Patent Publication Number: US-2021167528-A1

Title: Terminal block and air conditioner

Description:
TECHNICAL FIELD 
     The present invention relates to a terminal block and an air conditioner. 
     BACKGROUND 
     Patent Literature 1 discloses a terminal block including a plurality of single-pole units arranged side by side and coupled to one another. 
     As disclosed in Patent Literature 1, the single-pole units are coupled to one another with a laterally longer bolt passing through the single-pole units and a nut into which the bolt is screwed. The terminal block disclosed in Patent Literature 1 has a rail fitting portion formed on its bottom face, and is fixed to the interior of a board in such a manner that a rail on the board is fitted into the rail fitting portion. In other words, the terminal block disclosed in Patent Literature 1 separately includes means for coupling the single-pole units and means for fixing the terminal block to the interior of the board. It is therefore necessary to perform an operation of coupling the single-pole units and an operation of attaching the terminal block to the interior of the board, independently of each other. 
     PATENT LITERATURE 
     
         
         Patent Literature 1: Japanese Unexamined Patent Publication No. 08-171952 
       
    
     SUMMARY 
     One or more embodiments of the present invention provide a terminal block that achieves coupling of a plurality of split bodies making up the terminal block, simultaneously with fixing of the split bodies to a mount member, and an air conditioner that includes the terminal block. 
     (1) A terminal block according to one or more embodiments of the present invention includes: 
     a first split body that includes one or more terminal connection parts and a first coupling portion; 
     a second split body that includes one or more terminal connection parts and a second coupling portion coupled to the first coupling portion; and 
     a coupling member that couples the first coupling portion to the second coupling portion and is configured to fix the first split body and the second split body to a mount member to which the terminal block is mounted. 
     This configuration achieves coupling of the first split body to the second split body simultaneously with fixing of the first split body and the second split body to the mount member. 
     (2) The first coupling portion and the second coupling portion may be positioned with the first coupling portion and the second coupling portion lying on top of each other, and 
     the coupling member is a coupling bolt to be screwed into the mount member, the coupling bolt passing through the first coupling portion and the second coupling portion in a direction in which the first coupling portion and the second coupling portion lie on top of each other. 
     With this configuration, the first coupling portion and the second coupling portion can be both fastened to the mount member with the coupling bolt and fixed to the mount member. It is possible to fix the first split body and the second split body to the mount member while connecting them. 
     (3) The first coupling portion may be couplable to the second coupling portion of a plurality of types of second split bodies having different numbers of poles. 
     This configuration reduces kinds of components for forming a plurality of types of terminal blocks having different numbers of poles. 
     (4) At least one of the first split body or the second split body may have a detent portion restricting rotation of the terminal block about the coupling member. 
     With this configuration, the terminal block is stably mounted to the mount member. 
     (5) A plurality of types of the terminal blocks having different numbers of poles may have a common relative positional relationship between the coupling member and the detent portion. 
     With this configuration, a plurality of types of the terminal blocks are mounted to the mount member having one set of a portion to which the coupling member is attached and a portion on which the detent portion acts. 
     (6) In the terminal block as recited in (3), the first split body may have a detent portion restricting rotation of the terminal block about the coupling member. 
     With this configuration, a plurality of types of the terminal blocks are mounted to the mount member having one set of a portion to which the coupling member is attached and a portion on which the detent portion acts. 
     (7) The detent portion may be a protrusion configured to engage with the mount member. 
     This configuration simplifies a structure of the detent portion. 
     (8) The first coupling portion and the second coupling portion may engage with each other against movements of the first coupling portion and second coupling portion away from each other. 
     With this configuration, the first split body is coupled to the second split body more firmly. 
     (9) Each of the first split body and the second split body may have an accommodation space in which a terminal connected to each terminal connection part is entirely accommodated. 
     This configuration avoids contact between adjacent terminals connected to the terminal connection part of each split body, and therefore eliminates a necessity to prepare, for example, a protection covering for avoiding the contact between the adjacent terminals. 
     (10) An air conditioner according to one or more embodiments of the present invention includes the terminal block as recited in any one of (1) to (9). 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a plan view of a three-pole terminal block according to one or more embodiments. 
         FIG. 2  is a bottom view of the terminal block illustrated in  FIG. 1 . 
         FIG. 3  is a fragmentary view in the direction of arrow A in  FIG. 1 . 
         FIG. 4  is a fragmentary view in the direction of arrow B in  FIG. 1 . 
         FIG. 5  is a sectional view taken along line C-C in  FIG. 1 . 
         FIG. 6  is a sectional view taken along line D-D in  FIG. 1 . 
         FIG. 7  is a bottom view of a state in which a first split body and a second split body of the terminal block are separated from each other. 
         FIG. 8  is a perspective view of a first coupling portion of the first split body and a second coupling portion of the second split body. 
         FIG. 9  is a plan view of a four-pole terminal block according to one or more embodiments. 
         FIG. 10  is a bottom view of the terminal block illustrated in  FIG. 9 . 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, embodiments of a terminal block will be described in detail with reference to the accompanying drawings. 
       FIG. 1  is a plan view of a three-pole terminal block according to one or more embodiments.  FIG. 2  is a bottom view of the terminal block. In the following description, for convenience, the lower side, upper side, right side, and left side of  FIG. 1  are respectively defined as the front side, rear side, right side, and left side of the terminal block. 
     A terminal block  1  according to one or more embodiments of the present invention is used for, for example, an air conditioner. Specifically, the terminal block  1  is accommodated in an electric component box disposed in an outdoor unit of an air conditioner. The terminal block  1  is connected to cables Ca for a commercial power source, the cables Ca being drawn into the electric component box from the outside. The terminal block  1  is also connected to cables Cb for feeding electric power to loads, such as electric equipment, in the outdoor unit. The terminal block  1  has an upper face covered with a plate-shaped cover  50  detachably attached thereto. 
     The terminal block  1  includes three terminal connection parts  12 . Each of the terminal connection parts  12  includes a primary-side connection part  12   a  and secondary-side connection parts  12   b . The primary-side connection parts  12   a  are disposed on the front side of the terminal block  1 . The secondary-side connection parts  12   b  are disposed on the rear side of the terminal block  1 . The three primary-side connection parts  12   a  are respectively connected to, for example, cables Ca for a three-phase power source. Each of the terminal connection parts  12  includes two secondary-side connection parts  12   b  connected to the primary-side connection part  12   a  in parallel. The secondary-side connection parts  12   b  are respectively connected to cables Cb for loads. 
     The terminal block  1  includes a first split body  21  and a second split body  22 . The terminal block  1  is made up of the first split body  21  and the second split body  22  that are juxtaposed in the left-right direction and are coupled together. The first split body  21  includes two of the three terminal connection parts  12 . The second split body  22  includes the remaining one of the three terminal connection parts  12 . In the terminal block  1 , accordingly, the first split body  21  and the second split body  22  are coupled together to make up the three terminal connection parts  12 . 
       FIG. 3  is a fragmentary view in the direction of arrow A in  FIG. 1 .  FIG. 4  is a fragmentary view in the direction of arrow B in  FIG. 1 .  FIG. 5  is a sectional view taken along line C-C in  FIG. 1 .  FIG. 6  is a sectional view taken along line D-D in  FIG. 1 . 
     The first split body  21  includes a main body  24 , a terminal plate  25 , connection bolts  26 , and connection nuts  27 . The main body  24  is made of a synthetic resin material. For example, the main body  24  is formed by molding with a synthetic resin material into which glass fiber is mixed for enhancing flame retardancy. 
     As illustrated in  FIG. 1 , the main body  24  has three lengthwise walls  24   a  and two widthwise walls  24   b . The three lengthwise walls  24   a  are arranged to extend in the front-rear direction, and are spaced apart from one another in parallel in the left-right direction. The three lengthwise walls  24   a  define two accommodation spaces S for accommodating terminals Ta and Tb of the cables Ca and Cb connected to the two terminal connection parts  12 . 
     As illustrated in  FIGS. 1 and 5 , the two widthwise walls  24   b  divide each accommodation space S into a primary-side region Sa where the terminal Ta connected to the primary-side connection part  12   a  is disposed, and a secondary-side region Sb where the terminals Tb connected to the secondary-side connection parts  12   b  are disposed. 
     The terminal plate  25  is a plate-shaped member made of a conductor such as metal. The terminal plate  25  is disposed in the accommodation spaces S. The terminal plate  25  is located below the widthwise walls  24   b . The terminal plate  25  extends to the primary-side regions Sa and the secondary-side regions Sb. The terminal plate  25  has insertion holes into which the connection bolts  26  are inserted, the insertion holes being opened at the primary-side regions Sa and the secondary-side regions Sb. 
     The connection bolts  26  are respectively inserted from above into the insertion holes in the terminal plate  25 . The connection bolts  26  have lower ends respectively screwed into the connection nuts  27  located below the terminal plate  25 . The connection nuts  27  are respectively held by holding portions  24   c  formed on the main body  24 . The terminals Ta and Tb, such as ring terminals, of the cables Ca and Cb are respectively connected to the terminal plate  25  with the connection bolts  26 . The terminals Ta and Tb connected to the terminal plate  25  with the connection bolts  26  are entirely accommodated in the accommodation spaces S (i.e., the primary-side regions Sa and the secondary-side regions Sb), respectively. 
     As illustrated in  FIG. 1 , the second split body  22  includes a main body  29 , a terminal plate  25 , connection bolts  26 , and connection nuts. The main body  29  is made of a synthetic resin material as in the main body  24  of the first split body  21 . For example, the main body  29  is made of a synthetic resin material into which glass fiber is mixed for enhancing flame retardancy. 
     As illustrated in  FIG. 1 , the main body  29  has two lengthwise walls  29   a  and one widthwise wall  29   b . The two lengthwise walls  29   a  are spaced apart from each other in parallel in the left-right direction. The two lengthwise walls  29   a  define an accommodation space S for accommodating the terminals Ta and Tb of the cables Ca and Cb connected to the one terminal connection part  12 . 
     The widthwise wall  29   b  divides the accommodation space S into a primary-side region Sa where the terminal Ta connected to the primary-side connection part  12   a  is disposed, and a secondary-side region Sb where the terminals Tb connected to the secondary-side connection parts  12   b  are disposed. 
     The terminal plate  25 , connection bolts  26 , and connection nuts of the second split body  22  are identical in configuration to the terminal plate  25 , connection bolts  26 , and connection nuts  27  of the first split body  21 . 
     As illustrated in  FIG. 2 , the first split body  21  has a first coupling portion  31  formed on its side face adjacent to the second split body  22  (i.e., its left side face in  FIG. 2 ), the first coupling portion  31  protruding toward the second split body  22 . The second split body  22  has a second coupling portion  32  formed on its side face adjacent to the first split body  21  (i.e., its right side face in  FIG. 2 ), the second coupling portion  32  protruding toward the first split body  21 . The first coupling portion  31  and the second coupling portion  32  are located between the first split body  21  and the second split body  22  at a substantial center of the terminal block  1  in the front-rear direction. 
       FIG. 7  is a bottom view of a state in which the first split body  21  and second split body  22  of the terminal block  1  are separated from each other.  FIG. 8  is a perspective view of the first coupling portion  31  of the first split body  21  and the second coupling portion  32  of the second split body  22 . 
     The first coupling portion  31  is formed at a height that is equal to or less than a half height of the first split body  21 . The first coupling portion  31  has an upper plate  31   a , a pair of side plates  31   b , and a pair of engagement claws  31   c . The upper plate  31   a  has a rectangular shape as seen from above in plan view. The upper plate  31   a  has an insertion hole  31   d  into which a coupling bolt (a coupling member)  33  for coupling the first coupling portion  31  to the second coupling portion  32  is inserted. 
     The pair of side plates  31   b  respectively extend downward from a front edge and a rear edge of the upper plate  31   a . Each of the side plates  31   b  has a rectangular shape in front view. The upper plate  31   a  and the pair of side plates  31   b  form a gate-shaped frame opened downward. 
     The pair of engagement claws  31   c  are respectively formed on distal ends of the side plates  31   b . The first engagement claw  31   c  on the first side plate  31   b  extends toward the second side plate  31   b . The second engagement claw  31   c  on the second side plate  31   b  extends toward the first side plate  31   b . A space between the pair of engagement claws  31   c  is defined as an opening  31   e  through which the second coupling portion  32  is inserted. 
     As illustrated in  FIGS. 6 and 8 , the first coupling portion  31  has a guide portion  34  for guiding the coupling bolt  33  to the insertion hole  31   d , the guide portion  34  being formed on the upper plate  31   a . The guide portion  34  has a guide groove  34   a  formed in a semicircular shape and located to surround the insertion hole  31   d . When the coupling bolt  33  is inserted along the guide groove  34   a , the coupling bolt  33  is inserted into the insertion hole  31   d  with ease. 
     The second coupling portion  32  having a block shape is formed at a height that is equal to or less than a half height of the second split body  22 . The second coupling portion  32  has tapered faces  32   a  chamfered diagonally and respectively formed on front and rear sides of its leading end face. The second coupling portion  32  also has engagement grooves  32   b  respectively formed on front and rear faces of its proximal portion, the engagement grooves  32   b  having a length equal to the height of the second coupling portion  32 . The second coupling portion  32  also has an insertion hole  32   c  into which the coupling bolt  33  is inserted, the insertion hole  32   c  being a through hole extending in the upper-lower direction. 
     The second coupling portion  32  is inserted into the first coupling portion  31  from the lower side of the first coupling portion  31 . As illustrated in  FIG. 2 , moreover, the engagement claws  31   c  of the first coupling portion  31  are inserted into the engagement grooves  32   b  in the second coupling portion  32 . As illustrated in  FIG. 6 , then, the coupling bolt  33  is inserted from above into the insertion hole  31   d  in the upper plate  31   a  of the first coupling portion  31  and the insertion hole  32   c  in the second coupling portion  32 . The coupling bolt  33  has a distal end screwed into a nut (an internal thread portion)  101  provided on a mount board (a mount member)  100 , to which the terminal block  1  is mounted, in the electric component box. Therefore, the first coupling portion  31  and the second coupling portion  32  are both fastened to the mount board  100  with the coupling bolt  33 . In other words, the coupling bolt  33  has a function of coupling the first coupling portion  31  to the second coupling portion  32 , and a function as a fixing bolt (a fixing member) for fixing the first split body  21  and the second split body  22  to the mount board  100  in the electric component box. The internal thread portion  101  may be a threaded hole directly formed in the mount board  100 , in place of a nut. 
     The first split body  21  and the second split body  22  are not separated from each other in the left-right direction in such a manner that the engagement claws  31   c  of the first coupling portion  31  are inserted into the engagement grooves  32   b  in the second coupling portion  32 . The first coupling portion  31  and the second coupling portion  32  engage with each other against movements of the first split body  21  and second split body  22  away from each other. In addition, the second coupling portion  32  is held between the pair of side plates  31   b  of the first coupling portion  31 . When the second coupling portion  32  is inserted into the first coupling portion  31 , the pair of side plates  31   b  and the pair of engagement claws  31   c  position the second coupling portion  32 , so that the insertion hole  31   d  in the first coupling portion  31  is aligned over the insertion hole  32   c  in the second coupling portion  32 . 
     As illustrated in  FIG. 1 , the main body  24  of the first split body  21  has ridges  24   d  respectively formed on front and rear ends of its left side face, the ridges  24   d  protruding toward the second split body  22 . The main body  29  of the second split body  22  has ridges  29   d  respectively formed on front and rear ends of its right side face, the ridges  29   d  protruding toward the first split body  21 . When the first split body  21  is coupled to the second split body  22 , distal ends of the ridges  24   d  on the first split body  21  are abutted against distal ends of the ridges  29   d  on the second split body  22 . 
     As illustrated in  FIGS. 2 and 3 , the main body  24  of the first split body  21  has a protrusion  24   e  protruding from its bottom face. In one or more embodiments, the protrusion  24   e  has a columnar shape. The protrusion  24   e  is located in the vicinity of the right side face of the first split body  21 , the right side face being farthest from the second split body  22 . In addition, the protrusion  24   e  is located near the front side of the first split body  21 . As illustrated in  FIG. 4 , the protrusion  24   e  is inserted into an engagement hole  102  formed in the mount board  100 , to which the terminal block  1  is fixed, in the electric component box. The protrusion  24   e  is inserted into the engagement hole  102  to engage with the mount board  100 . The protrusion  24   e  functions as a detent portion that restricts rotation of the terminal block  1  about the coupling bolt  33 . 
     As described above, the terminal block  1  includes: the first split body  21  having the two terminal connection parts  12  and the first coupling portion  31 ; the second split body  22  having the one terminal connection part  12  and the second coupling portion  32  coupled to the first coupling portion  31 ; and the coupling bolt  33  coupling the first coupling portion  31  to the second coupling portion  32 , the coupling bolt  33  being configured to fix the first split body  21  and the second split body  22  to the mount board  100  to which the terminal block  1  is mounted. Specifically, the coupling bolt  33  couples the first coupling portion  31  to the second coupling portion  32  and, additionally, serves as the fixing bolt (the fixing member) for fixing the first split body  21  and the second split body  22  to the mount board  100 . With this configuration, the first split body  21  and the second split body  22  are fixed to the mount board  100  with the coupling bolt  33  for coupling the first split body  21  to the second split body  22 . This configuration therefore achieves the operation of coupling the first split body  21  to the second split body  22  simultaneously with the operation of fixing the first split body  21  and the second split body  22  to the mount board  100 . This configuration also simplifies a coupling structure for coupling the first split body  21  to the second split body  22  and a fixing structure for fixing the first split body  21  and the second split body  22  to the mount board  100 . 
     The upper plate  31   a  of the first coupling portion  31  and the second coupling portion  32  vertically lie on top of each other (i.e., the upper plate  31   a  of the first coupling portion  31  vertically overlaps the second coupling portion  32 ). In addition, the coupling bolt  33  is screwed into the mount board  100  with the coupling bolt  33  passing through the first coupling portion  31  and the second coupling portion  32  in the direction in which the upper plate  31   a  of the first coupling portion  31  and the second coupling portion  32  lie on top of each other. Therefore, the first coupling portion  31  and the second coupling portion  32  can be both fastened to the mount board  100  with the coupling bolt  33 . In addition, the first coupling portion  31  and the second coupling portion  32 , which are coupled together, are fixed to the mount board  100 . 
     The first split body  21  has the detent portion restricting the rotation of the terminal block  1  about the coupling bolt  33 . Therefore, the orientation of the terminal block  1  is kept even when the terminal block  1  is fixed to the mount board  100  with one coupling bolt  33 . 
     In addition, the detent portion includes the protrusion  24   e  configured to engage with the mount board  100 . Therefore, the orientation of the terminal block  1  is kept with a simple structure. In one or more embodiments, one coupling bolt  33  and one protrusion  24   e  enable mounting of the terminal block  1  to the mount board  100  with a considerably simple configuration. 
     The first coupling portion  31  and the second coupling portion  32  engage with each other against the movements of the first coupling portion  31  and second coupling portion  32  away from each other. Therefore, the first coupling portion  31  and the second coupling portion  32  are firmly coupled together. This configuration therefore suppresses occurrence of wobbling between the first split body  21  and the second split body  22 , and also suppresses occurrence of unstable coupling of the first split body  21  to the second split body  22 . The wobbling between the first split body  21  and the second split body  22  is also suppressed with the second coupling portion  32  held between the pair of side plates  31   b  of the first coupling portion  31 . 
     Each of the first split body  21  and the second split body  22  has the accommodation space S in which the terminals Ta and Tb connected to each terminal connection part  12  are entirely accommodated. This configuration therefore avoids contact between the terminals Ta and Tb of the adjacent cables Ca and Cb connected to each terminal connection part  12 . This configuration therefore eliminates a necessity to cover the terminals Ta and Tb using, for example, an insulating tape, and simplifies wiring work. 
     The terminal block  1  according to one or more embodiments is made up of the two split bodies  21  and  22  coupled together. Therefore, the main bodies  24  and  29  of the split bodies  21  and  22  are made smaller as much as possible as compared with a case where the terminal block  1  is made up of a single member instead of the main bodies  24  and  29 . Therefore, in the case where each of the main bodies  24  and  29  is formed by molding with a synthetic resin material, the synthetic resin material favorably flows into the die. In addition, the main bodies  24  and  29  thus molded are less prone to become deformed in such a manner that the cooling rate is made uniform as much as possible. This configuration therefore enhances moldability of the synthetic resin material into the split bodies  21  and  22 . The glass fiber-containing synthetic resin material is particularly poor in fluidity into the die; therefore, the terminal block  1  made up of the two split bodies  21  and  22  is particularly effective. 
     In the terminal block  1 , the mounting position of the coupling bolt  33  and the position of the protrusion  24   e  are located within a plane projection area of the terminal block  1 . This configuration reduces the width of the terminal block  1  in the front-rear direction or the width of the terminal block  1  in the left-right direction as compared with a case where the coupling bolt  33  and the protrusion  24   e  protrude from the terminal block  1 . 
       FIG. 9  is a plan view of a four-pole terminal block  2  according to one or more embodiments.  FIG. 10  is a bottom view of the terminal block  2 . 
     The terminal block  2  according to one or more embodiments includes four terminal connection parts  12 . For example, in the terminal block  2 , cables Ca of a three-phase power source including a neutral conductor are connected to primary-side connection parts  12   a  of the terminal connection portion  12 . As in the case of the previously described embodiments, cables Cb for feeding electric power to loads in an outdoor unit are connected to secondary-side connection parts  12   b  of the terminal connection parts  12 . 
     The terminal block  2  includes a first split body  21  and a second split body  42 . Specifically, the terminal block  2  is made up of the first split body  21  and the second split body  42  coupled together. The first split body  21  includes two of the four terminal connection parts  12 . The second split body  42  includes the remaining two of the four terminal connection parts  12 . 
     The first split body  21  is identical to the first split body  21  in the previously described embodiments. Therefore, the three-pole terminal block  1  and the four-pole terminal block  2  include the same first split body  21 . In the following description, the terminal block  1  is also referred to as a first terminal block  1 , and the terminal block  2  is also referred to as a second terminal block  2 . 
     The second split body  42  of the second terminal block  2  is different in number of poles from the second split body  22  of the first terminal block  1 . Specifically, a main body  49  of the second split body  42  has three lengthwise walls  49   a  arranged to extend in parallel in the front-rear direction. The three lengthwise walls  49   a  define accommodation spaces S for terminals Ta and Tb of the cables Ca and Cb connected to the two terminal connection parts  12 . The main body  49  of the second split body  42  also has two widthwise walls  49   b  that divide each accommodation space S into a primary-side region Sa and a secondary-side region Sb. The other configurations of the second split body  42  are similar to those of the second split body  22  of the first terminal block  1 . 
     The first split body  21  is couplable to each of a plurality of types of second split bodies  22  and  42  having different numbers of poles. Therefore, by combining one type of the first split body  21  and each of a plurality of types of the second split bodies  22 ,  42 , it is possible to manufacture a plurality of types of terminal blocks  1  and  2  having different numbers of poles. The terminal blocks  1  and  2  that are different in type from each other include the same first split body  21 . This configuration therefore reduces kinds of components, resulting in manufacturing cost reduction. 
     In addition, the first terminal block  1  and the second terminal block  2  have a common relative positional relationship between the coupling bolt  33  inserted into the insertion holes  31   d  and  32   c  in the first and second coupling portions  31  and  32  and the protrusion  24   e  serving as the detent portion. As illustrated in  FIGS. 2 and 10 , specifically, the first terminal block  1  and the second terminal block  2  are identical to each other in regard to a distance d 1  in the front-rear direction between the protrusion  24   e  and the insertion hole  32   c  corresponding to the insertion hole  31   d  of the first coupling portion  31  and a distance d 2  in the left-right direction between the protrusion  24   e  and the insertion hole  32   c . Accordingly, the mount board  100  to which the terminal block  1  or  2  is fixed has the nut  101  and the engagement hole  102  respectively located in accordance with the position of the coupling bolt  33  and the position of the protrusion  24   e . Using the nut  101  and the engagement hole  102 , both the first terminal block  1  and the second terminal block  2  are mountable to the mount board  100 . It is therefore sufficient for the mount board  100  to have one set of the nut  101  and the engagement hole  102  that are in a predetermined relative positional relationship. This configuration simplifies the structure of the mount board  100 . 
     The present invention is not limited to the foregoing exemplary description, and all changes that fall within metes and bounds of the claims, or equivalence such metes and bounds thereof are therefore intended to be embraced by the claims. 
     For example, the first split body  21  that makes up each of the terminal blocks  1  and  2  may include one terminal connection part  12  or may include three or more terminal connection parts  12 . In addition, each of the second split bodies  22  and  42  that respectively make up the terminal blocks  1  and  2  may include three or more terminal connection parts  12 . 
     Each of the second split bodies  22  and  42  may have the detent portion. In this case, the terminal blocks  1  and  2  may have a common relative positional relationship between the coupling bolt  33  (the insertion hole  32   c  in the second coupling portion  32 ) and the protrusion  24   e  serving as the detent portion even when the number of poles in each of the second split bodies  22  and  42  changes. With this configuration, by providing one set of the nut  101  and the engagement hole  102  on the mount board  100  side, each of a plurality of types of terminal blocks  1  and  2  having different numbers of poles can be mounted on the mount board  100 . 
     The first split body  21  may have two or more first coupling portions  31 . In addition, each of the second split bodies  22  and  42  may have two or more second coupling portions  32 . For example, a plurality of sets of the first coupling portion  31  and the second coupling portion  32  which are arranged in the front-rear direction may be provided between the first split body  21  and the second split body. In this case, the first split body  21  is coupled to the second split body  22  or  42  with two or more coupling bolts  33 . In addition, the first split body  21  and the second split body  22  or  42  are fixed to the mount board  100 . This configuration also restricts rotation of each of the terminal blocks  1  and  2  even when each of the terminal blocks  1  and  2  is not provided with the protrusion  24   e  serving as the detent portion. In other words, one of the coupling bolts  33  serves as the detent portion. 
     The coupling member for coupling the first split body  21  to the second split body  22  or  42  may be any member such as a rivet in addition to the coupling bolt  33 . The shape of the protrusion  24   e  serving as the detent portion may be, for example, a prismatic shape or a hook shape in addition to the cylindrical shape. Alternatively, the detent portion may be a hole with which a protrusion on the mount board  100  engages. 
     In each terminal connection part  12 , two or more terminals Ta may be connected to the primary-side connection part  12   a  with the terminals Ta lying on top of each other. In addition, two or more terminals Tb may be connected to each secondary-side connection part  12   b  with the terminals Tb lying on top of each other. 
     In the foregoing embodiments, for convenience, the front-rear direction and the left-right direction are defined based on the illustration in  FIG. 1 . However, these directions are not limited. For example, the directions may be changed in accordance with a form in use. For example, in a case where the mount board  100  is disposed upright (in a case where the mount board  100  is oriented in the upper-lower direction), the front-rear direction or the left-right direction illustrated in  FIG. 1  is replaced with the upper-lower direction. 
     Each of the terminal blocks  1  and  2  according to one or more embodiments of the present invention is mountable to any electric product in addition to an electric component box of an air conditioner. 
     Although the disclosure has been described with respect to only a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that various other embodiments may be devised without departing from the scope of the present invention. Accordingly, the scope of the invention should be limited only by the attached claims. 
     REFERENCE SIGNS LIST 
     
         
         
           
               1 : TERMINAL BLOCK 
               2 : TERMINAL BLOCK 
               12 : TERMINAL CONNECTION PART 
               21 : FIRST SPLIT BODY 
               22 : SECOND SPLIT BODY 
               24   e : PROTRUSION (DETENT PORTION) 
               31 : FIRST COUPLING PORTION 
               32 : SECOND COUPLING PORTION 
               33 : COUPLING BOLT 
               42 : SECOND SPLIT BODY 
               100 : MOUNT BOARD (MOUNT MEMBER) 
             S: ACCOMMODATION SPACE 
             Ta: TERMINAL 
             Tb: TERMINAL