JP2009010190A - Inductor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inductor whose inductance is adjustable in a simple arrangement. <P>SOLUTION: A first frame 3 and a second frame 4 are respectively disposed on one end and the other end with regard to a winding axial direction of a flat type conductor coil 1 and a supporting axle 5 provided such that it internally extends through the coil 1 to the same direction as the winding axial direction is supported on the first and second frames 3 and 4. A first coil holding member 25 mechanically constraining a plurality of winding turns from the one end of the coil 1 and a second coil holding member 26 constraining a plurality of winding turns from the other end of the coil 1 are slidably supported on the supporting axle 5 and male screw rods 31 and 32 respectively rotationally supported on the frames 3 and 4 are engaged with female screw portions 25c and 26c respectively provided on the coil holding members 25 and 26. The rotation of the male screw rods 31 and 32 allows the coil holding members 25 and 26 to shift so as to extend or contract the coil 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an inductor capable of adjusting an inductance.

  When electric power is supplied from a high-frequency power source to a plasma load or the like, as disclosed in Patent Document 1, an impedance matching unit including an inductor and a capacitor is provided between the power source and the load. For example, as shown in FIG. 14, this type of impedance matching unit is composed of an inductor composed of coils L1 and L2 and capacitors C1 and C2, and an input terminal IN is connected to an output terminal of a high-frequency power source (not shown) for output. Terminal OUT is connected to the load. In this type of impedance matching device, a larger current flows through L2 than the inductor coil L1. As is well known, since a high frequency current flows on the surface of a conductor due to the skin effect, in order to flow a large high frequency current, it is necessary to form a coil using a conductor having a large surface area. For this reason, in the impedance matching unit shown in FIG. 14, a coil obtained by winding a rectangular conductor spirally around the winding axis is used as the coil L2.

  By the way, in this type of impedance matching device, it is preferable that not only the capacitor but also the inductor can be adjusted when impedance matching is achieved. As a method for adjusting the inductance of the inductor, as shown in Patent Document 2, a method is proposed in which a spiral coil is formed on a plane and a part of the coil is short-circuited through a short-circuit plate. .

  In addition, as disclosed in Patent Document 3, there is a type in which the inductance is adjusted by changing the coil pitch by expanding and contracting the coil without particularly constraining the entire coil.

Further, as shown in Patent Document 4, the coil is accommodated in a cylindrical case, and the inductance is adjusted by expanding and contracting while guiding the coil by the inner surface of the case. is there.
JP-A-06-11528 JP-A 06-96967 Japanese Utility Model Publication No. 60-11418 JP 08-264327 A

  In the case of the invention disclosed in Patent Document 2, it is necessary to configure the coil in a planar shape, but the planar coil is not practical because it requires a large space for installation. Further, in the method of short-circuiting a part of the coil, it is difficult to finely adjust the inductance.

  As shown in Patent Document 3, according to the method of expanding and contracting the coil, fine adjustment of the inductance is possible. However, if the entire coil is expanded and contracted without restraining the coil, the coil is expanded and contracted. In addition to the change in the coil pitch, the coil is also deformed in the radial direction. Therefore, if there is another part in the vicinity of the coil, the coil may come into contact with the other part. In particular, when the coil is installed with its winding center axis oriented in the horizontal direction, the coil bends due to gravity, so the amount of deformation in the radial direction of the coil (downward) increases, and adjacent parts The risk of contact with the As disclosed in Patent Document 4, if the coil is accommodated in the case and expanded and contracted while being guided by the case, the diameter of the coil can be prevented from being expanded beyond the inner diameter of the case. it can. However, when the coil is accommodated in the case, when the coil is contracted, each turn of the coil may be eccentric from the winding center axis of the coil, and the coil may contact the inner surface of the case. There is a risk that it will not be possible to smoothly expand and contract. Particularly in the case of a flat conductor coil, since the coil conductor has a corner, it becomes difficult to perform smooth expansion and contraction when the coil contacts the inner surface of the case. In order to smoothly expand and contract the coil, it is conceivable to configure the case loosely, but when the case is loosened, the case becomes large, so the inductor becomes large, It is not preferable. In addition, it is not preferable to accommodate a rectangular conductor coil having a large energizing current and a large amount of heat generation in the case because heat radiation from the coil is deteriorated.

  In particular, in the inductor having the coils L1 and L2 as shown in FIG. 14, when the coil L1 having a relatively small energization current is constituted by an enameled wire and the coil L2 through which a large amount of current flows is constituted by a flat conductor, In order to make the inductor compact, a structure in which the rectangular conductor coil L2 is concentrically arranged inside the coil L1 is adopted. In this case, if the rectangular conductor coil L2 arranged inside becomes large, The coil L1 is also large, and it is inevitable that the entire inductor becomes large.

  An object of the present invention is to smoothly adjust an inductance of an inductor having a flat conductor coil without using a case that causes an increase in size, and without causing the coil to expand and contract without contacting a nearby component. It is to be able to let you.

  The present invention is directed to an inductor including a rectangular conductor coil formed by winding a rectangular conductor along a winding axis that extends linearly.

  In the present invention, the first and second frames, which are respectively arranged on one end side and the other end side in the winding axis direction of the flat conductor coil and face each other with the flat conductor coil therebetween, and the inside of the flat conductor coil are wound. A support shaft provided so as to extend in the same direction as the rotation axis and having one end and the other end supported by the first frame and the second frame, respectively, and a rectangular conductor coil supported by the support shaft on the first frame side A first coil holding member that engages with each turn of the plurality of turns and mechanically constrains the plurality of turns of the flat conductor coil, and a flat conductor supported by a support shaft on the second frame side. A second coil holding member is provided that engages with each turn of the plurality of turns of the coil and mechanically restrains the plurality of turns of the rectangular conductor coil. Then, at least one of the first coil holding member and the second coil holding member is provided so as to be slidable along the support shaft, and the coil holding member is provided so as to be slidable along the support shaft. A position adjustment mechanism for adjusting the position along the rotation axis is provided.

  As described above, the axial direction position of one end side and / or the other end side of the coil is adjusted in a state where a plurality of turns on one end side and the other end side of the flat conductor coil are mechanically constrained. It is possible to adjust the inductance by expanding and contracting the unconstrained portion. When the coil is expanded and contracted to adjust the inductance, the constrained portions at both ends of the coil are hardly deformed both in the radial direction and in the axial direction. The unconstrained portion of the flat conductor coil is easily deformed in the axial direction, but hardly deformed in the radial direction. This is because the portions of the plurality of turns at both ends of the coil are constrained.

  As described above, according to the present invention, the coil holding member disposed inside the coil restrains a plurality of turns at both ends of the coil, and the coil is expanded and contracted while suppressing deformation in the radial direction of the coil. In order to adjust, it is not necessary to arrange | position guide means, such as a case which accommodates a coil, on the outer side of a coil. Therefore, the inductor structure can be prevented from becoming complicated, and the inductor can be miniaturized. Further, since a case for accommodating the coil is not provided, the rectangular conductor coil can be smoothly expanded and contracted, and the heat radiation from the coil can be improved.

  The number of turns of the coil restrained by the coil holding member on one end side and the other end side of the flat conductor coil (referred to as “restraint turn number”) is the radial direction (winding) of the coil generated when the flat conductor coil is expanded and contracted. Experiments were made so that the amount of deformation and deflection in the direction eccentric to the rotation axis was within the allowable range, and the amount of coil expansion and contraction required to adjust the inductance of the rectangular conductor coil by a predetermined amount was obtained. To be determined. The optimum value of the number of constrained turns varies depending on the material, number of turns, length, etc. of the rectangular conductor coil.

  In a preferred aspect of the present invention, the first and second coil holding members have a plurality of end portions facing the inner peripheral portion of the flat rectangular conductor coil at intervals in the circumferential direction of the flat rectangular conductor coil. 2 at each end of the coil holding member facing the inner peripheral portion of the rectangular conductor coil, each turn of the plurality of turns on the one end side in the winding axis direction of the rectangular conductor coil and each of the plurality of turn portions on the other end side. A groove for fitting each turn is formed. Then, each turn of a plurality of turns on one end side in the winding axis direction of the flat conductor coil is fitted into a groove in each end portion of the first coil holding member, and the other in the winding axis direction of the flat conductor coil. A plurality of turns on one end side and a plurality of turns on the other end side of the rectangular conductor coil are obtained by fitting each turn of the plurality of end turn portions into a groove on each end portion of the second coil holding member. This part is mechanically restrained.

  When the groove is provided in the coil holding member as described above and each turn of the multiple turn portions on one end side and the other end side of the rectangular conductor coil is fitted in the groove, one end side and the other of the rectangular conductor coil It is possible to easily restrain the plurality of turns on the end side.

  In another preferred aspect of the present invention, the first coil holding member and the second coil holding member are constituted by a cylindrical insulating member, and the outer circumferences of the first coil holding member and the second coil holding member. And a plurality of turns on one end side and the other end side of the rectangular conductor coil are fitted into the spiral grooves on the outer circumferences of the first coil holding member and the second coil holding member, respectively. As a result, the portions of the plurality of turns on one end side and the other end side of the rectangular conductor coil are restrained.

  If comprised as mentioned above, the part of the multiple turns of the one end side and other end side of a flat conductor coil can be restrained more firmly.

  The position adjustment mechanism is provided on the side of the coil holding member whose position is adjusted and the screw rod rotatably supported by the frame on the coil holding member side whose position is to be adjusted, of the first and second frames. And a female screw portion screwed onto the screw rod.

  When the position adjusting mechanism is configured as described above, the support shaft is preferably provided in a state in which the axis is aligned with the winding center axis of the flat conductor coil. In this case, the screw rod and the female screw portion are provided at positions eccentric from the winding center axis of the flat conductor coil.

  Further, when the position adjusting mechanism is constituted by the screw rod and the female screw portion as described above, the support shaft is provided at a position eccentric from the winding center axis of the flat conductor coil, and the screw rod and the female screw portion are connected to the flat conductor coil. You may make it provide in the state which made the axis line correspond to the winding center axis line.

  Further, when the position adjusting mechanism is constituted by the screw rod and the female screw portion as described above, a plurality of support shafts are provided, and the plurality of support shafts are positioned symmetrically with respect to the winding center axis of the rectangular conductor coil. You may make it arrange | position to.

  As described above, when the screw rod and the female screw portion are provided in a state where the axis is aligned with the winding center axis of the flat conductor coil, when the screw rod is rotated, the screw rod and the female screw portion are inclined in the direction inclined with respect to the axial direction. Since the driving force does not act on the coil holding member, the coil holding member can be displaced in a well-balanced manner so that the inductance can be adjusted smoothly.

  In the present invention, the coil holding member can also be provided on only one side of the first frame and the second frame. That is, an inductor according to the present invention includes first and second frames disposed on one end side and the other end side in the winding axis direction of a flat conductor coil and facing each other with the flat conductor coil therebetween, and a flat conductor coil. A support shaft that is provided so as to extend in the same direction as the winding axis and has one end and the other end supported by the first frame and the second frame, respectively, and the first frame and the second frame. One side of which is supported by a support shaft and engages with each turn of the multi-turn portion of the flat conductor coil to mechanically connect the multi-turn portion of the flat conductor coil (near one frame). It can also be set as the structure provided with the coil holding member to restrain. In this case, the end of the rectangular conductor coil located on the other side of the first frame and the second frame is fixed to the other of the first frame and the second frame. The coil holding member is provided so as to be slidable along the support shaft, and a position adjusting mechanism is provided for adjusting the position of the coil holding member along the winding axis direction.

  Even when the coil conductor holding member that restrains the multiple turn portion of the coil is provided only in the portion near one end of the flat conductor coil as described above, the number of restraining turns is sufficiently large. By doing this (the axial dimension of the coil holding member is made sufficiently large), the inductance can be adjusted by expanding and contracting the coil while suppressing deformation of the rectangular conductor coil in the radial direction.

  When only one coil holding member is provided as described above, the coil holding member has a plurality of end portions facing the inner peripheral portion of the flat conductor coil with a space in the circumferential direction of the flat conductor coil, What formed the groove | channel for fitting each turn of the part of several turns of a conductor coil in each edge part which faces the inner peripheral part of a flat conductor coil can be used. In this case, the plurality of turns of the flat conductor coil are mechanically constrained by fitting the turns of the plurality of turns of the flat conductor coil into the grooves at the ends of the coil holding member.

  Further, as the coil holding member, a cylindrical insulating member formed with a spiral groove on the outer periphery is used, and a plurality of turns of the flat conductor coil are fitted into the spiral groove on the outer periphery of the coil holding member. Thus, a plurality of turns of the rectangular conductor coil may be constrained.

  The position adjustment mechanism includes a screw rod that is rotatably supported by one of the first and second frames, and a female screw portion that is provided on the coil holding member side and is screwed to the screw rod. It can be.

  In a preferred aspect of the present invention, an outer coil disposed concentrically with the rectangular conductor coil is further provided outside the rectangular conductor coil.

  When the outer coil is provided as described above, at least four coil conductor support members are disposed so as to surround the rectangular conductor coil from the periphery, and one end and the other end are supported by the first frame and the second frame. It is preferable to wind the outer coil in a state where the coil conductor is inserted into the coil conductor insertion groove provided in these coil conductor support members.

  According to the present invention, there is no need to accommodate the rectangular conductor coil in the case. Therefore, when a coil is further provided outside the rectangular conductor coil as described above, the distance between the rectangular conductor coil and the outer coil is increased. Without increasing the length, the rectangular conductor coil can be expanded and contracted to adjust its inductance. Therefore, it is possible to obtain an inductor capable of adjusting the inductance without causing an increase in size of the inductor.

  As described above, according to the present invention, the axial position of the coil holding member is adjusted in a state where at least a plurality of turns near one end of the rectangular conductor coil are mechanically restrained by the coil holding member. As a result, the inductance is adjusted by expanding and contracting the coil, so that the inductance can be adjusted by expanding and contracting the coil while suppressing deformation in the radial direction of the coil, and the case for accommodating the coil can be omitted. it can. Therefore, according to the present invention, the rectangular conductor coil can be smoothly expanded and contracted, and the heat radiation from the coil can be improved. Further, since no case is provided, it is possible to prevent the inductor structure from becoming complicated and to reduce the size of the inductor.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic diagram schematically showing the arrangement of coils in an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a flat conductor wound spirally along a linearly extending winding axis. The rectangular conductor coil 2 is an outer coil disposed concentrically outside the rectangular conductor coil 1. Reference numerals 3 and 4 denote plate-like first and second frames which are respectively arranged on one end side and the other end side in the winding axis direction of the flat rectangular conductor coil 1 and face each other with the flat rectangular conductor coil 1 therebetween. Is a support shaft (center conductor) provided inside the flat conductor coil 1 so as to extend in the same direction as the winding axis, and having one end and the other end supported by the first frame and the second frame, respectively.

  The first frames 3 and 4 are made of an insulating material, and an input terminal (IN) 6 attached to the first frame 3 is connected to one end 2 a of the outer coil 2. The other end 2 b of the outer coil 2 is connected to a relay terminal 7 attached to the second frame 4, and the relay terminal 7 is connected to a support shaft (center conductor) through a connection conductor 8 provided outside the second frame 4. 5 is connected to the end of the second frame 4 side. The end of the support shaft 5 on the first frame 3 side is connected to one end 1 a of the flat conductor coil 1 through a connection conductor 9 provided inside the first frame 3. The other end 1 b of the rectangular conductor coil 1 is connected to an output terminal (OUT) 11 attached to the second frame 4 through the connection conductor 10.

  As will be described later, in this embodiment, a coil holding member that supports a plurality of turns on one end 1a side and a plurality of turns on the other end 1b side of the flat conductor coil 1 on the support shaft 5 in the winding axis direction. In a state where the coil holding member is restrained, the rectangular conductor coil 1 is expanded and contracted in the axial direction by displacing the coil holding member in the axial direction of the coil, and the inductance of the rectangular conductor coil 1 is adjusted.

  2 to 11, the configuration of the embodiment of the present invention is shown in detail. 2 is a front view showing the configuration of the outer coil of the inductor according to the embodiment of the present invention, FIG. 3 is a front view showing a state where the outer coil of the embodiment is removed, and FIG. 4 is a right side view of FIG. 5 is a right side view of FIG. 2 with the first frame removed, FIG. 6 is a left side view of FIG. 2, and FIG. 7 is a left side view of FIG. 2 with the second frame removed. It is. 8 is a longitudinal sectional view of the vicinity of the first frame, FIG. 9 is a longitudinal sectional view of the vicinity of the second frame, and FIGS. 10 and 11 are right side views showing the outer surfaces of the first frame and the second frame, respectively. It is a figure and a left view.

  The first frame 3 and the second frame 4 are formed in a rectangular plate shape by an insulating material such as an insulating resin, and are arranged so as to face the coil winding axis OO direction. As shown in FIGS. 2 and 4 to 7, coil conductor support members 15 made of four insulating materials extending in the coil winding axis direction are arranged at the four corners of the frames 3 and 4, respectively. . Each coil conductor support member 15 is a member having a large number of rib plate portions 15a1, 15a2,..., 15an arranged at regular intervals in the coil winding axis direction. A coil conductor insertion groove 15b is formed between the portions.

  In the illustrated coil conductor support member 15, the thickness of the end plate portion 15a1 on one end side is set to be the thickest, and the thickness of the end plate portion 15an on the other end side is slightly thinner than the thickness of the end plate portion 15a1 on one end side. In addition, it is set to be thicker than the thicknesses of the other platen portions 15a2, 15a3,..., 15an-1. The other platen portions 15a2, 15a3, ..., 15an-1 are all set equal in thickness. Each coil conductor support member 15 is fastened to the frames 3 and 4 by screws 16 that pass through the frames 3 and 4 and are screwed into the coil conductor support members 15.

  In the illustrated example, comb-shaped coil conductor guide members 18 and 18 extending in the coil winding axis direction so as to connect between the substantially middle portions of the upper and lower long sides of the frames 3 and 4 (FIG. 8, These coil conductor guide members are fastened to the frames 3 and 4 with screws 19. As shown in FIGS. 8 and 9, the coil conductor guide member 18 is provided with a large number of coil conductor insertion grooves 18b arranged in the coil winding axis direction. Then, the coil conductors are wound spirally while sequentially inserting the coil conductors 20 made of enameled wires into the coil conductor insertion grooves 15b of the four coil conductor support members 15 and the coil conductor insertion grooves 18b of the coil conductor guide member 18. Thus, the outer coil 2 is configured.

  One end (winding start side end) of the outer coil 2 is connected to the input terminal 6 attached to the first frame 3, and the other end (winding end side end) is connected to the second frame 4. 7 is connected. In this embodiment, both the input terminal 6 and the relay terminal 7 are made of screws.

  The flat conductor coil 1 is formed by winding a flat conductor (a strip-shaped conductor) spirally along the winding axis in a state where the wide plate surface is substantially directed in the coil winding axis OO direction. It consists of things. If the rectangular conductor coil is wound in this way, the interval between turns can be widened, so that the amount of expansion and contraction when adjusting the inductance can be increased.

  A support shaft 5 that linearly extends between the frames 3 and 4 along the coil winding axis OO is disposed inside the rectangular conductor coil. In the present embodiment, the support shaft 5 is made of a highly conductive material such as copper, and the support shaft 5 also serves as a connection conductor that connects the flat conductor coil 1 and the outer coil 2 in series.

  Small diameter portions 5a and 5b are provided at both ends of the support shaft 5, and male screws are engraved on these small diameter portions. Nuts 22 and 23 are screwed into the threaded portions of the small diameter portions 5a and 5b of the support shaft 5 penetrating the frames 3 and 4 respectively, and by tightening these nuts 22 and 23, one end of the support shaft 5 and others The ends are fastened to the frames 3 and 4, respectively.

  The rectangular conductor coil 1 is supported by a support shaft 5 on the inner side of the end portion on the one end side (first frame 3 side) and on the inner side of the other end side (second frame 4 side). A first coil holding member 25 and a second coil holding member 26 are arranged. The first coil holding member 25 used in the present embodiment is made of a thick rectangular plate-like member made of an insulating material, and the support shaft 5 is fitted into a hole 25a provided at the center thereof. Thus, the support shaft 5 is slidably supported. Similarly, the second coil holding member 26 is also formed of a rectangular plate member made of an insulating material. By fitting the support shaft 5 into the hole 26a provided at the center thereof, the second coil holding member 26 is attached to the support shaft 5. It is slidably supported.

  The first coil holding member 25 is engaged with each turn of a plurality of turns from one end side of the flat conductor coil 1 on the first frame 3 side from the inside (with some mechanical coupling relationship). It is provided to mechanically constrain a portion of the plurality of turns on one end side of the coil 1. Further, the second coil holding member 26 is engaged with each turn of the plurality of turns from the other end side of the flat rectangular conductor coil 1 on the second frame 4 side, and has a plurality of turns on the other end side of the flat rectangular conductor coil. It is provided to mechanically restrain the part.

  In the present embodiment, as shown in FIG. 8, the first coil holding member 25 has end portions 25e1 and 25e2 facing the inner peripheral portion of the flat conductor coil 1 at both ends thereof, and at these end portions, A groove 25b is formed for fitting each turn of a portion of a plurality of turns (about 3 turns in the illustrated example) on one end side of the flat conductor coil 1 in the winding axis direction. As shown in FIG. 9, the second coil holding member 26 has end portions 26 e 1 and 26 e 2 facing the inner peripheral portion of the flat conductor coil 1 at both ends, and the flat conductor coil 1 is provided at these end portions. A groove 26b is formed for fitting each turn of a plurality of turns (about 3 turns in the illustrated example) on the other end side in the winding axis direction. Then, the turns of the plurality of turns on one end side in the winding axis direction of the flat conductor coil 1 are fitted in the grooves 25b at the end portions of the first coil holding member 25, and the winding of the flat conductor coil 1 is performed. The turns of the plurality of turns on the other end side in the axial direction are fitted into the grooves 26b at the ends of the second coil holding member 26, whereby the plurality of turns on the one end side of the rectangular conductor coil 1 And the part of the multiple turns on the other end side is mechanically restrained.

8 and 9 show an example in which the first coil holding member 25 and the second coil holding member 26 mechanically constrain a portion of a plurality of turns from the end of the flat conductor coil 1. However, the present invention is not limited to this, and the first coil holding member 25 and the second coil portion are arranged from a portion (for example, the second turn) which is not the turn at the end of the flat conductor coil. The coil holding member 26 may be mechanically restrained.

  One end of a screw rod 31 extending in a direction parallel to the coil winding axis direction is rotatably supported on the first frame 3, and a screw portion 31 a of the screw rod 31 extends along the coil winding axis direction. Screwed into a female screw portion 25c (see FIG. 8) provided in the first coil holding member 25. Similarly, one end of a screw rod 32 extending in a direction parallel to the coil winding axis direction is rotatably supported on the second frame 4, and a screw portion 32 a of the screw rod 32 extends along the coil winding axis direction. Then, it is screwed into a female screw portion 26c (see FIG. 9) provided in the second coil holding member 26. Knobs 31b and 32b are provided at the ends of the screw rods 31 and 32 located outside the frames 3 and 4, respectively. By rotating these screw rods 31 and 32 with these knobs, the coil holding member 25 is provided. And 26 are displaced in the coil winding axis direction so that the positions of the coil holding members 25 and 26 can be adjusted.

  In the present embodiment, the screw rod 31 and the female screw portion 25c constitute a position adjusting mechanism 33 that adjusts the position of the coil holding member 25 along the coil winding axis direction, and the screw rod 32 and the female screw portion 26c. Thus, a position adjusting mechanism 34 that adjusts the position of the coil holding member 26 along the coil winding axis is configured. In order to regulate the movement range of the coil holding members 25 and 26, the coil conductor holding members abut against the coil conductor holding members 25 and 26 when the coil conductor holding members are displaced to a limit position separated from the frames 3 and 4 by a certain distance. Stoppers 45 and 46 that prevent displacement of the coil conductor holding members 25 and 26 are attached to the support shaft 5.

  One end 1a of the flat conductor coil 1 is connected to a terminal plate 37 attached to one end of a flexible connecting conductor 9 by a screw 38. The other end of the connection conductor 9 is connected to a terminal plate 39 connected to the support shaft 5.

  The other end 1b of the flat conductor coil 1 is connected to a terminal plate 41 attached to one end of a flexible connecting conductor 10 by a screw 42. The other end of the connection conductor 10 is connected to an output terminal 11 attached to the frame 4.

  In this embodiment, the input terminal 6 is connected to one end of the outer coil 2, and the other end of the outer coil 2 passes through the relay terminal 7, the connection conductor 8, the support shaft (center conductor) 5, and the connection conductor 9. Is connected to one end 1a. The other end 1 b of the flat conductor coil 1 is connected to the output terminal 11 through the connection conductor 10.

  In the inductor of this embodiment, when adjusting the inductance, at least one of the screw rods 31 and 32 of the position adjusting mechanisms 33 and 34 is rotated to change the positions of the coil holding members 25 and 26. Since the flat conductor coil 1 has a plurality of turns at one end and a plurality of turns at the other end constrained by the coil holding members 25 and 26, the coil holding members 25 and 26 are moved by the position adjusting mechanisms 33 and 34. Is adjusted, the unconstrained portion of the rectangular conductor coil 1 expands and contracts, and its inductance is adjusted.

  As described above, when the axial direction positions of the one end side and the other end side of the coil are changed in a state where the plurality of turns on the one end side and the other end side of the flat conductor coil 1 are mechanically constrained, The unconstrained portion is easily deformed in the axial direction, but is not easily deformed in the radial direction (direction eccentric with respect to the winding center axis). As the number of constraining turns on the one end side and the other end side of the coil 1 is larger, the deformation of the coil in the radial direction is suppressed. When the winding center axis of the rectangular conductor coil 1 is installed in the horizontal direction, the coil 1 bends due to gravity. However, if a plurality of turns of the coil are constrained at both ends of the coil 1, The amount of deflection due to the gravity of the coil 1 can also be reduced. Therefore, by appropriately setting the number of constraining turns on one end side and the other end side of the coil 1, the amount of deformation and deflection in the radial direction of the coil when the coil 1 is expanded and contracted is set to a slight range. Can be suppressed.

  As described above, according to the present invention, the inductance can be adjusted by expanding and contracting the coil while suppressing deformation of the coil, so that the coil contacts the outer coil 2 when the rectangular conductor coil 1 is expanded and contracted. In order to prevent this, both the coils can be arranged close to each other without arranging a case for housing the flat conductor coil 1 between the coils. Therefore, the inductor structure can be prevented from becoming complicated, and the inductor can be miniaturized. Further, the flat conductor coil can be smoothly expanded and contracted, and the heat radiation from the coil can be improved.

  In the above embodiment, one support shaft 5 is arranged along the winding center axis OO of the flat conductor coil 1, but the support shaft is eccentric from the winding center axis of the flat conductor coil 1. The screw rods 31 and 32 and the female screw portions 25c and 26c into which these screw rods are screwed are provided in a state where the axis coincides with the winding center axis OO of the flat conductor coil 1. Also good. In the case of such a configuration, it is preferable to provide a plurality of support shafts and arrange the plurality of support shafts at positions symmetrical to the winding center axis of the flat conductor coil.

  For example, as shown in FIG. 12, the screw rods 31 and 32 and the female screw portions 25c and 26c into which these screw rods are screwed are aligned with the winding center axis OO of the rectangular conductor coil 1. It is preferable that the two support shafts 5A and 5B are arranged at positions symmetrical with respect to the winding center axis OO of the flat conductor coil. In this case, the rectangular conductor coil 1 and the outer coil 2 are connected in series through one of the support shafts, for example, the support shaft 5A.

  As shown in FIG. 12, when the screw rods 31 and 32 and the female screw portions 25 c and 26 c are provided with their respective central axes aligned with the winding central axis of the flat conductor coil 1, the screw rods 31 and 32 are rotated. In this case, since the driving force in the direction inclined with respect to the axial direction does not act on the coil holding members 25 and 26, the coil holding members 25 and 26 are displaced in a well-balanced manner to smoothly adjust the inductance. Can be made.

  In order to support the coil holding members 25 and 26 in a well-balanced manner, the two support shafts 5A and 5B are preferably arranged at positions symmetrical to the winding center axis OO of the flat conductor coil. Of the shafts 5A and 5B, the support shaft 5B other than the support shaft (support shaft 5A in the illustrated example) used for electrically connecting the flat conductor coil 1 and the outer coil 2 in series can be omitted.

  In the above embodiment, the coil holding members 25 and 26 are formed in a rectangular plate shape. However, the first and second coil holding members have a plurality of ends facing the inner peripheral portion of the flat rectangular conductor coil 1 with a rectangular conductive coil. At one end of the rectangular conductor coil in the winding axis direction at each end of the first and second coil holding members facing the inner periphery of the rectangular conductor coil 1. As long as it has a groove for fitting each turn of the plurality of turns and each turn of the plurality of turns on the other end side, the shape of the coil holding member is not limited to that used in the above embodiment. . For example, as shown in FIG. 13, three arm portions 25f1 to 25f3 are projected radially from the outer peripheral portion of a boss portion 25d having a hole 25a penetrating the support shaft 5 at the center, and the tip ends of the arm portions 25f1 to 25f3. The portions 25e1 to 25e3 may be formed with grooves 25b1 to 25b3 into which the turns of the coil 1 are fitted. The other coil holding members 26 can be similarly configured. The plurality of end portions 25e1 to 25e3 facing the inner peripheral portion of the flat conductor coil 1 of each coil holding member are preferably provided at equal angular intervals as shown in FIG. 13, but are not necessarily limited thereto. It is not something.

  Further, the first coil holding member 25 and the second coil holding member 26 are constituted by columnar insulating members, and spiral grooves are formed on the outer circumferences of the first coil holding member and the second coil holding member. By fitting the portions of the plurality of turns on the one end side and the other end side of the rectangular conductor coil 1 into the spiral grooves on the outer periphery of the first coil holding member 25 and the second coil holding member 26, respectively. You may make it restrain the part of the multiple turns of the one end side of the flat conductor coil 1, and the other end side.

  As the position adjustment mechanism for adjusting the positions of the first coil holding member 25 and the second coil holding member 26, as shown in the above embodiment, a screw rod and a female screw portion into which the screw rod is screwed, However, the structure of the screwing mechanism is not limited to that described above. For example, a screwing mechanism in which screw rods fixed to the coil holding members 25 and 26 are screwed onto nuts rotatably supported on the frames 3 and 4 and the screw rods are linearly displaced by rotating the nuts. Can also be used.

  In the above embodiment, the positions of both the first coil holding member 25 and the second coil holding member 26 are adjusted. However, in the present invention, the first coil holding member 25 and the second coil are adjusted. At least one of the holding members 26 is provided so as to be slidable along the support shaft 5, and the position along the axial direction of the support shaft 5 of the coil holding member provided so as to be slidable along the support shaft is adjusted. A position adjustment mechanism may be provided as described above. Therefore, in the above embodiment, one of the coil holding members 25 and 26 may be fixed to the support shaft, and the position adjusting mechanism may be provided only for the other coil holding member.

  In the inductor according to the present invention, each portion of the rectangular conductor coil 1 is prevented from being short-circuited by the coil holding members 25 and 26 and from being electrically shocked by the operator through the screw rods 31 and 32 of the position adjusting mechanism. Of course, it is necessary to select the material. For example, in the above description, the coil holding members 25 and 26 are entirely made of an insulating material. However, in order to prevent a short circuit between the turns of the flat conductor coil, at least the flat conductor coil of the coil holding members 25 and 26 is used. The part engaged with 1 should just consist of an insulating material. However, when a portion other than the portion that engages with the flat conductor coil 1 of the coil holding members 25 and 26 is made of metal, the operator is prevented from receiving an electric shock through the screw rods 31 and 32 of the position adjusting mechanism. Therefore, for example, the screw rods 31 and 32 need to be formed of an insulating material, and the knobs 31b and 32b must be formed of an insulating material.

  In the above embodiment, the female screw portions 25c and 26c for screwing the screw rods 31 and 32 are illustrated as being directly engraved in the coil holding members 25 and 26, but the female screw portions 25c and 26c are illustrated. May be provided on a metal member inserted into the coil holding members 25, 26. Similarly, a boss member having a hole through which the support shaft 5 is slidable can be inserted into the coil holding members 25 and 26.

  As shown in the above embodiment, the outer coil 2 is arranged so as to surround the rectangular conductor coil from the periphery, and at least four of which one end and the other end are supported by the first frame 3 and the second frame 4. The coil conductor support member 15 is preferably wound in a state where the coil conductor is inserted into the coil conductor insertion groove, but the way of providing the outer coil is not limited to the above example. For example, the outer coil 2 may be wound around a bobbin provided so as to surround the flat conductor coil 1.

  The position adjustment mechanisms 33 and 34 for adjusting the positions of the first coil holding member 25 and the second coil holding member 26 may be operated manually or may be operated using a motor.

  In the above embodiment, the first coil holding member 25 and the second coil holding member 26 are provided on the first frame 3 side and the second frame 4 side, respectively, and the rectangular conductor coil is formed by these coil holding members. The plurality of turns on the one end side and the plurality of turns on the other end side are restrained, but the coil holding member 25 is provided only on the first frame 3 side, and the coil is held only on one of the frame sides. A member may be provided. In this case, the first and second frames disposed on one end side and the other end side in the winding axis direction of the flat conductor coil 1 and facing each other with the flat conductor coil in between, and the inner side of the flat conductor coil. A support shaft provided so as to extend in the same direction as the winding axis and having one end and the other end supported by the first frame and the second frame, respectively, and one of the first frame and the second frame And a coil holding member that is supported by the support shaft and engages with each turn of the plurality of turns of the flat conductor coil and mechanically restrains the plurality of turns of the flat conductor coil. And the edge part of the flat conductor coil located in the other side of the 1st frame and the 2nd frame is fixed to the other of the 1st frame and the 2nd frame, and the coil holding member is , Provided to be slidable along the support shaft.

  For example, in FIG. 3, the coil holding member 26 is omitted, the end 1b of the flat rectangular conductor coil 1 is fixed to the frame 4, and the coil holding member 25 is displaced in the winding axis direction by the position adjusting mechanism. In this case, the length in the axial direction of the coil holding member 25 is made sufficiently long so that the number of turns restrained by the coil holding member is sufficiently increased.

  In the above embodiment, the outer coil 2 is disposed outside the rectangular conductor coil 1, but it goes without saying that the present invention can also be applied when no outer coil is provided.

It is the schematic diagram which showed schematically the arrangement | positioning relationship of the coil in one Embodiment of this invention. It is the front view which showed the structure of the outer side coil of the inductor concerning embodiment of this invention. It is the front view which showed the state which removed the outer side coil of the embodiment. FIG. 3 is a right side view of FIG. 2. FIG. 3 is a right side view of FIG. 2 with the first frame removed. FIG. 3 is a left side view of FIG. 2. FIG. 3 is a left side view of FIG. 2 with a second frame removed. It is a longitudinal cross-sectional view near the 1st flame | frame of this embodiment. It is a longitudinal section near the 2nd frame of this embodiment. It is the right view which showed the outer surface of the 1st flame | frame used by this embodiment. It is the left view which showed the outer surface of the 2nd flame | frame used by this embodiment. It is the front view which showed the principal part of other embodiment of this invention. It is the front view which showed the modification of the coil holding member which can be used by this invention. It is the circuit diagram which showed the usage example of the inductor concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flat conductor coil 2 Outer coil 3 1st frame 4 2nd frame 5 Support shaft 25 1st coil holding member 25c Female thread part 26 2nd coil holding member 26c Female thread part 31, 32 Screw rod

Claims (13)

In an inductor including a flat conductor coil formed by winding a flat conductor along a winding axis extending linearly,
First and second frames disposed on one end side and the other end side in the winding axis direction of the flat conductor coil and facing each other with the flat conductor coil interposed therebetween, and the inside of the flat conductor coil is wound on the inside A support shaft provided to extend in the same direction as the axis and having one end and the other end supported by the first frame and the second frame, respectively, and the support shaft supported by the support shaft on the first frame side; A first coil holding member that engages with each turn of the plurality of turns of the flat conductor coil and mechanically constrains the plurality of turns of the flat conductor coil; and the support shaft on the second frame side. A second coil holding member that is supported and engages each turn of the plurality of turns of the rectangular conductor coil to mechanically restrain the plurality of turns of the rectangular conductor coil;
At least one of the first coil holding member and the second coil holding member is provided so as to be slidable along the support shaft,
A position adjusting mechanism for adjusting a position along the winding axis direction of the coil holding member provided so as to be slidable along the support shaft;
An inductor characterized by. The first and second coil holding members have a plurality of end portions facing the inner peripheral portion of the flat conductor coil, spaced in the circumferential direction of the flat conductor coil,
Each end of each of the first and second coil holding members facing the inner peripheral portion of the rectangular conductor coil has a plurality of turns and other portions of a plurality of turns on one end side in the winding axis direction of the rectangular conductor coil. A groove for fitting each turn of the plurality of turn parts on the end side is formed,
Each turn of a plurality of turns on one end side in the winding axis direction of the rectangular conductor coil is fitted into a groove in each end portion of the first coil holding member, and the winding axis direction of the rectangular conductor coil is The turns of the plurality of turns on the other end side are fitted into the grooves on the ends of the second coil holding member, so that the plurality of turns on the one end side of the rectangular conductor coil and the other end side The inductor according to claim 1, wherein the plurality of turns are mechanically constrained. The first coil holding member and the second coil holding member are constituted by a cylindrical insulating member, and a spiral groove is formed on the outer periphery of the first coil holding member and the second coil holding member. And
A plurality of turns on one end side and the other end side of the rectangular conductor coil are fitted into spiral grooves on the outer circumferences of the first coil holding member and the second coil holding member, respectively. The inductor according to claim 1, wherein a plurality of turns on one end side and the other end side of the coil are constrained.   The position adjusting mechanism includes a screw rod rotatably supported by a frame on the coil holding member side to be adjusted among the first and second frames, and a coil holding member side on which the position adjustment is performed. 4. The inductor according to claim 1, further comprising a female screw portion that is provided and screwed into the screw rod.   The support shaft is provided in a state where the axis coincides with the winding center axis of the flat conductor coil, and the screw rod and the female screw portion are provided at positions eccentric from the winding center axis of the flat conductor coil. The inductor according to claim 4. The support shaft is provided at a position eccentric from the winding center axis of the rectangular conductor coil,
5. The inductor according to claim 4, wherein the screw rod and the female screw portion are provided in a state in which the axis coincides with a winding center axis of the rectangular conductor coil.   The inductor according to claim 6, wherein a plurality of the support shafts are provided, and the plurality of support shafts are arranged symmetrically with respect to a winding center axis of the flat conductor coil. In an inductor including a flat conductor coil formed by winding a flat conductor along a winding axis extending linearly,
First and second frames disposed on one end side and the other end side in the winding axis direction of the flat conductor coil and facing each other with the flat conductor coil interposed therebetween, and the inside of the flat conductor coil is wound on the inside A support shaft provided so as to extend in the same direction as the axis and having one end and the other end supported by the first frame and the second frame, respectively, and one of the first frame and the second frame A coil holding member that is supported by the support shaft on the side and engages with each turn of the plurality of turns of the rectangular conductor coil to mechanically restrain the plurality of turns of the rectangular conductor coil;
An end of the rectangular conductor coil located on the other side of the first frame and the second frame is fixed to the other of the first frame and the second frame;
The coil holding member is provided so as to be slidable along the support shaft,
A position adjusting mechanism for adjusting the position of the coil holding member along the winding axis direction;
An inductor characterized by. The coil holding member has a plurality of ends facing the inner peripheral portion of the rectangular conductor coil at intervals in the circumferential direction of the rectangular conductor coil;
A groove for fitting each turn of a plurality of turns of the rectangular conductor coil is formed at each end facing the inner peripheral portion of the rectangular conductor coil of each of the coil holding members,
The plurality of turns of the rectangular conductor coil are mechanically constrained by fitting each turn of the plurality of turns of the rectangular conductor coil into a groove at each end of the coil holding member. The inductor according to claim 8. The coil holding member is composed of a cylindrical insulating member, and a spiral groove is formed on the outer periphery of the coil holding member,
The portion of the plurality of turns of the rectangular conductor coil is constrained by fitting the portion of the plurality of turns of the rectangular conductor coil into a spiral groove on the outer periphery of the coil holding member. Inductor.   The position adjustment mechanism includes a screw rod rotatably supported on one of the first and second frames, and a female screw portion provided on the coil holding member side and screwed to the screw rod. The inductor according to claim 8, 9 or 10.   The inductor according to any one of claims 1 to 11, further comprising an outer coil disposed concentrically with the rectangular conductor coil outside the rectangular conductor coil. There are provided at least four coil conductor support members disposed so as to surround the flat conductor coil from the periphery, and having one end and the other end supported by the first frame and the second frame,
The inductor according to claim 12, wherein the outer coil is wound in a state where a coil conductor is inserted into a coil conductor insertion groove of the coil conductor support member.

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