JP3254226B2 - Spindle motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle motor.

[0002]

2. Description of the Related Art As shown in FIG. 6 , a conventional spindle motor connects a terminal b of a flexible circuit board a to an end e of a coil wire d of a stator c by a bracket body f.
The soldering is performed in the gap between the stator and the stator c.

[0003] Generally, the assembling order is such that a stator c is fixed to the outer periphery of a cylindrical portion j of a bracket i, while a flexible circuit board a is fixed to a bracket body f in advance, and then the bracket Body f and stator c
A soldering iron or the like is inserted into the gap between the coil wire d and the end e of the coil wire d is soldered h. Next, the hub k was assembled.

[0004]

In such a conventional structure, soldering (as is clear from FIG. 6 ) is performed .
There is a problem that the space for the work is small and the work is difficult.

In particular, if the size of the spindle motor is reduced,
The gap between the stator c and the bracket body f is extremely small, and the work of soldering h becomes extremely difficult. Further, at the time of soldering h, there is a problem that dust such as flux adheres to other parts and deteriorates quality.

Accordingly, it is an object of the present invention to provide a conventional spindle motor which solves such a problem.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a hub which is rotatably supported on a bracket via a pair of bearings, and a stator which is opposed to a rotor magnet mounted on the hub. In a spindle motor integrally fixed to a bracket and electrically connecting an end of a coil wire of a stator to a terminal portion of a flexible circuit board mounted on the bracket, an end of the coil wire is connected to the stator 4. Bracket with coil wire 6 wound around
Wrapped around the elastic member 14 of <br/> insulation interposed between the flexible circuit board 16 on the sheet 1, a portion is previously peeled insulating layer end 13 of the coil wire 6, the This is directly pressed into the terminal portion 11 of the flexible circuit board 16 to make contact conduction.

Further, a hub is rotatably supported on a bracket via a pair of bearings, and a stator is integrally fixed to the bracket so as to face a rotor magnet mounted on the hub, and a flexible circuit board mounted on the bracket. In the spindle motor, an end of the coil wire of the stator is electrically connected to the terminal portion of the stator, an auxiliary pole is formed to project from the teeth of the stator core, and the end of the coil wire is connected to the auxiliary pole. By winding, by the elastic force of the insulating elastic body disposed immediately above or directly below the terminal portion of the flexible circuit board, a portion of the end of the coil wire where the insulating layer has been peeled off in advance, The terminal is directly pressed against the terminal portion of the flexible circuit board to make contact with the terminal.

[0009]

According to the present invention, the end of the coil wire and the mating terminal can be easily and easily brought into direct contact with each other by the elastic force of the elastic body (without soldering).

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments.

FIG. 1 is a sectional view showing an embodiment of a spindle motor according to the present invention. 1 is a bracket, to organic and bracket body 3 of generally circular disk shape, the cylindrical portion 2 extending from the upper surface of the bracket body 3. Reference numeral 4 denotes a stator fixed to the outer periphery of the cylindrical portion 2, and a stator core 5
And a coil wire 6 wound around the stator core 5.

Reference numeral 7 denotes a hub on which a magnetic disk or the like is mounted, and an annular rotor magnet 8 is mounted on the inner peripheral surface thereof.

A shaft 9 is formed integrally with the hub 7 and extends vertically downward from the inner surface of the end wall of the hub 7.

Reference numerals 10 and 10 denote bearings.
A shaft 9 integral with the hub 7 is rotatably attached to the cylindrical portion 2 of the bracket 1 via the hubs 0 and 10. As shown in FIG. 1, the rotor magnet 8 is located outside the stator 4 so as to face the same, and the hub 7 (rotor magnet 8) is rotated in a predetermined direction with respect to the bracket 1 (stator 4).

[0015] 16 is a flexible circuit board, a flexible base film, a flexible cover film, and is made conductive portion Toka et structure of copper foil interposed sandwich-like between the two films.

As shown in FIGS. 1 and 2, the terminal portions 11 are cut out of the cover film at predetermined positions on the sticking portion 12 of the flexible circuit board 16 to expose the conductor portions.
An appropriate number is formed. And to the bracket body 3,
The flat ring-shaped sticking portion 12 of the flexible circuit board 16 is fixed in advance.

Reference numeral 14 denotes an insulating elastic body which is formed in a gate shape and can be attached to the coil wire 6.

Then, the ends 13 of the coil wires 6 are wound around the respective elastic members 14 and attached to the lower surface side of the coil wires 6, respectively.
The stator 4 is mounted on the bracket 1 by aligning the end portions 13 of the coil wires 6 wound around the elastic members 14 with the predetermined terminal portions 11. The portions 11 are brought into contact with each other by the elastic force of the elastic members 14. At this time, the end portion 13 of the coil wire 6 is previously made conductive by peeling off the insulating layer.

As described above, the electrical connection between the end portion 13 of the coil wire 6 and the terminal portion 11 of the flexible circuit board 16 is
It can be easily and easily performed without soldering. Accordingly, since soldering is not required, the assembling of the spindle motor can be automated and labor can be saved.

In the example shown in FIG.
Although 6, the conductive connection can be made on a circuit board such as an epoxy resin in the same manner as described above.

Next, FIGS. 3 and 4 show another embodiment.

Reference numeral 15 denotes an auxiliary pole of the stator core 5, which is formed between the teeth 17, 17 so as to protrude. An appropriate number of the auxiliary poles 15 are provided with a predetermined thickness.
(The insulating layer is peeled off).
The surface of the stator core 5 having the auxiliary pole 15 is provided with an insulating coating so that the stator core 5 does not become conductive even when the end 13 of the coil wire 6 is wound around the auxiliary pole 15.

In the flexible circuit board 16, only the portion 18 having the terminal portions 11 has the prismatic elastic body 1 only.
4 ... so that it can be placed on it.

Then, a portion 18 of the flexible circuit board 16 is placed on each of the elastic members 14 and the ends 13 of the coil wires 6 wound around the auxiliary poles 15 are connected to predetermined terminal portions 11.
The stator 4 is mounted on the bracket 1 in accordance with the position of..., And the end portions 13 of the coil wire 6 and the mating terminal portions 11 are brought into contact with each other by the elastic force of the elastic members 14.

Alternatively, as shown in FIG. 5, the elastic body 14 is brought into contact with the lower surface of the auxiliary pole 15 so that
4 is wound around the end portion 13 of the coil wire 6 (with the insulating layer removed), and the end portions 13 are aligned with the predetermined terminal portions 11 of the flexible circuit board 16 (identical to FIG. 1). hand,
It is also desirable that the stator 4 be attached to the bracket 1 and that the contact be conducted by the elastic force of the elastic members 14.

Also in the embodiments of FIGS. 3, 4 and 5, the end 13 of the coil wire 6 and the flexible circuit board 16
Can be easily and easily connected to the terminal portion 11 without soldering.

The connection structure for electrically connecting the end portion 13 of the coil wire 6 to the terminal portion 11 on the other side can be applied to a motor other than the above-described example.

[0028]

Since the present invention is configured as described above, the following significant effects can be obtained.

According to the first and second aspects, the end portion 13 of the coil wire 6 of the stator 4 and the opposite terminal portion 11 are electrically in direct contact with each other by the elastic force of the insulating elastic body 14. Because it is a configuration that can be done, it is not necessary to insert a soldering iron etc. into a narrow gap and solder it, and there is no need for the problem of contamination that occurs at the time of soldering and the removal process of flux is required, improving work efficiency, In addition, the quality can be stabilized and improved. Particularly, it is suitable for a microminiature precision motor.

[Brief description of the drawings]

FIG. 1 is a sectional front view showing an embodiment of a spindle motor of the present invention.

FIG. 2 is a perspective view of a main part of the spindle motor of FIG. 1 with a part omitted.

FIG. 3 is a sectional front view of another embodiment of the spindle motor of the present invention.

FIG. 4 is a perspective view of a main part of the spindle motor of FIG. 3 with a part omitted.

FIG. 5 is a cross-sectional front view showing a modification.

FIG. 6 is a sectional front view of a conventional spindle motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bracket 4 Stator 5 Stator core 6 Coil wire 7 Hub 8 Rotor magnet 10 Bearing 11 Terminal part 13 End part 14 Elastic body 15 Complementary pole 16 Circuit board 17 Teeth

Claims (2)

(57) [Claims] A hub is rotatably supported by a bracket via a pair of bearings, and a stator is integrally fixed to the bracket so as to face a rotor magnet mounted on the hub. At the same time, in a spindle motor configured to electrically connect the end portion 13 of the coil wire 6 of the stator 4 to the terminal portion 11 of the flexible circuit board 16 mounted on the bracket 1, the spindle motor is wound around the stator 4.
To the coil wire 6 from the bracket 1 side
An elastic body 14 of insulating mounted is provided, wound around the end 13 of the coil wire 6, a portion that is interposed between the flexible circuit board 16 on the coil wire 6 and the bracket 1 of the elastic body 14 Then, the portion of the end portion 13 of the coil wire 6 from which the insulating layer has been peeled in advance is connected to the flexible circuit board 1.
6. A spindle motor characterized in that it is directly pressed against the terminal portion 11 of 6 to make contact conduction. A hub is rotatably supported on the bracket via a pair of bearings, and the stator is integrally fixed to the bracket so as to face a rotor magnet mounted on the hub. In addition, in a spindle motor in which the end portion 13 of the coil wire 6 of the stator 4 is electrically connected to the terminal portion 11 of the flexible circuit board 16 mounted on the bracket 1, a supplement is provided between the teeth 17 of the stator core 5. The protruding pole 15 is formed, and the auxiliary pole 15 is formed.
The end portion 13 of the coil wire 6 is wound around the coil wire 6, and the elastic wire 14 having insulating properties disposed immediately above or immediately below the terminal portion 11 of the flexible circuit board 16 repels the coil wire 6. The portion of the end 13 of the flexible circuit board 16 from which the insulating layer has been peeled off is
A spindle motor characterized in that it is pressed directly to the surface to make contact conduction.