JP6661763B2 - Current sensor - Google Patents

Description

  The present invention relates to a current sensor.

  2. Description of the Related Art Conventionally, there has been known a current sensor in which an electric wire is fixed and a magnetic field generated by a current flowing through the electric wire is detected by a magnetic detection element. For example, the current sensor described in Patent Literature 1 sandwiches and holds an electric wire between two holding portions from the outside in a radial direction, and detects a magnetic field with a magnetic detection element fixed to a housing. The current sensor of Patent Document 1 can hold electric wires of various diameters because two holding portions move.

JP-A-2005-11021 JP 2013-3127 A

  However, the current sensor of Patent Literature 1 has a configuration in which the electric wire is pressed by the two holding portions toward the inside of the U-shaped space defined by the housing, and thus the center position of the electric wire according to the diameter of the electric wire. Are different. That is, since the distance between the center position of the electric wire and the magnetic detection element differs depending on the diameter of the electric wire, it is impossible to measure the magnetic field due to the current flowing through the electric wire under a constant measurement condition regardless of the diameter of the electric wire. There are disadvantages.

  Patent Document 2 describes a current sensor that aligns the center of an electric wire with the center of an annular member by passing an electric wire through a hole of an annular member and inserting a wedge-shaped contact between the electric wire and the annular member. Have been. However, in the current sensor of Patent Literature 2, it is necessary for a person to operate a contact that is a member different from the annular member. Therefore, it is difficult to align the center of the electric wire with the center of the annular member unless a person familiar with the operation of the current sensor operates. In addition, there is a disadvantage that an operation error may occur because the operation is performed by a person.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a current sensor that can arrange the center of an electric wire at a fixed position by a simple operation regardless of the diameter of the electric wire.

The present invention provides a housing, a first holding unit movable in a first direction with respect to the housing, a second holding unit movable in a first direction with respect to the housing, and a first holding unit movable with respect to the housing. A first elastic body that elastically supports the first holding unit, a second elastic body that elastically supports the second holding unit with respect to the housing, and one or more magnetic detection elements provided in the housing. The first holding portion includes a first recess, the second holding portion includes a second recess, the first recess and the second recess are disposed facing each other, and the first elastic body includes When a force for moving the first concave portion and the second concave portion away from each other is applied to the first holding portion, an elastic force for bringing the first concave portion and the second concave portion closer to each other is applied to the first holding portion, When a force for moving the first concave portion and the second concave portion away from each other is applied to the second holding portion, an elastic force for bringing the first concave portion and the second concave portion closer to each other is applied to the second holding portion, and the first concave portion detects the magnetic force. A first holding surface and a second holding surface for holding an electric wire which is a detection target of a magnetic field by the element, the second recess having a third holding surface and a fourth holding surface for holding the electric wire; The first holding surface, the second holding surface, the third holding surface, and the fourth holding surface are parallel to a second direction orthogonal to the first direction, and the first holding surface and the second holding surface are in the first direction. And a third holding surface and a fourth holding surface are symmetrically arranged around the first virtual plane, and are symmetrically arranged around a first virtual plane parallel to the second direction. The first holding surface and the third holding surface are symmetrically arranged around a second virtual plane orthogonal to the first direction, and the second holding surface and the fourth holding surface define a second virtual plane. The first elastic member and the second elastic member are arranged symmetrically with respect to the center, and the first elastic member and the second elastic member are substantially parallel to the first direction and opposite to each other by substantially the same force. A recess is moved approximately the same distance, the first holding portion comprises a first end portion, the first holding portion comprises a first guide surface extending between the first end and the first recess, the The second holding portion includes a second end portion, the second holding portion has a second guide surface extending between the second end portion and the second concave portion, and the first guide surface and the second guide surface are separated from each other. Oppositely, a guide path for guiding the electric wire from between the first end portion and the second end portion to between the first concave portion and the second concave portion is defined, and the first guide surface is provided near the first end portion. A first tapered surface, the second guide surface has a second tapered surface near the second end, the first tapered surface and the second tapered surface are opposed to each other, and the first tapered surface and the second tapered surface are opposed to each other. The current sensor has a distance in the first direction between the first end portion and the second end portion that is closer to the tapered surface .

According to this configuration, the first holding surface to the fourth holding surface are symmetrically arranged around the first virtual plane and the second virtual plane, and move in the first direction while maintaining the symmetry. Therefore, when the wire is held by the first holding surface to the fourth holding surface, the center of the wire can be arranged at a fixed position by a simple operation regardless of the diameter of the wire, and the distance between the magnetic sensing element and the center of the wire Is kept constant. Therefore, the magnetic field due to the current flowing through the electric wire can be measured under constant measurement conditions regardless of the diameter of the electric wire. Further, since the first holding unit and the second holding unit move by the elastic force of the first elastic body and the second elastic body, the first holding unit and the second holding unit do not need to be separated from the housing. Also, an electric wire can be attached to the current sensor. Further, according to this configuration, since the first tapered surface and the second tapered surface are provided, when attaching the electric wire, the electric wire is pressed against the first tapered surface and the second tapered surface, so that the first tapered surface and the second tapered surface are pressed. The holding section and the second holding section can be smoothly separated from each other.

  Preferably, in the current sensor according to the present invention, the first guide surface includes a first opposing surface parallel to the second virtual plane between the first concave portion and the first tapered surface, and the second guide surface includes a second guide surface. A first opposing surface including a second opposing surface parallel to the second imaginary plane between the concave portion and the second tapered surface, wherein no electric wire is attached between the first holding portion and the second holding portion; And the second opposing surface are arranged at positions where they contact each other.

  According to this configuration, the first opposing surface and the second opposing surface come into contact with each other in a state where no electric wire is attached between the first holding portion and the second holding portion. 2 The position with the holding portion is stabilized, and breakage can be prevented.

The present invention provides a housing, a first holding unit movable in a first direction with respect to the housing, a second holding unit movable in a first direction with respect to the housing, and a first holding unit movable with respect to the housing. A first elastic body that elastically supports the first holding unit, a second elastic body that elastically supports the second holding unit with respect to the housing, and one or more magnetic detection elements provided in the housing. The first holding portion includes a first recess, the second holding portion includes a second recess, the first recess and the second recess are disposed facing each other, and the first elastic body includes When a force for moving the first concave portion and the second concave portion away from each other is applied to the first holding portion, an elastic force for bringing the first concave portion and the second concave portion closer to each other is applied to the first holding portion, When a force for moving the first concave portion and the second concave portion away from each other is applied to the second holding portion, an elastic force for bringing the first concave portion and the second concave portion closer to each other is applied to the second holding portion, and the first concave portion detects the magnetic force. A first holding surface and a second holding surface for holding an electric wire which is a detection target of a magnetic field by the element, the second recess having a third holding surface and a fourth holding surface for holding the electric wire; The first holding surface, the second holding surface, the third holding surface, and the fourth holding surface are parallel to a second direction orthogonal to the first direction, and the first holding surface and the second holding surface are in the first direction. And a third holding surface and a fourth holding surface are symmetrically arranged around the first virtual plane, and are symmetrically arranged around a first virtual plane parallel to the second direction. The first holding surface and the third holding surface are symmetrically arranged around a second virtual plane orthogonal to the first direction, and the second holding surface and the fourth holding surface define a second virtual plane. The first elastic member and the second elastic member are arranged symmetrically with respect to the center, and the first elastic member and the second elastic member are substantially parallel to the first direction and opposite to each other by substantially the same force. The first holding portion has a sliding surface extending in the first direction, and the second holding portion has an opposing sliding surface extending in the first direction. The current sensor has an opposing sliding surface overlapping in a second direction, and the sliding surface and the opposing sliding surface are relatively slidable in the first direction.

  According to this configuration, the sliding surface overlapping in the second direction and the opposing sliding surface are relatively slidable in the first direction, so that the first holding portion and the second holding portion are relatively movable in the first direction. While allowing for smooth movement, the displacement of the first holding unit and the second holding unit in the second direction can be suppressed. Thereby, the direction of the electric wire can be kept constant, and the detection accuracy of the magnetic field by the magnetic detection element increases.

  Preferably, in the current sensor of the present invention, the first holding surface, the second holding surface, the third holding surface, and the fourth holding surface are flat surfaces.

  According to this configuration, since the first to fourth holding surfaces are flat, electric wires having various diameters can be attached with their centers aligned with a simple configuration.

  Preferably, in the current sensor of the present invention, a plurality of magnetic detection elements are provided, and the plurality of magnetic detection elements are connected to a first virtual plane in a third virtual plane orthogonal to the first virtual plane and the second virtual plane. The magnetic sensing elements are arranged point-symmetrically about the intersection with the second virtual plane, and the sensitivity axes of the magnetic sensing elements are arranged point-symmetrically about the intersection in the third virtual plane.

  According to this configuration, the magnetic detection element and the sensitivity axis are arranged point-symmetrically around the center of the electric wire, so that substantially the same magnetic field can be measured by a plurality of magnetic detection elements regardless of the diameter of the electric wire. Can be.

  Preferably, in the current sensor of the present invention, a plurality of first elastic bodies arranged at different positions in a third direction orthogonal to the first direction and the second direction, and a plurality of first elastic bodies arranged at different positions in the third direction And a second elastic body.

  According to this configuration, since the plurality of first elastic bodies and the plurality of second elastic bodies are provided at different positions in the third direction, compared with the case where each of the first elastic body and the second elastic body is one, Thus, the movement of the first holding unit and the second holding unit can be stabilized.

  Preferably, in the current sensor of the present invention, each of the first elastic bodies faces one second elastic body in the first direction.

  According to this configuration, since each of the first elastic members faces one second elastic member in the first direction, the first holding portion and the second holding portion move symmetrically in the first direction. Cheap.

  Preferably, in the current sensor according to the aspect of the invention, the first holding unit includes a first operating unit that is in contact with one first elastic body, and a second operating unit that is in contact with another one first elastic body, The second holding portion includes a third action portion in contact with one second elastic body and a fourth action portion in contact with another one second elastic body, and includes a first virtual plane, a second virtual plane, In a fourth imaginary plane orthogonal to, the intersection of a virtual straight line connecting the first action part and the fourth action part and a virtual straight line connecting the second action part and the third action part is defined as It is substantially the same as the intersection of the first virtual plane and the second virtual plane.

According to this configuration, in the third virtual plane, the intersection of the virtual straight line connecting the first action portion and the fourth action portion and the virtual straight line connecting the second action portion and the third action portion is formed. , The intersection between the first virtual plane and the second virtual plane is substantially the same, so that the first holding section and the second holding section are likely to move symmetrically in the first direction.

  Preferably, in the current sensor according to the present invention, the magnetic detection element is arranged at a position shifted from a movable range of the first holding unit and the second holding unit in the second direction.

  According to this configuration, since the magnetic detection element is disposed at a position shifted from the movable range of the first holding unit and the second holding unit in the second direction, the first detection unit is configured to have a small size as a whole, The magnetic detection element can be arranged close to the electric wire without interfering with the movement of the holding unit and the second holding unit.

  The present invention provides a housing, a first holding unit movable in a first direction with respect to the housing, a second holding unit movable in a first direction with respect to the housing, and a first holding unit movable with respect to the housing. A first elastic body that elastically supports the first holding unit, a second elastic body that elastically supports the second holding unit with respect to the housing, and one or more magnetic detection elements provided in the housing. The first holding portion includes a first recess, the second holding portion includes a second recess, the first recess and the second recess are disposed facing each other, and the first elastic body includes When a force for moving the first concave portion and the second concave portion away from each other is applied to the first holding portion, an elastic force for bringing the first concave portion and the second concave portion closer to each other is applied to the first holding portion, When a force for moving the first concave portion and the second concave portion away from each other is applied to the second holding portion, an elastic force for bringing the first concave portion and the second concave portion closer to each other is applied to the second holding portion, and the first concave portion detects the magnetic force. A first holding surface and a second holding surface for holding an electric wire which is a detection target of a magnetic field by the element, the second recess having a third holding surface and a fourth holding surface for holding the electric wire; The first holding portion includes a first end portion, the first holding portion includes a first guide surface extending between the first end portion and the first recess, and the second holding portion includes a second end portion. A second holding portion having a second guide surface extending between the second end portion and the second concave portion, wherein the first guide surface and the second guide surface face each other, and the first end portion and the second guide surface are opposed to each other. A guide path for guiding the electric wire from between the two ends to between the first concave portion and the second concave portion is defined, the first guide surface has a first tapered surface near the first end portion, and the second guide surface. The surface has a second tapered surface near the second end, the first tapered surface and the second tapered surface are opposed to each other, and the first tapered surface and the second tapered surface are in a first direction between the first tapered surface and the second tapered surface. The distance between the first end and the second end Greater the closer is a current sensor.

  The present invention provides a housing, a first holding unit movable in a first direction with respect to the housing, a second holding unit movable in a first direction with respect to the housing, and a first holding unit movable with respect to the housing. A first elastic body that elastically supports the first holding unit, a second elastic body that elastically supports the second holding unit with respect to the housing, and one or more magnetic detection elements provided in the housing. The first holding portion includes a first recess, the second holding portion includes a second recess, the first recess and the second recess are disposed facing each other, and the first elastic body includes When a force for moving the first concave portion and the second concave portion away from each other is applied to the first holding portion, an elastic force for bringing the first concave portion and the second concave portion closer to each other is applied to the first holding portion, When a force for moving the first concave portion and the second concave portion away from each other is applied to the second holding portion, an elastic force for bringing the first concave portion and the second concave portion closer to each other is applied to the second holding portion, and the first concave portion detects the magnetic force. A first holding surface and a second holding surface for holding an electric wire which is a detection target of a magnetic field by the element, the second recess having a third holding surface and a fourth holding surface for holding the electric wire; A sliding surface in which the first holding surface, the second holding surface, the third holding surface, and the fourth holding surface are parallel to a second direction orthogonal to the first direction, and the first holding portion extends in the first direction; The second holding portion has an opposing sliding surface extending in the first direction, the sliding surface and the opposing sliding surface overlap in the second direction, and the sliding surface and the opposing sliding surface are , A current sensor disposed so as to be relatively slidable in the first direction.

  ADVANTAGE OF THE INVENTION According to this invention, regardless of the diameter of an electric wire, the center of an electric wire can be arrange | positioned at a fixed position by simple operation.

FIG. 3 is a perspective view of the current sensor according to the embodiment of the present invention, holding an electric wire. FIG. 2 is a perspective view of the current sensor and the electric wire shown in FIG. 1 with a lid removed. FIG. 3 is a plan view of the current sensor and the electric wire shown in FIG. 2 with a lid removed. It is a front view of the electric current sensor and electric wire shown in FIG. FIG. 5 is a sectional view of the current sensor taken along line 5-5 in FIG. 4. FIG. 3 is an exploded perspective view of a first holding unit and a second holding unit illustrated in FIG. 2 when viewed from a z1 side. FIG. 3 is an exploded perspective view of a first holding unit and a second holding unit illustrated in FIG. 2 when viewed from a z2 side. FIG. 9 is an exploded cross-sectional view of the first holding unit and the second holding unit along line 8-8 in FIG. 4. FIG. 9 is a conceptual diagram showing a positional relationship between a first recess and a second recess shown in FIG. 8. FIG. 11 is an exploded cross-sectional view of the first holding unit and the second holding unit along line 10-10 in FIG. 3.

(overall structure)
Hereinafter, a current sensor according to an embodiment of the present invention will be described. FIG. 1 is a perspective view of the current sensor 100 of the present embodiment in a state where the electric wire 101 is held. FIG. 2 is a perspective view of the electric current sensor 100 and the electric wire 101 of FIG. FIG. 3 is a plan view of the electric current sensor 100 and the electric wire 101 of FIG. FIG. 4 is a front view of the current sensor 100 and the electric wire 101. FIG. 5 is a cross-sectional view of the current sensor 100 in a cross-section parallel to the xy plane passing through line 5-5 in FIG. FIG. 5 is a cross-sectional view when viewed in the z2 direction.

  The current sensor 100 detects the magnitude of the current flowing through the electric wire 101 by detecting a magnetic field generated by the current flowing through the electric wire 101 having a substantially circular cross section. The electric wire 101 to be detected is not limited to the illustrated diameter.

  In this specification, the x direction, the y direction, and the z direction that are orthogonal to each other are defined. The x direction represents the x1 direction and the x2 direction, which are opposite to each other, without distinction. The y direction represents the y1 direction and the y2 direction, which are opposite to each other, without distinction. The z direction represents the z1 direction and the z2 direction, which are opposite to each other, without distinction. These directions are defined for convenience in order to explain the relative positional relationship, and do not limit the directions in actual use. Regardless of whether or not the component is described as “abbreviated”, as long as the technical idea of the embodiment disclosed herein is realized, the component has a strict geometric shape based on the described expression. Not limited. The y1 side may be referred to as a front side, and the y2 side may be referred to as a rear side. These expressions are used to describe the relative positional relationship of the components, and do not limit the directions in use. is not.

  As illustrated in FIG. 1, the current sensor 100 includes a housing 110, a first holding unit 120 that can move in parallel with the housing 110 in the x direction, and a movement that is parallel with the housing 110 in the x direction. And a possible second holding part 130. As shown in FIG. 2, the current sensor 100 further includes a front first elastic body 141, a rear first elastic body 142, a front second elastic body 143, and a rear second elastic body 144 in the housing 110. Including. As shown in FIG. 5, the current sensor 100 includes a first magnetic detection element 151-1 to a tenth magnetic detection element 151-10 provided in the housing 110 (hereinafter, referred to as a magnetic detection element 151 without distinction). In some cases).

(Housing)
As shown in FIG. 1, the case 110 includes a case main body 111 and a case lid 112. The outer shape of the housing 110 is a hollow substantially rectangular parallelepiped. As shown in FIG. 3, the housing body 111 includes a front plate 161, a rear plate 162, a first side plate 163, and a second side plate 164, and further includes a bottom plate 165 shown in FIG.

  As shown in FIG. 2, the front plate 161 is formed of two thin plates that extend in parallel with the xz plane and are spaced apart in the x direction. The rear plate 162 is a thin plate that extends parallel to the xz plane and is located on the y2 side of the front plate 161. The first side plate 163 is a thin plate extending in parallel to the yz plane between the x1 side edge of the front plate 161 and the x1 side edge of the rear plate 162. The second side plate 164 is a thin plate extending in parallel to the yz plane between the x2 side edge of the front plate 161 and the x2 side edge of the rear plate 162. The bottom plate 165 is a thin plate that extends between the z2 side edges of the front plate 161, the rear plate 162, the first side plate 163, and the second side plate 164.

  As shown in FIG. 5, the housing body 111 further includes an inner wall 166 that is recessed from the front plate 161 toward the y2 side. The inner wall 166 is a substantially U-shaped thin plate opened on the y1 side in a cross section parallel to the xy plane, and has substantially the same cross section at any position in the z direction. As shown in FIG. 2, the inner wall 166 has an opening 170 near the end on the z1 side. The opening 170 connects the space inside the housing main body 111 and the housing space 113 surrounded by the inner wall 166 in the x direction.

  As shown in FIG. 3, the housing body 111 includes a first guide wall 171 extending in the x1 direction from the x1 end of the two y1 ends of the opening 170. The first guide wall 171 is a thin plate that extends parallel to the xz plane. The housing body 111 includes a second guide wall 172 extending in the x2 direction from the x2 side end of the two y1 ends of the opening 170. The second guide wall 172 is a thin plate that extends parallel to the xz plane.

  As shown in FIG. 2, the housing main body 111 includes a first partition wall 167 parallel to the xy plane inside, and further includes a second partition wall 168 parallel to the xy plane as shown in FIG. The second partition wall 168 is located on the z2 side of the first partition wall 167.

  As shown in FIG. 1, the housing lid 112 is a thin plate located on the z1 side of the housing main body 111 and extending in the xy plane. The housing lid 112 closes the opening surrounded by the z1 side edges of the front plate 161, the rear plate 162, the first side plate 163, and the second side plate 164 shown in FIG. The housing lid 112 shown in FIG. 1 has a substantially U-shaped notch 169 that has the same shape in the z direction from the housing space 113 surrounded by the inner wall 166. As shown in FIG. 1, the inner wall 166 and the notch 169 define a housing space 113 that penetrates the housing 110 in the z direction and opens in the y1 direction.

(Holding part)
FIG. 6 is an exploded perspective view of the first holding unit 120 and the second holding unit 130 viewed obliquely from the z1 side. FIG. 7 is an exploded perspective view of the first holding unit 120 and the second holding unit 130 viewed obliquely from the z2 side. FIG. 8 is a cross-sectional view of the first holding unit 120 and the second holding unit 130 in a cross section taken along line 8-8 in FIG. 4 and parallel to the xy plane. FIG. 8 is a cross-sectional view when viewed in the z2 direction. However, FIG. 8 illustrates the first holding unit 120 and the second holding unit 130 in a state where they are separated from each other.

(First holding unit)
The first holding unit 120 has a first upper surface 201 on the z1 side parallel to the xy plane shown in FIG. 6 and a first lower surface 202 on the z2 side parallel to the xy plane shown in FIG. As shown in FIG. 6, the first holding unit 120 has a first end 203 on the y1 side and a first rear end 204 on the y2 side. Both the first end 203 and the first rear end 204 are parallel to the xz plane and extend between the first upper surface 201 and the first lower surface 202. As illustrated in FIG. 7, the first holding unit 120 has a first side surface 205 on the x1 side, which is substantially parallel to the yz plane and has a partly stepped portion. The first side surface 205 extends between the x1 side edges of the first upper surface 201, the first lower surface 202, the first end 203, and the first rear end 204.

  As shown in FIG. 6, the first holding unit 120 includes a first recess 210 on the x2 side. The first concave portion 210 is located between the first end 203 and the first rear end 204 at a position away from the first end 203 and the first rear end 204, and has a first upper surface 201 and a first lower surface 202. Spread between. As shown in FIG. 8, the cross section of the first concave portion 210 is substantially the same at any position in the z direction except for a region adjacent to a first sliding portion 231 and a second sliding portion 232 described later. . The first recess 210 is recessed in the x1 direction from a plane parallel to the yz plane.

  As shown in FIG. 8, the first recess 210 has a first holding surface 211 and a second holding surface 212 that hold the electric wire 101 to be detected by the magnetic detection element 151 for the magnetic field. Both the first holding surface 211 and the second holding surface 212 are parallel to the z direction. The second holding surface 212 is located on the y2 side of the first holding surface 211. An imaginary surface extending the first holding surface 211 and an imaginary surface extending the second holding surface 212 intersect at an angle of less than 180 degrees in a cross section parallel to the xy plane. In the cross section shown in FIG. 8, the first holding surface 211 and the second holding surface 212 are connected by a smooth curve.

  As shown in FIG. 8, the first holding unit 120 has a first guide surface 220 between the first recess 210 and the first end 203. The first guide surface 220 extends between the first upper surface 201 and the first lower surface 202 shown in FIG. As shown in FIG. 8, the cross section of the first guide surface 220 parallel to the xy plane is substantially the same at any position in the z direction. The first guide surface 220 has a first tapered surface 221 and a first opposed surface 222.

  The first tapered surface 221 is located near the first end 203 and is in contact with the first end 203. The first tapered surface 221 is a plane parallel to the z direction, and the normal direction is inclined with respect to the x direction and the y direction. The closer the first tapered surface 221 is to the first end 203, the farther it is from the second holding unit 130 in the x direction.

  The first opposing surface 222 extends between the first tapered surface 221 and the first concave portion 210 in parallel to the yz plane. The y2 side edge of the first facing surface 222 is connected to the y1 side edge of the first holding surface 211. The y1 side edge of the first opposing surface 222 is connected to the y2 side edge of the first tapered surface 221.

  As shown in FIG. 6, the first holding section 120 has a first sliding section 231 and a second sliding section 232 near the first rear end 204. Both the first sliding portion 231 and the second sliding portion 232 protrude in the x2 direction between the first rear end 204 and the first concave portion 210. The first sliding portion 231 is separated from the first upper surface 201 in the z2 direction, and has a constant thickness in the z direction. The first sliding portion 231 has, on the z1 side, a first sliding surface 233 parallel to the xy plane and extending in the x direction, and a second sliding surface parallel to the xy plane and extending in the x direction on the z2 side. 234. The second sliding portion 232 is located on the z2 side of the first sliding portion 231 and has a certain thickness from the first lower surface 202 in the z1 direction. The second sliding portion 232 has, on the z1 side, a third sliding surface 235 extending in the x direction parallel to the xy plane.

  As shown in FIG. 7, the first holding unit 120 has a first receiving hole 241 and a second receiving hole 242 that are recessed in the x2 direction from the first side surface 205. The first accommodation hole 241 is located near the first end 203 and slightly separated from the first end 203 in the y2 direction. The first accommodation hole 241 is annular when viewed in the x direction, and is located near the center in the z direction. As shown in FIG. 8, the first accommodation hole 241 extends to the first action part 243 inside the first holding part 120. As shown in FIG. 7, the second accommodation hole 242 is located near the first rear end 204 and partially opens also at the first rear end 204. The second accommodation hole 242 is annular when viewed in the x direction, and is located near the center in the z direction. As shown in FIG. 8, the second accommodation hole 242 extends to the second action part 244 inside the first holding part 120.

  The first holding portion 120 is sandwiched between the first guide wall 171 and the rear plate 162 shown in FIG. 3 in the y direction, and has the first partition wall 167 shown in FIG. 3 and the housing lid 112 shown in FIG. Since they are sandwiched in the z-direction, they translate in the x-direction without large backlash. As shown in FIG. 3, a part of the first holding unit 120 protrudes from the opening 170 into the housing space 113 in the x2 direction.

(Second holding unit)
The second holding unit 130 has a second upper surface 301 on the z1 side parallel to the xy plane shown in FIG. 6 and a second lower surface 302 on the z2 side parallel to the xy plane shown in FIG. As shown in FIG. 6, the second holding section 130 has a second end 303 on the y1 side and a second rear end 304 on the y2 side. The second end 303 and the second rear end 304 are both parallel to the xz plane and extend between the second upper surface 301 and the second lower surface 302. The second holding portion 130 has a second side surface 305 on the x2 side which is substantially parallel to the yz plane and has a partly stepped portion. The second side surface 305 extends between the x2 side edges of the second upper surface 301, the second lower surface 302, the second end 303, and the second rear end 304.

  As shown in FIG. 7, the second holding unit 130 includes a second recess 310 on the x1 side. The second concave portion 310 is located between the second end 303 and the second rear end 304 and away from the second end 303 and the second rear end 304, and has a second upper surface 301 and a second lower surface 302. Spread between. As shown in FIG. 8, the cross section of the second concave portion 310 is substantially the same at any position in the z direction except for a region adjacent to a third sliding portion 331 and a fourth sliding portion 332 described below. . The second recess 310 is recessed in the x2 direction from a plane parallel to the yz plane.

  As shown in FIG. 8, the second recess 310 has a third holding surface 311 for holding the electric wire 101 and a fourth holding surface 312. The third holding surface 311 and the fourth holding surface 312 are both parallel to the z direction. The fourth holding surface 312 is located on the y2 side of the third holding surface 311. The virtual surface extending the third holding surface 311 and the virtual surface extending the fourth holding surface 312 intersect at an angle of less than 180 degrees in a cross section parallel to the xy plane. In the cross section shown in FIG. 8, the third holding surface 311 and the fourth holding surface 312 are connected by a smooth curve.

  As shown in FIG. 8, the second holding unit 130 has a second guide surface 320 between the second recess 310 and the second end 303. The second guide surface 320 extends between the second upper surface 301 and the second lower surface 302 shown in FIG. As shown in FIG. 8, the cross section of the second guide surface 320 parallel to the xy plane is substantially the same at any position in the z direction. The second guide surface 320 has a second tapered surface 321 and a second opposed surface 322.

  The second tapered surface 321 is located near the second end 303 and is in contact with the second end 303. The second tapered surface 321 is a plane parallel to the z direction, and the normal direction is inclined with respect to the x direction and the y direction. The closer the second tapered surface 321 is to the second end 303, the farther the second tapered surface 321 is from the first holding unit 120 in the x direction.

  The second opposed surface 322 extends between the second tapered surface 321 and the second concave portion 310 in parallel with the yz plane. The y2 side edge of the second facing surface 322 is connected to the y1 side edge of the third holding surface 311. The y1 side edge of the second opposing surface 322 is connected to the y2 side edge of the second tapered surface 321.

  As shown in FIG. 6, the second holding section 130 has a third sliding section 331 and a fourth sliding section 332 near the second rear end 304. Both the third sliding portion 331 and the fourth sliding portion 332 protrude in the x1 direction between the second rear end 304 and the second concave portion 310. The third sliding portion 331 has a certain thickness from the second upper surface 301 in the z2 direction. The third sliding portion 331 has, on the z2 side, a first opposing sliding surface 333 extending in the x direction parallel to the xy plane. The fourth sliding portion 332 is located on the z2 side of the third sliding portion 331. The fourth sliding portion 332 has, on the z1 side, a second opposing sliding surface 334 parallel to the xy plane and extending in the x direction. On the z2 side, a third opposing sliding surface parallel to the xy plane and extending in the x direction. It has a moving surface 335.

  As shown in FIG. 6, the second holding unit 130 has a third receiving hole 341 and a fourth receiving hole 342 that are recessed in the x1 direction from the second side surface 305. The third accommodation hole 341 is located near the second end 303 and is slightly separated from the second end 303 in the y2 direction. The third accommodation hole 341 is annular when viewed in the x direction, and is located near the center in the z direction. As shown in FIG. 8, the third accommodation hole 341 extends to the third action portion 343 inside the second holding portion 130. As shown in FIG. 6, the fourth accommodation hole 342 is located near the second rear end 304, and also partially opens at the second rear end 304. The fourth accommodation hole 342 is annular when viewed in the x direction, and is located near the center in the z direction. As shown in FIG. 8, the fourth housing hole 342 extends to the fourth action section 344 inside the first holding section 120.

  The second holding portion 130 is sandwiched between the second guide wall 172 and the rear plate 162 shown in FIG. 3 in the y direction, and has the first partition wall 167 shown in FIG. 3 and the housing lid 112 shown in FIG. Since they are sandwiched in the z-direction, they translate in the x-direction without large backlash. As shown in FIG. 3, a part of the second holding unit 130 projects from the opening 170 into the accommodation space 113 in the x1 direction.

(Relationship between the first holding unit and the second holding unit)
FIG. 9 is a conceptual diagram showing the positional relationship between the first concave portion 210 and the second concave portion 310 when viewed in a cross section parallel to the xy plane as in FIG. The first recess 210 and the second recess 310 are arranged to face each other in the x direction.

  The first holding surface 211 and the second holding surface 212 are symmetrically arranged about a first virtual plane 401 parallel to the x direction and the z direction (that is, parallel to the xz plane). The third holding surface 311 and the fourth holding surface 312 are symmetrically arranged about the first virtual plane 401. The first holding surface 211 and the third holding surface 311 are symmetrically arranged around a second virtual plane 402 orthogonal to the x direction (that is, parallel to the yz plane). The second holding surface 212 and the fourth holding surface 312 are symmetrically arranged about the second virtual plane 402. Although the first holding unit 120 and the second holding unit 130 approach and move away in the x direction, the first holding surface 211, the second holding surface 212, the third holding surface 311, and the fourth holding surface 312 There is no change in symmetry.

  As shown in FIG. 3, the first opposing surface 222 and the second opposing surface 322 are parallel to the yz plane, that is, parallel to the second virtual plane 402 shown in FIG. As illustrated in FIG. 3, in a state where the electric wire 101 is attached between the first holding unit 120 and the second holding unit 130, the first opposing surface 222 and the second opposing surface 322 are arranged at positions separated from each other. Is done. In a state where the electric wire 101 is not attached between the first holding unit 120 and the second holding unit 130, the first opposing surface 222 and the second opposing surface 322 are arranged at positions where they contact each other.

  As shown in FIG. 8, the first guide surface 220 and the second guide surface 320 face each other, and the electric wire 101 (FIG. 1) is moved from between the first end 203 and the second end 303 to the first recess 210. And a guide path 114 for guiding the space between the second recess 310 and the second recess 310. The first tapered surface 221 and the second tapered surface 321 face each other. The distance between the first tapered surface 221 and the second tapered surface 321 in the x direction increases as the distance from the first end 203 to the second end 303 increases.

  In the assembled state shown in FIG. 2, the first sliding surface 233 and the first opposing sliding surface 333 shown in FIG. 6 overlap in the z direction, and are disposed so as to be relatively slidable in the x direction. I have. The second sliding surface 234 and the second opposing sliding surface 334 overlap in the z direction, and are arranged so as to be relatively slidable in the x direction. The third sliding surface 235 and the third opposing sliding surface 335 overlap in the z direction, and are arranged to be relatively slidable in the x direction.

  FIG. 10 is a cross-sectional view of the first holding unit 120 and the second holding unit 130 in a cross section taken along line 10-10 in FIG. 3 and parallel to the xz plane. FIG. 10 is a cross section viewed in the y1 direction. As shown in FIG. 10, the first sliding part 231 is always sandwiched between the third sliding part 331 and the fourth sliding part 332. The fourth sliding part 332 is always sandwiched between the first sliding part 231 and the second sliding part 232. When the first holding unit 120 and the second holding unit 130 relatively move in the x direction, the first sliding surface 233 and the first opposing sliding surface 333 are always in contact or slightly separated from each other. The second sliding surface 234 and the second opposing sliding surface 334 are always in contact or slightly separated from each other, and the third sliding surface 235 and the third opposing sliding surface 335 , Always in contact or slightly apart. Therefore, the first holding unit 120 and the second holding unit 130 move without rattling in the z direction.

(Elastic body)
As shown in FIG. 3, the front first elastic body 141 and the rear first elastic body 142 are coil springs disposed between the first holding unit 120 and the first side plate 163. On the other hand, the first holding unit 120 is elastically supported. The front first elastic body 141 and the rear first elastic body 142 are arranged at different positions in the y direction. Specifically, the rear first elastic body 142 is arranged on the y2 side of the front first elastic body 141.

  The x2 side end of the front first elastic body 141 illustrated in FIG. 3 is housed in the first housing hole 241 illustrated in FIG. 8 and is in contact with the first holding unit 120 at the first operating unit 243. The x2 side end of the rear first elastic body 142 illustrated in FIG. 3 is housed in the second housing hole 242 illustrated in FIG. 8, and is in contact with the first holding unit 120 at the second action unit 244. The front first elastic body 141 and the rear first elastic body 142 shown in FIG. 3 perform the first operation when a force for separating the first concave part 210 and the second concave part 310 is applied to the first holding part 120. An elastic force for bringing the first recess 210 and the second recess 310 closer to each other is applied to the first holding unit 120 via the section 243 and the second action section 244.

  As shown in FIG. 3, the front second elastic body 143 and the rear second elastic body 144 are coil springs disposed between the second holding unit 130 and the second side plate 164. On the other hand, the second holding portion 130 is elastically supported. The front second elastic body 143 and the rear second elastic body 144 are arranged at different positions in the y direction. Specifically, the rear second elastic body 144 is disposed on the y2 side of the front second elastic body 143.

  The x1 end of the front second elastic body 143 illustrated in FIG. 3 is housed in the third housing hole 341 illustrated in FIG. 8, and is in contact with the second holding unit 130 at the third action unit 343. The x1 side end of the rear second elastic body 144 illustrated in FIG. 3 is housed in the fourth housing hole 342 illustrated in FIG. 8 and is in contact with the second holding unit 130 at the fourth action unit 344. The front second elastic body 143 and the rear second elastic body 144 shown in FIG. 3 have a third action when a force for separating the first recess 210 and the second recess 310 is applied to the second holding portion 130. Through the portion 343 and the fourth action portion 344, an elastic force for bringing the first concave portion 210 and the second concave portion 310 closer is applied to the second holding portion 130.

  As shown in FIG. 3, the front first elastic body 141 faces the front second elastic body 143 in the x direction. The rear first elastic body 142 faces the rear second elastic body 144 in the x direction. The total elastic force of the front first elastic member 141 and the rear first elastic member 142 and the total elastic force of the front second elastic member 143 and the rear second elastic member 144 are parallel to the x direction. The first concave portion 210 and the second concave portion 310 are moved by substantially the same distance when receiving substantially the same forces opposing each other from the electric wire 101.

  In FIG. 4, a plane parallel to the xy plane passing through the line 5-5 is called a third virtual plane 403, and a plane parallel to the xy plane passing through the line 8-8 is called a fourth virtual plane 404. The fourth virtual plane 404 is orthogonal to the first virtual plane 401 and the second virtual plane 402 shown in FIG. In the fourth virtual plane 404, that is, in a plane parallel to the xy plane, a virtual straight line connecting the first action part 243 and the fourth action part 344 shown in FIG. The intersection of the virtual straight line connecting the three action units 343 is substantially the same as the intersection of the first virtual plane 401 and the second virtual plane 402 shown in FIG.

(Magnetic detection element)
The magnetic detection element 151 shown in FIG. 5 is configured by a magnetoelectric conversion element such as a magnetoresistance effect element and a Hall element. The third virtual plane 403 shown in FIG. 4 is orthogonal to the first virtual plane 401 and the second virtual plane 402 shown in FIG. As shown in FIG. 5, the ten magnetic detection elements 151 are arranged in a plane symmetrical position with the first virtual plane 401 as a plane of symmetry in the third virtual plane 403 (FIG. 4), and the second It is arranged at a plane symmetric position with the virtual plane 402 as a plane of symmetry. The first to fifth magnetic detection elements 151-1 to 151-5 are located on the x1 side of the second virtual plane 402. The sixth to tenth magnetic detection elements 151-6 to 151-10 are located on the x2 side of the second virtual plane 402.

  The first magnetic detection element 151-1 detects a magnetic field in a direction along the sensitivity axis 152-1 indicated by an arrow. The sensitivity axis 152-1 is parallel to the x direction, and the x1 direction is positive. The second to fourth magnetic detection elements 151-2 to 151-4 detect a magnetic field in a direction along the sensitivity axes 152-2 to 152-4 indicated by arrows. The sensitivity axes 152-2 to 152-4 are parallel to the y direction, and the y2 direction is positive. The fifth and sixth magnetic detecting elements 151-5 and 151-6 detect magnetic fields in directions along the sensitivity axes 152-5 and 152-6 indicated by arrows. The sensitivity axes 152-5 and 152-6 are parallel to the x direction, and the x2 direction is positive. The seventh to ninth magnetic detection elements 151-7 to 151-9 detect magnetic fields in directions along the sensitivity axes 152-7 to 152-9 indicated by arrows. The sensitivity axes 152-7 to 152-9 are parallel to the y direction, and the y1 direction is positive. The tenth magnetic detection element 151-10 detects a magnetic field in a direction along a sensitivity axis 152-10 indicated by an arrow. The sensitivity axis 152-10 is parallel to the x direction, and the x1 direction is positive. The example of the arrangement of the magnetic sensing elements shown in FIG. 5 is the same as one of the embodiments described in WO2013 / 128993. Since the present invention can be applied regardless of the position of the magnetic detection element, the magnetic detection element may be arranged at another position.

  As shown in FIG. 4, the first holding unit 120 and the second holding unit 130 are arranged near the fourth virtual plane 404, and the magnetic detection element 151 (FIG. 5) is located near the third virtual plane 403. Are located. That is, the magnetic detection element 151 (FIG. 5) is arranged at a position shifted from the movable range of the first holding unit 120 and the second holding unit 130 in the z direction. The magnetic detection element 151 shown in FIG. 5 is configured to be connectable to the outside by wiring and terminals (not shown).

  Note that the first holding surface 211, the second holding surface 212, the third holding surface 311 and the fourth holding surface 312 are not limited to flat surfaces but may be curved surfaces. The number of the magnetic detection elements 151 may be less than 10, or may be more than 10.

(Summary)
According to this configuration, the first holding surface 211 to the fourth holding surface 312 are arranged symmetrically with respect to the first virtual plane 401 and the second virtual plane 402, and the x direction is maintained while maintaining the symmetry. When the wire 101 is held by the first holding surface 211 to the fourth holding surface 312, the center of the wire 101 becomes constant regardless of the diameter of the wire 101, and the center of the magnetic detection element 151 and the center of the wire 101 are moved. Is kept constant. Therefore, the magnetic field due to the current flowing through the electric wire 101 can be measured under constant measurement conditions regardless of the diameter of the electric wire 101. Further, the first holding part 120 and the second holding part 130 are caused by the elastic force of the front first elastic body 141, the rear first elastic body 142, the front second elastic body 143, and the rear second elastic body 144. Since it moves, the electric wire 101 can be attached to the current sensor 100 without separating the first holding unit 120 and the second holding unit 130 from the housing 110.

  According to this configuration, since the first holding surface 211 to the fourth holding surface 312 are flat, electric wires 101 of various kinds of diameters can be attached with a simple configuration with their centers aligned.

  According to this configuration, since the magnetic detection element 151 and the sensitivity axis are arranged point-symmetrically around the center of the electric wire 101, substantially the same magnetic field is generated by the plurality of magnetic detection elements 151 regardless of the diameter of the electric wire 101. Can be measured.

  According to this configuration, a plurality of elastic bodies, that is, the front first elastic body 141 and the rear first elastic body 142 are provided at different positions in the y direction, and further, another plurality of elastic bodies, that is, the front side Since the second elastic member 143 and the rear second elastic member 144 are provided, only one of the front first elastic member 141 and the rear first elastic member 142 is provided, or the front second elastic member 143 and the rear The movement of the first holding part 120 and the second holding part 130 can be stabilized as compared with the case where only one of the side second elastic bodies 144 is provided.

  According to this configuration, the front first elastic body 141 faces the front second elastic body 143 in the x direction, and the rear first elastic body 142 faces the rear second elastic body 144 in the x direction. Therefore, the first holding unit 120 and the second holding unit 130 are likely to move symmetrically in the x direction.

  According to this configuration, on the third virtual plane 403, a virtual straight line connecting the first action section 243 and the fourth action section 344 and a virtual straight line connecting the second action section 244 and the third action section 343. Since the intersection with the straight line is substantially the same as the intersection between the first virtual plane 401 and the second virtual plane 402, the first holding unit 120 and the second holding unit 130 can easily move symmetrically in the x direction.

  According to this configuration, since the first tapered surface 221 and the second tapered surface 321 are provided, when attaching the electric wire 101, the electric wire 101 is pressed against the first tapered surface 221 and the second tapered surface 321. Thus, the first holding unit 120 and the second holding unit 130 can be smoothly separated from each other.

  According to this configuration, in a state where the electric wire 101 is not attached between the first holding unit 120 and the second holding unit 130, the first opposing surface 222 and the second opposing surface 322 contact each other. The positions of the first holding unit 120 and the second holding unit 130 are stabilized, and breakage can be prevented.

  According to this configuration, the first sliding surface 233 and the first opposing sliding surface 333 overlapping in the z direction can relatively slide in the x direction, and the second sliding surface 234 and the second sliding surface 234 overlapping in the z direction overlap. The second opposing sliding surface 334 is relatively slidable in the x direction, and the third sliding surface 235 and the third opposing sliding surface 335 overlapping in the z direction are relatively slidable in the x direction. is there. Therefore, it is possible to suppress the displacement between the first holding unit 120 and the second holding unit 130 in the z direction while enabling the relative movement of the first holding unit 120 and the second holding unit 130 in the x direction. Thereby, the direction of the electric wire 101 can be kept constant, and the detection accuracy of the magnetic field by the magnetic detection element 151 increases.

  According to this configuration, since the magnetic detection element 151 is disposed at a position shifted from the movable range of the first holding unit 120 and the second holding unit 130 in the z direction, it is possible to reduce the overall size, The magnetic detection element 151 can be arranged close to the electric wire 101 without interfering with the movement of the first holding unit 120 and the second holding unit 130.

  The invention is not limited to the embodiments described above. That is, those skilled in the art may make various changes, combinations, sub-combinations, and alternatives for the components of the above-described embodiments within the technical scope of the present invention or an equivalent scope thereof.

  INDUSTRIAL APPLICABILITY The present invention is applicable to various current sensors that detect current flowing through electric wires having various diameters.

100: current sensor, 101: electric wire, 110: housing, 114: guide path 120: first holding section, 130: second holding section 141: front first elastic body, 142: rear first elastic body 143: front side Second elastic body, 144: rear second elastic body 151: magnetic detecting element, 151-1 to 10 ... first to tenth magnetic detecting element 152-1: first sensitivity axis, 152-2 ... second sensitivity axis , 152-3: third sensitivity axis 210: first concave portion, 211: first holding surface, 212: second holding surface 220: first guide surface, 221: first tapered surface, 222: first opposed surface 233 1st sliding surface, 234 ... 2nd sliding surface, 235 ... 3rd sliding surface 243 ... 1st working part, 244 ... 2nd working part 310 ... 2nd recessed part, 311 ... 3rd holding surface, 312 ... 4 holding surface 320: second guide surface, 321: second tapered surface, 322: second opposing surface 333: first Directional sliding surface, 334: second opposing sliding surface, 335: third opposing sliding surface 343: third operating portion, 344: fourth operating portion 401: first virtual plane, 402: second virtual plane, 403 ... third virtual plane 404 ... fourth virtual plane, 405 ... intersection

Claims (11)

A housing,
A first holding unit movable in a first direction with respect to the housing;
A second holding unit movable in the first direction with respect to the housing;
A first elastic body that elastically supports the first holding unit with respect to the housing;
A second elastic body that elastically supports the second holding unit with respect to the housing;
One or more magnetic sensing elements provided in the housing;
With
The first holding portion includes a first recess,
The second holding portion includes a second recess,
The first recess and the second recess are arranged to face each other,
The first elastic body, when a force for separating the first recess and the second recess is applied to the first holding portion, applies an elastic force for bringing the first recess and the second recess closer to each other. 1 to the holding unit,
The second elastic body, when a force for separating the first concave portion and the second concave portion is applied to the second holding portion, applies an elastic force for bringing the first concave portion and the second concave portion closer to each other. 2 to the holding part,
The first recess has a first holding surface and a second holding surface that hold an electric wire to be detected by the magnetic detection element as a magnetic field,
The second recess has a third holding surface and a fourth holding surface for holding the electric wire,
The first holding surface, the second holding surface, the third holding surface, and the fourth holding surface are parallel to a second direction orthogonal to the first direction;
The first holding surface and the second holding surface are symmetrically arranged around a first virtual plane parallel to the first direction and the second direction,
The third holding surface and the fourth holding surface are symmetrically arranged around the first virtual plane,
The first holding surface and the third holding surface are symmetrically arranged around a second virtual plane orthogonal to the first direction,
The second holding surface and the fourth holding surface are symmetrically arranged around the second virtual plane,
The first elastic body and the second elastic body move the first concave portion and the second concave portion by substantially the same distance by substantially the same force parallel to the first direction and opposite to each other ,
The first holding portion includes a first end,
The first holding portion includes a first guide surface extending between the first end and the first recess,
The second holding portion includes a second end,
The second holding portion has a second guide surface extending between the second end and the second recess;
The first guide surface and the second guide surface face each other, and guide the electric wire from between the first end portion and the second end portion to between the first concave portion and the second concave portion. Define a guideway,
The first guide surface has a first tapered surface near the first end;
The second guide surface has a second tapered surface near the second end;
The first tapered surface and the second tapered surface are opposed to each other;
The distance in the first direction between the first tapered surface and the second tapered surface is larger as approaching the first end and the second end.
Current sensor. The first guide surface includes a first opposing surface parallel to the second imaginary plane between the first concave portion and the first tapered surface,
The second guide surface includes a second opposing surface parallel to the second virtual plane between the second concave portion and the second tapered surface,
In a state where the electric wire is not attached between the first holding portion and the second holding portion, the first and second placement surfaces are arranged at positions where they are in contact with each other,
The current sensor according to claim 1 . A housing,
A first holding unit movable in a first direction with respect to the housing;
A second holding unit movable in the first direction with respect to the housing;
A first elastic body that elastically supports the first holding unit with respect to the housing;
A second elastic body that elastically supports the second holding unit with respect to the housing;
One or more magnetic sensing elements provided in the housing;
With
The first holding portion includes a first recess,
The second holding portion includes a second recess,
The first recess and the second recess are arranged to face each other,
The first elastic body, when a force for separating the first recess and the second recess is applied to the first holding portion, applies an elastic force for bringing the first recess and the second recess closer to each other. 1 to the holding unit,
The second elastic body, when a force for separating the first concave portion and the second concave portion is applied to the second holding portion, applies an elastic force for bringing the first concave portion and the second concave portion closer to each other. 2 to the holding part,
The first recess has a first holding surface and a second holding surface that hold an electric wire to be detected by the magnetic detection element as a magnetic field,
The second recess has a third holding surface and a fourth holding surface for holding the electric wire,
The first holding surface, the second holding surface, the third holding surface, and the fourth holding surface are parallel to a second direction orthogonal to the first direction;
The first holding surface and the second holding surface are symmetrically arranged around a first virtual plane parallel to the first direction and the second direction,
The third holding surface and the fourth holding surface are symmetrically arranged around the first virtual plane,
The first holding surface and the third holding surface are symmetrically arranged around a second virtual plane orthogonal to the first direction,
The second holding surface and the fourth holding surface are symmetrically arranged around the second virtual plane,
The first elastic body and the second elastic body move the first concave portion and the second concave portion by substantially the same distance by substantially the same force parallel to the first direction and opposite to each other ,
The first holding portion has a sliding surface extending in the first direction,
The second holding portion has an opposing sliding surface extending in the first direction,
The sliding surface and the opposing sliding surface overlap in the second direction,
The sliding surface and the opposing sliding surface are disposed so as to be relatively slidable in the first direction.
Current sensor. The first holding surface, the second holding surface, the third holding surface, and the fourth holding surface are flat surfaces;
The current sensor according to claim 1 . Comprising a plurality of the magnetic detection elements,
The plurality of magnetic sensing elements are point symmetric about a point of intersection between the first virtual plane and the second virtual plane in a third virtual plane orthogonal to the first virtual plane and the second virtual plane. Are located in
The sensitivity axis of the magnetic detection element is arranged point-symmetrically around the intersection in the third virtual plane.
The current sensor according to claim 1 . A plurality of the first elastic bodies arranged at different positions in a third direction orthogonal to the first direction and the second direction;
A plurality of the second elastic bodies arranged at different positions in the third direction;
The current sensor according to any one of claims 1 to 5, further comprising: Each of the first elastic bodies faces one of the second elastic bodies in the first direction,
The current sensor according to claim 6 . The first holding portion includes a first operating portion in contact with one of the first elastic members, and a second operating portion in contact with another one of the first elastic members,
The second holding section includes a third action section in contact with one of the second elastic bodies, and a fourth action section in contact with the other one of the second elastic bodies,
In a fourth virtual plane orthogonal to the first virtual plane and the second virtual plane, a virtual straight line connecting the first action section and the fourth action section, and the second action section and the third An intersection with a virtual straight line connecting the action unit is substantially the same as an intersection between the first virtual plane and the second virtual plane.
The current sensor according to claim 6 . The magnetic detection element is arranged at a position shifted from a movable range of the first holding unit and the second holding unit in the second direction.
The current sensor according to claim 1 . A housing,
A first holding unit movable in a first direction with respect to the housing;
A second holding unit movable in the first direction with respect to the housing;
A first elastic body that elastically supports the first holding unit with respect to the housing;
A second elastic body that elastically supports the second holding unit with respect to the housing;
One or more magnetic sensing elements provided in the housing;
With
The first holding portion includes a first recess,
The second holding portion includes a second recess,
The first recess and the second recess are arranged to face each other,
The first elastic body, when a force for separating the first recess and the second recess is applied to the first holding portion, applies an elastic force for bringing the first recess and the second recess closer to each other. 1 to the holding unit,
The second elastic body, when a force for separating the first concave portion and the second concave portion is applied to the second holding portion, applies an elastic force for bringing the first concave portion and the second concave portion closer to each other. 2 to the holding part,
The first recess has a first holding surface and a second holding surface that hold an electric wire to be detected by the magnetic detection element as a magnetic field,
The second recess has a third holding surface and a fourth holding surface for holding the electric wire,
The first holding portion includes a first end,
The first holding portion includes a first guide surface extending between the first end and the first recess,
The second holding portion includes a second end,
The second holding portion has a second guide surface extending between the second end and the second recess;
The first guide surface and the second guide surface face each other, and guide the electric wire from between the first end portion and the second end portion to between the first concave portion and the second concave portion. Define a guideway,
The first guide surface has a first tapered surface near the first end;
The second guide surface has a second tapered surface near the second end;
The first tapered surface and the second tapered surface are opposed to each other;
The distance in the first direction between the first tapered surface and the second tapered surface is larger as approaching the first end and the second end.
Current sensor. A housing,
A first holding unit movable in a first direction with respect to the housing;
A second holding unit movable in the first direction with respect to the housing;
A first elastic body that elastically supports the first holding unit with respect to the housing;
A second elastic body that elastically supports the second holding unit with respect to the housing;
One or more magnetic sensing elements provided in the housing;
With
The first holding portion includes a first recess,
The second holding portion includes a second recess,
The first recess and the second recess are arranged to face each other,
The first elastic body, when a force for separating the first recess and the second recess is applied to the first holding portion, applies an elastic force for bringing the first recess and the second recess closer to each other. 1 to the holding unit,
The second elastic body, when a force for separating the first concave portion and the second concave portion is applied to the second holding portion, applies an elastic force for bringing the first concave portion and the second concave portion closer to each other. 2 to the holding part,
The first recess has a first holding surface and a second holding surface that hold an electric wire to be detected by the magnetic detection element as a magnetic field,
The second recess has a third holding surface and a fourth holding surface for holding the electric wire,
The first holding surface, the second holding surface, the third holding surface, and the fourth holding surface are parallel to a second direction orthogonal to the first direction;
The first holding portion has a sliding surface extending in the first direction,
The second holding portion has an opposing sliding surface extending in the first direction,
The sliding surface and the opposing sliding surface overlap in the second direction,
The sliding surface and the opposing sliding surface are disposed so as to be relatively slidable in the first direction.
Current sensor.

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