JPS61240837A - Preparation of copper foil coil assembly - Google Patents

Abstract

PURPOSE:To obtain the coil assembly of coils and a coil supporter integrated with each other, by cutting off the continuous coil supporter and the continuous coil units in a stationary state and in specified thickness. CONSTITUTION:A coil supporter 60 has a plurality of radially arranged arms 60a, and between the respective arms 60a, coil units 54 extending continuously in the axial direction before being cut off are fitted and are integrally formed with thermosetting resin or the like of epoxy or the like. The coil units 54 are fixed on the coil supporter 60, and in this state, they are cut off in thickness according to specified current capacity. A copper foil coil assembly 61 obtained in this manner is of coils and a coil supporter integrated with each other, and so when provided for a printed board 14, the coil assembly can be treated as an integral body.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The industrial field of application of the present invention is a field related to a method of manufacturing a copper foil coil assembly used in flat motors and the like.

[Conventional technology]

FIG. 6 shows an exploded perspective view of the flat motor. In FIG.
A printed circuit board 14 forming a part of 2 is fitted and fixed.

Coils 16 as shown in FIG. 4 are mounted on one side of the printed circuit board 14 in a radially balanced manner.

For example, on the other side of the printed circuit board 14.

Conductive pattern 18 constituting a commutator as shown in FIG.
are formed in the same number as the coils 16.

Two arms 19 extend from the conductive pattern 18 in different directions, and a through hole 20 is provided at the tip of each arm 19.
is formed.

These through holes 20 are used to mechanically and electrically fix and connect a coil 16 having a structure as described below.

At the inner and outer ends of the coil 16, as shown in FIG.
8 is provided.

On the other hand, the two rotating shafts 10 are connected to the bearings 34 of the housings 30 and 32.
and 36 are rotatably supported.

A stator 38 made of a permanent magnet is fixed in one housing 30 in close proximity to the coil 16.

Further, on the other housing 32 side, a semi-arculated brush 40a that slides in contact with the conductive pattern 18 serving as a commutator is provided.
, 40b is fixed to the brush mounting plate 40 made of an insulating material.

Both ends of the brushes 40a and 40b are fixed to the brush mounting plate 40 with rivets or the like.

A terminal plate (not shown) to which a lead wire is connected is fastened to the outer surface of the brush mounting plate 40.

Note that an opening 44 is provided in the housing 32 to prevent the terminal plate and the head of the rivet from coming into contact with each other.

The housings 30 and 32 are integrated with the rotor 12 in between, with the stator 68° and the brush mounting plate 40 fixed, thereby completing a flat motor.

Since a flat motor having such a structure can be made thin and compact as a whole, it is used in many electronic devices that require a small motor.

Incidentally, the coil 16 used in such a flat motor is manufactured as shown in FIGS. 6 and 7.

That is, as shown in FIG. 6, the thickness is 18 μm to 10 μm.
A pipe-shaped bottle 51 is soldered or the like at the starting end of a copper foil 50 having a predetermined width of 0 μm and coated with an insulating material that also serves as an adhesive such as polyurethane or epoxy resin on one or both sides. Fix it properly.

Then, this starting end is fixed to a core material 52 made of an insulating material such as polyurethane using an adhesive or the like, and the core material 52 is wound around the core material 52 according to the desired number of windings.

When the winding is completed, a pin 56 is fixed to the end of the copper foil 50, and this is fixed to the outermost periphery of the coil, thereby obtaining a coil body 54.

The coil body 54 thus obtained is cut by a cutter 55 to a width matching the required current capacity, as shown in FIG. 7, to obtain the coil 16.

The coil 16 thus obtained has pins 26, 28, as shown in FIG. 4, in which continuous tubular pins 51, 53 are cut.

The obtained coil 16 connects pins 26 and 28 to the printed circuit board 1.
Pin 26.28 aligned with through hole 20 of 4
The rotor 12 is attached to the printed circuit board 14 by fitting itself or by fitting another conductive pin (not shown) to the printed circuit board 14, thereby completing the rotor 12.

[Problem that the invention seeks to solve]

In the flat motor having the above-described structure, the coils 16 are positioned one by one and attached to the printed circuit board 14.
The problem is that the installation work is extremely complicated and increases assembly costs, leading to high costs.

[Means for solving problems]

In the present invention, in order to solve the above-mentioned problems,
A coil body wrapped with copper foil before cutting is fixed to a continuously formed coil supporter with a radial cross section via adhesive, and the coil body and coil supporter are cut into a predetermined width as one body. A method was adopted in which a coil assembly was obtained and the coil assembly was fixed to a printed circuit board.

[For production]

By adopting this method, the coil assembly as a whole can be mounted on the printed circuit board, which is easier to install than when each coil is mounted one by one, and is suitable for mass production, resulting in significant cost reductions. .

〔Example〕

The details of the method of the present invention will be explained below based on examples shown in nine drawings.

FIGS. 1 and 2 illustrate an embodiment of the present invention. In FIG. 1, the reference numeral 60 is a coil supporter formed of an insulating material such as synthetic resin into a ridge shape extending continuously in the axial direction. has been done.

This coil supporter 60 has a plurality of cylindrical arms 60a arranged radially, and between each arm 60a and 6Oa, there is a section between the arms 60a and 6Oa that extends continuously in the axial direction as shown in FIG. The coil body 54 is fitted and integrally attached using a thermosetting resin such as epoxy.

Then, as shown in FIG. 1, with the coil body 54 fixed to the coil supporter 60, the coil body 54 and the coil supporter 60 are cut integrally to a width corresponding to a predetermined current capacity.

The copper foil coil assembly 61 obtained in this way is
As shown in FIGS. 1 and 2, since the coil and the coil supporter are integrated, they can be treated as one body when attached to the printed circuit board 14, and a plurality of coils can be attached at the same time.

The coil supporter 60 is attached to the printed circuit board 14 via adhesive.
The coil assembly can be fixed extremely firmly by attaching it to the coil assembly.

Of course, the pins 26 and 28 of each coil 16 are fitted into the through holes 20 of the printed circuit board 14 to effect electrical connection.

As mentioned above, in the present invention, a coil assembly in which a coil and a coil supporter are integrated can be mounted on a printed circuit board, so it is possible to mount a plurality of coils on a printed circuit board one by one as in the conventional method. It is suitable for mass production because it can be assembled automatically, eliminating the hassle of positioning and mounting it.

Note that although the above-described embodiment is illustrated as having six coils, the number of coils is not limited.

Of course, any number of parts may be used, and the shape of the coil supporter may be changed depending on the number of coils.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a method is adopted in which a continuous coil body is fixed to a continuous coil supporter and then cut to a predetermined thickness, so that the coil and the coil supporter are integrated. It is possible to obtain a coil assembly that can be easily assembled, and when installing the coils on a printed circuit board, multiple coils can be treated as one, easy to install, suitable for automation, excellent in mass production, and a significant cost reduction can be achieved. Moreover, a loader with good balance performance can be easily obtained.

[Brief explanation of the drawing]

1 and 2 illustrate one embodiment of the present invention, and FIG. 1 is a perspective view illustrating a manufacturing method. Figure 2 is a plan view of the coil assembly mounted on the printed circuit board, Figure 5 is an exploded perspective view of a flat motor with a conventional structure, Figure 4 is a perspective view of a copper foil coil, and Figure 5 is the back of the printed circuit board. FIG. 6 is a perspective view illustrating a method for manufacturing a copper foil coil, and FIG. 7 is a perspective view illustrating a conventional coil cutting method. 10... Rotating shaft, 12... Rotor, 14...
...Printed circuit board, 16...Copper foil coil, 18...
...Conductive pattern, 20...Through hole. 26.28...Pin, 40a, 40b...Brush, 50...Copper foil, 54...Coil body. 60... Coil supporter, 60a... Arm. 61...Copper foil coil assembly.

Claims (1)

[Claims] A coil supporter made of an insulating material has a plurality of radially arranged arms at predetermined angular intervals along the circumference, and insulates copper foil between each arm of a coil supporter that extends continuously in the axial direction. The coil body, which is wound through layers and continuously extended in the axial direction, is fixed with an adhesive, and then the coil is cut together with a coil supporter to a width corresponding to the current capacity to obtain a coil assembly. A method for manufacturing a copper foil coil assembly.