JPH0828303B2 - Manufacturing method of coil parts - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a coil component used in a transformer or the like used in various electronic devices.

2. Description of the Related Art As a conventional method for manufacturing a coil component, as shown in FIG. 6, there are flanges 1 and 2 at both ends, and a terminal 3 is planted on one of the flanges 2 to form a terminal plate. Inserting a prismatic winding shaft 8 having a collar 7 into the angular hollow portion of a coil bobbin 6 having a winding drum portion 5 having a step 4 between the collars 1 and 2 and rotating the winding shaft 8. The winding 9 is wound around the winding barrel portion 5 of the coil bobbin 6.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In such a method, the dimensions a and b of the step 4 portion of the winding barrel portion 5 of the coil bobbin 6 are determined by
As shown in the figure, when it is installed in a transformer, it is used as an insulation distance between the winding 9 and the magnetic core 10, which increases the height of the transformer itself by several millimeters and the coil bobbin 6
There is a problem that the structure of the molding die is complicated, the die manufacturing is expensive, the amount of the molding resin of the coil bobbin 6 is large, and the cost is disadvantageous.

The present invention eliminates the above-mentioned conventional defects, is easy to manufacture as a coil bobbin with a simple structure and is inexpensive, suppresses the height as a coil component, and secures a sufficient insulation distance even when used as a transformer. The present invention is intended to provide a method of manufacturing a coil component that can be manufactured.

Means for Solving the Problems In order to solve the above problems, the present invention provides a coil bobbin provided with a cylindrical winding drum portion on an upper surface of a terminal plate having terminals, and a tip of the winding drum portion in a recess of a winding shaft. The coil bobbin is mounted by inserting it, and the winding is wound around the winding body of the coil bobbin.

When the above method is used and the winding position of the winding is determined by the dimension of the coil bobbin that fits in the winding shaft of the winding body, and the distance from the tip of the winding body is maintained at a specified amount and the transformer is used. A sufficient insulation distance between the magnetic core and the winding can be secured, and a simple shape can be used as the coil bobbin, and the height can be reduced and the coil bobbin can be made small and inexpensive.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings 1 to 5.

In FIG. 1, reference numeral 11 is a coil bobbin formed by molding synthetic resin, and this coil bobbin 11 has a collar and a terminal 12
A terminal plate 14 in which a lead wire groove 13 is provided on a side surface thereof, and a rectangular tube-shaped winding body portion 15 on an upper surface of the terminal plate 14.

Reference numeral 16 denotes a winding shaft provided with an angular recess 17 into which the front end of the winding barrel portion 15 of the coil bobbin 11 is fitted.
The winding bobbin portion 15 of the coil bobbin 11 is fitted into the coil 17, and the winding shaft 16 is rotated to wind the winding 18 with the end face of the winding shaft 16 as the winding start. The lead wire at the end of winding is wound around the terminal 12 through the lead wire guide groove 13 of the terminal plate 14 and connected by soldering or the like to complete the coil component.

2 and 3, the taper portion 17a is provided at the opening end of the concave portion 17 of the winding shaft 16 so that the end portion of the winding 18 can be laminated in a pyramid shape.
It is possible to prevent collapse at the end of the winding wire 18.

Further, when the winding body 15 of the coil bobbin 11 is cylindrical,
This can be dealt with by making the recess 17 of the winding shaft 16 circular as shown in FIG.

The winding shaft 16 is removed after the winding 18 is wound around the coil bobbin 11.

When the coil component manufactured by the above-mentioned method is used for a transformer, it becomes as shown in FIG. That is,
A coil is formed by incorporating an EI type or EE type magnetic core 19 into the coil bobbin 11 around which the winding 18 is wound. The insulation distance between the magnetic core 19 and the winding 18 is from the tip of the winding barrel 15 to the winding shaft 16 Since it is located below the depth of the recess 17, it can be sufficiently secured.

Therefore, the coil bobbin 11 can be reduced in height by the absence of one of the collars, and the coil bobbin 11 can be made extremely simple in shape, which facilitates molding and is significantly advantageous in terms of cost.

EFFECTS OF THE INVENTION As described above, according to the present invention, the winding shaft is removed after the winding shaft is detached after the winding shaft having the recess is fitted with the tip of the winding barrel portion of the coil bobbin having the terminal plate only at one end. The winding position is determined by the amount of fitting of the winding body that fits in the recess of the shaft, and when using it for a transformer, the height can be reduced by eliminating one flange and the insulation between the magnetic core and the winding can be reduced. Since the distance can be reliably maintained, the shape of the coil bobbin is simple, and the manufacturing is easy, which simplifies the molding die and reduces the amount of molding resin, which is advantageous in terms of cost. It is of great industrial value because it can be manufactured and provided with high precision.

[Brief description of drawings]

FIG. 1 is a sectional perspective view of a coil component manufacturing method of the present invention during winding, FIG. 2 is a sectional view of another embodiment, and FIGS. 3 and 4 are used for the present invention. FIG. 5 is a perspective view showing an example of a shaft, FIG. 5 is a perspective view of a transformer using a coil component obtained by the same method, FIG. 6 is a sectional perspective view showing a conventional method for manufacturing a coil component, and FIG. 7 is the same method. It is a perspective view of a transformer using the coil component obtained by. 11 …… Coil bobbin, 12 …… Terminal, 14 …… Terminal plate, 15…
… Cylinder body, 16 …… Winding shaft, 17 …… Recessed part, 17a… Tapered part, 18 …… Winding.

Claims (1)

[Claims] 1. A coil bobbin having a cylindrical winding drum portion provided on the upper surface of a terminal plate having terminals is attached by fitting the tip of the winding drum portion into the recess of the winding shaft, and the winding amount is adjusted according to the amount of insertion. A method for manufacturing a coil component, in which a winding position is determined, a winding is wound around a winding body of the coil bobbin, and then the winding shaft is removed.