JP2009094389A - Winding wire type coil component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding wire type coil component capable of preventing short circuit in the vicinity of winding wire junction without complicating a structure and decreasing winding density of the winding wire. <P>SOLUTION: A winding wire type coil 10 is configured by a core 12 with flanges 16 and 18 at both ends of a winding core part 14, a first winding wire 28 and a second winding wire 30, and terminal electrodes 24A, 26A, 24B and 26B. Convexed steps 20 and 22 are formed in the vicinity of both ends of the winding core part 14. One end 28A of the first winding wire 28 passes through the top of the step 20 to be fixed to the terminal electrode 24A, and the other end 28B thereof is connected to the terminal electrode 24B. One end 30A of the second winding wire 30 is connected to the terminal electrode 26A, and the other end 30B thereof passes through the step 22 to be connected to the terminal electrode 26B. This leads to that a distance by which electrical insulation is possible is provided between the winding wires 28 and 30 in the vicinity of the junction to prevent short circuit. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wire-wound coil component in which first and second windings are wound around a winding core portion having flanges at both ends, and more specifically to improvement of insulation between windings. It is.

A common mode choke coil in which two windings are wound around a core part of a drum core is used as a noise countermeasure component of various electronic devices. A conventional wire-wound coil component has a core member including a winding core around which a winding is wound and flanges disposed at both ends thereof, and ends of the winding wound around the winding core. The part has a structure connected to the terminal electrode formed on the collar part (for example, Patent Document 1 below).
JP 2004-63697 A

  Usually, the winding is an insulation coating of a wire material such as a copper wire, and its end is joined to the terminal electrode by means such as thermocompression bonding, but the insulation coating is melted in the vicinity of the joint. If the two windings are close to each other, a short circuit may occur. Conventionally, in order to prevent short-circuiting of the wire rod in the vicinity of the joint, the winding is routed or the winding density of the two windings is lowered. However, the structure is complicated and high characteristics are obtained. It may not be possible.

  The present invention focuses on the above points, and its purpose is a winding type that can prevent a short circuit of the winding in the vicinity of the joint without complicating the structure or reducing the winding density of the winding. It is to provide coil parts.

  In order to achieve the above object, the present invention provides a core having flanges provided at both ends of a core, first and second windings wound around the core, and hooks at both ends. And a terminal electrode to which end portions of the first and second windings are connected, respectively, in the vicinity of the flange portion of the core portion, A convex step is provided to form a distance allowing electrical insulation between the second windings, and an end of the first or second winding passes through the top of the step and the terminal It is connected to an electrode, and the end of the other winding is connected to the terminal electrode without passing through the step.

  One of the main forms is provided with a separate leg portion in the collar portion, a terminal electrode for connecting the end of the first or second winding to one of the separated leg portions, and the other leg The terminal is provided with a terminal electrode for connecting the end of the other winding. Another aspect is characterized in that at least one of the shape or size of the separated legs is different.

  Yet another embodiment is characterized in that the core and the top of the step are continuous via a slope or a curved surface. Yet another embodiment is characterized in that a side surface of the core portion is curved in an axial cross section. Yet another embodiment is characterized in that the step has a width and a height that are 1/2 or more of the diameter of the first and second windings. Yet another embodiment is characterized in that the flanges at both ends are connected by a plate-like magnetic core. The above and other objects, features and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings.

  In the present invention, the first and second windings are wound around the winding core portion provided with the flange portions at both ends, and the winding ends are connected to the terminal electrodes provided at the flange portion. In the linear coil component, a convex step for forming a distance allowing electrical insulation between the first and second windings is provided in the vicinity of the flange portion of the core portion. The end of the first or second winding passes through the top of the step and connects to the terminal electrode, and the end of the other winding connects to the terminal electrode without passing through the step. It was decided to. For this reason, the distance between the windings in the vicinity of the joint with the terminal electrode can be increased without complicating the winding structure of the windings or lowering the winding density of the windings. An effect of preventing the wire from being short-circuited can be obtained.

  Hereinafter, the best mode for carrying out the present invention will be described in detail based on examples.

  First, Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1A is an external perspective view of the wound coil of this embodiment, FIG. 1B is a plan view of FIG. 1A viewed from the direction of arrow F1, and FIG. FIG. 1C-2 is a plan view of the core viewed from the direction of arrow F1, FIG. 1C is a side view of the core viewed from the direction of arrow F2 of FIG. 1A, and FIG. It is sectional drawing cut | disconnected along the #A line and seeing in the arrow direction. As shown in FIG. 1, the winding coil 10 of the present embodiment includes a core 12 having flanges 16 and 18 at both ends of a core part 14, and a first winding wound around the core part 14. The wire 28 and the second winding 30, terminal electrodes 24 </ b> A and 26 </ b> A formed on the side surface 16 </ b> A of the flange portion 16, and terminal electrodes 26 </ b> B and 28 </ b> B formed on the side surface 18 </ b> A of the flange portion 18. .

  On the side surface 14A of the core portion 14 of the core 12, a convex step 20 is formed near the inner surface 17 of one flange portion 16, as shown in FIG. A convex step 22 is formed on the side surface 14B of the core portion 14 on the inner surface 19 side of the other flange portion 18. The first winding 28 and the second winding 30 are wound in the same direction on the winding core portion 14 configured as described above. In addition, as long as desired characteristics can be obtained, the interval between the first winding 28 and the second winding 30 is arbitrary. One end 28A of the first winding 28 is fixed to the terminal electrode 24A so as to pass through the top of the step 20, and the other end 28B is connected to the terminal electrode 24B. Similarly, one end 30A of the second winding 30 is connected to the terminal electrode 26A, and the other end 30B is connected to the terminal electrode 26B so as to pass through the step 22.

  The winding end portions 28A, 28B, 30A, 30B and the terminal electrodes 24A, 24B, 26A, 28B are joined together by means such as thermocompression bonding. The covering material peels off. However, in this embodiment, electrical insulation is possible because one of the first winding 28 and the second winding 30 is fixed in position so as to pass through the steps 20 and 22 in the vicinity of the joint. Thus, a short circuit can be prevented. The steps 20 and 22 are formed so as to have a width of 1/2 or more and a height of 1/2 or more of the diameter of the wire of the windings 28 and 30, for example.

  Next, the manufacturing procedure of the wire-wound coil component 10 of the present embodiment will be described. The ceramic powder mixed with the binder is pressed into a substantially rectangular parallelepiped by a mold, and then cut to obtain an unfired core body. Alternatively, the die is pressed so as to have a predetermined shape to obtain an unfired core body. Then, the unfired core body is fired to prepare the core body. Next, the paste is applied to the joint position of the flange portion of the core body, and then plating is performed to form the terminal electrodes 24A, 24B, 26A, and 26B. And the said winding type coil component 10 is obtained by winding two conducting wires and crimping | bonding an edge part to said terminal electrode 24A, 24B, 26A, 26B. At this time, as described above, one of the first winding 28 and the second winding 30 is fixed in position so as to pass through the steps 20 and 22. For example, NiZn ferrite, MnZn ferrite, or alumina is used as the ceramic as the core 12, and the terminal electrodes 24A, 24B, 26A, and 26B are made of, for example, Ag plated with Ni or Sn. Further, Cu is used as the wire of the windings 28 and 30, and urethane is used as the covering material, for example.

  As described above, according to the first embodiment, the projecting steps 20 and 22 are provided on the inner surfaces 17 and 19 of the flange portions 16 and 18 on the winding core portion 14 provided with the flange portions 16 and 18 at both ends. Then, the end portion 28A of the first winding 28 and the end portion 30B of the second winding wound around the winding core portion 14 are passed through the top portions of the steps 20, 22 to the terminal electrodes 24A, 26B. The other ends 28B and 30A are connected to the terminal electrodes 24B and 26A without passing through the steps 20 and 22. Therefore, the distance between the windings in the vicinity of the junction with the terminal electrode can be increased without complicating the lead-out structure of the windings 28 and 30 and lowering the winding density. Even if the insulation coating is peeled off, there is an effect that a short circuit can be prevented.

  Next, Embodiment 2 of the present invention will be described with reference to FIG. Fig. 2 (A-1) is a perspective view of a wound coil of Example 2, (A-2) is a plan view, (B) is a plan view of a wound coil of a modification of this embodiment, and (C) is a plan view. It is an external appearance perspective view of the winding type coil of a modification. In addition, the same code | symbol shall be used for the component which is the same as that of Example 1 mentioned above, or respond | corresponds. 2 (A-1) and 2 (A-2), a winding type coil 40 is wound around a core 12A having steps 20 and 22 at the core 14 and flanges 42 and 44 at both ends. The wire 28 and 30 are wound. A pair of separated leg portions 50A and 50B is formed on the flange portion 42 by a recess 46 provided at substantially the center of one side surface (for example, the lower surface side during mounting). Similarly, a pair of separated leg portions 52A and 52B is formed in the other flange portion 44 by a recess 48 provided substantially at the center of one side surface. Terminal electrodes 54A, 56A, 54B, and 56B are formed on the leg portions 50A, 50B, 52A, and 52B, and winding end portions 28A, 30A, 28B, and 30B are connected to the leg portions 50A, 50B, 52A, and 52B, respectively.

  As in the first embodiment, the windings 28 and 30 pass through the top of the step 20 on the winding end 28A side and are fixed to the terminal electrode 54A, and the winding end 30B covers the top of the step 22. It passes through and is connected to the terminal electrode 56B. As described above, according to the present embodiment, the recess portions 46 and 48 are provided in the flange portions 42 and 44 so that the joint portion with the winding end portion is separated. It is possible to make it difficult to short-circuit. Further, like the wound coil 60 shown in FIG. 2B, the size of the legs 50A and 50B is made different, and the size of the legs 52A and 52B is made different. 2 It is good also as a structure which is hard to contact in the junction part vicinity rather than the example shown to (A-1) and (A-2). Further, as shown in FIG. 2 (C), a plate-like magnetic core 58 may be provided on the upper surface of the winding type coil 40 shown in FIG. 2 (A) to form a closed magnetic circuit. Good. As shown in the figure, when the flange portions 42 and 44 are connected to each other by a plate-like magnetic core 58, the mounting device is mounted when the wound coil 40 is mounted on a circuit board or the like using an electronic component automatic mounting device. It is possible to prevent the occurrence of suction mistakes caused by the component suction nozzle. It is also possible to reduce the magnetic flux bias of the drum core.

In addition, this invention is not limited to the Example mentioned above, A various change can be added in the range which does not deviate from the summary of this invention. For example, the following are also included.
(1) The shapes and dimensions shown in the above embodiments are merely examples, and may be changed as appropriate. For example, in the first embodiment, the core part 14 of the core 12 has a substantially rectangular parallelepiped shape. However, like the core 70 shown in FIG. 3A, the core part 72 provided with flanges 74 and 76 at both ends. Curves 78A and 78B may be formed on the side surfaces of the plate. In addition, it is possible to stabilize the windings 28 and 30 at the steps 80 and 82 by setting the curvatures 78A and 78B to about 0.1 to 4% with respect to the winding width W of the winding. Become. Further, as in the core 90 shown in FIG. 3 (B), steps 98 and 100 are provided in the core portion 92 having flange portions 94 and 96 at both ends, and the top portion of the steps 98 and 100 and the core portion are provided. 92 may be continuous with the curved surfaces 98A and 100A. Then, by placing the winding that is not fixed to the tops of the steps 98 and 100 along the curved surfaces 98A and 100A, the contact area with the winding increases, so that the winding can be stably fixed. The curvature of the curved surfaces 98A and 100A is, for example, about 10 to 100 μm.

  (2) In the first embodiment, the steps 20 and 22 are formed over almost the entire length of the end portions of the side surfaces 14A and 14B of the winding core portion 14, but this is also an example and can be changed as necessary. You can do it. For example, the core 110 shown in FIGS. 3C-1 and 3C-2 includes flange portions 114 and 116 at both ends of the core portion 112, and corners of the end portions near the flange portions of the side surfaces 112A and 112B. This is an example in which steps 118 and 120 are provided in the part. 3 (D-1) and 3 (D-2) includes the flange portions 134 and 136 at both ends of the core portion 132, and the abbreviated end portions of the side surfaces 132A and 132B near the flange portions. This is an example in which steps 138 and 140 are provided at the center. In the illustrated example, the steps 138 and 140 are continuous with the winding core portion 132 and the inclined surfaces 138A and 140A. By providing such slopes 138A and 140A, the wire contact area can be increased and the wire fixing can be stabilized, as in the example shown in FIG. 3B.

  (3) In the first embodiment, the cross section of the core portion 14 is substantially rectangular. However, this is also an example, and may be changed as necessary. For example, like the core 150 shown in FIG. 4A, a pair of steps 154 and 156 may be provided so as to face a core portion 152 having a substantially octagonal cross-sectional shape. Further, like the core 160 shown in FIG. 4B, a pair of curved steps 164 and 166 may be provided on the outer peripheral surface of the core portion 162 having a substantially elliptical cross section. Further, as in the core 170 shown in FIG. 4C, steps 174, 176, 178, and 180 are provided on the four projecting portions of the core portion 172 having a substantially cross-shaped cross section, and winding is performed using any step. The line may be fixed. Further, like the core 190 shown in FIG. 4D, the long side of the core part 192 is added to the core part 192 having a cross-sectional shape in which a substantially semicircular convex part is formed on a short side of a substantially rectangular shape. A set of steps 194 and 196 may be provided in the portion. Of course, the cross-sectional shape of the core part and the step shown in FIGS. 4A to 4D is also an example, and may be appropriately changed as necessary as long as the same effect is obtained.

(4) The materials shown in the above embodiments are also examples, and various known materials may be used.
(5) The manufacturing procedure shown in the above embodiment is also an example, and may be changed as appropriate.
(6) The number of turns of the windings 28 and 30 shown in the above embodiment is also an example, and may be changed as needed.
(7) The plate-like magnetic core 58 shown in the second embodiment is also an example, and may be provided in the wound coil 10 of the first embodiment.
(8) The coil component of the present invention is a use example in which an operation signal is suitable, but can be applied to all uses of the image vibration transmission having a large capacity.

  According to the present invention, the first and second windings are wound around the winding core portion provided with the flange portions on both ends, and the end portions of the windings are connected to the terminal electrodes provided on the flange portion. A convex step for forming a distance allowing electrical insulation between the first and second windings is provided in the vicinity of the flange portion of the core portion, and the first or second The end of the second winding is connected to the terminal electrode through the top of the step. This makes it possible to increase the distance between the windings in the vicinity of the junction with the terminal electrode without complicating the winding structure of the windings or lowering the winding density of the windings. Applicable. It is particularly suitable for common mode choke coil applications.

It is a figure which shows Example 1 of this invention, (A) is an external appearance perspective view of a winding type coil, (B) is a top view of the said winding type coil, (C-1) is a top view of a core, (C- 2) is a side view of the core, and (D) is a sectional view of (C-2) taken along line # A- # A and viewed in the direction of the arrow. It is a figure which shows Example 2 of this invention, (A-1) is a perspective view, (A-2) is a top view, (B) is a top view of a modification, (C) is an external appearance perspective view of a modification. It is. It is a figure which shows the other Example of this invention. It is a figure which shows the other Example of this invention.

Explanation of symbols

10: Winding type coil 12, 12A :: Core 14: Core part 14A, 14B, 16A, 18A: Side face 16, 18: Eaves part 17, 19: Inner face 20, 22: Step 24A, 24B, 26A, 26B: Terminal Electrode 28, 30: Winding 28A, 28B, 30A, 30B: End 40: Winding coil 42, 44: Gutter 46, 48: Recess 50A, 50B, 52A, 52B: Leg 54A, 54B, 56A, 56B : Terminal electrode 58: Plate-shaped magnetic core 60: Winding coil 70, 90, 110, 130, 150, 160, 170, 190: Core 72, 92, 112, 132, 152, 162, 172, 192: Winding core 74, 76, 94, 96, 114, 116, 134, 136: buttocks 78A, 78B: curve 80, 82, 98, 100, 118, 120, 138, 14 , 154,156,164,166,174,176,178,180,194,196: step 98A, 100A: curved 112A, 112B, 132A, 132B: side surface 138A, 140A: Slope

Claims (7)

A core provided with flanges at both ends of the core, first and second windings wound around the core, and the first and second formed on the flanges at both ends. Wire-wound coil components including terminal electrodes to which end portions of the windings are respectively connected,
In the vicinity of the flange portion of the winding core portion, a convex step for forming a distance capable of electrical insulation between the first and second windings is provided,
The end of the first or second winding passes through the top of the step and is connected to the terminal electrode, and the end of the other winding connects to the terminal electrode without passing through the step. Wound coil components characterized by that.   A separate leg portion is provided in the collar portion, a terminal electrode for connecting the end portion of the first or second winding is provided on one of the separated leg portions, and an end of the other winding is provided on the other leg portion. 2. The coiled coil component according to claim 1, further comprising a terminal electrode for connecting the portions.   The wire-wound coil component according to claim 2, wherein at least one of the shape and size of the separated leg portions is different.   The winding type coil component according to any one of claims 1 to 3, wherein the winding core and the top of the step are continuous via a slope or a curved surface.   5. The coiled coil component according to claim 1, wherein a side surface of the core portion is curved in an axial cross section.   The wound type coil component according to any one of claims 1 to 5, wherein the step has a width and a height that are 1/2 or more of a diameter of the first and second windings.   The winding type coil component according to any one of claims 1 to 6, wherein the flanges at both ends are connected to each other by a plate-like magnetic core.

Images