  and the second cable  65  deep into (toward the bottoms of) the first press-contact groove  53  and the second press-contact groove  55 , respectively. This moves the first cable  60  substantially to the central portions of the first press-contact grooves  53  from the top end portions  52   a , and the second cable  65  substantially to the central portions of the second press-contact grooves  55  from the top end portions  54   a . At this time, the first cable  60  and the second cable  65  are pressed by the first pressing groove  32   a  and the second pressing groove  32   b , respectively, of the cable pressing protrusion  32  in directions substantially parallel to each other in the up-down direction (i.e., the extending directions of the first press-contact groove  53  and the second press-contact groove  55 ). Thus, the inner surfaces (right and left surfaces) of the first press-contact groove  53  cut through the right and left side portions of the sheath  62  of the first cable  60 , and the inner surfaces (right and left surfaces) of the second press-contact grooves  55  cut through the right and left side portions of the sheath  67  of the second cable  65 . In this manner, when the insulating housing  15  is held in a closed state, the inner surfaces (a pair of surfaces opposing each other) of the first press-contact grooves  53  evenly and reliably contact (press contact) both side portions of the core wire  61 . Also, the inner surfaces (a pair of surfaces opposing each other) of the second press-contact grooves  55  evenly and reliably contact (clamp) both side portions of the core wire  66 . Consequently, the core wire  61  of the first cable  60  and the core wire  66  of the second cable  65  are electrically connected to each other via the relay contact  50  within the connector  10 . 
     Because the side portions of the core wire  61  and the side portions of the core wire  66  are not clamped in an excessively strong manner by the inner surfaces of the first press-contact grooves  53  and the inner surfaces of the second press-contact grooves  55 , respectively, parts of the core wire  61  and the core wire  66  are not cut by the first press-contact grooves  53  and the second press-contact grooves  55 , respectively. Thus, the core wires  61  and  66  maintain the respective mechanical strengths, thereby reducing the likelihood that the core wires  61  and  66  are completely severed by tensile forces applied to the first cable  60  and the second cable  65 . Thus reliable contact between each of the first cable  60  and the second cable  65  and the relay contact  50  can be improved. 
     In a state in which the first split housing  16  and the second split housing  30  are closed (fitted to each other) and held (locked), the opposing surface  21   a  of the cover portion  21  of the first split housing  16  partially closes the openings (the top openings in  FIG. 4 ) of the first cable holding groove  35   a  and the second cable holding groove  35   b , and the opposing surface  22   a  of the cover portion  22  of the first split housing  16  partially closes the openings of the first cable holding groove  36   a  and the second cable holding groove  36   b . The first cable  60  is clamped in the up-down direction by the pair of inclined surfaces  19   a  of the first split housing  16  and the corresponding inclined surfaces  35   e  and  36   e  of the second split housing  30 . The second cable  65  is clamped in the up-down direction by the pair of inclined surfaces  20   a  of the first split housing  16  and the corresponding inclined surfaces  35   f  and  36   f  of the second split housing  30 . 
     Hereinafter, the connector  10  in a state loaded with fillers  70  will be mainly described. The fillers  70  (a first filler  70   a  and a second filler  70   b ) are provided in the first split housing  16  and the second split housing  30 , respectively. The first filler  70   a  and the second filler  70   b  may be combined together or may be stuck to each other to form a bonded surface when the first split housing  16  and the second split housing  30  are fitted to each other. The fillers  70  may be any appropriate material including a waterproof gel, a UV curing resin, or an adhesive that has a combining property or a sticking property. 
       FIG. 10  is a perspective view illustrating the insulating housing  15  loaded with fillers  70  in the expanded state.  FIG. 11  is a cross-sectional view corresponding go  FIG. 9  and illustrating the insulating housing  15  loaded with fillers  70  in transition from the expanded state to the locked state.  FIG. 12  is a cross-sectional view illustrating the insulating housing  15  loaded with fillers  70  in transition from the expanded state to the locked state taken along arrows XII-XII in  FIG. 8 .  FIG. 13  is a cross-sectional view corresponding to  FIG. 9  and illustrating the connector  10  loaded with fillers  70  in the locked state, and  FIG. 14  is a cross-sectional view taken along arrows XII-XII in  FIG. 8  illustrating the connector  10  loaded with fillers  70  in the locked state. 
     In an embodiment, the fillers  70  are placed on the inner peripheral first opposing surface  17   b  of the first split housing  16  and the inner peripheral second opposing surface  31   b  of the second split housing  30 , as illustrated in  FIG. 10 . 
     The first filler  70   a  placed on the inner peripheral first opposing surface  17   b  of the first split housing  16  includes a bottom surface having a planar shape in substantial conformance with the inner peripheral first opposing surface  17   b , and is formed such that it surrounds the relay contact  50 . In this context, each wall  28  is disposed such that it is sandwiched between the relay contact  50  and the first filler  70   a . The height of the first filler  70   a  is determined such that the first filler  70   a  and the second filler  70   b  are combined or stuck to each other when the first split housing  16  and the second split housing  30  are fitted to each other. 
     The second filler  70   b  placed on the inner peripheral second opposing surface  31   b  of the second split housing  30  includes a bottom surface having a planar shape in substantial conformance with the inner peripheral second opposing surface  31   b , and is formed such that it surrounds the cable pressing protrusion  32 . In this context, the wall  42  separates the first pressing groove  32   a , the second pressing groove  32   b  and the central protrusion  32   c  from the second filler  70   b . The wall  42  is disposed along the inner peripheral surface of the second filler  70   b  that surrounds the cable pressing protrusion  32 . The wall  42  protrudes to the fitting side, that is, protrudes upward beyond the second filler  70   b . The protrusions  32   d  and  32   e  are formed such that they protrude one step above the other portions of the wall  42 . The height of the second filler  70   b  is determined such that the first filler  70   a  and the second filler  70   b  are combined or stuck to each other when the first split housing  16  and the second split housing  30  are fitted to each other. 
     When the connector  10  is transitioned to the locked state from the expanded state illustrated in  FIG. 10 , the entire interior of the first split housing  16  and the entire interior of the second split housing  30  fitted to each other are loaded with the fillers  70  as illustrated in  FIGS. 13 and 14  after the state illustrated in  FIGS. 11 and 12 . In particular, when the first split housing  16  and the second split housing  30  are brought into the locked state, the fillers  70  closely contact the inner peripheral first opposing surface  17   b  and the inner peripheral second opposing surface  31   b  and surround the relay contact  50 . 
     In the locked state, the first filler  70   a  and the second filler  70   b  are crushed to each other and are brought into a compressed state once, thus are closely contact to each other. In this context, when the fillers  70  are made of a material having a combining property, the first filler  70   a  and the second filler  70   b  are integrated through chemical reaction such as hydrogen bonding. When the fillers  70  are made of a material having a sticking property, the first filler  70   a  and the second filler  70   b  form a bonding surface such that they are stuck to each other. In this manner, the fillers  70  seal around the relay contact  50 . 
     In this context, the wall  42  separates the relay contact  50  and the fillers  70 . In other words, the wall  42  is disposed between the relay contact  50  and the fillers  70 . The wall  42  is disposed along the inner peripheral surface of the fillers  70  that surrounds the relay contact  50  in a fitted state. The outer surface of the wall  42  faces the inner peripheral surface of the fillers  70 . The outer surface of the wall  42  may come in contact with the inner peripheral surface of the fillers  70  (see  FIG. 14 ). The wall  28  overlaps with the wall  42  in the right-left direction (see  FIG. 13 ). The wall  28  and the wall  42  form a double structure after the fitting objects are fitted to each other. More specifically, the wall  28  is adjacent to the wall  42  in the direction perpendicular to the fitting direction, that is, along the right-left direction. 
     Each of the first split housing  16  and the second split housing  30  includes spaces S for accommodating excessive portions of the filler  70 . The spaces S may be formed as three portions. The space S may be formed as a recess  43  provided in the outer surface of the wall  42  that faces the filler  70  (see  FIG. 13 ). The space S may be formed as a penetrating portion  44  that penetrates the second split housing  30  in the fitting direction, that is, along the up-down direction (see  FIGS. 13 and 14 ). The space S may be a recess  27  provided in a position that faces the penetrating portion  44  across the filler  70  after the fitting objects are fitted to each other. In this manner, penetrating portions  44  and recesses  27  are formed each along each of the pair of first locking portions  25  and are provided above and below the filler  70 , respectively, when the first split housing  16  and the second split housing  30  are fitted to each other. 
     The first cable  60  and the second cable  65  extend outward from the relay contact  50  disposed inside the filler  70  in the locked state. The first cable  60  and the second cable  65  extend outward from the press-contact portion of the relay contact  50  along the front-rear direction. 
     The fillers  70  come in contact with the inner surfaces of the pair of first locking portions  25  of the first split housing  16 . As illustrated in  FIG. 13 , each of the engaging surfaces  29  between the first locking protrusion  26  and the second locking protrusion  40  is located, with respect to the up-down direction thereof, within the width of the fillers  70  along the up-down direction. When the first split housing  16  and the second split housing  30  are fitted to each other, the surface of each second locking protrusion  40  comes in contact with the outer surface of each first locking portion  25 . Each of abutment surfaces  45  thus formed is substantially parallel to the inner surface of the first locking portion  25  being in contact with the fillers  70 . 
     With the fillers  70  configured in the above described manner, the connector  10  can effectively prevent foreign matter such as water or dust from entering from outside. 
     In the connector  10  according to an embodiment described above, the wall  42  prevents the fillers  70  compressed when fitted to each other from entering to the inside, which enhances the waterproof performance of the connector  10  without reducing the pressure of the contact surface between the fillers  70  in a fitted state. In the connector  10 , entering of the fillers  70  into the relay contact  50  can be prevented after the fitting objects are fitted to each other, which enables the connector  10  to prevent poor contact of the relay contact  50  with core wires  61  and  66  of each cable. 
     In the connector  10 , the wall  42  is disposed along the inner peripheral surface of the fillers  70 , and thus the fillers  70  that surround the relay contact  50  are effectively prevented from entering thereto in all directions. In this manner the connector  10  produces the above-described related effects more prominently. 
     In the connector  10 , a double structure formed by the wall  28  and the wall  42  enables corresponding portions to improve robustness as a wall. In this manner, in the connector  10 , damage to the wall  28  and the wall  42  can be prevented even if a pressure toward the inside is applied when the fillers  70  are compressed. 
     As illustrated in  FIG. 11 , in the connector  10 , the wall  42  largely protrudes to the fitting side beyond the second filler  70   b , and thus the second filler  70   b  can be separated from the space inside before the first filler  70   a  and the second filler  70   b  come in contact to each other. In this manner, in the connector  10 , the fillers  70  in a compressed state can be effectively prevented from entering to the inside at corresponding portions even in the middle of a fitting process. As illustrated in  FIG. 12 , the wall  42  protrudes to the fitting side beyond the second filler  70   b , which enables the connector  10  to guide the first filler  70   a  in the first split housing  16  to the outside to allow the first filler  70   a  and the second filler  70   b  to be brought in contact with the filler  70  on the outside of the wall  42 . 
     The connector  10  includes spaces S. The spaces allow the excessive portions of the fillers  70  to be absorbed and stored therein when fitted to each other. Therefore, the connector  10  can adjust the compressibility of the fillers  70  when fitted to each other. In other words, the connector  10  can reduce a difference in compressibility between the fillers  70 . In the connector  10 , spaces S are provided purposely at predetermined positions, which can prevent excessive portions of the fillers  70  from being spread to unintentional positions. In this manner, the connector  10  can suppress a decline of the fitting force and the pressure of the contact surface. The connector  10  can prevent the waterproof performance from being deteriorated. In this manner, in the connector  10 , excessive portions of the fillers  70  do not influence the waterproof performance. In the connector  10 , the fillers  70  can be prevented effectively from being entering into the relay contact  50  owing to the synergy between the wall  42  and the space S. 
     In the connector  10 , the space S is formed by a recess  43 , and thus can store therein the excessive portion of the filler  70  that is compressed and pushed out to the inside. 
     In the connector  10 , the space S is formed by a penetrating portion  44 , and thus can store therein the excessive portion of the fillers  70  that is compressed and pushed out to the outside. In the connector  10 , the penetrating portion  44  penetrates upward, which allows the excessive portion of the filler  70  to be escaped to the outside. In the connector  10 , the fillers  70  can be seen from the penetrating portion  44 , which allows for easy visual confirmation of the volume of the fillers  70 . Therefore, in the connector  10 , the volume of the fillers  70  can be appropriately adjusted when manufacturing, which contributes to improvement of productivity. 
     In the connector  10 , the space S is formed by a recess  27 , and thus can store therein the excessive portion of the fillers  70  that is compressed and pushed out to the outside. In the connector  10 , the excessive portion to be pushed out to the outside can be stored more effectively due to synergies between the recess  27  and the penetrating portion  44 . 
     In the connector  10 , the relay contact  50  is included with electrically connected with the cable, and thus the first cable  60  and the second cable  65  can be connected to each other in safety. In this manner, the reliability of the connector  10  as a product can be improved. 
     In the connector  10 , cables extend to the outside from the relay contact  50  disposed inside the fillers  70 , which allows the cables to be connected to other electronic devices while portions in contact with the relay contact  50  are protected from external foreign matters. 
     In the connector  10 , the core wires  61  and  66  of the first cable  60  and the second cable  65  are clamped by the first press-contact groove  53  and the second press-contact groove  55 , respectively, and are electrically connected. Thus the contact reliability thereof can be improved. In this manner, the connector  10  ensures electrical connection of the first cable  60  and the second cable  65 . 
     It will be apparent to those skilled in the art that this disclosure can be realized in forms other than the embodiment described above, without departing from the spirit and the fundamental characteristics of the disclosure. Accordingly, the above described description is merely illustrative and not limiting in any manner. The scope of this disclosure is defined by the appended claims, not by the above described description. Among all modifications, those within a range of the equivalent to this disclosure shall be considered as being included in this disclosure. 
     In the above description, the relay contact  50  is mounted to the first split housing  16 , but is not limited thereto, and the relay contact  50  may be mounted to the second split housing  30  or to both of the first split housing  16  and the second split housing  30 . 
     In the above description, the first split housing  16  and the second split housing  30  are loaded with the first filler  70   a  and the second filler  70   b , respectively, but is not limited thereto, and the connector  10  may be configured such that only one of the first split housing  16  and the second split housing  30  is loaded with a filler  70  as long as the connector  10  can obtain an appropriate waterproof property. 
     In the above description, the first split housing  16  includes the wall  28  and the second split housing  30  includes the wall  42 , but is not limited thereto, and only one of the first split housing  16  and the second split housing  30  may have a configuration that corresponds to a wall. The wall  28  and the wall  42  may be exchanged, and the first split housing  16  may include the wall  42  and the second split housing  30  may include the wall  28 . In this case, for example, the wall  42  may separate the first filler  70   a  and the relay contact  50  before the fitting objects are fitted to each other. Moreover, the wall  42  may be disposed along the inner peripheral surface of the first filler  70   a  that surrounds the relay contact  50  before the fitting objects are fitted to each other. This allows the connector  10  to produce the above described effects. In the above description, the wall  28  is formed at only a part around the relay contact  50  and a double structure is formed only by corresponding portions after the fitting objects are fitted to each other, but is not limited thereto. The wall  28  may be formed such that it surrounds the relay contact  50 , and the wall  28  may form a double structure with the wall  42  all around the relay contact  50  after the fitting objects are fitted to each other. The wall  28  and the wall  42  may be formed into a shape tapered toward the fitting side to improve the guiding performance with respect to the corresponding filler  70 . 
     In the above description, the wall  42  is disposed along the inner peripheral surface of the filler  70  that surrounds the relay contact  50  when fitted to each other, but is not limited thereto, and the wall  42  may be appropriately formed into a shape that corresponds to the way the fillers  70  are disposed inside the first split housing  16  and the second split housing  30 . 
     The connector  10  may not include a space S as long as appropriate amounts of fillers  70  are precisely loaded therein and an excessive portion thereof does not occur. 
     In the above description, the space S is formed by a recess  43 , a penetrating portion  44  and a recess  27 , but is not limited thereto, and the space S may be formed into any manner as long as it accommodates an excessive portion of the fillers  70  and contributes to suppress degradation of the waterproof performance. 
     Although the relay contact  50  is configured to clamp the second cable  65 , the relay contact  50  may be configured to crimp the second cable  65 . In this case, the second cable  65  is connected in a crimped manner to the relay contact  50  in advance and, in this state, the relay contact  50  is mounted in the first split housing  16 . In this embodiment, cable crimp terminals are formed in place of one of the pair of first press-contact grooves  53  and the pair of second press-contact grooves  55  of the relay contact  50 . The second split housing  30  is provided with the cable supporting arm  35  or  36  corresponding to the remaining one of the press-contact grooves. 
     On the contrary, the connector  10  may connect three or more cables that are arranged in a direction orthogonal to or substantially orthogonal to the extending direction of the portions of the cables supported by the connector  10 . In this case, a relay contact may include a set of three or more press-contact grooves (arranged in the right-left direction). A plurality of relay contacts may include the respective press-contact grooves, and at least one of the relay contacts includes two or more pairs of press-contact grooves, each of which is configured to clamp a cable (core wire). 
     REFERENCE SIGNS LIST 
     
         
         
           
               10  Connector 
               15  Insulating housing 
               16  First split housing (fitting object) 
               17  Outer peripheral wall 
               17   a  Inner peripheral recess 
               17   b  Inner peripheral first opposing surface 
               17   c  First central recess 
               17   d  First central opposing surface 
               18  Contact mounting groove 
               18   a  Fixing portion 
               18   b  Central projection 
               18   c  Positioning protrusion 
               19  First cable mounting groove 
               19   a  Inclined surface 
               20  Second cable mounting groove 
               20   a  Inclined surface 
               21 ,  22  Cover portion 
               21   a ,  22   a  Opposing surface 
               25  First locking portion 
               25   a  Recess 
               26  First locking protrusion 
               26   a ,  26   b  Inclined surface 
               27  Recess (space) 
               28  Wall 
               29  Engaging surface 
               30  Second split housing (fitting object) 
               31  Outer peripheral wall 
               31   a  Inner peripheral recess 
               31   b  Inner peripheral second opposing surface 
               32  Cable pressing protrusion 
               32   a  First pressing groove 
               32   b  Second pressing groove 
               32   c  Central protrusion 
               32   d ,  32   e  Protrusion 
               35 ,  36  Cable supporting arm 
               35   a ,  36   a  First cable holding groove 
               35   b ,  36   b  Second cable holding groove 
               35   c ,  36   c  Retainer protrusion 
               35   d ,  36   d  Retainer protrusion 
               35   e ,  36   e  Inclined surface 
               35   f ,  36   f  Inclined surface 
               37   a ,  37   b ,  38   a ,  38   b  Protruding member 
               39  Second locking portion 
               40  Second locking protrusion 
               41  Projection wall 
               42  Wall 
               43  Recess (space) 
               44  Penetrating portion (space) 
               45  Abutment surface 
               46  First connecting portion (connecting portion) 
               47  Second connecting portion (connecting portion) 
               48  Fold-facilitating portion 
               50  Relay contact (contact) 
               51  Base 
               51   a  Positioning hole 
               51   b  Space 
               52  First cable press-contact member 
               52   a  Top end portion 
               52   b  Narrow portion 
               53  First press-contact groove (press-contact groove) 
               54  Second cable press-contact member 
               54   a  Top end portion 
               54   b  Narrow portion 
               55  Second press-contact groove (press-contact groove) 
               60  First cable (cable) 
               61  Core wire 
               62  Sheath 
               65  Second cable (cable) 
               66  Core wire 
               67  Sheath 
               70  Filler 
               70   a  First filler 
               70   b  Second filler 
             S Space