JPH0343690Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to the structure of a coil bobbin, and particularly to the structure of a coil bobbin using an E-shaped core.

[Prior art]

Some coil bobbins have a structure in which a cylindrical winding core and flanges projecting in the radial direction of the winding core are provided at both ends of the cylindrical winding core. By the way, this type of coil bobbin is manufactured by winding a winding core, inserting the central leg of an E-shaped core into the center hole of the winding core, and arranging an I-shaped core such that the ends of each leg are connected. It is used as an inductor.

Here, an inductor using a conventional coil bobbin will be outlined with reference to FIGS. 1 and 2.

The illustrated coil bobbin is composed of an electrically insulating rectangular cylindrical winding core 1 and flanges 2 and 3 that extend in the radial direction of the winding core at both ends of the winding core 1. A plurality of pin terminals 4 are provided along the determined opposing sides as shown in the figure. The flange 3 has a winding core 1 between the pin terminals 4.
A groove portion 32 is provided facing toward. Further, on a predetermined opposite side of the flange 2, there is a groove 23 facing toward the winding core 1.
is provided.

The winding core 1 of the coil bobbin with the above structure has a winding 6
The winding 6 is provided with a plurality of so-called taps (not shown). Lead wires (not shown) from the taps on the input side are passed through the groove 32, wrapped around the pin terminal 4, and soldered.
The lead wires from the taps (multiple) on the output side are
As shown in a partially cutaway view of FIG. 1, a covered wire 9 is connected and soldered on the winding core 1 (insulation treatment is also performed), and the wire 9 is drawn upward through the groove 23. E-type core 7 to center hole 11 of winding core 1
The I-type core 8 is arranged and fixed so as to connect the ends of each leg of the E-type core 7, and the winding core 1
An insulating tape 5 is wrapped around the core corresponding to the inductor.

However, when a coil bobbin with the above structure is used, it is extremely troublesome to connect the output end of the winding to the wire as described above, and furthermore, in order to increase the upward tensile strength as shown in FIG. However, there is a problem that the connection between the output end and the wire becomes thick.

[Purpose of invention]

An object of the present invention is to provide a coil bobbin that allows easy connection of windings and external lead wires and has a strong tensile strength.

[Structure of the idea]

The structure of the present invention is a coil bobbin having an insulating cylindrical winding core and flanges projecting in the radial direction of the winding core at both ends of the cylindrical winding core. A plurality of pin terminals are provided extending outward in parallel with the winding core along the edge, and the pin-shaped terminal provided at least on one of the flanges is formed into an L-shape. This is a coil bobbin in which a pin terminal is attached with one end facing toward the center of the flange.

[Example of idea]

The present invention will be described below based on examples.

First, the structure of the coil bobbin will be explained with reference to FIG. 3. An electrically insulating rectangular cylindrical winding core 1 has insulating square flanges 2 and 3 extending in the radial direction of the winding core at both upper and lower ends, respectively. It is provided. A plurality of pin-shaped terminals 4 are provided at equal intervals along predetermined opposing sides (left and right sides in FIG. 3) of the flange 3. As shown in FIG. 4, the pin-shaped terminal 4 has a knob-like shape at one end.
This knob-shaped portion is attached to the collar portion 3 in a press-fitted manner. A groove 32 is provided between the pin-shaped terminals 4 toward the center of the winding core 1, and as shown in FIG. 4, a pin-shaped terminal 4 is provided corresponding to the center hole of the winding core 1. A substantial groove 33 is provided to extend parallel to the sides, and protrusions 33 projecting downward on both side edges of the groove 33.
1.

On the other hand, on a predetermined opposing side of the flange 2 (the side corresponding to the side on which the pin-shaped terminal 4 of the flange 3 is provided), grooves 23 are formed at equal intervals toward the center of the winding core 1. is provided. Furthermore, a groove 24 is provided near both ends of the side having the groove 23 and between the grooves 23 so as to extend from the upper surface of the flange 2 to approximately the center and toward the center of the winding core 1. As shown in FIG. 4, the lower part of the groove 24 extends further toward the center of the core 1 than the upper part. Further, the flange portion 2 is provided with a groove portion 21 extending parallel to the above-mentioned opposite sides in correspondence with the center hole of the winding core 1, and protrusion portions 211 that protrude upward are provided on both side edges of the groove portion 21. It is being The above-mentioned groove part 2
A pin-shaped terminal 10 having a knob at one end and formed into an L-shape is press-fitted into the lower part of the collar 4 and fixed by press-fitting the end with the knob. A pin-shaped terminal 10 is attached to.

Next, an inductor using the coil bobbin having the above structure will be described with reference to FIGS. 3 and 4.

A winding 6 is provided on the winding core 1, and the winding 6 is provided with a plurality of so-called taps (not shown). Lead wires (not shown) from the taps on the input side pass through the groove 32, are tied to predetermined pin-shaped terminals 4, and are soldered. Lead wires from the taps on the output side pass through the groove 23 and are tied to a predetermined pin-shaped terminal 10. Further, an external lead wire (wire) 9 is wound around the pin-shaped terminal 10 around which the lead wire is wound, and the wire 9, the lead wire, and the pin-shaped terminal 10 are fixed by soldering.

Further, the central leg portion of the E-shaped core 7 is inserted into the center hole 11 of the winding core 7 from the side of the flange portion 3 . The ends of each leg of the E-shaped core 7 reach the bottom of the groove 21 of the collar 2, and the connecting portion connecting each leg at one end is fitted into a groove 33 provided in the collar 3. There is. An I-shaped core 8 is placed in the groove 21 of the collar 2 and coupled to the E-shaped core 7. Furthermore, tsuba part 3
The predetermined opposing side (the side without the pin-shaped terminal) has the overhang dimension of the corresponding opposing side of the flange 2,
Groove portion 3 for making the protruding dimensions of the collar portion 3 the same
4 (see Figure 3). and the fourth
As shown in the figure, an insulating tape 5 is attached to a part of the E-type core 8.
The inductor is completed.

[Effect of idea]

As explained above, by using the coil bobbin of the present invention, not only is it extremely easy to connect the winding wire to the external lead wire, but even when the external lead wire is pulled upward, the L-shaped pin-shaped terminal can be attached to the flange. Because it is a press-fitted structure, it has the advantage of increasing tensile strength.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of an inductor using a conventional coil bobbin, Fig. 2 is a partially cutaway surface view of an inductor using a conventional coil bobbin, and Fig. 3 is a partially cutaway view of an inductor using a conventional coil bobbin. FIG. 4 is a perspective view showing an inductor using a coil bobbin, and FIG. 4 is a partially cutaway view showing the inductor using a coil bobbin according to the present invention. 1... Winding core, 2, 3... Flange, 4, 10... Pin-shaped terminal, 5... Insulating tape, 6... Winding wire, 7...
...E-type core, 8...I-type core, 9...external lead wire.

Claims (1)

[Scope of utility model registration request] A coil bobbin having an insulating cylindrical winding core around which a winding wire is wound, and an insulating flange extending in the radial direction of the winding core at both ends of the cylindrical winding core,
A plurality of first grooves extending inward in the radial direction are formed in the flange along the edge of each flange, and a second groove extending in the axial direction of the winding core is formed in one of the flange. A plurality of grooves are formed, and a plurality of pin-shaped terminals are provided along the edges of each of the flanges and extend outward in parallel with the winding core, and are provided on one of the flanges. The pin-shaped terminal is formed into an L-shape, and one end of the pin-shaped terminal is attached in the second groove toward the center of the flange, and one end of the winding is attached to the second groove. The winding is connected to a pin-shaped terminal provided on the other side of the flange via the groove, and the other end of the winding is connected to the pin-shaped terminal provided on the other side of the flange via the first groove. A coil bobbin structure characterized in that the external lead wire is connected to a pin-shaped terminal provided on the other side of the flange.