JPH0227535Y2 - - Google Patents

Description

[Detailed Description of the Invention] Field of the Invention This invention relates to an improvement in the structure of a coil winding frame for, for example, a line filter.

Description of Prior Art FIG. 1 is a schematic perspective view showing an example of a line filter using a conventional coil winding frame. The line filter 1 includes a coil 3, which is placed around a resin case 2 that houses the ferrite core (not shown in FIG. 1) so as to cover the entire periphery of the ferrite core (not shown in FIG. 1).
4 are wound in opposite directions. In FIG. 1, reference numeral 5 indicates a partition, which is provided to prevent the coils 3 and 4 from coming into contact with each other. By the way, Figures 2 and 3
As shown in the exploded perspective view and cross-sectional view in the figures, the case 2 consists of a lid 6 and a main body 7, and the lid 6 and the main body 7 are formed with U-shaped grooves 6a and 7a, respectively. A core 8 is housed in the grooves 6a and 7a. Note that the partition portion 5 shown in FIG.
is constructed by combining a first partition part 9 and a second partition part 10 provided at the center of the lid 6 and the main body 7.

Since the conventional coil winding frame has the above-mentioned configuration, the lid 6 and the main body 7 that constitute the case 2,
The ferrite core 8 must be prepared separately, and therefore dimensional variations in each manufacturing process must be taken into consideration. In other words, the U-shaped groove 6 of the lid 6 and the main body 7 is designed so that the core 8 of the maximum size when considering variations can be accommodated.
a, 7a had to be always made larger. As a result, a considerable clearance exists between the ferrite core 8, the lid 6, and the main body 7, and the core 8 often rattles within the case 2.

Conventionally, in order to eliminate the above-mentioned rattling, a gap between the core 8, the lid 6, and the main body 7 is filled with
For example, an elastic material such as silicone rubber (not shown)
It was also practiced to insert . However, since it involves inserting silicone rubber, etc., extra work is required, extra materials are required, which increases costs, and the design must be designed with the insertion of an elastic body in mind. Various drawbacks existed, including the need for extra care and reduced reliability. Moreover,
Even if such an elastic body is used, the core 8
It was impossible to reliably eliminate the rattling.

Purpose of the invention The purpose of the invention is to eliminate the above-mentioned drawbacks and to provide an inexpensive coil winding frame having a structure capable of supporting the core without rattling it.

Structure of the invention This invention provides a coil winding frame that is divided into a first and a second divided body and has a case that stores a core therein, and a core is placed inside at least one of the first and second divided bodies. This coil winding frame is characterized in that it is provided with a support piece that supports the core, and that the support piece supports the core by being deformed along the shape of the core.

Since the case is divided into "first and second divided bodies", the lid 6 and main body 7 of the conventional coil winding frame shown in FIGS. 2 and 3 are different from each other.
It may be something like this, or it may be made up of divided bodies of approximately equal size.

The "support piece" only needs to be provided "inside at least one of the first and second divided bodies",
Therefore, it may be provided on both the first and second divided bodies, or it may be provided only on one side. In addition, the "support piece" is something that "supports the core by being deformed along the shape of the core", that is, it supports the core by being deformed along the shape of the core inserted into the first and second divided bodies. The shape does not matter as long as it prevents the core from wobbling when it is bent and deformed.

DESCRIPTION OF EMBODIMENTS FIGS. 4 and 5 are diagrams for explaining an embodiment of this invention, in which FIG. 4 is a partially cutaway perspective view of one of the divided bodies, and FIG. A plan view of the illustrated divided body is shown. As is clear from FIGS. 4 and 5, the lower divided body 7 constituting the case 2
For example, triangular supporting pieces 11a to 11f of 0.1 to 0.3 mm are integrally formed with the divided body 7 at the inner lower part thereof. Therefore, the support piece 11a
...11f can be formed from the same material as the divided body 7 and at low cost without significantly increasing the required amount of material. Support pieces 11a...11f
As shown in FIG. 5, they are arranged in pairs at three equally spaced positions in the circumferential direction of the divided body 7.

FIG. 6 is a schematic partial cutaway sectional view for explaining the core storage process in the embodiment shown in FIGS. 4 and 5. FIG. In addition, in FIG. 6, the thickness of the divided body is illustrated to be thicker for easier understanding. In this embodiment, to store the core 8, the core 8 is first positioned and inserted into one of the divided bodies 7. At this time, as is clear from FIG. 6a, the lower end of the core 8 comes into contact with the support pieces 11a and 11b. Next, the other divided body 6 is placed over the core 8. Next, if the other divided body 6 is pressed downward from the state shown in FIG.
(see Figure 6b). This occurs because the supporting pieces 11a and 11b are formed as thin as 0.1 to 0.3 mm as described above. Therefore, if the other divided body 6 is further pressed downward, as shown in FIG.
is reliably supported within the case 2 without wobbling. This is because the support pieces 11a and 11b support the core 8 by being deformed along the outer shape of the core 8.

In addition, in the embodiment described with reference to FIGS. 4 to 6, as shown in FIG.
Although the supporting pieces a...11f are arranged in pairs at three equal parts in the outer circumferential direction of the divided body 7, the support pieces of this invention are not limited to being arranged in this way. That is, the support pieces 11a...11f do not necessarily need to be arranged in pairs, and therefore may be formed only on one side so as to contact only the inside or outside of the core 8, and it is not necessary to support them at three points. Any number of support pieces may be provided. Furthermore, it is not necessary to use only the deformable supporting piece which is a feature of this invention as described above, and it may be combined with a hard protrusion which is not deformable, that is, which regulates the position of the core. For example, only one deformable support piece may be formed and the other protrusions may be rigid. Further, in the embodiments shown in FIGS. 4 to 6, the lower divided body 7 is provided with a support piece, but the other divided body 6 may be provided with a support piece, or both parts may be provided with a support piece. Needless to say, it's a good thing. In short, various combinations can be made depending on the shape of the core and the degree of deformation of the support piece.

Effects of the invention As described above, according to this invention, a support piece for supporting the core is provided inside at least one of the first and second divided bodies, and the support piece extends along the shape of the core. Since the core is supported by being deformed, it is possible to reliably prevent the core from wobbling within the case, and it does not require extra work like the conventional method of inserting an elastic body. Since this is not necessary, it is possible to greatly contribute to cost reduction.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing an example of a line filter using a conventional coil winding frame. Second
This figure and FIG. 3 are an exploded perspective view and a sectional view showing the process of inserting the core into the coil winding frame shown in FIG. 1. FIG. 4 is a partially cutaway perspective view of one of the divided bodies used in an embodiment of this invention. FIG. 5 is a plan view of the divided body shown in FIG. 4. 6th
This figure is a partially cutaway sectional view showing the process of inserting a core into a coil winding frame using the divided bodies shown in FIGS. 4 and 5. In the figure, 2 is a case, 6 and 7 are first and second divided bodies, 8 is a core, and 11a...11f are supporting pieces.

Claims (1)

[Claims for Utility Model Registration] In a coil winding frame consisting of a case that is divided into first and second divided bodies and stores a core inside, A coil winding frame characterized in that a support piece is provided to support the core, and the support piece supports the core by being deformed along the shape of the core.