JP2017017874A - Coil device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil device capable of facilitating attachment of a lead wire to a groove while accommodating the lead wire at a desired position of the groove with certainty.SOLUTION: A coil device comprises: a lead wire 11 that forms a coil 10; and a holding member that holds the coil 10. The holding member has: a main body part 20; a groove 30 formed on a surface 21a of the main body part 20, and that accommodates the lead wire 11; and at least one projection 40 projected from the main body part 20 toward the groove 30, and that covers a part of the lead wire 11.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a coil device.

  The non-contact power supply system includes a coil device for power transmission and a coil device for power reception, and realizes non-contact power supply using electromagnetic induction or magnetic field resonance between the coils. For example, in the coil device described in Patent Document 1, a wire wound in a planar shape is accommodated in a groove formed on one surface of a planar bobbin. In such a coil device, when the wire is made of a hard material, the wire may be lifted from the groove and may not be accommodated at a desired position of the groove. For such a problem, for example, in the coil device described in Patent Document 2, the wound conductive wire is accommodated in a region surrounded by the bottom plate and the side plate, and the conductive wire is fixed in the region by an adhesive resin. ing.

JP2015-12066A JP 2014-239168 A

  In the coil device as described above, it is required to easily attach the conductive wire to the groove while securely containing the conductive wire in a desired position of the groove portion.

  An object of this invention is to provide the coil apparatus which can make easy attachment of the conducting wire with respect to a groove | channel, while accommodating a conducting wire reliably in the desired position of a groove | channel.

  A coil device according to the present invention is a coil device, and includes a conductive wire that forms a coil and a holding member that holds the coil, and the holding member is formed on the surface of the main body portion and the main body portion. A groove to be accommodated, and at least one protrusion that protrudes from the main body toward the groove and covers a part of the conductor.

  In this coil device, at least one projecting portion that projects from the main body portion toward the groove and covers a part of the conducting wire is provided. Thereby, since the floating from the groove | channel of the conducting wire accommodated in the groove | channel is suppressed, a conducting wire can be reliably accommodated in the desired position of a groove | channel. On the other hand, attachment of the conducting wire to the groove can be easily performed by pushing the conducting wire into the groove while elastically deforming the protruding portion or the conducting wire. Thus, according to the coil device, the conductor can be easily attached to the groove while the conductor is reliably accommodated in a desired position of the groove.

  In the coil device according to the present invention, the at least one protrusion may be a pair of protrusions facing each other across the groove. As a result, even if the conducting wire is close to one of the opposing directions of the projecting portion in the groove, since any projecting portion is located above the conducting wire, the lifting of the conducting wire from the groove is suppressed. The Therefore, the conducting wire can be reliably accommodated in a desired position of the groove.

  In the coil device according to the present invention, the protrusion may be provided at a predetermined position in the winding direction of the conducting wire. Thereby, the length of the protrusion part in the winding direction of conducting wire can be shortened, and the simplification of the structure and cost reduction of the holding member can be realized.

  In the coil device according to the present invention, the conducting wire may be wound in a plane spiral shape. Also in this case, since the protrusion is provided, even if the surface on which the groove is formed is directed downward in the vertical direction, dropping of the conductive wire from the groove is suppressed. Therefore, the conducting wire can be reliably accommodated in a desired position of the groove.

  In the coil device according to the present invention, the conducting wire may be a litz wire. Thereby, the improvement of the power efficiency of non-contact electric power feeding is realizable, accommodating a conducting wire in the desired position of a groove | channel reliably.

  According to the present invention, it is possible to facilitate the attachment of the conducting wire to the groove while reliably housing the conducting wire in a desired position of the groove.

It is a figure which shows the example of application of the coil apparatus which concerns on 1st Embodiment of this invention. It is a perspective view of the coil apparatus which concerns on FIG. It is a disassembled perspective view of the coil apparatus of FIG. It is a top view of a holding member. It is sectional drawing which follows the VV line of FIG. FIG. 5 is an enlarged view of the vicinity of the protruding portion in FIG. 4. It is sectional drawing which follows the VII-VII line of FIG. It is a perspective view of the coil apparatus which concerns on 2nd Embodiment. It is a disassembled perspective view of the coil apparatus of FIG. It is sectional drawing which shows the modification of the protrusion part of the coil apparatus which concerns on 1st and 2nd embodiment. It is sectional drawing which shows the modification of the protrusion part of the coil apparatus which concerns on 1st and 2nd embodiment. It is sectional drawing which shows the modification of the protrusion part of the coil apparatus which concerns on 1st and 2nd embodiment. It is sectional drawing which shows the modification of the protrusion part of the coil apparatus which concerns on 1st and 2nd embodiment. It is sectional drawing which shows the modification of the protrusion part of the coil apparatus which concerns on 1st and 2nd embodiment. It is sectional drawing which shows the modification of the protrusion part of the coil apparatus which concerns on 1st and 2nd embodiment. It is sectional drawing which shows the modification of the protrusion part of the coil apparatus which concerns on 1st and 2nd embodiment. It is sectional drawing which shows the modification of the protrusion part of the coil apparatus which concerns on 1st and 2nd embodiment.

  Hereinafter, first and second embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant descriptions are omitted.

[First Embodiment]
With reference to FIG. 1, the non-contact electric power feeding system 1 to which the coil apparatus of 1st Embodiment was applied is demonstrated. The non-contact power supply system 1 is a system for supplying power from the power transmission device 2 to the power reception device 3. The power transmission device 2 and the power reception device 3 are separated, for example, in the vertical direction. The power transmission device 2 is installed in, for example, a parking lot. The power receiving device 3 is mounted on, for example, an electric vehicle EV. The non-contact power supply system 1 is configured to supply electric power to the electric vehicle EV that has arrived at a parking lot or the like using a magnetic field resonance method or an electromagnetic induction method.

  The power transmission device 2 includes a power transmission coil device 4 for non-contact power feeding provided so as to protrude upward from a road surface such as a parking lot. The power transmission coil device 4 has, for example, a flat rectangular parallelepiped shape or a frustum shape. The power transmission device 2 generates desired AC power from a DC power source or an AC power source and sends the AC power to the power receiving device 3, and further includes a controller, an inverter, and the like (all not shown). The power receiving device 3 includes, for example, a power receiving coil device 5 for non-contact power feeding that is attached to the bottom surface of a vehicle body (chassis or the like) of the electric vehicle EV and faces the power transmitting coil device 4. The receiving coil device 5 has, for example, a flat rectangular parallelepiped shape or a frustum shape. The power receiving device 5 receives power from the power transmitting device 2 and supplies power to a load (for example, a battery), and further includes a controller, a rectifier, and the like (all not shown). Hereinafter, the power transmission coil device 4 and the power receiving coil device 5 are referred to as a coil device 4 and a coil device 5, respectively.

  The coil device 5 will be described with reference to FIGS. The coil device 5 generates an induced current when the magnetic flux generated by the coil device 4 is linked to the coil device 5. In the present embodiment, the coil device 4 adopts the same configuration as the coil device 5, and the description of the coil device 4 is omitted.

  As shown in FIG. 3, the coil device 5 includes a flat base 6, a flat rectangular parallelepiped protective cover 7, a coil 10, a holding member 8, and a ferrite 9. In the accommodation space surrounded by the base 6 and the protective cover 7, the ferrite 9, the holding member 8, and the coil 10 are accommodated in this order from the base 6 side. When the coil device 5 is attached to the electric vehicle EV, for example, the base 6 is fixed to the vehicle body side, and the protective cover 7 faces the coil device 4.

  The base 6 ensures the strength of the coil device 5 and shields leakage flux from flowing out to the outside. The base 6 is made of, for example, a nonmagnetic and conductive material (aluminum or the like).

  The protective cover 7 protects the coil 10, the holding member 8 and the ferrite 9. The protective cover 7 is made of, for example, a nonmagnetic and insulating material (for example, polyphenylene sulfide resin).

  The coil 10 generates an induced current. The coil 10 is formed by a conducting wire 11 wound in a substantially rectangular spiral shape in the same plane, and is a so-called circular type. The circular type is a mode in which the conducting wire 11 is wound in a plane spiral shape, and the shape of the coil 10 viewed from the winding axis direction includes various shapes such as a rectangle, a circle, and an ellipse. As the conducting wire 11, for example, a single wire of copper or aluminum, a litz wire, a bus bar or the like is used. The coil 10 includes a coil body 12 wound in a substantially rectangular spiral shape, a lead part 13 extending from the outermost peripheral end of the coil body 12 through the opening 7a of the protective cover 7, and a coil body. And a lead portion 14 extending from the innermost peripheral end to the outside of the accommodation space through the opening 7 b of the protective cover 7. The lead portions 13 and 14 extend in the same direction. The drawer portions 13 and 14 may extend in different directions.

  The conducting wire 11 is preferably a litz wire. In the non-contact power supply system 1, a high-frequency (for example, kHz order or more) current may be passed through the coil device 4 in order to extend the power transmission distance, improve transmission efficiency, or the like. Generally, the skin effect produced by the conducting wire 11 becomes larger as the current flowing through the conducting wire 11 becomes higher. As the skin effect increases, the resistance at the conductive wire 11 increases and the heat loss increases. The increase in heat loss leads to a decrease in the power efficiency of the entire contactless power feeding system 1 (for example, the ratio of the battery input on the power reception device 3 side to the power output on the power transmission device 2 side). In order to suppress the skin effect, litz wire is used. A litz wire is formed by twisting a plurality of conductor wires insulated from each other.

  The holding member 8 is located between the coil 10 and the base 6. The holding member 8 has a flat plate shape and holds the coil 10 on the surface 21a side of the pair of surfaces 21a and 21b facing each other. The detailed configuration of the holding member 8 will be described later.

  The ferrite 9 is a magnetic body and directs and concentrates the lines of magnetic force generated from the coil 10. The ferrite 9 has a flat plate shape and is located between the holding member 8 and the base 6. The ferrite 9 is held between the holding member 8 and the base 6. The shape and size of the ferrite 9 are substantially equal to, smaller, or larger than the shape and size of the holding member 8 in plan view.

  Next, the detailed configuration of the holding member 8 will be described with reference to FIGS. As shown in FIG. 4, the holding member 8 is formed in a rectangular flat plate-shaped main body 20, a surface 21 a of the main body 20, a groove 30 that accommodates the conductor 11, and the surface 21 a and the groove 30 are connected. And a plurality of pairs of protrusions 40, 40 formed at a position. The surface 21a of the main body 20 faces the top surface 7c of the protective cover 7 (see FIG. 3), and the surface 21b faces the one surface 6a of the base 6 (see FIG. 3). In the present embodiment, the main body portion 20, the groove 30, and the protruding portion 40 are integrally formed.

  The material of the holding member 8 that integrally forms the main body 20, the groove 30, and the protrusion 40 has an electrical insulating property, and when the conductor 11 is pushed into the groove 30, at least one of the protrusion 40 and the conductor 11. A material that can be elastically deformed is selected. That is, the material of the holding member 8 is determined by the relationship with the material of the conducting wire 11. Specifically, when a soft material that can be sufficiently elastically deformed is selected as the material of the conductive wire 11, a material that is as soft as the conductive wire 11 or a material harder than the conductive wire 11 is selected as the material of the holding member 8. The On the other hand, when a hard material that is hard to be elastically deformed is selected as the material of the conductive wire 11, a material that is softer and elastically deformable than the conductive wire 11 is selected as the material of the holding member 8. When a soft material is selected as the material of the holding member 8, for example, silicone is used, and when a hard material is selected, for example, polyphenylene sulfide resin is used.

  The groove 30 has a groove shape wound in a substantially rectangular spiral shape when the surface 21a is viewed in a plan view (viewed through the drawing in FIG. 4). More specifically, as shown in FIG. 4, the groove 30 includes a substantially rectangular spiral groove main body portion 31 that houses the coil main body 12 and a straight groove portion that houses the drawer portion 13 (see FIG. 3). 32 and a straight groove portion 33 that accommodates the drawer portion 14 (see FIG. 3). The groove main body portion 31 and the groove straight portion 32 are formed on the surface 21a, and the groove straight portion 33 is formed on the surface 21b. The groove straight portion 33 communicates with the groove main body portion 31 through the through hole 22.

  The groove main body 31 has a plurality of extending grooves 34a that extend linearly and a plurality of curved grooves 34b that are curved. The groove main body 31 forms a spiral groove by extending the extended grooves 34a and the curved grooves 34b alternately along the winding direction for each circumference.

  Each extending groove 34 a is arranged in parallel along the four sides 23 a, 23 b, 23 c, and 23 d constituting the outer edge of the main body 20. The extending grooves 34a are arranged in parallel with each other at equal intervals from the center of the surface 21a toward the sides 23a, 23b, 23c, and 23d. The curved grooves 34b are arranged in parallel with each other at equal intervals from the center of the surface 21a toward the four corners 24a, 24b, 24c, 24d of the main body 20. The radius of curvature of each curved groove 34b decreases toward the corners 24a, 24b, 24c, 24d.

  The shape of the groove 30 will be described in more detail. As shown in FIG. 5, the shape of the groove 30 in the cross section orthogonal to the axis P of the conducting wire 11 is a U shape in which one side on the protective cover 7 side is opened. The groove 30 is recessed with respect to the surface 21a and has a predetermined depth (a depth longer than the outer diameter c of the conducting wire 11).

  More specifically, the groove 30 has a pair of side surfaces 30a and 30a facing each other, and a bottom surface 30b having a semicircular cross section that connects one ends of the pair of side surfaces 30a and 30a. The pair of side surfaces 30a and 30a are planes parallel to each other, and are connected to the surface 21a at the other end. The pair of side surfaces 30a and 30a are located a apart in a predetermined direction X orthogonal to the axis P of the conducting wire 11 in a direction parallel to the surface 21a. The “predetermined direction X” can also be defined as a direction orthogonal to the extending direction of the groove 30 among the directions parallel to the surface 21a.

  The width of the opening 37 arranged at the position where each side surface 30a and the surface 21a are connected is a. In the present embodiment, the width of the groove 30 is a width a from the opening 37 (the other end of each side surface 30a) to one end of each side surface 30a in the plate thickness direction t of the main body portion 20, and each side surface 30a. The width is narrower along the circular shape of the bottom surface 30b from one end to the bottom surface 30b. The width a of the groove 30 is slightly larger than the outer diameter c of the conducting wire 11. The width a of the groove 30 is longer than the length obtained by adding the maximum tolerance of the outer diameter c to the outer diameter c of the conducting wire 11, and is a width that can accommodate the conducting wire 11.

  As shown in FIG. 7, the pair of projecting portions 40, 40 project toward the predetermined direction X so as to cover a part of the conducting wire 11 at a position where the surface 21 a and the groove 30 are connected. Yes. That is, in the present embodiment, the direction in which the protruding portion 40 protrudes is the predetermined direction X. Further, in the present embodiment, “the protruding portion 40 covers a part of the conductive wire 11” means that the conductive wire 11 is located below the protruding portion 40 when the surface 21 a is viewed in plan (viewed through the paper surface in FIG. 4). Means that a part of is hidden. The pair of protrusions 40 and 40 are provided in the predetermined direction X so as to face each other across the groove 30. Each protrusion 40 is provided at a predetermined position in the winding direction of the conducting wire 11. Specifically, as shown in FIG. 4, each protrusion 40 is located at a central portion in the extending direction of each extending groove 34 a, and each side 23 a, 23 b, 23 c, It is arranged toward each of 23d. That is, the protrusion 40 is provided on a part of the side surface 30a of the groove 30 in the winding direction.

  The configuration of the protrusion 40 will be described in more detail. As shown in FIG. 7, the shape of the protruding portion 40 in the cross section orthogonal to the axis P of the conducting wire 11 is substantially trapezoidal. The protrusion 40 is formed on the side surface 30 a of the groove 30. More specifically, the protrusion 40 is connected to the plane 42 orthogonal to the predetermined direction X, one end of the plane 42, and the plane 43 that is flush with the surface 21 a and the other end of the plane 42. And an inclined surface 44 that is inclined with respect to the plane 42. The flat surface 42 protrudes most toward the other protrusion 40 side in the protrusion 40. The flat surface 43 is continuous with the surface 21 a, and the inclined surface 44 is continuous with the bottom surface 30 b of the groove 30. The pair of projecting portions 40, 40 are symmetric with respect to a center line V parallel to the plate thickness direction t of the main body portion 20.

  Here, the width of the inside of the groove 30 in the predetermined direction X is a, and the width in the predetermined direction X of the opening 38 of the groove 30 formed by the protruding portion 40 (more specifically, a pair of flat surfaces 42, If the distance between 42) is b, then a> b. In addition, when the outer diameter c of the conducting wire 11 is considered, the relationship of a> c> b is established. That is, the width of the groove 30 in the predetermined direction X is narrowed at the place where the protruding portion 40 is present by the protruding portion 40 covering a part of the conductive wire 11.

  As described above, in the coil device 5, the protruding portion 40 that protrudes from the main body portion 20 toward the groove 30 and covers a part of the conductive wire 11 is provided at a position where the surface 21 a and the groove 30 are connected. Yes. Thereby, since the floating of the conducting wire 11 accommodated in the groove 30 from the groove 30 is suppressed, the conducting wire 11 can be reliably accommodated in a desired position of the groove 30. On the other hand, attachment of the conducting wire 11 to the groove 30 can be easily performed by pushing the conducting wire 11 into the groove 30 while elastically deforming the protruding portion 40 or the conducting wire 11. Thus, according to the coil device 5, the conductor 11 can be easily attached to the groove 30 while the conductor 11 is reliably accommodated in a desired position of the groove 30.

  In particular, in the coil device 5, the maximum width inside the groove 30 in a predetermined direction X orthogonal to the axis P of the conducting wire 11 among the directions parallel to the surface 21 a is a, and the opening of the groove 30 formed by the protruding portion 40. If the width of 38 in the predetermined direction X is b, a> b. Thereby, the effect mentioned above can be realized reliably.

  The pair of projecting portions 40, 40 are provided so as to face each other with the groove 30 in between. Thereby, even if the conducting wire 11 is close to one of the opposing directions of the pair of projecting portions 40, 40 in the groove 30, any projecting portion 40 is located above the conducting wire 11. The floating of the conducting wire 11 from the groove 30 is suppressed. Therefore, the conducting wire 11 can be reliably accommodated in a desired position of the groove 30.

  Further, the protruding portion 40 is provided at a predetermined position in the winding direction of the conducting wire 11. Thereby, the full length of the protrusion part 40 in the winding direction of the conducting wire 11 can be shortened, and simplification of the structure and cost reduction of the holding member 8 can be realized.

  The conducting wire 11 is wound in a plane spiral shape. In the present embodiment, the coil device 5 is installed with the surface 21a side facing downward in the vertical direction. In this respect, since the coil device 5 has the protruding portion 40, the fall of the lead wire 11 from the groove 30 due to the gravity is suppressed. That is, the drop of the conducting wire 11 from the groove 30 is suppressed regardless of the installation state of the coil device 5. Therefore, the conductive wire can be reliably accommodated in a desired position of the groove 30.

  Further, the protruding portion 40 is formed integrally with the main body portion 20. Therefore, it is not necessary to separately prepare an adhesive resin or the like, and the structure of the coil device 5 can be simplified and the cost can be reduced.

  Moreover, when removing the conducting wire 11 from the groove 30 for the purpose of maintenance of the coil device 5 or the like, the conducting wire 11 can be easily pulled out from the groove 30 while elastically deforming the protruding portion 40 or the conducting wire 11.

  Moreover, the conducting wire 11 is a litz wire. As described above, the litz wire is an assembly of strands. When the conducting wire 11 is wound around the holding member 8, the force applied to the conducting wire 11 becomes non-uniform depending on the location of the conducting wire 11, so that the strands may be untwisted. In the present embodiment, due to the presence of the protrusion 40, even if the litz wire is unwound, a part of the strand is caught by the protrusion 40 and is held in the groove 30. For this reason, the power efficiency of the non-contact power feeding can be improved while the conductor 11 is reliably accommodated in the desired position of the groove 30.

[Second Embodiment]
Next, a second embodiment will be described with reference to FIGS. The coil 10 according to the first embodiment is a circular type in which the conducting wire 11 is wound in a substantially rectangular spiral shape within the same plane. However, the coil 110 according to the present embodiment has the conducting wire 111 spirally three-dimensionally. It is a solenoid type wound around. The shape of the coil 110 includes various shapes such as a flat quadrangular cylindrical shape, a cylindrical shape, and an elliptical cylindrical shape as long as the conducting wire 111 is spirally wound.

  More specifically, the coil device 5 of the second embodiment includes a coil 110 made of a conductive wire 111 spirally wound in the axial direction L, instead of the spiral coil 10, and has a flat plate shape. Instead of the holding member 8, a pair of holding members 140 and 150 are provided which are combined to form a rectangular tube shape and around which the coil 110 is wound. These points are different from the coil device 5 of the first embodiment. The coil 110, the pair of holding members 140 and 150, and the ferrite 9 are accommodated in an internal space closed by the holding members 140 and 150. The pair of holding members 140 and 150 face each other in the facing direction of the coil device 4 and the coil device 5. The surface 141 of the holding member 140 faces a base (not shown), and the surface 151 of the holding member 150 faces a protective cover (not shown). The ferrite 9 is sandwiched and held between a pair of holding members 140 and 150.

  A groove 30 for accommodating the coil 110 is formed on the surfaces 141 and 151 of the pair of holding members 140 and 150. The grooves 30 are formed in a spiral shape in the axial direction L of the coil 110 in parallel with each other and at equal intervals. At a position where the surfaces 141 and 151 and the groove 30 are connected, a plurality of pairs of protrusions 40 and 40 are formed, and each protrusion 40 protrudes in a direction to close the groove 30. Each protrusion 40 is provided at a predetermined position in the winding direction of the conducting wire 111. Specifically, the protrusions 40 are arranged along the axial direction L at the center of each of the surfaces 141 and 151. The shape of the protrusion 40 is the same as that of the first embodiment (see FIG. 7).

  As described above, also in the present embodiment, the above effect, that is, the effect that the conductor 111 can be easily attached to the groove 30 while the conductor 111 is reliably accommodated in a desired position of the groove 30. Play.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

  For example, in the above embodiment, the shape of the protruding portion 40 in the cross section orthogonal to the axis P of the conducting wire 11 (, 111) is substantially trapezoidal. However, as shown in FIG. Further, it may be tapered toward the groove 30 side. In this case, when the conducting wire 11 is attached to the groove 30, the projecting portion 40 is more easily deformed, so that the conducting wire 11 can be more easily attached to the groove 30.

  Moreover, in the said embodiment, although a pair of protrusion part 40 and 40 which opposes each other on both sides of the groove | channel 30 was provided, as FIG. 11 shows, the protrusion part 40 may be provided only in the one side. . That is, at least one protrusion 40 may be provided. Thereby, compared with the case where a pair of protrusion parts 40 and 40 are provided, the structure of the holding member 8 can be simplified. When the circular coil 10 is held by the holding member 8, the conducting wire 11 is wound around the groove 30 by applying a force toward the coil center. Therefore, the conducting wire 11 is pressed against the side surface 30 a of the groove 30 on the coil center side. Since the conducting wire 11 is positioned closer to the coil center side of the groove 30, the protrusion 40 is preferably provided only on the side surface 30 a of the groove 30 on the coil center side. Thereby, the conducting wire 11 can be more reliably accommodated in a desired position of the groove 30.

  In the above embodiment, the pair of protrusions 40 and 40 are symmetrical with respect to the center line V (see FIG. 7), but as shown in FIG. It may be asymmetrical. For example, in the circular type coil 10, when the conducting wire 11 is likely to be moved closer to the inner peripheral side of the groove 30 due to bending of the conducting wire 11, the protruding amount of the inner peripheral side protruding portion 40 may be increased. Thereby, the conducting wire 11 can be more reliably accommodated in a desired position of the groove 30.

  Further, as shown in FIG. 13, an escape groove 160 that is recessed in the thickness direction t may be provided in the vicinity of the protruding portion 40 on the surface 21 a. Thereby, even if the protrusion 40 is difficult to elastically deform because the holding member 8 is formed of a hard material, the protrusion 40 is easily elastically deformed because the escape groove 160 is provided. Therefore, attachment of the conducting wire 11 to the groove 30 can be facilitated.

  As shown in FIG. 14, for example, when the material of the holding member 8 is relatively soft, the width b in the predetermined direction X of the opening 38 of the groove 30 formed by the pair of protrusions 40, 40 may be zero. Good. In this case, since the conducting wire 11 can be more reliably suppressed by the protruding portion 40, the conducting wire 11 can be more reliably accommodated in a desired position of the groove 30. Further, when the surface 21a is viewed in a plan view (viewed through the drawing direction in FIG. 4), the pair of protrusions 40 and 40 may overlap each other.

  Moreover, in the said embodiment, although the plane 43 of the protrusion part 40 was flush | level with the surface 21a (refer FIG. 7), as FIG. 15 shows, the protrusion part 40 is upwards rather than the surface 21a. It may be protruding. Thereby, the design freedom of the protrusion part 40 can be improved.

  Further, the protruding portion 40 is not limited to being formed at a position where the surface 21a and the groove 30 are connected to each other, as long as the protruding portion 40 protrudes from the main body portion 20 toward the groove 30 and covers a part of the conductive wire 11. For example, as shown in FIG. 16, it may be provided on the side surface 30 a inside the groove 30.

  Further, “the protruding portion 40 covers a part of the conducting wire 11” is not limited to the presence of a gap between the protruding portion 40 and the conducting wire 11, and as shown in FIG. 11 includes being caught by the protruding portion 40 in a state where the wire 11 is caught and the lead wire 11 is deformed.

  Moreover, in the said embodiment, although the protrusion part 40 was provided in the predetermined position in the winding direction of the conducting wire 11, you may provide in the whole region in the winding direction. Moreover, the protrusion part 40 may be provided in the curved groove 34b instead of the extending groove 34a. In the second embodiment, the protrusion 40 is provided on each of the surfaces 141 and 151 of the holding members 140 and 150, but is provided only on one surface (for example, the surface 141 on the lower side in the vertical direction). It may be.

  Moreover, the protrusion part 40 may be provided in the groove | channel linear part 32 and 32 (refer FIG. 4) which accommodates the drawer | drawing-out parts 13 and 14. FIG. In this case, it is possible to suppress a decrease in performance of the coil device 5 caused by the pulling portions 13 and 14 being unintentionally pulled.

  Moreover, in the said embodiment, although the curvature radius of each curved groove 34b became small as it went to each corner | angular part 24a, 24b, 24c, 24d, even if the curvature radius of each curved groove 34b is mutually the same, for example. Good.

  Moreover, in the said embodiment, although the main-body part 20, the groove | channel 30, and the protrusion part 40 were integrally formed, the protrusion part 40 is a different body from the main-body part 20 and the groove | channel 30, for example, and it is a post process. It may be attached to the main body 20.

  Moreover, in the said embodiment, although the shape of the groove | channel 30 was U shape, a rectangular shape etc. may be sufficient, for example. In the above embodiment, the pair of side surfaces 30a and 30a constituting the groove 30 are planes parallel to each other. For example, a tapered surface is formed so that the width of the groove 30 becomes narrower as the bottom surface 30b is approached. It may be. In this case, the width of the groove 30 in the X direction is the maximum width a at the opening 37 and becomes narrower as it approaches the bottom surface 30b.

  In the above embodiment, the direction in which the protruding portion 40 protrudes is the predetermined direction X. However, the direction is not limited to this, and when the surface 21a is viewed in plan (viewed through the drawing in the drawing of FIG. 4), the groove What is necessary is just the direction where the protrusion part 40 protrudes toward the center side (further, the other protrusion part 40 side) of 30. Therefore, the case where the protrusion 40 protrudes obliquely above the surface 21a toward the center of the groove 30 is also included. Furthermore, the case where the protrusion part 40 protrudes in the other protrusion part 40 side rather than the center of the groove | channel 30 is also included.

  Moreover, although the said embodiment demonstrated the case where this invention was applied to both the coil apparatuses 4 and 5, it is not restricted to this. The present invention may be applied to any one of the power transmission coil device 4 and the power reception coil device 5. Moreover, although the said embodiment demonstrated the case where the coil apparatus of this invention was applied to a non-contact electric power feeding system, it is not limited to a non-contact electric power feeding system, For example, the coil apparatus of this invention is an induction heating system. And may be applied to eddy current flaw detection systems.

DESCRIPTION OF SYMBOLS 1 Non-contact electric power feeding system 2 Power transmission apparatus 3 Power receiving apparatus 4 Coil apparatus (power transmission coil apparatus)
5 Coil device (receiving coil device)
6 Base 6a One surface 7 Protective cover 7a, 7b Opening 7c Top surface 8 Holding member 9 Ferrite 10 Coil 11 Conductor 12 Coil main body 13, 14 Drawer 20 Main body 21a, 21b Surface 22 Through-holes 23a-23d Sides 24a-24d Square Portion 30 groove 30a side surface 30b bottom surface 31 groove main body portion 32, 33 groove straight portion 34a extending groove 34b bent groove 37, 38 opening 40 projecting portion 42, 43 flat surface 44 inclined surface 110 coil 111 conducting wire 140 holding member 141 surface 150 holding member 151 Surface 160 Relief groove

Claims (5)

A coil device,
A conductor forming a coil;
A holding member for holding the coil,
The holding member is
The main body,
A groove formed on the surface of the main body and accommodating the conducting wire;
A coil device, comprising: at least one projecting portion projecting from the main body portion toward the groove and covering a part of the conducting wire.   The coil device according to claim 1, wherein the at least one protrusion is a pair of the protrusions facing each other across the groove.   The coil device according to claim 1, wherein the protrusion is provided at a predetermined position in a winding direction of the conducting wire.   The coil device according to claim 1, wherein the conducting wire is wound in a plane spiral shape.   The coil device according to any one of claims 1 to 4, wherein the conducting wire is a litz wire.

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