CN110098037B - Coil device - Google Patents

Abstract

The invention provides a coil device capable of realizing miniaturization. The transformer (10) has a bobbin (20), a first coil (35) wound around the bobbin (20) with a first winding (37), and a second coil (38) wound around the bobbin (20) with a second winding (38) disposed at a position different from the first coil (35) in the winding axis direction. One first lead part (37 a) of a pair of first lead parts (37 a, 37 b) of the first winding wire (37) is led out towards the vicinity of the first end part of one side of the terminal block (22), and is raised towards the first end side terminal (60 a) of the vicinity of the first end part of one side of the terminal block (22). One second lead part (38 a) of a pair of second lead parts (38 a, 38 b) of the second winding wire (38) is led out toward the vicinity of the second end part of the other side of the terminal block (22), and is raised toward a second end side terminal (60 c) of the vicinity of the second end part of the other side of the terminal block (22).

Description

Coil device

Technical Field

The present invention relates to a coil device suitably used as, for example, a transformer or the like.

Background

Patent document 1 discloses a coil device (reactor device) in which terminals for connecting a pair of lead portions of a wire are provided on a terminal block of a bobbin. However, in the coil device described in patent document 1, terminal blocks are provided on both sides of the core. Accordingly, the size of the entire device is increased by the installation space of each terminal block, and it is difficult to achieve miniaturization of the coil device.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication No. 2014-36194

Disclosure of Invention

Technical problem to be solved by the invention

The present invention has been made in view of such a situation, and an object thereof is to provide a coil device that can be miniaturized.

Technical scheme for solving problems

In order to achieve the above object, the present invention provides a coil device comprising:

a skeleton;

a first coil part formed by winding a first winding around the bobbin;

a second coil part which is arranged at a position different from the first coil part in the winding axis direction and is formed by winding a second winding wire around the framework,

one of the pair of first lead portions of the first wire is led out toward the vicinity of one end of the terminal block and is raised toward the first end-side lead mounting portion in the vicinity of one end of the terminal block,

one of the pair of second lead portions of the second wire is led out toward the vicinity of the other end of the terminal block, and is raised toward the second end-side lead mounting portion in the vicinity of the other end of the terminal block.

In the coil device of the present invention, one of the pair of first lead portions of the first wire is led out toward the vicinity of one end portion of the terminal block, and is raised toward the first end-side lead mounting portion in the vicinity of one end portion of the terminal block. That is, the first lead portion stands up toward the terminal near the one end of the terminal block in a state where the first lead portion is drawn out by a sufficient distance near the one end of the terminal block, and is less likely to be loosened or bent when the first lead portion is fixed. Therefore, the first lead portion can be compactly erected toward the lead mounting portion near the end portion on the side of the terminal block, and the coil device can be miniaturized. The same effect is obtained also for the second lead portion.

In addition, a space (inner lead mounting portion) in which a terminal for connecting the other first lead portion and the other second lead portion can be provided is formed between the first end-side lead mounting portion and the second end-side lead mounting portion. Since the terminals are provided in the space, the pair of first lead portions and the pair of second lead portions can be fixed to one terminal block on one side, and unlike the conventional case, it is not necessary to provide terminal blocks on both sides of the frame. Therefore, in the coil device of the present invention, the overall size of the device can be reduced, and miniaturization can be achieved.

In the present invention, since the terminal block is provided on the single side of the core, when the coil device and other electronic components are connected, the electronic component group for the primary coil side and the secondary coil side can be arranged on the single side of the core. Therefore, the degree of freedom in arrangement of the electronic component groups constituting the electronic circuit can be increased, and the space in which the electronic component groups are arranged can be reduced.

Further, since the terminal block is provided on one side of the core, the coil device can be disposed on one side close to the space where the electronic component group is provided. As a result, the mechanism for cooling the coil device can be easily mounted, and the cooling efficiency of the coil device can be improved.

The other one of the pair of first lead portions may be raised toward a first inner lead mounting portion located between the first end side lead mounting portion and the second end side lead mounting portion of the terminal block, and the other one of the pair of second lead portions may be raised toward a second inner lead mounting portion located between the first end side lead mounting portion and the second end side lead mounting portion of the terminal block.

By forming such a structure, it is easy to mount a pair of first lead portions on the first end side lead mounting portion and the first inner side lead mounting portion, and it is easy to mount a pair of second lead portions on the second end side lead mounting portion and the second inner side lead mounting portion. Therefore, the pair of first lead portions and the pair of second lead portions can be fixed to one terminal block, the size of the entire device can be reduced, and the coil device can be miniaturized.

Preferably, the first end terminal attached to the first end lead attachment portion or the second end terminal attached to the second end lead attachment portion has a lead connection portion to which the first lead portion or the second lead portion is connected, and an external connection portion connected to the circuit board, and the external connection portion is disposed closer to the frame than the lead connection portion. By forming such a structure, the lateral width (width in the direction perpendicular to the winding axis direction) of the coil device can be reduced as compared with the case where the lead connection portion is arranged closer to the bobbin than the external connection portion, and miniaturization of the coil device can be effectively achieved.

Preferably, the first end terminal and the second end terminal are provided on the terminal block such that the external connection portions of the first end terminal and the second end terminal face in a direction parallel to a winding axis direction. In this way, by providing the first end terminal and the second end terminal on the terminal block with the external connection portion oriented in the direction parallel to the winding axis direction, the lateral width of the coil device can be reduced, and miniaturization of the coil device can be effectively achieved.

Further, by providing the first end terminal and the second end terminal on the terminal block so that the external connection portions are all oriented in the same direction (direction parallel to the winding axis direction), when the circuit board or the like is connected to the external connection portions, all the external connection portions can be connected to the circuit board or the like at once.

An insulating plate may be provided on the terminal block so as to separate the other first lead portion and the other second lead portion. By forming such a structure, a sufficient space distance between the first lead portion and the second lead portion can be ensured, and insulation between the first lead portion and the second lead portion can be formed well.

Preferably, the first end side lead mounting portion and the first inner lead mounting portion are adjacent, and the second end side lead mounting portion and the second inner lead mounting portion are adjacent. By forming such a structure, the number of adjacent portions of the first lead portion and the second lead portion can be reduced. Therefore, it is not necessary to secure insulation distances between the first lead portion and the second lead portion at a plurality of positions, and miniaturization of the coil device can be effectively achieved.

In addition, it is easy to orderly arrange an external electronic circuit connected to the first end side terminal and the first inner side terminal, and an external electronic circuit connected to the second end side terminal and the second inner side terminal.

Preferably, an insulating tube is attached to a rising portion of the first lead portion or the second lead portion rising toward the first inner lead attachment portion or the second inner lead attachment portion. By forming such a structure, insulation of the first lead portion and the second lead portion can be ensured by the insulating tube. Therefore, the terminal block can be prevented from being enlarged by ensuring the insulation distance, and the coil device can be effectively miniaturized.

Preferably, the skeleton is formed with:

A winding tube section around which the first winding wire and the second winding wire are wound;

a plurality of flange parts formed on the outer circumference of the winding drum part at positions different from each other in the winding axis direction,

an extending flange portion is formed on a part of the flange portion in the circumferential direction of the terminal block side,

the extending flange portion is formed with an engaging portion with which the one first lead portion or the one second lead portion is engaged.

By forming such a structure, when one of the first lead portions and one of the second lead portions are erected on the first end side terminal or the second end side terminal provided on the terminal block, the first lead portion and the second lead portion can be easily erected.

Drawings

Fig. 1 is a perspective view of a coil device according to a first embodiment of the present invention.

Fig. 2A is an exploded perspective view of the coil device.

Fig. 2B is a perspective view of the first coil portion and the second coil portion of the coil device.

Fig. 3A is an enlarged perspective view of the skeleton shown in fig. 2A.

Fig. 3B is an enlarged perspective view of the skeleton from another angle.

Fig. 4 is a sectional view taken along the IV-IV line of the coil apparatus shown in fig. 1.

Fig. 5 is a perspective view of a coil device according to a second embodiment of the present invention.

Fig. 6A is an exploded perspective view of the coil device.

Fig. 6B is a perspective view of the first coil portion and the second coil portion of the coil device.

Fig. 7 is an enlarged perspective view of the skeleton shown in fig. 6A.

Fig. 8 is a sectional view taken along line VIII-VIII of the coil apparatus.

Detailed Description

The present invention will be described below based on embodiments shown in the drawings.

First embodiment

The transformer 10 as the coil device of the present embodiment shown in fig. 1 is used, for example, in an EV (Electric Vehicle), a PHV (Plug-in Hybrid Vehicle: plug-in hybrid Vehicle), an in-Vehicle charger for commuting (vehicles), a power supply circuit for household or industrial electrical equipment, a power supply circuit for computer equipment, or the like. The transformer 10 includes a bobbin 20, magnetic cores (split cores) 40a and 40b, and a cover 50.

In the drawings, the X-axis, the Y-axis, and the Z-axis are perpendicular to each other, the X-axis corresponds to the longitudinal direction of the skeleton 20, and the Y-axis coincides with the direction perpendicular to the direction in which the pair of split cores 42a, 42a or the pair of split cores 42b, 42b are split. The Z axis corresponds to the height (thickness) direction of the transformer 10. In the present embodiment, the lower part of the transformer 10 in the Z-axis direction is the installation surface of the transformer.

As shown in fig. 2A, the frame 20 includes a frame body 24 and a terminal block 22 integrally formed with an upper portion of one end of the frame body 24 in the X-axis direction. The frame 20 is made of plastic such as PPS, PET, PBT, LCP, for example, but may be made of other insulating members.

The first coil portion 35 of the first wire 37 and the second coil portion 36 of the second wire 38 shown in fig. 2B are wound around the bobbin body 24. As shown in fig. 2A, the terminal block 22 is formed at an upper portion of one end of the skeleton main body 24 in the X-axis direction, and the convex portion 29 is formed at an upper portion of the other end.

First lead portions 37a and 37B of the first wire 37 and second lead portions 38a and 38B of the second wire 38 shown in fig. 2B are fixed to the terminal block 22. The detailed structures of the first lead portions 37a and 37b and the second lead portions 38a and 38b will be described later.

As shown in fig. 2A, a first end-side lead mounting portion 225a, a first inner lead mounting portion 225b, a second end-side lead mounting portion 225c, and a second inner lead mounting portion 225d are formed on the terminal block 22. Each of the lead portions 37a, 37B, 38a, 38B shown in fig. 2B is attached to each of the attachment portions 225a to 225d.

As shown in fig. 2A, the first end-side lead mounting portion 225a is formed near the first end portion in the Y-axis direction on one side of the terminal block 22. The second end-side lead mounting portion 225c is formed near the second end portion of the other side of the terminal block 22 in the Y-axis direction. The first and second inner lead mounting portions 225b and 225d are formed in a space between the first and second end-side lead mounting portions 225a and 225c of the terminal block 22.

Preferably, the first inner lead mounting portion 225b is formed adjacent to the first end lead mounting portion 225 d. The second inner lead mounting portion 225d is formed adjacent to the second end lead mounting portion 225 c.

In the present embodiment, the first end-side lead mounting portion 225a and the first inner lead mounting portion 225b are formed in a region on one side in the Y-axis direction of the terminal block 22, and the second end-side lead mounting portion 225c and the second inner lead mounting portion 225d are formed in a region on the other side in the Y-axis direction of the terminal block 22.

The one-side region is a region in which the terminal block 22 of the skeleton 20 is half of the left side of the terminal block 22 when viewed from the outside of the X axis. The other region is a region in which the terminal block 22 of the frame 20 is half of the right side of the terminal block 22 when viewed from the outside of the X axis.

The first end terminal 60a shown in fig. 2A is attached to the first end lead attachment portion 225a in the manner shown in fig. 1. The first inner terminal 60b shown in fig. 2A is mounted to the first inner lead mounting portion 225b in the manner shown in fig. 1. The second end terminal 60c shown in fig. 2A is mounted to the second end lead mounting portion 225c in the manner shown in fig. 1. The second inner terminal 60d shown in fig. 2A is mounted to the second inner lead mounting portion 225d in the manner shown in fig. 1.

As shown in fig. 2A, the first end terminal 60a and the first inner terminal 60b have the same structure, and the second end terminal 60c and the second inner terminal 60d have the same structure. As shown in fig. 2B, the first end terminal 60a and the first inner terminal 60B are formed to be slightly larger than the second end terminal 60c and the second inner terminal 60d, so that the first lead portions 37a and 37B having a larger wire diameter than the second lead portions 38a and 38B can be connected.

As shown in fig. 2A, the first end terminal 60a has a lead connection portion 61 to which the first lead portion 37a shown in fig. 2B is connected, and an external connection portion 62 to which the circuit board is connected. The second inner terminal 60b has a lead connection portion 61 to which the first lead portion 37b is connected, and an external connection portion 62 to which the circuit board is connected. The second end terminal 60c has a lead connection portion 61 to which the second lead portion 38a is connected, and an external connection portion 62 to which the circuit board is connected. The second inner terminal 60d has a lead connection portion 61 to which the second lead portion 38b is connected, and an external connection portion 62 to which the circuit board is connected.

As shown in fig. 1, in the present embodiment, the first end terminal 60a, the first inner terminal 60b, the second end terminal 60c, and the second inner terminal 60d are provided on the terminal block 22 such that the respective external connection portions 62 are arranged close to the skeleton main body 24.

In the present embodiment, the first end terminal 60a and the second end terminal 60c are provided on the terminal block 22 such that the external connection portions 62 of the first end terminal 60a and the second end terminal 60c face in a direction parallel to the winding axis direction.

As shown in fig. 3A, an insulating plate mounting groove 223 is formed in a substantially central portion of the terminal block 22. As shown in fig. 1, the insulating plate mounting groove 223 is fitted into the insulating plate 70 having a substantially T-shape shown in fig. 2A so as to separate the first lead portion 37b and the second lead portion 38 b.

As shown in fig. 3A, the terminal block 22 is formed with a first end side passage 221a, a first inner side passage 221b, a second end side passage 221c, and a second inner side passage 221d. The first end-side passage 221a is disposed adjacent to the first end-side lead attachment portion 225a on the first end side of the terminal block 22 in the Y-axis direction, and extends in the X-axis direction. The first end side passage 221a serves as a passage for the first lead portion 37a shown in fig. 2B to pass through.

As shown in fig. 3A, a first end side wall portion 222a is formed on the outer side of the first end side passage 221a in the Y-axis direction. By abutting the first lead portion 37a (more precisely, a first extraction body portion 37a3 described later) shown in fig. 2B against the first end side wall portion 222a, the first lead portion 37a can be prevented from being displaced to the outside in the Y-axis direction.

The second end-side passage 221c is disposed adjacent to the second end-side lead mounting portion 225c on the second end side of the terminal block 22 in the Y-axis direction, and serves as a passage for the second lead portion 38a shown in fig. 2B to pass through. As shown in fig. 3A, the second end side passage 221c is formed in a substantially L-shape along the periphery of the second end side lead mounting portion 225 c. More specifically, the second end-side passage 221c extends from the second end of the terminal block 22 in the Y-axis direction by a predetermined distance in the direction of the first end in the Y-axis direction, and then bends in the X-axis direction, and extends outside the frame 20 (on the opposite side of the side where the frame body 24 is formed along the X-axis) by a predetermined distance.

The first inner passage 221b is disposed between the first end passage 221a and the second end passage 221c close to the first end passage 221 a. The first inner passage 221B extends toward the X-axis direction, and serves as a passage for the first lead portion 37B shown in fig. 2B to pass through.

As shown in fig. 3A, the second inner passage 221d is arranged between the first end passage 221a and the second end passage 221c close to the second end passage 221 c. The second inner passage 221d serves as a passage for the second lead portion 38B shown in fig. 2B to pass through.

As shown in fig. 3A, a second inner wall portion 222d is formed on the outer side (opposite to the side on which the skeleton main body 24 is formed) of the second inner passage 221d in the X-axis direction. The second lead portion 38b passes through the second inner passage 221d so as to be wound around the second inner side wall portion 222d.

As shown in fig. 2A, in the present embodiment, the magnetic cores 40a, 40b may be separated into two split cores 42A, 42A and 42b, 42b having the same shape, respectively. In the present embodiment, the split cores 42a, 42b, and 42b have identical shapes, and each has an E-shaped cross section in the Z-Y cross section, thereby forming a so-called E-core. The other pair of split cores 42b, 42b disposed at the lower portion in the Z-axis direction also has a cross-sectional E-shape in the Z-Y cross section, and constitutes a so-called E-core.

Each of the split cores 42a disposed on the upper side in the Z-axis direction has a base 44a extending in the Y-axis direction, and a pair of center leg portions 46a and side leg portions 48a protruding from both ends of the base 44a in the Y-axis direction in the Z-axis direction. Each split core 42b disposed on the lower side in the Z-axis direction has a base 44b extending in the Y-axis direction, and a pair of center leg portions 46b and side leg portions 48b protruding in the Z-axis direction from both ends of the base 44b in the Y-axis direction.

The outer surfaces of the base portions 44a and 44b are brought into contact with the inner surface of the terminal block 22 formed on one end upper portion of the frame body 24 (the center side in the X-axis direction of the frame 20) and the inner surface of the convex portion 29 formed on the other end upper portion of the frame body 24, whereby positional displacement of the magnetic cores 40a and 40b in the X-axis direction or the Y-axis direction can be prevented.

The pair of centering legs 46a are inserted into the core leg through-holes 26 of the frame 20 from above in the Z-axis direction. Similarly, the pair of center leg portions 46b are inserted into the core leg through-holes 26 of the skeleton 20 from below in the Z-axis direction, and the distal ends of the center leg portions 46b are configured to contact the distal ends of the through-holes 26 or face the distal ends of the center leg portions 46a with a predetermined gap therebetween.

On the inner peripheral surface of the winding tube 28 constituting the through hole 26, a separation convex portion 27 (see fig. 2A) is formed at a position opposed to each other in the X-axis direction along the Z-axis direction. The separation convex portion 27 is inserted between the middle leg portions 42a, 42a and also inserted between the middle leg portions 42b, and the middle leg portions 42a, 42a or the middle leg portions 42b, 42b are configured to face each other with a predetermined gap therebetween in the through hole 26, and are not in contact with each other. The predetermined gap can be adjusted by the thickness of the separation convex portion 27 in the Y-axis direction.

The middle leg portions 42a, 42a or the middle leg portions 42b, 42b each have an elliptic cylindrical shape long in the X-axis direction in a combined state so as to conform to the shape of the inner peripheral surface of the through hole 26, and the shape thereof is not particularly limited, and may be changed in accordance with the shape of the through hole 26. The side leg portions 48a and 48b have an inner concave curved surface shape conforming to the outer peripheral surface shape of the cover main body 52 of the cover 50, and have a plane parallel to the X-Z plane on the outer surface thereof. In the present embodiment, the material of each of the split cores 42a and 42b is exemplified by a soft magnetic material such as a metal or ferrite, but is not particularly limited.

The cover main body 52 of the cover 50 has a shape covering the outer periphery of the skeleton main body 24. Locking pieces 54 bent in a substantially vertical direction from the cover main body 52 toward the frame main body 24 are integrally formed at both ends of the cover main body 52 in the Z-axis direction. A pair of locking pieces 54 formed on both sides of the cover main body 52 in the Z-axis direction are attached so as to sandwich the upper and lower surfaces of the frame main body 24 in the Z-axis direction, and are disposed in the step portion 25 formed on the upper surface of the frame main body 24.

Further, side leg guide pieces 56 extending in the Z-axis direction are integrally formed on both outer surfaces of the cover main body 52 in the X-axis direction. In the example shown in fig. 1, the side leg guide 56 may be in contact with the outer surfaces of the base portions 44a and 44b on the outer sides in the X-axis direction, or may be in contact with the outer surfaces of the side leg portions 48a and 48b on the outer sides in the X-axis direction. The inner surfaces of the side legs 48a, 48b contact the outer surface of the cover main body 52 located between the pair of side leg guide pieces 56, and movement of the side legs 48a, 48b in the X-axis direction is restricted by the pair of side leg guide pieces 56.

The cover 50 is made of the same plastic insulating material as the frame 20.

As shown in fig. 3A and 4, end bulkhead flanges 31 and 32 are integrally formed at both ends in the Z-axis direction of the winding tube portion 28 of the bobbin 20 of the transformer 10 of the present embodiment so as to extend outward in the radial direction and substantially parallel to the X-Y plane. The first coil portion 35 and the second coil portion 36 are disposed at different positions in the Z-axis direction (winding axis direction) in the winding tube portion 28 located between the end bulkhead flanges 31 and 32 in the Z-axis direction. A first wire 37 constituting one of the primary coil and the secondary coil is wound around the first coil portion 35, and a second wire 38 constituting the other of the primary coil and the secondary coil is wound around the second coil portion 36.

In the present embodiment, the insulating partition wall flange 30, which is substantially parallel to the X-Y plane, is formed on the outer periphery of the winding drum portion 28 located between the first coil portion 35 and the second coil portion 36. A winding partition flange 34 separating winding portions adjacent to each other along a winding axis (Z axis) of the first winding 37 for each of the sections S1a, S2a is formed on the first coil portion 35.

In the present embodiment, as well, the winding partition flange 33 separating the winding portions adjacent to each other along the winding axis (Z axis) of the second winding 38 for each of the sections S1, S2 is formed on the second winding portion 36, similarly to the first winding portion 35. As shown in fig. 3B, at least one connection groove 33a, 34a connecting adjacent sections S1, S2 or S1a, S2a is formed in each of the winding-bulkhead flanges 33 and 34.

The winding partition flanges 33 and 34 have connection grooves 33a and 34a formed on the opposite side of the X-axis direction to the side on which the terminal block 22 is disposed. These connecting grooves 33a, 34a are formed in a part of the circumferential direction of the respective bulkhead flanges 33 and 34 to a depth reaching the outer peripheral wall of the winding drum portion 28.

As shown in fig. 4, in the second coil portion 36, the second winding wire 38 is wound around the sections S1, S2 separated in the Z-axis direction by the partition flanges 30, 33, 31, and the wound portions of the separable winding are wound around each other for each section S1, S2. In the present embodiment, the division width T1 along the X axis of each of the divisions S1, S2 is set to be a width that enters only one winding 38. However, in the present embodiment, the division width T1 may be set to be equal to or larger than the width of the winding 38. In the present embodiment, the division widths T1 are preferably identical, but may be slightly different.

In the first coil portion 35, as in the second winding tube portion 36, the first winding wire 37 is wound around the sections S1a, S2a separated in the Z-axis direction by the partition flanges 30, 34, 32, and the winding portions are wound separately for each section S1a, S2 a. In the present embodiment, the division width T2 along the X axis of each of the divisions S1a, S2a is set to be a width into which only one wire 37 enters. The division width T1 may be the same as the division width T2, with respect to the wire diameter of the wire 37.

The height H1 of the partition flanges 30 to 34 is set to be equal to or greater than 1 (1 layer or more) of the winding 37 or 38, and in the present embodiment, it is preferable to be set to be a height at which 2 to 4 layers of the winding can be wound. The height H1 of each of the partition wall flanges 30 to 34 is preferably identical, but may be different.

As shown in fig. 3A, the extension flange portion 30c is formed at a part of the insulating partition flange 30 in the circumferential direction on the terminal block 22 side. The extending flange portion 30c protrudes outward of the insulating partition flange 30 and extends to the vicinity of the outer end portion of the terminal block 22 in the X-axis direction. A shallow lead groove 30d for guiding the second lead portion 38B shown in fig. 2B to the upper side in the Z-axis direction is formed in the Y-axis direction central portion of the extension flange portion 30 c. Further, an engagement portion 30e, which engages with the second lead portion 38a shown in fig. 2B, is formed at the second end portion in the Y-axis direction on the other side of the extension flange portion 30 c.

As shown in fig. 3A, the extension flange portion 33c is formed at a part of the circumferential direction of the winding bulkhead flange 33 on the terminal block 22 side. A lead groove 33d for guiding the second lead portion 38B shown in fig. 2B to the upper side in the Z-axis direction is formed in the extension flange portion 33c.

As shown in fig. 1 and 2B, in the present embodiment, one first lead portion 37a of the pair of first lead portions 37a, 37B of the first wire 37 is led out toward the vicinity of the first end portion in the Y-axis direction on one side of the terminal block 22, and is raised toward the first end side terminal 60 a.

As shown in fig. 2B, the first lead portion 37a has a first end-side lead portion 37a1, a rising portion 37a2, and a lead body portion 37a3. The first end-side lead-out portion 37a1 is led out from the section S1a shown in fig. 4 to the vicinity of the first end portion in the Y-axis direction on the side of the terminal block 22. The rising portion 37a2 rises in a direction parallel to the winding axis direction (Z-axis direction). The extraction body 37a3 is extracted to the outside of the frame 20 (the side opposite to the side along which the X-axis frame body 24 is formed) through the first end-side passage 221a shown in fig. 3A. As shown in fig. 1, one end of the lead body 37a3 is connected to the first end terminal 60 a.

As shown in fig. 1 and 2B, the other one of the pair of first lead portions 37a and 37B is erected toward the first inner terminal 60B located between the first end terminal 60a and the second end terminal 60c of the terminal block 22.

As shown in fig. 2B, the first lead portion 37B includes a rising portion 37B2 and a lead-out main body portion 37B3. The rising portion 37b2 rises from the section S2a shown in fig. 4 in a direction parallel to the winding axis direction. The extraction body 37b3 is extracted to the outside of the frame 20 (the side opposite to the side along which the X-axis frame body 24 is formed) through the first inner passage 221b shown in fig. 3A. One end of the lead body 37b3 is connected to the first inner terminal 60b as shown in fig. 1.

Further, the second lead portion 38a of one of the pair of second lead portions 38a, 38b of the second wire 38 is led out toward the vicinity of the second end portion of the other side of the terminal block 22 in the Y-axis direction, and is raised toward the second end-side terminal 60c in the vicinity of the second end portion.

As shown in fig. 2B, the second lead portion 38a has a second end-side lead portion 38a1, a rising portion 38a2, and a lead body portion 38a3. The second end-side lead-out portion 38a1 is led out from the section S2 shown in fig. 4 to the vicinity of the second end portion on the other side of the terminal block 22. The rising portion 38a2 rises in a direction parallel to the winding axis direction. The extraction body portion 38a3 is extracted to the outside of the frame 20 (opposite to the side where the frame body 24 is formed along the X-axis) through a second end side passage 221c shown in fig. 3A. One end of the lead body portion 38a3 is connected to the second end terminal 60c as shown in fig. 1.

The other second lead portion 38b of the pair of second lead portions 38a, 38b is erected toward the second inner terminal 60d located between the first end side terminal 60a and the second end side terminal 60c of the terminal block 22.

As shown in fig. 2B, the second lead portion 38B includes a rising portion 38B2 and a lead-out main body portion 38B3. The rising portion 38b2 rises from the section S1 shown in fig. 4 in a direction parallel to the winding axis direction. The extraction body portion 38b3 is extracted to the outside of the skeleton 20 (the side opposite to the side along which the X-axis skeleton body 24 is formed) through a second inner passage 221d shown in fig. 3A. One end of the lead body portion 38b3 is connected to the first inner terminal 60d as shown in fig. 1.

As shown in fig. 2B, in the present embodiment, the insulating tube is attached to the rising portion 38B2 of the second lead portion 38B rising toward the second inner terminal 60d shown in fig. 1. As in the illustrated example, an insulating tube may be attached to the first end-side lead portion 37a1 of the first lead portion 37a facing the rising portion 38b2 of the second lead portion 38 b.

In the present embodiment, the first winding wire 37 is α -wound in the first coil portion 35 by the connection groove 34a formed in the winding partition flange 34. The second winding wire 38 is also α -wound around the second coil portion 36 by the connection groove 33a formed in the winding partition flange 33.

In the manufacture of the transformer 10, first, the bobbin 20, the first winding 37, the second winding 38, the cover 50, and the magnetic cores (split cores) 40a and 40b shown in fig. 3A are provided. The first end terminal 60a, the first inner terminal 60b, the second end terminal 60c, and the second inner terminal 60d are insert-molded or bonded to the terminal block 22 of the frame 20.

Next, α winding will be described. For example, as shown in fig. 4, the second wire 38 is wound between the partition flanges 31, 33, 30, and first, the central portion of the wire 38 located substantially at the center between the lead portions 38a, 38B is led to the connection groove 33a shown in fig. 3B.

Then, a part of the second winding wire 38 close to the second lead portion 38a is wound around the outer periphery of the second coil portion 36 in a plurality of layers counterclockwise in the region S1 shown in fig. 4. Meanwhile, the other portion of the second winding wire 38 close to the second lead portion 38b side is wound around the outer periphery of the second coil portion 36 in multiple layers in the opposite direction (or may be the same direction) of the winding direction of the section S1 inside the section S2.

Similarly, the first coil portion 35 may be α -wound by using a different first winding wire 37. These operations may also be performed using an automatic winder. The windings 37 and 38 may be formed of a single wire or may be formed of twisted wires, and are preferably formed of insulated coated wires. The second wire 38 may be the same as or different from the first wire 37. In the present embodiment, the outer diameter of the first winding wire 37 is larger than the outer diameter of the second winding wire 38, and is preferably, for example, from Φ1.0 to Φ3.0mm.

After the windings 37 and 38 are wound around the frame 20, as shown in fig. 1 and 2B, the first end-side lead portion 37a1 of the first lead portion 37a is led out from the section S1a shown in fig. 4 toward the vicinity of the end portion on the side of the terminal block 22, and is bent in the Z-axis direction. Then, the rising portion 37a2 is raised toward the first end terminal 60a near the end portion of the terminal block 22, and is bent in the X-axis direction so as to pass through the first end passage 221a shown in fig. 3A. The extraction body 37a3 is extracted toward one end in the X-axis direction, and one end of the extraction body 37a3 is connected to the lead connection portion 61 of the first end terminal 60 a.

Then, the rising portion 37b2 of the first lead portion 37b is raised from the section S2a in the Z-axis direction, and is bent in the Y-axis direction and the X-axis direction so as to pass through the first inner passage 221b shown in fig. 3A. The extraction body 37b3 is extracted toward one end in the X-axis direction, and one end of the extraction body 37b3 is connected to the lead connection portion 61 of the first end terminal 60 b.

Next, the second end-side lead portion 38a1 of the second lead portion 38a is led out from the section S2 shown in fig. 4 toward the vicinity of the other end portion of the terminal block 22, and is bent in the Z-axis direction. The rising portion 38a2 is then raised by the second end-side terminal 60c toward the vicinity of the other end of the terminal block 22, and is bent in the Y-axis direction and the X-axis direction so as to pass through the second end-side passage 221 c. The extraction body portion 38a3 is extracted toward one end in the X-axis direction, and one end of the extraction body portion 38a3 is connected to the lead connection portion 61 of the second end terminal 60 c.

Then, the rising portion 38b2 of the second lead portion 38b is raised from the section S1 in the Z-axis direction, and is bent in the X-axis direction and the Y-axis direction so as to pass through the second inner passage 221 d. The extraction body portion 38b3 is extracted outward in the X-axis direction, and one end of the extraction body portion 38b3 is connected to the lead connection portion 61 of the second end terminal 60 d.

Thereafter, as shown in fig. 2A, a pair of covers 50 is attached to the frame 20. Then, the middle leg 46a of the pair of split cores 42a, 42a separated in the X-axis direction and the middle leg 46b of the pair of split cores 42b, 42b separated in the X-axis direction are inserted from both sides in the X-axis direction of the through hole 26 for core pins.

As a result, as shown in fig. 4, the tips of the legs 46a, 46b in the Z-axis direction abut against each other inside the through hole 26. The front ends of the legs 46a, 46b in the X-axis direction may be in direct contact with each other or may be opposed to each other with a predetermined gap. In any case, the legs 46a, 46b of the separable magnetic core are inserted into the through-hole 26, and a magnetic circuit is formed. The split cores 42a and 42b may be fixed to the frame 20 with an adhesive.

In the transformer 10 of the present embodiment, one first lead portion 37a of the pair of first lead portions 37a, 37b of the first winding wire 37 is led out toward the vicinity of one end portion of the terminal block 22, and is raised toward the first end-side terminal 60a in the vicinity of one end portion of the terminal block 22. That is, the first lead portion 37a is raised toward the terminal 60a near the one end of the terminal block 22 in a state of being drawn out to the near the one end of the terminal block 22 by a sufficient distance as much as possible, and therefore, when the first lead portion 37a is raised, looseness and bending are less likely to occur. Therefore, the first lead portion 37a can be compactly erected toward the terminal 60a near the end portion on the side of the terminal block 22, and the transformer 10 can be miniaturized. The same effect is obtained also for the second lead portion 38 a.

A space for providing terminals 60b and 60d for connecting the other first lead portion 37b and the other second lead portion 38b is formed between the first end terminal 60a and the second end terminal 60 c. By providing the terminals 60b and 60d in this space, the pair of first lead portions 37a and 37b and the pair of second lead portions 38a and 38b can be fixed to one terminal block 22 on one side, and unlike the conventional case, it is not necessary to provide the terminal blocks 22 on both sides of the cores 40a and 40 b. Therefore, in the transformer 10 of the present embodiment, the size of the entire device can be reduced, and miniaturization can be achieved.

In the present embodiment, since the terminal block 22 is provided on one side of the cores 40a and 40b, when the transformer 10 and other electronic components are connected, the electronic component groups for the primary coil side and the secondary coil side can be arranged on one side of the cores 40a and 40 b. Therefore, the degree of freedom in arrangement of the electronic component groups constituting the electronic circuit can be increased, and the space for arranging the electronic component groups can be reduced.

Further, since the terminal block 22 is provided on one side of the cores 40a and 40b, the transformer 10 is reliably disposed on one side of the space where the electronic component group is provided. As a result, the mechanism for cooling the transformer 10 is easy to install, and the cooling efficiency of the transformer 10 can be improved.

In the present embodiment, the other one of the pair of first lead portions 37a and 37b is raised toward the first inner terminal 60b located between the first end terminal 60a and the second end terminal 60c of the terminal block 22, and the other one of the pair of second lead portions 38a and 38b is raised toward the second inner terminal 60d located between the first end terminal 60a and the second end terminal 60c of the terminal block 22.

Therefore, it is easy to connect the pair of first lead portions 37a, 37b to the first end side terminal 60a and the first inner side terminal 60b, and connect the pair of second lead portions 38a, 38b to the second end side terminal 60c and the second inner side terminal 60 d. Therefore, the pair of first lead portions 37a and 37b and the pair of second lead portions 38a and 38b can be fixed to one terminal block 22, and the overall size of the device can be reduced, thereby realizing miniaturization of the transformer 10.

In the present embodiment, the first end terminal 60a and the second end terminal 60c have lead connecting portions 61 to which the first lead portions 37a and the second lead portions 38a are connected, and external connecting portions 62 to be connected to the circuit board, respectively, and the external connecting portions 62 are disposed closer to the skeleton main body 24 than the lead connecting portions 61. Therefore, compared with the case where the lead connection portion 61 is disposed closer to the bobbin main body 24 than the external connection portion 62, the lateral width (width in the direction perpendicular to the winding axis direction) of the transformer 10 can be reduced, and downsizing of the transformer 10 can be effectively achieved.

In the present embodiment, the first end terminal 60a and the second end terminal 60c are provided on the terminal block 22 such that the external connection portions 62 of the first end terminal 60a and the second end terminal 60c face in a direction parallel to the winding axis direction. By providing the first end terminal 60a and the second end terminal 60c on the terminal block 22 such that the external connection portion 62 faces in the direction parallel to the winding axis direction in this way, the width of the transformer 10 can be reduced, and the transformer 10 can be effectively miniaturized.

Further, by providing the first end side terminal 60a and the second end side terminal 60c on the terminal block 22 so that all of the external connection portions 62 face in the same direction (direction parallel to the winding axis direction), when the circuit board or the like is connected to each of the external connection portions 62, the entire external connection portion 62 can be connected to the circuit board or the like at one time.

In the present embodiment, the insulating plate 70 is provided on the terminal block 22 so as to separate the first lead portion 37b and the second lead portion 38 b. Therefore, a sufficient space distance between the first lead portion 37b and the second lead portion 38b can be ensured, and insulation between the first lead portion 37b and the second lead portion 38b can be formed well.

In the present embodiment, the first end terminal 60a and the first inner terminal 60b are adjacent to each other, and the second end terminal 60c and the second inner terminal 60d are adjacent to each other. Therefore, the number of adjacent portions of the first lead portions 37a, 37b and the second lead portions 38a, 38b can be reduced. Therefore, it is not necessary to secure insulation distances between the first lead portions 37a, 37b and the second lead portions 38a, 38b at a plurality of locations, and the transformer 10 can be effectively miniaturized.

In addition, it is easy to arrange the external electronic circuits connected to the first end side terminal 60a and the first inner side terminal 60b and the external electronic circuits connected to the second end side terminal 60c and the second inner side terminal 60d in order.

In the present embodiment, the insulating tube 80 is attached to the rising portion 38b1 of the second lead portion 38b rising toward the second inner terminal 60 d. Therefore, insulation of the first lead portion 37a and the second lead portion 38b can be ensured by the insulating tube. Therefore, the terminal block 22 can be prevented from being enlarged due to the ensured insulation distance, and the transformer 10 can be effectively miniaturized.

In the present embodiment, the extending flange portion 30c is formed at a part of the insulating partition flange 30 on the side of the terminal block 22 in the circumferential direction, and the engaging portion 30e, with which one of the second lead portions 38a is engaged, is formed at the extending flange portion 30c. Therefore, when the second end terminal 60c provided on the terminal block 22 is raised, one of the second lead portions 38a is easily raised.

Further, although not shown in detail, a heat radiation mechanism may be provided above the frame 20, whereby the first wire 37 through which a large current passes and the amount of heat generated increases can be cooled effectively.

Second embodiment

The transformer 110 of the embodiment shown in fig. 5 to 8 has the same configuration as the transformer 10 of the first embodiment except for the following, and functions and effects similar to those of the first embodiment. The components of the transformer 110 shown in fig. 5 to 8 correspond to those of the transformer 10 of the embodiment shown in fig. 1 to 4, and the same reference numerals are given to the corresponding components, and a part of the description thereof is omitted.

As shown in fig. 5, the transformer 110 has a bobbin 120 and a cover 150. As shown in fig. 6A, the skeleton 120 includes a skeleton body 124 and a terminal block 122 integrally formed with an upper portion of one end of the skeleton body 124 in the X-axis direction.

A convex portion 25a is formed in the step portion 25 formed on the upper surface of the skeleton main body 124, and a concave portion 54a integrally formed with the locking piece 54 of the cover 150 can be engaged with the convex portion 25 a. In the present embodiment, the extending side leg guide piece 57 is connected to one end of the side leg guide piece 56 of the cover 150 in the Y-axis direction. As shown in fig. 5, the extending side leg guide 57 abuts on the outer surface of the side legs 48a, 48b of the cores 40a, 40b on the outer side in the X-axis direction.

As shown in fig. 7, the extension flange portion 34c is formed at a part of the circumferential direction of the winding bulkhead flange 34 on the terminal block 22 side. The extending flange portion 34c protrudes outward of the winding bulkhead flange 34 and extends to the vicinity of the outer end portion of the terminal block 22 in the X-axis direction. A shallow lead groove 34d for guiding the first lead portion 37B shown in fig. 6B to the upper side in the Z-axis direction is formed in the Y-axis direction central portion of the extension flange portion 34 c.

The boss portion 90 is formed at one end of the end bulkhead flange 31 in the X-axis direction on the side where the terminal block 22 is disposed and at the other end of the terminal block 22 in the X-axis direction on the opposite side. For example, bolt holes are formed in the hub portion 90.

As is clear from comparison of fig. 4 and 8, the present embodiment differs from the first embodiment in the point where the first wire 37 and the second wire 38 are alternately arranged between the sections S1 and S2 and the sections S1a and S2 a.

That is, as shown in fig. 8, in the present embodiment, the second winding wire 38 is wound around the sections S1a, S2a separated in the Z-axis direction by the partition flanges 30, 34, 32, and the second coil portion 36 is formed. The first winding 37 is wound around the sections S1 and S2 separated in the Z-axis direction by the partition flanges 31, 33, and 30, and forms the first coil portion 35.

As shown in fig. 5 and 6B, in the present embodiment, the first lead portion 37a of the first wire 37 is led out from the section S1 shown in fig. 8 to the vicinity of the first end portion in the Y axis direction on the side of the terminal block 22. As shown in fig. 5 and 6B, the first lead portion 37B of the first wire 37 is erected from the section S2 shown in fig. 8 in a direction parallel to the winding axis direction.

In the present embodiment, as shown in fig. 5 and 6B, the second lead portion 38a of the second wire 38 is led out from the section S2a shown in fig. 8 to the vicinity of the second end portion of the other side of the terminal block 22 in the Y-axis direction. As shown in fig. 5 and 6B, the first lead portion 38B of the second winding wire 38 is erected from the section S1a shown in fig. 8 in a direction parallel to the winding axis direction.

As described above, in the present embodiment, the lead portions 37a and 38a are led to the vicinity of the first end portion in the Y axis direction on one side and the vicinity of the second end portion in the Y axis direction on the other side of the bobbin 22 with respect to the windings 37 and 38 of the sections S1 and S2a wound on the outer side of the winding drum portion 28 of the bobbin 22 in the Z axis direction.

In contrast, in the first embodiment, the point is different from the first embodiment in that the lead portions 37a and 38a are led to the vicinity of the first end portion in the Y-axis direction on one side and the vicinity of the second end portion in the Y-axis direction on the other side of the bobbin 22 with respect to the windings 37 and 38 of the sections S1a and S2 wound on the inner side in the Z-axis direction of the winding tube portion 28 of the bobbin 22.

In the example shown in fig. 5, the insulating tube 80 of the first embodiment is not attached to the first lead portion 37b, but the insulating tube 80 may be attached.

According to the present embodiment, the same effects as those of the first embodiment are obtained. In the present embodiment, since the insulating plate mounting groove 223 of the first embodiment is not formed in the terminal block 122 and the insulating plate 70 is not provided, the structure of the transformer 10 can be simplified, and the transformer 10 can be effectively miniaturized.

Further, although not shown in detail, a heat radiation mechanism may be provided below the frame 20, whereby the first wire 37 having an increased amount of heat generated by the large current can be cooled effectively.

The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the present invention.

In the above embodiments, the application example of the transformer of the present invention has been described, and the present invention can be applied not only to a transformer but also to other coil devices.

In each of the above embodiments, as shown in fig. 3A and 7, the terminal block 22 is formed so as to be asymmetric with respect to the X axis passing through the Y axis direction center portion of the frame 20, and one end portion of the terminal block 22 slightly protrudes toward the Y axis direction side. However, the shape of the terminal block 22 is not limited to the illustrated example, and may be formed so as to be laterally symmetrical with respect to the X axis.

In each of the above embodiments, as shown in fig. 1 and the like, each of the terminals 60a, 60b, 60c, 60d is mounted to each of the lead mounting portions 225a, 225b, 225c, 225 d. However, the terminals 60a, 60b, 60c, 60d are not necessarily attached to the lead portion attaching portions 225a, 225b, 225c, 225d, and may be provided at the distal ends of the leads 37a, 37b, 38a, 38 b.

For example, in the transformer 10 of the present embodiment, the manner of dividing the magnetic core may be changed. For example, in the above-described embodiment, the magnetic core is constituted by an E-core-E-core combination as the split core, but the magnetic core may be assembled by an E-core-I-core combination.

Symbol description

10 … transformer

20. 120 … skeleton

22 … terminal block

221 a. First end-side passage

221 b. First inner passage

221c second inner passage

221d second end-side passage

222 a. First end side wall portion

222d second inner side wall portion

223 insulating board mounting groove

225a first end lead mounting portion

225b first inner lead mounting portion

225c second inner lead mounting portion

225d second end side lead mounting portion

24. 124. Skeleton main body

25 step

25a convex part

26 through-holes for core pins

27 separation convex part

28 winding tube portion

29. Convex portion

30 … insulating partition flange

30c extension flange portion

30d & ltlead wire groove

30e engaging portion

31. 32 … end bulkhead flange

33. 34 … coiled partition flange

33a, 34a … connecting groove

33c, 34c extension flange portion

33d, 34d & ltlead wire groove

35 … first coil part

36 … second coil part

37 … first winding

37a, 37b … lead portions

38 and … second winding

38a, 38b … lead portions

40a, 40b … magnetic core

42a, 42b … split cores

44a, 44b … base

46a, 46b … middle foot

48a, 48b … side feet

50. 150 … cover

52 … cover body

54 and … clamping piece

54a concave portion

56 … side foot guide piece

57 extension side foot guide piece

60a first end terminal

60b first inner terminal

60c second inner terminal

60d second end terminal

61 lead wire connecting portion

62 external connection part

70.insulating plate

80 insulating tube

90 hub

Claims (10)

1. A coil device is characterized in that,

the device comprises:

a frame having a terminal block formed at one end in an X-axis direction and extending in a Y-axis direction orthogonal to the X-axis direction;

a first coil unit formed by winding a first wire around the bobbin, the first wire constituting one of a primary coil and a secondary coil; and

a second coil part which is arranged at a position different from the first coil part in the Z-axis direction of the winding shaft, and is formed by winding a second winding wire around the framework, wherein the second winding wire forms the other one of the primary coil and the secondary coil,

One of the pair of first lead portions of the first wire has: a first end-side lead-out portion led out toward a vicinity of an end portion of the terminal block on one side in the Y-axis direction; a first rising portion rising toward a first end-side lead mounting portion near an end portion of the terminal block on one side in the Y-axis direction; and a first lead-out main body portion led out to the opposite side of the skeleton main body forming side along the X-axis direction through at least a part of the terminal block,

one of the pair of second lead portions of the second wire has: a second end-side lead-out portion led out toward the vicinity of the other end of the terminal block in the Y-axis direction; a second rising portion rising toward a second end-side lead mounting portion near an end portion of the terminal block on the other side in the Y-axis direction; and a second lead-out main body portion led out to the opposite side of the skeleton main body forming side along the X-axis direction through at least a part of the terminal block,

the terminal block has: a first end-side passage; a second end-side passage is provided,

a first end side wall portion is formed on an outer side of the first end side passage in the Y axis direction, the second end side passage is disposed adjacent to the second end side lead mounting portion on the other side of the terminal block in the Y axis direction, the first end side passage and the second end side passage extend toward the X axis direction and have a groove portion opening upward in the Z axis direction,

The first lead-out main body portion passes through the first end side passage along a bottom surface of the groove portion of the first end side passage,

the second lead-out main body portion passes through the second end side passage along a bottom surface of the groove portion of the second end side passage.

2. A coil assembly as set forth in claim 1, wherein,

the other one of the pair of first lead portions stands up toward a first inner lead mounting portion located between the first end side lead mounting portion and the second end side lead mounting portion of the terminal block,

the other one of the pair of second lead portions stands up toward a second inner lead mounting portion located between the first end side lead mounting portion and the second end side lead mounting portion of the terminal block.

3. A coil device according to claim 1 or 2, characterized in that,

the first end terminal mounted on the first end lead mounting portion or the second end terminal mounted on the second end lead mounting portion has a lead connecting portion to which the first lead portion or the second lead portion is connected and an external connecting portion connected to a circuit board,

The external connection portion is disposed closer to the skeleton than the lead connection portion.

4. A coil assembly as set forth in claim 3, wherein,

the first end terminal and the second end terminal are provided on the terminal block such that the external connection portions of the first end terminal and the second end terminal face in a direction parallel to the winding axis direction.

5. A coil device according to claim 1 or 2, characterized in that,

an insulating plate is provided on the terminal block so as to separate the other first lead portion and the other second lead portion.

6. A coil assembly as set forth in claim 2, wherein,

the first end side lead mounting portion and the first inner lead mounting portion are adjacent, and the second end side lead mounting portion and the second inner lead mounting portion are adjacent.

7. A coil assembly as set forth in claim 2, wherein,

an insulating tube is attached to the rising portion of the first lead portion or the second lead portion rising toward the first inner lead attachment portion or the second inner lead attachment portion.

8. A coil device according to claim 1 or 2, characterized in that,

The framework is formed with:

a winding tube section around which the first winding wire and the second winding wire are wound;

a plurality of flange parts formed on the outer circumference of the winding drum part at positions different from each other in the winding axis direction,

an extending flange portion is formed on a part of the flange portion in the circumferential direction of the terminal block side,

the extending flange portion is formed with an engaging portion with which the one first lead portion or the one second lead portion is engaged.

9. A coil device according to claim 1 or 2, characterized in that,

the one first lead portion is led out from the other side of the first lead portion in the Y-axis direction toward one side so as to intersect with the other first lead portion, and is erected on the inner side of the end portion on the outer side of the terminal block in the X-axis direction toward the first end-side lead mounting portion,

the one second lead portion is led out from one side of the second lead portion in the Y axis direction toward the other side so as to intersect the other second lead portion, and is erected on the inner side of the end portion on the outer side of the terminal block in the X axis direction toward the second end-side lead mounting portion.

10. A coil device according to claim 1 or 2, characterized in that,

the first rising portion is bent from an end portion of the first end-side lead-out portion in the Y-axis direction toward a winding axis direction,

the first rising portion is disposed inside an end portion of the terminal block which is outside in the X-axis direction,

the first lead-out main body portion is bent from an end portion of the first rising portion in the winding axis direction toward the outside in the X axis direction,

the second rising portion is bent from the end of the second end-side lead-out portion in the Y-axis direction toward the winding axis direction and passes through the second end-side passage,

the second rising portion is disposed inside an end portion of the terminal block which is outside in the X-axis direction,

the second lead-out main body portion is bent from an end portion of the second rising portion in the winding axis direction toward the outside in the X axis direction and passes through the second end-side passage.