JPH11234941A - Spindle motor and rotating body device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spindle motor and a rotating body device wherein soldering is used during local assembling operation and is not required during global assembling operation, and the terminals of a motor coil and the conductors printed on a printed board are electrically connected with each other when they are assembled, and thus time required for assembly and manufacturing cost can be reduced. SOLUTION: A printed board A provided with a wire connecting function is stuck to the upper face of a motor frame 4. In the printed board A provided with a wire connecting function, projected terminals 13 are stuck to a board 11 in proximity to wire connecting portions 12a. The projected terminals 13 are formed of a conductive material, and secured on the wire connecting portions 12a with solder 14. Contact portions 13b are brought in contact with conductive pins 6 suspended from a stator 6 in an insulated manner. The conductive pins 16 are electrically connected with the coil terminals 7a of the motor coil 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of soldering at the time of sub-assembly and no soldering at the time of assembling the whole. Can be
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle motor and a rotating body device which can speed up assembly and reduce manufacturing costs, and can surely, quickly, and easily establish a connection state even when a connection space is extremely small.

[0002]

2. Description of the Related Art In the process of assembling an ultra-small electromechanical device, for example, a spindle motor for an HDD, a connection portion between a terminal of a motor coil and a conductive wire on a printed circuit board is extremely small and needs to be soldered. Soldering is done manually. For this reason, productivity cannot be improved and the production cost is high.

[0003] The difficulty in soldering the connection between the terminal of the motor coil and the conductive wire of the printed circuit board in assembling the spindle motor is that the terminal is attached to the coil terminal of the motor coil and the surface of the motor frame facing the motor coil. In the case of a spindle motor in which conductive wires printed on a printed circuit board are connected at the time of assembly, it is necessary to perform soldering by inserting a soldering iron under the stator inside the motor and soldering. Because the coil wire diameter is extremely small, it is necessary to use a microscope to make the solder extremely small, and at that time, the terminal of the motor coil cannot stabilize to the position where it is soldered,
Further, in a spindle motor in which a coil terminal of a motor coil is connected to a conductive wire printed on a printed circuit board attached to an outer surface of a motor frame at the time of assembly,
The reason is that since the coil wire diameter is extremely small, it is necessary to use a microscope to make the solder extremely small, and at that time, the ends of the motor coil do not stabilize to the soldering position.

[0004]

SUMMARY OF THE INVENTION The present invention has been devised in view of the above points, and is soldered at the time of sub-assembly and does not require soldering at the time of overall assembling. Can be electrically connected to the printed conductive line, speeding up assembly and reducing manufacturing costs, and ensuring a quick, easy connection even if the connection space is extremely small. An object of the present invention is to provide a spindle motor and a rotating device.

[0005]

According to the present invention, there is provided a spindle motor having a stator having a motor coil on a motor frame and a printed circuit board for connecting a terminal of the motor coil, wherein the stator is insulated,
Conductive pins for connecting terminals of the motor coil in an electrically conductive state are provided, and the printed circuit board is attached to a surface of the motor frame facing the motor coil, and a conductive material is provided at a position corresponding to the conductive pin. Protruding terminals are provided, and a connection portion is provided in the vicinity of each protruding terminal, and the protruding terminal is electrically connected to the connection portion. An object of the present invention is to provide a spindle motor characterized in that terminals are brought into electrical conduction by contact with each other.

According to the present invention, there is provided a spindle motor having a stator having a motor coil on a motor frame, and a printed circuit board for connecting a terminal of the motor coil. The printed circuit board is provided with conductive pins connected in an electrically conductive state, and the printed circuit board has one surface adhered to the outer surface of the motor frame, and the other surface of the printed circuit board has a projection formed of a conductive material at a position corresponding to the conductive pins. A terminal is attached, a connection portion is provided in the vicinity of each protruding terminal, and the protruding terminal is electrically connected to the connection portion, and the protruding terminal is connected to the motor frame. The conductive pin is arranged so as to face the conductive pin through the provided small hole, and the conductive pin and the protruding terminal come into contact with each other to be in an electrically conductive state. It is to provide a Rumota.

Further, the present invention provides a spindle motor characterized in that a small hole is provided in the conductive pin, and the small hole is entangled with the terminal of a motor coil or electrically connected by soldering. It is in. Another object of the present invention is to provide a rotator device characterized by using a spindle motor as a rotary drive source.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. 1 (a), 1 (b) and 1 (c). FIG.
(A) shows a spindle motor according to one embodiment of the present invention. FIG. 1B shows a printed circuit board with a connection function mounted on a spindle motor.

FIG. 1C shows a connection state between a coil terminal of a motor coil and a conductive line of a printed circuit board having a connection function. As shown in FIG. 1A, the spindle motor M1
Is an ultra-thin and ultra-small spindle motor equipped with a fluid dynamic pressure bearing. The thrust bearing 1a has a thrust dynamic pressure generating groove formed on both sides thereof. The rotating shaft 1 having the radial bearing portion 1 c provided with the dynamic pressure generating groove, the housing 2, the holding ring 3, the motor frame 4 supporting the housing 2, and the support shaft portion 1 b of the rotating shaft 1 are covered with the rotating shaft 1. A rotor 5 fitted and fixed, a stator 6 press-fitted and fixed to the outer periphery of the housing 2, for example, a four-pole motor coil 7 provided on the stator 6, a permanent magnet 8 provided on the rotor 5, The magnet 9 for the media chuck fixed to the upper surface and the motor frame 4
And a printed circuit board A with a connection function attached to the upper surface of the rotating shaft 1 and lubricating oil is filled around the rotating shaft 1.

As shown in FIG. 1 (c), a small hole 6a is provided in the outer periphery of the stator 6, and a flanged insulating cylinder 15 is provided in the small hole 6a.
Are inserted from below. Further, in the insulating tube 15,
The upper part of the conductive pin 16 having a flange in the middle is fitted. The conductive pin 16 is provided with a small hole 16a,
Here, the terminal 7a of the motor coil 7 is passed therethrough and soldered or entangled to establish an electrically conductive state. When the coil end 7a of the motor coil 7 is covered with an insulating protective film, the motor coil 7 is passed through the small hole 16a after removing the insulating protective film.

As described above, if the terminal 7a of the motor coil 7 is sub-assembled by being connected to the conductive pin 16, soldering is not required at the time of subsequent overall assembly.
Assembly work can be simplified. As shown in FIGS. 1 (b) and 1 (c), a printed circuit board A with a connection function has a magnifying glass frame-shaped substrate 11 composed of an annular part and a straight part, and has eight connection parts 12a at both ends. Are printed and wired, and protruding terminals 13 are adhered to the substrate 11 in the vicinity of the connection portions 12a. The protruding terminal 13 is
It is formed of a conductive material, and has a base portion 13a and a contact portion 13b protruding from the base portion 13a. Base 13
a is bonded on the substrate 11 at a position facing the conductive pin 16 and is electrically connected to the connection portion 12a by soldering. Projecting terminal 13 and connection portion 12a
May be connected by bonding instead of the solder 14. Alternatively, the protruding terminal 13 may be attached to a position overlapping the connection portion 12a with a conductive adhesive.

A printed circuit board A having a wiring function is provided on a surface of the motor frame 4 facing the motor coil 7 by a double-sided tape 1.
It should just be stuck by 0. If the stator 6, which is a sub-assembly of the motor coil 7, the flanged insulating cylinder 15, and the conductive pin 16, is fixedly fitted to the housing 2, the conductive pin 16 and the protruding terminal 13 are opposed to each other and are connected in an electrically conductive state. . Therefore, there is no need to solder the terminal 7a of the motor coil 7. The number of poles and the number of lines are not limited.

The substrate 11 is a rigid substrate made of paper epoxy resin, bakelite, or glass epoxy resin, but may be a flexible substrate made of a heat-resistant film such as polyimide. When printed wiring on a heat-resistant film, laminated with another sheet of heat-resistant film, and exposed at the connection portion of the end of the conductive wire 12 printed and wired without lamination,
The durability of the conductive wire 12 can be ensured and an electric short can be avoided.

Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to (a), (b), and (c). FIG.
As shown in FIG. 2A, a spindle motor M2 according to this embodiment uses a printed circuit board B with a connection function shown in FIG. 2B instead of the printed circuit board A with a connection function shown in FIG. The point provided on the lower surface of the motor frame 4 is different from the spindle motor of the first embodiment shown in FIG.

As shown in FIG. 2A, the printed circuit board B having a connection function is attached to a concave portion 4a formed on the lower surface of the motor frame 4 with a double-sided tape 10. FIG.
As shown in (b) and (c), the printed circuit board B having a connection function is composed of eight conductive members having a connection portion 12a at both ends of a magnifying glass frame-shaped substrate 11 composed of an annular portion and a straight portion. The wires 12 are printed and wired, and the protruding terminals 13 are adhered to the substrate 11 in the vicinity of the connection portions 12a. The protruding terminal 13 is formed of a conductive material, and has a base 13a and a contact portion 13b protruding from the base 13a. The base 13a is adhered on the substrate 11 at a position facing the conductive pins 16, and is connected to the connection portion 12a in an electrically conductive state by soldering. Contact part 1
3b is passed through a small hole 11a provided in the substrate 11, further passed through a small hole 4b provided in the motor frame 4 at the time of overall assembly, enters the surface facing the stator, and faces the conductive pin 16. Contact this.

As shown in FIG. 2A, a small hole 6a is provided in the stator 6, and a flanged insulating cylinder 15 is fitted into the small hole 6a from below. Further, the flanged insulating tube 15 has
The upper part of the conductive pin 16 having a flange in the middle is fitted. The conductive pin 16 is provided with a small hole 16a, through which the terminal 7a of the motor coil 7 is passed.
Alternatively, it is in an electrically conductive state by being entangled.

As in the first embodiment, when the stator 6 in which the motor coil 7, the flanged insulating cylinder 15 and the conductive pin 16 are sub-assembled is fixed to the housing 2, the conductive pin 16
And the protruding terminals 13 are opposed to each other and are brought into electrical conduction. Therefore, it is not necessary to solder the terminal 7a of the motor coil 7 to the printed circuit board B. In this embodiment, since the board is not mounted inside the motor, the gap between the motor coil 7 and the motor frame 4 can be further reduced. Since there is no need to disassemble the rotor 5, it is not necessary to disassemble the rotor 5, so that a connection failure can be corrected without lowering the assembly accuracy. In addition, the space required for the connection work can be sufficiently secured, and furthermore, since there is no need for soldering or bonding during the entire assembly, the connection can be performed quickly and easily.

The other components of the spindle motor of this embodiment are the same as those of the spindle motor of the first embodiment. FIG. 3 shows a rotator device employing the spindle motor M1 of FIG. 1 as a rotary drive source. This rotator device is a hard disk device, and is formed by attaching a rotating disk D such as a magnetic disk or an optical disk to a rotor of a spindle motor M1. The rotator device,
It has the functions, functions and effects of the spindle motor of the present invention.

[0019]

As described above, according to the spindle motor and the rotator device of the present invention, soldering is performed at the time of sub-assembly and soldering is unnecessary at the time of overall assembling. Electrical connection can be made between the conductive lines printed on the printed circuit board, speeding up assembly and reducing manufacturing costs, and ensuring reliable, quick and easy connection even if the connection space is extremely small. Can be.

[Brief description of the drawings]

FIG. 1 relates to a spindle motor according to a first embodiment of the present invention, in which (a) shows a longitudinal sectional view of the spindle motor, (b) is a sectional view taken along Ib-Ib in (a),
(C) is an enlarged sectional view of a connection point between a motor coil and a conductive wire on a printed circuit board.

FIG. 2 relates to a spindle motor according to a second embodiment of the present invention, in which (a) shows a longitudinal sectional view of the spindle motor, (b) is a view taken along the line IIb-IIb in (a),
(C) is an enlarged sectional view of a connection point between a motor coil and a conductive wire on a printed circuit board.

FIG. 3 is a schematic perspective view of a rotator device employing the spindle motor of FIG. 1 as a rotary drive source.

[Explanation of symbols]

 M1 Spindle motor 1a Thrust bearing 1b Support shaft 1c Radial bearing 1 Rotary shaft 2 Housing 3 Holding ring 4 Motor frame 5 Rotor 6 Stator 6a Small hole of stator 7 Motor coil 7a Coil terminal 8 Permanent magnet 9 Magnet for media chuck 10 Double-sided tape A Printed circuit board with connection function 11 Substrate 12 Conductive wire 12a Connection section 13 Projecting terminal 13a Base 13b Contact section 14 Solder 15 Insulation cylinder 16 Conductive pin M2 Spindle motor B Printed circuit board with connection function 11a Small hole D Rotating disk

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Isamu Takehara 1-8-1, Nakase, Mihama-ku, Chiba-shi Inside Seiko Instruments Inc. (72) Inventor Takashi Ishida 1-8-1, Nakase, Mihama-ku, Chiba-shi, Chiba Inside Iko Instruments Co., Ltd. (72) Inventor Shinichi Hayashizaki 1-8-1, Nakase, Mihama-ku, Chiba City, Chiba Prefecture Inside Inko Instruments Co., Ltd. (72) Hiromasa Shimaguchi 1-8-1, Nakase, Mihama-ku, Chiba City, Chiba Inside Instruments Co., Ltd. (72) Inventor Katsushige Konno 1-8-8 Nakase, Mihama-ku, Chiba-shi, Chiba Seiko Instruments Inc.

Claims (4)

[Claims] 1. A spindle motor having a stator having a motor coil on a motor frame and a printed circuit board connecting a terminal of the motor coil, wherein the stator is insulated to electrically connect the terminal of the motor coil. A conductive pin connected in a conductive state is provided; the printed circuit board is affixed to a surface of the motor frame facing the motor coil; and a protruding terminal made of a conductive material is provided at a position corresponding to the conductive pin. A connection portion is provided in the vicinity of each protruding terminal, and the protruding terminal is connected to the connection portion in an electrically conductive state. A spindle motor characterized by being in a state. 2. A spindle motor having a stator having a motor coil on a motor frame and a printed circuit board connecting a terminal of the motor coil, wherein the stator is insulated to electrically connect the terminal of the motor coil. A conductive pin connected in a conductive state is provided. One side of the printed circuit board is attached to an outer surface of the motor frame, and a protruding terminal made of a conductive material is provided on the other side at a position facing the conductive pin. A connection portion is provided in the vicinity of each protruding terminal, and the protruding terminal is electrically connected to the connection portion, and the protruding terminal is provided on the motor frame. A spindle motor disposed so as to face the conductive pin through a small hole, wherein the conductive pin and the protruding terminal come into contact with each other to be in an electrically conductive state; Ta. 3. The conductive pin according to claim 1, wherein a small hole is provided in the conductive pin, and the small hole is entangled with a terminal of a motor coil or electrically connected by soldering. Spindle motor. 4. A rotary body device comprising the spindle motor according to claim 1 as a rotary drive source.