JPS6135503A - Manufacture of fixed inductance - Google Patents

Abstract

PURPOSE:To use economical elements and easily and stably attach the terminal pin by relatively rotating the terminal pin having particular shape and groove of drum core and then engaging the bending part of pin with the groove. CONSTITUTION:A terminal pin 1 provides the bending portions 1a, 1a which are formed in such a manner that both ends of U-shaped wire material are bent almost at a right angle and the end faces thereof are provided, for example, opposed to each other, while a drum core 2 provided with the grooves 4, 4 which engage with the bending portions 1a, 1a at the end surfaces of the one collar 3. The bending portions 1a, 1a of terminal pin 1 are placed at the end surface of collar 3 of the drum core 2, the terminal 1 and the drum core 2 are relatively rotated around the axial center of drum core 2 and the terminal pin 1 is inserted into the grooves 4, 4. The bonding agent 5 is supplied to the grooves 4, 4 in order to fix the bending portions 1a, 1a at the grooves 4, 4 and thereafter the coupling portion of terminal pin 1 is cut away.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a method of manufacturing a fixed inductor.

[Technical background of the invention and its problems] In a conventional fixed inductor, the terminal pin is inserted into the hole 32.3 provided in one of the flanges 31 of the drum core 30 as shown in FIG.
A pin 33.33 is inserted into 2 and fixed with an adhesive, and then the pin 33.33 is shaped into a predetermined shape. After the adhesive hardens, the terminal pins are shaped, so the distance between the pins is not accurate, and the terminal pins are rotated in the direction of the arrow, causing problems with the adhesive strength, causing them to wobble and become loose when handled. On the other hand, stress is placed on the core, causing chipping and cracking of the core.

Further, as shown in FIG. 9, one flange 3 of the drum core 35 is
An auxiliary collar 37 for holding the terminal pin is provided on the outside of the collar 36.
There is a device in which the terminal pins 38, 38 are fixed to the narrow diameter portion between the drum core 35 and the auxiliary collar 37 with an adhesive 39 at right angles to the axial direction of the drum core 35, and the terminal pins 38, 38 are shaped. In this case as well, the mounting strength of the terminal pins 38.38 is stronger than the one in Figure 8, but the distance between the terminal pins changes due to the shaping after fixation, and the rotational force in the direction of the arrow is applied. However, there were problems that affected the adhesive strength.

As a method to solve these problems, JP-A-58-132
No. 914 is provided.

In this method, the tsuba 36 and the auxiliary tsuba 3 are
7, both ends of the U-shaped wire rod are bent at approximately right angles, and the tips thereof are in approximately the same horizontal plane and face each other, and the opposing portions form a diamond-shaped frame. After the terminal pin 4o bent in a U-shape is elastically held and fixed with adhesive, the connecting portion of the terminal pin 40 is cut off. According to this method, it is easy to automate the manufacturing of fixed inductors, and the above-mentioned problems can be solved, but the disadvantage is that the shape of the terminal pin 40 is complicated or that a protruding flange must be provided separately. was there.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to easily and stably attach terminal pins while using components that are easy to configure and inexpensive in unit cost. The present invention aims to provide a method for manufacturing a fixed inductor that can be easily assembled automatically and easily.

[Summary of the Invention] The outline of the method for manufacturing a fixed inductor according to the present invention for achieving the above object is as follows: A drum core having a groove portion that fits into the bent portion on the end surface is used, the bent portion of the terminal pin is set on the end surface of the flange portion of the drum core, and the terminal pin and the drum core are rotated relatively around the axis of the drum core. The bent portion is then locked in the groove, the bent portion and the groove are fixed with adhesive, and the connecting portion of the terminal pin is cut off.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1(A) to FIG. 1(D) are schematic perspective views showing steps related to the present manufacturing method. First, an example of the terminal pin 1 and drum core 2 used in this method will be explained. As shown in FIG. 1(A), the terminal pin 1 includes bent portions 1a, 1a-, which are formed by bending both ends of a U-shaped wire at a substantially right angle so that the end surfaces thereof face each other, for example. There is. Further, the drum core 2 is provided with a groove 4.4 on the end surface of one of the flanges 3, which engages with the bent portions 1a and 'la. When manufacturing a fixed inductor using the above terminal pin 1 and drum core 2, first, the bent portion 1a of the terminal pin 1,
1a is placed on the end surface of the flange 3 of the drum core 2. At this time, depending on the arrangement relationship between the terminal pin 1 and the drum core 2, the bent portions 1a, la are not necessarily set in the direction in which they should be inserted into the grooves 4, 4. Therefore, in the present invention, the terminal pin 1 and the drum core 2 are rotated relative to each other around the axis of the drum core 2, so that the terminal pin 1 is set in the direction in which it should be inserted into the grooves 4, 4. (See Figures 1 (B) and (C)). In this case, even if either the terminal pin 1 or the drum core 2 is rotated, the maximum number of rotations required for the bent portions ia, ia to be inserted into the groove portions 4.4 is 1/2 rotation. In order to ensure that the bent portions 1a, 1a are inserted into the grooves 4, 4 when both directions match, in addition to using one song of the two, a biasing member or the like is used to press the terminal pin 1. may be pressed against the end surface of the flange portion of the drum core 2.

Regarding the fall of the terminal pin 1 in the direction of the arrow shown in FIG. It is preferable to guide the terminal pin 1 perpendicularly to the end surface of the flange 3.Next, the groove 4,
4 by pouring adhesive 5 into the bent portions ia and 1a to groove portions 4 and 4.
At step 4, it is fixed with adhesive (see FIG. 1(D)). Then, by cutting off the connecting portion of the terminal pin 1, a fixed inductor is obtained.

According to the above-described manufacturing method, since the shapes of the component parts are not complicated, the unit price of the parts can be reduced, which can greatly contribute to reducing manufacturing costs. Moreover, since each process operation of this manufacturing method is simple, it can be easily adapted to automatic mechanization.

Hereinafter, a device for automatically assembling a fixed inductor using this method and its operation will be explained.

FIG. 2 is a schematic perspective view of the fixed inductor assembly apparatus, and FIG. 3 is a schematic perspective view illustrating the assembly operation. In the figure, the terminal pin insertion guide member 10 and the terminal pin pressing member 11 are fixed at predetermined positions, and the drum core 2
The movable book 20 that loads the terminal pin insertion guide member 10. It passes below the terminal pin holding member 11 and moves along the six directions shown by the arrows. This moving block 20 is provided with a plurality of substantially semi-cylindrical notches 21 having a diameter slightly larger than the diameter of the flange 3 of the drum core 2 at predetermined intervals, and the drum core 2 is placed in the notches 21 and moved. It is supposed to be done. Moreover, the notch 21 is provided at an angle θ with respect to the vertical direction.
It is inclined with. Note that the tilt angle θ may be obtained by tilting the moving block 20 itself.

On this inclined surface 22 and above each of the notches 21, a pair of guide parts 23.23 are provided, which are arranged at an interval slightly wider than the width of the terminal pin 1. A transparent plate 24 is fixed on the side surface of 23. The distance between the inclined surface 22 and the transparent plate 24 is slightly larger than the wire diameter of the terminal pingo.

A hole 26 is bored at the lower end of the notch 21, and a biasing member 25 for biasing in the direction B in the drawing is disposed in this hole.

The biasing member 25 biases the bottom surface of the drum core 2 in the direction of arrow B only when the drum core 2 disposed on the moving block 20 passes below the terminal pin pressing member 11. Further, a drum core rotation driving member 27 is arranged at a position facing the inclined surface 22 and facing the lower end side flange 3 of the drum core 2 arranged on the moving block 20. This drum core rotational drive member 27 is always biased in the direction C in the figure, and moves linearly in the order of arrow E, arrow F, and arrow G.

The manufacturing procedure of a fixed inductor in such a position will be explained. The drum core 2 is placed in advance in the notch 21 of the moving block 20, and the moving block 20 is moved in the six directions shown in the figure. First, when the drum core 2 is set below the terminal pin insertion guide member 10, the terminal pin 1 is dropped from the terminal pin insertion guide member 10 by, for example, air (see FIG. 3). The terminal pin 1 is connected to the guide portion 23
23, is guided by the inclined surface 22 and the transparent plate 24, and is brought into contact with the end surface of one of the flanges 3 of the drum core 2.

At this time, abnormal settings of the terminal pins can be detected through the transparent plate 24. In addition, in this process, the bent portion 1a of the terminal pin 1 is
, 1a are not necessarily inserted into the grooves 4, 4 of the collar 3. This is because the directions of the grooves 4.degree. 4 are irregular because it is a complicated process to make the insertion direction of the drum core 2 constant. Next, when the drum core 2 is moved one step and comes below the terminal pin pressing member 11, the drum core 2 is urged by the urging member 25 in the direction of arrow C in the second figure. At this time, since the upward movement of the connecting portion of the drum core 2 is restricted by the terminal pin pressing member 11, the bent portions 1a, 1a of the terminal pin 1 come into contact with the end surface of the collar portion 3 with a predetermined pressing force. Become. Note that the biasing member 25 and the terminal pin insertion guide member 10 are not necessarily required, and the terminal pin 1 and drum core 2 may be brought into contact with each other by their own weight. On the other hand, at this time, the drum core rotation drive member 27 is driven, and as it moves in the direction of the arrow shown in the figure, it comes into contact with the flange 3 on the lower end side of the drum core 2, and as it moves in the direction of the arrow E in the figure, it rotates the drum core 2 and rotates the drum core 2 as shown in the direction of the arrow F.
, and is returned to the initial position by movement in the G direction. At this time, since the terminal pin 1 is prevented from rotating by the inclined surface 22, the guide portions 23.23, and the transparent plate 24, the flange portion 3 at the upper end of the drum core 2 slips on the bent portions 1a, la of the terminal pin 1. The grooves 4, 4 are rotated, and the directions of the grooves 4, 4 and the bent portions 1a, 1a are finally aligned. When both directions match, the biasing force of the biasing member 25 causes the bent portions 1a, 1a to be inserted into the groove portion 4.4. Note that even if the drum core rotation drive member 27 is driven continuously after this, the drum core rotation drive member 27 is biased in the direction of the arrow C shown in FIG. The drum core 2 will not be rotated due to slippage. In this way, the bent portions 1a, 1a of the terminal pin 1 can be easily inserted into the groove portion 4.4 of the collar portion 3. After the above steps are completed, a fixed inductor can be easily manufactured by adhering and fixing with adhesive 5 and cutting and removing the connecting portion of terminal pin 1. Note that since the terminal pin 1 is held between the inclined surface 22 and the transparent plate 25, it does not fall down as shown in the arrow direction in FIG. 1(C).

Note that the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention. The shapes of the terminal pin 1 and the drum core 2 shown in the above embodiments are merely examples, and the terminal pins 1 and drum core 2 can be applied to various shapes in which assembly is to be performed by inserting the bent portions 1a, 1a into the groove portions 4.4. The bent portions 1a, 1a of the terminal pin 1 are not limited to being bent such that the end surfaces thereof face each other, but may be bent in different directions. For example, by bending in different directions along the same circumference as shown in FIG. 4, falling in the direction of the arrow shown in FIG. 1(C) can be prevented. Further, as shown in FIG. 5, the bent portions 1a, 1a may be bent outward. In either case, the component can be made less complicated in shape than conventional terminal pins and can be made cheaper. Furthermore, Figure 6 (
A).

As shown in (B), the soldering can be done entirely in the vicinity of the bent portions 1a, 1a of the terminal pin 1, except for the curved portions 1b, 1b for convenience. Also, drum core 2 (7) tM section 4.
4 can also be made into various shapes depending on the shape of the bent portions 1a, 1a.Furthermore, as shown in FIG. The pin 1 may be prevented from being removed.

[Effects of the Invention] As detailed above, according to the present invention, a fixed inductor can be easily assembled using inexpensive component parts that are not complicated in shape, and is easily adaptable to automatic mechanization. A manufacturing method can be provided.

[Brief explanation of the drawing]

1(A) to 1(D) are schematic perspective views showing the manufacturing process of a fixed inductor according to the present invention, and FIG. 2 is a schematic perspective view of an apparatus for automatically assembling a fixed inductor based on the present invention. 3 are schematic perspective views explaining the manufacturing operation of the apparatus shown in FIG. 2, and FIGS. 4, 5, and 6 (
A) and (B) are schematic perspective views showing modified examples of the terminal pin, FIG. 7 is a schematic perspective view showing modified examples of the drum core flange, and FIGS. 8 to 10 are schematic perspective views showing modified examples of the conventional fixed inductor. It is a schematic perspective view explaining a manufacturing method. DESCRIPTION OF SYMBOLS 1... Terminal pin, 1a... Bent part, 2... Drum core, 3... Flange part, 4... Groove part, 5... Adhesive. Figure 5 1a 5P16 Figure (A) (B) Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] Using a terminal pin having a bent part where both ends of a U-shaped wire are bent at a substantially right angle, and a drum core having a groove part on the end face of one of the flanges that fits into the bent part, the bent part of the terminal pin is connected to the drum core. The terminal pin and the drum core are set on the end surface of the flange of the drum core, and the bent part is locked in the groove by rotating the terminal pin and the drum core relatively around the axis of the drum core, and the bent part and the groove are fixed with adhesive. A method of manufacturing a fixed inductor, the method comprising cutting out a connecting portion of the inductor.