JP2002313634A - Inductor and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the erroneous indication of the polarity of an inductor. SOLUTION: A polarity indicating mark 8 is put on the upper surface of a drum core 1 and a recess 5 is formed on the periphery of a lower flange 4. A rib 13 which corresponds to the recess 5 of the core 1 and a recess 14 which avoids the interference between a winding starting terminal 9 and the chuck 11 of a winding machine are formed on the inner peripheral surface of the chuck 11. The drum core 1 is fixed by means of the chuck 11 by aligning the rib 13 of the chuck 11 with the recess 5 of the core 1. The leg section of the winding starting terminal 9 is inserted into the slit formed of the angular recess 6 of the lower flange 4 and the angular recess 14 of the chuck 11 with the mark 8 as a guide, and a coil is wound around the core 1. Since the terminal 9 is not able to be fitted to the opposite side of the mark 8 even when it is tried, the erroneous indication of the polarity of the inductor is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inductor and a method for manufacturing an inductor, and more particularly to an inductor and a method for manufacturing an inductor which prevent incorrect polarity indication of the inductor.

[0002]

An inductor in which a coil is wound around a drum core has a different leakage flux depending on the polarity when connected to a circuit. Therefore, when it is necessary to suppress the influence of the leakage flux, the inductor is placed on the top surface of the inductor. The polarity of the inductor is managed using an inductor provided with a polarity display mark indicating the position of the winding start terminal.

[0003] When a polarity indicating inductor is manufactured by a production system using an automatic machine, marking is automatically performed following the winding process, so that a defective product having an incorrect polarity indication is not produced. In the case of production, a drum core pre-marked with the polarity indication mark is attached to the chuck of the winding machine and the coil is wound. As a result, there is a possibility that an inductor with an incorrect polarity indication having a polarity indication mark on the end-of-winding terminal side may be manufactured.

[0004] Therefore, the polarity of a manually manufactured inductor must be confirmed in a characteristic measurement step after manufacture, and there is a problem that the inspection is troublesome.
Therefore, there is a technical problem to be solved in order to prevent the polarity display error and eliminate the need for the polarity test, and to improve the productivity of the polarity display inductor, and the present invention solves the above problems. Aim.

[0005]

SUMMARY OF THE INVENTION The present invention proposes to achieve the above-mentioned object, and is an inductor having a polarity indication mark indicating the position of a winding start terminal. The drum core can be mounted on the chuck by marking and forming a recess on the outer periphery of the drum core flange and aligning the recess with the rib formed on the inner peripheral surface of the chuck of the winding machine, and the polarity display mark of the mounted drum core and An object of the present invention is to provide an inductor in which a rotation position of a winding start terminal mounting portion is positioned to prevent the winding start terminal from being mounted at a position other than the polarity display mark position.

A method of manufacturing an inductor having a polarity indication mark indicating the position of a winding start terminal, wherein the polarity indication mark is marked on a drum core and a recess is formed on an outer periphery of a flange of the drum core to provide a winding machine. Form a rib corresponding to the recess of the drum core on the inner peripheral surface of the chuck and a recess that avoids interference with the winding start terminal attached to the polarity display mark position of the drum core, and align the recess of the drum core with the chuck rib. By mounting the drum core on the chuck, the rotation position of the polarity display mark and the winding start terminal mounting portion is positioned, and the winding start terminal can be mounted at the position of the polarity display mark of the drum core, and the winding starts at a position other than the position of the polarity display mark. Provided is a method of manufacturing an inductor in which terminals are prevented from being mounted.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a drum core 1 in which flanges 3 and 4 are provided at the upper and lower ends of an upright hub 2, and an outer peripheral surface of a lower flange 4 having a diameter larger than that of the upper flange 3 is fixed to a chuck described later. A positioning semicircular recess 5 for mounting at a rotation angle and two rectangular recesses 6 and 7 for positioning a metal plate terminal are formed.

The two rectangular recesses 6 and 7 are located at 180 ° rotationally symmetric positions, and a semicircular recess 5 is disposed at a position 90 ° clockwise from the right rectangular recess 6 in the figure. On the upper surface of the upper flange 3, a polarity indication mark 8 is provided at the same position as the rectangular recess 6 on which the winding start side terminal 9 is mounted.

FIG. 2 shows a chucking device of a winding machine. The chucking device is constituted by two members, a chuck 11 shown in (a) and (b) and a chuck holder 12 shown in (c) and (d). I have. The chuck 11 is divided into four parts, a rib 13 corresponding to the semicircular recess 5 of the drum core 1 on the inner peripheral surface, and a winding start terminal 9 hanging on the outer peripheral surface of the lower flange of the drum core.
A rectangular recess 14 is formed to avoid interference with the recess.

When winding a coil around the drum core 1, as shown in FIG.
The lower flange 4 of the drum core 1 is inserted into the chuck 11 by aligning the semicircular recess 5 of the chuck 11 and the chuck 11 is pushed into the chuck holder 12 (or the chuck holder 12 is pushed into the chuck 11). Is the lower flange 4
And the drum core 1 is fixed.

Then, using the polarity display mark 8 as a mark,
Square recess 6 and chuck 11 for terminal to start winding of lower flange 4
When the leg of the winding start terminal 9 is inserted into a slit formed so as to match the rectangular recess 14, the winding start terminal 9 is attached to the position of the polarity display mark 8.

If a terminal is mistakenly mounted on the end-of-winding terminal position of the drum core 1 opposite to the polarity display mark 8 (the position of the square recess 7), the chuck 11 is attached to the square recess 7 Since no recess is provided at the same position as above, no terminal can be inserted, and the occurrence of an inductor with an incorrect polarity indication can be prevented.

Then, after the winding start terminal is mounted in accordance with the polarity display mark position of the drum core, as shown in FIGS. 3 and 4, the end of the ribbon wire W is attached to the winding start terminal 9, and the chucking device is mounted. When rotated clockwise in FIG. 4, the ribbon wire W is wound counterclockwise around the hub 2, and after rotating a predetermined number of turns, the drum core 1 is removed from the chuck 11, and the corner opposite to the polarity display mark 8 is turned. Attach the end-of-winding terminal at the position of the mold recess 7 to complete the inductor.

The rib 13 and the semicircular recess 5 may be arranged as a mark indicating the winding direction. In the above example, the rib 13 and the semicircular recess at a position 90 degrees clockwise from the polarity indication mark 8 are shown. According to 5, it can be determined that the chucking device and the drum core 1 rotate clockwise and the coil is wound left-handed. Although not shown, the semicircular recess 5 of the drum core 1 and the ribs of the chuck are located at positions rotated by 180 degrees from the positions shown in FIGS. 1 to 4, and are located 90 degrees counterclockwise from the polarity display mark 8. In this case, it is possible to determine that the chucking device and the drum core 1 are rotated counterclockwise and the coil is wound clockwise, thereby preventing the ribbon core W from being attached to the hub 2 of the drum core 1 in the wrong direction. it can.

It should be noted that the present invention is not limited to the above-described embodiment, and various modifications are possible within the technical scope of the present invention, and it goes without saying that the present invention extends to those modifications. is there.

[0016]

As described above, in the inductor manufacturing system of the present invention, it is possible to ensure that the polarity display mark of the drum core and the position of the winding start terminal at the time of winding work match without relying on the operator. As a result, it is not necessary to check the polarity in the measurement process, which can contribute to an improvement in productivity.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, in which (a) is a plan view of a drum core, and (b) is a side view of the drum core.

2 (a) is a plan view of a chuck, FIG. 2 (b) is a side view of the chuck, FIG. 2 (c) is a plan view of a chuck holder, and FIG. 2 (d) is a side view of the chuck holder. FIG.

FIG. 3 is a diagram illustrating a state in which a drum core is mounted on a chuck.

FIG. 4 is a plan sectional view of a drum core.

[Explanation of symbols]

 1 Drum core 2 Hub 3 Upper flange 4 Lower flange 5 Semicircular recess 6 Square recess 7 Square recess 8 Polarity indication mark 9 Winding start terminal 11 Chuck 12 Chuck holder 13 Rib 14 Square recess

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tadashi Nakahara 1049 Oda, Tateiwa-shi, Iizuka-shi, Fukuoka F-term in Kyushu Mitsumi Corporation (reference) 5E062 EE02 5E070 AA01 CC01

Claims (2)

[Claims] 1. An inductor having a polarity indication mark indicating the position of a winding start terminal, wherein the polarity indication mark is marked on a drum core, and a recess is formed on an outer periphery of a flange of the drum core. The drum core can be mounted on the chuck by matching the ribs formed on the inner peripheral surface of the drum core, and the polarity display mark of the mounted drum core and the rotation position of the winding start terminal mounting portion are positioned at positions other than the polarity display mark position. An inductor that prevents the winding start terminal from being mounted. 2. A method of manufacturing an inductor, comprising a polarity indication mark indicating a position of a winding start terminal, comprising marking a polarity indication mark on a drum core and forming a recess on an outer periphery of a flange of the drum core. Form a rib corresponding to the recess of the drum core on the inner peripheral surface of the chuck and a recess that avoids interference with the winding start terminal attached to the polarity display mark position of the drum core, and align the recess of the drum core with the chuck rib. By mounting the drum core on the chuck, the rotation position of the polarity display mark and the winding start terminal mounting portion is positioned, and the winding start terminal can be mounted at the polarity display mark position of the drum core, and the winding start at a position other than the polarity display mark position A method for manufacturing an inductor in which terminals are prevented from being mounted.