WO2019021783A1 - Antenna coil and method for manufacturing same - Google Patents

Antenna coil and method for manufacturing same Download PDF

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Publication number
WO2019021783A1
WO2019021783A1 PCT/JP2018/025490 JP2018025490W WO2019021783A1 WO 2019021783 A1 WO2019021783 A1 WO 2019021783A1 JP 2018025490 W JP2018025490 W JP 2018025490W WO 2019021783 A1 WO2019021783 A1 WO 2019021783A1
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WO
WIPO (PCT)
Prior art keywords
magnetic core
antenna coil
resin
curing
bobbin
Prior art date
Application number
PCT/JP2018/025490
Other languages
French (fr)
Japanese (ja)
Inventor
憲嗣 内藤
裕子 大塩
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to CN201880047340.6A priority Critical patent/CN110892582B/en
Priority to JP2019532478A priority patent/JP6881584B2/en
Publication of WO2019021783A1 publication Critical patent/WO2019021783A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
    • H01Q7/08—Ferrite rod or like elongated core

Definitions

  • the present invention relates to an antenna coil and a method of manufacturing the same.
  • an antenna coil for transmitting information or power at a short distance using an electromagnetic wave of a predetermined frequency is known (see, for example, Patent Document 1).
  • the antenna coil of Patent Document 1 includes a magnetic core (first magnetic core) and a coil wound around the magnetic core.
  • magnetic pieces second magnetic cores
  • the inductance value of the coil is adjusted to approach a value corresponding to the resonant frequency of the antenna coil.
  • the position of the magnetic piece is fixed using an adhesive or the like.
  • an object of the present invention is to solve the above-mentioned problems, and to provide an antenna coil capable of precisely adjusting the inductance value of the coil and a method of manufacturing the same.
  • a first magnetic core, a coil wound around the first magnetic core, and relative to the first magnetic core are used.
  • Preparing an antenna coil comprising a second magnetic core, the position of which can be adjusted, and setting the inductance value of the coil closer to the inductance value corresponding to the resonance frequency After the position adjusting step of adjusting the relative position of the second magnetic core and the position adjusting step, the light beam is irradiated to the resin containing the photocurable resin disposed around the second magnetic core.
  • a first curing step of curing at least the exposed surface of the photocurable resin, and an uncured portion of the resin containing the photocurable resin after the first curing step The and a second curing step of curing by the curing methods other than the light-curing.
  • the antenna coil according to the present invention comprises a first magnetic core, a coil wound around the first magnetic core, and a second magnetic core, and the second magnetic core is It fixes with what hardened
  • the inductance value of the coil can be adjusted with high accuracy.
  • Plan view of the antenna coil of the first embodiment Side view of the antenna coil of Embodiment 1
  • the perspective view of the antenna coil of Embodiment 1 A perspective view showing a first magnetic core and a second magnetic core of Embodiment 1 Top view showing the second magnetic core of the first embodiment
  • the figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1. The figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1.
  • the figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1. The figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1.
  • the figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1. The figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1.
  • the figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1. The figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1.
  • the figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1 The top view which shows the accommodating part of the bobbin by modification 1
  • the first magnetic core, the coil wound around the first magnetic core, and the second position adjustable relative to the first magnetic core Preparing an antenna coil comprising a magnetic core, and relating the second magnetic core relative to the first magnetic core such that the inductance value of the coil approaches the inductance value corresponding to the resonant frequency.
  • the light curing is performed by irradiating a light beam to a resin containing a photocurable resin disposed around the second magnetic substance core.
  • the uncured portion of the resin containing the photocurable resin is cured by a curing method other than photocuring Comprising a second curing step, and to provide a manufacturing method of the antenna coil.
  • the uncured portion is cured by a method other than the photocuring method to fix the second magnetic core.
  • the second magnetic core is positioned with high accuracy while suppressing the positional deviation of the second magnetic core as compared with the case where the second magnetic core is fixed using an adhesive or the like having only a thermosetting property. It is possible to adjust the inductance value of the coil with high accuracy.
  • the photocurable resin is a thermosetting resin
  • the resin containing the photocurable resin further includes a thermosetting resin
  • the second curing step includes: The manufacturing method of the antenna coil as described in a 1st aspect which hardens
  • the second curing step by performing the second curing step by heat curing, it is possible to cure the uncured portion of the resin faster than in the case of leaving without applying heat or the like.
  • the exposed surface of the resin is cured in the first curing step, even when heat is used in the second curing step, the positional deviation of the second magnetic core due to the influence of thermal expansion and the like is suppressed. Thereby, the second curing step can be performed quickly while positioning the second magnetic core with high accuracy.
  • the manufacturing of the antenna coil as described in the second aspect further comprising a moving step of moving the antenna coil to a heating chamber between the first curing step and the second curing step.
  • a moving step of moving the antenna coil to a heating chamber between the first curing step and the second curing step Provide a way.
  • the second curing step is performed in the heating chamber, and the first curing step is performed in a place different from the heating chamber, so that the resin is cured in the place suitable for each curing step. be able to.
  • the exposed surface of the resin is cured in the first curing step, even when the antenna coil is moved between the first curing step and the second curing step, the positional deviation of the second magnetic core due to the movement is suppressed. be able to.
  • the photocurable resin is an ultraviolet curable resin
  • the light beam used in the first curing step is ultraviolet light.
  • the present invention provides a method of manufacturing an antenna coil. According to such a method, a general-purpose resin can be used by using an ultraviolet curable resin as the photocurable resin, and the manufacturing cost of the antenna coil can be reduced.
  • a bobbin accommodating the first magnetic body core and the second magnetic body core is further provided, the coil is wound around the body of the bobbin, and the bobbin is mounted on the bobbin.
  • the method of manufacturing an antenna coil as described in the fifth aspect wherein the bobbin provided with a light beam path at an end edge portion of the accommodating portion is used as the bobbin.
  • the resin in the housing portion by providing a light beam path at the end edge portion of the housing portion, it becomes easy to irradiate the light beam to the resin in the housing portion, and the resin can be cured in a wider range in the first curing step. it can. Thereby, the positioning accuracy of the second magnetic core by the first curing step can be improved.
  • the antenna coil as described in the fifth aspect or the sixth aspect wherein a material having a higher light reflectivity than the material constituting the inner wall surface is attached to the inner wall surface of the housing portion.
  • the method of manufacturing an antenna coil according to any one of the fifth to seventh aspects wherein the surface roughness Ra of the inner wall surface of the housing portion is set to 100 or less.
  • the photocurable resin can be cured in a wider range, and the positioning accuracy of the second magnetic core in the first curing step can be improved.
  • the method of manufacturing an antenna coil according to any one of the fifth to eighth aspects wherein the color of the inner wall surface of the housing portion is white. According to such a method, since the light beam is easily reflected in the housing portion, the photocurable resin can be cured in a wider range, and the positioning accuracy of the second magnetic core in the first curing step can be improved. Can.
  • a first magnetic core, a coil wound around the first magnetic core, and a second magnetic core, the second magnetic core comprising An antenna coil is provided, wherein a resin including a photocurable resin disposed around the periphery thereof is fixed with a cured resin.
  • the antenna coil by fixing the second magnetic core with the resin by the photo-curing method.
  • positional deviation of the second magnetic core is less likely to occur, and the inductance value of the coil can be accurately adjusted.
  • the antenna coil can be manufactured by any of the manufacturing methods.
  • the antenna according to the tenth aspect wherein the photocurable resin is a thermosetting resin, or the resin containing the photocurable resin further includes a thermosetting resin.
  • the antenna coil can be manufactured by the method of curing the resin by the thermosetting method and fixing the second magnetic core after performing the photocuring method. According to such a method, it is possible to cure the uncured portion of the resin faster than in the case where it is left without applying heat after photocuring.
  • the antenna coil according to the tenth aspect or the eleventh aspect wherein the photocurable resin is an ultraviolet curable resin.
  • the photocurable resin is an ultraviolet curable resin.
  • a bobbin for housing the first magnetic body core and the second magnetic body core, the coil is wound around the body portion of the bobbin, and the bobbin is
  • the present invention provides the antenna coil according to any one of the tenth to twelfth aspects, wherein a concave housing portion for housing the second magnetic body core is provided. According to such a configuration, by providing the bobbins accommodating the two cores of the first magnetic body core and the second magnetic body core, the workability at the time of handling the antenna coil can be improved.
  • the antenna coil according to the thirteenth aspect wherein the bobbin is provided with a light beam path at an end edge portion of the housing portion.
  • the bobbin is provided with a light beam path at an end edge portion of the housing portion.
  • the antenna coil as set forth in the thirteenth aspect or the fourteenth aspect, wherein a material having a higher light reflectivity than the material constituting the inner wall surface is attached to the inner wall surface of the housing portion.
  • a material having a higher light reflectivity than the material constituting the inner wall surface is attached to the inner wall surface of the housing portion.
  • the antenna coil according to any one of the thirteenth to fifteenth aspects, wherein the surface roughness Ra of the inner wall surface of the housing portion is set to 100 or less. According to such a configuration, since the light beam is easily reflected in the housing portion, the photocurable resin can be cured in a wider range, and the positioning accuracy of the second magnetic core can be improved. An antenna coil can be manufactured.
  • the antenna coil according to any one of the thirteenth to sixteenth aspects, wherein the color of the inner wall surface of the housing portion is white. According to such a configuration, since the light beam is easily reflected in the housing portion, the photocurable resin can be cured in a wider range, and the positioning accuracy of the second magnetic core can be improved. An antenna coil can be manufactured.
  • FIG. 1 is a plan view of the antenna coil 2 of the first embodiment
  • FIG. 2 is a side view of the antenna coil 2
  • FIG. 3 is a perspective view of the antenna coil 2.
  • the antenna coil 2 in the first embodiment is a communication component used in a system for transmitting information at a short distance using electromagnetic waves of a predetermined frequency (for example, about 125.0 kHz).
  • the antenna coil 2 is mounted and used in a car as a communication component for keyless entry of the car, for example.
  • the antenna coil 2 shown in FIGS. 1 to 3 includes a first magnetic core 4, a second magnetic core 6, a coil 8 and a bobbin 10.
  • the first magnetic core 4 and the second magnetic core 6 are members made of a magnetic material such as ferrite (ferrite core).
  • the first magnetic core 4 and the second magnetic core 6 are housed in the bobbin 10.
  • the first magnetic core 4 is positioned and fixed by the bobbin 10.
  • the positioning resin 14 (FIG. 6F) is disposed around the second magnetic core 6 in a cured state.
  • the second magnetic core 6 is positioned by the cured resin 14.
  • FIG. 4 A state in which only the first magnetic core 4 and the second magnetic core 6 are illustrated is shown in FIG.
  • the first magnetic core 4 in the first embodiment is configured in a bar shape.
  • the second magnetic core 6 is formed in a substantially columnar shape whose size is significantly smaller than that of the first magnetic core 4.
  • FIG. 5 A plan view of the second magnetic core 6 is shown in FIG. As shown in FIG. 5, as the second magnetic core 6 in the first embodiment, one having a dimension A in the longitudinal direction different from a dimension B in the lateral direction in plan view is used. By rotating the second magnetic core 6 in the R direction shown in FIGS. 4 and 5, the relative position to the first magnetic core 4 is changed.
  • the coil 8 shown in FIGS. 1 to 3 is a conductor coil (winding) wound around the first magnetic core 4. As shown in FIGS. 1 and 3, the coil 8 of the first embodiment is wound around the body of the bobbin 10 and is not in direct contact with the first magnetic core 4.
  • the first magnetic core 4 is disposed inside the coil 8.
  • the second magnetic core 6 is disposed in the vicinity of the first magnetic core 4 and the coil 8.
  • the coil 8 has an inductance value corresponding to the positions of the first magnetic core 4 and the second magnetic core 6 disposed inside and near the coil 8.
  • the inductance value of the coil 8 is adjusted to approach a value corresponding to a predetermined resonance frequency (for example, 125.0 kHz) in the antenna coil 2.
  • the coil 8 is adjusted by adjusting the rotational position of the second magnetic core 6 shown in FIG. 5 and the like, and changing the relative position of the second magnetic core 6 with respect to the first magnetic core 4.
  • the inductance value of is adjusted.
  • the second magnetic core 6 is disposed in the vicinity of the first magnetic core 4 and the coil 8 within a range in which the inductance value of the coil 8 can be adjusted. The specific adjustment method will be described later.
  • the bobbin 10 is a case member that accommodates the first magnetic core 4 and the second magnetic core 6.
  • the bobbin 10 is a substantially cylindrical member that forms a space that can accommodate the first magnetic core 4 and the second magnetic core 6.
  • the bobbin 10 is formed of an insulating material such as plastic (black plastic in the first embodiment).
  • the bobbin 10 is provided with a housing portion 12 for housing the second magnetic core 6.
  • the housing portion 12 in the first embodiment is a recess in which the upper surface of the bobbin 10 is recessed downward.
  • the second magnetic core 6 and the resin 14 (FIG. 1) hardened around the second magnetic core 6 are disposed in the housing 12, and the second magnetic core 6 is positioned in the housing 12. ⁇ It is held.
  • the antenna coil 2 is prepared (step S1: preparation step). Specifically, the antenna coil 2 before arranging the resin 14 in the configuration shown in FIGS. 1 to 3 is prepared.
  • the antenna coil 2 shown in FIG. 6A includes a first magnetic core 4, a second magnetic core 6, a coil 8, and a bobbin 10.
  • the second magnetic core 6 is accommodated in the accommodating portion 12, and the accommodating portion 12 is not filled with the resin 14.
  • step S2 resin placement step
  • the resin 14 is filled in the housing portion 12 housing the second magnetic core 6.
  • the resin 14 is disposed around the second magnetic core 6.
  • resin 14 liquid resin before hardening is used.
  • FIG. 6B shows a state in which the second magnetic core 6 is moved upward for the sake of convenience.
  • the second magnetic core 6 is movable while being in contact with the liquid resin 14 before curing.
  • the resin 14 a resin having both “ultraviolet curable” and “thermo curable” characteristics is used.
  • curing is performed through a two-step curing step of a first curing step S 4 by ultraviolet curing described later and a second curing step S 6 by thermal curing. Is possible.
  • Such resin 14 may be made of, for example, a plurality of types of resins in which an ultraviolet curable resin and a thermosetting resin are mixed. Alternatively, it may be one kind of resin having both of the functions of ultraviolet curing and thermosetting.
  • Step S3 position adjustment step
  • the second magnetic substance core 6 in the first rotational position is in the R direction Rotate to.
  • the 2nd magnetic material core 6 is arrange
  • the rotational position of the second magnetic core 6 By changing the rotational position of the second magnetic core 6, the relative position of the second magnetic core 6 to the first magnetic core 4 changes.
  • the inductance value of the coil 8 wound around the second magnetic core 6 changes around the first magnetic core 4.
  • the rotational position of the second magnetic core 6 is adjusted such that the inductance value of the coil 8 becomes an inductance value corresponding to a predetermined resonance frequency.
  • step S4 temporary curing of the resin 14 is performed (step S4: first curing step). Specifically, the resin 14 is cured by an ultraviolet curing method using ultraviolet light. More specifically, as shown in FIG. 6E, the ultraviolet ray irradiation unit 16 disposed above the accommodation unit 12 irradiates the accommodation unit 12 with the ultraviolet light 18.
  • the resin 14 in the housing portion 12 is partially cured. Specifically, as shown in the vertical cross-sectional view of FIG. 6F, the upper portion of the resin 14 including the exposed surface 20 is cured to be a cured portion 22. The lower portion of the resin 14 is not cured by blocking the ultraviolet light 18 by the cured portion 22, and becomes an uncured portion 24.
  • the second magnetic core 6 can be positioned.
  • the resin 14 is cured to an extent necessary to suppress the displacement of the second magnetic core 6.
  • the irradiation time of the ultraviolet light 18 in the first curing step S4 may be appropriately set according to the type of the resin 14, the intensity of the ultraviolet light 18, and the like.
  • the first curing step S4 is an ultraviolet curing method using ultraviolet rays 18, it is carried out at normal temperature. As described above, since the antenna coil 2 is not heated, it is possible to prevent the rotational position of the second magnetic core 6 from being shifted by deformation of the bobbin 10 and the like constituting the housing portion 12 due to thermal expansion. Can. Thereby, positioning of the 2nd magnetic body core 6 can be performed with sufficient accuracy.
  • a UV curable resin is used particularly among the photocurable resins, so that a general purpose resin can be used, and the manufacturing cost of the antenna coil 2 can be reduced.
  • the first curing step S4 described above is performed while maintaining the position and the orientation of the antenna coil 2 without moving the antenna coil 2 from the position adjustment step S3. That is, the first curing step S4 is performed in a state in which the second rotational position of the second magnetic core 6 is maintained. In this manner, the positional deviation of the second magnetic core 6 can be suppressed at the transition from the position adjustment step S3 to the first curing step S4.
  • the time interval from the completion of the position adjustment step S3 to the execution of the first curing step S4 is set to a short time.
  • the antenna coil 2 is moved (step S5: moving step). Specifically, as shown in FIG. 6G, the antenna coil 2 is moved from the ultraviolet irradiation chamber 28 in which the ultraviolet irradiation unit 16 was provided to the heating chamber 26 located at a different place from the ultraviolet irradiation chamber 28 (arrow C ).
  • a transport unit 32 for example, a robot arm
  • the heating chamber 30 is provided with a heating unit 30 (for example, a heater) capable of heating the resin 14 of the antenna coil 2.
  • the antenna coil 2 is arranged horizontally (horizontally placed) in the ultraviolet irradiation chamber 28, whereas the antenna coil 2 is vertically arranged in the heating chamber 26 to promote the heating of the resin 14. Arrange (vertically). As described above, according to the movement step S5 of the first embodiment, not only the position of the antenna coil 2 but also the direction thereof is changed.
  • the resin 14 is partially cured by the above-described first curing step S4 with respect to the change of the position and the orientation of the antenna coil 2 as described above, and the second magnetic core 6 is positioned. Therefore, position shift of the 2nd magnetic substance core 6 accompanying change of a position and direction of antenna coil 2 can be controlled. Thus, the inductance value of the coil 8 can be adjusted with high accuracy.
  • step S6 main curing of the resin 14 is performed (step S6: second curing step). Specifically, the resin 14 is cured by a curing method different from the ultraviolet curing method of the first curing step S4.
  • the resin 14 is cured by a thermal curing method using the heating means 30.
  • the resin 14 of the antenna coil 2 is heated using the heating means 30 (for example, at 100 ° C. for one hour).
  • the uncured portion 24 of the resin 14 shown in FIG. 6F is cured.
  • the second curing step S6 uses the heat not utilized in the first curing step S4, curing is performed up to the uncured portion 24 on the lower side of the resin 14 which the ultraviolet rays 18 did not reach in the first curing step S4. It can be done.
  • the entire resin 14 is cured.
  • the rotational position of the second magnetic core 6 is firmly positioned and fixed.
  • a highly reliable holding strength for the second magnetic core 6 can be realized.
  • the “hard curing method” is not cured as compared with the case where the uncured portion 24 is cured by being left without applying heat. Portions 24 can be cured faster. Further, since the exposed surface 20 of the resin 14 is cured in the first curing step S4, even when heat is used in the second curing step S6, the positional deviation of the second magnetic core 6 due to the influence of thermal expansion and the like is suppressed Be done. Thus, the second curing step can be completed quickly while positioning the second magnetic core 6 with high accuracy.
  • the apparatus configuration suitable for each step of the first curing step and the second curing step can be obtained, and each step is accurate. It can be done well.
  • the resin 14 having the characteristics of both UV curing and thermosetting is cured by the UV curing method and then cured by the UV curing method.
  • the second magnetic core 6 is fixed by further curing. According to such a method, compared to the case where the second magnetic core 6 is fixed using a silicon adhesive or the like having only a thermosetting property, after the position adjustment of the second magnetic core 6 Misalignment can be suppressed, and the inductance value of the coil 8 can be accurately adjusted. Thereby, the antenna coil 2 having a desired frequency with a small tolerance from the resonance frequency can be manufactured.
  • the second magnetic body core 6 is fixed using an adhesive having only the thermosetting property.
  • the tolerance of the frequency of the antenna coil 2 can be reduced to half or less.
  • Modification 1 The accommodating part 40 by the modification 1 is shown in FIG. In FIG. 7, the second magnetic core 6 and the resin 14 are omitted, and only the housing portion 40 is illustrated.
  • the accommodating portion 40 according to the first modification is provided with a recessed portion 44 by indenting the end edge portion 42 located at the upper end of the accommodating portion 40 inward.
  • the recess 44 functions as an additional light beam path for guiding the ultraviolet light 18 described above to the housing 40.
  • the ultraviolet rays 18 described above can be irradiated to a wider range of the resin 14.
  • the resin 14 can be cured in a wider range in the first curing step S4, and the positioning accuracy of the second magnetic core 6 in the first curing step S4 can be improved.
  • the recessed part 44 is divided and provided in three places in the example shown in FIG. 7, the number of a recessed part 44, a place, and a magnitude
  • the light beam path may be provided by any method such as providing a notch in the containing portion 40 or providing a through hole.
  • Modification 2 The accommodating part 50 by the modification 2 is shown in FIG. Similarly, in FIG. 8, the second magnetic core 6 and the resin 14 are not shown.
  • the housing portion 50 has an inner wall surface 52, and the inner wall surface 52 constitutes the bottom and side surfaces of the housing portion 50.
  • the surface roughness Ra of the inner wall surface 52 is set to 100 or less.
  • the resin 14 can be cured in a wider range. Thereby, the positioning accuracy of the 2nd magnetic material core 6 by 1st hardening step S4 can be improved.
  • the surface roughness of the inner wall surface 52 of the housing portion 50 is set, for example, by selecting the material forming the inner wall surface 52 as one having a low surface roughness, or by performing processing to make the surface of the inner wall surface 52 smooth. It may be realized.
  • Modification 3 Although the modification 2 shown in FIG. 8 describes the case where the surface roughness of the inner wall 52 is set, the present invention is not limited to such a case, and it is more reflective than the material (for example, plastic) constituting the inner wall 52. A high material may be adhered and welded to the inner wall surface 52. Even in such a case, since the ultraviolet rays 18 are easily reflected in the housing portion 50, the resin 14 can be cured in a wider range, and the positioning accuracy of the second magnetic core 6 in the first curing step S4 Can be improved.
  • the material for example, plastic
  • the entire bobbin 10 is made of black plastic in the first embodiment, the present invention is not limited to such a case, and the color of the inner wall 52 may be white. Further, the color of the inner wall surface 52 may be a color having high light reflectivity, such as silver. Even in such a case, since the ultraviolet rays 18 are easily reflected in the housing portion 50, the resin 14 can be cured in a wider range, and the positioning accuracy of the second magnetic core 6 in the first curing step S4 Can be improved.
  • Second Embodiment The antenna coil of Embodiment 2 which concerns on this invention is demonstrated using FIG. In the second embodiment, points different from the first embodiment will be mainly described.
  • the position adjustment is performed by rotating the second magnetic core 6, whereas in the second embodiment, the second magnetic core 64 is slid relative to the first magnetic core 62.
  • This embodiment differs from the first embodiment in that the position adjustment is performed.
  • the first magnetic core 4 and the second magnetic core 6 are accommodated in the bobbin 10, and the coil 8 is wound around the bobbin 10.
  • the bobbin is provided. Instead, the coil 66 is directly wound around the first magnetic core 62.
  • the antenna coil 60 of the second embodiment includes a first magnetic core 62, a second magnetic core 64, and a coil 66.
  • the first magnetic core 62 and the second magnetic core 64 are formed in a rod shape by a magnetic material such as ferrite.
  • the first magnetic core 62 is provided with a groove 68 extending in the axial direction D.
  • the second magnetic core 64 is slidably disposed in the groove 68.
  • a coil 66 is wound around the first magnetic core 62.
  • the coil 66 does not interfere with the sliding of the second magnetic core 64 disposed in the groove 68.
  • the sliding position of the second magnetic core 64 is adjusted so that the inductance value of the coil 66 becomes the inductance value corresponding to the predetermined resonance frequency.
  • the second magnetic core 64 is fixed by curing the resin 14 (not shown in FIG. 9) similar to that of the first embodiment described above.
  • the resin 14 may be filled in the gap between the first magnetic core 62 and the second magnetic core 64.
  • the method of manufacturing the antenna coil 60 of the second embodiment described above is the same as the method of manufacturing the antenna coil 2 of the first embodiment. Specifically, in the configuration shown in FIG. 9, a preparation step S11 of preparing the antenna coil 60 before placing the resin 14 is performed. Next, a resin disposing step S12 of disposing the resin 14 around the second magnetic core 64 is performed. Next, position adjustment step S13 which adjusts the relative position of the 2nd magnetic body core 64 to the 1st magnetic body core 62 is performed. Next, a first curing step S14 of curing at least the exposed surface 20 of the resin 14 is performed. Next, a moving step S15 of moving the antenna coil 60 to the heating chamber 26 is performed. Next, a second curing step S16 of curing the uncured portion 24 of the resin 14 is performed.
  • the method of manufacturing the above-described antenna coil 60 is the same as that of the first embodiment, so the illustration is omitted.
  • the present invention has been described above by citing the above first and second embodiments, but the present invention is not limited to the above first and second embodiments.
  • the case where the ultraviolet curing is performed by irradiating the ultraviolet ray 18 to the resin 14 including the ultraviolet curable resin in the first curing step S4 has been described, but the present invention is not limited thereto.
  • the resin 14 may be cured by irradiating a light beam having a wavelength different from that of the ultraviolet light.
  • the resin 14 is not limited to the ultraviolet curable resin as long as it contains a "photo curable resin".
  • the first curing step S4 may be any curing of at least the exposed surface 20 of the resin 14 by a photo-curing method using a light beam of an arbitrary wavelength.
  • a general-purpose resin can be used, and the manufacturing cost of the antenna coil 2 is reduced. can do.
  • the present invention is not limited to such a case.
  • the resin 14 does not have thermosetting property, and the uncured portion 24 of the resin 14 may be cured by leaving the resin 14 at normal temperature. That is, 2nd hardening step S6 should just harden the unhardened part 24 of resin 14 with the arbitrary hardening methods different from the photocuring method of 1st hardening step S4.
  • the second curing is performed as compared to the case where the resin 14 is left to be cured.
  • Step S6 can be completed early. Further, since the exposed surface 20 of the resin 14 is cured in the first curing step S4, even when heat is used in the second curing step S6, the positional deviation of the second magnetic core 6 due to the influence of thermal expansion and the like is suppressed The second magnetic core 6 can be positioned with high accuracy.
  • the moving step S5 is provided between the first curing step S4 and the second curing step S6 .
  • the present invention is not limited to such a case. It is also good. That is, without moving the antenna coil 2 in the first curing step S4 and the second curing step S6, the process may be performed continuously in the same place.
  • the moving step S5 is provided between the first curing step S4 and the second curing step S6, an apparatus configuration suitable for each step can be obtained, and each step can be performed with high accuracy. it can.
  • the present invention is not limited to such a case. It may be. That is, after the resin 14 is disposed in the accommodation portion 12, the second magnetic core 6 may be disposed in the accommodation portion 12. In other words, the resin 14 may be disposed around the second magnetic core 6 at the start of the first curing step S4 at the latest.
  • the present invention is applicable if it is an antenna coil and its manufacturing method.
  • Reference Signs List 2 antenna coil 4 first magnetic core 6 second magnetic core 8 coil 10 bobbin 12 accommodation portion 14 resin 16 ultraviolet ray irradiation portion 18 ultraviolet ray 20 exposed surface 22 cured portion 24 uncured portion 26 heating chamber 28 ultraviolet irradiation chamber 30 heating means 32 conveyance part 40 accommodation part 42 edge part 44 recessed part (light ray path) Reference Signs List 50 accommodation unit 52 inner wall surface 60 antenna coil 62 first magnetic core 64 second magnetic core 66 coil 68 groove

Abstract

The antenna coil manufacturing method according to the present invention includes: a preparation step for preparing an antenna coil that is provided with a first magnetic core, a coil wound around the first magnetic core, and a second magnetic core capable of adjusting the relative position with respect to the first magnetic core; a position adjustment step for adjusting the relative position of the second magnetic core with respect to the first magnetic core so that the inductance value of the coil is close to an inductance value corresponding to a resonant frequency; a first curing step for applying, after the position adjustment step, a light beam to a resin disposed around the second magnetic core, said resin containing a photocurable resin, thereby curing at least the exposed surface of the photocurable resin; and a second curing step for curing, by means of curing methods excluding photocuring, an uncured portion of the photocurable resin-containing resin after the first curing step.

Description

アンテナコイルおよびその製造方法Antenna coil and method of manufacturing the same
　本発明は、アンテナコイルおよびその製造方法に関する。 The present invention relates to an antenna coil and a method of manufacturing the same.
　従来より、所定の周波数の電磁波を利用して近距離において情報または電力を伝達するためのアンテナコイルが知られている（例えば、特許文献１参照）。 Conventionally, an antenna coil for transmitting information or power at a short distance using an electromagnetic wave of a predetermined frequency is known (see, for example, Patent Document 1).
　特許文献１のアンテナコイルは、磁性体コア（第１磁性体コア）と、磁性体コアの周囲に巻回されたコイルとを備える。磁性体コアの近傍には、平面視で縦横の寸法が異なる磁性片（第２磁性体コア）が回転自在な状態で配置されている。磁性片を回転させることにより、磁性片と磁性体コアの相対的な位置関係が変わり、コイルのインダクタンス値が変わる。コイルのインダクタンス値は、アンテナコイルの共振周波数に対応する値に近付くように調整される。 The antenna coil of Patent Document 1 includes a magnetic core (first magnetic core) and a coil wound around the magnetic core. In the vicinity of the magnetic core, magnetic pieces (second magnetic cores) having different vertical and horizontal dimensions in plan view are arranged in a rotatable state. By rotating the magnetic piece, the relative positional relationship between the magnetic piece and the magnetic core changes, and the inductance value of the coil changes. The inductance value of the coil is adjusted to approach a value corresponding to the resonant frequency of the antenna coil.
　このような構成において、磁性片を回転させてコイルのインダクタンス値を調整した後、接着剤などを用いて磁性片の位置が固定される。 In such a configuration, after the magnetic piece is rotated to adjust the inductance value of the coil, the position of the magnetic piece is fixed using an adhesive or the like.
特開２００５－１９１８２０号公報JP, 2005-191820, A
　しかしながら、磁性片の回転位置を調整してから接着剤などで磁性片を固定する場合、接着過程において磁性片の回転位置が変動してしまい、調整されたコイルのインダクタンス値が所望の値からずれる場合がある。このように、コイルのインダクタンス値を精度良く調整することに関して、未だ改善の余地があるといえる。 However, when the magnetic piece is fixed with an adhesive or the like after adjusting the rotational position of the magnetic piece, the rotational position of the magnetic piece fluctuates in the bonding process, and the inductance value of the adjusted coil deviates from the desired value. There is a case. Thus, it can be said that there is still room for improvement in accurately adjusting the inductance value of the coil.
　従って、本発明の目的は、前記問題を解決することにあって、コイルのインダクタンス値を精度良く調整することができるアンテナコイルおよびその製造方法を提供することにある。 Therefore, an object of the present invention is to solve the above-mentioned problems, and to provide an antenna coil capable of precisely adjusting the inductance value of the coil and a method of manufacturing the same.
　前記目的を達成するために、本発明のアンテナコイルの製造方法は、第１磁性体コアと、前記第１磁性体コアの周囲に巻回されたコイルと、前記第１磁性体コアに対する相対的な位置を調整可能な第２磁性体コアと、を備えるアンテナコイルを準備する準備ステップと、前記コイルのインダクタンス値を共振周波数に対応するインダクタンス値に近付けるように、前記第１磁性体コアに対する前記第２磁性体コアの相対的な位置を調整する位置調整ステップと、前記位置調整ステップの後、前記第２磁性体コアの周囲に配置された光硬化性樹脂を含む樹脂に対して光線を照射することにより、前記光硬化性樹脂の少なくとも露出面を硬化させる第１硬化ステップと、前記第１硬化ステップの後、前記光硬化性樹脂を含む前記樹脂の未硬化部分を光硬化以外の硬化法により硬化させる第２硬化ステップと、を含む。 In order to achieve the above object, according to a method of manufacturing an antenna coil of the present invention, a first magnetic core, a coil wound around the first magnetic core, and relative to the first magnetic core are used. Preparing an antenna coil comprising a second magnetic core, the position of which can be adjusted, and setting the inductance value of the coil closer to the inductance value corresponding to the resonance frequency, After the position adjusting step of adjusting the relative position of the second magnetic core and the position adjusting step, the light beam is irradiated to the resin containing the photocurable resin disposed around the second magnetic core. A first curing step of curing at least the exposed surface of the photocurable resin, and an uncured portion of the resin containing the photocurable resin after the first curing step The and a second curing step of curing by the curing methods other than the light-curing.
　また本発明のアンテナコイルは、第１磁性体コアと、前記第１磁性体コアの周囲に巻回されたコイルと、第２磁性体コアと、を備え、前記第２磁性体コアは、その周囲に配置された光硬化性樹脂を含む樹脂が硬化したもので固定されている。 The antenna coil according to the present invention comprises a first magnetic core, a coil wound around the first magnetic core, and a second magnetic core, and the second magnetic core is It fixes with what hardened | cured resin containing photocurable resin arrange | positioned around.
　本発明のアンテナコイルおよびその製造方法によれば、コイルのインダクタンス値を精度良く調整することができる。 According to the antenna coil of the present invention and the method of manufacturing the same, the inductance value of the coil can be adjusted with high accuracy.
実施の形態１のアンテナコイルの平面図Plan view of the antenna coil of the first embodiment 実施の形態１のアンテナコイルの側面図Side view of the antenna coil of Embodiment 1 実施の形態１のアンテナコイルの斜視図The perspective view of the antenna coil of Embodiment 1 実施の形態１の第１磁性体コアと第２磁性体コアを示す斜視図A perspective view showing a first magnetic core and a second magnetic core of Embodiment 1 実施の形態１の第２磁性体コアを示す平面図Top view showing the second magnetic core of the first embodiment 実施の形態１のアンテナコイルの製造方法を説明するための図The figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1. 実施の形態１のアンテナコイルの製造方法を説明するための図The figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1. 実施の形態１のアンテナコイルの製造方法を説明するための図The figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1. 実施の形態１のアンテナコイルの製造方法を説明するための図The figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1. 実施の形態１のアンテナコイルの製造方法を説明するための図The figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1. 実施の形態１のアンテナコイルの製造方法を説明するための図The figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1. 実施の形態１のアンテナコイルの製造方法を説明するための図The figure for demonstrating the manufacturing method of the antenna coil of Embodiment 1. 変形例１によるボビンの収容部を示す平面図The top view which shows the accommodating part of the bobbin by modification 1 変形例２、３、４によるボビンの収容部を示す平面図The top view which shows the accommodating part of the bobbin by modification 2, 3, 4 実施の形態２のアンテナコイルの斜視図The perspective view of the antenna coil of Embodiment 2
　本発明の第１態様によれば、第１磁性体コアと、前記第１磁性体コアの周囲に巻回されたコイルと、前記第１磁性体コアに対する相対的な位置を調整可能な第２磁性体コアと、を備えるアンテナコイルを準備する準備ステップと、前記コイルのインダクタンス値を共振周波数に対応するインダクタンス値に近付けるように、前記第１磁性体コアに対する前記第２磁性体コアの相対的な位置を調整する位置調整ステップと、前記位置調整ステップの後、前記第２磁性体コアの周囲に配置された光硬化性樹脂を含む樹脂に対して光線を照射することにより、前記光硬化性樹脂の少なくとも露出面を硬化させる第１硬化ステップと、前記第１硬化ステップの後、前記光硬化性樹脂を含む前記樹脂の未硬化部分を光硬化以外の硬化法により硬化させる第２硬化ステップと、を含む、アンテナコイルの製造方法を提供する。 According to the first aspect of the present invention, the first magnetic core, the coil wound around the first magnetic core, and the second position adjustable relative to the first magnetic core Preparing an antenna coil comprising a magnetic core, and relating the second magnetic core relative to the first magnetic core such that the inductance value of the coil approaches the inductance value corresponding to the resonant frequency. After the position adjustment step of adjusting the position and the position adjustment step, the light curing is performed by irradiating a light beam to a resin containing a photocurable resin disposed around the second magnetic substance core. After the first curing step of curing at least the exposed surface of the resin and the first curing step, the uncured portion of the resin containing the photocurable resin is cured by a curing method other than photocuring Comprising a second curing step, and to provide a manufacturing method of the antenna coil.
　このような方法によれば、光硬化性樹脂を含む樹脂を光硬化法により硬化させてから、光硬化法以外の方法により未硬化部分を硬化させて第２磁性体コアを固定している。これにより、熱硬化性のみを有する接着剤などを用いて第２磁性体コアを固定する場合に比べて、第２磁性体コアの位置ずれを抑制しながら第２磁性体コアを精度良く位置決めすることができ、コイルのインダクタンス値を精度良く調整することができる。 According to such a method, after the resin including the photocurable resin is cured by the photocuring method, the uncured portion is cured by a method other than the photocuring method to fix the second magnetic core. Thereby, the second magnetic core is positioned with high accuracy while suppressing the positional deviation of the second magnetic core as compared with the case where the second magnetic core is fixed using an adhesive or the like having only a thermosetting property. It is possible to adjust the inductance value of the coil with high accuracy.
　本発明の第２態様によれば、前記光硬化性樹脂は熱硬化性樹脂である、あるいは、前記光硬化性樹脂を含む前記樹脂は熱硬化性樹脂をさらに含み、前記第２硬化ステップは、前記樹脂の未硬化部分を熱硬化法により硬化させる、第１態様に記載のアンテナコイルの製造方法を提供する。このような方法によれば、第２硬化ステップを熱硬化により行うことで、熱などを加えずに放置する場合に比べて樹脂の未硬化部分をより早く硬化させることができる。また第１硬化ステップで樹脂の露出面を硬化させているため、第２硬化ステップで熱を用いた場合でも、熱膨張などの影響による第２磁性体コアの位置ずれは抑制される。これにより、第２磁性体コアを精度良く位置決めしながら、第２硬化ステップを早く行うことができる。 According to a second aspect of the present invention, the photocurable resin is a thermosetting resin, or the resin containing the photocurable resin further includes a thermosetting resin, and the second curing step includes: The manufacturing method of the antenna coil as described in a 1st aspect which hardens | cures the unhardened part of the said resin by the thermosetting method is provided. According to such a method, by performing the second curing step by heat curing, it is possible to cure the uncured portion of the resin faster than in the case of leaving without applying heat or the like. Further, since the exposed surface of the resin is cured in the first curing step, even when heat is used in the second curing step, the positional deviation of the second magnetic core due to the influence of thermal expansion and the like is suppressed. Thereby, the second curing step can be performed quickly while positioning the second magnetic core with high accuracy.
　本発明の第３態様によれば、前記第１硬化ステップと前記第２硬化ステップの間に、前記アンテナコイルを加熱室に移動させる移動ステップをさらに含む、第２態様に記載のアンテナコイルの製造方法を提供する。このような方法によれば、第２硬化ステップを加熱室で行うとともに、第１硬化ステップを加熱室とは異なる場所で行うことで、それぞれの硬化ステップに適した場所で樹脂の硬化を実施することができる。また第１硬化ステップで樹脂の露出面を硬化させているため、第１硬化ステップと第２硬化ステップの間でアンテナコイルを移動させる場合でも、移動による第２磁性体コアの位置ずれを抑制することができる。 According to a third aspect of the present invention, the manufacturing of the antenna coil as described in the second aspect, further comprising a moving step of moving the antenna coil to a heating chamber between the first curing step and the second curing step. Provide a way. According to such a method, the second curing step is performed in the heating chamber, and the first curing step is performed in a place different from the heating chamber, so that the resin is cured in the place suitable for each curing step. be able to. Further, since the exposed surface of the resin is cured in the first curing step, even when the antenna coil is moved between the first curing step and the second curing step, the positional deviation of the second magnetic core due to the movement is suppressed. be able to.
　本発明の第４態様によれば、前記光硬化性樹脂は紫外線硬化性樹脂であり、前記第１硬化ステップで用いる光線は紫外線である、第１態様から第３態様のいずれか１つに記載のアンテナコイルの製造方法を提供する。このような方法によれば、光硬化性樹脂として紫外線硬化性樹脂を用いることで、汎用的な樹脂を用いることができ、アンテナコイルの製造コストを低減することができる。 According to a fourth aspect of the present invention, in any one of the first to third aspects, the photocurable resin is an ultraviolet curable resin, and the light beam used in the first curing step is ultraviolet light. The present invention provides a method of manufacturing an antenna coil. According to such a method, a general-purpose resin can be used by using an ultraviolet curable resin as the photocurable resin, and the manufacturing cost of the antenna coil can be reduced.
　本発明の第５態様によれば、前記第１磁性体コアおよび前記第２磁性体コアを収容するボビンをさらに備え、前記ボビンの胴部に前記コイルが巻回されており、前記ボビンには、前記第２磁性体コアを収容する凹状の収容部が設けられている、第１態様から第４態様のいずれか１つに記載のアンテナコイルの製造方法を提供する。このような方法によれば、第１磁性体コアおよび前記第２磁性体コアという２つのコアを収容するボビンを設けることで、アンテナコイルを取扱う際の作業性を向上させることができる。 According to a fifth aspect of the present invention, a bobbin accommodating the first magnetic body core and the second magnetic body core is further provided, the coil is wound around the body of the bobbin, and the bobbin is mounted on the bobbin The manufacturing method of the antenna coil as described in any one of the 1st aspect to the 4th aspect provided with the concave-shaped accommodating part which accommodates a said 2nd magnetic body core. According to such a method, by providing the bobbins accommodating the two cores of the first magnetic body core and the second magnetic body core, the workability at the time of handling the antenna coil can be improved.
　本発明の第６態様によれば、前記ボビンとして、前記収容部の端縁部に光線経路を設けた前記ボビンを用いる、第５態様に記載のアンテナコイルの製造方法を提供する。このような方法によれば、収容部の端縁部に光線経路を設けることで、収容部内の樹脂に対して光線を照射しやすくなり、第１硬化ステップでより広範囲に樹脂を硬化させることができる。これにより、第１硬化ステップによる第２磁性体コアの位置決め精度を向上させることができる。 According to a sixth aspect of the present invention, there is provided the method of manufacturing an antenna coil as described in the fifth aspect, wherein the bobbin provided with a light beam path at an end edge portion of the accommodating portion is used as the bobbin. According to such a method, by providing a light beam path at the end edge portion of the housing portion, it becomes easy to irradiate the light beam to the resin in the housing portion, and the resin can be cured in a wider range in the first curing step. it can. Thereby, the positioning accuracy of the second magnetic core by the first curing step can be improved.
　本発明の第７態様によれば、前記収容部の内壁面に、前記内壁面を構成する材料よりも光反射性の高い材料を付着させた、第５態様又は第６態様に記載のアンテナコイルの製造方法を提供する。このような方法によれば、収容部内で光線が反射しやすくなるため、光硬化性樹脂をより広範囲で硬化させることができ、第１硬化ステップによる第２磁性体コアの位置決め精度を向上させることができる。 According to the seventh aspect of the present invention, the antenna coil as described in the fifth aspect or the sixth aspect, wherein a material having a higher light reflectivity than the material constituting the inner wall surface is attached to the inner wall surface of the housing portion. Provide a manufacturing method of According to such a method, since the light beam is easily reflected in the housing portion, the photocurable resin can be cured in a wider range, and the positioning accuracy of the second magnetic core in the first curing step can be improved. Can.
　本発明の第８態様によれば、前記収容部の内壁面の表面粗さＲａを１００以下に設定した、第５態様から第７態様のいずれか１つに記載のアンテナコイルの製造方法を提供する。このような方法によれば、収容部内で光線が反射しやすくなるため、光硬化性樹脂をより広範囲で硬化させることができ、第１硬化ステップによる第２磁性体コアの位置決め精度を向上させることができる。 According to an eighth aspect of the present invention, there is provided the method of manufacturing an antenna coil according to any one of the fifth to seventh aspects, wherein the surface roughness Ra of the inner wall surface of the housing portion is set to 100 or less. Do. According to such a method, since the light beam is easily reflected in the housing portion, the photocurable resin can be cured in a wider range, and the positioning accuracy of the second magnetic core in the first curing step can be improved. Can.
　本発明の第９態様によれば、前記収容部の内壁面の色を白色にした、第５態様から第８態様のいずれか１つに記載のアンテナコイルの製造方法を提供する。このような方法によれば、収容部内で光線が反射しやすくなるため、光硬化性樹脂をより広範囲で硬化させることができ、第１硬化ステップによる第２磁性体コアの位置決め精度を向上させることができる。 According to a ninth aspect of the present invention, there is provided the method of manufacturing an antenna coil according to any one of the fifth to eighth aspects, wherein the color of the inner wall surface of the housing portion is white. According to such a method, since the light beam is easily reflected in the housing portion, the photocurable resin can be cured in a wider range, and the positioning accuracy of the second magnetic core in the first curing step can be improved. Can.
　本発明の第１０態様によれば、第１磁性体コアと、前記第１磁性体コアの周囲に巻回されたコイルと、第２磁性体コアと、を備え、前記第２磁性体コアは、その周囲に配置された光硬化性樹脂を含む樹脂が硬化したもので固定されている、アンテナコイルを提供する。 According to a tenth aspect of the present invention, there is provided a first magnetic core, a coil wound around the first magnetic core, and a second magnetic core, the second magnetic core comprising An antenna coil is provided, wherein a resin including a photocurable resin disposed around the periphery thereof is fixed with a cured resin.
　このような構成によれば、第２磁性体コアを光硬化法により樹脂で固定してアンテナコイルを製造することができる。これにより、熱硬化性のみを有する接着剤などを用いて第２磁性体コアを固定する場合と比較して、第２磁性体コアの位置ずれが生じにくく、コイルのインダクタンス値を精度良く調整可能な製造方法によりアンテナコイルを製造することができる。 According to such a configuration, it is possible to manufacture the antenna coil by fixing the second magnetic core with the resin by the photo-curing method. As a result, compared to the case where the second magnetic core is fixed using an adhesive or the like having only a thermosetting property, positional deviation of the second magnetic core is less likely to occur, and the inductance value of the coil can be accurately adjusted. The antenna coil can be manufactured by any of the manufacturing methods.
　本発明の第１１態様によれば、前記光硬化性樹脂は熱硬化性樹脂である、あるいは、前記光硬化性樹脂を含む前記樹脂は熱硬化性樹脂をさらに含む、第１０態様に記載のアンテナコイルを提供する。このような構成によれば、光硬化法を行った後に熱硬化法で樹脂を硬化させて第２磁性体コアを固定する方法でアンテナコイルを製造することができる。このような方法によれば、光硬化を行った後に熱などを加えずに放置する場合に比べて、樹脂の未硬化部分をより早く硬化させることができる。 According to an eleventh aspect of the present invention, the antenna according to the tenth aspect, wherein the photocurable resin is a thermosetting resin, or the resin containing the photocurable resin further includes a thermosetting resin. Provide a coil. According to such a configuration, the antenna coil can be manufactured by the method of curing the resin by the thermosetting method and fixing the second magnetic core after performing the photocuring method. According to such a method, it is possible to cure the uncured portion of the resin faster than in the case where it is left without applying heat after photocuring.
　本発明の第１２態様によれば、前記光硬化性樹脂は紫外線硬化性樹脂である、第１０態様又は第１１態様に記載のアンテナコイルを提供する。このような構成によれば、光硬化性樹脂として紫外線硬化性樹脂を用いることで、汎用的な樹脂を用いることができ、アンテナコイルの製造コストを低減することができる。 According to a twelfth aspect of the present invention, there is provided the antenna coil according to the tenth aspect or the eleventh aspect, wherein the photocurable resin is an ultraviolet curable resin. According to such a configuration, by using an ultraviolet curable resin as the photocurable resin, a general-purpose resin can be used, and the manufacturing cost of the antenna coil can be reduced.
　本発明の第１３態様によれば、前記第１磁性体コアおよび前記第２磁性体コアを収容するボビンをさらに備え、前記ボビンの胴部には前記コイルが巻回されており、前記ボビンには、前記第２磁性体コアを収容する凹状の収容部が設けられている、第１０態様から第１２態様のいずれか１つに記載のアンテナコイルを提供する。このような構成によれば、第１磁性体コアおよび前記第２磁性体コアという２つのコアを収容するボビンを設けることで、アンテナコイルを取扱う際の作業性を向上させることができる。 According to a thirteenth aspect of the present invention, there is further provided a bobbin for housing the first magnetic body core and the second magnetic body core, the coil is wound around the body portion of the bobbin, and the bobbin is The present invention provides the antenna coil according to any one of the tenth to twelfth aspects, wherein a concave housing portion for housing the second magnetic body core is provided. According to such a configuration, by providing the bobbins accommodating the two cores of the first magnetic body core and the second magnetic body core, the workability at the time of handling the antenna coil can be improved.
　本発明の第１４態様によれば、前記ボビンには、前記収容部の端縁部に光線経路を設けている、第１３態様に記載のアンテナコイルを提供する。このような構成によれば、収容部の端縁部に光線経路を設けることで、収容部内の樹脂に対して光線を照射しやすくなり、第２磁性体コアの位置決めを精度良く行える製造方法によりアンテナコイルを製造することができる。 According to a fourteenth aspect of the present invention, there is provided the antenna coil according to the thirteenth aspect, wherein the bobbin is provided with a light beam path at an end edge portion of the housing portion. According to such a configuration, by providing the light beam path at the end edge portion of the housing portion, it becomes easy to irradiate the light beam to the resin in the housing portion, and the manufacturing method can accurately position the second magnetic core. An antenna coil can be manufactured.
　本発明の第１５態様によれば、前記収容部の内壁面に、前記内壁面を構成する材料よりも光反射性の高い材料を付着させた、第１３態様又は第１４態様に記載のアンテナコイルを提供する。このような構成によれば、収容部内で光線が反射しやすくなるため、光硬化性樹脂をより広範囲で硬化させることができ、第２磁性体コアの位置決め精度を向上させることができる製造方法によりアンテナコイルを製造することができる。 According to a fifteenth aspect of the present invention, the antenna coil as set forth in the thirteenth aspect or the fourteenth aspect, wherein a material having a higher light reflectivity than the material constituting the inner wall surface is attached to the inner wall surface of the housing portion. I will provide a. According to such a configuration, since the light beam is easily reflected in the housing portion, the photocurable resin can be cured in a wider range, and the positioning accuracy of the second magnetic core can be improved. An antenna coil can be manufactured.
　本発明の第１６態様によれば、前記収容部の内壁面の表面粗さＲａを１００以下に設定した、第１３態様から第１５態様のいずれか１つに記載のアンテナコイルを提供する。このような構成によれば、収容部内で光線が反射しやすくなるため、光硬化性樹脂をより広範囲で硬化させることができ、第２磁性体コアの位置決め精度を向上させることができる製造方法によりアンテナコイルを製造することができる。 According to a sixteenth aspect of the present invention, there is provided the antenna coil according to any one of the thirteenth to fifteenth aspects, wherein the surface roughness Ra of the inner wall surface of the housing portion is set to 100 or less. According to such a configuration, since the light beam is easily reflected in the housing portion, the photocurable resin can be cured in a wider range, and the positioning accuracy of the second magnetic core can be improved. An antenna coil can be manufactured.
　本発明の第１７態様によれば、前記収容部の内壁面の色を白色にした、第１３態様から第１６態様のいずれか１つに記載のアンテナコイルを提供する。このような構成によれば、収容部内で光線が反射しやすくなるため、光硬化性樹脂をより広範囲で硬化させることができ、第２磁性体コアの位置決め精度を向上させることができる製造方法によりアンテナコイルを製造することができる。 According to a seventeenth aspect of the present invention, there is provided the antenna coil according to any one of the thirteenth to sixteenth aspects, wherein the color of the inner wall surface of the housing portion is white. According to such a configuration, since the light beam is easily reflected in the housing portion, the photocurable resin can be cured in a wider range, and the positioning accuracy of the second magnetic core can be improved. An antenna coil can be manufactured.
　以下、本発明に係るアンテナコイルおよびその製造方法の例示的な実施形態について、添付の図面を参照しながら説明する。本発明は、以下の実施形態の具体的な構成に限定されるものではなく、同様の技術的思想に基づく構成が本発明に含まれる。 Hereinafter, an exemplary embodiment of an antenna coil and a method of manufacturing the same according to the present invention will be described with reference to the attached drawings. The present invention is not limited to the specific configurations of the following embodiments, and configurations based on similar technical ideas are included in the present invention.
（実施の形態１） Embodiment 1
　実施の形態１におけるアンテナコイルの概略構成について、図１－図３を用いて説明する。図１は、実施の形態１のアンテナコイル２の平面図であり、図２は、アンテナコイル２の側面図であり、図３は、アンテナコイル２の斜視図である。 The schematic configuration of the antenna coil in the first embodiment will be described with reference to FIGS. FIG. 1 is a plan view of the antenna coil 2 of the first embodiment, FIG. 2 is a side view of the antenna coil 2, and FIG. 3 is a perspective view of the antenna coil 2.
　実施の形態１におけるアンテナコイル２は、所定の周波数（例えば、約１２５．０ｋＨｚ）の電磁波を利用して近距離で情報を伝達するためのシステムに用いられる通信部品である。アンテナコイル２は例えば、自動車のキーレスエントリー用の通信部品として自動車に搭載されて使用される。 The antenna coil 2 in the first embodiment is a communication component used in a system for transmitting information at a short distance using electromagnetic waves of a predetermined frequency (for example, about 125.0 kHz). The antenna coil 2 is mounted and used in a car as a communication component for keyless entry of the car, for example.
　図１－図３に示すアンテナコイル２は、第１磁性体コア４と、第２磁性体コア６と、コイル８と、ボビン１０とを備える。 The antenna coil 2 shown in FIGS. 1 to 3 includes a first magnetic core 4, a second magnetic core 6, a coil 8 and a bobbin 10.
　第１磁性体コア４および第２磁性体コア６は、フェライトなどの磁性体により構成された部材である（フェライトコア）。第１磁性体コア４および第２磁性体コア６は、ボビン１０に収容されている。 The first magnetic core 4 and the second magnetic core 6 are members made of a magnetic material such as ferrite (ferrite core). The first magnetic core 4 and the second magnetic core 6 are housed in the bobbin 10.
　ボビン１０に収容された状態において、第１磁性体コア４はボビン１０によって位置決めされて固定されている。図１に示すように、第２磁性体コア６の周囲には位置決め用の樹脂１４（図６Ｆ）が硬化した状態で配置されている。硬化した樹脂１４によって第２磁性体コア６が位置決めされている。 In the state accommodated in the bobbin 10, the first magnetic core 4 is positioned and fixed by the bobbin 10. As shown in FIG. 1, the positioning resin 14 (FIG. 6F) is disposed around the second magnetic core 6 in a cured state. The second magnetic core 6 is positioned by the cured resin 14.
　第１磁性体コア４および第２磁性体コア６のみを図示した状態を図４に示す。図４に示すように、本実施の形態１における第１磁性体コア４は棒状に構成される。第２磁性体コア６は、第１磁性体コア４と比較して寸法が大幅に小さい大略柱状に構成されている。 A state in which only the first magnetic core 4 and the second magnetic core 6 are illustrated is shown in FIG. As shown in FIG. 4, the first magnetic core 4 in the first embodiment is configured in a bar shape. The second magnetic core 6 is formed in a substantially columnar shape whose size is significantly smaller than that of the first magnetic core 4.
　第２磁性体コア６の平面図を図５に示す。図５に示すように、本実施の形態１における第２磁性体コア６は、平面視における縦方向の寸法Ａと横方向の寸法Ｂが異なるものが用いられる。第２磁性体コア６は、図４、図５に示すＲ方向に回転することで、第１磁性体コア４に対する相対的な位置が変更される。 A plan view of the second magnetic core 6 is shown in FIG. As shown in FIG. 5, as the second magnetic core 6 in the first embodiment, one having a dimension A in the longitudinal direction different from a dimension B in the lateral direction in plan view is used. By rotating the second magnetic core 6 in the R direction shown in FIGS. 4 and 5, the relative position to the first magnetic core 4 is changed.
　図１－図３に示すコイル８は、第１磁性体コア４の周囲に巻回された導体コイル（巻線）である。図１、図３に示すように、実施の形態１のコイル８はボビン１０の胴部に巻回されており、第１磁性体コア４には直接接触していない。 The coil 8 shown in FIGS. 1 to 3 is a conductor coil (winding) wound around the first magnetic core 4. As shown in FIGS. 1 and 3, the coil 8 of the first embodiment is wound around the body of the bobbin 10 and is not in direct contact with the first magnetic core 4.
　第１磁性体コア４はコイル８の内側に配置されている。一方で、第２磁性体コア６は第１磁性体コア４およびコイル８の近傍に配置されている。 The first magnetic core 4 is disposed inside the coil 8. On the other hand, the second magnetic core 6 is disposed in the vicinity of the first magnetic core 4 and the coil 8.
　コイル８は、コイル８の内側および近傍に配置された第１磁性体コア４と第２磁性体コア６の位置に応じたインダクタンス値を有する。コイル８のインダクタンス値は、アンテナコイル２における所定の共振周波数（例えば１２５．０ｋＨｚ）に対応する値に近付くように調整されている。具体的には、図５などに示した第２磁性体コア６の回転位置を調整し、第１磁性体コア４に対する第２磁性体コア６の相対的な位置を変更することで、コイル８のインダクタンス値が調整されている。第２磁性体コア６は、コイル８のインダクタンス値が調整可能となる範囲で第１磁性体コア４およびコイル８の近傍に配置されている。具体的な調整方法については後述する。 The coil 8 has an inductance value corresponding to the positions of the first magnetic core 4 and the second magnetic core 6 disposed inside and near the coil 8. The inductance value of the coil 8 is adjusted to approach a value corresponding to a predetermined resonance frequency (for example, 125.0 kHz) in the antenna coil 2. Specifically, the coil 8 is adjusted by adjusting the rotational position of the second magnetic core 6 shown in FIG. 5 and the like, and changing the relative position of the second magnetic core 6 with respect to the first magnetic core 4. The inductance value of is adjusted. The second magnetic core 6 is disposed in the vicinity of the first magnetic core 4 and the coil 8 within a range in which the inductance value of the coil 8 can be adjusted. The specific adjustment method will be described later.
　ボビン１０は、第１磁性体コア４および第２磁性体コア６を収容するケース部材である。ボビン１０は、第１磁性体コア４および第２磁性体コア６を収容可能な空間を形成する大略筒状の部材である。ボビン１０は、プラスチックなどの絶縁性材料で形成されている（実施の形態１では黒色のプラスチック）。 The bobbin 10 is a case member that accommodates the first magnetic core 4 and the second magnetic core 6. The bobbin 10 is a substantially cylindrical member that forms a space that can accommodate the first magnetic core 4 and the second magnetic core 6. The bobbin 10 is formed of an insulating material such as plastic (black plastic in the first embodiment).
　ボビン１０には、第２磁性体コア６を収容するための収容部１２が設けられている。本実施の形態１における収容部１２は、ボビン１０の上面を下方に凹ませた凹部である。収容部１２には、第２磁性体コア６と、第２磁性体コア６の周囲で硬化した樹脂１４（図１）が配置されており、収容部１２内で第２磁性体コア６が位置決め・保持されている。 The bobbin 10 is provided with a housing portion 12 for housing the second magnetic core 6. The housing portion 12 in the first embodiment is a recess in which the upper surface of the bobbin 10 is recessed downward. The second magnetic core 6 and the resin 14 (FIG. 1) hardened around the second magnetic core 6 are disposed in the housing 12, and the second magnetic core 6 is positioned in the housing 12.・ It is held.
　上述した構成のアンテナコイル２を製造する過程において、第２磁性体コア６の回転位置を調整することで、コイル８のインダクタンス値を所定の共振周波数に対応するインダクタンス値に近付ける操作が行われる。位置が調整された第２磁性体コア６は、その位置が変化しないように、周囲に配置された樹脂１４を硬化させたもので位置決めおよび固定される。このようなプロセスを含むアンテナコイル２の製造方法について、図６Ａ－図６Ｇを用いて説明する。 In the process of manufacturing the antenna coil 2 having the above-described configuration, by adjusting the rotational position of the second magnetic core 6, an operation of bringing the inductance value of the coil 8 closer to the inductance value corresponding to the predetermined resonance frequency is performed. The second magnetic core 6 whose position has been adjusted is positioned and fixed by curing the resin 14 disposed around the periphery so that the position does not change. A method of manufacturing the antenna coil 2 including such a process will be described with reference to FIGS. 6A to 6G.
　図６Ａに示すように、まず、アンテナコイル２を準備する（ステップＳ１：準備ステップ）。具体的には、図１－図３に示した構成で樹脂１４を配置する前のアンテナコイル２を準備する。図６Ａに示すアンテナコイル２は、第１磁性体コア４と、第２磁性体コア６と、コイル８と、ボビン１０とを備える。第２磁性体コア６は収容部１２に収容されており、収容部１２には樹脂１４は充填されていない。 As shown in FIG. 6A, first, the antenna coil 2 is prepared (step S1: preparation step). Specifically, the antenna coil 2 before arranging the resin 14 in the configuration shown in FIGS. 1 to 3 is prepared. The antenna coil 2 shown in FIG. 6A includes a first magnetic core 4, a second magnetic core 6, a coil 8, and a bobbin 10. The second magnetic core 6 is accommodated in the accommodating portion 12, and the accommodating portion 12 is not filled with the resin 14.
　次に、樹脂１４を配置する（ステップＳ２：樹脂配置ステップ）。具体的には、図６Ｂに示すように、第２磁性体コア６を収容している収容部１２の中に樹脂１４を充填する。樹脂１４を充填することで、第２磁性体コア６の周囲に樹脂１４が配置される。樹脂１４としては、硬化する前の液状の樹脂が用いられる。図６Ｂでは、便宜的に第２磁性体コア６を上方に移動させた状態を示している。 Next, the resin 14 is placed (step S2: resin placement step). Specifically, as shown in FIG. 6B, the resin 14 is filled in the housing portion 12 housing the second magnetic core 6. By filling the resin 14, the resin 14 is disposed around the second magnetic core 6. As resin 14, liquid resin before hardening is used. FIG. 6B shows a state in which the second magnetic core 6 is moved upward for the sake of convenience.
　樹脂１４の配置後において、第２磁性体コア６は、硬化前の液状の樹脂１４に接触しながら移動可能な状態にある。 After the resin 14 is disposed, the second magnetic core 6 is movable while being in contact with the liquid resin 14 before curing.
　本実施の形態１では、樹脂１４として「紫外線硬化性」と「熱硬化性」の両方の特性を持つ樹脂を用いている。このような樹脂１４を用いることにより、樹脂１４を硬化させる際には、後述する紫外線硬化による第１硬化ステップＳ４と、熱硬化による第２硬化ステップＳ６という２段階の硬化ステップを経て硬化させることが可能となる。 In the first embodiment, as the resin 14, a resin having both “ultraviolet curable” and “thermo curable” characteristics is used. When curing the resin 14 by using such a resin 14, curing is performed through a two-step curing step of a first curing step S 4 by ultraviolet curing described later and a second curing step S 6 by thermal curing. Is possible.
　このような樹脂１４は例えば、紫外線硬化性樹脂と熱硬化性樹脂を混合した複数種類の樹脂で構成されてもよい。あるいは、紫外線硬化性と熱硬化性の両方の機能を兼ね備えた１種類の樹脂であってもよい。 Such resin 14 may be made of, for example, a plurality of types of resins in which an ultraviolet curable resin and a thermosetting resin are mixed. Alternatively, it may be one kind of resin having both of the functions of ultraviolet curing and thermosetting.
　次に、第２磁性体コア６の位置調整を行う（ステップＳ３：位置調整ステップ）。具体的には、図６Ｃに示すように、収容部１２において第２磁性体コア６の周囲に樹脂１４が配置された状態において、第１の回転位置にある第２磁性体コア６をＲ方向に回転させる。これにより、図６Ｄに示すように、第２磁性体コア６は、第１の回転位置とは異なる第２の回転位置に配置される。 Next, position adjustment of the 2nd magnetic material core 6 is performed (Step S3: position adjustment step). Specifically, as shown in FIG. 6C, in a state where the resin 14 is disposed around the second magnetic substance core 6 in the housing portion 12, the second magnetic substance core 6 in the first rotational position is in the R direction Rotate to. Thereby, as shown to FIG. 6D, the 2nd magnetic material core 6 is arrange | positioned in the 2nd rotation position different from a 1st rotation position.
　第２磁性体コア６の回転位置を変更することにより、第１磁性体コア４に対する第２磁性体コア６の相対的な位置が変わる。これにより、第１磁性体コア４の周囲で、第２磁性体コア６の近傍に巻回されたコイル８のインダクタンス値が変わる。コイル８のインダクタンス値が所定の共振周波数に対応するインダクタンス値となるように、第２磁性体コア６の回転位置が調整される。 By changing the rotational position of the second magnetic core 6, the relative position of the second magnetic core 6 to the first magnetic core 4 changes. Thus, the inductance value of the coil 8 wound around the second magnetic core 6 changes around the first magnetic core 4. The rotational position of the second magnetic core 6 is adjusted such that the inductance value of the coil 8 becomes an inductance value corresponding to a predetermined resonance frequency.
　次に、樹脂１４の仮硬化を行う（ステップＳ４：第１硬化ステップ）。具体的には、紫外線を用いた紫外線硬化法によって樹脂１４を硬化させる。より具体的には、図６Ｅに示すように、収容部１２の上方に配置された紫外線照射部１６から、収容部１２に向けて紫外線１８を照射する。 Next, temporary curing of the resin 14 is performed (step S4: first curing step). Specifically, the resin 14 is cured by an ultraviolet curing method using ultraviolet light. More specifically, as shown in FIG. 6E, the ultraviolet ray irradiation unit 16 disposed above the accommodation unit 12 irradiates the accommodation unit 12 with the ultraviolet light 18.
　紫外線１８を照射することにより、収容部１２内の樹脂１４が部分的に硬化される。具体的には、図６Ｆの縦断面図に示すように、樹脂１４のうち、露出面２０を含む上側部分が硬化されて硬化部分２２となる。樹脂１４の下側部分は、紫外線１８が硬化部分２２によって遮られることにより硬化せず、未硬化部分２４となる。 By irradiating the ultraviolet rays 18, the resin 14 in the housing portion 12 is partially cured. Specifically, as shown in the vertical cross-sectional view of FIG. 6F, the upper portion of the resin 14 including the exposed surface 20 is cured to be a cured portion 22. The lower portion of the resin 14 is not cured by blocking the ultraviolet light 18 by the cured portion 22, and becomes an uncured portion 24.
　このように第１硬化ステップＳ４により樹脂１４を部分的に硬化させることで、第２磁性体コア６を位置決めすることができる。なお、第１硬化ステップＳ４では、第２磁性体コア６の位置ずれを抑制するのに必要な程度に樹脂１４を硬化させている。 By partially curing the resin 14 in the first curing step S4 as described above, the second magnetic core 6 can be positioned. In the first curing step S4, the resin 14 is cured to an extent necessary to suppress the displacement of the second magnetic core 6.
　第１硬化ステップＳ４における紫外線１８の照射時間は、樹脂１４の種類、紫外線１８の強度などに応じて、適宜設定すればよい。 The irradiation time of the ultraviolet light 18 in the first curing step S4 may be appropriately set according to the type of the resin 14, the intensity of the ultraviolet light 18, and the like.
　また第１硬化ステップＳ４は紫外線１８を用いた紫外線硬化法であるため、常温下で実施される。このようにアンテナコイル２を加熱するものではないため、収容部１２を構成するボビン１０などが熱膨張によって変形することで、第２磁性体コア６の回転位置がずれてしまうことを防止することができる。これにより、第２磁性体コア６の位置決めを精度良く行うことができる。 In addition, since the first curing step S4 is an ultraviolet curing method using ultraviolet rays 18, it is carried out at normal temperature. As described above, since the antenna coil 2 is not heated, it is possible to prevent the rotational position of the second magnetic core 6 from being shifted by deformation of the bobbin 10 and the like constituting the housing portion 12 due to thermal expansion. Can. Thereby, positioning of the 2nd magnetic body core 6 can be performed with sufficient accuracy.
　さらに樹脂１４は、光硬化性樹脂の中でも特に紫外線硬化性樹脂を用いているため、汎用的な樹脂を用いることができ、アンテナコイル２の製造コストを低減することができる。 Further, as the resin 14, a UV curable resin is used particularly among the photocurable resins, so that a general purpose resin can be used, and the manufacturing cost of the antenna coil 2 can be reduced.
　上述した第１硬化ステップＳ４は、位置調整ステップＳ３からアンテナコイル２を動かさずにアンテナコイル２の位置および向きを維持した状態で行われる。すなわち、第２磁性体コア６の第２回転位置が維持された状態で第１硬化ステップＳ４が行われる。このようにして、位置調整ステップＳ３から第１硬化ステップＳ４の移行時に第２磁性体コア６の位置ずれを抑制することができる。 The first curing step S4 described above is performed while maintaining the position and the orientation of the antenna coil 2 without moving the antenna coil 2 from the position adjustment step S3. That is, the first curing step S4 is performed in a state in which the second rotational position of the second magnetic core 6 is maintained. In this manner, the positional deviation of the second magnetic core 6 can be suppressed at the transition from the position adjustment step S3 to the first curing step S4.
　また、位置調整ステップＳ３を終えてから第１硬化ステップＳ４を実行するまでの時間間隔は短時間に設定される。このような時間設定により、位置調整ステップＳ３から第１硬化ステップの移行時における第２磁性体コア６の位置ずれをより確実に防止することができる。 In addition, the time interval from the completion of the position adjustment step S3 to the execution of the first curing step S4 is set to a short time. By such a time setting, it is possible to more reliably prevent the positional deviation of the second magnetic core 6 at the time of transition from the position adjustment step S3 to the first curing step.
　次に、アンテナコイル２を移動させる（ステップＳ５：移動ステップ）。具体的には、図６Ｇに示すように、紫外線照射部１６が設けられていた紫外線照射室２８から、紫外線照射室２８とは異なる場所にある加熱室２６へアンテナコイル２を移動させる（矢印Ｃ）。アンテナコイル２の移動には、アンテナコイル２を搬送する搬送部３２（例えばロボットアーム）が用いられる。加熱室２６には、アンテナコイル２の樹脂１４を加熱可能な加熱手段３０（例えばヒータ）が設けられている。 Next, the antenna coil 2 is moved (step S5: moving step). Specifically, as shown in FIG. 6G, the antenna coil 2 is moved from the ultraviolet irradiation chamber 28 in which the ultraviolet irradiation unit 16 was provided to the heating chamber 26 located at a different place from the ultraviolet irradiation chamber 28 (arrow C ). For the movement of the antenna coil 2, a transport unit 32 (for example, a robot arm) for transporting the antenna coil 2 is used. The heating chamber 30 is provided with a heating unit 30 (for example, a heater) capable of heating the resin 14 of the antenna coil 2.
　図示を省略しているが、紫外線照射室２８では、アンテナコイル２を水平配置（横置き）していたのに対し、加熱室２６では、樹脂１４の加熱を促進するためにアンテナコイル２を鉛直配置（縦置き）する。このように、実施の形態１の移動ステップＳ５によれば、アンテナコイル２の位置だけでなく向きも変更される。 Although illustration is omitted, the antenna coil 2 is arranged horizontally (horizontally placed) in the ultraviolet irradiation chamber 28, whereas the antenna coil 2 is vertically arranged in the heating chamber 26 to promote the heating of the resin 14. Arrange (vertically). As described above, according to the movement step S5 of the first embodiment, not only the position of the antenna coil 2 but also the direction thereof is changed.
　このようなアンテナコイル２の位置および向きの変更に対して、前述した第１硬化ステップＳ４によって樹脂１４は部分的に硬化されており、第２磁性体コア６は位置決めされている。よって、アンテナコイル２の位置および向きの変更に伴う第２磁性体コア６の位置ずれを抑制することができる。これにより、コイル８のインダクタンス値を精度良く調整することが可能となる。 The resin 14 is partially cured by the above-described first curing step S4 with respect to the change of the position and the orientation of the antenna coil 2 as described above, and the second magnetic core 6 is positioned. Therefore, position shift of the 2nd magnetic substance core 6 accompanying change of a position and direction of antenna coil 2 can be controlled. Thus, the inductance value of the coil 8 can be adjusted with high accuracy.
　次に、樹脂１４の本硬化を行う（ステップＳ６：第２硬化ステップ）。具体的には、第１硬化ステップＳ４の紫外線硬化法とは異なる硬化法により、樹脂１４を硬化させる。 Next, main curing of the resin 14 is performed (step S6: second curing step). Specifically, the resin 14 is cured by a curing method different from the ultraviolet curing method of the first curing step S4.
　実施の形態１では特に、加熱手段３０を用いた熱硬化法により、樹脂１４を硬化させる。具体的には、図６Ｇに示す加熱室２６において、加熱手段３０を用いてアンテナコイル２の樹脂１４を加熱する（例えば１００℃で１時間）。これにより、図６Ｆに示した樹脂１４の未硬化部分２４を硬化させる。 In the first embodiment, in particular, the resin 14 is cured by a thermal curing method using the heating means 30. Specifically, in the heating chamber 26 shown in FIG. 6G, the resin 14 of the antenna coil 2 is heated using the heating means 30 (for example, at 100 ° C. for one hour). Thereby, the uncured portion 24 of the resin 14 shown in FIG. 6F is cured.
　第２硬化ステップＳ６は、第１硬化ステップＳ４では利用しなかった熱を利用しているため、第１硬化ステップＳ４で紫外線１８が到達しなかった樹脂１４の下方側の未硬化部分２４まで硬化させることができる。 Since the second curing step S6 uses the heat not utilized in the first curing step S4, curing is performed up to the uncured portion 24 on the lower side of the resin 14 which the ultraviolet rays 18 did not reach in the first curing step S4. It can be done.
　第２硬化ステップＳ６の実施により、樹脂１４の全体が硬化される。これにより、第２磁性体コア６の回転位置が強固に位置決めされて固定される。第２磁性体コア６を強固に位置決めすることで、第２磁性体コア６に対する信頼性の高い保持強度を実現することができる。 By performing the second curing step S6, the entire resin 14 is cured. Thus, the rotational position of the second magnetic core 6 is firmly positioned and fixed. By firmly positioning the second magnetic core 6, a highly reliable holding strength for the second magnetic core 6 can be realized.
　第２硬化ステップＳ６は、紫外線硬化法とは異なる硬化法の中でも特に「熱硬化法」とすることで、熱を加えずに放置して未硬化部分２４を硬化させる場合に比べて、未硬化部分２４をより早く硬化させることができる。また第１硬化ステップＳ４で樹脂１４の露出面２０を硬化させているため、第２硬化ステップＳ６で熱を用いた場合でも、熱膨張などの影響による第２磁性体コア６の位置ずれは抑制される。このように、第２磁性体コア６を精度良く位置決めしながら第２硬化ステップを早く完了することができる。 In the second curing step S6, among the curing methods different from the ultraviolet curing method, the “hard curing method” is not cured as compared with the case where the uncured portion 24 is cured by being left without applying heat. Portions 24 can be cured faster. Further, since the exposed surface 20 of the resin 14 is cured in the first curing step S4, even when heat is used in the second curing step S6, the positional deviation of the second magnetic core 6 due to the influence of thermal expansion and the like is suppressed Be done. Thus, the second curing step can be completed quickly while positioning the second magnetic core 6 with high accuracy.
　また図６Ｇに示すように紫外線照射室２８と加熱室２６を別に設けることで、第１硬化ステップと第２硬化ステップのそれぞれのステップに適した装置構成とすることができ、それぞれのステップを精度良く実施することができる。 Further, as shown in FIG. 6G, by separately providing the ultraviolet irradiation chamber 28 and the heating chamber 26, the apparatus configuration suitable for each step of the first curing step and the second curing step can be obtained, and each step is accurate. It can be done well.
　上述したように、本実施の形態１によるアンテナコイル２の製造方法は、紫外線硬化性と熱硬化性の両方の特性を持つ樹脂１４を用いて、紫外線硬化法により硬化させた後に熱硬化法でさらに硬化させることで第２磁性体コア６を固定している。このような方法によれば、熱硬化性のみの特性を有するシリコン系の接着剤などを用いて第２磁性体コア６を固定する場合に比べて、第２磁性体コア６の位置調整後における位置ずれを抑制することができ、コイル８のインダクタンス値を精度良く調整できる。これにより、共振周波数からの公差が少ない所望の周波数を有したアンテナコイル２を製造することができる。 As described above, in the method of manufacturing the antenna coil 2 according to the first embodiment, the resin 14 having the characteristics of both UV curing and thermosetting is cured by the UV curing method and then cured by the UV curing method. The second magnetic core 6 is fixed by further curing. According to such a method, compared to the case where the second magnetic core 6 is fixed using a silicon adhesive or the like having only a thermosetting property, after the position adjustment of the second magnetic core 6 Misalignment can be suppressed, and the inductance value of the coil 8 can be accurately adjusted. Thereby, the antenna coil 2 having a desired frequency with a small tolerance from the resonance frequency can be manufactured.
　本発明者らの実験では、上述した実施の形態１によるアンテナコイル２の製造方法によれば、熱硬化性のみの特性を有する接着剤を用いて第２磁性体コア６を固定した場合に比べて、アンテナコイル２の周波数の公差を半分以下に抑えることができた。 In the experiments of the present inventors, according to the method of manufacturing the antenna coil 2 according to the first embodiment described above, the second magnetic body core 6 is fixed using an adhesive having only the thermosetting property. Thus, the tolerance of the frequency of the antenna coil 2 can be reduced to half or less.
　以上、実施の形態１のアンテナコイル２の構成および製造方法について説明したが、様々な変形例が可能である。例えば、第２磁性体コア６を収容する収容部１２の構成について、様々な変形例が可能である。その具体的な変形例について、図７、図８を用いて説明する。 As mentioned above, although the structure and manufacturing method of the antenna coil 2 of Embodiment 1 were demonstrated, various modifications are possible. For example, various modifications can be made to the configuration of the accommodation unit 12 that accommodates the second magnetic core 6. The specific modification is demonstrated using FIG. 7, FIG.
　以下の変形例では、実施の形態１と異なる点について主に説明し、重複する内容については説明を省略する。また、同一又は同等の構成については同じ符号を付して説明する。 In the following modified example, points different from the first embodiment will be mainly described, and description of overlapping contents will be omitted. The same or equivalent configurations are described with the same reference numerals.
（変形例１）
　図７に、変形例１による収容部４０を示す。図７では、第２磁性体コア６および樹脂１４の図示を省略し、収容部４０のみを図示している。 (Modification 1)
The accommodating part 40 by the modification 1 is shown in FIG. In FIG. 7, the second magnetic core 6 and the resin 14 are omitted, and only the housing portion 40 is illustrated.
　図７に示すように、変形例１による収容部４０は、収容部４０の上端に位置する端縁部４２を内側に凹ませて凹部４４を設けている。凹部４４は、前述した紫外線１８を収容部４０に案内する付加的な光線経路として機能する。 As shown in FIG. 7, the accommodating portion 40 according to the first modification is provided with a recessed portion 44 by indenting the end edge portion 42 located at the upper end of the accommodating portion 40 inward. The recess 44 functions as an additional light beam path for guiding the ultraviolet light 18 described above to the housing 40.
　このような凹部４４を設けることで、前述した紫外線１８を樹脂１４のより広範囲に照射することができる。これにより、第１硬化ステップＳ４で樹脂１４をより広範囲で硬化させることができ、第１硬化ステップＳ４による第２磁性体コア６の位置決め精度を向上させることができる。 By providing such a recess 44, the ultraviolet rays 18 described above can be irradiated to a wider range of the resin 14. Thus, the resin 14 can be cured in a wider range in the first curing step S4, and the positioning accuracy of the second magnetic core 6 in the first curing step S4 can be improved.
　図７に示す例では凹部４４を３箇所に分けて設けているが、凹部４４の数、場所、大きさはこれらに限らない。また図７に示す例では、収容部４０の端縁部４２を凹ませて光線経路を設けているが、このような場合に限らない。収容部４０に切欠きを設ける、貫通孔を設けるなど、任意の方法により光線経路を設けてもよい。 Although the recessed part 44 is divided and provided in three places in the example shown in FIG. 7, the number of a recessed part 44, a place, and a magnitude | size are not restricted to these. Moreover, in the example shown in FIG. 7, although the edge part 42 of the accommodating part 40 is dented and the light ray path is provided, it does not restrict to such a case. The light beam path may be provided by any method such as providing a notch in the containing portion 40 or providing a through hole.
（変形例２）
　図８に、変形例２による収容部５０を示す。図８でも同様に、第２磁性体コア６および樹脂１４の図示を省略している。 (Modification 2)
The accommodating part 50 by the modification 2 is shown in FIG. Similarly, in FIG. 8, the second magnetic core 6 and the resin 14 are not shown.
　図８に示すように、収容部５０は内壁面５２を有しており、内壁面５２は収容部５０の底面および側面を構成する。変形例２による収容部５０では、内壁面５２の表面粗さＲａを１００以下に設定している。 As shown in FIG. 8, the housing portion 50 has an inner wall surface 52, and the inner wall surface 52 constitutes the bottom and side surfaces of the housing portion 50. In the housing portion 50 according to the second modification, the surface roughness Ra of the inner wall surface 52 is set to 100 or less.
　このような構成によれば、収容部５０内において紫外線１８が反射しやすくなるため、樹脂１４をより広範囲で硬化させることができる。これにより、第１硬化ステップＳ４による第２磁性体コア６の位置決め精度を向上させることができる。 According to such a configuration, since the ultraviolet light 18 is easily reflected in the housing portion 50, the resin 14 can be cured in a wider range. Thereby, the positioning accuracy of the 2nd magnetic material core 6 by 1st hardening step S4 can be improved.
　収容部５０の内壁面５２の表面粗さの設定は例えば、内壁面５２を構成する材料を表面粗さの低いものを選択する、あるいは、内壁面５２の表面を滑らかにする加工を行うことで実現してもよい。 The surface roughness of the inner wall surface 52 of the housing portion 50 is set, for example, by selecting the material forming the inner wall surface 52 as one having a low surface roughness, or by performing processing to make the surface of the inner wall surface 52 smooth. It may be realized.
（変形例３）
　図８に示す変形例２では、内壁面５２の表面粗さを設定する場合について説明したが、このような場合に限らず、内壁面５２を構成する材料（例えばプラスチック）よりも光反射性の高い材料を内壁面５２に付着・溶着させてもよい。このような場合であっても、収容部５０内において紫外線１８が反射しやすくなるため、樹脂１４をより広範囲で硬化させることができ、第１硬化ステップＳ４による第２磁性体コア６の位置決め精度を向上させることができる。 (Modification 3)
Although the modification 2 shown in FIG. 8 describes the case where the surface roughness of the inner wall 52 is set, the present invention is not limited to such a case, and it is more reflective than the material (for example, plastic) constituting the inner wall 52. A high material may be adhered and welded to the inner wall surface 52. Even in such a case, since the ultraviolet rays 18 are easily reflected in the housing portion 50, the resin 14 can be cured in a wider range, and the positioning accuracy of the second magnetic core 6 in the first curing step S4 Can be improved.
（変形例４）
　さらに、実施の形態１ではボビン１０全体を黒色のプラスチックで構成したが、このような場合に限らず、内壁面５２の色を白色としてもよい。また、内壁面５２の色は光反射性の高い色、例えば銀色であってもよい。このような場合であっても、収容部５０内において紫外線１８が反射しやすくなるため、樹脂１４をより広範囲で硬化させることができ、第１硬化ステップＳ４による第２磁性体コア６の位置決め精度を向上させることができる。
（実施の形態２）
　本発明に係る実施の形態２のアンテナコイルについて、図９を用いて説明する。なお、実施の形態２では、主に実施の形態１と異なる点について説明する。 (Modification 4)
Furthermore, although the entire bobbin 10 is made of black plastic in the first embodiment, the present invention is not limited to such a case, and the color of the inner wall 52 may be white. Further, the color of the inner wall surface 52 may be a color having high light reflectivity, such as silver. Even in such a case, since the ultraviolet rays 18 are easily reflected in the housing portion 50, the resin 14 can be cured in a wider range, and the positioning accuracy of the second magnetic core 6 in the first curing step S4 Can be improved.
Second Embodiment
The antenna coil of Embodiment 2 which concerns on this invention is demonstrated using FIG. In the second embodiment, points different from the first embodiment will be mainly described.
　実施の形態１では、第２磁性体コア６を回転させて位置調整していたのに対して、実施の形態２では、第２磁性体コア６４を第１磁性体コア６２に対して摺動させて位置調整を行う点が、実施の形態１と異なる。また実施の形態１では、第１磁性体コア４および第２磁性体コア６をボビン１０に収容し、ボビン１０にコイル８を巻回していたのに対して、実施の形態２ではボビンを設けず、第１磁性体コア６２の周囲にコイル６６を直接巻回している。 In the first embodiment, the position adjustment is performed by rotating the second magnetic core 6, whereas in the second embodiment, the second magnetic core 64 is slid relative to the first magnetic core 62. This embodiment differs from the first embodiment in that the position adjustment is performed. In the first embodiment, the first magnetic core 4 and the second magnetic core 6 are accommodated in the bobbin 10, and the coil 8 is wound around the bobbin 10. In the second embodiment, the bobbin is provided. Instead, the coil 66 is directly wound around the first magnetic core 62.
　図９に示すように、実施の形態２のアンテナコイル６０は、第１磁性体コア６２と、第２磁性体コア６４と、コイル６６とを備える。 As shown in FIG. 9, the antenna coil 60 of the second embodiment includes a first magnetic core 62, a second magnetic core 64, and a coil 66.
　第１磁性体コア６２および第２磁性体コア６４は、フェライトなどの磁性体材料によって棒状に構成されている。第１磁性体コア６２には、軸方向Ｄに延びる溝６８が設けられている。溝６８の中には第２磁性体コア６４が摺動可能に配置される。 The first magnetic core 62 and the second magnetic core 64 are formed in a rod shape by a magnetic material such as ferrite. The first magnetic core 62 is provided with a groove 68 extending in the axial direction D. The second magnetic core 64 is slidably disposed in the groove 68.
　第１磁性体コア６２の周囲にはコイル６６が巻回されている。コイル６６は、溝６８に配置された第２磁性体コア６４の摺動には干渉しない。 A coil 66 is wound around the first magnetic core 62. The coil 66 does not interfere with the sliding of the second magnetic core 64 disposed in the groove 68.
　このような構成において、第１磁性体コア６２に対して第２磁性体コア６４をＤ方向に摺動させることにより、第１磁性体コア６２に対する第２磁性体コア６４の相対的な位置が変わる。実施の形態１と同様に、コイル６６のインダクタンス値を所定の共振周波数に対応するインダクタンス値となるように、第２磁性体コア６４の摺動位置が調整される。 In such a configuration, by sliding the second magnetic core 64 in the D direction with respect to the first magnetic core 62, the relative position of the second magnetic core 64 with respect to the first magnetic core 62 is determined. change. As in the first embodiment, the sliding position of the second magnetic core 64 is adjusted so that the inductance value of the coil 66 becomes the inductance value corresponding to the predetermined resonance frequency.
　第２磁性体コア６４の位置を調整した後、前述した実施の形態１と同様の樹脂１４（図９では図示を省略）を硬化させることにより、第２磁性体コア６４を固定する。樹脂１４は例えば、第１磁性体コア６２と第２磁性体コア６４の間の隙間に充填してもよい。 After adjusting the position of the second magnetic core 64, the second magnetic core 64 is fixed by curing the resin 14 (not shown in FIG. 9) similar to that of the first embodiment described above. For example, the resin 14 may be filled in the gap between the first magnetic core 62 and the second magnetic core 64.
　上述した実施の形態２のアンテナコイル６０の製造方法は、実施の形態１のアンテナコイル２の製造方法と同様である。具体的には、図９に示す構成において、樹脂１４を配置する前のアンテナコイル６０を準備する準備ステップＳ１１を行う。次に、第２磁性体コア６４の周囲に樹脂１４を配置する樹脂配置ステップＳ１２を行う。次に、第１磁性体コア６２に対する第２磁性体コア６４の相対的な位置を調整する位置調整ステップＳ１３を行う。次に、樹脂１４の少なくとも露出面２０を硬化させる第１硬化ステップＳ１４を行う。次に、アンテナコイル６０を加熱室２６に移動させる移動ステップＳ１５を行う。次に、樹脂１４の未硬化部分２４を硬化させる第２硬化ステップＳ１６を行う。 The method of manufacturing the antenna coil 60 of the second embodiment described above is the same as the method of manufacturing the antenna coil 2 of the first embodiment. Specifically, in the configuration shown in FIG. 9, a preparation step S11 of preparing the antenna coil 60 before placing the resin 14 is performed. Next, a resin disposing step S12 of disposing the resin 14 around the second magnetic core 64 is performed. Next, position adjustment step S13 which adjusts the relative position of the 2nd magnetic body core 64 to the 1st magnetic body core 62 is performed. Next, a first curing step S14 of curing at least the exposed surface 20 of the resin 14 is performed. Next, a moving step S15 of moving the antenna coil 60 to the heating chamber 26 is performed. Next, a second curing step S16 of curing the uncured portion 24 of the resin 14 is performed.
　これらのステップＳ１１－Ｓ１６を行うことにより、第２磁性体コア６４を精度良く位置決めし、コイル６６のインダクタンス値を精度良く調整することができる。これにより、共振周波数からの公差が小さい所望の周波数を有するアンテナコイル６０を製造することができ、実施の形態１のアンテナコイル２と同様の効果を奏することができる。 By performing these steps S11 to S16, it is possible to accurately position the second magnetic core 64 and adjust the inductance value of the coil 66 with high accuracy. Thereby, the antenna coil 60 having a desired frequency with a small tolerance from the resonance frequency can be manufactured, and the same effect as the antenna coil 2 of the first embodiment can be obtained.
　上述したアンテナコイル６０の製造方法については実施の形態１と同様であるため、図示を省略する。 The method of manufacturing the above-described antenna coil 60 is the same as that of the first embodiment, so the illustration is omitted.
　以上、上述の実施の形態１、２を挙げて本発明を説明したが、本発明は上述の実施の形態１、２に限定されない。例えば、実施の形態１では、第１硬化ステップＳ４において、紫外線硬化性樹脂を含む樹脂１４に紫外線１８を照射して紫外線硬化を行う場合について説明したが、このような場合に限らない。紫外線とは異なる波長の光線を照射することにより、樹脂１４を硬化させるようにしてもよい。この場合、樹脂１４は紫外線硬化性樹脂に限らず「光硬化性樹脂」を含むものであればよい。すなわち、第１硬化ステップＳ４は、任意の波長の光線を用いた光硬化法により樹脂１４の少なくとも露出面２０を硬化させるものであればよい。ただし、実施の形態１のように、光硬化性樹脂の中でも特に紫外線硬化性樹脂を含む樹脂１４を用いた場合には、汎用的な樹脂を用いることができ、アンテナコイル２の製造コストを低減することができる。 The present invention has been described above by citing the above first and second embodiments, but the present invention is not limited to the above first and second embodiments. For example, in the first embodiment, the case where the ultraviolet curing is performed by irradiating the ultraviolet ray 18 to the resin 14 including the ultraviolet curable resin in the first curing step S4 has been described, but the present invention is not limited thereto. The resin 14 may be cured by irradiating a light beam having a wavelength different from that of the ultraviolet light. In this case, the resin 14 is not limited to the ultraviolet curable resin as long as it contains a "photo curable resin". That is, the first curing step S4 may be any curing of at least the exposed surface 20 of the resin 14 by a photo-curing method using a light beam of an arbitrary wavelength. However, as in the first embodiment, when the resin 14 containing an ultraviolet curable resin is used among the photocurable resins, a general-purpose resin can be used, and the manufacturing cost of the antenna coil 2 is reduced. can do.
　また実施の形態１では、第２硬化ステップＳ６において、熱硬化性の特性を有する樹脂１４を加熱することにより熱硬化を行う場合について説明したが、このような場合に限らない。例えば、樹脂１４は熱硬化性を有さず、樹脂１４を常温下で放置することで樹脂１４の未硬化部分２４を硬化させてもよい。すなわち、第２硬化ステップＳ６は、第１硬化ステップＳ４の光硬化法とは異なる任意の硬化法により、樹脂１４の未硬化部分２４を硬化させるものであればよい。ただし、実施の形態１のように、樹脂１４が熱硬化性の特性を有して第２硬化ステップＳ６を熱硬化法により実行した場合には、放置して硬化させる場合に比べて第２硬化ステップＳ６を早く完了することができる。また第１硬化ステップＳ４で樹脂１４の露出面２０を硬化させているため、第２硬化ステップＳ６で熱を用いた場合でも、熱膨張などの影響による第２磁性体コア６の位置ずれは抑制されており、第２磁性体コア６の位置決めを精度良く行うことができる。 In the first embodiment, the case of performing the thermal curing by heating the resin 14 having the thermosetting property in the second curing step S6 has been described, but the present invention is not limited to such a case. For example, the resin 14 does not have thermosetting property, and the uncured portion 24 of the resin 14 may be cured by leaving the resin 14 at normal temperature. That is, 2nd hardening step S6 should just harden the unhardened part 24 of resin 14 with the arbitrary hardening methods different from the photocuring method of 1st hardening step S4. However, as in the first embodiment, when the resin 14 has a thermosetting property and the second curing step S6 is performed by a thermal curing method, the second curing is performed as compared to the case where the resin 14 is left to be cured. Step S6 can be completed early. Further, since the exposed surface 20 of the resin 14 is cured in the first curing step S4, even when heat is used in the second curing step S6, the positional deviation of the second magnetic core 6 due to the influence of thermal expansion and the like is suppressed The second magnetic core 6 can be positioned with high accuracy.
　また実施の形態１では、第１硬化ステップＳ４と第２硬化ステップＳ６の間に移動ステップＳ５を設ける場合について説明したが、このような場合に限らず、移動ステップＳ５を設けない場合であってもよい。すなわち、第１硬化ステップＳ４と第２硬化ステップＳ６でアンテナコイル２を移動させずに、同じ場所で連続的に実行してもよい。ただし、第１硬化ステップＳ４と第２硬化ステップＳ６の間に移動ステップＳ５を設けた場合には、それぞれのステップに適した装置構成とすることができ、それぞれのステップを精度良く実施することができる。 In the first embodiment, the case where the moving step S5 is provided between the first curing step S4 and the second curing step S6 has been described. However, the present invention is not limited to such a case. It is also good. That is, without moving the antenna coil 2 in the first curing step S4 and the second curing step S6, the process may be performed continuously in the same place. However, when the moving step S5 is provided between the first curing step S4 and the second curing step S6, an apparatus configuration suitable for each step can be obtained, and each step can be performed with high accuracy. it can.
　また実施の形態１では、第２磁性体コア６を収容部１２に配置してから、樹脂１４を収容部１２に配置する場合について説明したが、このような場合に限らず、逆の順序であってもよい。すなわち、樹脂１４を収容部１２に配置してから、第２磁性体コア６を収容部１２に配置してもよい。言い換えれば、遅くとも第１硬化ステップＳ４の開始時に、第２磁性体コア６の周囲に樹脂１４を配置した状態とすればよい。 In the first embodiment, the case where the resin 14 is disposed in the accommodation portion 12 after the second magnetic core 6 is disposed in the accommodation portion 12 has been described. However, the present invention is not limited to such a case. It may be. That is, after the resin 14 is disposed in the accommodation portion 12, the second magnetic core 6 may be disposed in the accommodation portion 12. In other words, the resin 14 may be disposed around the second magnetic core 6 at the start of the first curing step S4 at the latest.
　本開示は、添付図面を参照しながら好ましい実施の形態に関連して充分に記載されているが、この技術の熟練した人々にとっては種々の変形や修正は明白である。そのような変形や修正は、添付した特許請求の範囲による本開示の範囲から外れない限りにおいて、その中に含まれると理解されるべきである。また、各実施の形態における要素の組合せや順序の変化は、本開示の範囲及び思想を逸脱することなく実現し得るものである。 While the present disclosure has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art. Such variations and modifications are to be understood as included within the scope of the present disclosure as set forth in the appended claims unless they depart therefrom. In addition, changes in combination or order of elements in each embodiment can be realized without departing from the scope and spirit of the present disclosure.
　なお、前記様々な実施の形態および変形例のうちの任意の実施の形態あるいは変形例を適宜組み合わせることにより、それぞれの有する効果を奏するようにすることができる。 In addition, the effect which each has can be show | played by combining suitably the arbitrary embodiment or modification of said various embodiment and modification.
　本発明は、アンテナコイルおよびその製造方法であれば適用可能である。 The present invention is applicable if it is an antenna coil and its manufacturing method.
　２　アンテナコイル
　４　第１磁性体コア
　６　第２磁性体コア
　８　コイル
１０　ボビン
１２　収容部
１４　樹脂
１６　紫外線照射部
１８　紫外線
２０　露出面
２２　硬化部分
２４　未硬化部分
２６　加熱室
２８　紫外線照射室
３０　加熱手段
３２　搬送部
４０　収容部
４２　端縁部
４４　凹部（光線経路）
５０　収容部
５２　内壁面
６０　アンテナコイル
６２　第１磁性体コア
６４　第２磁性体コア
６６　コイル
６８　溝 Reference Signs List 2 antenna coil 4 first magnetic core 6 second magnetic core 8 coil 10 bobbin 12 accommodation portion 14 resin 16 ultraviolet ray irradiation portion 18 ultraviolet ray 20 exposed surface 22 cured portion 24 uncured portion 26 heating chamber 28 ultraviolet irradiation chamber 30 heating means 32 conveyance part 40 accommodation part 42 edge part 44 recessed part (light ray path)
Reference Signs List 50 accommodation unit 52 inner wall surface 60 antenna coil 62 first magnetic core 64 second magnetic core 66 coil 68 groove

Claims (17)

  1. 　第１磁性体コアと、前記第１磁性体コアの周囲に巻回されたコイルと、前記第１磁性体コアに対する相対的な位置を調整可能な第２磁性体コアと、を備えるアンテナコイルを準備する準備ステップと、
    　前記コイルのインダクタンス値を共振周波数に対応するインダクタンス値に近付けるように、前記第１磁性体コアに対する前記第２磁性体コアの相対的な位置を調整する位置調整ステップと、
    　前記位置調整ステップの後、前記第２磁性体コアの周囲に配置された光硬化性樹脂を含む樹脂に対して光線を照射することにより、前記光硬化性樹脂の少なくとも露出面を硬化させる第１硬化ステップと、
    　前記第１硬化ステップの後、前記光硬化性樹脂を含む前記樹脂の未硬化部分を光硬化以外の硬化法により硬化させる第２硬化ステップと、
    　を含む、アンテナコイルの製造方法。     An antenna coil comprising a first magnetic core, a coil wound around the first magnetic core, and a second magnetic core whose relative position to the first magnetic core can be adjusted Preparation steps to prepare
    Adjusting the position of the second magnetic core relative to the first magnetic core such that the inductance of the coil approaches the inductance corresponding to the resonance frequency;
    After the position adjusting step, at least the exposed surface of the photocurable resin is cured by irradiating a light beam to a resin containing the photocurable resin disposed around the second magnetic substance core. A curing step,
    A second curing step of curing the uncured portion of the resin containing the photocurable resin by a curing method other than photo curing after the first curing step;
    And a method of manufacturing an antenna coil.
  2. 　前記光硬化性樹脂は熱硬化性樹脂である、あるいは、前記光硬化性樹脂を含む前記樹脂は熱硬化性樹脂をさらに含み、
    　前記第２硬化ステップは、前記光硬化性樹脂を含む前記樹脂の未硬化部分を熱硬化法により硬化させる、請求項１に記載のアンテナコイルの製造方法。     The photocurable resin is a thermosetting resin, or the resin containing the photocurable resin further includes a thermosetting resin,
    The method for manufacturing an antenna coil according to claim 1, wherein the second curing step cures the uncured portion of the resin containing the photocurable resin by a thermal curing method.
  3. 　前記第１硬化ステップと前記第２硬化ステップの間に、前記アンテナコイルを加熱室に移動させる移動ステップをさらに含む、請求項２に記載のアンテナコイルの製造方法。 The method for manufacturing an antenna coil according to claim 2, further comprising: moving the antenna coil to a heating chamber between the first curing step and the second curing step.
  4. 　前記光硬化性樹脂は紫外線硬化性樹脂であり、
    　前記第１硬化ステップで用いる光線は紫外線である、請求項１から３のいずれか１つに記載のアンテナコイルの製造方法。     The photocurable resin is an ultraviolet curable resin,
    The method for manufacturing an antenna coil according to any one of claims 1 to 3, wherein the light beam used in the first curing step is ultraviolet light.
  5. 　前記第１磁性体コアおよび前記第２磁性体コアを収容するボビンをさらに備え、前記ボビンの胴部に前記コイルが巻回されており、前記ボビンには、前記第２磁性体コアを収容する凹状の収容部が設けられている、請求項１から４のいずれか１つに記載のアンテナコイルの製造方法。 The bobbin further includes a bobbin that accommodates the first magnetic core and the second magnetic core, the coil is wound around a barrel of the bobbin, and the bobbin accommodates the second magnetic core. The method for manufacturing an antenna coil according to any one of claims 1 to 4, wherein a concave housing portion is provided.
  6. 　前記ボビンとして、前記収容部の端縁部に光線経路を設けた前記ボビンを用いる、請求項５に記載のアンテナコイルの製造方法。 The method for manufacturing an antenna coil according to claim 5, wherein the bobbin having a light beam path at an end edge portion of the accommodating portion is used as the bobbin.
  7. 　前記収容部の内壁面に、前記内壁面を構成する材料よりも光反射性の高い材料を付着させた、請求項５又は６に記載のアンテナコイルの製造方法。 The method for manufacturing an antenna coil according to claim 5, wherein a material having light reflectivity higher than that of the material forming the inner wall surface is attached to the inner wall surface of the housing portion.
  8. 　前記収容部の内壁面の表面粗さＲａを１００以下に設定した、請求項５から７のいずれか１つに記載のアンテナコイルの製造方法。 The manufacturing method of the antenna coil as described in any one of Claim 5 to 7 which set surface roughness Ra of the inner wall face of the said accommodating part to 100 or less.
  9. 　前記収容部の内壁面の色を白色にした、請求項５から８のいずれか１つに記載のアンテナコイルの製造方法。 The manufacturing method of the antenna coil as described in any one of Claim 5 to 8 which made the color of the inner wall face of the said accommodating part white.
  10. 　第１磁性体コアと、
    　前記第１磁性体コアの周囲に巻回されたコイルと、
    　第２磁性体コアと、を備え、
    　前記第２磁性体コアは、その周囲に配置された光硬化性樹脂を含む樹脂が硬化したもので固定されている、アンテナコイル。     A first magnetic core,
    A coil wound around the first magnetic core;
    A second magnetic core;
    An antenna coil, wherein the second magnetic core is fixed with a cured resin containing a photocurable resin disposed around the second magnetic core.
  11. 　前記光硬化性樹脂は熱硬化性樹脂である、あるいは、前記光硬化性樹脂を含む前記樹脂は熱硬化性樹脂をさらに含む、請求項１０に記載のアンテナコイル。 The antenna coil according to claim 10, wherein the photocurable resin is a thermosetting resin, or the resin containing the photocurable resin further comprises a thermosetting resin.
  12. 　前記光硬化性樹脂は紫外線硬化性樹脂である、請求項１０又は１１に記載のアンテナコイル。 The antenna coil according to claim 10, wherein the photocurable resin is an ultraviolet curable resin.
  13. 　前記第１磁性体コアおよび前記第２磁性体コアを収容するボビンをさらに備え、前記ボビンの胴部には前記コイルが巻回されており、前記ボビンには、前記第２磁性体コアを収容する凹状の収容部が設けられている、請求項１０から１２のいずれか１つに記載のアンテナコイル。 The bobbin further includes a bobbin accommodating the first magnetic body core and the second magnetic body core, the coil is wound around a body portion of the bobbin, and the second magnetic body core is accommodated in the bobbin. The antenna coil according to any one of claims 10 to 12, wherein a concave housing is provided.
  14. 　前記ボビンには、前記収容部の端縁部に光線経路を設けている、請求項１３に記載のアンテナコイル。 The antenna coil according to claim 13, wherein a light ray path is provided at an end edge portion of the housing portion on the bobbin.
  15. 　前記収容部の内壁面に、前記内壁面を構成する材料よりも光反射性の高い材料を付着させた、請求項１３又は１４に記載のアンテナコイル。 The antenna coil according to claim 13, wherein a material having higher light reflectivity than the material forming the inner wall surface is attached to the inner wall surface of the housing portion.
  16. 　前記収容部の内壁面の表面粗さＲａを１００以下に設定した、請求項１３から１５のいずれか１つに記載のアンテナコイル。 The antenna coil according to any one of claims 13 to 15, wherein a surface roughness Ra of an inner wall surface of the housing portion is set to 100 or less.
  17. 　前記収容部の内壁面の色を白色にした、請求項１３から１６のいずれか１つに記載のアンテナコイル。 The antenna coil according to any one of claims 13 to 16, wherein a color of an inner wall surface of the housing portion is white.
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