JPH058653Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a ferrite core used in high frequency transformers and coils.

[Conventional technology]

Generally, this type of core is not particularly provided with a cover so that the windings are exposed.

[Problem that the invention attempts to solve]

For this reason, it is difficult to handle the transformer or coil, for example, to assemble it onto a board, and non-uniformity of stray capacitance is unavoidable.

Therefore, in this invention, it is easy to assemble to the board,
Another object is to provide a ferrite core with uniform stray capacitance.

[Means for solving problems]

In order to achieve this objective, the present invention provides a ferrite core made by combining a ferrite core and a pair of covers so that the shape when assembled forms a rectangular parallelepiped. a ferrite core having a cover holding part, a wire winding part in the center and a locking step; and a cover holding part having a locking piece that engages with the step of the ferrite core. A ferrite core with a cover is provided with an upper cover and a lower cover which are held in the ferrite core and combined with the ferrite core to form a rectangular parallelepiped or a substantially rectangular parallelepiped.

[Effect]

The ferrite core is manufactured by winding a winding around the winding portion of the ferrite core, and then engaging each locking piece of a pair of covers consisting of an upper cover and a lower cover with the locking stepped portion of the ferrite core. A rectangular parallelepiped-shaped transformer or coil can be formed by combining the transformer and a pair of covers.

[Effect of idea]

As mentioned above, the present invention uses a ferrite core whose overall shape is almost rectangular and which has a cover holding part and a winding winding part in a predetermined part, so the winding can be wound in a prescribed position and route. A transformer or inductor can be configured as specified, and the ferrite core is covered with a cover so that the overall shape is almost a rectangular parallelepiped, making it easy to assemble to a board and protecting the windings from damage. can do.

Further, since the winding wire draw-out portion is formed in the cover, variations in stray capacitance can be prevented by pulling out the winding end portion from this draw-out portion.

Furthermore, since the cover is provided with mounting legs, the positional relationship between the winding device and the object to which it is attached can be set correctly, and unexpected stray capacitance will not occur.

〔Example〕

FIG. 1 is an exploded view of one embodiment of the present invention.
0 is a ferrite core, on which an insulating material such as a plastic upper cover 21 and a lower cover 2 are attached.
2 are combined. The ferrite core has a wire winding part 12 at the center of the frame part 11, guide parts 14 at four corners, and locking step parts 13 at the sides. On the other hand, the pair of covers 21 and 22 both have the same shape and are assembled to the ferrite core 10 so as to sandwich them from both the upper and lower sides in the figure. The covers 21 and 22 have a substantially rectangular planar shape, and locking pieces 21A and 22A are provided on two opposing sides, and abutting portions 21B and 22B are provided on the other two opposing sides. At this time, the locking pieces 21A and 22A of the upper cover 21 and the lower cover 22 are locked to the locking step 13, and both covers 21 and 22 are firmly fixed to the ferrite core. The tips of the abutting portions 21B and 22B abut against each other to support the central portions of the covers 21 and 22. In addition, these butt portions 21B, 22B and the cover holding portion 1
A hole is formed at the boundary with 4 for passing the lead-out portion of the winding. This winding lead-out portion may be connected to a terminal provided, for example, on the side surface of the cover holding portion 14 using a conductive paste or the like.

This forms a rectangular parallelepiped transformer or coil. A board or the like can be attached to this transformer or the like using the legs 22C of the lower cover 22.

FIG. 2 is a perspective view showing the assembled configuration of the embodiment shown in FIG. As shown in the figure, an upper cover 21 and a lower cover 22 are combined with the ferrite core 10 from above and below to form a rectangular parallelepiped as a whole. Since the four corners of this rectangular parallelepiped are the cover holding parts 14 of the ferrite core 10, strength can be given to the ferrite core, and deformation can also be prevented. 30 is a winding lead-out part.

FIG. 3 is an enlarged view of this winding lead-out section. The winding pull-out part 30 is drawn out to the outside through a hole formed between the cover holding part 14 of the ferrite core and the abutting parts 21B and 22B of the upper cover and the lower cover.

[Brief explanation of the drawing]

Fig. 1 is an exploded view of one embodiment of the present invention, Fig. 2 is a perspective view showing the assembled shape of the embodiment of Fig. 1, and Fig. 3 is an explanatory diagram showing an enlarged view of this winding lead-out part. It is. 10... Ferrite core, 11... Frame part, 12... Winding winding part, 13... Locking part, 14
...Cover holding part, 21, 22...Cover, 21
A, 22A... Locking piece, 21B, 22B... Butt portion, 22C... Mounting leg, 30... Winding pull-out portion.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A ferrite core having a substantially rectangular shape and having cover holding portions at each of the four corners, a wire winding portion at the center, and locking step portions on the outer periphery of each side; A ferrite core with a cover, comprising an upper cover and a lower cover that have a locking piece that engages with the stepped portion of the ferrite core, are held by the cover holding portion, and are combined with the ferrite core to form a rectangular parallelepiped or a substantially rectangular parallelepiped. . 2 Utility Model Registration The ferrite core according to claim 1, wherein both the covers have a hole at the boundary with the ferrite core through which the winding lead-out part of the winding winding part is inserted. 3. The ferrite core according to claim 1 of the utility model registration, wherein either one of the covers has legs for attachment.