Choke coil, bobbin, 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 a coil can be reliably fixed.SOLUTION: A choke coil includes: a plate-like body 101 having a first plane 11; a first side wall 41 formed on the first plane 11; a bobbin 121 having a first step 111 having a second plane 12 formed on the first side wall 41 and a second side wall 42 formed one turn on the second plane 12; a first one-turn coil 31 in contact with the first side wall 41 and disposed on the first plane 11 of the plate-like body 101 and having a shape in which a first band-shaped conductor is formed one turn; a second one-turn coil 32 which is in contact with the second side wall 42, disposed on the second plane 12 of the first stage 111, 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 in which a hole 131 is provided in the bobbin 121 and which is disposed inside the hole 131.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] A two-turn choke coil for large currents, which requires a large cross-sectional area, 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 bobbin, 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 bobbin having a plate-like body having a first plane, a first side wall wound around the first plane, a first step having a second plane formed on the first side wall, and a second side wall wound around the second plane; a first one-turn coil in contact with the first side wall, disposed on the first plane of the plate-like body, and having a shape obtained by winding a first strip-shaped conductor around; a second one-turn coil in contact with the second side wall, disposed on the second plane of the first stage, electrically connected to the first one-turn coil, and having a shape obtained by winding a second strip-shaped conductor around once; A hole is provided in the bobbin, and an iron core is disposed inside the hole; and the second side wall is disposed more inward than the first side wall in a plan view, the first plane is parallel to the second plane; the bobbin fixes the 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 bobbin is made of an insulator.

[0009] According to the choke coil of one aspect of the present invention, the bobbin includes a plate-like body having a first flat surface, a first sidewall extending around the first flat surface, a first stage having a second flat surface formed on the first sidewall, and a second sidewall extending around the second flat surface. A first one-turn coil having a shape obtained by extending the first strip-shaped conductor is in contact with the first sidewall and disposed on the first flat surface of the plate-like body. A second one-turn coil having a shape obtained by extending the second strip-shaped conductor is in contact with the second sidewall and disposed on the second flat surface of the first stage. 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, the bobbin includes a second section having a third plane connected to the second side wall and parallel to the second plane, and a third side wall extending around the third plane; the third side wall is disposed more inward than the second side wall in a plan view, a third one-turn coil in contact with the third side wall, disposed on the third plane of the second stage, electrically connected to the second one-turn coil, and having a shape obtained by winding a third strip-shaped conductor around once; the bobbin fixes the 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, the third one-turn coil, which has a shape obtained by winding the third strip-shaped conductor, contacts the third side wall and is disposed on the third plane of the second stage. 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 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 the bobbin.

[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 the bobbin. This fixes each of the first one-turn coil, the second one-turn coil, and the third one-turn coil to the bobbin. 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 [2] or [3] 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 together plate-shaped conductors.

[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 together the plate-shaped conductors, which eliminates the need to fabricate a coil with a complex shape and makes it easier to fabricate the coils.

[0016] [5] In [2] or [4] above, 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 together plate-shaped conductors.

[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 together the plate-shaped conductors, which eliminates the need to fabricate a coil with a complex shape and makes it easier to fabricate the coils.

[0020] [7] In any one of paragraphs [2] to [4] above, A choke coil characterized in that, in plan view, the hole of the bobbin has a circular shape, an elliptical shape, a shape obtained by straightening a curved portion of an ellipse in the longitudinal direction, or a polygonal shape.

[0021] [8] A plate-like body having a first plane and a hole; a first step having a first sidewall surrounding the hole on the first plane and a second plane formed on the first sidewall; a second side wall extending around the second plane; and the first plane is parallel to the second plane; the second side wall is disposed more inward than the first side wall in a plan view, the first side wall is in contact with a first one-turn coil that has a shape obtained by wrapping a first strip-shaped conductor around the first side wall by disposing the first one-turn coil on the first plane of the plate-shaped body, and the second side wall is electrically connected to the first one-turn coil, and a second one-turn coil having a shape obtained by winding a second strip-shaped conductor around the second side wall is disposed on the second plane of the first stage, thereby bringing the second one-turn coil into contact with the second side wall; 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 bobbin characterized in that the material is made of an insulating material.

[0022] According to the bobbin of [8] above, one aspect of the present invention is a bobbin including a plate-like body having a first plane and a hole, a first sidewall extending around the hole on the first plane, a first stage having a second plane formed on the first sidewall, and a second sidewall extending around the second plane. Therefore, by placing a first one-turn coil having a shape obtained by wrapping a first strip-shaped conductor around the first plane on the first plane of the plate-like body, the first one-turn coil can be brought into contact with the first sidewall, and by placing a second one-turn coil having a shape obtained by wrapping a second strip-shaped conductor around the second plane of the first stage, the second one-turn coil can be brought into contact with the second sidewall. As a result, the positions of the first and second one-turn coils can be reliably fixed.

[0023] [9] In paragraph [8] above, a second step having a third plane connected to the second sidewall and parallel to the second plane; a third side wall extending around the third plane; and the third side wall is disposed more inward than the second side wall in a plan view, the third side wall is electrically connected to the second one-turn coil, and the third one-turn coil is arranged on the third plane of the second stage, the third one-turn coil having a shape obtained by winding a third strip-shaped conductor around the third side wall, thereby bringing the third one-turn coil into contact with the third side wall; A bobbin, wherein the wide surface of the third strip-shaped conductor is parallel to the third plane.

[0024] According to the bobbin of [9] above, one aspect of the present invention, the bobbin includes a second stage having a third plane connected to the second side wall and parallel to the second plane, and a third side wall that is wound around the third plane. Therefore, by placing a third one-turn coil having a shape that is a winding of the third strip-shaped conductor on the third plane of the second stage, the third one-turn coil can be brought into contact with the third side wall. As a result, the positions of the first to third one-turn coils can be reliably fixed.

[0025]

[10] A first one-turn coil having a shape of a first strip-shaped conductor wound around one end, the first one-turn coil being arranged on a first plane of a plate-shaped body having a hole in a bobbin made of an insulator, and adapted to come into contact with a first side wall wound around the hole on the first plane; 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 disposed on a second flat surface of the first stage of the bobbin, for contacting the second side wall wound around the second flat surface; and the second side wall is disposed more inward than the first side wall in a plan view, the first plane is parallel to the second plane; a wide surface of the first strip conductor is parallel to the first plane; A coil characterized in that the wide surface of the second strip conductor is parallel to the second plane.

[0026] According to the coil

[10] 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 in contact with the first side wall that wraps around the hole on the first flat surface of the plate-shaped body of the bobbin, and the second one-turn coil is in contact with the second side wall that wraps around the hole on the second flat surface of the first stage of the bobbin. This allows the first and second one-turn coils to be reliably positioned in fixed positions.

[0027]

[11] In paragraph

[10] above, a third one-turn coil electrically connected to the second one-turn coil, having a shape of a third band-shaped conductor wound around one turn, and disposed on a third flat surface of the second stage of the bobbin, for contacting a third side wall wound around the third flat surface; the second step has a third plane connected to the second sidewall and parallel to the second plane; the third side wall is disposed more inward than the second side wall in a plan view, A coil characterized in that the wide surface of the third strip conductor is parallel to the third plane.

[0028] According to the coil

[11] 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 in contact with the third side wall that is wound around the third plane of the second stage of the bobbin. This allows the first to third one-turn coils to be reliably positioned in fixed positions.

[0029]

[12] In paragraph

[11] 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 together plate-shaped conductors.

[0030] According to the coil

[12] 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 together the plate-shaped conductors, which eliminates the need to fabricate a coil with a complex shape and makes it easier to fabricate the coils.

[0031]

[13] In paragraphs

[11] or

[12] 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.

[0032] According to the coil

[13] 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.

[0033]

[14] In paragraphs

[11] or

[12] 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 together plate-shaped conductors.

[0034] According to the coil

[14] of one embodiment 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 together the plate-shaped conductor 62, which eliminates the need to fabricate a coil with a complex shape and makes it easier to fabricate the coil.

[0035]

[15] A bobbin having a plate-like body having a first plane, a first side wall wound around the first plane, a first step having a second plane formed on the first side wall, and a second side wall wound around the second plane; a first one-turn coil in contact with the first side wall, disposed on the first plane of the plate-like body, and having a shape obtained by winding a first strip-shaped conductor around; a second one-turn coil in contact with the second side wall, disposed on the second plane of the first stage, electrically connected to the first one-turn coil, and having a shape obtained by winding a second strip-shaped conductor around once; and the second side wall is disposed more inward than the first side wall in a plan view, the first plane is parallel to the second plane; the bobbin fixes the 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 coil is characterized in that the bobbin is made of an insulator.

[0036] According to the coil

[15] of one aspect of the present invention, the bobbin has a plate-like body having a first flat surface, a first sidewall extending around the first flat surface, a first stage having a second flat surface formed on the first sidewall, and a second sidewall extending around the second flat surface, wherein a first one-turn coil having a shape obtained by extending the first strip-shaped conductor around the first flat surface is in contact with the first sidewall and is disposed on the first flat surface of the plate-like body, and a second one-turn coil having a shape obtained by extending the second strip-shaped conductor around the second flat surface is in contact with the second sidewall and is disposed on the second flat surface of the first stage. This allows the first and second one-turn coils to be reliably positioned in fixed positions.

[0037]

[16] In paragraph

[15] above: the bobbin includes a second section having a third plane connected to the second side wall and parallel to the second plane, and a third side wall extending around the third plane; the third side wall is disposed more inward than the second side wall in a plan view, a third one-turn coil in contact with the third side wall, disposed on the third plane of the second stage, electrically connected to the second one-turn coil, and having a shape obtained by winding a third strip-shaped conductor around once; the bobbin fixes the 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.

[0038] According to the coil

[16] of one aspect of the present invention, the third one-turn coil, which has a shape obtained by wrapping the third strip-shaped conductor around once, is in contact with the third side wall and is disposed on the third plane of the second stage, thereby ensuring that the position of the third one-turn coil is fixed.

[0039]

[17] In paragraph

[16] above: A coil characterized in that adhesive is disposed on at least a portion of the first one-turn coil, the second one-turn coil, and the third one-turn coil that contact the bobbin.

[0040] According to the choke coil

[17] 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 the bobbin. This fixes each of the first one-turn coil, the second one-turn coil, and the third one-turn coil to the bobbin. 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]

[0041] According to various aspects of the present invention, it is possible to provide a choke coil, a bobbin, 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]

[0042] [Figure 1] FIG. 1 is a perspective view showing a bobbin 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 fixed to the bobbin 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 fixed to the bobbin shown in FIG. 1. FIG. [Figure 4] FIG. 4 is a cross-sectional view showing a state in which first, second, and third one-turn coils are fixed to the bobbin shown in FIG. 3, an iron core is inserted inside the bobbin in this fixed state, and portions of the one-turn coils other than the terminals are stored. [Figure 5] 1 is a perspective view showing a state in which first, second, and third one-turn coils are fixed to a bobbin in a choke coil according to an embodiment of the present invention. FIG. [Figure 6] 6 is a perspective view showing a state in which the portion of the one-turn coil shown in FIG. 5 other than the terminals is stored. [Figure 7] 1 is a perspective view showing a state in which first, second, and third one-turn coils are fixed to a bobbin in a choke coil according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0043] 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.

[0044] (First embodiment) Fig. 1 is a perspective view showing a bobbin 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 arranged on the bobbin shown in Fig. 1. Fig. 3 is a perspective view showing a state in which first, second, and third one-turn coils are arranged on the bobbin 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 to the bobbin shown in Fig. 3 and an iron core is inserted inside the fixed bobbin.

[0045] A choke coil according to one embodiment of the present invention has a bobbin 121 shown in Fig. 1, which is made of an insulator and has a hole 131 formed in it. The bobbin 121 has a plate-like body 101 having a first flat surface 11, and this plate-like body 101 has a hole 131. A first step 111 is formed on the first flat surface 11 of this plate-like body 101, and a second step 112 is formed on the first step 111. A third side wall 43 is formed on the second step 112.

[0046] As shown in FIG. 1 , the first stage 111 has a structure including a first side wall 41 that extends around the periphery of a hole 131 on the first flat surface 11 of the plate-like body 101, and a second flat surface 12 that is formed on the first side wall 41. The first stage 111 has the hole 131, and a second side wall 42 that extends around the periphery of the hole 131 is formed on the second flat surface 12 of the first stage 111. The second flat surface 12 is parallel to the first flat surface 11. A third flat surface 13 that is connected to the second side wall 42 and parallel to the second flat surface 12 is formed on the second side wall 42. The second side wall 42 and the third flat surface 13 form the second stage 112. The second stage 112 has the hole 131, and a third side wall 43 that extends around the periphery of the hole 131 is formed on the third flat surface 13 of the second stage 112. In plan view, the second side wall 42 is disposed more inward than the first side wall 41, and the third side wall 43 is disposed more inward than the second side wall 42.

[0047] 2 to 4, the bobbin 121 fixes the distance between the first one-turn coil 31 and the second one-turn coil 32. The bobbin 121 also fixes the distance between the second one-turn coil 32 and the third one-turn coil 33.

[0048] As shown in FIG. 2, the first one-turn coil 31 is in contact with the first side wall 41, is disposed on the first flat surface 11 of the plate-like body 101, and has a shape formed by wrapping around a first strip-shaped conductor. The second one-turn coil 32 is in contact with the second side wall 42, is disposed on the second flat surface 12 of the first stage 111, and has a shape formed by wrapping around a second strip-shaped conductor. The second one-turn coil 32 is electrically connected to the first one-turn coil 31. Also, as shown in FIG. 3, the third one-turn coil 33 is in contact with the third side wall 43, is disposed on the third flat surface 13 of the second stage 112, and has a shape formed by wrapping around a third strip-shaped conductor. The third one-turn coil 33 is electrically connected to the second one-turn coil 32.

[0049] 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. Also, as shown in FIGS. 1 and 3, the wide surface 23 of the third strip conductor is parallel to the third plane 13.

[0050] 4, an iron core 51 is disposed inside the hole 131 of the bobbin 121. This forms a choke coil.

[0051] Each of the first one-turn coil 31, the second one-turn coil 32, and the third one-turn coil 33 has an adhesive (not shown) applied to at least a portion of the portion that comes into contact with the bobbin 121.

[0052] 2, one end of the first one-turn coil 31 and one end of the second one-turn coil 32 are electrically connected by a plate-shaped conductor 65 and screwed together with screws 81. The plate-shaped conductor 65 is preferably a copper plate with a plated surface. This allows the first one-turn coil 31, the second one-turn coil 32, and the third one-turn coil 33 to be fixed to the bobbin 121. 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.

[0053] 3, the other end of the second one-turn coil 32 and one end of the third one-turn coil 33 are electrically connected to a plate-shaped conductor 66 by 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, and 33 are preferably made of copper or a copper alloy and formed by stamping a copper or copper alloy plate.

[0054] In addition, in a plan view, the hole 131 of the bobbin 121 has a shape in which the curved portion in the longitudinal direction of an ellipse is straightened. Note that, although the hole 131 has such a shape in this embodiment, it is not limited to this, and the hole 131 of the bobbin 121 may have a circular, elliptical, or polygonal shape.

[0055] As described above, by making the shape of the hole 131 of the bobbin 121 circular, elliptical, a shape in which the curved portion in the longitudinal direction of the ellipse is straightened, or polygonal, the function as a choke coil can be fully exhibited.

[0056] According to this embodiment, the bobbin 121 includes a plate-like body 101 having a first flat surface 11, a first section 111 having a first side wall 41 wound around the first flat surface 11, a second flat surface 12 formed on the first side wall 41, and a second side wall 42 wound around the second flat surface 12. A first one-turn coil 31 having a shape obtained by winding a first strip-shaped conductor is in contact with the first side wall 41 and is disposed on the first flat surface 11 of the plate-like body 101, and a second one-turn coil 32 having a shape obtained by winding a second strip-shaped conductor is in contact with the second side wall 42 and is disposed on the second flat surface 12 of the first section 111. This allows the positions of the first and second one-turn coils 31 and 32 to be fixed. As a result, the first and second one-turn coils 31, 32 can be prevented from moving freely, the distance between the first one-turn coil 31 and the second one-turn coil 32 can be fixed, and insulation between the first one-turn coil 31 and the second one-turn coil 32 can be ensured (see Figures 1, 2, and 4).

[0057] In this embodiment, the third one-turn coil 33, which has a shape obtained by wrapping the third strip-shaped conductor around once, is in contact with the third sidewall 43 and is disposed on the third plane 13 of the second stage 112. 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).

[0058] According to this embodiment, adhesive is applied to at least a portion of the contact area between the first one-turn coil 31, the second one-turn coil 32, and the third one-turn coil 33 and the bobbin 121. This fixes the first one-turn coil 31, the second one-turn coil 32, and the third one-turn coil 33 to the bobbin 121. 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 (see FIGS. 1, 3, and 4).

[0059] 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 joining the plate-shaped conductors 65 together and fastening them with screws 81, which eliminates the need to fabricate a coil with a complex shape and makes it easier to fabricate the coils.

[0060] 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 fitting the plate-shaped conductor 66 together and fastening with screws 82, which eliminates the need to fabricate a coil with a complex shape and makes it easier to fabricate the coil.

[0061] 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.

[0062] (Second embodiment) FIG. 5 is a perspective view showing a state in which a coil in which a one-turn coil and a two-turn coil are connected by screws is arranged on a bobbin in a choke coil according to one embodiment of the present invention. The same parts as those in FIG. 3 are given the same reference numerals, and only the different parts will be described. FIG. 6 is a perspective view showing a state in which an iron core has been inserted inside the bobbin shown in FIG. 5 and parts other than the coil terminals have been stored. The same parts as in FIG. 4 are given the same reference numerals, and only the different parts will be explained.

[0063] As shown in FIGS. 5 and 6, 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 .

[0064] 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.

[0065] (Third embodiment) FIG. 7 is a perspective view showing a state in which a coil is arranged on a bobbin in a choke coil according to one embodiment of the present invention, with first to third one-turn coils each connected by welding. The same parts as in FIG. 3 are given the same reference numerals, and only the different parts will be described.

[0066] 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 through a plate-shaped conductor 65. The other end of the second one-turn coil 32 and one end of the third one-turn coil 33 are electrically connected by welding 72 through a plate-shaped conductor 66.

[0067] In this embodiment, the same effects as in the first embodiment can be obtained. Furthermore, in this embodiment, the first to third one-turn coils 31 to 33 are configured to be electrically connected to one another by welding, which eliminates the need to fabricate coils with complex shapes and makes it easier to fabricate the coils.

[0068] (Fourth embodiment) A bobbin according to one embodiment of the present invention will be described with reference to FIGS. 1, 2 and 3. FIG.

[0069] The bobbin 121 shown in FIG. 1 includes a plate-like body 101 having a first flat surface 11 and a hole 131, a first step 111 formed on the plate-like body 101, a second step 112 connected to the first step 111, and a third step 113 connected to the second step 112. The first step 111 has a first side wall 41 that runs around the hole 131 on the first flat surface 11 and a second flat surface 12 formed on the first side wall 41. The second step 112 has a second side wall 42 that runs around the second flat surface 12 parallel to the first flat surface 11, and a third flat surface 13 that is connected to the second side wall 42 and parallel to the second flat surface 12. A third side wall 43 is formed on the third flat surface 13 and runs around the hole 13.

[0070] In plan view, the second side wall 42 is located inside the first side wall 41, and the third side wall 43 is located inside the second side wall 42. The first side wall 41 contacts the first one-turn coil 31, which has a shape obtained by winding a first strip-shaped conductor, by placing the first one-turn coil 31 on the first flat surface 11 of the plate-shaped body 101. The second side wall 42 contacts the second one-turn coil 32, which has a shape obtained by winding a second strip-shaped conductor, by placing the second one-turn coil 32 on the second flat surface 12 of the first stage 111. The third side wall 43 contacts the third one-turn coil 33, which has a shape obtained by winding a third strip-shaped conductor, by placing the third one-turn coil 33 on the third flat surface 13 of the second stage 112. 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.

[0071] 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. The bobbin 121 is made of an insulating material, and the first flat surface 11 and first step 111 of the plate-like body 101 fix the distance between the first one-turn coil 31 and the second one-turn coil 32 (see FIGS. 1 and 2). The first step 111 and second step 112 fix the distance between the second one-turn coil 32 and the third one-turn coil 33 (see FIGS. 1 and 3).

[0072] According to this embodiment, the bobbin 121 includes a plate-like body 101 having a first flat surface 11 and a hole 131, a first sidewall 41 extending around the hole 131 on the first flat surface 11, a first stage 111 having a second flat surface 12 formed on the first sidewall 41, and a second sidewall 42 extending around the second flat surface 12. Therefore, by placing a first one-turn coil 31 having a shape obtained by wrapping a first strip-shaped conductor around the first flat surface 11 of the plate-like body 101, the first one-turn coil 31 can be brought into contact with the first sidewall 41, and by placing a second one-turn coil 32 having a shape obtained by wrapping a second strip-shaped conductor around the second flat surface 12 of the first stage 111, the second one-turn coil 32 can be brought into contact with the second sidewall 42. As a result, the first and second one-turn coils 31, 32 can be reliably positioned. (See Figures 1 and 2).

[0073] Furthermore, according to this embodiment, the bobbin 121 includes a second stage 112 having a third flat surface 13 connected to the second side wall 42 and parallel to the second flat surface 12, and a third side wall 43 wound around the third flat surface 13. Therefore, by placing the third one-turn coil 33, which has a shape similar to a wound third strip-shaped conductor, on the third flat surface 13 of the second stage 112, the third one-turn coil 33 can be brought into contact with the third side wall 43. As a result, the first to third one-turn coils 31 to 33 can be reliably positioned (see FIGS. 1 and 3).

[0074] (Fifth embodiment) A coil according to one aspect of the present invention will be described with reference to FIGS. 1 to 3 and 5 to 7. FIG.

[0075] The coil shown in FIG. 2 includes a first one-turn coil 31 and a second one-turn coil 32. The first one-turn coil 31 has a shape obtained by winding a first strip-shaped conductor around itself. The first one-turn coil 31 is disposed on the first plane 11 of the plate-shaped body 101, which has a hole 131 formed in the bobbin 121 made of an insulator, and is in contact with a first side wall 41 that winds around the hole 131 on the first plane 11. The first one-turn coil 31 is electrically connected to the second one-turn coil 32. The second one-turn coil 32 has a shape obtained by winding a second strip-shaped conductor around itself. The second one-turn coil 32 is disposed on the second plane 12 of the first stage 111 of the bobbin 121, and is in contact with a second side wall 42 that winds around the second plane 12.

[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 the shape of a third strip-shaped conductor wound around one end, and is disposed on the third flat surface 13 of the second stage 112 of the bobbin 121, and is in contact with the third side wall 43 wound around the third flat surface 13.

[0077] According to this embodiment, the first one-turn coil 31 is electrically connected to the second one-turn coil 32, and the first one-turn coil 31 is in contact with the first side wall 41 that wraps around the hole 131 on the first flat surface 11 of the plate-shaped body 101 of the bobbin 121, and the second one-turn coil 32 is in contact with the second side wall 42 that wraps around the second flat surface 12 of the first stage 111 of the bobbin 121. This makes it possible to reliably fix the positions of the first and second one-turn coils 31, 32 in fixed positions (see FIGS. 1 and 2).

[0078] Furthermore, according to this embodiment, the second one-turn coil 32 is electrically connected to the third one-turn coil 33, and the third one-turn coil 33 is in contact with the third side wall 43 that is wound around the third flat surface 13 of the second stage 112 of the bobbin 121. This ensures that the first to third one-turn coils 31 to 33 are positioned in fixed positions (see FIGS. 1 and 3).

[0079] (Sixth embodiment) A coil fixed to a bobbin in a choke coil according to one embodiment of the present invention will be described with reference to FIGS.

[0080] The coil fixed to the bobbin 121 shown in Figures 1 and 2 includes a bobbin 121 having a plate-like body 101 having a first plane 11, a first section 111 having a first side wall 41 and a second plane 12, a second side wall 42 wound around the second plane 12, a second section 112 having a third plane 13 parallel to the second plane 12, and a third side wall 43 wound around the third plane 13, a first one-turn coil 31 in contact with the first side wall 41 and having a shape formed by winding around the first strip-shaped conductor, a second one-turn coil 32 in contact with the second side wall 42 and having a shape formed by winding around the second strip-shaped conductor, and a third one-turn coil 33 in contact with the third side wall 43 and having a shape formed by winding around the third strip-shaped conductor.

[0081] The bobbin 121 is made of an insulator and fixes 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. As shown in Figures 1 and 3, the wide surface 23 of the third strip conductor is parallel to the third plane 13.

[0082] According to this embodiment, the bobbin 121 includes a plate-like body 101 having a first flat surface 11, a first stage 111 having a first side wall 41 wound around the first flat surface 11, a second flat surface 12 formed on the first side wall 41, and a second side wall 42 wound around the second flat surface 12. A first one-turn coil 31 having a shape obtained by winding a first strip-shaped conductor is in contact with the first side wall 41 and is disposed on the first flat surface 11 of the plate-like body 101, and a second one-turn coil 32 having a shape obtained by winding a second strip-shaped conductor is in contact with the second side wall 42 and is disposed on the second flat surface 12 of the first stage 111. This allows the first and second one-turn coils 31, 32 to be reliably positioned (see FIGS. 1, 2, and 4).

[0083] Furthermore, according to this embodiment, the third one-turn coil 33, which has a shape obtained by winding the third strip-shaped conductor, is in contact with the third sidewall 43 and is disposed on the third plane 13 of the second stage 112. This ensures that the third one-turn coil 33 is positioned in a fixed position (see FIGS. 1 and 3).

[0084] The present invention can also be implemented by appropriately combining the first to sixth embodiments described above. [Explanation of symbols]

[0085] 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 First side wall 42 Second Side Wall 43 Third Side Wall 51 Iron Core 65, 66 Plate conductor 71, 72 Welding 81, 82 screw fastening 91 Bending 101 Plate-shaped body 111 Stage 1 112 2nd stage 113 3rd stage 121 Bobbin 131 holes

Claims

1. a bobbin having a plate-like body having a first plane, a first side wall wound around the first plane, a first step having a second plane formed on the first side wall, and a second side wall wound around the second plane; a first one-turn coil in contact with the first side wall, disposed on the first plane of the plate-like body, and having a shape obtained by winding a first strip-shaped conductor around once; a second one-turn coil in contact with the second sidewall, disposed on the second plane of the first stage, electrically connected to the first one-turn coil, and having a shape obtained by winding a second strip-shaped conductor around once; A hole is provided in the bobbin, and an iron core is disposed inside the hole; and the second side wall is disposed more inward than the first side wall in a plan view, the first plane is parallel to the second plane; the bobbin fixes the 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 bobbin is made of an insulator.

2. In claim 1, the bobbin includes a second section having a third plane connected to the second side wall and parallel to the second plane, and a third side wall extending around the third plane; the third side wall is disposed more inward than the second side wall in a plan view, a third one-turn coil in contact with the third sidewall, disposed on the third plane of the second stage, electrically connected to the second one-turn coil, and having a shape obtained by winding a third strip-shaped conductor around once; the bobbin fixes the 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 first one-turn coil, the second one-turn coil, and the third one-turn coil that contact the bobbin.

4. In claim 2 or 3, 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 together plate-shaped conductors.

5. In claim 2, 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, 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 together plate-shaped conductors.

7. In claim 2 or 3, A choke coil characterized in that, in plan view, the hole of the bobbin has a circular shape, an elliptical shape, a shape obtained by straightening a curved portion of an ellipse in the longitudinal direction, or a polygonal shape.

8. a plate-like body having a first plane and a hole; a first step having a first sidewall surrounding the hole on the first plane and a second plane formed on the first sidewall; a second sidewall extending around the second plane; and the first plane is parallel to the second plane; the second side wall is disposed more inward than the first side wall in a plan view, the first side wall is configured to contact a first one-turn coil having a shape obtained by wrapping a first strip-shaped conductor around the first side wall by disposing the first one-turn coil on the first plane of the plate-shaped body, and the second side wall is electrically connected to the first one-turn coil, and a second one-turn coil having a shape obtained by winding a second strip-shaped conductor around the second side wall is disposed on the second plane of the first stage, thereby bringing the second one-turn coil into contact with the second side wall; 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 bobbin characterized in that the material is made of an insulating material.

9. In claim 8, a second step having a third plane connected to the second sidewall and parallel to the second plane; a third side wall extending around the third plane; and the third side wall is disposed more inward than the second side wall in a plan view, the third side wall is electrically connected to the second one-turn coil, and the third one-turn coil has a shape obtained by winding a third strip-shaped conductor around the third side wall, and the third one-turn coil is placed on the third plane of the second stage, thereby bringing the third one-turn coil into contact with the third side wall; a third strip-shaped conductor having a wide surface parallel to the third plane;

10. a first one-turn coil having a shape obtained by wrapping a first strip-shaped conductor around the bobbin, the first one-turn coil being disposed on a first plane of a plate-like body having a hole formed therein and made of an insulator, the first one-turn coil being adapted to come into contact with a first side wall that wraps around the hole on the first plane; a second one-turn coil electrically connected to the first one-turn coil, having a shape of a second band-shaped conductor wound around one turn, and disposed on a second flat surface of the first stage of the bobbin, for contacting the second side wall wound around the second flat surface; and the second side wall is disposed more inward than the first side wall in a plan view, the first plane is parallel to the second plane; a wide surface of the first strip conductor is parallel to the first plane; A coil characterized in that the wide surface of the second strip conductor is parallel to the second plane.

11. In claim 10, a third one-turn coil electrically connected to the second one-turn coil, having a shape of a third band-shaped conductor wound around one turn, and disposed on a third flat surface of the second stage of the bobbin, for contacting a third side wall wound around the third flat surface; the second step has the third plane connected to the second sidewall and parallel to the second plane; the third side wall is disposed more inward than the second side wall in a plan view, A coil characterized in that the wide surface of the third strip conductor is parallel to the third plane.

12. In claim 10 or 11, 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 together plate-shaped conductors.

13. In claim 11, The other end of the second one-turn coil and one end of the third one-turn coil are electrically connected by bending.

14. In claim 11, 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 together plate-shaped conductors.

15. a bobbin having a plate-like body having a first plane, a first side wall wound around the first plane, a first step having a second plane formed on the first side wall, and a second side wall wound around the second plane; a first one-turn coil in contact with the first side wall, disposed on the first plane of the plate-like body, and having a shape obtained by winding a first strip-shaped conductor around once; a second one-turn coil in contact with the second sidewall, disposed on the second plane of the first stage, electrically connected to the first one-turn coil, and having a shape obtained by winding a second strip-shaped conductor around once; and the second side wall is disposed more inward than the first side wall in a plan view, the first plane is parallel to the second plane; the bobbin fixes the 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 coil is characterized in that the bobbin is made of an insulator.

16. In claim 15, the bobbin includes a second section having a third plane connected to the second side wall and parallel to the second plane, and a third side wall extending around the third plane; the third side wall is disposed more inward than the second side wall in a plan view, a third one-turn coil in contact with the third sidewall, disposed on the third plane of the second stage, electrically connected to the second one-turn coil, and having a shape obtained by winding a third strip-shaped conductor around once; the bobbin fixes the 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.

17. In claim 16, A coil characterized in that an adhesive is disposed on at least a portion of the first one-turn coil, the second one-turn coil, and the third one-turn coil that contact the bobbin.

Images