JPH06290965A - Inductor - Google Patents

Abstract

PURPOSE:To provide a core, which has excellent operability and superior yield and is not broken, and a holder for fixing the core. CONSTITUTION:The core of an inductor such as a thin-type transformer-choke coil and a holder for fixing the core are used, the inclined plane section 14 of the end section of the core, a core groove 15 and an edge section 16 lower than the top face of the core are formed at an end section 17 in a reverse surface to the mating surface 22 of the E-shaped core 13, a support section having a hole 23 at a center is formed to the holder, and an arm section groove 20 and a support section groove 21 are shaped to the support section. Four arm sections 5, 6, 7, 8 are formed from the four corners of the support section, guides 1 and pawl sections 9 are shaped to the arm sections 5, 6, 7, 8, and the inclined plane section 14, the core groove section 15 and the edge section 16 of the core are fastened by the holder by holding the inclined plane section 14, the core groove section 15 and the edge section 16 by the guides 1 and the pawl sections 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inductor such as a transformer / choke coil, and more particularly to a core of a light / thin / short / small compact transformer / choke coil and a holder for fixing the core (hereinafter referred to as a holder).

[0002]

2. Description of the Related Art In a conventional thin transformer / choke coil, as shown in FIG. 6, a thin transformer / choke coil base 25 is made of a resin electric insulating material, and although not shown in FIG. 6, it holds a copper plate coil. Outer collar and split E
This is a structure in which an inner peripheral flange is attached around a central hole in which the shaped magnetic core 24 is incorporated and terminals 26 are planted at both ends of the base of the flat plate. A thin transformer choke coil has been produced by laminating a copper plate coil or a spiral coil on the upper surface of the base 25, and inserting a terminal hole of the copper plate coil into a coil terminal of the terminal, which is not shown, and soldering and connecting. It was FIG. 6 shows a state in which the insulating tape 28 is wound around the core 24 several times to fix two E-shaped cores. Figure 7 shows core 2
Holder 27 of the conventional type so that the corners of both ends of 4 are scraped off so that the holder 27 does not protrude from the upper surface of the core.
Shows the state where the core 24 is fixed.

[0003]

Conventionally, the core is wound and fixed with a tape. However, since the thickness of the tape protrudes from the upper surface of the core and the outside dimension becomes large, there is a problem in thinning. Was becoming. Further, since the tape used as the core fixing tape uses polyimide as a material, there has been a problem that the cost is high. In addition, although the holder was also used for fixing, in order to hold and fix the core in a shape similar to that of the core, the claw portion of the holder caused the core to be chipped and the core to be chipped. There were problems such as poor work efficiency of tape fixing and core breakage in the holder due to the conventional shape. In the conventional tape fixing, the work efficiency is poor, and the height of the product becomes large due to the tape thickness in the outer dimension, which is a problem for thinning. Further, in the conventional fixing by the holder, the core chipping occurs due to the claw portion of the holder, and the work efficiency and the yield are very poor.

[0004]

In order to solve the above problems, the present invention requires the core and the holder to have a special shape.

That is, according to the present invention, the E-shaped core (13) has a beveled portion (14) and a core groove (15) at both end portions (17) facing the joint (22) of the core (13). An edge portion (16) lower than the upper surface of the core (13) is provided, and the slope portion (14), the core groove (15) and the edge portion (1) of the core are provided.
6) An H-shaped core fixing holder for holding and
The H-shaped core fixing holder has arms (5, 6, 7, 8)
And a support portion (19) for the arm portion, and the support portion (19)
A hole (23) is provided in the central portion of the arm portion, and an arm groove (2) is formed at a connecting portion between the supporting portion (19) and the arm portions (5, 6, 7, 8).
0) and a support groove (21) are provided, and the arm portions (5, 6,
7, 8) include guides (1, 2, 3, 4) for suppressing the sloped portion (14) of the core (13) and claws (9, 10, for suppressing the core groove (15) of the core (13). 11 and 12), and the core (13) is sandwiched and fixed by the H-shaped core fixing holder.

[0006]

The shape of the core is such that groove-shaped protrusions, that is, the sloped portion, the core groove and the edge portion are provided at both ends, and the shape of the holder is that the holder is the groove-shaped protruding portion of the core and the core groove. It is to form into a shape that matches the edge part. In particular, the holder is provided with a slanted surface which is a groove-shaped projection of the core, a claw portion for holding and fixing the core groove portion and the edge portion, and the slanted surface portion which presses and fixes the core by the claw portion is fixed to the core. Provided to provide a guide for holding the core. The claws and guides of the holder may be of a separated type or integrally molded, but in order to fix and hold the core, four claws and guides are provided vertically and horizontally. Further, the claw portion and the guide support portion are provided with a U-shaped arm portion groove on the outside and a U-shaped support portion groove on the inside, so that the slope portion of the core, the core groove and the edge portion are softened. Obtain a core fixing holder that has a structure to hold down. By using the core and the holder, there is no need to use a tape, which is a conventional fixing method, and there is a problem of thinning due to the influence of tape thickness, which is a problem, and a problem due to a decrease in work efficiency. Solvable. In addition, the problem of chipping of the core, which has been caused by using the conventional holder, is solved, and the working efficiency can be improved.

[0007]

1 is a perspective view showing an embodiment of a holder for fixing a core according to the present invention. FIG. 2 is a perspective view showing another embodiment of the core fixing holder of the present invention. FIG. 3 is a perspective view showing a state before the holder is assembled to the end portion of the core of the present invention. FIG. 4 is a perspective view showing a state in which the core and the holder of the present invention are assembled. FIG. 5 is a perspective view showing a core of the present invention, and particularly showing a slope portion, a core groove and an edge portion of the core.

The method of fixing the core used in the conventional thin transformer / choke coil is the same as the method of fixing the core of a general power transformer, and the method of fixing with a tape and the core so as not to stick out from the core. It was a core fixing method using a holder having a shape similar to the core mounted on the corners of the.

The E-type core is made of a soft magnetic material, Mn-Z.
An n ferrite core was used. The middle leg of the E-shaped core is inserted into the center hole of the base for the thin transformer / choke coil base, and the side legs on both sides of the core are attached to the outer collars. It is fixed to a thin transformer / choke coil base by a holder to make a thin transformer / choke coil. As shown in FIG. 5, the core has slopes 14 and core grooves 15 on both ends of the core 13.
And the edge portion 16 is formed. Conventionally, the sloped portion 14 has no sloped portion in the past, and has a notch at an angle of 90 degrees immediately, and also forms a flat surface immediately to form a step of 90 degrees, and using the step, a U-shaped portion is formed. Although the core was fixed with the holder, the corner of the core is chipped by the holder as a measure for chamfering because the core is processed at a right angle. for that reason,
The inclined surface portion 14 was formed on the core, and the guides 1, 2, 3, 4 of the core fixing holder were applied to the inclined surface portion as shown in FIG. 4 to press the core. Further, the claw portions 9, 10, 11, 12 press the core groove 15 so that the edge portions 16 are not contacted with the arm portions 5, 6, 7, 8 of the holder. By using the holder described above, the chipping of the core can be prevented because it does not hit the corners of the core.

Guides 1, 2, 3, 4 of the core fixing holder are applied to the inclined surface portion 14 to prevent chipping, and the edge portion 16 is made lower than the upper surface of the core so that the holder does not protrude from the upper surface of the core. Since the force to weakly press the two-divided cores only with the holder guides 1, 2, 3, 4 is weak, a flat portion is formed at the bottom of the valley of the slope portion 14 to form the core groove 15, and the holder claws are formed. The parts 9, 10, 11, 12 (shown in FIG. 4) hold the core groove 15 in a biting manner. The claw portions 9, 10, 11, 12 of the holder hit the core groove 15 and strongly press the core groove 15, but the corners of the edge portion 16 are made flat so as not to be chipped. , 6, 7, 8 and the claw portions 9, 10, 11, 12 have barbs formed so as not to directly contact the edge portion 16. Therefore, in the holder of the present invention, the core is fixed by the slope portion 14 and the core groove 15 instead of pressing and fixing the core by the edge portion. Further, the holder presses the core with the claws and the guide, but the edge portion 16 is considerably lower than the upper surface of the core. Therefore, the holder does not protrude from the upper and lower surfaces of the core.

FIG. 1 is a perspective view showing an embodiment of a core fixing holder according to the present invention. The core fixing holder is substantially H-shaped, and the center portion of the holder has a hole 23 at the support portion 1 of the arm portion.
9 to make the upper left arm 5, the upper right arm 6, from the support portion 19,
The lower left arm portion 7 and the lower right arm portion 8 are formed. Arms 5, 6, 7,
8 includes an upper left guide 1, an upper right guide 2, a lower right guide 3 and a lower right guide 4, and the guides 1, 2, 3 and 4 hold the inclined surface portion 14 of the core so as to be bitten.

Similarly, an upper left claw portion 9, an upper right claw portion 10, a lower left claw portion 11, and a lower right claw portion 12 are formed on each of the arm portions 5, 6, 7, and 8 to form a claw. The parts 9, 10, 11, 12 press and hold the core groove 15.

At the base of the outer side where four arms of the support portion of the core fixing holder are erected at the same time, the U-shaped groove 2 in a U-shape is formed vertically and horizontally.
0 is provided, and a U-shaped support groove 21 is provided at the inner base where four arms of the support are connected. As a result, the spring property of the arm is formed, and the fulcrum that creates the spring is the arm groove 20 and the support groove 21, and by not forming a groove at the corner of this root, the spring property and holding force are further improved. Improves, but does not press the core softly, so the arm groove 20
The support groove 21 also serves to softly press the core to prevent the occurrence of defects such as chipping and cracks in the core.

The holes 23 serve to eliminate the distortion of the holder so that the support portion and the arm portion of the holder can be fitted tightly to the back portion of the end portion of the core.

FIG. 2 is a perspective view showing another embodiment of the core fixing holder of the present invention. The structure of the holder is almost the same as that of the holder of FIG. 1, but each guide 1, 2, 3, 4 of the holder and the claw portions 9, 10, 11, 12 form a twisted portion 18 which is twisted together. is doing. By doing so, as shown in FIG. 1, the strength of holding the guide and the core of the claw becomes stronger than the holder that cuts off the guides 1, 2, 3, 4 and the claws 9, 10, 11, 12. I have

FIG. 3 is a perspective view showing the core and the holder. The holder is the holder shown in FIG. 1, and the core 13 has a beveled surface 14 at the end 17, a core groove 15, and an edge 1.
6 is shown in detail, showing how the holder is attached to the core.

FIG. 4 shows a state in which a holder is incorporated in the core. Since the edge portion 16 of the core is low, the holder is lower than the upper and lower surfaces of the core. Further, it can be seen that the guides 1, 2, 3 and 4 push and hold the slope portion 14 at the end portion of the core. Also, the claw portions 9, 10, 11, 12
Holds the groove 13 of the core so as to firmly bite, and the support portion 19
It can be seen that the arms 5, 6, 7, 8 firmly press the mating surface of the end 17 of the core.

[0018]

According to the present invention, the workability problem and the external dimension problem caused by the tape thickness, which have been caused by the conventional method for fixing the core by the tape (the thickness of the tape comes out from the upper and lower surfaces of the core, it cannot be made thinner). Further, by solving the problems of cost due to the use of the tape and the problems such as core breakage caused by the conventional fixing of the holder by the similar shape, the holder of the present invention can be easily worked.

[Brief description of drawings]

FIG. 1 is a perspective view showing a core fixing holder of the present invention.

FIG. 2 is a perspective view showing another core fixing holder of the present invention.

FIG. 3 is a perspective view before the core is held by the core fixing holder according to the present invention.

FIG. 4 is a perspective view of the core of the present invention assembled with a core fixing holder.

FIG. 5 is a perspective view showing a core of the present invention.

FIG. 6 is a perspective view of a thin trans choke coil according to a conventional core fixing method using a tape.

FIG. 7 is a perspective view of a thin transformer choke coil incorporated by a conventional holder core fixing method.

[Explanation of symbols]

 1 (upper left) guide 2 (upper right) guide 3 (lower left) guide 4 (lower right) guide 5 (upper left) arm 6 (upper right) arm 7 (lower left) arm 8 (lower right) Arm part 9 (upper left) claw part 10 (upper right) claw part 11 (lower left) claw part 12 (lower right) claw part 13 core 14 beveled part 15 core groove 16 edge part 17 end part 18 twisted part 19 support part 20 arm groove 21 support groove 22 seam 23 hole 24 core 25 base 26 terminal 27 holder 28 tape

Claims (1)

[Claims] 1. The E-shaped core (13) has a slope (14), a core groove (15) and the core (13) at both ends (17) facing the joint (22) of the core (13). 13) An edge portion (16) lower than the upper surface is provided, and an inclined surface portion (1
4) A H-shaped core fixing holder for holding the core groove (15) and the edge portion (16), wherein the H-shaped core fixing holder is an arm portion (5, 6, 7, 8). And a support part (19) for the arm part, and a hole (23) is provided in the center part of the support part (19), and the support part (19) and the arm part (5,
6, 7 and 8) are provided with an arm groove (20) and a support groove (21), and the arm (5, 6, 7, 8) is provided with an inclined surface of the core (13). Guide (1,
2, 3, 4) and claws (9, 10, 11, 12) for suppressing the core groove (15) of the core (13) are provided, and the core (13) is the H-shaped core fixing holder. An inductor characterized by being sandwiched and fixed.