Abstract:
[Problem] To achieve compatibility between push-type and screw-type terminals of mounted printed circuit substrates. [Solution] A speaker terminal attachment base ( 1 ) allows both push- and screw-type connectors ( 2, 3 ) to be attached thereto. A connector anchoring boss part ( 111 ), whereby a terminal part ( 121 ) with a through hole ( 1211 ) is anchored, is formed upon an attachment base ( 1 ), and a through hole ( 1112 ), which connects to the through hole ( 1211 ) of the terminal part ( 121 ), is formed upon the connector anchoring boss part ( 111 ). The through hole ( 1112 ) comprises a large diameter part ( 11121 ), and a small diameter part ( 11122 ). When the screw-type connector ( 3 ) is attached, a nut ( 5 ) which sends a male screw part ( 312 ) of the connector ( 3 ) in the axial direction is non-rotatably housed in the large diameter part ( 11121 ) before a terminal plate ( 12 ) is attached. When the push-type connector ( 2 ) is attached, a flat face ( 11123 ) which is formed in the inner circumference of the small diameter part ( 11122 ) makes planar contact with a flat face ( 2115 ) of the connector ( 2 ), preventing the rotation of the connector ( 2 ).

Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to a terminal suited for use as a speaker terminal in an audio device, such as an audio amplifier and an audio receiver, and more particularly, to the structure of a terminal also usable as any of a push-type connector and a screw-type connector. 
       BACKGROUND ART 
       [0002]    As a speaker terminal to be arranged on a rear panel and the like of an audio device, such as an audio amplifier and an audio receiver, there are known a screw-type speaker terminal, in which a speaker cable is pressed against a terminal component by fastening a male screw part formed on an outer peripheral surface of a shaft into a female screw, and a push-type speaker terminal, in which a speaker cable inserted into a cable insertion hole of a stud electrically connected to a terminal component is pressed against an inner wall of the cable insertion hole by a restoring force of a compressed spring. 
         [0003]    For example, in Patent Literature 1, a screw-type speaker terminal is described. This speaker terminal includes a connector part including a shaft having a male screw formed on an outer peripheral surface of the shaft, a bottomed tubular terminal component having a female screw cut into an inner peripheral surface thereof, into which the male screw of the shaft of the connector part is fastened, and a housing including a tubular part into which the terminal component is to be fitted and fixed. 
         [0004]    Cable insertion ports connecting the outside of the tubular part of the housing to an internal space of the terminal component are formed in the tubular part of the housing and in the terminal component fitted into the tubular part. A tip portion of the cable is inserted from the cable insertion ports and is received in the internal space of the terminal component. Further, a press-contact surface of the shaft tip is guided toward the bottom surface of the terminal component by tightening the male screw on the shaft outer peripheral surface and the female screw in the terminal component inner peripheral surface together so that the tip portion of the cable received in the internal space of the terminal component is pressed against the bottom surface of the terminal component. 
         [0005]    On the other hand, in Patent Literature 2, a push-type speaker terminal is described. The speaker terminal includes a flat plate-shaped housing, a plate-shaped terminal member mounted to a front surface of the housing, and a push-type connector part mounted to the front surface of the housing across the terminal member. The push-type connector part includes a stud with a cable insertion hole, in which the terminal member is electrically connected to one end portion of the stud, and a cap with a cable insertion hole, which is placed on another end portion of the stud. Generally, the end portion of the speaker cable, which is inserted into the cable insertion hole of the stud through the cable insertion hole of the cap pushed onto the stud while compressing a spring, is pushed against the inner wall of the cable insertion hole of the stud due to the cap being pushed back by the restoring force of the spring. 
       CITATION LIST 
     Patent Literature 
       [0006]    [PTL 1] JP 2004-127823 A 
         [0007]    [PTL 2] JP 2007-135043 A 
       SUMMARY OF INVENTION 
     Technical Problem 
       [0008]    For example, the type of speaker terminal to be used may be different for each product model segment, such as an intended market and a class. However, the screw-type speaker terminal and the push-type speaker terminal both include a specific housing, and hence in many cases cannot be connected to a common printed circuit board (PCB). Therefore, a PCB-compatible design cannot be achieved among different product model segments, thereby causing deterioration in design efficiency. Further, a common PCB cannot be shared among different product model segments, thereby causing increase in production costs. 
         [0009]    The present invention has been made in view of the circumstances described above. It is an object of the present invention to provide a common printed circuit board to which a push-type terminal and a screw-type terminal can be mounted. 
       Solution to Problem 
       [0010]    In order to attain the object described above, according to one embodiment of the present invention, there is provided a terminal mounting base to which two connectors each being configured to electrically connect an externally inserted cable and a terminal member to each other are to be mounted, the terminal mounting base including:
       two of the terminal members arranged corresponding to the two connectors, respectively; and   a housing including terminal fixing parts for the two of the terminal members, which are configured to fix the two of the terminal members, the housing being configured so that, as the two connectors, a screw-type connector and a push-type connector are mountable to the housing,   each of the two of the terminal members having a through hole formed therein,   each of the terminal fixing parts of the housing having a stepped through hole formed therein to be connected to the through hole of the each of the two of the terminal members,   the stepped through hole including:
           a first hole portion configured to receive a nut threadedly engageable onto, when a metal member of the screw-type connector is inserted into the stepped through hole of the each of the terminal fixing parts through the through hole of the each of the two of the terminal members, a screw part formed on the metal member so that the screw-type connector is moved in a direction in which the externally inserted cable is pushed against the each of the two of the terminal members, or in a direction in which the externally inserted cable is moved away from the each of the two of the terminal members; and   a second hole portion having a smaller diameter than the first hole portion, the second hole portion including a rotation stopping portion formed in an inner wall thereof, which is configured to prevent rotation of the push-type connector by coming into contact with, when a metal member of the push-type connector is inserted into the stepped through hole of the each of the terminal fixing parts through the through hole of the each of the two of the terminal members, a rotation stopped portion formed on the metal member.   
               
 
         [0018]    Further, according to one embodiment of the present invention, there is provided a terminal, including:
       the above-mentioned terminal mounting base; and   a push-type connector or a screw-type connector, which is mounted to the terminal mounting base.       
 
         [0021]    Further, according to one embodiment of the present invention, there is provided an audio device, including:
       a plurality of the above-mentioned terminals,   the plurality of the terminals being arranged in a line so that the cable insertion port of the each of the resin covers of the two connectors is oriented in an upward direction.       
 
       Advantageous Effects of Invention 
       [0024]    According to the one embodiment of the present invention, any of the push-type connector and the screw-type connector can be mounted to the common housing. As a result, it is possible to provide the common printed circuit board to which the push-type terminal and the screw-type terminal can be mounted. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0025]      FIG. 1(A)  is an external view of a mounting base  1  of a speaker terminal  100 A or  100 B according to an embodiment of the present invention,  FIG. 1(B)  is a front view of the mounting base  1  illustrated in  FIG. 1(A) , and  FIG. 1(C)  is a cross-sectional view of the mounting base  1  taken along the line A-A in  FIG. 1(B) . 
           [0026]      FIG. 2(A)  is an external view of the push-type speaker terminal  100 A according to an embodiment of the present invention, and  FIG. 2(B)  is a cross-sectional view of a mounting part of a push-type connector  2  for the speaker terminal  100 A. 
           [0027]      FIG. 3(A)  is an external view of the screw-type speaker terminal  100 B according to an embodiment of the present invention, and  FIG. 3(B)  is a cross-sectional view of a mounting part of a screw-type connector  3  for the speaker terminal  100 B. 
           [0028]      FIG. 4(A)  is a diagram for illustrating a partial layout of the speaker terminals  100 A or  100 B on a rear panel  7  of an audio device, and  FIG. 4(B)  is a diagram for illustrating mounting of the speaker terminal  100 A or  100 B to the rear panel  7 . 
       
    
    
     DESCRIPTION OF EMBODIMENTS 
       [0029]    An embodiment of the present invention is now described with reference to the drawings based on an example in which the present invention is applied to a speaker terminal. 
         [0030]    The speaker terminal according to this embodiment may be applied as any one of push-type and screw-type (binding post-type) speaker terminals  100 A and  100 B by selectively mounting a push-type connector  2  and a screw-type connector  3 . Specifically, the speaker terminals  100 A and  100 B according to this embodiment each include a mounting base  1  to which both the push-type and screw-type connectors  2  and  3  may be mounted. First, after describing the configuration of the mounting base  1 , which is a common component of the push-type speaker terminal  100 A and the screw-type speaker terminal  100 B, the overall configuration of each of the push-type and screw-type speaker terminals  100 A and  100 B is described. 
         [0031]      FIG. 1(A)  is an external view of the mounting base  1  of the speaker terminal  100 A or  100 B according to this embodiment,  FIG. 1(B)  is a front view of the mounting base illustrated in  FIG. 1(A) , and  FIG. 1(C)  is a cross-sectional view of the mounting base  1  taken along the line A-A in  FIG. 1(B) . 
         [0032]    As illustrated in  FIG. 1 , the mounting base  1  includes two terminal plates  12 , three lugs (two terminal lugs and one earth lug) (not shown), and a housing  11  to which those metal members are fixed. 
         [0033]    The two terminal plates  12  each integrally include a rectangular terminal part  121  and two leg parts  122  extending from both ends of the terminal part  121 . 
         [0034]    The terminal part  121  is arranged on an end surface of a connector fixing boss part  111  of the housing  11 . A through hole  1211  connecting to a stepped through hole  1112  formed in the connector fixing boss part  111  of the housing  11  is formed in the terminal part  121  as an insertion hole  123  for a stud  21  (see  FIG. 2 ) of the push-type connector  2  or a screw part  312  (see  FIG. 3 ) of the screw-type connector  3 . 
         [0035]    The two leg parts  122  are bent from the terminal part  121 , and inserted into terminal insertion slots  1111  formed in the connector fixing boss part  111  of the housing  11 . Each of the leg parts  122  has a sideways U-shaped cutout open to the terminal part  121  side. A locking claw  124  is formed by bending a strip-shaped portion surrounded by the cutout. As described later, when the leg parts  122  are inserted into the terminal insertion slots  1111 , the locking claw  124  abuts against an end surface of a groove  1113  formed in an inner wall surface of the terminal insertion slot  1111 , which prevents the leg parts  122  from slipping out from the two terminal insertion slots  1111 . As a result, the terminal part  121  is fixed to the end surface of the connector fixing boss part  111  of the housing  11 . 
         [0036]    The housing  11  integrally includes a plate-shaped housing body  110 , a snap-fit part  113  formed on one surface (back surface) of the housing body  110 , two connector fixing boss parts  111  formed on another surface (front surface) of the housing body  110 , and a tubular cover part  112  configured to surround each of the connector fixing boss parts  111 . In addition, although not all are shown, in order to fix the three lugs, for each lug, a lug fixing boss part  114  for fixing one end portion (end portion to be connected to the terminal plate  12 ) of the lug, and a two-pronged lug holding part  115  configured to position another end portion (end portion to be connected to a PCB hole) of the lug at a position determined based on a layout of the holes in the PCB are integrally formed on the back surface of the housing body  110 . 
         [0037]    The housing body  110  is arranged at a predetermined position in a case of the audio device so that the front surface of the housing body  110  faces the back surface of the rear panel of the audio device. The snap-fit part  113  is fitted into a predetermined locking hole formed in the PCB, for example. In addition, the PCB is mounted to a predetermined position in the case of the audio device. As a result, the housing body  110  is fixed to the case of the audio device in this posture. 
         [0038]    The stepped through hole  1112  connecting to the back surface of the housing body  110  and the two terminal insertion slots  1111 , which are arranged facing each other across the stepped through hole  1112 , are formed in an end surface of each of the two connector fixing boss parts  111 . 
         [0039]    The stepped through hole  1112  includes a large-diameter portion  11121 , which has a larger diameter than the through hole  1211  of the terminal part  121 , and a small-diameter portion  11122 , which is positioned on the back surface side of the housing body  110  with respect to the large-diameter portion  11121 . When the screw-type connector  3  is to be mounted to the mounting base  1 , a nut  5  that moves a male screw part  312  of the connector  3  in an axial direction is received in the large-diameter portion  11121  before mounting the terminal plate  12  (see  FIG. 3 ). On an inner peripheral surface of the large-diameter portion  11121 , for example, a flat surface facing at least one of six flat surfaces formed on the outer periphery of the nut  5  is formed. The nut  5  is prevented from rotating in the large-diameter portion  11121  due to this flat surface coming into surface contact with the flat surface of the outer periphery of the nut  5 . On the other hand, a flat surface  11123  for stopping rotation is formed in the axial direction on an inner periphery of the small-diameter portion  11122 . When mounting the push-type connector  2  to the mounting base  1 , a fixing part  2112  of the connector  2  is press-fitted into the small-diameter portion  11122 . As a result, a nut  4  is fastened onto a screw part  212  of the connector  2  protruding on the back surface side of the housing body  110 . At this point, the flat surface  11123  on the inner periphery of the small-diameter portion  11122  is in surface contact with a flat surface  2115  formed on the outer periphery of the fixing part  2112  of the push-type connector  2 , which prevents the push-type connector  2  from rotating with respect to the housing body  110  (see  FIG. 2 ). 
         [0040]    Of the inner wall surfaces of each of the terminal insertion slots  1111 , the wall surface facing the locking claw  124  of the leg part  122  of the terminal plate  12  has the groove  1113  formed therein from a position in the terminal insertion slot  1111  toward an insertion direction of the leg part  122  of the terminal plate  12  (back surface side of the housing body  110 ). When the two leg parts  122  of the terminal plate  12  are inserted into the respective terminal insertion slots  1111 , the locking claw  124  of each of the leg parts  122  is elastically deformed in a flat direction based on the width of the terminal insertion slot  1111 . When the locking claw  124  reaches the position of the groove  1113  in the inner wall of the terminal insertion slot  1111 , the locking claw  124  is raised up in an amount equal to the depth of the groove  1113 . As a result, the locking claw  124  of each of the two leg parts  122  abuts against the end portion of the groove  1113 , which prevents the leg parts  122  from slipping out from the two terminal insertion slots  1111 . As a result, the terminal part  121  is fixed to the end surface of the connector fixing boss part  111  of the housing  11 . 
         [0041]    Each cover part  112  includes two cable insertion ports  1121  formed in a direction substantially perpendicular to the direction of the arrangement of the connector fixing boss parts  111 . The two cable insertion ports  1121  are formed facing each other across the connector fixing boss part  111 . The cable insertion part of the connector  2  or  3 , which may be any one of the push-type and screw-type connectors, is also arranged on an inner side of the cover part  112 , and hence a core of the speaker cable is inserted into the cable insertion part of the connector  2  or  3  through the cable insertion port  1121  of the cover part  112 . 
         [0042]    In one of the three lug fixing boss parts  114 , a screw hole  1141  passing from the front surface of the housing body  110  to the end surface of the lug fixing boss part  114  is formed. Further, a lug insertion slot (not shown) intersecting the screw hole  1141  is formed in an end surface of the lug fixing boss part  114 , and one end portion of the earth lug is fitted into the lug insertion slot. A screw  6  (see  FIG. 4 ) inserted in a through hole formed in the rear panel  7  of the audio device is fastened into the screw hole  1141 . As a result, the housing body  110  is fixed to the back side of the rear panel  7  of the audio device, and the one end portion of the earth lug is grounded to the case of the audio device by being electrically connected to the tip of the screw in the screw hole  1141 . 
         [0043]    Each of the other two lug fixing boss parts  114  is formed at a position on the opposite side (back surface side of the housing body  110 ) of the connector fixing boss part  111  across the housing body  110 . On an end surface of each of those lug fixing boss parts  114 , there is formed a lug insertion slot  1142  connected to one of the two terminal insertion slots  1111  of the corresponding connector fixing boss part  111 . One end portion of each of the two terminal lugs is fitted into the lug insertion slot  1142  of the lug fixing boss part  114 , and is electrically connected to the leg part  122  of the terminal plate  12  inserted in the corresponding terminal insertion slot  1111 . 
         [0044]    The three lugs each having one end portion fixed in this manner to each of the lug fixing boss parts  114  are bent in a predetermined direction toward the lug holding parts  115 . Each lug holding part  115  holds the corresponding lug, and guides the another end portion thereof to a position determined based on the layout of the holes in the PCB. Further, when the snap-fit part is fitted into an engaging hole formed in the PCB, the another end portion of each of the three lugs is electrically connected to a predetermined hole in the PCB. 
         [0045]    Next, the configuration of the push-type and screw-type speaker terminals  100 A and  100 B using such a mounting base  1  is described. 
         [0046]    (1) Push-Type Speaker Terminal  100 A 
         [0047]      FIG. 2  (A) is an external view of the push-type speaker terminal  100 A according to this embodiment, and  FIG. 2  (B) is a cross-sectional view of a mounting part of the push-type connector  2  for the speaker terminal  100 A. 
         [0048]    As illustrated in the figures, the push-type speaker terminal  100 A according to this embodiment includes two push-type connectors  2 , the above-mentioned mounting base  1 , and the nut  4  for fixing each connector  2  to the mounting base  1 . 
         [0049]    The push-type connector  2  used herein includes the metal stud  21 , a cylindrical resin cap  22  pushably placed on one end portion of the stud  21 , an elastic member (not shown), such as a spring, arranged between one end surface of the stud  21  and a top part  221  of the cap  22 , and a latch  23  configured to restrict movement of the cap  22  with respect to the stud  21  to a predetermined range. 
         [0050]    The stud  21  includes a stepped columnar shaft part  211  and the male screw part  212  integrally formed with one end surface of the shaft part  211 . 
         [0051]    The shaft part  211  includes two cylindrical parts having different diameters from each other. Specifically, the shaft part  211  includes a large-diameter portion  2111  and a small-diameter portion  2112  arranged between the large-diameter portion  2111  and the male screw part  212 . The large-diameter portion  2111  functions as a cap holding part  2111  on which the cap  22  is placed. The small-diameter portion  2112  functions as the fixing part  2112  to be press-fitted into the small-diameter portion  11122  of the stepped through hole  1112  of the connector fixing boss part  111  through the through hole  123  of the terminal part  121 . 
         [0052]    On the outer periphery of the cap holding part  2111 , there are formed a latch insertion hole  2113  that passes through the cap holding part  2111  in a radial direction, and a cable insertion hole  2114  that passes through the cap holding part  2111  in a radial direction substantially perpendicular to the direction of the latch insertion hole  2113 . The latch  23  is inserted and fixed in the latch insertion hole  2113  through guide holes  223  (described below) each formed in the axial direction in a side surface of the cap  22  placed on one end portion of the cap holding part  2111 . In this case, both the end portions of the latch  23  protrude from both sides of the latch insertion hole  2113 , and each end portion of the latch  23  is arranged in the guide hole  223  of a cylindrical part  222  of the cap  22 . As a result, the cap  22  slides in an axial direction of the cap holding part  2111  over the range that the latch  23  moves within the guide hole  223 . Consequently, a user can align the position of a cable insertion port  224  (described below) formed in a side surface of the cap  22  with the cable insertion hole  2114  of the cap holding part  2111  by pushing the cap  22 . 
         [0053]    On an outer peripheral surface of the fixing part  2112 , the flat surface  2115  for stopping rotation is formed in the axial direction of the fixing part  2112  at a position in a predetermined positional relationship with the cable insertion hole  2114 . The flat surface  2115  positions both openings of the cable insertion hole  2114  of the cap holding part  2111  to face the cable insertion ports  1121  of the cover part  112 , and prevents the stud  21  from rotating with respect to the housing body  110 , by coming into surface contact with the flat surface  11123  formed on the inner periphery of the small-diameter portion  11122  of the stepped through hole  1112  of the connector fixing boss part  111 . Further, the fixing part  2112  is formed so as to be shorter than the thickness of the connector fixing boss part  111 . As a result, when the fixing part  2112  is press-fitted into the small-diameter portion  11122  of the stepped through hole  1112  of the connector fixing boss part  111  until the terminal part  121  is sandwiched between a step surface formed between the cap holding part  2111  and the fixing part  2112  and the front surface on the large-diameter portion  11121  side of the connector fixing boss part  111 , the male screw part  212  protrudes on the back surface side of the housing body  110 . 
         [0054]    The cap  22  integrally includes the cylindrical part  222  into which the cap holding part  2111  of the stud  21  is inserted, and the top part  221  blocking one end of the cylindrical part  222 . An elastic member, such as a spring, is received in the top part  221 . When the cap  22  is pushed onto the one end portion of the cap holding part  2111  of the stud  21 , the elastic member is compressed by the top part  221  and one end surface of the cap holding part  2111 , and the cap  22  is pushed back by the restoring force of the elastic member. 
         [0055]    The cylindrical part  222  includes the two guide holes  223  defining the movement range of the latch  23  and the cable insertion port  224 . The two guide holes  223 , which are each formed along the axial direction of the cap  22 , are elongated holes facing each other. Both end portions of the latch  23  are arranged on the inner side of the two guide holes  223 . As a result, the movement of the latch  23  is restricted to a predetermined range. The cable insertion port  224  is formed at a position that passes above the cable insertion hole  2114  of the cap holding part  2111  when the cap  22  slides across the movable range of the latch  23 . 
         [0056]    The push-type connector  2  as described above is mounted to the mounting base  1  as follows. 
         [0057]    The flat portion  2115  formed on the outer peripheral surface of the small-diameter portion  2112  of the stud  21  is caused to face the flat surface  11123  side formed on the inner periphery of the small-diameter portion  11122  of the stepped through hole  1112  of the connector fixing boss part  111 , and the stud  21  protruding from the cap  22  is inserted into the stepped through hole  1112  of the connector fixing boss part  111  on the inner side of the cover part  112  through the through hole  123  of the terminal part  121 . Further, the fixing part  2112  is press-fitted into the small-diameter portion  11122  of the stepped through hole  1112  of the connector fixing boss part  111  until the terminal part  121  is sandwiched between the step surface formed between the cap holding part  2111  of the stud  21  and the fixing part  2112  and the front surface on the large-diameter portion  11121  side of the stepped through hole  1112  of the connector fixing boss part  111 . In this case, because the flat portion  2115  formed on the outer periphery of the small-diameter portion  2112  of the stud  21  comes into surface contact with the flat surface  11123  formed on the inner periphery of the small-diameter portion  11122  of the stepped through hole  1112  of the connector fixing boss part  111 , both openings of the cable insertion hole  2114  of the cap holding part  2111  are positioned facing the cable insertion ports  1121  of the cover part  112 , and rotation of the stud  21  with respect to the housing is prevented. 
         [0058]    The male screwpart  212  of the stud  21  is caused to protrude on the back surface side of the housing body  110  from the stepped through hole  1112  of the connector fixing boss part  111  by press-fitting the fixing part  2112  into the small-diameter portion  11122  of the stepped through hole  1112  of the connector fixing boss part  111 . When the nut  4  is fastened onto the male screw part  212 , the stud  21  is in secure close contact with the terminal part  121 , and the push-type connector  2  is fixed to the housing body  110  in a posture in which both openings of the cable insertion hole  2114  of the cap holding part  2111  face the cable insertion ports  1121  of the cover part  112 . 
         [0059]    In this state, except for an exposed area from the cable insertion ports  1121  of the cover part  112 , the stud  21  protruding from the cap  22  is covered by the cover part  112  and the cap  22 . As a result, when connecting a cable, the stud  21 , which is a hot metal part, can be more reliably prevented from coming into contact with the terminal part of the connection cable, such as an HDMI (trademark) cable and a USB cable. 
         [0060]    (2) Screw-Type Speaker Terminal  100 B 
         [0061]      FIG. 3(A)  is an external view of the screw-type speaker terminal  100 B according to this embodiment, and  FIG. 3(B)  is a cross-sectional view of a mounting part of the screw-type connector  3  for the speaker terminal  100 B. 
         [0062]    As illustrated in the figures, the screw-type speaker terminal  100 B according to this embodiment includes two screw-type connectors  3 , the above-mentioned mounting base  1 , and the nut  5  for moving each connector  3  in the axial direction. 
         [0063]    The screw-type connector  3  used herein includes a metal stud  31  and a resin knob  32  covering an outer peripheral surface of the stud  31 . 
         [0064]    The stud  31  includes a shaft part  311  having a banana plug insertion port  313  formed on one end surface thereof, and a male screw part  312  integrally formed with another end surface of the shaft part  311 . 
         [0065]    The knob  32  has a stepped cylindrical shape covering the outer peripheral surface of the shaft part  311 . Specifically, the knob  32  includes a small-diameter portion  321  having an outer diameter that is smaller than the inner diameter of the cover part  112 , and a large-diameter portion  322  positioned on the banana plug insertion port  313  side with respect to the small-diameter portion  321 . One end surface of the shaft part  311  (banana plug insertion port  313 ) is exposed from an end portion of the large-diameter portion  322  of the knob  32 , and another end surface of the shaft part  311  and the male screw part  312  protrude from an end portion of the small-diameter portion  321  of the knob  32 . 
         [0066]    The screw-type connector  3  as described above is mounted to the mounting base  1  as follows. 
         [0067]    In this case, after the nut  5  that moves the screw part  312  of the connector  3  in the axial direction is fitted into the large-diameter portion  11121  of the stepped through hole  1112  of the connector fixing boss part  111 , the terminal part  121  is fixed to an upper surface of the connector fixing boss part  111 . 
         [0068]    The male screw part  312  protruding from the small-diameter portion  321  of the knob  32  is screwed into the nut  5  in the large-diameter portion  11121  of the stepped through hole  1112  of the connector fixing boss part  111  through the through hole  123  of the terminal part  121 . Then, a predetermined position of the male screw part  312  protruding to the back surface side of the housing body  110  from the stepped through hole  1112  of the connector fixing boss part  111  is crimped to prevent the male screw part  312  from slipping out from the stepped through hole  1112  of the connector fixing boss part  111 . As a result, the screw-type connector  3  is fixed to the housing body  110  in a posture in which another end surface of the shaft part  311  faces the terminal part  121 . 
         [0069]    In this state, when the user rotates the large-diameter portion  322  of the knob  32  in a predetermined direction, the small-diameter portion  321  of the knob  32  is inserted into the cover part  112  due to the rotation of the male screw part  312  with respect to the nut  5 , and the connector  3  is moved in the direction in which the another end surface of the shaft part  311  is moved toward the terminal part  121 . 
         [0070]    Next, the layout of the speaker terminals  100 A or  100 B on the rear panel of the audio device is described. 
         [0071]      FIG. 4  (A) is a diagram for illustrating a partial layout of the speaker terminals  100 A or  100 B on the rear panel  7  of the audio device, and  FIG. 4  (B) is a diagram for illustrating mounting of the speaker terminal  100 A or  100 B to the rear panel  7 . 
         [0072]    As illustrated in  FIG. 4 , two through holes  72  are formed for each audio channel  73  on the rear panel  7  of the audio device. The through holes  72  are arranged in a line in a horizontal direction. 
         [0073]    The speaker terminal  100 A or  100 B of each audio channel connected to the PCB is arranged in the case of the audio device in a posture in which the front surface of the housing body  110  faces the back surface of the rear panel  7  of the audio device. The cover parts  112  of the mounting base  1  and the connectors  2  or  3  of the speaker terminal  100 A or  100 B are inserted from the back surface side of the rear panel  7  of the audio device into the two through holes  72  of the corresponding audio channel, and protrude on the rear panel  7  side of the audio device. 
         [0074]    In this state, the screw  6  inserted into the through hole  71  formed for each audio channel in the rear panel  7  of the audio device is fastened into the screw hole  1141  of the mounting base  1  of the speaker terminal  100 A or  100 B. Asa result, each speaker terminal  100 A or  100 B is fixed to the rear panel  7  of the audio device, and the earth lug is grounded to the case of the audio device. 
         [0075]    The connectors  2  or  3  of the plurality of speaker terminals  100 A or  100 B fixed in this manner to the rear panel  7  of the audio device are arranged in a substantially horizontal line on the rear panel  7  of the audio device. As a result, the cable insertion ports  1121  of the cover part  112  of each speaker terminal  100 A or  100 B are open in an upward direction and in a downward direction, respectively, and hence the upper side of the cable insertion port  1121  is not closed by the connector  2  or  3  of any speaker terminal  100 A or  100 B. Consequently, the user can smoothly insert the core exposed at the tip of the speaker cable from the upper side toward the lower side into the cable insertion port  1121  of the cover part  112  of the intended speaker terminal  100 A or  100 B without interfering with the connector  2  or  3  of another speaker terminal  100 A or  100 B. 
         [0076]    As described above, according to this embodiment, a common mounting base  1  is shared by the push-type speaker terminal  100 A and the screw-type speaker terminal  100 B, and hence any of the push-type and screw-type connectors  2  and  3  may be mounted to the common mounting base  1 . As a result, a common PCB may be shared by the push-type speaker terminal  100 A and the screw-type speaker terminal  100 B. For example, because the push-type and the screw-type connectors  2  and  3  may be used differently for the common mounting base  1 , so-called PCB compatibility can be realized among products having different types of speaker terminals mounted thereon. As a result, the common PCB can be shared regardless of product models, such as intended markets and classes, thereby being capable of reducing production costs. Further, a PCB-compatible design can be realized among different product models, thereby being capable of improving design efficiency. 
         [0077]    Further, in the push-type speaker terminal  100 A, except for an exposed area from the cable insertion ports  1121  of the resin cover part  112 , the stud  21  protruding from the resin cap  22  is protected by the resin cover part  112  and the resin cap  22 . As a result, during cable connection, the stud  21 , which is a hot metal part, can be more reliably prevented from coming into contact with the terminal part of the connection cable, such as an HDMI (trademark) cable and a USB cable. Consequently, reliability is further improved. This is also the case for the screw-type speaker terminal  100 B, in which the hot metal part is protected by the resin knob  32  and the resin cover part  112 . 
         [0078]    Further, for any of the push-type and the screw-type speaker terminals  100 A and  100 B, the cable insertion ports  1121  of the cover part  112  are oriented in a direction perpendicular to the direction of the arrangement of the two connectors  2  or  3 . As a result, for example, when the connectors  2  or  3  of the plurality of speaker terminals  100 A or  100 B are arranged in a horizontal line on the rear panel  7  of the audio device (horizontal layout), the user can smoothly insert the core of the speaker cable from the upper side toward the lower side into the cable insertion port  1121  of the intended speaker terminal  100 A or  100 B without interfering with the connector  2  or  3  of another speaker terminal  100 A or  100 B. Consequently, operability when connecting the cable is improved. 
         [0079]    Note that, in this embodiment, the cable insertion ports  1121  of the cover part  112  are open in the direction perpendicular to the direction of the arrangement of the connectors  2  or  3 . However, the present invention does not need to be configured in this manner. The direction of the cable insertion ports  1121  of the cover part  112  may be appropriately determined based on the layout and the like of the speaker terminals  100 A or  100 B on the rear panel  7  of the audio device, for example. 
         [0080]    In this embodiment, an example is described above in which the present invention is applied to the speaker terminals  100 A and  100 B to be used in an audio device. However, the present invention is not limited to the speaker terminal, and the present invention may be applied to various terminals in which push-type and screw-type connectors coexist. 
       REFERENCE SIGNS LIST 
       [0000]    
       
         
           
               1 : mounting base,  2 : push-type connector,  3 : screw-type connector,  4 ,  5 : nut,  6 : screw,  7 : rear panel,  11 : housing,  12 : terminal plate,  21 : stud,  22 : cap,  23 : latch,  31 : stud,  32 : knob,  71 ,  72 : through hole,  73 : audio channel,  100 A: push-type speaker terminal,  100 B: screw-type speaker terminal,  110 : housing body,  111 : connector fixing boss part,  112 : cover part,  113 : snap-fit part,  114 : lug fixing boss part,  115 : lug holding part,  121 : terminal part,  122 : leg part,  123 : through hole,  124 : locking claw,  211 : shaft part,  212 : male screw part,  221 : top part,  222 : cylindrical part,  224 : cable insertion port,  311 : shaft part,  312 : male screw part,  313 : banana plug insertion port,  321 : small-diameter portion,  322 : large-diameter portion,  1111 : terminal insertion slot,  1112 : stepped through hole,  1113 : groove,  1141 : screw hole,  1121 : cable insertion port,  1142 : lug insertion slot,  1211 : through hole,  2111 : cap holding part,  2112 : fixing part,  2113 : latch insertion hole,  2114 : cable insertion hole,  2115 : flat surface,  11121 : large-diameter portion,  11122 : small-diameter portion,  11123 : flat surface