JPH0349372Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an inductance element, particularly a miniature inductor.

(Prior art and its problems) Conventional miniature inductors cannot have a bobbin with terminal pins because the flanges of the bobbin cannot be thickened, and a terminal block is used separately from the bobbin. FIG. 5 shows a conventional example in which a winding 2 is applied to a bobbin 1, and pot-shaped cores 3a, 3
This required the troublesome process of fitting the lead wire b into the terminal block 4, fixing it to the terminal block 4 with an adhesive or using a fastening fitting 5, and then tying the lead wire to the terminal pin and soldering it.

Although FIG. 6 is not a miniature inductor, the bobbin 6 and the terminal block 7 are integrally configured,
After winding the bobbin 6, the pot-shaped core 8 is
It is known that a and 8b are fitted to form an inductor.

The present invention has been made in order to improve the above-mentioned conventional problems, and aims to provide an inductance element that can be assembled efficiently and can be automated.

(Structure of the invention) In order to achieve the above object, the bobbin and the terminal block are integrated, and the core is a combination of a plate-shaped core and a core having a cylindrical leg in the center.

(Function) Since the bobbin and terminal block are integrated, the coil can be used as a single unit for winding, tying the terminal of the lead wire, and soldering.All that is left is to attach the core and assemble it. efficiency is greatly improved.
It also makes it possible to automate assembly.

(Example) Figure 1 shows an example of the present invention.
11 is a bobbin, and 12 is a terminal block, both of which are integrally constructed. That is, the terminal block 12 has thick parts 12a and 12b in which the terminals 13 are implanted, respectively, on a pair of opposing sides, and the bobbin 11 is connected to the terminal block 12 through a predetermined space 14. Opposing ends of one of the brims are connected to thick portions 12a and 12b, respectively. The bobbin and the terminal block may be integrally formed by resin molding, or may be formed separately in advance and fixed together with an adhesive or the like. After winding the bobbin 11 and connecting the lead wires to the terminals 13 and soldering them, a plate-shaped ferrite core 15 is inserted into the space 14. Small protrusions 16 are provided on another set of sides different from the thick part of the terminal block 12, so when the plate-shaped core 15 is inserted, these small protrusions 16 serve to prevent the core from coming off. accomplish Numeral 17 is a ferrite core having a cylindrical leg 17a in the center, which is placed over the bobbin 11 to accommodate the coil together with the plate-shaped core. The ferrite core 17 has a cutout window 18 on a pair of opposing sides, and the cutout window 18 is located at the lead-out portion of the lead wire as shown in FIG. This lead wire drawer is
It is located at the joint between the bobbin 11 and the terminal block 12. Note that one surface of the notch 18 of the ferrite core 17 is parallel to the bottom surface of the core, and the side surfaces on both sides thereof are inclined so as to widen toward the bottom surface. With this shape, uniform pressure can be applied during the pressing process during core production, and chipping at the corners can be prevented. Although the core 17 is box-shaped here, it may also be cylindrical.

The core containing the coil is fixed with a locking fitting 19. This locking metal fitting 19 may be a single piece with left and right sides integrated, or may be separate pieces. The end of the locking metal fitting 19 is hooked into a recess 20 for hooking the locking metal fitting formed on the back surface of another set of sides different from the thick portion of the terminal block 12. If the left and right locking fittings are separate, a hooking recess is also provided on the top surface of the ferrite core 17.
In addition, cores 15 and 17 can be connected without using locking metal fittings.
The contact portions may be fixed using an adhesive. The terminal block 12 has an opening 21 on the bottom side of a plate-shaped core inserted into the space. Therefore, the plate core 15
is supported only at its periphery. By configuring the terminal block 12 in this manner, it is possible to reduce the weight and also to save on materials.

FIG. 3 shows another embodiment of the terminal block. The connection part of the terminal pin 13 to the board etc. in the one in FIG. 1 extends in the vertical direction, whereas the one in FIG. This is an example of a surface mount type in which the terminal pin 23 extends in the lateral direction.

Figure 4 shows another embodiment of the core having a cylindrical leg in the center, and whereas the coil storage part of the core in Figure 1 is circular to fit the coil,
The figure shows an example in which the storage portion 24 has a rectangular shape to match the outer shape of the core.

(Effects of the invention) As explained in detail in the above embodiments, the present invention integrates the bobbin and the terminal block, inserts a plate-shaped core into the space between the bobbin and the terminal block,
Since the structure is such that the core with cylindrical legs is placed over the bobbin to store the coil, it is possible to carry out the entire process from winding to connecting the lead wire terminals to soldering. All you have to do is fit it in and fix it with the locking metal fittings, which can greatly improve assembly efficiency. Further, by adopting this assembly process, there is an advantage that automation is possible.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of one embodiment of the present invention, FIG. 2 is an external view of the same after assembly, and FIG. 3 is a perspective view of another embodiment of the terminal block with an integrated bobbin. Fourth
This figure is a perspective view of another embodiment of the core having a cylindrical leg, and FIGS. 5 and 6 are exploded perspective views of the conventional example. 11... Bobbin, 12... Terminal block, 12a, 1
2b... Thick part, 13, 23... Terminal pin, 14
. . . Space portion, 15 .
…Aperture.

Claims (1)

[Claims for Utility Model Registration] (1) A terminal block having a thick wall portion with terminals embedded in each of a pair of opposing sides, and one side with a predetermined space between the terminal block and the terminal block. A bobbin whose opposing ends of the collar are respectively connected to the thick portion is integrally constructed, and a coil wound on the bobbin is inserted into the space from above the plate-shaped core and the bobbin. An inductance element characterized by being housed in a core having a cylindrical leg at the center thereof. (2) A request for registration of a utility model characterized in that the terminal block has a small protrusion on a set of sides different from the thick wall portion for locking a plate-shaped core inserted into the space. The inductance element according to the range (1). (3) The terminal block is characterized in that the terminal block has a recess on the back surface of another set of sides different from the thick part for hooking the end of the locking metal fitting of the core housing the coil. Scope of claim for utility model registration (1)
The inductance element described in section. (4) The inductance element according to claim 1, wherein the terminal block has an opening on the bottom side of a plate-shaped core inserted into the space. (5) The utility model as set forth in claim (1), characterized in that a joint portion between the thick wall portion of the terminal block and one collar of the bobbin constitutes a lead wire pull-out portion of the coil. inductance element.