JP2018071707A - Attaching/detaching structure, current sensor, and distribution panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attaching/detaching structure capable of easily removing a second body connected to a first body from the first body, and a current sensor including the attaching/detaching structure and a distribution panel including the current sensor.SOLUTION: A first housing 41 includes at least one fitting hole 462 in a first fitting section 460. A second housing 42 includes at least one projection 470 with the same number as the fitting hole 462 in a second fitting section 44. The projection 470 is fitted into the fitting hole 462. An elastic member applies elastic force to at least one of the first housing 41 and the second housing 42. The elastic force makes the first housing 41 relatively away from the second housing 42. At least one of the first fitting section 460 and the second fitting section 44 is an elastic section having elasticity. An action section 54 applies force to the elastic section when the force is applied to an operation section 51, elastically deforms the elastic section, and releases fitting between the projection 470 and the fitting hole 462.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an attachment / detachment structure, a current sensor, and a distribution board, and more particularly to an attachment / detachment structure that couples a first body and a second body to each other, a current sensor including the attachment / detachment structure, and a distribution board including the current sensor. .

  As a conventional example, a current sensor described in Patent Document 1 is illustrated. The current sensor described in Patent Document 1 includes an annular magnetic core divided into two. The magnetic core is housed and fixed in the lower housing, the middle housing (first body), and the upper housing (second body). The upper housing and the middle housing are fixed to each other so as to be openable and closable by an engagement portion having a snap-fit structure.

JP 2014-219221 A

  However, the snap-fit structure described in Patent Document 1 has a problem that it is difficult to remove the middle housing that is snap-fit coupled to the upper housing from the upper housing.

  An object of the present invention is to provide a detachable structure in which a second body coupled to a first body can be easily detached from the first body, a current sensor including the detachable structure, and a distribution board including the current sensor. To do.

  In order to solve the above problems, a detachable structure according to one aspect of the present invention includes a first body, a second body, an elastic member, and a release switch. The first body has at least one recess in the first fitting portion. The second body has at least one projection of the same number as the recess in the second fitting portion. The protrusion is fitted into the recess. The elastic member applies an elastic force to at least one of the first body and the second body. The elastic force moves the first body relatively away from the second body. At least one of the first fitting portion and the second fitting portion is an elastic portion having elasticity. The release switch has at least one action part and an operation part. The operation unit applies a force applied to the elastic part by the action part to the action part. When the force is applied to the operation portion, the action portion applies force to the elastic portion, elastically deforms the elastic portion, and releases the fitting between the protrusion and the concave portion.

  The current sensor which concerns on 1 aspect of this invention is equipped with the said attachment / detachment structure, a 1st core, and a 2nd core. The first core is housed inside the first body. The second core is housed inside the second body. The second core forms a closed magnetic path together with the first core. The closed magnetic circuit surrounds a flat conductive member. The elastic member has an elastic force and is disposed between at least one of the first body and the first core and between the second body and the second core. The elastic force moves the first core relatively closer to the second core and moves the first body relatively away from the second body.

  A distribution board according to an aspect of the present invention includes the current sensor and the conductive member.

  In the attachment / detachment structure, the current sensor, and the distribution board according to one aspect of the present invention, the second body coupled to the first body can be easily detached from the first body.

FIG. 1 is a bottom view of a current measuring device including a current sensor according to an embodiment of the present invention with a lower first side portion removed. FIG. 2 is a perspective view of a current measuring device including the current sensor. FIG. 3 is an enlarged view of a main part of the current sensor. FIG. 4 is a perspective view of the second casing in the current sensor. FIG. 5 is a cross-sectional view of the second housing of the current sensor same as above. FIG. 6 is a front view of a distribution board according to an embodiment of the present invention.

  Hereinafter, a detachable structure, a current sensor, and a distribution board according to an embodiment of the present invention will be described with reference to the drawings. An embodiment in which the attachment / detachment structure is applied to a current sensor and a distribution board will be mainly described. Hereinafter, unless otherwise specified, in FIGS. 1 to 5, the current sensor 21 is defined in the vertical direction, the horizontal direction, and the longitudinal direction according to the directions indicated by the arrows. In FIG. 6, the top and bottom and the left and right of the distribution board 1 are defined by the directions indicated by the arrows. In FIG. 6, the front side of the page is defined as the front of the distribution board 1. That is, in a case where a first housing 41 and a second housing 42, which will be described later, are coupled to each other in the current sensor 21, the direction in which the first housing 41 and the second housing 42 are aligned is the left-right direction. The first housing 41 side is the left, and the second housing 42 side is the right. In addition, a direction in which a later-described through-hole 418 passes through the first housing 41 and the second housing 42 is defined as the vertical direction. Further, both the direction in which the first casing 41 and the second casing 42 that are coupled to each other are aligned and the direction in which the through hole 418 passes through the first casing 41 and the second casing 42 are both included. The direction orthogonal to the direction is the front-rear direction.

  As shown in FIG. 6, the distribution board 1 of the present embodiment includes a cabinet 10, a main breaker 14, a plurality (18 in this embodiment) of branch breakers 15, and a plurality (three in this embodiment). Bus conductors 16 and a plurality (three in this embodiment) of current measuring devices 2. The distribution board 1 of the present embodiment has a configuration corresponding to single-phase three-wire wiring. In addition, the wiring system of the distribution board 1 is not limited to a single-phase three-wire system, and may be any wiring system such as a single-phase two-wire system, a three-phase three-wire system, and a three-phase four-wire system.

  The cabinet 10 is formed in a box shape having a rectangular plate-like bottom plate 101 and a peripheral wall 102 protruding from the periphery of the bottom plate 101. Two rail members 103 are attached to the bottom plate 101. The two rail members 103 are formed in a rectangular plate shape that is long in the vertical direction. A first mounting plate 104 and a second mounting plate 105 are fixed to the front surfaces of the two rail members 103. The first mounting plate 104 and the second mounting plate 105 are installed so as to be bridged between the two rail members 103. The second mounting plate 105 is disposed below the first mounting plate 104. A mounting base 106 is fixed to the front surface of the second mounting plate 105. The mounting base 106 is made of, for example, a synthetic resin. As shown in FIG. 1, the mounting base 106 has a plate-like portion 107 and a plurality of flange portions 108. In the present embodiment, two hooks 108 are provided corresponding to each of the three current measuring devices 2, a total of six (only two are shown in FIG. 1). The collar portion 108 protrudes forward from the plate-like portion 107. The flange portion 108 is bent in the vicinity of the protruding end and has an L-shaped cross section.

  As shown in FIG. 6, the main breaker 14 is attached to the front surface of the first attachment plate 104. The plurality of branch breakers 15 are attached to the attachment base 106. The three primary terminals 141 of the main breaker 14 are electrically connected to an AC power source (not shown) via three power lines 142 of L1, L2, and N phases. The three secondary terminals 143 of the main breaker 14 are electrically connected to three bus conductors 16 of L1, L2, and N phases (in FIG. 6, only one is labeled). . The three bus bar conductors 16 are electrically connected to the three power lines 142 on a one-to-one basis. Each of the three bus conductors 16 includes a joint bar 161 directly connected to the main breaker 14 and a conductive bar (conductive member 162) connected to the main breaker 14 via the joint bar 161. Yes. That is, in the present embodiment, as shown in FIG. 1, the distribution board 1 includes three conductive members 162.

  The conductive member 162 is made of a conductive material such as copper. The conductive member 162 is formed in a flat plate shape. The conductive member 162 has a longitudinal direction in the vertical direction, and transmits electric power in the vertical direction. The three conductive members 162 are arranged side by side in the front-rear direction with a space between each other. The three conductive members 162 are arranged in the order of the L1 phase, the N phase, and the L2 phase from the front side.

  As shown in FIG. 6, the plurality of branch breakers 15 are electrically connected to the conductive member 162. The 18 branch breakers 15 are divided into breaker groups G1, G2, and G3. Each of the breaker groups G1, G2, and G3 has six branch breakers 15. In the breaker groups G1, G2, and G3, the breaker group G1 is closest to the main breaker 14, and the breaker group G3 is farthest from the main breaker 14. One of the three current measuring devices 2 is installed between the breaker group G1 and the joint bar 161, and the other one is installed between the breaker group G1 and the breaker group G2. One is installed between the breaker group G2 and the breaker group G3. That is, each of the three current measuring devices 2 flows through the conductive member 162 to the breaker group G1, flows through the conductive member 162 to the breaker group G2, and flows through the conductive member 162 to the breaker group G3. Provided to measure current.

  Each of the plurality of current measuring devices 2 provided in the distribution board 1 includes two current sensors 21 and 22 as shown in FIG. The current sensor 21 measures the current flowing through the L1-phase conductive member 162 and outputs the measurement result to the measuring device 300 (see FIG. 6). The current sensor 22 measures the current flowing through the L2-phase conductive member 162 and outputs the measurement result to the measurement device 300. The measuring device 300 measures the current, power, and amount of power in the breaker groups G1, G2, and G3 (see FIG. 6) using the outputs of the current sensor 21 and the current sensor 22, for example. Hereinafter, matters common to the current sensor 21 and the current sensor 22 will be described with reference to the current sensor 21.

  The current sensor 21 of the present embodiment includes a measurement unit 3 and a detachable structure 9. The measurement unit 3 includes a core 30 and windings 314, 315, and 316. The measuring unit 3 constitutes a current transformer.

  The detachable structure 9 of this embodiment includes a housing 4, an elastic member 200 (see FIG. 5), a release switch 5, and a release switch cover 6. 3 and 4, the second housing 42 is shown in a state in which the release switch cover 6 is disassembled from the second housing 42.

  As shown in FIG. 1, the core 30 includes a first core 31 and a second core 32. The 1st core 31 and the 2nd core 32 are comprised from magnetic bodies, such as a silicon steel plate. The first core 31 and the second core 32 are formed in a U-shaped cross section when viewed in the vertical direction. The first core 31 includes a central piece 311 that is long in the front-rear direction, and a pair of leg pieces 312 that protrude rightward from both ends of the central piece 311 in the front-rear direction. The second core 32 includes a central piece 321 that is long in the front-rear direction and a pair of leg pieces 322 that protrude leftward from both ends of the central piece 321 in the front-rear direction. The first core 31 is disposed to face the second core 32. That is, the tip 313 of the leg piece 312 in the first core 31 faces the tip 323 of the leg piece 322 in the second core 32. The second core 32 forms a closed magnetic path surrounding the flat conductive member 162 together with the first core 31. In the current sensor 21, the closed magnetic circuit surrounds the L1 phase conductive member 162 among the three conductive members 162. The first core 31 is formed longer than the second core 32 in the left-right direction. A dielectric may be sandwiched between the first core 31 and the second core 32. The material of the first core 31 and the second core 32 is not limited to a silicon steel plate, and may be, for example, permalloy or ferrite, amorphous, nanocrystalline alloy, or the like.

  A winding 314 is wound around the leg piece 312 on the front side of the first core 31. The rear leg piece 312 of the first core 31 is partially covered by a cylindrical bobbin 317. The bobbin 317 is formed of an electrically insulating material such as resin. Windings 315 and 316 are wound around the bobbin 317. The windings 314, 315, and 316 are made of an electrically conductive material such as copper. The windings 314, 315, and 316 are electrically connected to each other in series. The windings 314, 315, and 316 are electrically connected to the measuring device 300 (see FIG. 6), and the current corresponding to the current flowing through the L1-phase conductive member 162 measured by the current sensor 21 is measured by the measuring device 300. Output to.

  The housing 4 is formed in a rectangular parallelepiped shape. The housing 4 is made of an electrically insulating material such as resin. The housing 4 includes a first housing 41 (first body) and a second housing 42 (second body). The first housing 41 is coupled to the second housing 42. The first housing 41 can be separated from the second housing 42.

  The first housing 41 includes a first storage portion 410 and four first fitting portions 460 (see FIG. 3; only three are shown in FIG. 3). The first storage part 410 has a main body part 411, a first side part 412 (see FIG. 2), and a second side part 413. FIG. 1 illustrates a state in which the first side portion 412 is removed. The main body 411 is formed in a U-shaped cross section when viewed from the up-down direction. The main body 411 includes a central plate 414 that is long in the front-rear direction, and a pair of leg plates 415 that protrude rightward from both ends of the central plate 414 in the front-rear direction. The second side part 413 is provided so as to cover the upper side of the main body part 411. As shown in FIG. 2, the first side portion 412 is attached to the main body portion 411 so as to cover the lower side of the main body portion 411. The first storage portion 410 is formed in a bottomed cylindrical shape as a whole by the main body portion 411, the first side portion 412, and the second side portion 413. As shown in FIG. 1, the 1st housing | casing 41 accommodates the 1st core 31 in the inside. Furthermore, the first housing 41 holds the substrate 303 therein. The substrate 303 is provided with an amplifier circuit (not shown) that amplifies output signals from the windings 314, 315, and 316. The first side part 412 and the second side part 413 may be formed integrally with the main body part 411, or may be formed separately from the main body part 411 and then attached to the main body part 411. Good.

  Further, the first casing 41 is coupled to the second casing 42, so that the first casing 41 and the second casing 41 in the direction (vertical direction) in which the first side portion 412 and the second side portion 413 are opposed to each other. A through hole 418 that penetrates the housing 42 is formed together with the second housing 42. The first housing 41 is provided with a holding member 419 along the outer edge of the through hole 418. The holding member 419 has a U-shaped cross section when viewed from the top and bottom, and is provided so as to bridge between the first side portion 412 and the second side portion 413. The conductive member 162 passes through the through hole 418. Since the conductive member 162 passes through the through hole 418, the housing 4 is positioned with respect to the conductive member 162. In the facing direction 100, the through hole 418 is longer than the conductive member 162. The facing direction 100 is a direction in which the second housing 42 is positioned with respect to the first housing 41 when a projection 470 (see FIG. 3) described later is fitted in a fitting hole 462 (see FIG. 3) described later. is there. In the present embodiment, the facing direction 100 matches the left-right direction.

  In the current sensor 21, the inside of the first housing 41 is filled with an electrically insulating sealing member such as silicon resin. The first core 31, the windings 314, 315, and 316 and the substrate 303 are positioned inside the current sensor 21 by being sealed with a sealing member. That is, the first core 31, the windings 314, 315, and 316 and the substrate 303 are potted inside the current sensor 21.

  Further, the partition portion 304 protrudes from the second side portion 413. The partition part 304 is formed in a plate shape. The partition part 304 is orthogonal to the second side part 413 and protrudes toward the inside of the first housing 41. Inside the first housing 41, the first core 31 is prevented from contacting the substrate 303 by the partitioning portion 304. In addition, four holding pieces 305 protrude from the second side portion 413. The four holding pieces 305 are orthogonal to the second side portion 413 and protrude toward the inside of the first housing 41. The first core 31 is held by the first housing 41 by being disposed between two holding pieces 305 at one place at two places.

  As shown in FIG. 3, each of the four first fitting portions 460 of the first housing 41 has a plate shape. The first fitting part 460 protrudes from the end (right end) of the first side part 412 and the second side part 413 on the second casing 42 side to the second casing 42 side (right side). The first fitting portion 460 is formed integrally with the first side portion 412 and the second side portion 413. Moreover, the 1st fitting part 460 has the fitting hole 462 which is a through-hole. The fitting hole 462 corresponds to a recess. Here, the term “concave portion” is used to include a hole having a bottom and a groove in addition to the through hole.

  In the first housing 41, the four first fitting portions 460 are provided in four locations, one for each location. That is, the four fitting holes 462 of the four first fitting portions 460 are provided at four locations. Two four first fitting portions 460 are provided in each of the first side portion 412 and the second side portion 413 of the first storage portion 410. In each of the first side portion 412 and the second side portion 413, the two first fitting portions 460 are provided with the through hole 418 interposed therebetween. That is, in each of the first side portion 412 and the second side portion 413, the two first fitting portions 460 are arranged in the direction in which the through hole 418 passes through the first casing 41 and the second casing 42 (vertical direction). ) And the opposing direction 100 (left-right direction). In addition, when the first housing 41 is coupled to the second housing 42, the through hole 418 is the second housing among the fitting hole 462 and the through hole 418 of each first fitting portion 460. The body 42 is provided farther in the facing direction 100 with respect to an end 422 (right end) to be described later.

  The first fitting portion 460 has elasticity. The first fitting portion 460 corresponds to an elastic portion. The first fitting portion 460 is elastically deformed toward the outside of the first storage portion 410 when a force is applied. The first fitting portion 460 includes an action surface 461 (first action surface) at the tip of the second housing 42 side. The action surface 461 is formed such that the corners of the plate-like first fitting portion 460 are chamfered. That is, the action surface 461 is an inclined surface that is inclined with respect to the facing direction 100. The action surface 461 faces the inside of the first housing 41 in the vertical direction. Further, the action surface 461 faces the second housing 42 side (right side) in the left-right direction.

  FIG. 5 illustrates the second housing 42 in the AA cross section of FIG. As shown in FIGS. 4 and 5, the second housing 42 is formed in a U-shaped cross section when viewed in the vertical direction. The second housing 42 has a second storage part 420. The second storage part 420 includes a case part 43 and a second fitting part 44.

  The case part 43 has a pair of cylindrical parts 431, a frame part 432, and a restriction part 433. The case part 43 is formed in a hollow shape. The frame part 432 is formed in a frame shape and includes an opening 435 at the first end 434 (right end). A pair of cylindrical portions 431 protrude from a second end 436 (left end) opposite to the first end 434 in the frame portion 432. Each tubular portion 431 includes an opening 437 at the tip in the direction protruding from the frame portion 432 (leftward). The space inside the case portion 43 is connected from the opening 437 to the opening 435 of the frame portion 432. The second housing 42 is in contact with the first storage portion 410 (see FIG. 1) of the first housing 41 (see FIG. 1) at the ends (left end) of the pair of cylindrical portions 431 on the opening 437 side. In addition, at the second end 436 of the frame portion 432, the space between the pair of cylindrical portions 431 is covered with a plate-like regulating portion 433. The holding member 419 (see FIG. 1) of the first housing 41 is disposed between the pair of cylindrical portions 431. A pair of attachment pieces 438 (only one is shown in FIG. 4) protrudes from the first end 434 of the frame portion 432. The attachment piece 438 is provided with a screw hole 439.

  The second fitting portion 44 includes a bottom portion 441, a cylindrical portion 442, a spring insertion portion 443, a spring hook piece 444, and a bearing 445. The bottom 441 is formed in a rectangular plate shape that is orthogonal to the left-right direction. The bottom portion 441 includes a pair of restriction holes 446 that are through holes, four guide holes 447 (only three are shown in FIG. 4) that are through holes, and a hooking groove 448. The bottom 441 includes the end 422 of the second housing 42. The end 422 is an end of the second casing 42 opposite to the first casing 41 (see FIG. 3) side (left side) in the facing direction 100 (left-right direction). The cylindrical portion 442 protrudes leftward from the vicinity of the periphery of the bottom portion 441. The cylindrical portion 442 includes a pair of screw holes 449 (only one is shown in FIG. 4). The cylindrical portion 442 is coupled to the frame portion 432 of the case portion 43. That is, the case portion 43 and the second fitting portion 44 are coupled to each other by screwing together with the screw hole 439 of the attachment piece 438 of the case portion 43 and the screw hole 449 of the second fitting portion 44. The spring insertion portion 443 is formed in a cylindrical shape, and protrudes from the center of the bottom portion 441 in the same direction as the direction in which the cylindrical portion 442 protrudes from the bottom portion 441 (leftward direction). A spring hooking piece 444 that protrudes from the bottom 441 is located inside the spring insertion portion 443. The spring hooking piece 444 is formed in a cylindrical shape.

  An elastic member 200 is built in the second housing 42. For example, a coil spring is used as the elastic member 200. The elastic member 200 is inserted into the spring insertion portion 443, and a spring hook piece 444 is inserted inside the coil structure.

  The bearing 445 includes a projecting piece 450 and two columnar shaft support portions 451. The protruding piece 450 protrudes from the bottom portion 441 in the direction opposite to the direction in which the cylindrical portion 442 protrudes from the bottom portion 441 (rightward). Of the two shaft support portions 451, one protrudes upward from the protruding piece 450, and the other protrudes downward from the protruding piece 450. The hooking groove 448 is formed at the right front corner of the bottom 441. The hooking groove 448 is provided with a hooking hole 452 that is a through hole.

  The second fitting portion 44 of the second housing 42 further has four protrusions 470 (only two are shown in FIG. 4). That is, the second fitting portion 44 has four protrusions 470 that are the same number as the four fitting holes 462 (see FIG. 3). The four protrusions 470 of the second fitting portion 44 protrude outward from the cylindrical portion 442 of the second storage portion 420 in the vertical direction. As shown in FIGS. 3 and 4, the four protrusions 470 in the second housing 42 are provided in four locations, one for each location. That is, two protrusions 470 are provided on two surfaces 453 and 454 facing each other in the direction (vertical direction) in which the through hole 418 passes through the first housing 41 and the second housing 42 in the second storage portion 420. It is provided one by one. In each of the surfaces 453 and 454, the two protrusions 470 are provided apart from each other. In each of the surfaces 453 and 454, the two protrusions 470 are formed in the direction in which the through hole 418 passes through the first housing 41 and the second housing 42 (up and down direction) and in the facing direction 100 (left and right direction). They are arranged side by side in a direction (front-rear direction) orthogonal to both. When the first housing 41 is coupled to the second housing 42, the through-hole 418 is located with respect to the end 422 (right end) of the second housing 42 among the protrusions 470 and the through-holes 418. Thus, it is provided farther in the facing direction 100.

  In the second fitting portion 44, the protrusion 470 includes an action surface 471 (second action surface) on the first housing 41 side (left side). The action surface 471 is an inclined surface that is inclined with respect to the facing direction 100. The action surface 471 faces the outside of the second housing 42 in the vertical direction. Further, the action surface 471 faces the first housing 41 side (left side) in the left-right direction. By the way, in the bottom portion 441, the guide hole 447 is formed on the side opposite to the first housing 41 side (left side) with respect to the projection 470 (right side of the projection 470). Further, when the protrusion 470 is fitted in the fitting hole 462, the guide hole 447 faces the first fitting portion 460 (elastic portion).

  As shown in FIG. 5, the second housing 42 houses the second core 32 therein. That is, the two leg pieces 322 of the second core 32 respectively correspond to the two cylindrical parts of the second housing 42 on a one-to-one basis, and the distal end part 323 of each leg piece 322 is an opening of the frame part 432. 435 is inserted into the corresponding cylindrical portion 431. Further, the first surface 324 on the leg piece 322 side (left side) of the central piece 321 of the second core 32 is opposed to the restricting portion 433 with a predetermined gap between the first surface 324 and the restricting portion 433. Further, on the second surface 325 on the opposite side (right side) of the second core 32 to the first surface 324, the second fitting portion 44 faces the second core 32, and the elastic member 200 is in contact with the second core 32. Yes.

  As described above, the elastic member 200 is disposed between the second housing 42 and the second core 32 and applies force to the second housing 42 and the second core 32. The elastic member 200 has an elastic force that moves the first core 31 shown in FIG. 1 relatively close to the second core 32 and relatively moves the first housing 41 away from the second housing 42. The elastic member 200 applies the elastic force to the second core 32 and the second housing 42.

  As shown in FIG. 3, the four protrusions 470 of the second housing 42 correspond one-to-one to the four first fitting portions 460 of the first housing 41, and each protrusion 470 corresponds to the corresponding first fitting. It is fitted into the fitting hole 462 of the part 460. FIG. 3 shows a state in which the protrusion 470 is fitted in the fitting hole 462 of the first fitting portion 460.

  Hereinafter, a process in which each protrusion 470 is fitted into the fitting hole 462 of the corresponding first fitting portion 460 will be described. First, the second casing 42 moves from the right side of the first casing 41 to the first casing 41 side (left side). That is, the first housing 41 is relatively close to the second housing 42. Thereby, the action surface 471 of the protrusion 470 contacts the action surface 461 of the first fitting portion 460. The action surface 471 and the action surface 461 are formed to face each other. When the second housing 42 further moves toward the first housing 41, a force is applied from the protrusion 470 to the working surface 461 of the first fitting portion 460 on the working surface 471, and the first fitting portion 460 (elastic portion) ) Is elastically deformed. That is, the first fitting portion 460 bends outward with respect to the first storage portion 410 along the inclination of the working surface 471. Accordingly, the second housing 42 further moves toward the first housing 41, and the protrusion 470 is fitted into the fitting hole 462 of the first fitting portion 460.

  Each projection 470 is coupled to the corresponding first fitting portion 460 by such a so-called snap-fit coupling. The operation of fitting the protrusion 470 into the fitting hole 462 of the first fitting portion 460 is performed by one operation of bringing the first housing 41 relatively close to the second housing 42 into the four protrusions 470 and the four fitting holes 462. Against at the same time. Instead of bringing the second housing 42 closer to the first housing 41, the first housing 41 can be brought closer to the second housing 42 and the protrusion 470 can be fitted into the fitting hole 462.

  By fitting the protrusion 470 into the fitting hole 462, the first housing 41 and the second housing 42 are coupled to each other, so that the first housing 41 is prevented from moving away from the second housing 42 relatively. .

  As shown in FIGS. 4 and 5, the release switch 5 includes an operation part 51, two deformation parts 52, a pair of restriction parts 53, and four action parts 54 (only three are shown in FIG. 4). ,have.

  The release switch 5 is attached to the second housing 42. More specifically, the release switch 5 has an end 422 (right side) opposite to the first case 41 (see FIG. 3) side (left side) in the facing direction 100 (left-right direction) of the second case 42 ( It is attached to the right end. That is, the release switch 5 is provided at the end 422 of the housing 4 (see FIG. 3) in the facing direction 100. Therefore, when the first housing 41 is coupled to the second housing 42, the through-hole 418 is closer to the second housing 42 than the release switch 5 and the through-hole 418 (see FIG. 3). The end 422 is provided farther in the facing direction 100. Further, when the first housing 41 is coupled to the second housing 42, among the release switch 5, the through-hole 418, the projection 470, and the fitting hole 462, the through-hole 418 is formed in the second housing 42. It is farthest in the facing direction 100 with respect to the end 422 of the body 42.

  The operation unit 51 is formed in a rectangular plate shape. The operation unit 51 has an opening 510 at the center. From the periphery of the opening 510, two deformable portions 52 protrude toward the second housing 42 (left side). The two deformation parts 52 have elasticity. Each restricting portion 53 includes a protruding piece 531 and a hooking claw 532. The protruding piece 531 protrudes from the operation unit 51 to the second housing 42 side. The hooking claw 532 is provided at the tip of the protruding piece 531. The protruding piece 531 of the restricting portion 53 is passed through the restricting hole 446 (hole) in the second fitting portion 44 of the second housing 42, and the catching claw 532 of the restricting portion 53 is the periphery of the restricting hole 446 (hole). , It is hooked on the bottom 441 of the second fitting portion 44 of the second housing 42. As a result, the release switch 5 is prevented from being detached from the second housing 42.

  The four action parts 54 protrude toward the second housing 42 from the side opposite to the one surface 511 in the operation part 51. One surface 511 of the operation unit 51 faces the side opposite to the second housing 42 side. That is, the first surface 511 is the right surface of the operation unit 51. The four action portions 54 are passed through the four guide holes 447 in the second housing 42. The action part 54 includes an action surface 541 (release surface) at the tip on the second housing 42 side. The action surface 541 is an inclined surface that is inclined with respect to the facing direction 100 (left-right direction). The action surface 541 faces the outside of the second housing 42 in the vertical direction. Further, the action surface 541 faces the first housing 41 side (left side) in the left-right direction.

  Hereinafter, the basic operation of the release switch 5 will be described. The release switch 5 is pushed to the second housing 42 side (left side) when a force is applied to the one surface 511 in the operation unit 51. When the release switch 5 is pushed toward the second housing 42, the deformable portion 52 eventually comes into contact with the second housing 42, so that the release switch 5 is hardly pushed. When the release switch 5 is further pushed toward the second housing 42, the action portion 54 hits the protrusion 470, and thus the release switch 5 is not pushed further toward the second housing 42.

  Next, an operation in which the release switch 5 releases the fitting between the protrusion 470 and the fitting hole 462 (see FIG. 3) of the first fitting portion 460 (see FIG. 3) will be described. FIG. 3 shows a state in which the protrusion 470 is fitted in the fitting hole 462. When a force is applied to the operation unit 51 and the operation unit 51 is pushed toward the first housing 41 side (left side), the operation surface 541 (release surface) of the operation unit 54 is first as shown in FIG. It contacts the working surface 461 (surface to be released) of the fitting portion 460 (elastic portion). When a force is further applied to the operation unit 51 and the operation unit 51 is pushed toward the first housing 41, the action unit 54 is given a force from the operation unit 51, and the action unit 54 is A force is applied to the action surface 461 of the fitting portion 460. Thereby, the first fitting portion 460 is elastically deformed, and the first fitting portion 460 is bent outward with respect to the first storage portion 410 along the inclination of the working surface 541. Accordingly, the fitting between the protrusion 470 and the first fitting portion 460 is released.

  The above-described operation of releasing the fitting between the protrusion 470 and the fitting hole 462 is performed on the four protrusions 470 and the four fitting holes 462 by a single operation in which the operation unit 51 is pushed toward the second housing 42. Done at the same time. That is, the four action portions 54 of the release switch 5 are simultaneously in contact with the four first fitting portions 460 and apply force to the four first fitting portions 460 simultaneously. When the fitting with the fitting hole 462 is released in each of the four protrusions 470, the second housing 42 is moved to the first by the elastic force of the elastic member 200 (see FIG. 5) acting on the second housing 42. Move in a direction away from the casing 41 (rightward). Accordingly, since the protrusion 470 is separated from the fitting hole 462 of the first fitting part 460, even if the first fitting part 460 returns to the shape before elastically deforming outward with respect to the first storage part 410, the protrusion 470. Is not fitted into the fitting hole 462 of the first fitting portion 460.

  The release switch cover 6 includes a first surface portion 61, a second surface portion 62, a pair of side surfaces 63 (only one is shown in FIG. 3), a shaft portion 64, and a hooking portion 65. Yes. The first surface portion 61, the second surface portion 62, and the pair of side surface portions 63 are each formed in a rectangular plate shape. The second surface portion 62 extends in a direction orthogonal to the first surface portion 61 from one side on the front side of the first surface portion 61. The pair of side surface parts 63 are provided to face each other. The pair of side surface parts 63 are orthogonal to the first surface part 61 and the second surface part 62 and are connected to one side of each of the first surface part 61 and the second surface part 62. The shaft portion 64 is provided on the rear side of the first surface portion 61. The hook portion 65 protrudes leftward from the second surface portion 62. The shaft portion 64 is attached to the two shaft support portions 451 of the second fitting portion 44 of the second housing 42 (see FIG. 1). Further, the hooking portion 65 is hooked in the hooking groove 448 (see FIG. 4) of the second housing 42 and inserted into the hooking hole 452 (see FIG. 4). The release switch cover 6 is attached to the second housing 42 at the shaft portion 64 and the hook portion 65 as described above.

  The release switch cover 6 covers the operation portion 51 of the release switch 5 with a first surface portion 61, a second surface portion 62 and a pair of side surface portions 63. Therefore, the release switch cover 6 prevents the fitting of the protrusion 470 and the fitting hole 462 from being released due to a force applied to the operation unit 51. As shown in FIG. 1, the release switch cover 6 is rotatably attached to the second housing 42 with a shaft portion 64 as an axis. In FIG. 1, the release switch cover 6 of the current sensor 21 is illustrated in a state where it rotates around the shaft portion 64 and does not cover the operation portion 51 of the release switch 5. Thus, the release switch cover 6 can rotate about the shaft portion 64 to expose the operation portion 51 so that a force is applied to the operation portion 51.

  In a state where the release switch cover 6 covers the operation unit 51, the release switch cover 6 is pushed toward the second housing 42 side (left side). Then, the release switch cover 6 applies a force to the second housing 42 without applying a force to the operation unit 51 and pushes the second housing 42 toward the first housing 41 leftward. Accordingly, a force is applied from the protrusion 470 to the action surface 461 of the first fitting portion 460 on the action surface 471 shown in FIG. 3 to elastically deform the first fitting portion 460, and the protrusion 470 is fitted into the first fitting portion 460. It can be fitted into the hole 462. That is, by pressing the release switch cover 6, the second housing 42 is pushed toward the first housing 41, the protrusion 470 is fitted into the fitting hole 462 of the first fitting portion 460, and the first housing 41 is moved to the second housing 41. It can be coupled to the housing 42.

  The operation of fitting the protrusion 470 into the fitting hole 462 of the first fitting portion 460 is to push the release switch cover 6 toward the second housing 42 and bring the first housing 41 relatively closer to the second housing 42 1 The four fitting holes 462 and the four protrusions 470 are simultaneously performed by the operation of the degree. By the way, an operation of applying a force to the operation unit 51 to connect the first housing 41 and the second housing 42, and a force to the release switch cover 6 for removing the first housing 41 from the second housing 42. The operation of adding can be performed from the same side (the side opposite to the first housing 41 side). Therefore, it is easy to secure a space for performing both operations.

  Next, the current sensor 22 will be described. However, the same components as those of the current sensor 21 are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 1 and 2, the current sensor 22 further includes two leg portions 7 and two attachment portions 8. In the current sensor 22, the closed magnetic circuit formed by the core 30 surrounds the L2-phase conductive member 162 of the three conductive members 162. The N-phase conductive member 162 is located between the current sensor 21 and the current sensor 22.

  Each leg 7 is provided behind the second housing 42. That is, the leg portion 7 is attached to the second housing 42. The leg portion 7 has a first side wall 71, a second side wall 72, and a third side wall 73. The first side wall 71, the second side wall 72, and the third side wall 73 are orthogonal to the rear surface 4401 of the second fitting portion 44 and protrude rearward from the rear surface 4401. The first side wall 71 is orthogonal to the third side wall 73. The second side wall 72 is provided between the first side wall 71 and the third side wall 73 and is connected to the first side wall 71 and the third side wall 73. The leg portion 7 is formed integrally with the second fitting portion 44 of the second housing 42. The leg 7 keeps a predetermined distance between the mounting base 106 and the current sensor 22 in the distribution board 1 (see FIG. 6). The leg 7 moves along with the first casing 41 and the second casing 42 along the mounting base 106 while maintaining a distance between the mounting base 106 and the current sensor 22.

  Each attachment portion 8 includes a hook portion 81 and a side wall portion 82. One of the two attachment portions 8 is provided behind the first side portion 412 of the first housing 41 and is formed integrally with the first side portion 412, and the remaining one is the first housing portion 412. It is provided behind the second side portion 413 of the body 41 and is formed integrally with the second side portion 413. The flange portion 108 of the attachment base 106 is located between the side wall portions 82 of the two attachment portions 8 and is hooked on the hook portions 81 of the two attachment portions 8. As a result, the current measuring device 2 is attached to the attachment base 106. That is, the first housing 41 is attached to the distribution board 1 (see FIG. 6) by the attachment portion 8.

  The first storage portion 410 of the current sensor 21 and the first storage portion 410 of the current sensor 22 are connected to each other by a plurality (two in this embodiment) of connection portions 500. Each connecting portion 500 is formed in a plate shape. The connecting part 500 is made of resin or the like. The connecting portion 500 is deformed by receiving a force. Following the displacement of the conductive member 162, the current sensor 21 can be displaced with respect to the current sensor 22 while deforming the connecting portion 500.

  In addition, the material and structure of the connection part 500 are not limited to the above. As the connecting portion 500, a member having elasticity or flexibility can be used. For example, the connecting portion 500 may be a hinge structure using metal or resin as a material, or may be a spring such as a coil spring or a leaf spring. Alternatively, a member formed of a material having elasticity or flexibility may be sandwiched between the first storage portion 410 of the current sensor 21 and the first storage portion 410 of the current sensor 22 as a connecting portion 500 using a double-sided tape or the like. Good. As such materials, gel-like substances and rubbers used as cushioning materials are known.

  As described above, the attachment / detachment structure 9 according to the present embodiment includes the first body (first housing 41), the second body (second housing 42), the elastic member 200, and the release switch 5. . The first housing 41 has at least one concave portion (the fitting hole 462) in the first fitting portion 460. The second housing 42 has at least one protrusion 470 in the second fitting portion 44 as many as the fitting holes 462. The protrusion 470 is fitted in the fitting hole 462. The elastic member 200 applies an elastic force to at least one of the first housing 41 and the second housing 42. The elastic force moves the first housing 41 relatively away from the second housing 42. At least one of the first fitting portion 460 and the second fitting portion 44 is an elastic portion having elasticity. The release switch 5 has at least one action part 54 and an operation part 51. The operation part 51 gives the action part 54 the force that the action part 54 applies to the elastic part (first fitting part 460). When the force is applied to the operation portion 51, the action portion 54 applies a force to the elastic portion, elastically deforms the elastic portion, and releases the fitting between the protrusion 470 and the concave portion (the fitting hole 462).

  With the above configuration, in the detachable structure 9, the elastic portion (the fitting portion 460) is elastically deformed by applying a force to the elastic portion (the fitting portion 460) in the action portion 54 of the release switch 5, and the protrusion 470 and the concave portion (the fitting portion) The fitting with the hole 462) can be easily released.

  The elastic member 200 has an elastic force that moves the first body (first housing 41) relatively away from the second body (second housing 42). Therefore, when the coupling between the first casing 41 and the second casing 42 is released, the first casing 41 is relatively separated from the second casing 42 and the second casing 42 coupled to the first casing 41. Can be easily removed from the first housing 41.

  Further, in the detachable structure 9 according to the present embodiment, the operation unit 51 has one surface 511. A force is applied to one surface 511. The action part 54 protrudes from the side opposite to the one surface 511 in the operation part 51.

  With the above configuration, the one surface 511 in the operation portion 51 of the attachment / detachment structure 9 is suitable as a surface for applying a force to displace the action portion 54 to the side opposite to the one surface 511.

  Moreover, in the attachment / detachment structure 9 according to the present embodiment, the release switch 5 further includes a protruding piece 531 and a hooking claw 532. The protruding piece 531 protrudes from the operation unit 51. The hooking claw 532 is provided at the tip of the protruding piece 531. One of the first body (first housing 41) and the second body (second housing 42) includes a hole (restriction hole 446). The protruding piece 531 passes through the hole (restriction hole 446). The hooking claw 532 is hooked on the periphery of the hole (the restriction hole 446) in the one body.

  With the above configuration, in the detachable structure 9, a hole (restriction hole 446) in at least one body (second housing 42) of the first body (first housing 41) or the second body (second housing 42). ) Passes through the protruding piece 531, and the hooking claw 532 is hooked around the periphery of the restriction hole 446. Thereby, it can suppress that release | release switch 5 remove | deviates from said one body (2nd housing | casing 42).

  In the detachable structure 9 according to this embodiment, the action portion 54 includes a release surface 541. The elastic part (first fitting part 460) includes a surface to be released (action surface 461). The released surface comes into contact with the release surface 541 of the action portion 54 and a force is applied from the action portion 54. At least one of the release surface 541 and the released surface is an inclined surface that is inclined with respect to the facing direction 100. The facing direction 100 is a direction in which the second body (second housing 42) is positioned with respect to the first body (first housing 41) when the protrusion 470 is fitted in the recess (the fitting hole 462). .

  As described above, in the facing direction 100, when the protrusion 470 is fitted in the recess (the fitting hole 462), the second body (second casing 42) is positioned with respect to the first body (first casing 41). Direction. In the detachable structure 9, when the release surface (action surface 541) of the action portion 54 is inclined with respect to the facing direction 100, the action portion 54 is inclined by the elastic portion (the fitting portion 460) and another member ( In this embodiment, it is easy to enter a gap with the cylindrical portion 442). Accordingly, the action portion 54 can easily deform the elastic portion by applying a force to the elastic portion. Further, when the released surface (action surface 461) of the elastic part is inclined with respect to the facing direction 100, the elastic part is in contact with other members (in the present embodiment, the second housing 42) by the inclination. It is easy to produce a gap. Therefore, the action part 54 can enter the gap and apply a force to the elastic part to easily deform the elastic part. Thereby, fitting with the protrusion 470 and a recessed part (fitting hole 462) can be cancelled | released easily.

  Moreover, in the attachment / detachment structure 9 according to the present embodiment, the first body (first housing 41) has a plurality of recesses (insertion holes 462). The second body (second housing 42) has a plurality of protrusions 470. In the first body (first housing 41), the plurality of fitting holes 462 are provided separately at a plurality of locations. In the second body (second housing 42), the plurality of protrusions 470 are provided separately at a plurality of locations.

  With the above configuration, in the detachable structure 9, the first body (first housing 41), the second body (second housing 42), and the projection 470 are fitted into the recesses (insertion holes 462) at a plurality of locations. Can be stably bound.

  Moreover, in the detachable structure 9 according to the present embodiment, the release switch 5 has a plurality of action portions 54. A plurality of elastic portions (first fitting portions 460) are provided. The release switch 5 is attached to one of the first body (first housing 41) and the second body (second housing 42). The body to which the release switch 5 is attached has a plurality of guide holes 447 through which the plurality of action portions 54 pass. When the plurality of protrusions 470 are fitted into the plurality of recesses (the fitting holes 462), the plurality of guide holes 447 are opposed to the elastic part (the first fitting part 460). The plurality of action portions 54 are in contact with the plurality of elastic portions simultaneously.

  With the above configuration, in the detachable structure 9, the action portion 54 is passed through the guide hole 447 and the action portion 54 is displaced along the guide hole 447, thereby bringing the action portion 54 into contact with the elastic portion (the fitting portion 460). be able to. Accordingly, it is easy to apply a force to the elastic portion (the fitting portion 460) by the action portion 54 to deform the elastic portion (the fitting portion 460) and to release the fitting between the protrusion 470 and the concave portion (the fitting hole 462).

  Further, each of the plurality of action portions 54 can simultaneously contact the plurality of elastic portions (the fitting portions 460) and apply a force to the plurality of elastic portions (the fitting portions 460) simultaneously by passing through the guide holes 447. . Therefore, the fitting of the plurality of protrusions 470 and the plurality of concave portions (the fitting holes 462) can be simultaneously released.

  Moreover, in the attachment / detachment structure 9 according to the present embodiment, the first fitting portion 460 includes a first working surface (working surface 461). The second fitting portion 44 includes a second working surface (working surface 471). At least one of the first working surface (working surface 461) and the second working surface (working surface 471) is an inclined surface inclined with respect to the facing direction 100. The facing direction 100 is a direction in which the second body (second housing 42) is positioned with respect to the first body (first housing 41) when the protrusion 470 is fitted in the recess (the fitting hole 462). . When the first body (first housing 41) relatively approaches the second body (second housing 42), the first fitting portion 460 to the second fitting portion 44 of the first working surface (working surface 461). A force is applied to the second working surface (working surface 471), the elastic portion (first fitting portion 460) is elastically deformed, and the protrusion 470 is fitted into the concave portion (fitting hole 462).

  With the above configuration, in the attachment / detachment structure 9, the protrusion 470 is recessed (the fitting hole 462) by a simple operation of bringing the first body (first housing 41) relatively close to the second body (second housing 42). ).

  Moreover, in the attachment / detachment structure 9 according to the present embodiment, the release switch 5 is on the opposite side of the first body (first housing 41) to the second body (second housing 42) side in the facing direction 100. An end or an end 422 of the second body (second housing 42) opposite to the first body (first housing 41) side is attached. The facing direction 100 is a direction in which the second body (second housing 42) is positioned with respect to the first body (first housing 41) when the protrusion 470 is fitted in the recess (the fitting hole 462). .

  As described above, in the detachable structure 9, the release switch 5 is provided at the end of the first body (first housing 41) or the end 422 of the second body (second housing 42) in the facing direction 100. It is easy to secure a space for applying a force to the operation unit 51 of the release switch 5.

  The attachment / detachment structure 9 according to the present embodiment further includes a release switch cover 6. The release switch cover 6 covers the operation unit 51.

  As described above, in the detachable structure 9, since the operation unit 51 of the release switch 5 is covered with the release switch cover 6, it is possible to prevent the operation unit 51 from being erroneously operated.

  Moreover, in the attachment / detachment structure 9 according to the present embodiment, the release switch 5 is attached to one of the first body (first housing 41) and the second body (second housing 42). The release switch cover 6 is rotatably attached to the body to which the release switch 5 is attached.

  With the above configuration, in the detachable structure 9, by rotating the release switch cover 6, the state where the release switch cover 6 covers the operation unit 51 of the release switch 5 can be eliminated, and force can be applied to the operation unit 51. Easy.

  The current sensor 21 (22) according to the present embodiment includes the detachable structure 9, the first core 31, and the second core 32. The first core 31 is accommodated in the first body (first housing 41). The second core 32 is housed inside the second body (second housing 42). The second core 32 forms a closed magnetic path together with the first core 31. The closed magnetic circuit surrounds the flat conductive member. The elastic member 200 is elastic between the first body (first housing 41) and the first core 31 and between the second body (second housing 42) and the second core 32. It is arranged on at least one of them. The elastic force moves the first core 31 relatively closer to the second core 32 and relatively moves the first body (first housing 41) away from the second body (second housing 42).

  With the above configuration, in the current sensors 21 and 22, the fitting between the protrusion 470 and the concave portion (the fitting hole 462) can be easily released by the release switch 5. Further, the second body (second casing 42) coupled to the first body (first casing 41) can be easily removed from the first body (first casing 41) by the elastic force of the elastic member 200. it can.

  Further, the first housing 41 that houses the first core 31 and the second housing 42 that houses the second core 32 are coupled to each other by fitting the projection 470 and the recess (the fitting hole 462). doing. Further, the elastic member 200 has an elastic force that brings the first core 31 closer to the second core 32. Therefore, the positional relationship between the first core 31 and the second core 32 can be maintained, and the closed magnetic path formed by the first core 31 and the second core 32 can be further stabilized.

  The distribution board 1 according to the present embodiment includes a current sensor 21 (22) and a conductive member 162.

  With the above configuration, in the distribution board 1, the fitting between the protrusion 470 and the concave portion (the fitting hole 462) can be easily released by the release switch 5. Further, the second body (second casing 42) coupled to the first body (first casing 41) can be easily removed from the first body (first casing 41) by the elastic force of the elastic member 200. it can.

  Further, the first housing 41 that houses the first core 31 and the second housing 42 that houses the second core 32 are coupled to each other by fitting the projection 470 and the recess (the fitting hole 462). doing. Further, the elastic member 200 has an elastic force that brings the first core 31 closer to the second core 32. Therefore, the positional relationship between the first core 31 and the second core 32 can be maintained, and the closed magnetic path formed by the first core 31 and the second core 32 can be further stabilized.

  The attachment / detachment structure 9 is not limited to a connection structure between the first housing and the second housing of the current sensor, and can be applied to a connection structure between various members. The detachable structure 9 can be applied to, for example, a connector coupling structure, a case-cover coupling structure, and the like. Further, instead of the first casing 41 and the second casing 42, members having no space inside may be used.

  In the present embodiment, in the detachable structure 9, the elastic member 200 is disposed between the second housing 42 and the second core 32, but the arrangement of the elastic member 200 is not limited to this. For example, the elastic member 200 may be disposed between the first housing 41 and the second housing 42. Alternatively, the elastic member 200 may be disposed between the first housing 41 and the first core 31. Even in these cases, the elastic member 200 has an elastic force that moves the first housing 41 relatively away from the second housing 42.

  Further, the number of the fitting holes 462 and the protrusions 470 is not limited to four. In other words, at least one insertion hole 462 and at least one protrusion 470 may be provided.

  In the present embodiment, a force is applied from the projection 470 to the first working surface (working surface 461) of the first fitting portion 460 on the second working surface (working surface 471), so that the projection 470 becomes the first fitting portion. 460 is fitted in the fitting hole 462 of 460. However, the method of fitting the protrusion 470 into the fitting hole 462 is not limited to this. For example, the first fitting portion 460 may be elastically deformed using a flathead screwdriver or the like to fit the protrusion 470 into the fitting hole 462 of the first fitting portion 460.

  The detachable structure 9 may not include the protruding piece 531, the hooking claw 532, the guide hole 447, and the release switch cover 6.

  Further, the release switch 5 may not be attached to the second housing 42. For example, the release switch 5 may be attached to the first housing 41.

  Further, the leg portion 7 may be attached to the first housing 41.

  Further, the attachment portion 8 may be provided in the second housing 42 and the second housing 42 may be attached to the distribution board 1.

  In the present embodiment, the current measuring device 2 includes two current sensors (the current sensor 21 and the current sensor 22), but the number of the current sensors may be one, or three or more. Also good. That is, the current measuring device 2 can measure the current flowing through the one or more conductive members 162.

  Further, as the measurement unit 3 of the current sensors 21 and 22, a Hall element type current sensor or the like can be used instead of the current transformer.

  Further, either one of the first working surface (working surface 461) and the second working surface (working surface 471) may be inclined with respect to the facing direction 100, or the first working surface and the second working surface. Both of the working surfaces may be inclined with respect to the facing direction 100.

  In this embodiment, both the release surface (working surface 541) and the surface to be released (working surface 461) are inclined, but only the release surface may be inclined or only the surface to be released. May be inclined.

  The second housing 42 has a first fitting portion 460 instead of the second fitting portion 44, and the first housing 41 has a second fitting portion 44 instead of the first fitting portion 460. May be.

  Moreover, the shape of the 1st fitting part 460 and the shape of the 2nd fitting part 44 may differ from this embodiment. For example, the first fitting portion 460 may have a recess having a bottom into which the protrusion 470 is fitted, instead of the fitting hole 462 that is a through hole. Alternatively, the fitting hole may be a through hole provided in the first storage portion 410 or a recess having a bottom. Alternatively, the shape of the second fitting portion 44 is changed so that the second fitting portion includes a protruding piece protruding leftward from the left end of the second storage portion 420 and a hooking claw (protrusion) provided at the tip of the protruding piece. May be provided. That is, the second fitting portion may have a shape like the restriction portion 53 shown in FIG. Furthermore, only one of the first fitting portion and the second fitting portion may have elasticity, or both the first fitting portion and the second fitting portion may have elasticity.

  In the present embodiment, the first working surface (working surface 461) for contacting the second working surface (working surface 471) is equal to the released surface for contacting the releasing surface (working surface 541). However, the released surface may be provided separately from the first working surface. Moreover, when the 2nd fitting part has elasticity, the 2nd action surface in a 2nd fitting part may correspond with the to-be-released surface.

  Further, the fitting hole 462 and the protrusion 470 may be provided on the front side or the rear side of the first casing 41 and the second casing 42, for example.

  Moreover, the release switch 5 may be provided on the left side, the front side, the rear side, the upper side, or the lower side of the first casing 41 and the second casing 42, for example. In particular, the release switch 5 may be attached to the end (left end) on the opposite side (right side) of the first case 41 in the facing direction 100 (left-right direction) to the second case 42 side (left side). .

  Further, the release switch cover 6 may not be fixed to the second housing 42 at the shaft portion 64. That is, the release switch cover 6 may be provided in the attachment / detachment structure 9 so as to be attached / detached from the configuration of the attachment / detachment structure 9 such as the second housing 42.

  The elastic member 200 is not limited to a coil spring. The elastic member 200 may be a spring such as a leaf spring, for example.

  Moreover, the structure of the attachment part 8 is not limited to this embodiment, What is necessary is just a structure which can attach the 1st housing | casing 41 or the 2nd housing | casing 42 to the electricity distribution panel 1. FIG. The attachment part 8 should just have the hook part 81, for example.

  Even in each of the above modifications, the attachment / detachment structure 9 can easily release the fitting between the protrusion 470 and the recess (the fitting hole 462) by the release switch 5. Further, the second body (second casing 42) coupled to the first body (first casing 41) can be easily removed from the first body (first casing 41) by the elastic force of the elastic member 200. it can.

  The embodiment described above is an example of the present invention. For this reason, this invention is not limited to these embodiment, A various deformation | transformation is possible in the range which does not deviate from the meaning of this invention.

1 Distribution board 21, 22 Current sensor 31 First core 32 Second core 41 First housing (first body)
42 Second housing (second body)
44 Second fitting part 5 Release switch 51 Operation part 54 Action part 6 Release switch cover 9 Detachable structure 100 Opposing direction 162 Conductive member 200 Elastic member 422 End 446 Restriction hole (hole)
447 Guide hole 460 First fitting portion (elastic portion)
461 Action surface (first action surface, released surface)
462 Insertion hole (concave)
470 Projection 471 Action surface (second action surface)
511 One surface 531 Projection piece 532 Hook claw 541 Action surface (release surface)

Claims (12)

A first body having at least one recess in the first fitting portion;
A second body having at least one protrusion of the same number as the recesses fitted in the recesses in the second fitting part;
An elastic member that applies an elastic force to move the first body relatively away from the second body to at least one of the first body and the second body;
A release switch,
At least one of the first fitting portion and the second fitting portion is an elastic portion having elasticity,
The release switch is
At least one working part;
An operation unit that applies to the action part a force that the action part applies to the elastic part;
The detachable structure is characterized in that when the force is applied to the operation part, the action part applies a force to the elastic part, elastically deforms the elastic part, and releases the fitting between the protrusion and the recess. . The operation unit has one surface to which a force is applied,
The attachment / detachment structure according to claim 1, wherein the action portion protrudes from a side opposite to the one surface in the operation portion. The release switch is
A protruding piece protruding from the operation portion;
A hooking claw provided at the tip of the protruding piece,
Either one of the first body and the second body includes a hole through which the protruding piece passes,
The detachable structure according to claim 1 or 2, wherein the hooking claw is hooked on a peripheral edge of the hole in the one body. The action part includes a release surface;
The elastic portion includes a released surface to which a force is applied from the acting portion in contact with the releasing surface of the acting portion,
At least one of the release surface and the release surface is inclined with respect to a facing direction in which the second body is positioned with respect to the first body when the protrusion is fitted in the recess. The attachment / detachment structure according to any one of claims 1 to 3, wherein the attachment / detachment structure is an inclined surface. The first body has a plurality of the recesses,
The second body has a plurality of the protrusions,
In the first body, the plurality of recesses are provided separately at a plurality of locations,
The detachable structure according to any one of claims 1 to 4, wherein in the second body, the plurality of protrusions are provided separately at a plurality of locations. The release switch has a plurality of the action parts,
A plurality of the elastic portions are provided,
The release switch is attached to one of the first body and the second body,
The body to which the release switch is attached has a plurality of guide holes through which the plurality of action portions pass,
When the plurality of protrusions are fitted in the plurality of recesses, the plurality of guide holes face the elastic portion,
The detachable structure according to claim 5, wherein the plurality of action portions are in contact with the plurality of elastic portions at the same time. The first fitting portion includes a first working surface,
The second fitting portion includes a second working surface,
At least one of the first working surface and the second working surface is in a facing direction, which is a direction in which the second body is located with respect to the first body, when the protrusion is fitted in the recess. An inclined surface inclined with respect to the
When the first body relatively approaches the second body, a force is applied from the first fitting portion to the second working surface of the second fitting portion on the first working surface, and the elastic portion is The attachment / detachment structure according to claim 1, wherein the attachment / detachment structure is elastically deformed and the protrusion is fitted into the recess.   When the protrusion is fitted in the recess, the release switch is arranged in a facing direction, which is a direction in which the second body is positioned with respect to the first body. The attachment / detachment structure according to any one of claims 1 to 7, wherein the attachment / detachment structure is attached to an opposite end or an end of the second body opposite to the first body side. .   The detachable structure according to claim 8, further comprising a release switch cover that covers the operation unit. The release switch is attached to one of the first body and the second body,
The detachable structure according to claim 9, wherein the release switch cover is rotatably attached to a body to which the release switch is attached. The detachable structure according to any one of claims 1 to 10,
A first core housed in the first body;
A second core that is housed inside the second body and forms a closed magnetic path surrounding the flat conductive member together with the first core;
The elastic member has an elastic force that moves the first core relatively closer to the second core and moves the first body relatively away from the second body. And at least one of the second body and the second core. The current sensor. A current sensor according to claim 11;
A distribution board comprising the conductive member.

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