JPH0442886Y2 - - Google Patents

Description

[Detailed description of the invention] [Overview of the field] The present invention is a coil bobbin in which the core is held by a winding frame without the need for a core holder when assembling a split closed magnetic circuit core to make a transformer coil. Regarding the structure of

[Contents and problems of conventional technology]

Conventionally, this type of coil bobbin has a split closed magnetic circuit core (hereinafter referred to as core) 10 as shown in FIG.
was inserted into the center hole of the winding frame, and the core was fixed under pressure using a holder 9. In automating the assembly of the series of transformers and coils described above, the use of the holder 9 requires a separate holder supply mechanism, as well as a complicated mechanism for inserting the holder into the core.

[Purpose of invention]

In order to eliminate these drawbacks, the present invention integrally molds the flange that pressurizes and fixes the core to the coil bobbin.
The purpose of the present invention is to provide a novel coil bobbin in which a divided closed magnetic circuit core is assembled into a winding frame without using a holder.

[Structure of the idea]

The present invention is constructed by integrally molding a flange on the coil bobbin in the lengthwise direction of the legs of the core so that the core to be inserted into the coil bobbin is fixed under pressure from the outer surface in the lengthwise direction of the legs of the core. That is, the present invention provides a coil bobbin in which flanges are provided at both ends of a cylindrical winding frame, and a split closed magnetic circuit core is inserted into the center hole of the winding frame.
A coil bobbin characterized in that an insertion groove into which the core leg part is inserted is formed in both end flanges, and a core yoke part insertion groove for rotating the core from the insertion groove and pressing and fixing the core yoke part.

[Explanation based on examples]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of an embodiment of the present invention;
FIG. 2 is a plan view of FIG. 1 viewed from above.

In the conventional coil bobbin, the flanges 1 on both sides of the winding core 2 are integrally molded, but in the present invention, the flanges 4 are added and integrally molded. The collar 4 is protruded so as to provide a core yoke part insertion groove 5 and a core leg part insertion groove 6. FIG. 4 is a perspective view showing the core assembly in progress. The split closed magnetic circuit core 10 is inserted into the coil bobbin in the direction of the arrow, and after the core is fitted, the core leg portion 8 is rotated in the direction of the arrow B. The core yoke part 7 is inserted into the core yoke part insertion groove 5 by this rotation.
By providing a slope 11 on the collar 4, the core is pressurized from both outsides in the direction of the winding core when the core is inserted.

FIG. 3 is a perspective view of the assembled device.

FIG. 5 shows another embodiment in which the assembled core is fixed in a horizontal position.

[Effect of idea]

As described above, according to the present invention, the number of parts of the holder can be reduced by one, making it possible to reduce the number of man-hours for parts procurement and simplify assembly. Automatic assembly eliminates the need for a component supply mechanism for the holder.
Core insertion can also be handled using only the conventional core insertion extension mechanism, and does not require a separate mechanism unlike the use of conventional holders.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the coil bobbin of the present invention. FIG. 2 is a plan view of FIG. 1. FIG. 3 is a perspective view of a core assembled using the coil bobbin of the present invention. FIG. 4 is an exploded view of the assembly process leading to FIG. 4. FIG. 5 is a perspective view of another embodiment using the coil bobbin of the present invention and holding a split closed magnetic circuit magnetic core. FIG. 6 is a perspective view of a conventional coil bobbin that uses a holder to hold a divided closed magnetic circuit magnetic core. 1... Tsuba, 2... Winding core, 3... Pin terminal, 4...
...Flame, 5...Core yoke part insertion groove, 6...Core leg part insertion groove, 7...Core yoke part, 8...Core leg part, 9...Holder, 10...Divided closed magnetic circuit core, 11... Slope.

Claims (1)

[Scope of utility model registration request] In a coil bobbin configured such that flanges are provided at both ends of a cylindrical winding frame and a split type closed magnetic circuit core is inserted into a central hole of the winding frame, insertion grooves for inserting the core legs into the flanges at both ends, and this insertion groove are provided. A coil bobbin characterized in that a core yoke part insertion groove is formed for further rotating the core and pressing and fixing the core yoke part.