JPH0411708A - Coil part - Google Patents

Abstract

PURPOSE:To eliminate interference between protrusions and a core and eliminate need of temporary attaching an end of a wire at the time of winding by positioning a plurality of protrusions on a bobbin flange on a side where the bobbin is to be mounted and also at positions where the protrusions do not protrude from an outer peripheral face of the flange and by binding an end of the coil wire wound around the bobbin to the protrusions. CONSTITUTION:A starting end of a coil wire 20 is bound to a first protrusion 6a, a gear not shown is engaged with gear parts 4a, 4b to transmit torque, a bobbin 1 is rotated with one of sides 10a of a core 10 as the center, and the wire 20 is wound around two grooves 3a, 3b. When the coil is wound, the end of winding is bound to a second protrusion 6b. Then the prepared bobbin 1 is mounted on a terminal block 11, wherein cream solder is applied in advance on the protrusions 6a, 6b with the wire 20 bound, the end of the wire 20, a pin terminal 15 and the protrusions 6a, 6b are fixed with solder, and also electric connection is made. Thus the protrusions 6a, 6b will not interfere with the core 10 even if the bobbin 1 is rotated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to coil components used in constructing electronic circuits such as filters and oscillators.

BACKGROUND ART Conventionally, various types of choke coils have been provided, including those of the bobbin split type. This moves the bobbin 2 times parallel to the axis.
The bobbin is divided into sections, and one side of a roughly mouth-shaped core is held between each bobbin piece to form a roughly cylindrical bobbin, and a coil wire material is wound around the bobbin. The work of winding the coil wire is done by rotating the bobbin with it attached to the core.
If a terminal is provided on the bobbin in advance, the terminal will come into contact with the core during rotation, making it impossible to rotate the bobbin. Therefore, no terminal is provided on the bobbin, and the end of the fill wire is temporarily fixed to the bobbin with adhesive. After the winding work is completed, the terminal block with the terminal is fixed to the bobbin, and the coil end is tied to the terminal and soldered.

However, with the above-configured fill parts, the end treatment of the coil wire requires two steps: temporarily fixing it to the bobbin with adhesive, tying it to the terminal, and soldering it, and it is difficult to automate the tying process. There is a problem with this.

SUMMARY OF THE INVENTION An object of the present invention is to provide an in-line coil component that eliminates the step of temporarily fixing the end of a coil wire material to a bobbin with an adhesive, and that facilitates automation of the tying process.

Means and Function for Solving the Problems In order to solve the above problems, the coil component according to the present invention differs from the conventional bobbin split type coil component in that a plurality of protrusions are formed on the flange of the bobbin from the outer peripheral surface of the flange. It is installed in a position where it does not protrude. This is to prevent the protrusions from interfering with the core when the bobbin is rotated in the process of winding the coil wire around the bobbin.

The coil wire is wound by rotating the bobbin with one end of the coil wire wrapped around the first of the projections. After winding is completed, the other end of the coil wire
The end is attached to the second of the projections. In this way, there is no need to temporarily fix the end of the coil wire to the bobbin with adhesive. The bobbin wrapped around the coil wire is placed on a terminal block provided with a pin terminal. The protrusion is provided on the surface where the bobbin is placed, and the end of the coil wire wrapped around the protrusion is electrically connected to the pin terminal provided on the terminal block by means such as soldering, for example.

The protrusions are preferably made of a conductive material in order to make an electrical connection with the coil wire or the pin terminal by soldering, etc. However, the present invention will be described below with examples in which the protrusions may be made of an insulating material such as resin. An embodiment of such a fill component will be described with reference to the accompanying drawings along with a manufacturing method thereof.

In FIG. 1, a bobbin 1 consists of bobbin pieces 1a and lb, each of which has been divided into left and right halves in a direction parallel to the axis, each of which is molded with resin. This bobbin piece LA, LB
Flange portions 2a, 2b, gear portions 4a, 4b, and semicircular groove portions 5a, 5b are formed in the flange portions 2a, 2b and gear portion 4a.

4b are grooves 3a and 3b for winding the coil.
It's sharp. In addition, protrusions 6a, 6b are provided at the lower parts of the flanges 2a, 2b along the lR mounting surface of the bobbin 1.
It is provided at a position that does not protrude from the outer peripheral surface of 2b.

These protrusions 6a, 6b are made of resin or metal.

The core 10 is made of ferrite and is molded into a substantially square shape, and its negative side 10a is clamped by the bobbin pieces 1a and lb. That is, the bobbin pieces 1a and lb are the groove portions 5a.

5b sandwich and adhere one side 10a of the core 10, forming a substantially cylindrical bobbin 1. The groove portions 5g, 5b and the gear portions 4a, 4b are perfectly circular.

The first protrusion 6a (or protrusion 6b) has a coil wire 20
The bobbin 1 is allowed to rotate around one side 10a of the core 10 by twisting the winding start end and transmitting rotational force by meshing gears (not shown) with the gear parts 4a and 4b. Wind it around the grooves 3a and 3b. Once the coil is formed, the end of the coil is attached to the second protrusion 6b (or protrusion 6a).

On the other hand, the terminal block 11 is made of a resin molded product, and as shown in FIG.
It consists of inverted-shaped pin terminals 15 embedded in the four corners of 2a. Notches 12c are provided in the left and right side walls 12b, 12b.

12c is provided, and when the bobbin 1 is placed on the terminal block 11, the core 10 is inserted into the notches 12c, 12c to position the bobbin 1.

The bobbin 1 prepared in this way is placed on the terminal block 11 as shown in FIG. At this time, cream solder is applied in advance to the protrusions 6a and 6b surrounding the fill wire 20. The protrusions 6a and 6b are in contact with the head of the pin terminal 15 of the terminal block 11, and the solder reflow process is completed in this state. As a result, the insulating film on the twisted portion of the coil wire 2o is melted and removed, and the end of the coil wire 20 and the pin terminal 15 are removed.
and the protrusions 6a, 6b can be firmly fixed by solder and electrically connected.

In the above coil parts, the protrusions 6a and 6b are prevented from protruding from the outer peripheral surfaces of the bobbin flanges 2a and 2b, so even when the bobbin 1 is rotated, the protrusions 6g and 6b do not interfere with the core 10, and the coil There is no problem in winding the wire 2o. In addition, since the coil terminal tying work is performed on the protrusions 6a and 6b, automatic processing by a machine is easy. Further, since the pin terminal 15 provided on the terminal block 11 is attached to the end of the coil wire 20 that is hung between the protrusions 6a and 6b by means such as solder reflow, an in-line type coil component can be constructed.

Note that the coil component according to the present invention is not limited to the above embodiments, and can be modified in various ways within the scope of the gist.

The shape of the pin terminal is arbitrary and is not limited to the shape of the above embodiment.

Further, the protrusion does not necessarily need to be provided along the mounting surface, but may be provided perpendicularly to the mounting surface. When the protrusions are provided along the mounting surface, the structure becomes such that it can be used as a surface-mounted coil component, and parts can be shared, resulting in cost reduction. However, when using it as a surface mount type coil component, do not use a terminal block.

Furthermore, the electrical connection between the end of the coil wire and the pin terminal is not necessarily limited to soldering, and a conductive adhesive may be used.

As is clear from the above explanation, according to the present invention, a plurality of protrusions are provided on the bobbin flange on the bobbin mounting surface side and at positions that do not protrude from the outer peripheral surface of the flange. Since the end of the fill wire wound around the bobbin is tied to this protrusion, one end of the coil wire is tied to the protrusion and the winding process is performed, and then the other end of the coil wire is tied to the protrusion. can be attached to another protrusion, there is no interference between the protrusion and the core during the shunga process, and there is no problem with the rotation of the bobbin. There is no need to do this, and automatic processing of the karage work becomes easy. Further, since the pin terminal provided on the terminal block is connected to the end of the coil wire rod hanging from the protrusion, an in-line type coil component can be obtained.

[Brief explanation of the drawing]

1 and 2 are a perspective view of a bobbin and a terminal block, respectively, which constitute a coil component according to the present invention, and FIG. 3 is a front view showing a state in which the bobbin is placed on the terminal block. 1...Bobbin, la, lb...bobbin piece, 2a,
2b...flange, 6a, 6b...protrusion, 10...
Core, 10a... - side, 11... terminal block, 15...
・Bin terminal, 20...Coil wire material. Patent applicant Murata Manufacturing Co., Ltd.

Claims (1)

[Claims] 1. In a coil component having a substantially cylindrical bobbin in which one side of a substantially square-shaped core is held between a plurality of bobbin pieces divided in a direction parallel to the axis, a plurality of protrusions are provided on the flange of the bobbin. On the mounting surface side,
and provided at a position that does not protrude from the outer circumferential surface of the flange, and the end of the coil wire wound around the bobbin is tied to the protrusion,
A coil component, characterized in that the bobbin is placed on a terminal block provided with a pin terminal, and the end of the coil wire rod wrapped around the protrusion is electrically connected to the pin terminal provided on the terminal block.