JP2020145304A - Coil device - Google Patents

Abstract

To provide a coil device which improves an assemblability by suppressing variation of a position of a coil terminal.SOLUTION: In a coil device 10, a coil 12 formed by two stages of an upper layer 24 and a lower layer 26 so as to be wound with an α winding, comprises: an overlapping part 28 overlapped in an axial direction of the coil 12; and a pair of first and second end parts 16 and 18, which are extended in a radial direction outward for the overlapping part 28 so as to be bent, and are led out to an external part from leading open parts 48a and 48b of a core 22 in the outermost peripheral portion of the upper layer 24 and the lower layer 26. The first and second end parts 16 and 18 mount a color member 20 made of a resin-made material. The color member 20 is structured by: a pair of first and second holding parts 32 and 34 covering one part of the first and second end parts 16 and 18; and an annular part 30 that connects the first holding part 32 and the second holding part 34. The first and second end parts 16 and 18 are inserted into the leading open parts 48a and 48b of the core 22 via the first and second holding parts 32 and 34.SELECTED DRAWING: Figure 1

Description

The present invention relates to a coil device having a two-stage coil formed by winding α.

Conventionally, a coil device having a coil wound in two stages with α winding and a core in which the coil is housed has been known. For example, in the coil device disclosed in Patent Document 1, It has a coil having first and second winding portions in which a flat wire is wound in an annular shape by α winding, and the first winding portion and the second winding portion are two steps in the winding axis direction. The first winding portion and the second winding portion are connected to each other on the inner peripheral side thereof. Then, the first coil terminal of the first winding portion and the second coil terminal of the second winding portion are each drawn out from the outer peripheral side and electrically connected to the external connecting member, respectively.

Japanese Unexamined Patent Publication No. 2014-33037

However, in the coil of the coil device as described above, the first coil terminal and the second coil terminal are caused by a force (springback) that causes the elastically deformed flat lead wire to return to its original state by being wound. Will move away from each other, and the first and second coil terminals will be displaced outward from the preset lead-out position of the core. As a result, for example, the first and second coil terminals enter the inside of the core, and there is a problem that the connection with the external connecting member cannot be performed or the connection position varies, resulting in a decrease in assembling property. ..

The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a coil device capable of improving assembling property by suppressing positional variation of coil terminals.

In order to achieve the above object, the aspect of the present invention is a coil having first and second winding layers having two stages in the axial direction, and the first and second winding layers are wound by α winding. In a coil device with a core that houses the coil,
The outermost peripheral parts of the first and second winding layers are overlapped with the overlapping portion in the axial direction of the coil.
A set of coil terminals that are bent outward in the radial direction with respect to the overlapping portion and are drawn out from the opening of the core.
With
A collar member made of a non-conductive material is attached to the coil terminal, and the collar member consists of a set of holding portions that cover at least a part of the coil terminals and a connecting portion that connects one holding portion and the other holding portion. It is configured so that the coil terminals are in contact with the holding portion and are arranged together with the holding portion in the opening of the core.

According to the present invention, there is a coil in which the first and second winding layers having two stages in the axial direction are wound by α winding, and the shaft of the coil is located at the outermost peripheral portion of the first and second winding layers. It is provided with overlapping portions that overlap in the direction and a set of coil terminals that are bent outward in the radial direction with respect to the overlapping portion and are drawn out from the opening of the core in which the coil is housed. The coil is fitted with a non-conductive material collar member having a set of holding portions covering at least a portion of the coil terminals and a connecting portion connecting one holding portion and the other holding portion. The terminals are in contact with the holding portion and are both arranged in the opening of the core.

Therefore, when the coils composed of the first and second winding layers try to expand radially outward by springback, the set of coil terminals are formed so as to be folded back with the overlapping portion as an interval so as to approach each other. Since it tries to move in the direction, it can be brought into contact with the holding portion, and the movement of the coil terminal to the inside of the core can be prevented.

As a result, since the coil terminals can be arranged at predetermined positions of the core through the opening, it is possible to easily and surely connect to the external connection member by suppressing the positional variation of the coil terminals, and the assembly property is as follows. Can be improved.

According to the present invention, the following effects can be obtained.

That is, in a coil in which the first and second winding layers having two stages in the axial direction are wound by α winding, when the coil composed of the first and second winding layers tries to expand outward in the radial direction by springback. By forming a set of coil terminals so as to fold back at the outermost peripheral portion of the first and second winding layers with the overlapping portion overlapping in the axial direction of the coil as an interval, the coil terminals approach each other with respect to the holding portion. It can be brought into contact with the coil in the direction of the coil.

As a result, the coil terminals do not move to the inside of the core due to springback, the position variation of the coil terminals can be suppressed and the coil terminals can be arranged at a predetermined position, and the connection with the external connecting member can be easily performed. Assembling property can be improved by surely performing it.

It is an external perspective view which shows the coil device which concerns on embodiment of this invention. It is an exploded perspective view which shows the state which disassembled the coil and the collar member of the coil device shown in FIG. It is a top view of the coil device shown in FIG. It is a front view of the coil device shown in FIG.

A preferred embodiment of the coil device according to the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates a coil device according to an embodiment of the present invention.

As shown in FIGS. 1 to 4, the coil device 10 includes a coil 12 whose both ends are pulled out from the outer peripheral side and wound by α winding, and a bobbin 14 in which the coil 12 is wound on the outer peripheral side. The collar member 20 mounted on the first and second ends (coil terminals) 16 and 18 of the coil 12 in a state of being wound around the bobbin 14, and the core in which the coil 12 and the bobbin 14 are housed. 22 and is included.

For the coil 12, for example, a flat conducting wire covered with an insulating film such as enamel and having conductivity is used, and the coil 12 has two stages in the vertical direction (arrows A1 and A2 directions) so that the wide surface thereof is in the radial direction. As described above, it is wound around the outer periphery of the bobbin 14 by α winding.

The coil 12 first forms an inclined portion (not shown) so as to connect each of the two stages in the vertical direction (arrows A1 and A2 directions), and then a plurality of inclined portions are outwardly formed from one of the inclined portions. The upper layer (first winding layer) 24 is formed by winding, and the lower layer (second winding layer) 26 is formed by winding a plurality of times from the other side of the inclined portion toward the outside. The end portion of the upper layer 24 becomes the first end portion 16, and the end portion of the lower layer 26 becomes the second end portion 18. That is, in the coil 12, the upper layer 24 and the lower layer 26 are vertically laminated in two stages along the axial direction (arrows A1 and A2 directions).

Further, the outermost peripheral portion 24a of the upper layer 24 and the outermost peripheral portion 26a of the lower layer 26 of the coil 12 overlap in the axial direction of the coil 12 (arrows A1 and A2 directions), and the outermost peripheral portion 24a of the upper layer 24 Is wound counterclockwise from the center of the coil 12 to the outside, and the outermost peripheral portion 26a of the lower layer 26 is clockwise from the center to the outside so as to be in the opposite direction to the upper layer 24. It is wound around. That is, the upper layer 24 and the lower layer 26 are wound around the outermost peripheral portions 24a and 26a so as to be staggered in the circumferential direction.

Then, in the outermost peripheral portions 24a and 26a of the upper layer 24 and the lower layer 26, the portions overlapping with each other in the axial direction (arrows A1 and A2 directions) become the overlapping portion 28, and the overlapping portion 28 becomes a predetermined range along the circumferential direction. At the end of the overlapping portion 28 on the upper layer 24 side along the circumferential direction, a first end portion 16 that is bent and extended so as to be radially outward is formed. At the end portion on the lower layer 26 side along the circumferential direction of the overlapping portion 28, a second end portion 18 that is bent and extends so as to be radially outer is formed.

The first end portion 16 and the second end portion 18 are provided in parallel with the overlapping portion 28 interposed therebetween by a predetermined distance, and extend linearly in the same direction (arrow B1 direction). There is.

The collar member 20 is formed of, for example, a non-conductive material such as a resin material, and has an annular portion (connecting portion) 30 having an arcuate cross section corresponding to the outermost peripheral portions 24a and 26a of the wound coil 12. And a set of first and second holding portions 32 and 34 provided at both ends of the annular portion 30. That is, the first holding portion 32 and the second holding portion 34 are integrally connected by the annular portion 30.

The height dimension of the annular portion 30 is formed to be substantially constant, and the inner peripheral diameter is formed to be substantially the same as the outer peripheral diameters of the outermost outer peripheral portions 24a and 26a of the coil 12.

The first and second holding portions 32 and 34 are provided vertically offset with respect to the annular portion 30 along the axial direction of the coil 12 (arrows A1 and A2 directions), and the first holding portion 32 is annular. The first end portion 16 of the coil 12 is inserted by being provided at one end of the portion 30 and being provided above the annular portion 30 (in the direction of arrow A1). On the other hand, the second holding portion 34 is provided at the other end of the annular portion 30 below the annular portion 30 (in the direction of arrow A2), and the second end portion 18 of the coil 12 is inserted.

Further, the first holding portion 32 and the second holding portion 34 are provided so as to be symmetrical with respect to the height center of the annular portion 30.

The first holding portion 32 is formed, for example, in a rectangular shape with a long cross section in the axial direction of the coil 12 (arrows A1 and A2 directions), and is formed in the insertion direction of the first end portion 16 in the coil 12 (arrow B1 direction). One end of the annular portion 30 is connected to the lower end of the end portion that has a predetermined length along the line and is on the front side (arrow B2 direction) of the insertion direction. Then, inside the first holding portion 32, a first insertion space 36 into which the first end portion 16 of the coil 12 is inserted is formed. That is, the first holding portion 32 is formed in a tubular shape extending along the insertion direction (arrows B1 and B2 directions) of the first end portion 16.

Like the first holding portion 32, the second holding portion 34 is formed in a rectangular shape with a long cross section in the axial direction of the coil 12 (arrows A1 and A2 directions), and the second end portion 18 of the coil 12 is inserted. The other end of the annular portion 30 is connected to the upper end of the end portion that has a predetermined length along the direction (arrow B1 direction) and is on the front side (arrow B2 direction) of the insertion direction.

A second insertion space 38 into which the second end 18 of the coil 12 is inserted is formed inside the second holding portion 34. That is, the second holding portion 34 is formed in a tubular shape extending along the insertion direction (arrows B1 and B2 directions) of the second end portion 18.

The collar member 20 described above has an annular portion 30 in a state where the first end portion 16 of the coil 12 is inserted into the first holding portion 32 and the second end portion 18 of the coil 12 is inserted into the second holding portion 34. Is provided so as to abut on the outer peripheral surfaces (outermost outer peripheral portions 24a, 26a) of the coil 12, and is arranged so as to straddle the lower end of the upper layer 24 and the upper end of the lower layer 26 (see FIG. 4).

The core 22 is formed in a cylindrical shape that can be divided vertically (in the directions of arrows A1 and A2) from the magnetic material, and is provided so as to cover the base core portion 40 provided at the lower portion and the upper portion of the base core portion 40. It is composed of a cover core portion 42.

A cylindrical coil insertion portion 44 projecting upward (in the direction of arrow A1) is formed in the center of the base core portion 40, and a storage space 46 (in which the coil 12 is stored is stored on the outer peripheral side of the coil insertion portion 44). (See FIGS. 1 and 3).

Further, on the outer peripheral surface of the core 22, a set of drawer openings (openings) 48a and 48b extending from the internally formed storage space 46 to the outside are formed. The drawer openings 48a and 48b are opened so as to straddle the base core portion 40 and the cover core portion 42, and the first end portion 16 of the coil 12 and the first holding portion 32 of the collar member 20 are inserted. The drawer opening 48a of the coil 12 and the other drawer opening 48b into which the second end 18 of the coil 12 and the second holding portion 34 of the collar member 20 are inserted are in the vertical direction (the axial direction of the coil 12). It is arranged offset in the directions of arrows A1 and A2).

In other words, the set of drawer openings 48a and 48b are the first and second end portions 16 and 18 of the coil 12 housed inside the core 22, and the first and second holding portions 32 of the collar member 20. It is formed at a position corresponding to 34.

Then, the first and second end portions 16 and 18 of the coil 12 are exposed to the outside of the core 22 through the drawer openings 48a and 48b together with the first and second holding portions 32 and 34 of the collar member 20. Moreover, since it is surrounded by the first and second holding portions 32 and 34, it is not in contact with the core 22.

The coil device 10 according to the embodiment of the present invention is basically configured as described above, and a case where the wound coil 12 is assembled to the core 22 will be described next.

First, an operator (not shown) grasps the coil 12 wound in two stages by α-winding, brings the collar member 20 closer from the outer peripheral side of the coil 12, and inside the first and second holding portions 32 and 34. The first and second end portions 16 and 18, respectively, are inserted into the coil 12 so that the inner peripheral surface of the annular portion 30 is brought into contact with the overlapping portions 28 which are the outermost outer peripheral portions 24a and 26a of the coil 12.

As a result, the first and second end portions 16 and 18 are partially covered on the outer peripheral side by the first and second holding portions 32 and 34, and the tips thereof are covered with the first and second holding portions 32 and 34. It becomes a state of protruding to the outside from. Further, the annular portion 30 is arranged in two stages so as to cover the lower end of the upper layer 24 and the upper end of the lower layer 26 in the coil 12, so that the spring back acts radially outward with respect to the upper layer 24 and the lower layer 26. Is suppressed and the wound state is preferably maintained.

Further, due to the springback acting on the upper layer 24 of the coil 12, the first end portion 16 is placed on the second end portion 18 side (overlapping portion 28 side, arrow C1 in FIG. 3) in the first insertion space 36 of the first holding portion 32. The second end 18 is on the side of the first end 16 in the second insertion space 38 of the second holding 34 by the springback acting on the lower layer 26 of the coil 12 while being urged inward. (The overlapping portion 28 side, in FIG. 3, in the direction of arrow C2) is urged inward.

Then, the first end portion 16 and the second end portion 18 are urged in the directions of approaching each other in the first and second holding portions 32, 34, so that the first and second holding portions 32, It is held in contact with the inner wall of 34, respectively, and protrudes outward by a predetermined length with respect to the extending direction of the first and second holding portions 32, 34.

Next, the coil 12 having the collar member 20 mounted on the first and second end portions 16 and 18 is housed from above with respect to the base core portion 40 of the core 22, and the coil is inserted inside the bobbin 14. The part 44 is inserted and stored in the storage space 46. Further, the first and second end portions 16 and 18 of the coil 12 are inserted into the first and second holding portions 32 and 34 of the collar member 20 and are inserted into a set of drawer openings 48a and 48b, respectively. Will be inserted.

Finally, by mounting the cover core portion 42 from above so as to cover the base core portion 40 of the core 22, the coil 12 and the collar member 20 are housed in the storage space 46, and the first and second end portions 16, The assembly of the coil device 10 is completed when the 18 is inserted into the drawer openings 48a and 48b and pulled out to the outside of the core 22.

At this time, since the outer peripheral sides of the first and second end portions 16 and 18 are surrounded by the first and second holding portions 32 and 34 of the collar member 20 in the drawer openings 48a and 48b, the core 22 Since the collar member 20 is made of a non-conductive resin material, the first and second ends 16 and 18 and the core 22 are surely connected to each other. It is insulated.

As described above, in the present embodiment, the coil 12 wound around the bobbin 14 by α winding so as to form two stages of the upper layer 24 and the lower layer 26, and the core 22 in which the coil 12 is housed are provided. A first end that is an end portion of the upper layer 24 by providing an overlapping portion 28 in which the outermost outer peripheral portion 24a of the upper layer 24 and the outermost outer peripheral portion 26a of the lower layer 26 overlap in the axial direction (arrows A1 and A2 directions) of the coil 12. The portion 16 is bent so as to extend radially outward with respect to the overlapping portion 28, and the second end portion 18 formed at the end of the lower layer 26 extends radially outward with respect to the overlapping portion 28. It is formed by bending it so that it exists.

Further, on the outer peripheral side of the coil 12, a collar member 20 having first and second holding portions 32 and 34 into which the first and second end portions 16 and 18 can be inserted and held is mounted.

Therefore, when the upper layer 24 and the lower layer 26 constituting the coil 12 try to expand radially outward by springback, the first end portion 16 and the second end portion 18 try to move in a direction approaching each other. Therefore, it can be brought into contact with the inner wall surfaces of the first and second holding portions 32 and 34, respectively.

As a result, the first and second end portions 16 and 18 are prevented from entering the inside of the core 22 by springback, and the first and second end portions 16 are always moved out from the core 22 at a predetermined position. By making the and 18 project, it is possible to easily and surely connect to an external connecting member (not shown), and accordingly, the assembling property of the coil device 10 can be improved.

Further, the first and second end portions 16 and 18 of the coil 12 are inserted into the drawer openings 48a and 48b of the core 22 via the collar member 20 formed of a non-conductive material such as a resin material and are inserted to the outside. Therefore, it is possible to prevent the first and second end portions 16 and 18 from coming into direct contact with the core 22, and it is possible to easily and surely insulate both of them.

Further, the annular portion 30 of the collar member 20 is provided so as to connect between the first holding portion 32 into which the first end portion 16 is inserted and the second holding portion 34 into which the second holding portion 34 is inserted. Therefore, when the first end portion 16 and the second end portion 18 are urged in a direction approaching each other, the movement of the first and second end portions 16 and 18 is restricted by the annular portion 30. It becomes possible to do. As a result, the positions of the first and second end portions 16 and 18 of the coil 12 can be maintained at predetermined positions with high accuracy, and can be more easily and reliably connected to an external connecting member (not shown).

It should be noted that the coil device according to the present invention is not limited to the above-described embodiment, and of course, various configurations can be adopted without deviating from the gist of the present invention. For example, the columnar coil insertion portion 44 may be formed separately from the base core portion 40.

10 ... Coil device 12 ... Coil 16 ... First end 18 ... Second end 20 ... Color member 22 ... Core 24 ... Upper layer 26 ... Lower layer 28 ... Overlapping part 30 ... Circular part 32 ... First holding part 34 ... Second Holding portions 48a, 48b ... Drawer openings

Claims (1)

A coil device having first and second winding layers having two stages in the axial direction, and having a coil in which the first and second winding layers are wound by α winding and a core in which the coil is housed. In
The outermost peripheral portions of the first and second winding layers include overlapping portions overlapping in the axial direction of the coil.
A set of coil terminals that are bent outward in the radial direction with respect to the overlapping portion and are drawn out from the opening of the core.
With
A collar member made of a non-conductive material is attached to the coil, and the collar member is a set of holding portions that cover at least a part of the coil terminals, and a connecting portion that connects one holding portion and the other holding portion. A coil device comprising: The coil terminal abuts on the holding portion and is arranged together with the holding portion in the opening of the core.

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