Patent Publication Number: US-2022239026-A1

Title: Connector and electronic device

Description:
TECHNICAL FIELD 
     The present invention relates to a connector and an electronic device. 
     BACKGROUND ART 
     Connectors for connecting two substrates to each other have been known. A connector attached to one substrate mates with a connector attached to the other substrate. However, the relative positions of the two connectors may differ from the relative positions designed. In such a case, the two connectors may fail to mate properly. In view of this, a floating connector is known that can properly mate with another connector even when these two connectors are misaligned. An example of the floating connector is described in Patent Document 1. The connector disclosed in Patent Document 1 has a contact provided with a slit for improving flexibility and adjusting characteristic impedance. 
     CITATION LIST 
     Patent Literature 
     Patent Document 1: JP 2012-129109 A 
     SUMMARY OF INVENTION 
     A connector of one aspect includes a fixed insulator, a movable insulator that is disposed on an inner side of the fixed insulator and is movable relative to the fixed insulator, and a plurality of contacts attached to the fixed insulator and the movable insulator. The fixed insulator includes a plurality of first fixing grooves disposed along an arrangement direction in which the plurality of contacts are arranged, and partition walls each disposed between two corresponding adjacent ones of the contacts. The movable insulator includes a plurality of second fixing grooves disposed along the arrangement direction. The contacts each include a first base portion supported by a corresponding one of the first fixing grooves, a second base portion supported by a corresponding one of the second fixing grooves, a first arm portion connected to the first base portion and disposed between two corresponding adjacent ones of the partition walls, and a second arm portion connected to the first arm portion and the second base portion. A largest width of the first arm portion is smaller than a largest width of the second arm portion. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view of a connector and another connector of an embodiment after mating. 
         FIG. 2  is a plan view of the connector and the other connector of the embodiment after the mating. 
         FIG. 3  is a cross-sectional view taken along line A-A in  FIG. 2 . 
         FIG. 4  is a cross-sectional view of the connector and the other connector of the embodiment before the mating. 
         FIG. 5  is a perspective view of an electronic device provided with the connector of the embodiment. 
         FIG. 6  is a perspective view of the connector of the embodiment. 
         FIG. 7  is a plan view of the connector of the embodiment. 
         FIG. 8  is a bottom view of the connector of the embodiment. 
         FIG. 9  is an exploded perspective view of the connector of the embodiment. 
         FIG. 10  is a perspective view of the other connector. 
         FIG. 11  is a plan view of the other connector. 
         FIG. 12  is a cross-sectional view taken along line B-B in  FIG. 7 . 
         FIG. 13  is a perspective view of the cross section taken along line B-B in  FIG. 7 . 
         FIG. 14  is a side view of the contact of the embodiment. 
         FIG. 15  is a schematic view of a connector of Comparative Example. 
         FIG. 16  is a graph illustrating differential impedance of the connector of the embodiment and the connector of Comparative Example. 
         FIG. 17  is a side view of a contact of a first modified example. 
         FIG. 18  is a side view of a contact of a second modified example. 
         FIG. 19  is a side view of a contact of a third modified example. 
         FIG. 20  is a perspective view of a contact of a fourth modified example. 
         FIG. 21  is a cross-sectional view of the connector of the embodiment and another connector of a fifth modified example after the mating. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Below, an embodiment of a connector according to the present disclosure will be described with reference to the drawings. Note that the embodiment described below is not intended to limit the present invention. Furthermore, constituent elements in the embodiment described below include those that can be easily replaced by a person skilled in the art and include those that are substantially identical. 
     Embodiment 
       FIG. 1  is a perspective view of a connector and another connector of an embodiment after mating.  FIG. 2  is a plan view of the connector and the other connector of the embodiment after the mating.  FIG. 3  is a cross-sectional view taken along line A-A in  FIG. 2 .  FIG. 4  is a cross-sectional view of the connector and the other connector of the embodiment before the mating.  FIG. 5  is a perspective view of an electronic device provided with the connector of the embodiment.  FIG. 6  is a perspective view of the connector of the embodiment.  FIG. 7  is a plan view of the connector of the embodiment.  FIG. 8  is a bottom view of the connector of the embodiment.  FIG. 9  is an exploded perspective view of the connector of the embodiment.  FIG. 10  is a perspective view of the other connector.  FIG. 11  is a plan view of the other connector.  FIG. 12  is a cross-sectional view taken along line B-B in  FIG. 7 .  FIG. 13  is a perspective view of the cross section taken along line B-B in  FIG. 7 .  FIG. 14  is a side view of the contact of the embodiment. 
     An XYZ Cartesian coordinate system is used in the following description. The X axis is an axis parallel to the direction in which a plurality of contacts  30  are arranged. The Z axis is an axis parallel to the direction (mating direction) of the relative movement when the connector  100  and the connector  200  mate with each other. The Y axis is an axis orthogonal to both the X axis and the Z axis. The XY plane is parallel to a substrate  300  and a substrate  400 . The Z axis is orthogonal to the substrate  300  and the substrate  400 . A direction extending along the X axis is referred to as an X direction. A direction extending along the Y axis is referred to as a Y direction. A direction extending along the Z axis is referred to as a Z direction. Of the Z direction, a direction from the substrate  300  toward the substrate  400  is referred to as a +Z direction, and a direction opposite to the +Z direction is referred to as a −Z direction. An XY-plan view means a view in the mating direction. A YZ-plan view means a view in an arrangement direction. 
     The X direction is a direction in which the plurality of contacts  30  are arranged. The X direction is an arrangement direction in which the plurality of contacts  30  are arranged. The X direction can also be regarded as a long side direction of a fixed insulator  10  in plan view orthogonal to the substrate  300  and the substrate  400 . The Y direction is a direction orthogonal to the substrate  300  and the substrate  400  and orthogonal to the direction in which the plurality of contacts  30  are arranged. The Y direction can also be regarded as a short side direction of the fixed insulator  10  in plan view orthogonal to the substrate  300  and the substrate  400 . The Z direction is the direction (mating direction) of the relative movement when the connector  100  and the connector  200  mate with each other. The Z direction can also be regarded as a direction orthogonal to the substrate  300  and the substrate  400 . 
     As illustrated in  FIG. 1 , the connector  100  of the embodiment is attached to the substrate  300 . The connector  100  is connected with the other connector  200 . The connector  200  is attached to the substrate  400 . The substrate  300  and the substrate  400  are connected to each other via the connector  100  and the connector  200 . The substrate  300  and the substrate  400  are printed circuit boards (PCBs) and include a plurality of electronic components. Note that the substrate  300  and the substrate  400  may be flexible printed circuits (FPCs). 
     An electronic device  1000  illustrated in  FIG. 5  includes a connector  100  and a connector  200 . The electronic device  1000  is an in-vehicle camera. The electronic device  1000  includes a lens unit  1001  including a lens, and an electric wire unit  1002  including an electric wire. The connector  100  provided to one of the lens unit  1001  and the electric wire unit  1002  is connected to the connector  200  provided to the other one thereof. Note that the electronic device to which the connector  100  and the connector  200  are applied may not necessarily be an in-vehicle camera, and is not particularly limited. 
     As illustrated in  FIG. 1 , the connector  100  includes the fixed insulator  10 , a fixture  40 , a movable insulator  20 , and the plurality of contacts  30 . The connector  200  includes an insulator  60 , a fixture  80 , and a plurality of contacts  70 . 
     The contacts  30  are fixed to the substrate  300  by soldering or the like. The plurality of contacts  30  are positioned by the fixed insulator  10  and the movable insulator  20 . The plurality of contacts  30  are arranged along one direction (the X direction). The contacts  70  are fixed to the substrate  400  by soldering or the like. The plurality of contacts  70  are positioned by the insulator  60 . The plurality of contacts  70  are arranged along one direction (the X direction). When the contacts  70  come into contact with the contacts  30 , the substrate  300  and the substrate  400  are electrically connected to each other. 
     When the connector  100  and the connector  200  mate with each other, there is a possibility of misalignment with each other. In such a case, force is applied from the connector  200  to the movable insulator  20  that mates with the connector  200 . At the same time, the contacts  30  supported by the movable insulator  20  are pushed to a certain degree by the contacts  70  supported by the insulator  60 . Thus, when force is indirectly applied to a contact portion between the contacts  30  and the substrate  300 , the contact portion between the contacts  30  and the substrate  300  might become damaged. In the connector  100  of the present embodiment, due to an elastic portion of the contacts  30 , the movable insulator  20  supporting the contacts  30  moves relative to the fixed insulator  10 . As a result, the force generated in the contact portion between the contacts  30  and the substrate  300  is suppressed. Furthermore, by the misalignment during the mating of the connector  100  and the connector  200  being absorbed, workability can be improved. Such a connector  100  is known as a floating connector. 
     The insulator  60  is a member formed of an insulating material. The insulator  60  is formed, for example, of synthetic resin. As illustrated in  FIG. 10 , the insulator  60  includes sidewalls  61  parallel to the XZ plane. The sidewalls  61  cover a part of the movable insulator  20  from both sides in the Y direction. The sidewalls  61  are disposed between the movable insulator  20  and a second arm portion  34  of the contact  30 . The fixture  80  is a substantially L-shaped fitting. The fixture  80  is supported by the insulator  60 . The fixture  80  is disposed on the inner side of the insulator  60 . The fixture  80  is fixed to the substrate  400  by soldering or the like. 
     As illustrated in  FIGS. 6 to 9 , the fixed insulator  10  is a frame-shaped member formed of an insulating material. The fixed insulator  10  is formed, for example, of synthetic resin. The fixture  40  is a substantially U-shaped fitting. The fixture  40  is supported by the fixed insulator  10 . The fixture  40  is disposed on the inner side of the fixed insulator  10 . The fixture  40  is fixed to the substrate  300  by soldering or the like. 
     As illustrated in  FIGS. 6 to 13 , the fixed insulator  10  includes two first sidewalls  17 , two second sidewalls  18 , a top wall  15 , a plurality of first fixing grooves  11 , and a plurality of partition walls  13 . 
     As illustrated in  FIG. 6 , the first sidewalls  17  are walls parallel to the XZ plane. The two first sidewalls  17  are arranged spaced apart in the Y direction. The second sidewalls  18  are walls that are parallel to the YZ plane. The two second sidewalls  18  are arranged spaced apart in the X direction. The second sidewalls  18  are connected to end portions of the two first sidewalls  17 . The two first sidewalls  17  and the two second sidewalls  18  are arranged to be in a frame shape in the XY-plan view. The top wall  15  is a wall parallel to the XY plane. The top wall  15  is disposed in the +Z direction of the first sidewalls  17  and the second sidewalls  18 . The top wall  15  covers at least a part of the contacts  30 . The top wall  15  overlaps with at least a part of the contacts  30  in the XY-plan view. 
     As illustrated in  FIG. 12 , the first sidewalls  17  are provided with the first fixing grooves  11 . The first fixing grooves  11  extend in the Z direction. The longitudinal direction of the first fixing grooves  11  is parallel to the Z direction. The plurality of first fixing grooves  11  are arranged at an equal interval along the X direction. 
     As illustrated in  FIG. 13 , the partition walls  13  are walls that are parallel to the YZ plane. The partition walls  13  are connected to the first sidewalls  17  and the top wall  15 . The plurality of partition walls  13  are arranged at an equal interval along the X direction. The interval between the plurality of partition walls  13  arranged is equal to the interval between the plurality of first fixing grooves  11  arranged. The partition walls  13  are also referred to as inter-electrode walls. As illustrated in  FIG. 12 , the partition wall  13  includes an inclined surface  131 . The inclined surface  131  inclines away from the second arm portion  34  of the contact  30  described later as it gets closer to a virtual plane P. The virtual plane P is a plane that is parallel to the XY plane and passes through bottom surfaces of a plurality of first base portions  31  described later. 
     As illustrated in  FIG. 6 , the movable insulator  20  is formed of an insulating material. The movable insulator  20  is formed, for example, of synthetic resin. The movable insulator  20  is disposed on the inner side of the fixed insulator  10 . The movable insulator  20  is not fixed relative to the substrate  300 . The movable insulator  20  is connected to the fixed insulator  10  via the contacts  30 . The movable insulator  20  can move relative to the fixed insulator  10  through elastic deformation of the contacts  30 . 
     As illustrated in  FIG. 12 , the movable insulator  20  includes second fixing grooves  21 . The second fixing grooves  21  extend in the Z direction. The longitudinal direction of the second fixing grooves  21  is parallel to the Z direction. A plurality of the second fixing grooves  21  are arranged at an equal interval along the X direction. 
     As illustrated in  FIG. 13 , the contacts  30  are plate-shaped members formed of metal. The thickness direction of the contacts  30  is parallel to the X direction (the arrangement direction). The contacts  30  have a uniform thickness (length in the X direction). All the surfaces of the contacts  30  oriented in the X direction are planar surfaces that are parallel to the YZ plane. The thickness (length in the X direction) of the contacts  30  is smaller than the shortest length of the contacts  30  in a direction orthogonal to the X direction. The contacts  30  are formed, for example, by punching a metal plate using a press machine. The contacts  30  are of what is known as a fork type. As illustrated in  FIG. 14 , the contact  30  includes the first base portion  31 , a second base portion  32 , a first arm portion  33 , the second arm portion  34 , and a contact portion  38 . 
     As illustrated in  FIG. 12 , the first base portion  31  includes a protruding portion  311  that is supported by a corresponding one of the first fixing grooves  11  of the fixed insulator  10 . The protruding portion  311  is pressed into the first fixing groove  11 . The bottom surface of the first base portion  31  is connected to the substrate  300 . The first base portion  31  includes a recessed portion  313 . The recessed portion  313  is disposed at a portion to be connected with the first arm portion  33  of the first base portion  31 . With the recessed portion  313  thus provided, the load on a portion (portion of soldering) of the contact  30  fixed to the substrate  300 , as a result of the movement of the movable insulator  20 , is reduced. 
     As illustrated in  FIG. 12 , the second base portion  32  is supported by a corresponding one of the second fixing grooves  21  of the movable insulator  20 . The second base portion  32  is pressed into the second fixing groove  21 . The contact portion  38  comes into contact with the contact  70  of the connector  200 . 
     As illustrated in  FIG. 12 , the first arm portion  33  is connected only to the first base portion  31  and the second arm portion  34 . As illustrated in  FIG. 13 , the first arm portion  33  is disposed between two partition walls  13  adjacent to each other in the X direction. As illustrated in  FIG. 14 , the first arm portion  33  has a uniform width. The width is the length in a direction orthogonal to a centerline C. The centerline C is a line connecting two points at an equal distance from two outer circumference surfaces, of the first arm portion  33  and the second arm portion  34 , oriented in a direction orthogonal to the thickness direction (X direction). At a position where the centerline C is a curved line, the width is a length in a direction orthogonal to the tangent of the centerline C. The width can also be regarded as a length in a direction orthogonal to the direction in which the first arm portion  33  and the second arm portion  34  extend. 
     As illustrated in  FIG. 14 , the first arm portion  33  includes a first slit  330 , a first linear portion  331 , a first bent portion  332 , a second linear portion  333 , a second bent portion  334 , and a connection portion  335 . A dashed line in  FIG. 14  indicates a position of an end portion of the partition wall  13  in the Y direction that is farthest from the first sidewall  17 . A section on the left side of the dashed line in  FIG. 14  is a space sandwiched between the partition walls  13 . A section on the right side of the dashed line in  FIG. 14  is outside of the space sandwiched between the partition walls  13 . 
     As illustrated in  FIG. 14 , the first slit  330  is a slit that is formed through the first arm portion  33  in the X direction. The number of first slits  330  is one. The first slit  330  has a uniform width except for the end portion. The center position of the first slit  330  in the width direction is the same as the center position of the first arm portion  33  in the width direction. Thus, portions of the first arm portion  33  on both sides of the first slit  330  have uniform widths except for the end portions and are equal to each other. In other words, a width W 3  of one portion of the first slit  330  in the first arm portion  33  is equal to a width W 4  of the other portion of the first slit  330  in the first arm portion  33 . 
     As illustrated in  FIG. 14 , the first linear portion  331  is connected to the first base portion  31 . The first linear portion  331  is linear in the YZ-plan view. The two outer circumference surfaces of the first linear portion  331  oriented in the direction orthogonal to the thickness direction are planar and parallel to each other. 
     As illustrated in  FIG. 14 , the first bent portion  332  is connected to the first linear portion  331 . The first bent portion  332  is curved in the YZ-plan view. The first bent portion  332  is bent in the YZ-plan view. The two outer circumference surfaces of the first bent portion  332  oriented in the direction orthogonal to the thickness direction are curved. The first bent portion  332  is convex toward the second base portion  32 . 
     As illustrated in  FIG. 14 , the second linear portion  333  is connected to the first bent portion  332 . The second linear portion  333  is linear in the YZ-plan view. The two outer circumference surfaces of the second linear portion  333  oriented in the direction orthogonal to the thickness direction are planar and parallel to each other. 
     As illustrated in  FIG. 14 , the second bent portion  334  is connected to the second linear portion  333 . The second bent portion  334  is curved in the YZ-plan view. The second bent portion  334  is bent in the YZ-plan view. The two outer circumference surfaces of the second bent portion  334  oriented in the direction orthogonal to the thickness direction are curved. The second bent portion  334  is convex toward the first base portion  31 . 
     As illustrated in  FIG. 14 , the connection portion  335  is connected to the second bent portion  334 . The connection portion  335  is linear in the YZ-plan view. The two outer circumference surfaces of the connection portion  335  oriented in the direction orthogonal to the thickness direction are planar and parallel to each other. 
     As illustrated in  FIG. 12 , the second arm portion  34  is connected only to the first arm portion  33  and the second base portion  32 . As illustrated in  FIG. 13 , the second arm portion  34  is disposed closer to the second base portion  32  than the partition wall  13  is. The second arm portion  34  is disposed outside the space sandwiched between the two partition walls  13 . As illustrated in  FIG. 14 , the width of the second arm portion  34  is not uniform. The second arm portion  34  has the smallest width at a portion connected to the first arm portion  33 . 
     As illustrated in  FIG. 14 , the second arm portion  34  includes a second slit  340 , a connection portion  341 , a first linear portion  342 , a first bent portion  343 , a second linear portion  344 , a second bent portion  345 , and a third linear portion  346 . 
     As illustrated in  FIG. 14 , the second slit  340  is a slit that is formed through the second arm portion  34  in the X direction. The number of second slits  340  is one. The second slit  340  is connected to the first slit  330 . The width of the second slit  340  is not uniform. The center position of the first slit  330  in the width direction is the same as the center position of the second arm portion  34  in the width direction. Portions of the second arm portion  34  on both sides of the second slit  340  have uniform widths except for the end portions and are equal to each other. In other words, a width W 5  of one portion of the second slit  340  in the second arm portion  34  is equal to a width W 6  of the other portion of the second slit  340  in the second arm portion  34 . The widths  5  and W 6  are equal to the width W 3  and width  4  of the first arm portion  33 . 
     As illustrated in  FIG. 14 , the connection portion  341  is connected to the connection portion  335  of the first arm portion  33 . A portion of the outer circumference surface of the connection portion  341  oriented in the +Z direction is planar. The outer circumference surface of the connection portion  341  oriented in the +Z direction and the outer circumference surface of the connection portion  335  oriented in the +Z direction form planar facing surfaces  35 . The facing surfaces  35  face the top wall  15  of the fixed insulator  10 . 
     As illustrated in  FIG. 14 , the first linear portion  342  is connected to the connection portion  341 . The first linear portion  342  is linear in the YZ-plan view. The two outer circumference surfaces of the first linear portion  342  oriented in the direction orthogonal to the thickness direction are planar and parallel to each other. 
     As illustrated in  FIG. 14 , the first bent portion  343  is connected to the first linear portion  342 . The first bent portion  343  is curved in the YZ-plan view. The first bent portion  343  is bent in the YZ-plan view. The two outer circumference surfaces of the first bent portion  343  oriented in the direction orthogonal to the thickness direction are curved. The first bent portion  343  is convex toward the second base portion  32 . 
     As illustrated in  FIG. 14 , the second linear portion  344  is connected to the first bent portion  343 . The second linear portion  344  is linear in the YZ-plan view. The two outer circumference surfaces of the second linear portion  344  oriented in the direction orthogonal to the thickness direction are planar and parallel to each other. 
     As illustrated in  FIG. 14 , the second bent portion  345  is connected to the second linear portion  344 . The second bent portion  345  is curved in the YZ-plan view. The second bent portion  345  is bent in the YZ-plan view. The two outer circumference surfaces of the second bent portion  345  oriented in the direction orthogonal to the thickness direction are curved. The second bent portion  345  is convex toward the first base portion  31 . 
     As illustrated in  FIG. 14 , the third linear portion  346  is connected to the second bent portion  345  and the second base portion  32 . The third linear portion  346  is linear in the YZ-plan view. The two outer circumference surfaces of the third linear portion  346  oriented in the direction orthogonal to the thickness direction are planar and parallel to each other. The third linear portion  346  includes an inclined inner wall  3461 . The inclined inner wall  3461  is an inner wall of the third linear portion  346  that faces the second slit  340 . The inclined inner wall  3461  is inclined to reduce the width of the second slit  340  toward the second base portion  32 . 
     As illustrated in  FIG. 14 , the second arm portion  34  has the largest width at the second bent portion  345 . The second slit  340  has the largest width at the second bent portion  345 . A largest width Wa of the first arm portion  33  is smaller than a largest width Wb of the second arm portion  34 . A largest width W 1  of the first slit  330  is smaller than a largest width W 2  of the second slit  340 . 
       FIG. 15  is a schematic view of a connector of Comparative Example.  FIG. 16  is a graph illustrating differential impedance of the connector of the embodiment and the connector of Comparative Example. 
     The contacts  30  are required to be capable of supporting high speed transmission. In this context, the characteristic impedance of the contacts  30  needs to be adjusted with higher accuracy. However, improvement in the adjustment of the characteristic impedance of the contacts  30  is not an easy task. As illustrated in  FIG. 15 , contacts of Comparative Example have a shape different from that of the contacts  30  of the present embodiment. In Comparative Example, the largest width of the portion corresponding to the first arm portion  33  is equal to the largest width of the portion corresponding to the second arm portion  34 . 
       FIG. 16  illustrates the characteristic impedance of the contacts  30  of the present embodiment and the characteristic impedance of the contacts of Comparative Example under the same experimental conditions. As illustrated in  FIG. 16 , a change in characteristic impedance of the contacts of Comparative Example is greater than a change in characteristic impedance of contacts  30  of the present embodiment. With the contacts  30  of the present embodiment, a change in the characteristic impedance of the contacts  30  can be suppressed. Specifically, the characteristic impedance of the contacts  30  tends to decrease excessively in the portion (first arm portion  33 ) of the contacts  30  disposed in the space sandwiched between the partition walls  13 . In the contacts  30  of the present embodiment, the largest width Wa of the first arm portion  33  is smaller than the largest width Wb of the second arm portion  34 . With this configuration, excessive reduction of the characteristic impedance of the contacts  30  is suppressed. 
     Note that the shape of the contacts  30  is not limited to the shape described above. The contacts  30  may have a shape different from the shape described above, as long as the condition that at least the largest width of the first arm portion  33  is smaller than the largest width of the second arm portion  34  is satisfied. Furthermore, the number of each of the first slits  330  and the second slits  340  does not necessarily need to be one. The contacts  30  may include a plurality of the first slits  330  or a plurality of the second slits  340 . 
     The protruding portion  311  of the contact  30  does not need to be pressed into the first fixing groove  11  of the fixed insulator  10 . For example, the protruding portion  311  and the first fixing groove  11  may be integrally formed by insert molding. The second base portion  32  of the contact  30  does not need to be pressed into the second fixing groove  21  of the movable insulator  20 . For example, the second base portion  32  and the second fixing groove  21  may be integrally formed by insert molding. Furthermore, the protruding portion  311  and the first fixing groove  11  may be integrally formed by insert molding, and the second base portion  32  and the second fixing groove  21  may be integrally formed by insert molding. 
     As described above, the connector  100  includes the fixed insulator  10 , the movable insulator  20 , and the plurality of contacts  30 . The movable insulator  20  is disposed on the inner side of the fixed insulator  10  and is movable relative to the fixed insulator  10 . The contacts  30  are attached to the fixed insulator  10  and the movable insulator  20 . The fixed insulator  10  includes the plurality of first fixing grooves  11  disposed along the arrangement direction (X direction) in which the plurality of contacts  30  are arranged, and the partition walls  13  each disposed between two adjacent contacts  30 . The movable insulator  20  includes the plurality of second fixing grooves  21  disposed along the arrangement direction (X direction). The contacts  30  each include the first base portion  31  supported by a corresponding one of the first fixing grooves  11 , the second base portion  32  supported by a corresponding one of the second fixing grooves  21 , the first arm portion  33  connected to the first base portion  31  and disposed between two corresponding adjacent ones of the partition walls  13 , and the second arm portion  34  connected to the first arm portion  33  and the second base portion  32 . A largest width Wa of the first arm portion  33  is smaller than a largest width Wb of the second arm portion  34 . 
     To support transmission of a higher speed, adjustment of the characteristic impedance of the connector with an even higher accuracy has been demanded. Unfortunately, it may be difficult to finely adjust the characteristic impedance of the contacts of the connector of Patent Document 1. Thus, there has been a demand for a connector that enables improvement in flexibility and adjustment of the characteristic impedance of the contacts with higher accuracy. 
     Due to the largest width Wa of the first arm portion  33  being smaller than the largest width Wb of the second arm portion  34 , elastic deformation of the contact  30  is facilitated. Thus, the movement of the movable insulator  20  is facilitated when the connector  100  and the other connector  200  mate or are in the mating state. With the connector  100 , flexibility under the floating condition can be improved. Furthermore, due to the largest width W 1  of the first slit  330  being smaller than the largest width W 2  of the second slit  340 , excessive reduction of the characteristic impedance of the first arm portion  33  sandwiched between the partition walls  13  is suppressed. As a result, the characteristic impedance of the contacts  30  can be adjusted with higher accuracy. Thus, the connector  100  of the present embodiment enables improvement in flexibility and adjustment of the characteristic impedance of the contacts  30  with higher accuracy. 
     In the connector  100 , the second arm portion  34  is disposed closer to the second base portion  32  than the partition wall  13  is. With this configuration, the movable range of the contacts  30  is increased. 
     In the connector  100 , the thickness direction of the contacts  30  is the arrangement direction. With this configuration, the contacts  30  can be easily produced by punching a metal plate using a press machine. 
     In the connector  100 , at least one of the first arm portion  33  and the second arm portion  34  includes a linear portion (for example, the first linear portion  342 ) that is linear and a bent portion (for example, the first bent portion  343 ) that is bent. With this configuration, in the connector  100  of the present embodiment, the movable insulator  20  can move with a stable posture. Furthermore, elastic deformation of the contacts  30  is facilitated. The connector  100  of the present embodiment can further improve flexibility under the floating condition. 
     In the connector  100 , the first arm portion  33  includes the first slit  330  that is a slit formed through the first arm portion  33  in the arrangement direction (X direction). The second arm portion  34  includes the second slit  340  that is a slit formed through the second arm portion  34  in the arrangement direction (X direction). The largest width W 1  of the first slit  330  is smaller than the largest width W 2  of the second slit  340 . With this configuration, elastic deformation of the contacts  30  is further facilitated. With the connector  100 , flexibility under the floating condition can be further improved. Furthermore, excessive reduction of the characteristic impedance of the first arm portion  33  sandwiched between the partition walls  13  can be further suppressed. Thus, the connector  100  enables the characteristic impedance of the contacts  30  to be adjusted with higher accuracy. 
     In the connector  100 , the number of first slits  330  and the number of second slits  340  is one. With this configuration, the contacts  30  have a simple shape, and thus can be easily produced. The connector  100  of the present embodiment enables the characteristic impedance of the contacts  30  to be adjusted with higher accuracy. 
     The widths (the width W 3  and the width W 4 ) of the portions of the first arm portion  33  on both sides of the first slit  330  are equal to the widths (the width W 5  and the width W 6 ) of the portions of the second arm portion  34  on both sides of the second slit  340 . With this configuration, stable electrostatic capacitance between the first slit  330  and the second slit  340  is achieved. Thus, the connector  100  of the present embodiment enables adjustment of the characteristic impedance of the contacts  30  with higher accuracy. 
     In the connector  100 , the second arm portion  34  includes the first bent portion  343  that is convex toward the second base portion  32 , and the second bent portion  345  that is convex toward the first base portion  31 . With this configuration, elastic deformation of the contacts  30  is facilitated. The connector  100  of the present embodiment can further improve flexibility under the floating condition. 
     In the connector  100 , the second slit  340  has the largest width at the second bent portion  345 . With this configuration, elastic deformation of the contacts  30  is facilitated. The connector  100  of the present embodiment can further improve flexibility under the floating condition. 
     In the connector  100 , the second arm portion  34  includes the inclined inner wall  3461  that is inclined to reduce the width of the second slit  340  toward the second base portion  32 , between the second base portion  32  and the second bent portion  345 . With this configuration, the rigidity of the inclined inner wall  3461  is improved, whereby deformation of the inclined inner wall  3461  while the contacts  30  are pressed into the second fixing grooves  21  of the movable insulator  20  can be suppressed. 
     In the connector  100 , the partition walls  13  each include the inclined surface  131  inclining away from the second arm portion  34  as it gets closer to the virtual plane P passing through the bottom surfaces of the plurality of first base portions  31 . With this configuration, the second arm portion  34  is less likely to come into contact with the partition walls  13  while the movable insulator  20  moves. Thus, deformation of the second arm portion  34  can be suppressed, whereby the flexibility of the connector  100  under the floating condition can be further improved. Furthermore, with the connector  100 , shaving of the partition walls  13  due to the contact between the second arm portion  34  and the partition walls  13  can be suppressed. 
     The embodiment according to the present disclosure can be modified without departing from the main point or the scope of the present invention. In addition, the embodiment of the present disclosure and modified examples thereof can be combined as appropriate. For example, the embodiment described above can be modified in the following manner. 
     First Modified Example 
       FIG. 17  is a side view of a contact of a first modified example. As illustrated in  FIG. 17 , a contact  30 A of the first modified example includes a first arm portion  33 A different from the first arm portion  33  described above. Note that the same reference characters are attached to constituent elements that are the same as those described in the embodiment described above, and explanation thereof will not be repeated. 
     As illustrated in  FIG. 17 , the first arm portion  33 A includes two first slits  330 A and an intermediate portion  336 . The first slit  330 A is a slit that is formed through the first arm portion  33 A in the X direction. One first slit  330 A is provided from the first linear portion  331  to the second linear portion  333 . The other first slit  330 A is provided from the second linear portion  333  to the connection portion  335  and is connected to the second slit  340 . The first slit  330 A has a uniform width except for the end portion. The center position of the first slit  330 A in the width direction is the same as the center position of the first arm portion  33 A in the width direction. Thus, portions of the first arm portion  33 A on both sides of the first slit  330 A have uniform widths except for the end portions and are equal to each other. The largest width W 1  of the first slit  330 A is smaller than the largest width W 2  of the second slit  340 . The largest width Wa of the first arm portion  33 A is smaller than the largest width Wb of the second arm portion  34 . 
     The intermediate portion  336  is disposed in the second linear portion  333 . The intermediate portion  336  is provided between the two first slits  330 A. Note that the intermediate portion  336  does not need to be provided in the second linear portion  333 . The intermediate portion  336  may be provided in the first linear portion  331 , the first bent portion  332 , the second bent portion  334 , or the connection portion  335 . 
     Second Modified Example 
       FIG. 18  is a side view of a contact of a second modified example. As illustrated in  FIG. 18 , a contact  30 B of the second modified example includes a first arm portion  33 B different from the first arm portion  33  described above, and a second arm portion  34 B different from the second arm portion  34 . Note that the same reference characters are attached to constituent elements that are the same as those described in the embodiment described above, and explanation thereof will not be repeated. 
     As illustrated in  FIG. 18 , the first arm portion  33 B includes a protruding portion  337 . The protruding portion  337  is provided on the outer circumference surface of the second linear portion  333 . Thus, the first arm portion  33 B does not have a uniform width. Note that the protruding portion  337  may be provided on an inner circumference surface of the second linear portion  333 . The protruding portion  337  may also be provided in the first linear portion  331 , the first bent portion  332 , the second bent portion  334 , or the connection portion  335 . 
     The second arm portion  34 B includes protruding portions  347  and protruding portions  348 . The protruding portions  347  protrude from the outer circumference surface and the inner circumference surface of the first linear portion  342 . The protruding portions  348  protrude from the outer circumference surface and the inner circumference surface of the second linear portion  344 . Thus, the second arm portion  34 B does not have a uniform width. Note that the protruding portions  347  and the protruding portions  348  may be provided in the connection portion  341 , the first bent portion  343 , the second bent portion  345 , or the third linear portion  346 . The largest width Wa of the first arm portion  33 B is smaller than the largest width Wb of the second arm portion  34 B. 
     Third Modified Example 
       FIG. 19  is a side view of a contact of a third modified example. As illustrated in  FIG. 19 , a contact  30 C of the third modified example includes a first arm portion  33 C different from the first arm portion  33  described above. Note that the same reference characters are attached to constituent elements that are the same as those described in the embodiment described above, and explanation thereof will not be repeated. 
     As illustrated in  FIG. 19 , the first arm portion  33 C includes two First slits  330 C and an intermediate portion  339 . The first slit  330 C is a slit that is formed through the first arm portion  33 C in the X direction. The two first slits  330 C are disposed so as to be adjacent to each other in the width direction. The two first slits  330 C are provided from the first linear portion  331  to the connection portion  335 . The two first slits  330 C have uniform widths except for the end portions. The centers of the first slits  330 C in the width direction are disposed on lines that trisect the length of the first arm portion  33 C in the width direction. Thus, portions of the first arm portion  33 C separated from each other by the first slits  330 C have uniform widths except for the end portions and are equal to each other. A width W 13 , a width W 14 , and a width W 15  illustrated in  FIG. 19  are equal to each other. A largest width W 11  and a largest width W 12  of the first slits  330 C are smaller than the largest width W 2  of the second slit  340 . The largest width Wa of the first arm portion  33 C is smaller than the largest width Wb of the second arm portion  34 . 
     The intermediate portion  339  is disposed in the connection portion  335 . The intermediate portion  336  is provided between the two first slits  330 C and the second slit  340 . Note that the intermediate portion  339  does not need to be provided in the connection portion  335 . The intermediate portion  339  may be provided in the first linear portion  331 , the first bent portion  332 , the second linear portion  333 , or the second bent portion  334 . 
     Fourth Modified Example 
       FIG. 20  is a perspective view of a contact of a fourth modified example. As illustrated in  FIG. 20 , a contact  30 D of the fourth modified example includes a first base portion  31 D different from the first base portion  31  described above. Note that the same reference characters are attached to constituent elements that are the same as those described in the embodiment described above, and explanation thereof will not be repeated. 
     As illustrated in  FIG. 20 , the first base portion  31 D includes a protruding portion  311 D that fits in the first fixing groove  11  of the fixed insulator  10 . The protruding portion  311 D is pressed into the first fixing groove  11 , The protruding portion  311 D is formed by bending a part of the first base portion  31  in the arrangement direction (X direction) in which the plurality of contacts  30  are arranged. 
     Fifth Modified Example 
       FIG. 21  is a cross-sectional view of the connector of the embodiment and another connector of a fifth modified example after the mating. Note that the same reference characters are attached to constituent elements that are the same as those described in the embodiment described above, and explanation thereof will not be repeated. 
     As illustrated in  FIG. 21 , another connector  200 E of the fifth modified example includes an insulator  60 E. The insulator  60 E is a member formed of an insulating material. The insulator  60 E is formed, for example, of synthetic resin. The insulator  60 E does not include the sidewalls  61  described above. Because the space between the fixed insulator  10  and the movable insulator  20  is widened, contact between the contacts  30  and the sidewalls  61  during elastic deformation of the contacts  30  can be suppressed. Further, with the sidewalls  61  not provided, the connector of the embodiment can be downsized in the direction (Y direction) orthogonal to the arrangement direction. The partition wall  13  may extend to a virtual plane Q as illustrated in  FIG. 21 . The virtual plane Q is a plane that is parallel to the XY plane and passes through the bottom surface of the fixed insulator  10 . 
     REFERENCE SIGNS LIST 
     
         
           10  Fixed insulator 
           11  First fixing groove 
           13  Partition wall 
           15  Top wall 
           17  First sidewall 
           18  Second sidewall 
           20  Movable insulator 
           21  Second fixing groove 
           30 ,  30 A,  30 B,  30 C,  30 D Contact 
           31 ,  31 D First base portion 
           32  Second base portion 
           33 ,  33 A,  33 B,  33 C,  33 D First arm portion 
           34 ,  34 B Second arm portion 
           35  Facing surface 
           38  Contact portion 
           40  Fixture 
           60 ,  60 E Insulator 
           61  Sidewall 
           70  Contact 
           80  Fixture 
           100  Connector 
           131  Inclined surface 
           200 ,  200 E Connector 
           300  Substrate 
           311 ,  311 D Protruding portion 
           313  Recessed portion 
           330 ,  330 A,  330 C First slit 
           331  First linear portion 
           332  First bent portion 
           333  Second linear portion 
           334  Second bent portion 
           335  Connection portion 
           336  Intermediate portion 
           337  Protruding portion 
           339  Intermediate portion 
           340  Second slit 
           341  Connection portion 
           342  First linear portion 
           343  First bent portion 
           344  Second linear portion 
           345  Second bent portion 
           346  Third linear portion 
           347 ,  348  Protruding portion 
           400  Substrate 
           1000  Electronic device 
           3461  Inclined inner wall 
         C Centerline 
         P Virtual plane