JPS6017846Y2 - Bobbin for coil winding - Google Patents

Description

[Detailed description of the invention] The present invention relates to the structure of a bobbin for winding coils used in motors, transformers, speakers, etc., and in particular, to facilitate terminal processing of the coil and attachment of the bobbin to a printed circuit board, etc. It was made so that it could be done.

FIG. 1 shows how a coil 1 used as a stator of a conventional flat type brushless DC motor is wound around a bobbin 2 by a winding machine.

The bobbin 2 is provided with flanges 3 and 4, and one flange 4 is provided with a leg portion 5 bent into a hook shape.

This bobbin 2 is fitted into a rotating shaft 6 of a winding machine.

First, the nozzle 7 provided on the winding machine is brought above the bobbin 2, and then the nozzle 7 is moved by rotating the rotating shaft 6.
The conducting wire 8 led out from the bobbin 2 is wound around the bobbin 2.

After winding a predetermined number of times, the nozzle 7 is moved to position 7'.

As shown in FIG. 2, the flange 4 is provided with a notch 9, and as the nozzle 7 moves, the end 1a of the wound coil 1 passes through the notch 9 and is brought to the leg 5. be done.

In this state, rotate the nozzle 7 in the direction of arrow a to
Wrap a around the leg 5 several times.

After winding is completed, the conducting wire 8 is cut and the bobbin 2 is removed from the rotating shaft 6.

The bobbin 2 on which the coil 1 has been wound and the terminals have been treated as described above is attached to the printed circuit board 10 as shown in FIG.

This printed circuit board 10 is provided with a hook-shaped notch 11 as shown in FIG.
The terminal 1 wrapped around the leg 5 is inserted.
A is brought into contact with the wiring pattern 12.

Next, solder 13 the terminal 1a and the wiring pattern 12.
By doing this, the bobbin 2 is fixed and the coil 1 is fixed.
The electrical connection between the wiring pattern 12 and the wiring pattern 12 is compromised.

However, since the legs 5 of the bobbin 2 having such a structure are formed in a hook shape, the printed circuit board 10 into which the legs 5 are inserted must also be provided with a hook-shaped notch 11 as shown in FIG. Must be.

Also, when inserting the leg portion 5 into this notch 11, the bobbin 2
It is difficult to install the bobbin 2, as the bobbin 2 must be inserted while being moved several times in the appropriate direction.

FIG. 5 shows another conventional example, in which the bobbin 2 is
This is a case where a rod-shaped leg portion 5 is used.

In this case, first, as in FIG. Rotate it so that it faces the leg part 5.

Next, the nozzle 7' is rotated in the direction indicated by the arrow to wrap the end 1a around the leg 5.

If the bobbin 2 shown in FIG. 5 is used, it is only necessary to provide a round hole in the printed circuit board 10 for inserting the leg portion 5, and the bobbin 2 can be easily attached.

However, the moving direction of the nozzle 7 is more complicated than in the case shown in FIG. 1, and a new problem arises in that the nozzle drive mechanism in the winding machine is complicated.

The present invention provides a bobbin that can be easily attached to a printed circuit board and has a simplified nozzle drive mechanism.Examples of the present invention will be described below with reference to the drawings.

FIG. 6 shows a bobbin 20 according to the present invention.

This bobbin 20 has a structure in which flanges 21 and 22 are provided, and the flange 22 is provided with leg portions 23 and notches 24.

As shown in the figure, the leg portion 23 is protruded substantially parallel to the axial direction of the coil to be wound, and then bent in a direction substantially perpendicular to the axial direction, and is bent substantially perpendicular to the axial direction and in the direction of the hobbin 22. It has a shape that is bent in the outer radial direction and further has a tip end portion 23a protruding in a direction substantially parallel to the above-mentioned axial direction.

FIG. 7 shows how the coil 1 is wound around the bobbin 20, and the nozzle 7 is moved in the same manner as in FIG. 1 to wind the end 1a around the tip 23a of the leg 23. be able to.

Moreover, it is only necessary to provide the printed circuit board 10 with a round hole for inserting the tip portion 23a.

FIG. 8 shows another embodiment of the leg portion 23.

In this embodiment, a guide groove 23b is provided in the tip portion 23a,
The terminal 1a is wound around this guide groove 23b.

FIG. 9 shows an embodiment in which a bobbin 20 attached to a printed circuit board 10 is incorporated into a flat brushless motor.

In the figure, 25 is a mounting frame, 26 is a bearing, 27 is a rotating shaft, 28 is a mounting boss, 29 is a yoke, 30 is a ring-shaped magnet, and 31 is a yoke.

The printed circuit board 10 has a bobbin 20 around which the coil 1 is wound.
Multiple units are installed.

This printed circuit board 10 is provided with an insertion hole 32, into which the leg portion 23 is inserted, and the terminal 1a is soldered 34 to a wiring pattern 33.

The yoke 29 and the magnet 30 constitute a rotor, and the yoke 31 and the coil 1 constitute a stator.

In the above configuration, when a current is sequentially passed through the plurality of coils 1, this current interlinks with the magnetic flux of the magnet 30, and rotational force is obtained.

FIG. 10 shows a coil molded body 35 formed by integrally molding four coils 1.

This molded body 35 is made by integrally molding synthetic resin together with the coil 1, and has a disk shape as shown in the figure, and has a shaft insertion hole 36 in the center and a plurality of legs 37 at the bottom. It is provided.

Further, four coils 1 are embedded in the insertion hole 36 and arranged at 90° intervals.

The upper and lower surfaces of each coil 1 are exposed, and the inner diameter hole 1b of each coil has no resin and is a through hole.

The terminal end 1a of each coil 1 is wound around the leg portion 37.

Such a molding body 35 can be attached to the printed circuit board 10 and incorporated into a motor as shown in FIG.

Although the leg portion 37 has the same shape as the leg portion 5 of the bobbin 2 shown in FIG. 1, the leg portion 37 may have the same shape as the leg portion 23 shown in FIG. 7 or 8.

In the present invention, a flange is provided, and a leg portion is provided on the side of the flange opposite to the coil winding side, and the leg portion protrudes in a direction substantially parallel to the axial direction of the coil to be wound. The coil winding bobbin has a shape that is bent in a direction substantially perpendicular to the axial direction and in the outer diameter direction of the flange, and further protrudes in a direction substantially parallel to the axial direction. .

Therefore, according to the present invention, it is possible to obtain a bobbin for a coil of this type that can be easily attached to a printed circuit board or the like, and can also be easily wound and terminal-treated.

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[Brief explanation of drawings]

Figure 1 is a side view of the main parts showing how the wire is wound on a conventional bobbin, Figure 2 is a perspective view of the main parts of the bobbin in Figure 1, and Figure 3 is the bobbin in Figure 1 attached to a printed circuit board. 4 is a perspective view of essential parts of the printed circuit board, FIG. 5 is a side view of another conventional example, and FIG. 6 is a side view of a bobbin showing an embodiment of the present invention. Fig. 7 is a perspective view of the main part of the bobbin shown in Fig. 6, Fig. 8 is a perspective view of the main part showing another embodiment of the leg portion of the bobbin, and Fig. 9 is a state in which the bobbin of the present invention is assembled into a flat brushless motor. FIG. 10 is a perspective view of a coil molded body that can be incorporated into the motor. In addition, in the symbols used in the drawings, 1... Coil, 1a... Terminal, 20...
・Bobbin, 1.22...Flange, 23...
···leg.

Claims (1)

[Scope of utility model registration request] A flange is provided, and a leg portion is provided on a surface of the flange opposite to the coil winding side, and the leg portion protrudes in a direction substantially parallel to the axial direction of the coil to be wound, and then A coil winding bobbin that is bent in a direction substantially perpendicular to the axial direction and in an outer diameter direction of the bobbin, and further bent in a direction substantially parallel to the axial direction.