JP2015035494A - Resonator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resonator capable of easily adjusting a resonant frequency in short time.SOLUTION: A resonator 1 includes: a core member 11 formed of a magnetic material; a wound coil 12; an adjustment hole H formed at the core member 11 for resonant frequency adjustment; and an adjustment jig 20, formed of a magnetic material and a nonmagnetic material, inserted into the adjustment hole H for adjusting a resonant frequency.

Description

  The present invention relates to a resonator.

  In recent years, a non-contact power feeding system that can perform power feeding from the power feeding side to the power receiving side in a non-contact manner without connecting the power feeding side and the power receiving side with a wiring (cable) has been used in various applications. For example, an application for supplying power for charging a battery mounted on a vehicle such as an electric vehicle or a hybrid vehicle or a consumer device such as a household appliance, an industrial device (for example, a stage, an arm) , Cranes, robots, etc.) for use in supplying electric power.

  As one of power feeding methods used in such a non-contact power feeding system, a “magnetic resonance method” is known. The “magnetic field resonance method” is a power supply method in which a resonator composed of a coil and a capacitor is provided on both the power supply side and the power reception side, and electric power is supplied in a non-contact manner by resonating the magnetic field between both resonators. This “magnetic resonance method” is characterized by being capable of high-efficiency and long-distance power supply with a weak magnetic field, compared to “electromagnetic induction method”, which is one of the other power supply methods widely used in practice. It is attracting attention as a next-generation wireless power transfer technology. For details of the above-mentioned “magnetic resonance method”, see, for example, Patent Document 1 below.

JP 2010-130878 A

  Incidentally, as described above, in a non-contact power feeding system using the “magnetic resonance method”, in order to supply power in a non-contact manner, it is necessary to resonate a power feeding side resonator and a power receiving side resonator. Therefore, in such a non-contact power supply system, it is necessary to accurately adjust the resonance frequencies of both the resonator provided on the power supply side and the resonator provided on the power reception side from the viewpoint of realizing efficient power supply. is there.

  Conventionally, the number of capacitors mounted on the resonator and the number of coils (inductors) are adjusted while checking the waveform of each part of the wireless power supply system (for example, the waveform of the current flowing through the resonator). Since the resonance frequency was adjusted by this, there was a problem that it took a lot of time for the adjustment. In particular, in the case of mass production of resonators, the production efficiency of the resonator is greatly influenced by the efficiency of the adjustment operation described above. Therefore, in order to increase the production efficiency of the resonator, it is necessary to improve the adjustment efficiency of the resonance frequency. .

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a resonator capable of easily adjusting a resonance frequency in a short time.

In order to solve the above-described problems, a resonator according to the present invention includes a core member (11, 31, 41, 61) formed of a magnetic material and a wound coil (12, 62) ( 1 to 3), the adjustment holes (H, H1 to H3) formed in the core member for adjusting the resonance frequency, the magnetic material (21, 71), and the nonmagnetic material (22, 72) are formed. And adjusting jigs (20, 20a to 20c, 50a to 50c, 70a, 70b) inserted into the adjusting holes in order to adjust the resonance frequency.
In the resonator according to the aspect of the invention, a plurality of the adjustment holes may be formed in the core member, and the adjustment jig may be inserted into the adjustment holes by the number corresponding to the adjustment amount of the resonance frequency. In the resonator according to the aspect of the invention, the core member includes a plurality of adjustment holes having different depths, and the adjustment hole has a length suitable for the depth. It is characterized in that a tool is inserted.
In the resonator of the present invention, the adjustment jig is laminated on the plate-like magnetic body (21) and the magnetic body, and the thickness of the adjustment jig is adjusted to a thickness suitable for the size of the adjustment hole. The adjustment jig is characterized in that the adjustment jig having the magnetic material having a thickness suitable for adjustment of the resonance frequency is inserted into the adjustment hole.
In the resonator according to the aspect of the invention, the adjusting jig may be a mixture of a magnetic material and a nonmagnetic material, and the adjusting hole may have a ratio of the magnetic material and the nonmagnetic material to the resonance. The adjustment jig set to be suitable for frequency adjustment is inserted.
The resonator according to the present invention includes a lid member (C1) that prevents the adjustment jig inserted into the adjustment hole from falling off.
The resonator of the present invention includes a capacitor that is connected to the coil and forms a resonance circuit together with the coil.

  According to the present invention, an adjustment hole for adjusting the resonance frequency is formed in the core member, and an adjustment jig formed of a magnetic material and a nonmagnetic material is inserted into the adjustment hole to adjust the resonance frequency. Therefore, the resonance frequency can be adjusted simply by inserting the adjustment jig into the adjustment hole, and the resonance frequency can be easily adjusted in a short time.

It is a figure which shows the principal part structure of the coil part with which the resonator by 1st Embodiment of this invention is provided. It is a figure which shows the principal part structure of the coil part main body in 1st Embodiment of this invention. It is a figure which shows the structure of the adjustment jig in 1st Embodiment of this invention. It is a figure which shows the principal part structure of the coil part with which the resonator by 2nd Embodiment of this invention is provided. It is a figure which shows the principal part structure of the coil part with which the resonator by 3rd Embodiment of this invention is provided. It is a figure which shows the structure of the adjustment jig in 3rd Embodiment of this invention. It is a figure which shows the structure of the adjustment jig in 4th Embodiment of this invention. It is a figure which shows the principal part structure of the coil part main body in 5th Embodiment of this invention. It is a figure which shows the structure of the adjustment jig in 5th Embodiment of this invention.

  Hereinafter, a resonator according to an embodiment of the present invention will be described in detail with reference to the drawings. Here, the resonator according to the present embodiment is composed of a coil part having a coil and a capacitor part having a capacitor. However, in order to simplify the description, the coil part which is a characteristic part will be described below. Description of the part is omitted.

[First Embodiment]
FIGS. 1A and 1B are diagrams showing a main configuration of a coil unit included in the resonator according to the first embodiment of the present invention, in which FIG. 1A is a front perspective view and FIG. 1B is a bottom perspective view. As shown in FIG. 1, the resonator 1 includes a coil part body 10 and an adjustment jig 20. FIGS. 2A and 2B are diagrams showing the configuration of the main part of the coil section body in the first embodiment of the present invention, wherein FIG. 2A is a front perspective view, and FIG. 2B is a bottom perspective view. FIG. 3 is a diagram showing the configuration of the adjustment jig in the first embodiment of the present invention.

  As shown in FIG. 2, the coil body 10 has a configuration in which a core member 11 formed of a magnetic material and a coil 12 wound around the core member 11 are accommodated in a casing C. The core member 11 is a rectangular parallelepiped member made of a magnetic material such as ferrite. An adjustment hole H into which the adjustment jig 20 is inserted in the center of the core member 11 is an inductance adjustment hole for the coil body 10 and is a jig for adjusting the inductance of the coil body 10. Is formed.

  The adjustment hole H has a rectangular cross-sectional shape as shown in FIG. 2B, and is formed so as to penetrate the core member 11 in the axial direction of the coil 12 as shown in FIG. Yes. On the bottom surface of the housing C, a notch into which the adjustment jig 20 is inserted is formed at a position corresponding to the adjustment hole H. In addition, the resonance frequency of the resonator 1 is adjusted by adjusting the inductance of the coil unit body 10 by the adjusting jig 20.

  The coil 12 is a coil (solenoid type coil) in which a conducting wire such as a round wire or a rectangular wire is wound around the core member 11 in a spiral shape and a rectangular tube shape, and a capacitor provided in a capacitor portion (not shown). Connected. This capacitor forms a resonance circuit together with the coil 12. The conducting wire forming the coil 12 is an insulating film-coated wire in which the surface of a metal wire such as copper (Cu) or silver (Ag) is covered with an insulating film. Note that the diameter and the number of turns of the conducting wire forming the coil 12 are appropriately set according to the inductance value to be realized.

  As shown in FIG. 3A, the adjustment jig 20 includes a plate-like magnetic body 21 and plate-like nonmagnetic bodies 22, 22 so that the magnetic body 21 is sandwiched between the nonmagnetic bodies 22, 22. Are laminated. The entire adjustment jig 20 is inserted into an adjustment hole H formed in the core member 11 of the coil unit body 10 in order to adjust the inductance of the coil unit body 10. As shown in FIG. 1, the adjustment jig 20 is accommodated in the casing C in the coil section body 10 in which the adjustment of the inductance is completed, and the adjustment jig is provided in the notch formed on the bottom surface of the casing C. A lid member C1 for preventing the 20 from falling off is attached.

  The magnetic body 21 constituting the adjustment jig 20 is a plate-like member formed of a magnetic material such as ferrite. On the other hand, the nonmagnetic materials 22 and 22 forming the adjustment jig 20 are plate-like members formed of a nonmagnetic material such as an acrylic resin. The width W of the magnetic body 21 and the non-magnetic bodies 22 and 22 is set to be approximately the same as the size (inner diameter) of the adjustment hole H formed in the core member 11, and the laminated magnetic body 21 and non-magnetic body 21 are non-magnetic. The total thickness T of the bodies 22 and 22 is set to be approximately the same as the size (inner diameter) of the adjustment hole H formed in the core member 11.

  That is, the width and thickness of the adjustment jig 20 are set to be approximately the same as the size (inner diameter) of the adjustment hole H. When the adjustment jig 20 has the same width and thickness, even if the adjustment jig 20 is inserted into the state shown in FIG. 1B, the adjustment jig 20 is rotated by 90 ° from the state shown in FIG. The adjusting jig 20 may be inserted. When adjusting the inductance of the coil body 10, not only the adjustment jig 20 is inserted into the adjustment hole H but also the adjustment jig 20 inserted into the adjustment hole H can be taken out. For this reason, it is desirable to set the width and thickness of the adjustment jig 20 slightly smaller than the size (inner diameter) of the adjustment hole H.

  Here, as shown in FIG. 3B, the adjustment jig 20 has the same width and thickness, but a plurality of the magnetic bodies 21 having different thicknesses are prepared in advance. Such adjustment jigs 20 have different magnetic permeability. For this reason, with an adjustment jig 20, the inductance of the coil body 10 cannot be adjusted at all, or even when the adjustment of the inductance is insufficient, the adjustment jig with a different thickness of the magnetic body 21. By replacing with 20 (adjustment jig 20 having a magnetic body 21 having a thickness suitable for adjusting the inductance), the inductance of the coil section body 10 can be adjusted.

  3B, although the thickness of the magnetic body 21 is different from each other, the width and thickness (by adjusting the thickness of the non-magnetic body 22 according to the thickness of the magnetic body 21). The overall thickness T) is the same. For this reason, the non-magnetic body 22 provided in the adjustment jig 20 “absorbs the difference in thickness of the magnetic body 21 and sets the overall thickness T of the adjustment jig 20 to a certain thickness (the size of the adjustment hole H). It can also be said to be “thickness suitable for the thickness”.

  The adjusting jig 20 shown in FIG. 3B is prepared by preparing a nonmagnetic body 22 having a thickness corresponding to the thickness of the magnetic body 21 in advance, laminating the magnetic body 21 and the nonmagnetic body 22, and performing pressure bonding or the like. Can be formed. However, it is troublesome to prepare a plurality of non-magnetic bodies 22 having different thicknesses in addition to the magnetic bodies 21 having different thicknesses. For this reason, for example, a plurality of magnetic thin plates and non-magnetic thin plates each having a predetermined reference thickness are prepared, and the number of magnetic thin plates stacked according to the thickness of the magnetic member 21 to be formed and The adjusting jig 20 may be formed by adjusting the number of non-magnetic thin plates and pressing the laminated magnetic thin plates and non-magnetic thin plates.

  Next, a method for adjusting the resonance frequency (inductance of the coil body 10) of the resonator 1 having the above configuration will be described. Here, in order to simplify the explanation, it is assumed that an adjustment jig (a plurality of adjustment jigs having different thicknesses of the magnetic body 21) shown in FIG. It is assumed that an approximate register of an adjustment jig capable of adjusting the inductance of 10 is attached. Here, an example in which the resonance frequency of the resonator 1 is adjusted at the place where the coil unit body 10 is installed will be described.

  First, an operator performs an operation of installing the coil unit body 10 conveyed to the installation location. Here, for example, when an iron plate or the like is provided at the installation location of the coil unit main body 10 and the coil unit main body 10 is installed on the iron plate or the like, the inductance of the coil unit main body 10 changes. There is. Next, the operator uses the adjustment jig 20 to adjust the inductance of the installed coil body 10 (adjustment of the resonance frequency of the resonator 1).

  Specifically, one of the adjustment jigs 20 (an adjustment jig having an approximate register that can adjust the inductance of the coil unit body 10) is inserted into the adjustment hole H of the coil unit body 10, and the resonator 1 Check whether the resonance frequency has reached the required resonance frequency. When it is confirmed that the resonance frequency of the resonator 1 is not the required resonance frequency, the operator takes out the adjustment jig 20 inserted in the adjustment hole H, and supplies another adjustment jig 20 (magnetic material). An adjustment jig 20) having a different thickness 21 is inserted into the adjustment hole H of the coil body 10, and it is checked again whether or not the resonance frequency of the resonator 1 has reached the required resonance frequency. On the other hand, when it is confirmed that the resonance frequency of the resonator 1 has reached the required resonance frequency, the operator performs an operation of attaching the lid member C1 to the bottom surface of the casing C and ends the adjustment operation.

  As described above, in the present embodiment, the adjustment hole H for adjusting the resonance frequency is formed in the core member 11 of the coil body 10, and the adjustment jig 20 formed of the magnetic body 21 and the nonmagnetic body 22 is adjusted. The resonance frequency is adjusted by being inserted into the hole H. As a result, the resonance frequency can be adjusted simply by inserting the adjustment jig 20 into the adjustment hole H, so that the resonance frequency can be easily adjusted in a short time.

[Second Embodiment]
FIGS. 4A and 4B are diagrams showing the main configuration of the coil unit included in the resonator according to the second embodiment of the present invention, where FIG. 4A is a front perspective view and FIG. 4B is a bottom perspective view. In FIG. 4A, the coil 12 is not shown in order to avoid complicating the drawing and facilitate understanding. In FIG. 4, the same members as those shown in FIG. 1 are denoted by the same reference numerals.

  As shown in FIG. 4, the resonator 2 according to the present embodiment can include a plurality of adjustment jigs 20 provided with a coil part body 30 instead of the coil part body 10 in FIG. 1. The coil part body 30 has a configuration in which a core member 31 formed of a magnetic material and a coil 12 (see FIG. 4B) wound around the core member 31 are accommodated in a housing C. Similarly to the core member 11, the core member 31 is a rectangular parallelepiped member made of a magnetic material such as ferrite, but the adjustment holes H are formed at a plurality of locations (three locations in the example shown in FIG. 4). The point is different from the core member 11.

  In the resonator 2 having such a configuration, one or a plurality of adjustment jigs 20 can be inserted into a plurality of adjustment holes H formed in the core member 31. That is, in this embodiment, the adjustment jig 20 is inserted into the adjustment hole H by the number corresponding to the adjustment amount of the resonance frequency of the resonator 2. Since the resonator 2 of the present embodiment can be inserted with one or a plurality of adjusting jigs 20, the adjustment range of the inductance is wider than that of the resonator 1 of the first embodiment.

  As described above, in the present embodiment, a plurality of adjustment holes H for adjusting the resonance frequency are formed in the core member 31 of the coil body 30, and the adjustment jig 20 formed of the magnetic body 21 and the nonmagnetic body 22 is provided. The resonance frequency is adjusted by being inserted into at least one adjustment hole H. As a result, the resonance frequency can be adjusted simply by inserting the adjustment jig 20 into the adjustment hole H, so that the resonance frequency can be easily adjusted in a short time.

[Third Embodiment]
FIGS. 5A and 5B are diagrams showing the main configuration of the coil unit included in the resonator according to the third embodiment of the present invention, where FIG. 5A is a front perspective view and FIG. 5B is a bottom perspective view. In FIG. 5A, the coil 12 is not shown in the same manner as in FIG. 4A in order to avoid complicating the drawing and facilitate understanding. In FIG. 5, the same members as those shown in FIGS. 1 and 4 are denoted by the same reference numerals.

  As shown in FIG. 5, the resonator 3 of the present embodiment includes a coil unit body 40 instead of the coil unit body 30 in FIG. 4, and can include adjustment jigs 20 a to 20 c having different lengths. It is. The coil part main body 40 has a configuration in which a core member 41 formed of a magnetic material and a coil 12 (see FIG. 5B) wound around the core member 41 are accommodated in a housing C. Similarly to the core member 31, the core member 41 is a rectangular parallelepiped member made of a magnetic material such as ferrite. The core member 31 is different from the core member 31 in that adjustment holes H1 to H3 having different depths are formed. Is different.

  FIG. 6 is a diagram showing a configuration of an adjustment jig in the third embodiment of the present invention. As shown in FIG. 6, the adjustment jigs 20 a to 20 c have a configuration in which a plate-like magnetic body 21 is stacked so as to be sandwiched between plate-like nonmagnetic bodies 22 and 22, similarly to the adjustment jig 20 shown in FIG. 3. There are different lengths. As shown in FIGS. 6A and 6B, a plurality of adjustment jigs 20a to 20c having the same length but different thicknesses of the magnetic body 21 are prepared.

  In the resonator 3 having such a configuration, the adjusting jigs 20a to 20c can be inserted into the adjusting holes H1 to H3 formed in the core member 41, respectively. That is, in the present embodiment, the adjustment jigs 20a to 20c having a length suitable for the depth are inserted into the adjustment holes H1 to H3. Since the resonator 3 of this embodiment can be inserted with adjusting jigs 20a to 20c having different lengths, the inductance can be adjusted more finely than the resonator 2 of the second embodiment.

  As described above, in the present embodiment, adjustment holes H1 to H3 having different depths are formed in the core member 41 of the coil portion main body 40, and the adjustment jig 20a has a length that matches the depth of the adjustment holes H1 to H3. .About.20c are inserted into the adjustment holes H1 to H3, respectively, to adjust the resonance frequency. Accordingly, the resonance frequency can be adjusted simply by inserting the adjustment jigs 20a to 20c into the adjustment holes H1 to H3. Therefore, the resonance frequency can be easily adjusted in a short time.

[Fourth Embodiment]
FIG. 7 is a diagram showing the configuration of the adjustment jig in the fourth embodiment of the present invention. As shown in FIG. 7, the adjustment jigs 50 a to 50 c in the present embodiment are formed by mixing a powdery magnetic material such as ferrite and a powdered nonmagnetic material such as an acrylic resin. And the ratio of nonmagnetic material are different from each other.

  Such adjustment jigs 50a to 50c have the same width and thickness (overall thickness T) as the adjustment jig 20 shown in FIG. For this reason, in the first and second embodiments, it is possible to adjust the resonance frequency using the adjustment jigs 50 a to 50 c instead of the adjustment jig 20. Further, by adjusting the length of each of the adjustment jigs 50a to 50c in the same manner as the adjustment jigs 20a to 20c shown in FIG. 6, in the third embodiment, the adjustment jigs are replaced with the adjustment jigs 20a to 20c. Tools 50a-50c can be used.

  Here, in this embodiment, after adjusting the resonance frequency, the ratio of the magnetic material and the non-magnetic material is set to a value suitable for the adjustment of the resonance frequency (the adjustment hole shown in FIGS. 2 and 4). It will be inserted into the hole H or the adjusting holes H1 to H3) shown in FIG. As described above, also in the present embodiment, as in the first to third embodiments described above, the adjustment jigs 50a to 50c are inserted into the adjustment holes H1 to H3, respectively, and the resonance frequency is adjusted. Accordingly, the resonance frequency can be adjusted simply by inserting the adjustment jigs 20a to 20c into the adjustment holes H1 to H3. Therefore, the resonance frequency can be easily adjusted in a short time.

[Fifth Embodiment]
FIGS. 8A and 8B are diagrams showing the main configuration of the coil section body in the fifth embodiment of the present invention, where FIG. 8A is a perspective perspective view and FIG. 8B is a bottom perspective view. FIG. 9 is a diagram showing the configuration of the adjustment jig in the fifth embodiment of the present invention. The coil body 20, 30, 40 described in the first to third embodiments described above includes the solenoid type coil 12. On the other hand, the coil part main body 60 in this embodiment is provided with the coil 62 wound spirally within the same plane.

  Specifically, the coil section body 60 includes a core member 61 formed of a magnetic material, and a coil 62 disposed close to one surface side (upper surface side in the example shown in FIG. 8) of the core member 61. It is the structure accommodated in. The core member 61 is a disk-shaped member made of a magnetic material such as ferrite. In the central portion of the core member 61, there is an adjustment hole H that is an inductance adjustment hole of the coil body 60 and into which the adjustment jig 70a (or the adjustment jigs 20 and 70b) shown in FIG. 9 is inserted. Is formed.

  As shown in FIG. 8B, the adjustment hole H is formed, for example, in a rectangular shape in cross section (plan view shape). Although details will be described later, a hole is formed in the center of the coil 62, and when the coil body 60 is viewed through, the coil 62 covers the adjustment hole H formed in the core member 61. It is made not to be broken. Here, when the cylindrical adjustment jig 70b shown in FIG. 9 is used, the adjustment hole H has a circular cross-sectional shape. That is, the cross-sectional shape of the adjustment hole H is formed in a shape corresponding to the cross-sectional shape of the adjustment jig (conversely, the cross-sectional shape of the adjustment jig is formed in a shape corresponding to the cross-sectional shape of the adjustment hole H. Can also be said).

  A notch into which the adjustment jig 70a (or the adjustment jigs 20 and 70b) is inserted is formed at the center of the upper surface of the housing C. Note that this notch may be formed in the center of the bottom surface of the housing C. The resonance frequency of the resonator according to the present embodiment is adjusted by adjusting the inductance of the coil body 60 by the adjustment jig 70a (or the adjustment jigs 20 and 70b).

  The coil 62 is a coil in which a conducting wire such as a round wire or a rectangular wire is spirally wound in the same plane, and is connected to a capacitor (not shown) that forms a resonance circuit together with the coil 62. In addition, the conducting wire is not wound around the central part of the coil 62, and it is a hole. That is, the coil 62 can be said to be an annular coil having an inner diameter that is approximately the same as the diameter of the adjusting jig 70a (or a slightly larger diameter).

  The coil 62 is disposed close to one surface side of the core member 61 (upper surface side in the example shown in FIG. 8) so that the winding surface of the conducting wire is parallel to the core member 61. The conductive wire forming the coil 62 is an insulating film-covered wire in which the surface of a metal wire such as copper (Cu) or silver (Ag) is covered with an insulating film, like the conductive wire forming the coil 12 described above. Note that the diameter and the number of turns of the conducting wire forming the coil 62 are appropriately set according to the inductance value to be realized.

  As shown in FIG. 9, the adjustment jig 70 a includes a square plate-like magnetic body 71 and a square columnar non-magnetic body 72, and one end of the non-magnetic body 72 (the bottom in the example shown in FIG. 9). A magnetic body 71 is provided to form a quadrangular prism as a whole. The adjustment jig 70 a is inserted entirely in the central portion of the coil body 60 so that the magnetic body 71 is disposed in the adjustment hole H formed in the core member 61 in order to adjust the inductance of the coil body 60. Is done. The adjustment jig 70a is housed in the casing C at the center of the coil body 60 after the inductance adjustment is completed, and the notch provided in the center of the upper surface of the casing C has the adjustment jig 70a. A lid member C1 for preventing the dropout is attached.

  The magnetic body 71 constituting the adjusting jig 70a is made of a magnetic material such as ferrite, and the nonmagnetic body 72 is made of a nonmagnetic material such as acrylic resin. Here, the adjustment jig 70a has the same outer shape body (that is, the same width, thickness, and length), but the magnetic bodies 71 have different thicknesses (in other words, the thickness of the magnetic body 71 is not the same as the thickness of the magnetic body 71). A plurality of magnetic materials 72 having different ratios to the length of the magnetic body 72 are prepared in advance.

  The adjustment jig 70b shown in FIG. 9 differs from the adjustment jig 70a only in the outer shape, and has the same basic structure. That is, the adjusting jig 70b includes a disk-shaped magnetic body 71 and a columnar non-magnetic body 72, and the magnetic body 71 is provided at one end (the bottom in the example shown in FIG. 9) of the non-magnetic body 72. Is provided to form a columnar shape as a whole. In the present embodiment, the adjustment jig 20 shown in FIG. 3 can be used.

  The adjustment of the resonance frequency of the resonator (inductance of the coil unit body 60) in this embodiment is performed by the same method as in the first embodiment, and thus detailed description thereof is omitted here. As described above, in the present embodiment, the adjustment hole 70 for adjusting the resonance frequency is formed in the core member 61 of the coil section body 60, and the adjustment jig 70 a (or the magnetic material 71 and the nonmagnetic material 72 is formed). The adjustment jigs 20, 70b) are inserted into the adjustment holes H to adjust the resonance frequency. Accordingly, the resonance frequency can be adjusted simply by inserting the adjustment jig 70a into the adjustment hole H, so that the resonance frequency can be easily adjusted in a short time.

  Although the resonator according to the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be freely changed within the scope of the present invention. For example, in the first to third embodiments, the case where the core members 11, 31, and 41 have a rectangular parallelepiped shape has been described as an example. However, the core members 11, 31, and 41 have a cylindrical shape or the like. Other shapes may be used. Further, the adjustment holes H, H1 to H3 and the adjustment jigs 20, 20a to 20c, and 50a to 50c are not limited to a rectangular shape in cross section, and may be other shapes such as a circular shape.

  In each of the above embodiments, a shield member may be provided inside or outside the casing of the coil body 20, 30, 40, 60 in order to improve efficiency. As this shield member, a member formed mainly of a metal having high conductivity such as aluminum (Al) or copper (Cu) can be used.

DESCRIPTION OF SYMBOLS 1-3 ... Resonator, 11 ... Core member, 12 ... Coil, 20 ... Adjustment jig, 20a-20c ... Adjustment jig, 21 ... Magnetic body, 22 ... Non-magnetic body, 31 ... Core member, 41 ... Core member , 61 ... Core member, 62 ... Coil, 50a-50c ... Adjustment jig, 70a, 70b ... Adjustment jig, 71 ... Magnetic body, 72 ... Non-magnetic body, C1 ... Lid member, H ... Adjustment hole, H1-H3 ... Adjustment hole

Claims (7)

In a resonator including a core member formed of a magnetic material and a wound coil,
An adjustment hole formed in the core member for adjusting the resonance frequency;
A resonator comprising: an adjustment jig that is formed of a magnetic material and a non-magnetic material, and is inserted into the adjustment hole to adjust the resonance frequency. A plurality of the adjustment holes are formed in the core member,
The resonator according to claim 1, wherein the adjustment jig is inserted into the adjustment hole by a number corresponding to the adjustment amount of the resonance frequency. The core member is formed with a plurality of adjustment holes having different depths,
The resonator according to claim 1, wherein an adjustment jig having a length suitable for a depth is inserted into the adjustment hole. The adjustment jig is composed of a plate-like magnetic body and a plate-like non-magnetic body laminated on the magnetic body to make the thickness of the adjustment jig suitable for the size of the adjustment hole,
The resonance according to any one of claims 1 to 3, wherein the adjustment jig having the magnetic body having a thickness suitable for adjusting the resonance frequency is inserted into the adjustment hole. vessel. The adjustment jig is a mixture of a magnetic material and a nonmagnetic material,
The adjustment jig in which the ratio of the magnetic material and the non-magnetic material is set to be suitable for the adjustment of the resonance frequency is inserted into the adjustment hole. Item 4. The resonator according to any one of items 3.   The resonator according to claim 1, further comprising a lid member that prevents the adjustment jig inserted into the adjustment hole from falling off.   The resonator according to any one of claims 1 to 6, further comprising a capacitor connected to the coil to form a resonance circuit together with the coil.

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