JPH0774036A - Common-mode choke coil - Google Patents

Abstract

PURPOSE:To obtain a common-mode choke coil by a method wherein, when an extraction wire from a winding for a common-mode coil in which the winding has been conducted to a ring-shaped magnetic core by using a pair wire in which two wires to which an insulating film has been conducted have been bonded by an adhesive is connected to a pin terminal, the extraction wire from the winding is connected to the pin terminal without removing the insulating film and without conducting the stripping operation of the insulation film and a tying-up operation. CONSTITUTION:Guide grooves 14 into and through which an extraction wire 3 from winding 2 is inserted and passed are formed on both sides of a guide pillar 16 in the center of a case body 10 from the bottom face of a coil-housing recessed part 4 in the case body 10. An engaging part 17 in which the other end of a pin terminal 5 is directed to the side-face direction of the case body and in which a knife-shaped edge has been installed is formed inside the guide grooves perpendicularly to the extraction wire along the guide grooves. When the extraction wire is brought into contact with the engaging part and a case side-plate 11 is fitted to the case body, the extraction wire is engaged with the engaging part, this assembly is immersed in a soldering tank, and the extraction wire and the engaging part are soldered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inductor mounted on an electronic device, in which a pair of wires, which are formed by aligning and fixing a copper wire coated with an electric insulation film with an adhesive, are wound. When connecting the lead wire of the wound wire to the pin terminal,
The present invention relates to a common mode choke coil configured so that the other end of a pin terminal is formed into a knife shape with a blade attached and directly bites into a lead wire, and is then soldered to remove a conventional twist connection.

[0002]

2. Description of the Related Art In a coil in which a pair of wires in which two insulated copper wires are adhered with an adhesive is wound on a magnetic core formed into an annular shape with a closed magnetic circuit, a resin of an electric insulating material in which pin terminals to be mounted on a substrate are planted In order to connect the lead wires at the beginning and end of the winding wound in a case made of material to the pin terminals by tangling them, attach a solvent (alcohol etc.) to the lead wires of the winding and machine them one by one. By removing the insulating layer on the surface, the pair wires are made into a single wire, and the wires are entangled and soldered to the pin terminals, respectively, to form a coil that can be mounted on a board.

[0003]

A conventional common mode choke coil formed by bifilar winding a pair wire on an annular magnetic core of a closed magnetic circuit has a surface which is used for simplifying the winding. Wires with electrical insulation coating are paired with an adhesive to facilitate winding, but in the next step of connecting the lead wires of the winding to the pin terminals by connecting them, the surface insulation coating of the lead wires at the ends of the winding is When performing the stripping process, it is necessary to strip the paired wires one by one using a solvent, which makes the work cumbersome and dirty, and the number of man-hours for removing the insulating coating surface increases, which requires manpower. There is a problem that the cost increases due to the assembly.

[0004]

DISCLOSURE OF THE INVENTION According to the present invention, in connecting a lead wire of a winding of a common mode coil using an adhesive pair wire to a pin terminal, separation of the sticky pair wire of the lead wire and a lead wire surface. In order to peel off the electric insulation layer and peel off the pin terminal, the mechanical connection between the lead wire and the pin terminal is performed without peeling off the adhesive and the surface insulation layer with a solvent. Pull out the wire along the guide groove provided on the side of the case body in the board mounting direction, cut the surface insulating layer of the lead wire provided at the other end integrally with the pin terminal of the board mounting portion of the pin terminal, and cut the lead wire and the pin. In order to connect the other end of the pin terminal to the lead wire of the winding so as to connect with the terminal, the pin terminal is planted from the coil storage recess of the case body on the outer surface of the case body. Reach the bottom In the guide groove that allows the lead wire of the winding to pass through, provide a biting part that has a blade that is tapered toward the outer surface in the direction perpendicular to the guide groove direction and that faces the outer side, and the lead wire runs in the guide groove. When the case side plate, which is connected and supported integrally with the case body at the top of the case body and moves like a door in the side direction of the case body, comes into close contact with the side surface of the case body, the pin terminal is connected to the lead wire of the winding that passes through the guide groove. The blade of the biting part in the guide groove at the other end of the case is engaged to connect the lead wire of the winding and the pin terminal, and the locking projection provided on the tip of the case side plate is locked on the bottom of the case body. After fitting and fixing to the bottom of the case body, soak the bottom surface of the case body in the solder bath and raise the solder along the guide groove so that the pinch at the other end of the pin terminal and the lead wire of the winding are soldered in the guide groove. Connect and fix the pin terminals provided at the points And Kukoiru.

That is, according to the present invention, a common mode coil in which a pair of wires each having two wires are wound around an annular magnetic core, a coil accommodating concave portion on an upper surface for accommodating the common mode coil, and a pin terminal on a lower surface are provided. In a common mode choke coil in which a common mode coil is housed in the coil housing recess and the lead wire of the winding is connected to a pin terminal, a coil housing recess provided on an upper surface and a bottom surface of the coil housing recess From both sides of the guide pillar in the center of both side faces, there are provided guide grooves through which the lead wires of the windings that reach the bottom are inserted downward, and knife-shaped pin terminals having blades that are orthogonal to the direction of the guide grooves and face the side faces. On the other end of the case, and a case main body consisting of a recessed part that is fitted to the bottom of the case side plate attached to both sides on the bottom surface, and a locking recessed part that fits into the locking projection, and on both sides of the case body Up In a common mode in the coil storage recess of the case main body of the case including a case side plate closely connected to both side surfaces of the case main body and having a locking projection at the lower end that fits into the locking recess of the case main body. The coil is stored, the lead wire of the winding wire is pulled down along the guide groove, and a part of the lead wire of the winding wire is caught and fixed by the case side plate fitted and fixed in the locking recess. After that, the common mode choke coil is characterized in that the case body and the case side plate are dipped in a solder bath to solder-connect the lead wire and the indented portion.

[0006]

[Operation] A coil housing recess made by following the outer circumference of the common mode coil of the case main body for housing the common mode coil by pulling out the lead wires of the winding start and end of the pair wire wound around the annular magnetic core From the bottom of the case to the bottom of the case body, pull out the lead wire in the direction of the bottom of the case along the guide grooves provided on both sides of the guide pillar in the center of the side of the case body, and integrate it with the pin terminal midway near the bottom of the guide groove. The other side of the pin terminal is perpendicular to the pull-out direction of the winding lead wire (guide groove direction), and the tip of the knife-shaped blade is oriented toward the outside of the case body. As shown in the figure, when the lead wire is drawn into the guide groove and the case side plate is fitted and fixed to the case body, the lead wire of the winding is bent by the case side plate. Pushed to see section direction, by cutting the surface insulating line bite is involved in depressed portion by the lead line, ensure the connection between the lead wire and the pin terminal, to fix the lead wire and the pin terminal.

Further, the case body and the case side plate fixed to the case body are soaked up to the connecting portion of the bite part that is engaged with the lead wire at the other end of the pin terminal, and the guide groove is filled with solder to form the lead wire. Improves reliability by perfecting the connection with pin terminals. Since the guide groove extends from the bottom surface of the case body to the bottom of the coil housing recess of the case body, the solder can easily rise in the guide groove even when the case side plate is in close contact with the case body.

Therefore, by using the common mode choke coil of the present invention, it is not necessary to twist the winding to the pin terminal, while the case side plate is connected to the case body, and the engaging convex portion at the tip of the case side plate engages with the bottom surface of the case. Since the structure fits in the stop recess, the case side plate does not come off from the case body, and the indented part at the other end of the pin terminal and the lead wire of the winding are also soldered, and the outer periphery of the lead wire and the encased part is the case side plate and the case. Retained between the main body, so that a reliable connection is maintained.

[0009]

An embodiment of a common mode choke coil according to the present invention will be described in detail with reference to the drawings. Figure 1
1A shows a front view of the common mode choke coil according to the present invention (hereinafter referred to as a common coil) when a case side plate is removed from the right half from the center, and FIG.
1 (a) is a side view, and FIG. 1 (c) is a bottom view of FIG. 1 (a). The common mode coil 1 is formed by winding a paired wire winding 2 having two wires as a pair around a closed magnetic circuit annular magnetic core. The common mode coil is a coil with an inner circumference that is stably installed. A case side plate 11 which is housed in a case body 10 having a housing recess 4 and which is integrally connected to the case body at the upper end of the case body 10 is attached to both sides of the case body 10. The case side plate is the tip of the lower end of the case side plate 11. It is structured such that it is fitted and fixed to the locking concave portion 13 of the case body 10 by the locking convex portion 12 attached to the case body 10, and the inner surface of the case side plate 11 is in close contact with the outer surface of the case body 10.

On the other hand, the guide groove 14 for drawing out the lead wire 3 of the winding 2 of the common mode coil 1 which reaches the bottom surface of the case body 10 from the lower surface of the coil housing recess 4 of the case body 10 has a guide column 16 at the center on both side surfaces of the case body. The lead wires 3 of the windings 2 of the common mode coil 1 housed in the coil housing recesses 4 are provided on both sides of the case main body 10 along the guide groove 14 and below the case body 10. A blade facing the direction of the lead wire is provided in a guide groove through which the bite 17 at the other end of the pin terminal 15 near the bottom surface and at a right angle to the lead wire 3 is tapered so as to become deeper in the direction of the guide column 16. It is installed and installed.

As described above, the dent portion provided in the guide groove at the other end of the pin terminal is provided with a knife-shaped blade facing the case side plate 11 of the case main body, and the guide post 16 is provided.
Taper is provided so that it is deeper than the side surface in the direction of the guide, and it is inclined toward the guide pillar in the center of the case body, and the lead wire of the winding is drawn out along the guide groove to press the case side plate 11 against the lead wire 3 in the guide groove 14. Then, the leader line first moves toward the guide pole in the guide groove, and one point is supported by the guide pole and pushed in the direction of the blade of the bite part, which is about 1 / one of the diameter of the leader line.
It is configured such that the blade of the bite portion 17 is hard to be inserted into about 3 pieces.

FIG. 2 is an enlarged view of the portion B of FIG. 1 (c). When the case side plate 11 is displaced from the side surface of the case body 10 at the joint surface between the case body 10 and the case side plate 11. , At a position close to the bottom surface of the case body of the guide groove 14 provided from the bottom surface of the coil housing concave portion of the case body to the bottom surface of the case body, the other end of the pin terminal 15 is formed into a knife shape at a right angle to the guide groove 14. The lead wire 3 is attached to the side surface of the case main body so as to have a deep inclination in the direction of the guide pillar 16 at the center of the case main body, and the lead wire 3 is drawn out from the bottom surface of the coil housing recess into the guide groove toward the bottom surface of the case main body. It is pushed by the side plate of the case in the direction of the indented portion 17, stops at the position of the guide column, and is further pushed in the direction of the case body by the side plate 11 of the case to be engaged and connected to the indented portion 17. At this time, the blade of the biting part 17 may be a combination of procedures such that the insulating film of the lead wire is scraped off, the rear case side plate is pushed into the case body side, and the lead wire of the winding is connected to the pin terminal.

The case side plate 11 fits the locking projection 12 at the front end into the locking recess 13 of the case body 10 to fix the lead wire 3 of the winding to the biting part 17, thereby connecting the rear case body and the case side plate. The assembled case is dipped in the solder bath at least to the position of the indented part 17 at the other end of the pin terminal, the solder is raised along the inside of the guide groove, and the indented part 17 that is caught in the lead wire 3 of the winding and the drawer Solder the wire and the inside of the guide groove with solder and fix.

In the embodiment of the present invention, the locking projection at the tip of the case side plate is configured to be fitted and fixed in the locking recess provided on the bottom surface of the case body. The structure may be provided on the bottom of the side surface of the main body so as to fit with the locking projection provided on the side surface of the case side plate, or the case side plate need not be provided integrally with the case main body on the entire side surface of the case main body. If the locking protrusion and the portion for pressing the lead wire of the winding are integrated, the case side plates may be divided and attached to the case body.

Although the embodiment of the present invention has been described by taking the example of the common mode choke coil in which one magnetic core is provided with two windings, a normal mode choke coil in which one magnetic core is provided with one winding is also used. Of course, the present invention can be applied.

[0016]

In the common mode choke coil according to the present invention, the lead wire of the winding is not used for the adhesive pair wire having an electric insulation coating on the surface of the copper wire without using a solvent or an insulating release agent, and the coil housing recess of the case main body is used. Insert the guide groove through the guide groove from the bottom surface to the bottom surface of the case main body, and attach the other end of the pin terminal to the lead wire in the guide groove in a knife shape so that it is mounted orthogonally to the lead wire. After providing the indented part and pulling out the lead wire of the winding along the guide groove,
Close the case side plates on both sides of the case body to both sides of the case body, insert a part of the pinch at the other end of the pin terminal into the lead wire of the winding, and through the guide groove, solder the lead wire and the bite part. With such a configuration, it is possible to eliminate the work of insulating the pair of winding wires from each other, and to provide an inexpensive and reliable common mode choke coil that is easy to assemble.

[Brief description of drawings]

1 is a view showing a common mode choke coil according to the present invention, FIG. 1 (a) is a front view of a case and a case body excluding a half of one case side plate, and FIG. 1A is a side view, and FIG. 1C is a bottom view of FIG.

FIG. 2 is an enlarged view of a portion indicated by B in FIG. 1 (c).

[Explanation of symbols]

 1 common mode coil 2 winding wire 3 lead wire 4 coil housing recess 10 case body 11 case side plate 12 locking projection 13 locking recess 14 guide groove 15 pin terminal 16 guide post 17 biting part

Claims (1)

[Claims] 1. A common mode coil in which a pair of wires each having two wires are wound around an annular magnetic core, a coil housing recess is formed in an upper surface for housing the common mode coil, and a pin terminal is planted in a lower surface. A case and a common mode choke coil in which a common mode coil is housed in the coil housing recess and lead wires of windings are connected to pin terminals. A coil housing recess provided on an upper surface and both side surfaces from a bottom surface of the coil housing recess. The other end of a knife-shaped pin terminal having guide grooves for inserting lead wires of windings reaching the bottom face downward on both sides of a central guide column, and blades in the guide groove that are orthogonal to the direction of the guide groove and face the side surface. The case body consists of a dented part and a recessed part that is fitted to the bottom side of the case side plate that is attached to both sides of the case.The case body is integrated on both sides of the case body at the top of the case body. Connected to The common mode coil is housed in the coil housing recess of the case body, which is formed of a case and a case side plate that is in close contact with both side surfaces of the case body and has a locking projection that fits into the locking recess of the case body at the lower end. , Pull down the lead wire of the winding along the guide groove, and fix the part of the lead wire of the winding by fixing it by engaging a part of the lead wire of the winding with the bit at the other end of the pin terminal by the case side plate fitted and fixed in the locking recess. A common mode choke coil characterized in that the main body and the side plate of the case are immersed in a solder bath and the lead wire and the indented portion are connected by soldering.