JP2017199474A - Terminal board with current sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a size of a terminal board with a current sensor by effectively arranging the current sensor.SOLUTION: A terminal board 10 with a current sensor, comprises: an insulation base 12; a flat state conductive fitting 14 that is attached and fixed to the insulation base 12, includes two terminal parts 50 and 52 in which each wiring is connected to a wire connection screw 54, and forms an electric current path between the two terminal parts 50 and 52; a magnetic control member 60 that includes an extension part 64 that is extended to a direction orthogonal to the direction connecting both the two terminal parts 50 and 52 on a back surface side between the two terminal parts 50 and 52 of the conductive fitting 14, and collects a magnetic field caused by passing through a current to the conductive fitting 14; an insulation member 62 that is integrally attached to the conductive fitting 14 while being insulated a magnetic field control member 60 from the conductive fitting 14; and a current sensor 82 that is arranged on a front surface side between the two terminal part s 50 and 52 of the conductive fitting 14, and detects a passing current on the basis of the magnetic field collected by the magnetic field control member 60.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a terminal block with a current sensor.

  Conventionally, a terminal block with a current sensor provided with a current sensor is known (see, for example, Patent Documents 1 and 2). The terminal block with a current sensor includes an insulating base, a conductive metal fitting, and a current sensor.

  In the terminal block with a current sensor described in Patent Document 1, the conductive metal fitting includes two terminal portions to which wiring is connected using terminal screws, and a flat plate is formed so as to form a current path between the two terminal portions. It is formed in a shape. The current sensor detects a current flowing through the current path by detecting a magnetic field generated when the current flows through the current path of the conductive metal fitting. This current sensor is disposed at a position away from the conductive metal fitting on the lower side of the back surface of the conductive metal fitting.

  Moreover, in the terminal block with a current sensor described in Patent Document 2, the base has a plurality of stepped terminal surfaces, and the conductive metal fitting is provided independently on each terminal surface of the base. Each is formed in a flat plate shape so as to form a current path. In addition, the current sensor is provided corresponding to each of the upper conductive bracket and the lower conductive bracket, and by detecting a magnetic field generated when a current flows in the current path of each conductive bracket, The current flowing through the current path is detected. The current sensor corresponding to the upper conductive member is disposed in a space above the lower terminal surface of the base and upstream or downstream of the conductive member with respect to the upper terminal surface of the base. In addition, the current sensor corresponding to the lower conductive member is disposed in a space below (on the back side) the upper terminal surface of the base and downstream or upstream of the conductive metal with respect to the lower terminal surface of the base. ing.

JP 2012-13492 A JP 2009-140680 A

  However, as described above, if the terminal block current sensor is disposed below the back side of the conductive metal fitting or disposed above or below the terminal surface of the base, the height of the entire terminal block is assumed. This increases the size of the terminal block.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a terminal block with a current sensor that can reduce the size of the terminal block by efficiently arranging the current sensor. And

  The terminal block with a current sensor of the present invention, which has been made to solve the above problems, includes an insulating base and two terminal portions that are fixedly attached to the insulating base and are connected to each other by terminal screws. A flat conductive member that forms a current path between the two terminal parts, and a first direction that connects the two terminal parts to each other on the back side between the two terminal parts of the conductive metal part. And a magnetic field control member that collects a magnetic field generated by the current flowing through the conductive metal fitting, and that insulates the magnetic field control member from the conductive metal fitting. The flow-through current based on the magnetic field collected by the magnetic field control member disposed on the surface side between the two terminal portions of the conductive metal fitting and the insulating member integrally attached to the conductive metal piece Detect current sensor And it is characterized in that it comprises.

  According to this configuration, it is not necessary to dispose the current sensor below the terminal portion of the conductive metal fitting, and the space on the surface of the conductive metal fitting can be efficiently used for the arrangement of the current sensor. The height of the terminal block with the current sensor can be suppressed, and the terminal block with the current sensor can be downsized.

  Moreover, the terminal block with a current sensor is characterized in that the insulating member includes a mounting portion formed on a surface side of the conductive metal fitting, and the current sensor is mounted on the mounting portion. To do.

  According to this configuration, since the current sensor is placed on the surface side of the conductive metal fitting via the insulating member, the wiring connected to the external terminal of the current sensor can be facilitated, and the wiring is attached. And can be easily removed.

    Moreover, the terminal block with a current sensor is characterized in that the arrangement position of the current sensor is directly below the position where the name plate for the terminal block is attached.

  According to this configuration, it is not necessary to provide the space necessary for arranging the current sensor separately, and the space on the surface of the conductive metal fitting can be efficiently used for arranging the current sensor. The arrangement of the current sensor can be made efficient.

  In the terminal block with a current sensor, the insulating member is a member that is insert-molded with respect to the magnetic field control member and the conductive metal fitting.

  According to this configuration, it is possible to ensure the insulation between the magnetic field control member and the conductive metal fitting through the insert-molded insulating member.

  Further, the terminal block with a current sensor is formed in a U-shape in which the magnetic field control member has the extending portion and a standing portion standing from both ends of the extending portion so as to surround the conductive metal fitting. It is characterized by being a member.

  According to this configuration, the magnetic field control member can be used to easily collect the magnetic field generated when a current flows through the current path of the conductive metal fitting, and the magnetic field detection accuracy can be increased.

  The terminal block with a current sensor is characterized in that the magnetic field control member is a member formed in a flat plate shape having the extended portion.

  According to this configuration, it is possible to collect a magnetic field generated when a current flows through the current path of the conductive metal fitting using a simple flat plate-shaped magnetic field control member.

It is a top view of the terminal block with a current sensor which concerns on one Embodiment of this invention. It is a front view of the terminal block with a current sensor of this embodiment. It is a bottom view of the terminal block with a current sensor of this embodiment. It is a right view of the terminal block with a current sensor of this embodiment. It is a left view of the terminal block with a current sensor of this embodiment. It is VI-VI sectional drawing of the terminal block with a current sensor shown in FIG. It is VII-VII sectional drawing of the terminal block with a current sensor shown in FIG. It is a perspective view of the principal part containing the electrically-conductive metal fitting with which the terminal block with a current sensor of this embodiment is provided, and a current sensor. It is a top view of the principal part containing the electrically-conductive metal fitting with which the terminal block with a current sensor of this embodiment is provided, and a current sensor. It is a front view of the principal part containing the electrically-conductive metal fitting with which the terminal block with a current sensor of this embodiment is provided, and a current sensor. It is a bottom view of the principal part containing the electrically-conductive metal fitting with which the terminal block with a current sensor of this embodiment is provided, and a current sensor. It is a right view of the principal part containing the electrically-conductive metal fitting with which the terminal block with a current sensor of this embodiment is equipped, and a current sensor. It is a left view of the principal part containing the electrically-conductive metal fitting with which the terminal block with a current sensor of this embodiment is provided, and a current sensor. It is a XIV-XIV cross section of the principal part shown in FIG. It is XV-XV sectional drawing of the principal part shown in FIG. It is a perspective view of the electrically-conductive metal fitting with which the terminal block with a current sensor of this embodiment is provided. It is a perspective view of the magnetic field control member with which the terminal block with a current sensor of this embodiment is provided. It is a perspective view of the magnetic field control member with which the terminal block with a current sensor of the modification of the present invention is provided.

  Hereinafter, specific embodiments of a terminal block with a current sensor according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a top view of a terminal block 10 with a current sensor according to an embodiment of the present invention. FIG. 2 shows a front view of the terminal block 10 with a current sensor of the present embodiment. FIG. 3 shows a bottom view of the terminal block 10 with the current sensor of the present embodiment. FIG. 4 shows a right side view of the terminal block 10 with current sensor of the present embodiment. FIG. 5 shows a left side view of the terminal block 10 with a current sensor of the present embodiment. 6 shows a VI-VI cross-sectional view of the terminal block 10 with a current sensor shown in FIG. FIG. 7 is a sectional view taken along line VII-VII of the terminal block 10 with the current sensor shown in FIG.

  FIG. 8 is a perspective view of a main part including the conductive metal fitting and the current sensor provided in the terminal block 10 with the current sensor of the present embodiment. FIG. 9 is a top view of a main part including the conductive metal fitting and the current sensor provided in the terminal block 10 with the current sensor of the present embodiment. FIG. 10: shows the front view of the principal part containing the electrically-conductive metal fitting and current sensor with which the terminal block 10 with a current sensor of this embodiment is provided. FIG. 11 is a bottom view of the main part including the conductive metal fitting and the current sensor provided in the terminal block 10 with the current sensor of the present embodiment. FIG. 12: shows the right view of the principal part containing the electrically-conductive metal fitting and current sensor with which the terminal block 10 with a current sensor of this embodiment is provided. FIG. 13: shows the left view of the principal part containing the electrically-conductive metal fitting and current sensor with which the terminal block 10 with a current sensor of this embodiment is provided.

  FIG. 14 is a cross-sectional view of the main part XIV-XIV shown in FIG. 15 shows an XV-XV cross-sectional view of the main part shown in FIG. FIG. 16 is a perspective view of a conductive metal fitting provided in the terminal block 10 with the current sensor according to the present embodiment. FIG. 17 is a perspective view of the magnetic field control member provided in the terminal block with current sensor 10 of the present embodiment.

  A terminal block with a current sensor (hereinafter simply referred to as a terminal block) 10 according to the present embodiment is a relay terminal block that connects an input side wiring and an output side wiring to each other. The terminal block 10 is installed, for example, on a switchboard that supplies power to an electric device such as a motor. The terminal block 10 is one in which a current sensor for detecting a current flowing in the wiring is integrally attached to the terminal block body. The terminal block 10 includes an insulating base 12 having an insulating property and a conductive metal fitting 14 having a conductive property.

  The insulating base 12 is a pedestal to which the conductive metal fitting 14 is attached and fixed. The insulating base 12 is made of a resin having insulating properties and heat resistance. The material of the insulating base 12 is, for example, PBT (polybutylene terephthalate). The insulating base 12 includes an intermediate base 16 and two side bases 18 and 20. The intermediate base 16 is a part sandwiched between the two side bases 18 and 20. A plurality of intermediate bases 16 may be provided. In this case, the plurality of intermediate bases 16 may be arranged in series between the side base 18 and the side base 20. . Hereinafter, in the present embodiment, two intermediate bases 16 are provided. The side bases 18 and 20 are parts located at both ends of the insulating base 12.

  Each intermediate base 16 is formed in a shape to which the conductive metal fitting 14 can be attached and fixed. Each intermediate base 16 has a standing wall 22 for insulating the attached conductive metal fitting 14 from the adjacent intermediate base 16 or side base 18 side. Specifically, one end of each of the intermediate bases 16 in the direction in which the plurality of intermediate bases 16 are arranged (hereinafter referred to as the side-by-side direction X) is opened to insert and attach the conductive metal fitting 14. However, the other end in the juxtaposed direction X is closed by the standing wall 22. The standing wall 22 is provided to insulate the conductive metal fitting 14 attached to the adjacent intermediate base 16 or side base 18 while supporting the conductive metal fitting 14 attached thereto.

  The side base 18 is formed in a shape that allows the conductive metal fitting 14 to be attached and fixed, and is formed in a thick block shape so that the terminal block 10 can be attached and fixed to a switchboard or the like. The side base 18 has a standing wall 28 for supporting the attached conductive metal fitting 14. Specifically, one end of the side base 18 in the side-by-side direction X is open to insert and attach the conductive metal fitting 14, but the other end in the side-by-side direction X is the standing wall 28. Closed by The standing wall 28 is provided to support the attached conductive metal fitting 14.

  Each of the intermediate base 16 and the side base 18 has three chambers partitioned by partition walls 24 and 26 in a direction orthogonal to the juxtaposed direction X (hereinafter referred to as the extending direction Y). ing. Of these three chambers, the chambers at both ends in the extending direction Y are used to connect external wirings, and open on the outside in the extending direction. Further, an intermediate chamber sandwiched between the chambers on both sides, that is, between the partition walls 24 and 26 is a space necessary for accommodating a later-described current sensor.

  On the upper part of the above-described intermediate chamber (specifically, the end of the direction perpendicular to the above-described parallel direction X and the extending direction Y (hereinafter referred to as the height direction Z)) is a name plate (see FIG. (Not shown) is provided with a plate insertion portion 29 into which a sheet can be inserted. The name plate inserted into the board insertion portion 29 is a board on which the name of the external wiring connected in the chambers on both sides, the name of the connection destination of the external wiring, etc. are written or printed for the terminal block 10. is there. If the board insertion part 29 is formed so that the height of the part corresponding to an intermediate | middle chamber of the standing walls 22 and 28 may become low compared with the height of the part corresponding to the chamber of both sides, for example. Good.

  Unlike the intermediate base 16 and the side base 18, the side base 20 is not formed in a shape to which the conductive metal fitting 14 can be attached and fixed. The side base 20 is formed in a thick block shape so that the terminal block 10 can be attached and fixed to a switchboard or the like. The side base 20 has a standing wall 30 for supporting the conductive metal fitting 14 attached to the adjacent intermediate base 16.

  The side bases 18 and 20 are each provided with one mounting hole 32 vacated in the height direction Z. The mounting hole 32 is a hole into which a bolt (not shown) necessary for mounting and fixing the terminal block 10 to a switchboard or the like is inserted. The terminal block 10 is fixedly attached to a switchboard or the like by inserting bolts into the mounting holes 32 of the side bases 18 and 20 sandwiching the plurality of intermediate bases 16.

  The intermediate base 16 and the side bases 18 and 20 are each provided with an insertion hole 34 vacated in the juxtaposed direction X. Further, the side base 18 is provided with a nut accommodation hole 36 communicating with the insertion hole 34 of the side base 18. The insertion holes 34 of the intermediate base 16 and the side bases 18 and 20 are provided at positions where the intermediate base 16, the side base 18 and the side base 20 communicate with each other. A plurality (two in this embodiment) of the insertion holes 34 of the intermediate base 16, the insertion holes 34 of the side base 18, and the insertion holes 34 of the side base 20 are provided, and the same number is provided. Yes. Further, the nut accommodation holes 36 are provided in a number corresponding to the insertion holes 34 of the side base 18.

  The insertion hole 34 is a hole into which a connection shaft 38 necessary for connecting the intermediate base 16, the side base 18, and the side base 20 to each other is inserted. The nut accommodation hole 36 is a hole in which the nut 40 fastened to the connecting shaft 38 inserted into the insertion hole 34 is accommodated. The insulating base 12 is connected to the intermediate base 16 and the side base by fastening the connecting shaft 38 inserted into the insertion hole 34 from the side base 20 side to the nut 40 received in the nut receiving hole 36. 18 and the side base 20 are formed in an integrated state.

  The conductive metal fitting 14 is a conductive plate that is fixedly attached to the insulating base 12. The conductive metal fitting 14 is made of a metal such as copper, brass, or aluminum. The conductive metal fittings 14 are provided for each of the intermediate base 16 and the side base 18 of the insulating base 12 and are provided in a number corresponding to the total number of the intermediate base 16 and the side base 18. . Specifically, three conductive metal fittings 14 are provided when three intermediate bases 16 and three side bases 18 are provided. Each conductive metal fitting 14 is a plate-like member formed in a flat plate shape, and is formed in a substantially rectangular shape. The conductive metal fittings 14 are attached and fixed to the intermediate base 16 and the side base 18 one by one.

  Each conductive metal fitting 14 is provided with two terminal portions 50 and 52. The terminal portions 50 and 52 are parts to which external wiring that is input-side wiring or output-side wiring is connected. The terminal portions 50 and 52 are provided at both end portions in the longitudinal direction (that is, the extending direction Y) of each conductive metal fitting 14. The terminal portion 50 is a part that is accommodated in a chamber on one end side of the intermediate base 16 and the side base 18 of the insulating base 12. The terminal portion 52 is a part that is accommodated in a chamber on the other end side of the intermediate base 16 and the side base 18 of the insulating base 12. Between the two terminal portions 50 and 52 of the conductive metal fitting 14, a space in which a current sensor and the like to be described later can be arranged is formed. This space is a part that is accommodated in a middle chamber between the intermediate base 16 and the side base 18 of the insulating base 12.

  Each terminal portion 50, 52 is formed with a screw hole 56 through which the connection screw 54 is inserted. The connection screw 54 is a terminal screw that is attached to the terminal portions 50 and 52 and connects external wiring to the conductive metal fitting 14. On the inner wall forming the screw hole 56, a female screw to which the connection screw 54 is screwed is formed. The terminal portions 50 and 52 are connected to the external wiring by being screwed together with the connection screw 54 inserted into the screw hole 56 and sandwiching the conductor portion of the external wiring. Each conductive metal fitting 14 forms a current path between the two terminal portions 50 and 52 at both end portions so that current flows from one external wiring side to the other external wiring side. In each conductive metal fitting 14, external wiring is connected to terminal portions 50, 52 at both end portions by connecting screws 54, so that the two external wirings are connected to each other through a current path.

  A notch 58 is formed between the two terminal portions 50 and 52 at both end portions of each conductive metal fitting 14 (that is, an intermediate portion) so as to be narrower than other portions (for example, end portions). Yes. The notches 58 are provided on both sides in the lateral direction of the conductive metal fitting 14 (that is, the parallel arrangement direction X). The notch 58 is formed by integrally attaching a magnetic field control member, which will be described later, for collecting a magnetic field generated by current flowing through the conductive metal fitting 14 to the conductive metal fitting 14, and the conductive metal fitting to which the magnetic field control member is attached. 14 is a part necessary for efficiently arranging and fixing 14 on the insulating base 12.

  The terminal block 10 further includes a magnetic field control member 60 and an insulating member 62. The magnetic field control member 60 is a core member that collects a magnetic field generated when a current flows through the current path of the conductive metal fitting 14. The magnetic field control member 60 is made of a magnetic material such as nickel, iron oxide, or chromium oxide. The magnetic field control member 60 is formed in a U shape so as to surround the conductive metal fitting 14, and has an extending portion 64 and two standing portions 66 and 68.

  The extending portion 64 is disposed on the back surface side of the conductive metal fitting 14 (specifically, the position between the two terminal portions 50 and 52 of the conductive metal fitting 14). The extending portion 64 is a direction in which the two terminal portions 50 and 52 are connected to each other on the back surface side between the two terminal portions 50 and 52 at both ends of the conductive metal fitting 14 (hereinafter referred to as a current flow direction). It is the site | part extended in the direction (henceforth an orthogonal direction) orthogonal to.

  The current flow direction coincides with the extending direction Y in the insulating base 12. Further, this orthogonal direction coincides with the parallel direction X in the insulating base 12. Hereinafter, the current flow direction Y and the orthogonal direction X will be referred to. The extending portion 64 has a length in the orthogonal direction X that is longer than the width of the intermediate portion where the cutout 58 of the conductive metal fitting 14 is provided, and the end portion of the conductive fitting 14 where the cutout 58 is not provided. It is formed to be shorter than the width.

  The standing portions 66 and 68 are portions provided corresponding to both sides of the extending portion 64 in the orthogonal direction X so as to sandwich the extending portion 64, and are integrally formed with the extending portion 64. The standing portions 66 and 68 are erected upward from both ends in the orthogonal direction X of the extending portion 64. The standing portions 66 and 68 are provided in order to easily collect a magnetic field generated when a current flows through the current path of the conductive metal fitting 14 and to increase the magnetic field detection accuracy. Each of the extending portion 64 and the standing portions 66 and 68 of the magnetic field control member 60 is formed such that the width in the current flow direction Y is smaller than the width of the notch 58 in the current flow direction Y.

  The insulating member 62 is a member that insulates the magnetic field control member 60 from the conductive metal fitting 14, and is interposed between the magnetic field control member 60 and the conductive metal fitting 14. The insulating member 62 is made of a resin material such as PBT or polycarbonate. The insulating member 62 has a shape for integrally attaching the magnetic field control member 60 to the conductive metal fitting 14. The insulating member 62 is formed in a shape that ensures an insulating distance (that is, a creepage distance) between the conductive metal fitting 14 and the magnetic field control member 60. The insulating member 62 is insert-molded with respect to the conductive metal fitting 14 and the magnetic field control member 60. As long as the insulating member 62 can secure the insulation between the magnetic field control member 60 and the conductive metal fitting 14, a plurality of separated members are used so that the magnetic field control member 60 is integrated with the conductive metal fitting 14. It may be a combination.

  The insulating member 62 includes a notch fitting portion 70, a back surface portion 72, a placement portion 74, and a cover portion 76. The notch fitting part 70 is a part that fits into the notch 58 of the conductive metal fitting 14 and is a part that stands in the height direction Z. The notch fitting portions 70 are provided on both sides of the insulating member 62 in the orthogonal direction X. The notch fitting portion 70 is formed with insertion holes 78 and 80 into which the standing portions 66 and 68 of the magnetic field control member 60 are inserted.

  The back surface portion 72 is a part formed on the back surface side of the conductive metal fitting 14 (specifically, a position between the two terminal portions 50 and 52 of the conductive metal fitting 14), and is an extended portion of the magnetic field control member 60. 64 and a portion interposed between the back surface of the conductive metal fitting 14. The mounting portion 74 is a portion formed on the surface side of the conductive metal fitting 14 (specifically, a position between the two terminal portions 50 and 52 of the conductive metal fitting 14), and a current sensor described later is placed thereon. It is a part to be done. Moreover, the cover part 76 is a part which covers the extension part 64 of the magnetic field control member 60 from below, and is a member for preventing the magnetic field control member 60 from being exposed to the outside.

  The terminal block 10 also includes a current sensor 82. The current sensor 82 is a sensor that detects a current flowing between external wires connected to the two terminal portions 50 and 52 of the conductive metal fitting 14. The current sensor 82 is provided for each conductive metal fitting 14 arranged in the parallel arrangement direction X, and is provided in a number corresponding to the number of the conductive metal fittings 14. Each current sensor 82 is installed through an insulating member 62 at an intermediate portion between the two terminal portions 50 and 52 at both end portions of the corresponding conductive metal fitting 14. Each current sensor 82 is accommodated in a middle chamber between the intermediate base 16 and the side base 18 of the insulating base 12, and is mounted on the mounting portion 74 of the insulating member 62.

  The current sensor 82 has a magnetoresistive element 86 disposed on the substrate 84. The current sensor 82 may include a filter circuit such as a low-pass filter. The magnetoresistive element 86 is an element that outputs a signal corresponding to a magnetic field (magnetic flux). The current sensor 82 includes a positive power supply terminal (for example, +5 volts), a negative power supply terminal (for example, a ground terminal), an output terminal, a positive measurement terminal, and a negative measurement terminal. The magnetoresistive element 86 is interposed between the positive side measurement terminal and the negative side measurement terminal. The positive side measurement terminal and the negative side measurement terminal are terminals for measuring the magnetic field generated by the current flowing through the conductive metal fitting 14. Specifically, the magnetic field collected by the magnetic field control member 60 is a magnetic field. This is a terminal for measurement.

  In the terminal block 10 having the above-described configuration, the insulating member 62 is a member for integrally attaching the magnetic field control member 60 to the plate-shaped conductive metal fitting 14, and the mounting portion 74 of the insulating member 62 is electrically conductive. It is formed on the surface side of the metal fitting 14. In addition, the current sensor 82 is mounted on the mounting portion 74 of the insulating member 62 at an intermediate portion between the two terminal portions 50 and 52 at both end portions of the conductive metal fitting 14. The intermediate base 16 and the side base 18 are accommodated in intermediate chambers. A name plate of the terminal block 10 is attached to the plate insertion portion 29 in the upper part of the intermediate chamber.

  In such a structure, the magnetic field control member 60 can be integrally attached to the flat conductive member 14 using the insulating member 62. For this reason, after the magnetic field control member 60 is assembled to the conductive metal fitting 14, the magnetic field control member 60 can be easily handled. Moreover, since the deviation from the desired state of the positional relationship between the magnetic field control member 60 and the conductive metal fitting 14 can be eliminated, the magnetic field detection accuracy by the current sensor 82 can be increased.

  In the above structure, the current sensor 82 is mounted on the mounting portion 74 formed on the surface side of the conductive metal fitting 14 of the insulating member 62, and the name plate is attached to the plate insertion portion 29. It can be accommodated in an intermediate chamber of the base 12. Therefore, the current sensor 82 can be easily assembled and, after the current sensor 82 is assembled, the wiring connected to the external terminal of the current sensor 82 can be facilitated. Attachment work and removal work can be easily performed.

  In addition, since the current sensor 82 is disposed at an intermediate portion between the two terminal portions 50 and 52 of the conductive metal fitting 14, it is not necessary to dispose the current sensor 82 below or above the terminal portions 50 and 52. The space on the surface of the metal fitting 14 can be efficiently used for arranging the current sensor 82, and the height of the terminal block 10 can be suppressed. Furthermore, since the current sensor 82 is arranged immediately below the position where the name plate of the terminal block 10 is attached, it is not necessary to provide a separate space necessary for arranging the current sensor 82. The space on the surface can be efficiently used for the arrangement of the current sensor 82, and the arrangement of the current sensor 82 can be made efficient. Therefore, according to the terminal block 10 of the present embodiment, the terminal block 10 can be reduced in size by efficiently arranging the current sensor 82.

  By the way, in the above embodiment, the connection screw 54 is electrically connected to the “terminal screw” described in the claims, and the current flow direction Y of the conductive metal fitting 14 is electrically connected to the “first direction” described in the claims. The orthogonal direction X of the metal fitting 14 corresponds to the “second direction” described in the claims.

  As is clear from the above detailed description, the terminal block 10 with current sensor of the present embodiment is fixedly attached to the insulating base 12 and the insulating base 12, and the wirings are connected by the connection screws 54. On the back surface side between the two terminal portions 50 and 52 of the flat plate-like conductive metal fitting 14 including two terminal portions 50 and 52 and forming a current path between the two terminal portions 50 and 52. A magnetic field generated by a current flowing through the conductive metal fitting 14 having an extending portion 64 extending in an orthogonal direction X orthogonal to the current flowing direction Y that connects the two terminal portions 50 and 52 to each other is collected. A magnetic field control member 60 that is magnetized, an insulating member 62 that is integrally attached to the conductive fitting 14 while insulating the magnetic field control member 60 from the conductive fitting 14, and a surface side between the two terminal portions 50 and 52 of the conductive fitting 14 Placed in It is, it is an electric current sensor 82 for detecting the flow current based on the magnetic field which is the magnetic field concentrating in a magnetic field control member 60, comprising: a.

  According to this configuration, it is not necessary to dispose the current sensor 82 below the terminal portions 50 and 52 of the conductive metal fitting 14, so that the space on the surface of the conductive metal fitting 14 can be efficiently arranged. Therefore, the height of the terminal block 10 with the current sensor can be suppressed, and the terminal block 10 with the current sensor can be downsized.

  Further, the terminal block with current sensor 10 includes that the insulating member 62 includes a mounting portion 74 formed on the surface side of the conductive metal fitting 14, and the current sensor 82 is mounted on the mounting portion 74. It is a feature. According to this configuration, since the current sensor 82 is mounted on the surface side of the conductive metal fitting 14 via the insulating member 62, the wiring connected to the external terminal of the current sensor 82 can be facilitated. Wiring can be easily attached or removed.

  Moreover, the terminal block 10 with a current sensor is characterized in that the arrangement position of the current sensor 82 is directly below the position where the terminal board name plate is attached. According to this configuration, it is not necessary to separately provide a space necessary for arranging the current sensor 82, and the space on the surface of the conductive metal fitting 14 is efficiently used for arranging the current sensor 82. The arrangement of the current sensor 82 can be made efficient.

  Further, the terminal block 10 with a current sensor is characterized in that the insulating member 62 is a member that is insert-molded with respect to the magnetic field control member 60 and the conductive metal fitting 14. According to this configuration, the insulation between the magnetic field control member 60 and the conductive metal fitting 14 can be ensured through the insulating member 62 that is insert-molded.

  Moreover, the terminal block 10 with a current sensor has a U-shape in which the magnetic field control member 60 has an extending portion 64 and standing portions 66 and 68 standing from both ends of the extending portion 64 so as to surround the conductive metal fitting 14. It is the member currently formed in this. According to this configuration, the magnetic field control member 60 can be used to easily collect the magnetic field generated when a current flows through the current path of the conductive metal fitting 14, and the magnetic field detection accuracy can be increased.

  The present invention is not limited to the above-described embodiments and modifications, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above embodiment, the magnetic field control member 60 is a member formed in a U shape having the extended portion 64 and the standing portions 66 and 68. However, the present invention is not limited to this, and if the magnetic field control member 60 can collect a magnetic field generated when a current flows in the current path of the conductive metal fitting 14, the standing portions 66 and 68 are arranged. It may be a member formed in the shape of a flat plate having the extended portion 64 without any. That is, in the terminal block 10 with the current sensor, the magnetic field control member 60 may be a member formed in a flat plate shape having the extending portion 64 as shown in FIG. This modification is suitable when the current flowing through the conductive metal fitting 14 is a large current (for example, 200 amps or more). This is because current detection errors are small at large currents. According to the configuration of this modification, it is possible to collect a magnetic field generated when a current flows in the current path of the conductive metal fitting using a simple flat plate-shaped magnetic field control member.

  Moreover, said embodiment is an example of the terminal block 10 with a current sensor provided with the current sensor 82. FIG. However, the terminal block with current sensor 10 may further include a thermistor that detects the temperature of the conductive metal fitting 14. This thermistor is attached to the conductive metal fitting 14. That is, the terminal block 10 with a current sensor may include a thermistor that detects the temperature and is attached to the conductive metal fitting 14. According to this configuration, it is possible to detect the heat generation of the conductive metal fitting using the thermistor and further detect the looseness of the connection screw 54 and the like.

DESCRIPTION OF SYMBOLS 10 Terminal block with a current sensor 12 Insulation base 14 Conductive metal fittings 50, 52 Terminal part 54 Connection screw 60 Magnetic field control member 62 Insulation member 64 Extension part 66, 68 Standing part 70 Notch fitting part 72 Back part 74 Mounting part 76 Cover part 82 Current sensor 86 Magnetoresistive element

Claims (6)

An insulation base;
A plate-shaped conductive metal fitting that is fixedly attached to the insulating base and includes two terminal portions each connected by a terminal screw, and that forms a current path between the two terminal portions;
The conductive metal fitting has an extending portion extending in a second direction orthogonal to a first direction connecting the two terminal portions to each other on a back surface side between the two terminal portions of the conductive metal fitting. A magnetic field control member that collects a magnetic field generated by the flow of current;
An insulating member that is integrally attached to the conductive fitting while insulating the magnetic field control member from the conductive fitting;
A current sensor that is disposed on the surface side between the two terminal portions of the conductive metal fitting and detects the flow current based on a magnetic field collected by the magnetic field control member;
A terminal block with a current sensor. The insulating member includes a mounting portion formed on the surface side of the conductive metal fitting,
The terminal block with a current sensor according to claim 1, wherein the current sensor is placed on the placement portion.   The terminal block with a current sensor according to claim 1 or 2, wherein the position of the current sensor is directly below the position where the name plate for the terminal block is attached.   4. The terminal block with a current sensor according to claim 1, wherein the insulating member is a member that is insert-molded with respect to the magnetic field control member and the conductive metal fitting. 5.   The magnetic field control member is a member formed in a U shape having the extended portion and a standing portion standing from both ends of the extended portion so as to surround the conductive metal fitting. The terminal block with a current sensor according to any one of claims 1 to 4.   6. The terminal block with a current sensor according to claim 1, wherein the magnetic field control member is a member formed in a flat plate shape having the extending portion.

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