Choke coil, coil case, and coil

Abstract

To provide a choke coil in which a position of a coil portion of a choke coil using two or more turns of coil can be reliably fixed.SOLUTION: A choke coil includes: a plurality of cases 41 and 42 each having a first slit 61 having a first plane 11 and a second slit 62 having a second plane 12 parallel to the first plane 11; a first one-turn coil 31 that is inserted into the first slit 61 and has a shape in which a first band-shaped conductor is formed one turn; a second one-turn coil 32 that is inserted into the second slit 62 and electrically connected to the first one-turn coil 31 and has a shape in which a second strip-shaped conductor is formed one turn; and an iron core 51 that is disposed inside the plurality of cases 41 and 42. The plurality of cases 41 and 42 are a choke coils disposed inside the first one-turn coil 31 and the second one-turn coil 32.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a choke coil, a coil case, and a coil. [Background technology]

[0002] A two-turn choke coil for large currents, which requires a large cross-sectional area of ​​the coil, is manufactured relatively inexpensively by cutting out the coil from a copper plate and bending it once. A related technology is described in Patent Document 1.

[0003] In the case of a choke coil with three or more turns, it is extremely difficult to bend it in more than two places, so one possible way to create a three-turn coil is to use a one-turn coil stamped out of copper plate, and a two-turn coil stamped out and bent once, and then fasten the one-turn coil and two-turn coil together at a fastening point separate from the fastening point used as the terminal.

[0004] Furthermore, there is a demand for the coil portion of a choke coil that uses a coil of two or more turns to be reliably positioned in a fixed position. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5598400 Summary of the Invention [Problem to be solved by the invention]

[0006] Various aspects of the present invention aim to provide a choke coil, a coil case, and a coil that can reliably fix the position of a coil portion of a choke coil that uses a coil of two or more turns. [Means for solving the problem]

[0007] Various aspects of the present invention are described below.

[0008] [1] A plurality of cases, each of which has a first slit having a first plane and a second slit having a second plane parallel to the first plane; a first one-turn coil inserted into the first slit and having a shape of a first strip-shaped conductor wound around one turn; a second one-turn coil inserted into the second slit and electrically connected to the first one-turn coil, the second one-turn coil having a shape obtained by winding a second strip-shaped conductor around; an iron core disposed inside the plurality of cases; and the plurality of cases are disposed inside the first one-turn coil and the second one-turn coil and fix a distance between the first one-turn coil and the second one-turn coil, a wide surface of the first strip conductor is parallel to the first plane; a wide surface of the second strip-shaped conductor is parallel to the second plane; The choke coil is characterized in that the plurality of cases are made of an insulator.

[0009] According to the choke coil [1] of one aspect of the present invention, multiple cases are provided inside the first one-turn coil and the second one-turn coil, and first and second slits are provided in the multiple cases, with the first one-turn coil inserted into the first slit and the second one-turn coil inserted into the second slit. This fixes the positions of the first and second one-turn coils. As a result, the first and second one-turn coils are prevented from moving freely, the distance between the first one-turn coil and the second one-turn coil is fixed, and insulation between the first one-turn coil and the second one-turn coil is ensured.

[0010] [2] In [1] above, each of the plurality of cases has a third slit having a third plane parallel to the second plane; a third one-turn coil inserted into the third slit, electrically connected to the second one-turn coil, and having a shape obtained by winding a third strip-shaped conductor around; the plurality of cases are disposed inside the third one-turn coil and fix a distance between the second one-turn coil and the third one-turn coil, A choke coil, wherein the wide surface of the third strip-shaped conductor is parallel to the third plane.

[0011] According to the choke coil of [2] above according to one aspect of the present invention, multiple cases are provided inside the third one-turn coil, third slits are provided in the multiple cases, and the third one-turn coil is inserted into the third slits. This fixes the position of the third one-turn coil. As a result, the second and third one-turn coils are prevented from moving freely, the distance between the second one-turn coil and the third one-turn coil is fixed, and insulation between the second one-turn coil and the third one-turn coil is ensured.

[0012] [3] In [2] above, A choke coil, characterized in that an adhesive is disposed on at least a portion of the contact area of ​​each of the first one-turn coil, the second one-turn coil, and the third one-turn coil with each of the plurality of cases.

[0013] According to the choke coil [3] of one aspect of the present invention, an adhesive is applied to at least a portion of the contact area of ​​each of the first one-turn coil, the second one-turn coil, and the third one-turn coil with each of the multiple cases. This fixes each of the first one-turn coil, the second one-turn coil, and the third one-turn coil to each of the multiple cases. As a result, the distance between the first one-turn coil, the second one-turn coil, and the third one-turn coil can be more reliably fixed.

[0014] [4] In paragraph [2] above, A choke coil characterized in that one end of the first one-turn coil and one end of the second one-turn coil are electrically connected by welding or screwing with a plate-shaped conductor sandwiched therebetween.

[0015] According to the choke coil [4] of one aspect of the present invention, one end of the first one-turn coil and one end of the second one-turn coil are electrically connected by welding or screwing via a plate-shaped conductor, thereby eliminating the need to fabricate a coil with a complex shape and facilitating the fabrication of the coils.

[0016] [5] In [2] or [4] above, A choke coil, characterized in that the other end of the second one-turn coil and one end of the third one-turn coil are electrically connected by bending.

[0017] According to the choke coil [5] of one aspect of the present invention, the other end of the second one-turn coil and one end of the third one-turn coil are electrically connected by bending, which eliminates the need to fabricate a coil with a complex shape and makes it easier to fabricate the coil.

[0018] [6] In [2] or [4] above, A choke coil characterized in that the other end of the second one-turn coil and one end of the third one-turn coil are electrically connected by welding or screwing with a plate-shaped conductor sandwiched therebetween.

[0019] According to the choke coil [6] of one aspect of the present invention, the other end of the second one-turn coil and one end of the third one-turn coil are electrically connected by welding or screwing via a plate-shaped conductor, thereby eliminating the need to fabricate a coil with a complex shape and facilitating coil fabrication.

[0020] [7] In any one of paragraphs [1] to [4] above, The choke coil is characterized in that the plurality of cases are separated from each other.

[0021] According to the choke coil [7] above of one aspect of the present invention, when inserting the one-turn coil into the slit of the case from the inside, the multiple cases are separated from each other, making it easy to insert the one-turn coil into the slit.

[0022] [8] In any one of paragraphs [2] to [4] above, A choke coil, wherein, in plan view, the insides of the first one-turn coil, the second one-turn coil, and the third one-turn coil are circular, elliptical, or polygonal.

[0023] [9] A first slit having a first plane and a second slit having a second plane parallel to the first plane; the first slit is for inserting a first one-turn coil having a shape obtained by wrapping a first strip-shaped conductor around itself from the inside, the second slit is configured to receive a second one-turn coil, the second one-turn coil being electrically connected to the first one-turn coil and having a shape obtained by winding a second strip-shaped conductor around the first one-turn coil, inserted from the inside; A coil case made of an insulating material, which fixes the distance between the first one-turn coil and the second one-turn coil.

[0024] The coil case according to one aspect of the present invention, described above in [9], includes a first slit having a first plane and a second slit having a second plane parallel to the first plane. Therefore, the first one-turn coil can be inserted into the first slit of the coil case from inside the first one-turn coil, and the second one-turn coil can be inserted into the second slit of the coil case from inside the second one-turn coil. As a result, the positions of the first and second one-turn coils can be reliably fixed.

[0025]

[10] In paragraph [9] above, a third slit having a third plane parallel to the second plane; the third slit is electrically connected to the second one-turn coil and is adapted to receive a third one-turn coil having a shape obtained by winding a third strip-shaped conductor from the inside; A coil case that fixes the distance between the second one-turn coil and the third one-turn coil.

[0026] The coil case according to one aspect of the present invention, described above in

[10] , is provided with a third slit having a third plane parallel to the second plane. This allows the third one-turn coil to be inserted into the third slit of the coil case from inside the third one-turn coil. As a result, the first to third one-turn coils can be reliably positioned.

[0027]

[11] A first one-turn coil having a shape of a first strip-shaped conductor wound around one end, the first one-turn coil being inserted into a first slit of each of a plurality of cases made of an insulator from the inside of the first strip-shaped conductor; a second one-turn coil electrically connected to the first one-turn coil, having a shape of a second strip-shaped conductor wound around one turn, and adapted to be inserted into the second slit of each of the plurality of cases from inside the second strip-shaped conductor; A coil comprising:

[0028] According to the coil

[11] of one aspect of the present invention, the first one-turn coil is electrically connected to the second one-turn coil, and the first one-turn coil is inserted into the first slit of each of the multiple cases, and the second one-turn coil is inserted into the second slit of each of the multiple cases. This allows the first and second one-turn coils to be reliably positioned in fixed positions.

[0029]

[12] In paragraph

[11] above, A coil characterized by having a third one-turn coil electrically connected to the second one-turn coil, having a shape of a third strip conductor wound around one turn, and to be inserted into a third slit of each of the plurality of cases from the inside of the third strip conductor.

[0030] According to the coil

[12] of one aspect of the present invention, the second one-turn coil is electrically connected to the third one-turn coil, and the third one-turn coil is inserted into the third slit of each of the multiple cases, thereby ensuring that the positions of the first to third one-turn coils are fixed.

[0031]

[13] In paragraph

[12] above, A coil characterized in that one end of the first one-turn coil and one end of the second one-turn coil are electrically connected by welding or screwing with a plate-shaped conductor sandwiched therebetween.

[0032] According to the coil

[13] of one aspect of the present invention, one end of the first one-turn coil and one end of the second one-turn coil are electrically connected by welding or screwing via a plate-shaped conductor, thereby eliminating the need to fabricate a coil with a complex shape and facilitating the fabrication of the coils.

[0033]

[14] In paragraphs

[12] or

[13] above, A coil characterized in that the other end of the second one-turn coil and one end of the third one-turn coil are electrically connected by bending.

[0034] According to the coil

[14] of one aspect of the present invention, the other end of the second one-turn coil and one end of the third one-turn coil are electrically connected by bending, which eliminates the need to fabricate a coil with a complex shape and makes it easier to fabricate the coil.

[0035]

[15] In paragraphs

[12] or

[13] above, A coil characterized in that the other end of the second one-turn coil and one end of the third one-turn coil are electrically connected by welding or screwing with a plate-shaped conductor sandwiched therebetween.

[0036] According to the coil

[15] of one aspect of the present invention, the other end of the second one-turn coil and one end of the third one-turn coil are electrically connected by welding or screwing via a plate-shaped conductor, which eliminates the need to fabricate a coil with a complex shape and makes it easier to fabricate the coils.

[0037]

[16] A plurality of cases, each of which has a first slit having a first plane and a second slit having a second plane parallel to the first plane; a first one-turn coil inserted into the first slit and having a shape of a first strip-shaped conductor wound around one turn; a second one-turn coil inserted into the second slit and electrically connected to the first one-turn coil, the second one-turn coil having a shape obtained by winding a second strip-shaped conductor around; and the plurality of cases are disposed inside the first one-turn coil and the second one-turn coil and fix a distance between the first one-turn coil and the second one-turn coil, a wide surface of the first strip conductor is parallel to the first plane; a wide surface of the second strip-shaped conductor is parallel to the second plane; A coil characterized in that the multiple cases are made of an insulator.

[0038] According to the coil

[16] of one aspect of the present invention, multiple cases are provided inside the first one-turn coil and the second one-turn coil, and first and second slits are provided in the multiple cases, with the first one-turn coil inserted into the first slit and the second one-turn coil inserted into the second slit, thereby ensuring that the positions of the first and second one-turn coils are fixed.

[0039]

[17] In paragraph

[16] above: each of the plurality of cases has a third slit having a third plane parallel to the second plane; a third one-turn coil inserted into the third slit, electrically connected to the second one-turn coil, and having a shape obtained by winding a third strip-shaped conductor around; the plurality of cases are disposed inside the third one-turn coil and fix a distance between the second one-turn coil and the third one-turn coil, A coil characterized in that the wide surface of the third strip conductor is parallel to the third plane.

[0040] According to the coil

[17] of one aspect of the present invention, multiple cases are provided inside the third one-turn coil, third slits are provided in the multiple cases, and the third one-turn coil is inserted into the third slits. This ensures that the positions of the first to third one-turn coils are fixed.

[0041]

[18] In paragraph

[17] above: A coil characterized in that adhesive is disposed on at least a portion of the contact area of ​​each of the first one-turn coil, the second one-turn coil, and the third one-turn coil with each of the multiple cases.

[0042] According to the coil

[18] of one aspect of the present invention, an adhesive is applied to at least a portion of the contact area of ​​each of the first one-turn coil, the second one-turn coil, and the third one-turn coil with each of the multiple cases. This fixes each of the first one-turn coil, the second one-turn coil, and the third one-turn coil to each of the multiple cases. As a result, the distance between the first one-turn coil, the second one-turn coil, and the third one-turn coil can be more reliably fixed. [Effects of the Invention]

[0043] According to various aspects of the present invention, it is possible to provide a choke coil, a coil case, and a coil that can reliably fix the position of the coil portion of a choke coil that uses a coil of two or more turns. [Brief explanation of the drawings]

[0044] [Figure 1] FIG. 1 is a perspective view showing a plurality of cases of a choke coil according to an embodiment of the present invention. [Figure 2] 2 is a perspective view showing a state in which first and second one-turn coils are inserted into slits of a plurality of cases shown in FIG. 1. FIG. [Figure 3] 2 is a perspective view showing a state in which first, second, and third one-turn coils are inserted into slits of a plurality of cases shown in FIG. 1. FIG. [Figure 4] FIG. 4 is a cross-sectional view showing a state in which the first, second, and third one-turn coils are fixed by the multiple cases shown in FIG. 3, an iron core is inserted inside the multiple cases in this fixed state, and the portions of the one-turn coils other than the terminals are stored. [Figure 5] 5 is a perspective view showing a state in which the portion of the one-turn coil shown in FIG. 4 other than the terminals is stored. [Figure 6] 1 is a perspective view showing a state in which parts other than the terminals of a one-turn coil according to an embodiment of the present invention are stored. FIG. [Figure 7] 1 is a perspective view showing a state in which parts other than the terminals of a one-turn coil according to an embodiment of the present invention are stored. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0045] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following description, and it will be readily understood by those skilled in the art that various changes in form and details can be made without departing from the spirit and scope of the present invention. Therefore, the present invention should not be interpreted as being limited to the description of the embodiments shown below.

[0046] (First embodiment) Fig. 1 is a perspective view showing multiple cases of a choke coil according to one embodiment of the present invention. Fig. 2 is a perspective view showing a state in which first and second one-turn coils are inserted into slits in the multiple cases shown in Fig. 1. Fig. 3 is a perspective view showing a state in which first, second, and third one-turn coils are inserted into slits in the multiple cases shown in Fig. 1. Fig. 4 is a cross-sectional view showing a state in which the first, second, and third one-turn coils are fixed by the multiple cases shown in Fig. 3, an iron core is inserted inside the multiple cases in this fixed state, and the portions of the one-turn coils other than the terminals are stored. Fig. 5 is a perspective view showing a state in which the portions of the one-turn coil shown in Fig. 4 other than the terminals are stored.

[0047] 1, the choke coil according to one aspect of the present invention has a plurality of cases 41, 42, and in this embodiment, an example is given in which the choke coil has two cases 41, 42. Each of the two cases 41, 42 has a first slit 61 having a first plane 11, a second slit 62 having a second plane 12 parallel to the first plane 11, and a third slit 63 having a third plane 13 parallel to the second plane 12.

[0048] The choke coil includes first to third one-turn coils 31, 32, and 33, as shown in FIGS. 2 and 3. As shown in FIG. 2, the first one-turn coil 31 has a shape obtained by wrapping a first strip-shaped conductor around once, and is inserted into the first slit 61 of each of the two cases 41 and 42. The second one-turn coil 32 has a shape obtained by wrapping a second strip-shaped conductor around once, and is inserted into the second slit 62 of each of the two cases 41 and 42. The second one-turn coil 32 is electrically connected to the first one-turn coil 31. As shown in FIG. 3, the third one-turn coil 33 has a shape obtained by wrapping a third strip-shaped conductor around once, and is inserted into the third slit 63 of each of the two cases 41 and 42. The third one-turn coil 33 is electrically connected to the second one-turn coil 32.

[0049] As shown in Fig. 2, the two cases 41 and 42 are arranged inside the first one-turn coil 31 and the second one-turn coil 32, and fix the distance between the first one-turn coil 31 and the second one-turn coil 32. As shown in Fig. 3, the two cases 41 and 42 are arranged inside the third one-turn coil 33, and fix the distance between the second one-turn coil 32 and the third one-turn coil 33.

[0050] 1 and 2, the wide surface 21 of the first strip-shaped conductor of the first one-turn coil 31 is arranged parallel to the first plane 11, and the wide surface 22 of the second strip-shaped conductor of the second one-turn coil 32 is arranged parallel to the second plane 12. Furthermore, as shown in Fig. 3, the wide surface 23 of the third strip-shaped conductor of the third one-turn coil 33 is arranged parallel to the third plane 13. Furthermore, the two cases 41 and 42 are made of an insulator.

[0051] 4, an iron core 51 is disposed inside two cases 41, 42 each having first to third one-turn coils 31, 32, 33 inserted into first to third slits 61, 62, 63. This forms a choke coil.

[0052] It is preferable that adhesive (not shown) be applied to at least a portion of the contact area between each of the first one-turn coil 31, the second one-turn coil 32, and the third one-turn coil 33 and the two cases 41, 42.

[0053] 2, one end of the first one-turn coil 31 and one end of the second one-turn coil 32 are electrically connected via a plate-shaped conductor 65 sandwiched between them by screws 81. The plate-shaped conductor 65 is preferably a copper plate with a plated surface. This secures the first one-turn coil 31, the second one-turn coil 32, and the third one-turn coil 33 to each of the multiple cases 41, 42. As a result, the distance between the first one-turn coil 31, the second one-turn coil 32, and the third one-turn coil 33 can be more reliably fixed.

[0054] 3, the other end of the second one-turn coil 32 and one end of the third one-turn coil 33 are electrically connected via a plate-shaped conductor 66 by means of screws 82. The plate-shaped conductor 66 is preferably a copper plate with a plated surface. The first to third one-turn coils 31, 32, 33 are preferably made of copper or a copper alloy and formed by stamping a copper or copper alloy plate.

[0055] 1 to 3, the two cases 41, 42 are separated from each other. Therefore, as shown in FIGS. 2 and 3, when inserting the one-turn coils into the slits 61, 62 of the cases 41, 42 from inside the first to third one-turn coils 31, 32, 33, the one-turn coils can be easily inserted into the slits 61, 62.

[0056] In addition, in a plan view, the insides of the first one-turn coil 31, the second one-turn coil 32, and the third one-turn coil 33 are circular. Note that in this embodiment, the insides of the first to third one-turn coils 31 to 33 are circular, but this is not limitative, and the insides of the first to third one-turn coils 31 to 33 may be elliptical or polygonal.

[0057] As described above, by making the inside of the first to third one-turn coils 31 to 33 circular, elliptical or polygonal, the function as a choke coil can be fully exhibited.

[0058] According to this embodiment, multiple cases 41, 42 are provided inside the first one-turn coil 31 and the second one-turn coil 32, and first slits 61 and second slits 62 are provided in the multiple cases 41, 42. The first one-turn coil 31 is inserted into the first slit 61, and the second one-turn coil 32 is inserted into the second slit 62. This fixes the positions of the first and second one-turn coils 31, 32. As a result, the first and second one-turn coils 31, 32 are prevented from moving freely, the distance between the first one-turn coil 31 and the second one-turn coil 32 is fixed, and insulation between the first one-turn coil 31 and the second one-turn coil 32 is ensured (see FIGS. 1, 2, and 4).

[0059] In this embodiment, multiple cases 41, 42 are provided inside the third one-turn coil 33, third slits 63 are provided in the multiple cases 41, 42, and the third one-turn coil 33 is inserted into the third slits 63. This fixes the position of the third one-turn coil 33. As a result, the second and third one-turn coils 32, 33 are prevented from moving freely, the distance between the second one-turn coil 32 and the third one-turn coil 33 is fixed, and insulation between the second one-turn coil 32 and the third one-turn coil 33 is ensured (see FIGS. 1, 3, and 4).

[0060] Furthermore, according to this embodiment, one end of the first one-turn coil 31 and one end of the second one-turn coil 32 are electrically connected by sandwiching the plate-shaped conductor 65 and screwing it in place with screws 81, which eliminates the need to fabricate a coil with a complex shape and makes it easier to fabricate the coils.

[0061] Furthermore, according to this embodiment, the other end of the second one-turn coil 32 and one end of the third one-turn coil 33 are electrically connected by sandwiching the plate-shaped conductor 66 and using screws 82, which eliminates the need to fabricate a coil with a complex shape and makes it easier to fabricate the coil.

[0062] In this embodiment, a two-turn coil in which the first and second one-turn coils 31, 32 are connected, and a three-turn coil in which the first to third one-turn coils 31, 32, 33 are connected are described, but a choke coil using a four-turn coil or more can also be applied to the present invention.

[0063] (Second embodiment)

[0064] FIG. 6 is a perspective view showing a choke coil in which a one-turn coil and a two-turn coil are connected by welding according to one embodiment of the present invention. The same parts as those in FIG. 5 are given the same reference numerals, and only the different parts will be described.

[0065] One end of the first one-turn coil 31 and one end of the second one-turn coil 32 are electrically connected by welding 71 with a plate-shaped conductor 65 sandwiched therebetween. The other end of the second one-turn coil 32 and one end of the third one-turn coil 33 are electrically connected by bending 91.

[0066] In this embodiment, the same effects as in the first embodiment can be obtained. In addition, in this embodiment, the other end of the second one-turn coil 32 and one end of the third one-turn coil 33 are electrically connected by bending process 91, which eliminates the need to fabricate a coil with a complex shape and makes it easier to fabricate the coil.

[0067] (Third embodiment) FIG. 7 is a perspective view showing a choke coil in which a one-turn coil and a two-turn coil are connected by screws according to one embodiment of the present invention. The same parts as those in FIG. 5 are given the same reference numerals, and only the different parts will be described.

[0068] The other end of the second one-turn coil 32 and one end of the third one-turn coil 33 are electrically connected by bending 91 .

[0069] In this embodiment, the same effects as in the first embodiment can be obtained. In addition, in this embodiment, the other end of the second one-turn coil 32 and one end of the third one-turn coil 33 are electrically connected by bending process 91, which eliminates the need to fabricate a coil with a complex shape and makes it easier to fabricate the coil.

[0070] (Fourth embodiment) A coil case according to one aspect of the present invention will be described with reference to FIGS. 1, 2 and 3. FIG.

[0071] The coil case 41 shown in FIG. 1 has a first slit 61 having a first plane 11 and a second slit 62 having a second plane 12 parallel to the first plane 11. The first slit 61 is for inserting, from the inside, the first one-turn coil 31 having a shape obtained by wrapping around the first strip-shaped conductor shown in FIG. 2, and the second slit 62 is for inserting, from the inside, the second one-turn coil 32 having a shape obtained by wrapping around the second strip-shaped conductor. The second one-turn coil 32 is electrically connected to the first one-turn coil 31. The coil case 41 is made of an insulator and fixes the distance between the first one-turn coil 31 and the second one-turn coil 32 (see FIG. 4).

[0072] 1 also includes a third slit 63 having a third plane 13 parallel to the second plane 12. The third slit 63 is for inserting the third one-turn coil 33, which has a shape obtained by wrapping a third strip-shaped conductor around once, from the inside. The third one-turn coil 33 is electrically connected to the second one-turn coil 32. The coil case 41 fixes the distance between the second one-turn coil 32 and the third one-turn coil 33.

[0073] According to this embodiment, the coil case 41 includes a first slit 61 having a first plane 11, a second slit 62 having a second plane 12 parallel to the first plane 11, and a third slit 63 having a third plane 13 parallel to the second plane 12. Therefore, the first one-turn coil 31 can be inserted into the first slit 61 of the coil case 41 from inside the first one-turn coil 31, the second one-turn coil 32 can be inserted into the second slit 62 of the coil case 41 from inside the second one-turn coil 32, and the third one-turn coil 33 can be inserted into the third slit 63 of the coil case 41 from inside the third one-turn coil 33. As a result, the first to third one-turn coils 31 to 33 can be reliably positioned in fixed positions.

[0074] (Fifth embodiment) A coil according to one aspect of the present invention will be described with reference to FIGS. 1 to 3, 6 and 7. FIG.

[0075] The coil shown in Fig. 2 has a first one-turn coil 31 and a second one-turn coil 32. The first one-turn coil 31 has the shape of a first strip-shaped conductor wound around once, and is inserted into a first slit 61 of each of the multiple cases 41 and 42 made of an insulator from the inside of the first strip-shaped conductor. The first one-turn coil 31 is electrically connected to the second one-turn coil 32. The second one-turn coil 32 has the shape of a second strip-shaped conductor wound around once, and is inserted into a second slit 62 of each of the multiple cases 41 and 42 from the inside of the second strip-shaped conductor.

[0076] 3 further includes a third one-turn coil electrically connected to the second one-turn coil 32. The third one-turn coil 33 has a shape obtained by wrapping the third strip-shaped conductor around once, and is inserted into the third slit 63 of each of the multiple cases 41, 42 from the inside of the third strip-shaped conductor.

[0077] According to this embodiment, the first one-turn coil 31 is electrically connected to the second one-turn coil 32, and the second one-turn coil 32 is electrically connected to the third one-turn coil 33, and the first one-turn coil 31 is inserted into the first slit 61 of each of the multiple cases 41, 42, the second one-turn coil 32 is inserted into the second slit 62 of each of the multiple cases 41, 42, and the third one-turn coil 33 is inserted into the third slit 63 of each of the multiple cases 41, 42. This ensures that the first to third one-turn coils 31 to 33 are positioned in fixed positions.

[0078] (Sixth embodiment) A coil fixed between a plurality of cases 41 and 42 according to one embodiment of the present invention will be described with reference to FIGS.

[0079] Each of the coils fixed by the multiple cases 41, 42 shown in FIGS. 1 and 2 includes a first slit 61 having a first plane 11, a second slit 62 having a second plane 12 parallel to the first plane 11, and a third slit 63 having a third plane 13 parallel to the second plane 12. A first one-turn coil 31 having a shape obtained by winding a first strip-shaped conductor is inserted into the first slit 61. A second one-turn coil 32 having a shape obtained by winding a second strip-shaped conductor is inserted into the second slit 62. A third one-turn coil 33 having a shape obtained by winding a third strip-shaped conductor is inserted into the third slit 63. The third one-turn coil 33 is electrically connected to the second one-turn coil 32, and the second one-turn coil 32 is electrically connected to the first one-turn coil 31.

[0080] The multiple cases 41, 42 are made of an insulator and are arranged inside the first one-turn coil 31, the second one-turn coil 32, and the third one-turn coil 33, and fix the distance between the first one-turn coil 31, the second one-turn coil 32, and the third one-turn coil 33. As shown in Figures 1 and 2, the wide surface 21 of the first strip conductor is parallel to the first plane 11, and the wide surface 22 of the second strip conductor is parallel to the second plane 12. The wide surface 23 of the third strip conductor is parallel to the third plane 13.

[0081] According to this embodiment, multiple cases 41, 42 are provided inside the first one-turn coil 31, the second one-turn coil 32, and the third one-turn coil 33, and a first slit 61, a second slit 62, and a third slit 63 are provided in the multiple cases 41, 42, with the first one-turn coil 31 inserted into the first slit 61, the second one-turn coil 32 inserted into the second slit 62, and the third one-turn coil 33 inserted into the third slit 63. This ensures that the first to third one-turn coils 31 to 33 are positioned in fixed positions.

[0082] The present invention can also be implemented by appropriately combining the first to sixth embodiments described above. [Explanation of symbols]

[0083] 11 First Plane 12 The Second Plane 13 The Third Plane 21 Wide surface of first strip conductor 22 Wide surface of second strip conductor 23 Broad surface of the third strip conductor 31 First 1-turn coil 32 Second 1-turn coil 33 Third 1-turn coil 41, 42 Case (coil case) 51 Iron Core 61 First Slit 62 Second Slit 63 Third Slit 65, 66 Plate conductor 71 Welding 81 Screw fastening 91 Bending

Claims

1. a plurality of cases, each of which has a first slit having a first plane and a second slit having a second plane parallel to the first plane; a first one-turn coil inserted into the first slit and having a shape of a first strip-shaped conductor wound around one turn; a second one-turn coil inserted into the second slit and electrically connected to the first one-turn coil, the second one-turn coil having a shape obtained by winding a second strip-shaped conductor around; an iron core disposed inside the plurality of cases; and the plurality of cases are disposed inside the first one-turn coil and the second one-turn coil and fix a distance between the first one-turn coil and the second one-turn coil, a wide surface of the first strip conductor is parallel to the first plane; a wide surface of the second strip-shaped conductor is parallel to the second plane; The choke coil is characterized in that the plurality of cases are made of an insulator.

2. In claim 1, each of the plurality of cases has a third slit having a third plane parallel to the second plane; a third one-turn coil inserted into the third slit, electrically connected to the second one-turn coil, and having a shape obtained by winding a third strip-shaped conductor around; the plurality of cases are disposed inside the third one-turn coil and fix a distance between the second one-turn coil and the third one-turn coil, A choke coil, wherein the wide surface of the third strip-shaped conductor is parallel to the third plane.

3. In claim 2, A choke coil, characterized in that an adhesive is disposed on at least a portion of the contact portion of each of the first one-turn coil, the second one-turn coil, and the third one-turn coil with each of the plurality of cases.

4. In claim 2, A choke coil characterized in that one end of the first one-turn coil and one end of the second one-turn coil are electrically connected by welding or screwing with a plate-shaped conductor sandwiched therebetween.

5. In claim 2 or 4, The other end of the second one-turn coil and one end of the third one-turn coil are electrically connected by bending.

6. In claim 2 or 4, The other end of the second one-turn coil and one end of the third one-turn coil are electrically connected by welding or screwing with a plate-shaped conductor sandwiched therebetween.

7. In any one of claims 1 to 4, The choke coil is characterized in that the plurality of cases are separated from each other.

8. In any one of claims 2 to 4, 10. A choke coil, wherein, in plan view, the insides of the first one-turn coil, the second one-turn coil, and the third one-turn coil are circular, elliptical, or polygonal.

9. a first slit having a first plane and a second slit having a second plane parallel to the first plane; the first slit is for inserting a first one-turn coil having a shape obtained by wrapping a first strip-shaped conductor around the first slit from the inside, the second slit is configured to receive a second one-turn coil, the second one-turn coil being electrically connected to the first one-turn coil and having a shape obtained by wrapping a second strip-shaped conductor around the second one-turn coil, inserted from the inside; A coil case made of an insulating material, which fixes the distance between the first one-turn coil and the second one-turn coil.

10. In claim 9, a third slit having a third plane parallel to the second plane; the third slit is configured to receive a third one-turn coil, the third one-turn coil being electrically connected to the second one-turn coil and having a shape obtained by wrapping a third strip-shaped conductor around the third one-turn coil, inserted from the inside; A coil case that fixes the distance between the second one-turn coil and the third one-turn coil.

11. a first one-turn coil having a shape of a first strip-shaped conductor wound around one end, the first one-turn coil being adapted to be inserted into a first slit of each of a plurality of cases made of an insulator from inside the first strip-shaped conductor; a second one-turn coil electrically connected to the first one-turn coil, having a shape obtained by winding a second strip-shaped conductor around once, and adapted to be inserted into the second slits of each of the plurality of cases from inside the second strip-shaped conductor; A coil comprising:

12. In claim 11, A coil characterized by having a third one-turn coil electrically connected to the second one-turn coil, having a shape of a third strip conductor wound around one turn, and for inserting into a third slit of each of the plurality of cases from the inside of the third strip conductor.

13. In claim 12, A coil characterized in that one end of the first one-turn coil and one end of the second one-turn coil are electrically connected by welding or screwing with a plate-shaped conductor sandwiched therebetween.

14. In claim 12 or 13, The other end of the second one-turn coil and one end of the third one-turn coil are electrically connected by bending.

15. In claim 12 or 13, The other end of the second one-turn coil and one end of the third one-turn coil are electrically connected by welding or screwing with a plate-shaped conductor sandwiched therebetween.

16. a plurality of cases, each of which has a first slit having a first plane and a second slit having a second plane parallel to the first plane; a first one-turn coil inserted into the first slit and having a shape of a first strip-shaped conductor wound around one turn; a second one-turn coil inserted into the second slit and electrically connected to the first one-turn coil, the second one-turn coil having a shape obtained by winding a second strip-shaped conductor around; and the plurality of cases are disposed inside the first one-turn coil and the second one-turn coil and fix a distance between the first one-turn coil and the second one-turn coil, a wide surface of the first strip conductor is parallel to the first plane; a wide surface of the second strip-shaped conductor is parallel to the second plane; A coil characterized in that the multiple cases are made of an insulator.

17. In claim 16, each of the plurality of cases has a third slit having a third plane parallel to the second plane; a third one-turn coil inserted into the third slit, electrically connected to the second one-turn coil, and having a shape obtained by winding a third strip-shaped conductor around; the plurality of cases are disposed inside the third one-turn coil and fix a distance between the second one-turn coil and the third one-turn coil, A coil characterized in that the wide surface of the third strip conductor is parallel to the third plane.

18. In claim 17, A coil characterized in that an adhesive is disposed on at least a portion of the contact area of ​​each of the first one-turn coil, the second one-turn coil, and the third one-turn coil with each of the plurality of cases.

Images