JPH03141613A - Manufacture of coil parts - Google Patents

Abstract

PURPOSE:To facilitate the automation of wrapping by press-fitting a pipe, at a position where it does not project from the periphery of a flange, into the flange of a bobbin, and wrapping the end of a line material on the pipe, and then inserting a terminal into the pipe so as to connect it with the line material end. CONSTITUTION:The bobbin 1a and 1b, split up and down in two, of a bobbin 1 are provided with flanges 2a and 2b, gears 4a and 4b, grooves 5a and 5b, and grooves 3a and 3b in which to wind coils. A pipe 15 consisting of conductive material is press-fit in the holes 6a and 6b of a core 10. The pipe 15 is of the length of not projecting from the flanges 2a and 2b, and both ends of it are exposed to the step parts 7a and 7b where the flanges are cut off. The winding start of a coil material 20 is wrapped on the exposed part of the pipe 15, and torque is transmitted to the gears 4a and 4b so as to rotate the bobbin 1, centering on one side 10a of the core 10, and the line material 20 is wound in the grooves 5a and 5b, and the end is wrapped on the exposed part of the pipe 15. A terminal 16 is inserted in the pipe 15, and the end of the line material 20, the pipe 15, and the terminal 16 are connected by soldering.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing coil parts used in coilers, oscillators, and the like.

BACKGROUND OF THE INVENTION Conventionally, various pobin-divided choke coils have been provided as choke coils. 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 coil wire material 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 manufacturing method, 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 there is also the problem that it is difficult to automate the tying process. It has points.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for manufacturing a coil component in which the step of temporarily fixing the end of the coil wire material to the bobbin with an adhesive is omitted, and the tying operation can be easily automated.

Means and Effects for Solving the Problems In order to solve the above problems, the method for manufacturing a coil component according to the present invention involves forming a conductive pipe on the flange of the bobbin in a conventional bobbin split type coil component. Press fit into the hole. The vibrator is press-fitted with its end exposed at a position that does not protrude from the outer peripheral surface of the collar. This is to prevent the pipe from interfering with the core when the bobbin is rotated in the subsequent coil wire winding process. The coil wire is wound by hanging the end of the coil wire on the exposed portion of the pipe and rotating a bobbin.

After winding, the terminal can be completely inserted into the vibrator, and the end of the coil wire, the pipe, and the terminal can be electrically connected, for example, soldered.

EXAMPLES Hereinafter, examples of the method for manufacturing a coil component according to the present invention will be described with reference to the accompanying drawings.

In FIG. 1, a bobbin 1 consists of bobbin pieces 1a and lb which are divided into upper and lower 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 is said that Furthermore, holes 6a, 6a, 6b, and 6b are formed in the flanges 2a and 2b, passing through them in the vertical direction.

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 piece 1a, lb has the groove gTI5a,
5b sandwich and adhere one side 10a of the core 10 to form a substantially cylindrical bobbin 1. Groove portions 5a, 5b, gear portion 4
a.

4b is a perfect circle, and holes 6a and 6b are one through hole (four in total).

Next, as shown in FIG. 2, pipes 15 made of a conductive material are press-fitted into the holes 6a and 6b. Vibrator 15 has flange 2
A stepped portion 7a has a length that does not protrude from the outer circumferential surface of the flange portions 2a and 2b, and both ends thereof are cut out in the collar portions 2a and 2b.

7b will be exposed.

Next, as shown in FIG. 2, the winding start end of the coil wire 20 is tied to the exposed part of the vibrator 15, and the gear parts 4a, 4 are attached.
By meshing gears (not shown) with b and transmitting rotational force, the bobbin 1 is moved between the core 10 (7) and the side IQ.

The coil wire 20 is rotated around the two grooves 5a.
, 5b. Once the coil is formed, the end of the coil is attached to the exposed portion of the other vibrator 15.

Next, as shown in FIG. 3, a terminal 16 made of wire is inserted into the vibrator 15, and the ends of the coiled wire are soldered. As a result, the coil end, the pipe 15, and the terminal are electrically tangentially connected.

In the above manufacturing method, the vibrator 15 is interposed and the end of the pipe 15 is set so as not to protrude from the outer peripheral surface of the bobbin collar 2a * 2b, so even if the bobbin 1 is rotated, the pipe 15 will not interfere with the core 10. There is no problem in winding the coil wire 20. Moreover, since the coil terminal tying work is performed on a short exposed portion of the vibrator 15, automatic processing by a machine is easy. Further, since the terminal 16 is installed by being inserted into the vibrator 15, a terminal block is not required, and a compact choke coil can be constructed.

In the above embodiment, both ends of the pipe 15 are exposed, but it is sufficient that only at least one end is exposed. Therefore, as shown in FIG.
A half-long vibrator 15' may be press-fitted into this hole 6a. Alternatively, as shown in FIG. 5, a half-long vibrator 15' may be press-fitted into only one hole 6a.

Effects of the Invention As is clear from the above explanation, according to the present invention, a pipe is press-fitted into the flange of a bobbin at a position where it does not protrude from the outer peripheral surface of the flange, and the end of the coil wire material is first tied to the pipe. Since the terminal is then inserted into the pipe to make an electrical connection with the end of the wire, there is no interference between the vibrator and the core during the winding process, and there is no problem with the rotation of the bobbin. Of course, there is no need to temporarily fix the ends of the wire to the bobbin with adhesive as in the past, and automatic processing of the tying work is also facilitated. Further, a terminal block for attaching the terminals is not required, and a small coil component can be obtained.

[Brief explanation of the drawing]

The drawings show the state in the middle of each process of the manufacturing method according to the present invention. Figure 1 is a perspective view when assembling the bobbin, Figure 2 is a half-sectional view during the winding process, and Figure 3 is a diagram when inserting the terminal. It is a half sectional view. FIGS. 4 and 5 are cross-sectional views showing modified examples of the pipe engineering form, respectively. 1...Bobbin, la, lb...bobbin piece, 2a,
2b...flange, 6a, 6b...hole, 10...core, 10th...-side, 15...pipe, 16...terminal.

Claims (1)

[Claims] 1. A step of constructing a substantially cylindrical bobbin by clamping one side of the roughly square-shaped core with a plurality of bobbin pieces divided in a direction parallel to the axis, and forming a conductive pipe on the flange of the bobbin. In the hole where
a step of press-fitting the end of the pipe in an exposed position where it does not protrude from the outer peripheral surface of the flange; a step of twisting the end of the coil wire into the exposed portion of the pipe; and a step of rotating the bobbin to form the coil. The method comprises the steps of: winding a wire around a bobbin; and after the winding step, inserting a terminal into the pipe and electrically connecting the end of the coil wire, the pipe, and the terminal. A method for manufacturing a coil component characterized by: