JPH06105665B2 - Coil component manufacturing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a coil component used in various electronic devices.

2. Description of the Related Art Conventionally, this type of coil component has a configuration as shown in FIG. 5, FIG. 6, and FIG. In FIG. 5, 20 is a closed magnetic circuit core made of ferrite, 21 and 22 are bobbins formed by injection molding of polypropylene, 23 is a terminal plate formed by injection molding of phenol resin, and 24 is a terminal plate 23. Pin terminals, 25, which are planted in, are gears simultaneously formed on the peripheral surfaces of the bobbins 21 and 22. Further, in FIG. 6, 26 is a coil and 27 is a wire stopper using polyamide.

Further, in FIG. 7, 28 and 29 are lead grooves, 30, 31 are winding start leads, 25 is a gear, and 32 is a drive gear. As a conventional method for manufacturing a coil component configured as described above, the lead grooves 28 and 29 provided in the bobbins 21 and 22 are housed so that the tips of the lead-out leads do not come into contact with the magnetic core 20 when the bobbin rotates, and the gears Drive gear 32 is engaged with 25 and bobbin 2
Rotate 1,22 to start winding. After the winding is completed, the winding is fixed by a wire stopper 27 shown in FIG. 6 so as not to loosen.
After that, the winding start leads 30 and 31 are raised from the lead grooves 28 and 29, the terminal plate 23 and the bobbins 21 and 22 are fitted and fixed, and both the winding start lead and the winding end lead are wound around the pin terminal 24 and soldered. there were.

Problems to be Solved by the Invention In such a conventional configuration, the lead grooves 28 and 29 for accommodating the winding start leads 30 and 31 are required.
No. 8,29 was not required after manufacturing, the space of the coil part was restricted, the inductance decreased due to the decrease in the number of turns, or the DC resistance increased due to the decrease in the wire diameter, which was not preferable in terms of performance. In addition, the inside of the closed magnetic circuit core 20 is
Since 21,22 are rotated and wound, the pin terminals 24 cannot be planted directly on the bobbins 21,22.Therefore, the terminal plate 23 must be prepared for molding and the pin terminals 24 must be planted in advance. The number of parts increases and the cost increases. In this case, as a solution, there is a method of increasing the inner size of the closed magnetic circuit magnetic core 20 within a range in which the pin terminal 24 can rotate. However, the protruding size of the pin terminal 24 from the bobbins 21 and 22 is required to be 3 to 5 mm. As a result, the coil component originally having a height of about 10 mm becomes 15 to 17 mm, which is not practical. Further, as a drawback of the structure in which the bobbins 21 and 22 and the terminal plate 23 are separated, the winding start leads 30 and 31 are first accommodated in the lead grooves 28 and 29, and after the winding is finished, they are raised to raise the terminal plate 23 to the bobbin 2
It is necessary to wind around the pin terminals 24 after fitting to 1, 22. Similarly, the end-of-winding lead cannot be directly wound around the pin terminal 24, so it is necessary to fix it with the wire stopper 27.
After fitting the terminal plate 23 to the bobbins 21 and 22, it is necessary to wind it around the pin terminals 24. Such a manufacturing method includes a winding start lead,
Since the winding work of the lead at the end of the winding and the wiring work for pin winding are separated, mechanization is difficult and it becomes manual work,
It was not suitable for mass production, and there were many problems that the additional work increased and the cost increased.

The present invention solves such a problem. It is possible to directly provide the pin terminals on the bobbin without using the lead groove, improving the deterioration of the performance, and increasing the inner size of the closed magnetic circuit core. It is an object of the present invention to provide a method for manufacturing a coil component, which enables a mechanization of winding work and wiring work with a terminal plate-less structure, can be mass-produced at low cost.

Means for Solving the Problems In order to solve this problem, the present invention divides a magnetic core formed of a closed magnetic circuit into two coil bobbins each having a brim at both ends in the same direction as that of the magnetic core, and uses a divided portion. Then, a hole is formed inside the brim of this coil bobbin that penetrates both split coil bobbins in the same direction as the brim surface, and insert the pin terminal so that the coil winding start lead protrudes. Directly wind the coil bobbin by rotating the coil bobbin by winding the gear that rotates by the drive source on the gear part that is provided on the peripheral surface of the collar of the coil bobbin in advance, and directly on another pin terminal with the winding end lead protruding. After winding and soldering the pin terminal and the lead, the pin terminal is moved in the direction opposite to the soldered portion.

Action With this configuration, the lead groove and the terminal plate are not required, and the mechanization of the winding and wiring work is facilitated.

Embodiment FIG. 1 is an exploded perspective view of a coil component according to an embodiment of the present invention, in which 1 is a magnetic core formed in a square shape by ferrite, 2 and 4 are pin terminal through holes, and 3 and 5 are polypropylene. A bobbin having brims on both ends of the molded body is divided into two, and two bobbins are abutted to form one bobbin. Gears 6 and 7 are formed on one end of the bobbins 3 and 5 at the same time. FIG. 2 is a perspective view of the coil component before winding in which the pin terminal 8 is inserted by assembling FIG.
1 is a magnetic core, 8 is a pin terminal, 3 and 5 are bobbins, and 6 and 7 are gears. FIG. 3 is a perspective view of a completed coil component, where 1 is a magnetic core, 9 is a winding start lead, 10 is a pin terminal winding portion, 3 and 5 are bobbins, 8 is a pin terminal, 11 is a coil, 6 and 7 is a gear. Fig. 4 is a side view during the winding manufacturing process, in which 1 is a magnetic core, 10 is a pin terminal winding portion, 3,
5 is a bobbin, 9 is a winding start lead, 6 and 7 are gears, and 12 is a drive gear.

According to the method of manufacturing the coil component of the present invention configured as described above, the winding start lead 9 is attached to the pin terminal 8 inserted through the divided bobbins 3 and 5 so as not to contact the magnetic core 1. Is wound directly and wound. After the winding is finished, the winding end lead is also directly wound around the remaining pin terminal 8 and the winding portion is soldered, and then the pin terminal 8 is moved in the direction opposite to the winding soldered portion.

EFFECTS OF THE INVENTION As described above, according to the present invention, the lead groove unlike the conventional example is unnecessary, and the performances such as inductance and DC resistance are not deteriorated. In addition, by directly providing the pin terminals on the bobbin, the conventional terminal board can be eliminated, the cost can be greatly reduced, and since the winding work and the wiring work are not separated, mechanization is possible and mass production is easily performed. As a result, excellent effects such as lower cost can be achieved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a coil component according to an embodiment of the present invention, and FIG. 2 is a perspective view of a coil component according to an embodiment of the present invention in which FIG. FIG. 3 is a perspective view of a completed coil component according to an embodiment of the present invention, and FIG. 4 is a side view of a coil component according to an embodiment of the present invention during a winding process. FIG. 5 is an exploded perspective view of a conventional coil component, FIG. 6 is a perspective view of a conventional coil component completed by assembling FIG. 5, and FIG. 7 is a side view of a conventional coil component during a winding process. is there. 1 ... Magnetic core, 2, 4 ... Pin terminal through hole, 3, 5 ... Bobbin,
6,7 …… Gear, 8 …… pin terminal, 9 …… winding lead, 1
0 …… pin terminal winding part, 11 …… coil, 12 …… driving gear.

Claims (1)

[Claims] 1. A coil bobbin having a brim at both ends is divided into two parts in the same direction as the magnetic core in a magnetic core formed of a closed magnetic path, and the divided parts are fitted to each other, and a brim surface is provided inside the brim of the coil bobbin. A hole that penetrates both of the two split coil bobbins in the same direction as the pin bobbin is inserted, the pin terminal is projected and inserted, and the coil winding start lead is directly wound around the protruding pin terminal, and the gear is provided in advance on the peripheral surface of the collar of the coil bobbin. The gear that rotates by the drive source is engaged with the part, the coil bobbin is rotated and wound, and at the end of the winding, it is directly wound on another pin terminal with the protruding lead, the pin terminal and the lead are soldered, and then the pin terminal is attached. A method of manufacturing a coil component, wherein the coil component is moved in a direction opposite to the soldered portion.