JP2551168Y2 - Disk drive 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 motor for driving various kinds of disks, and more particularly to a structure of a lead-out portion of a coil winding end to the outside.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional example of a drive motor for driving various disks such as a magnetic disk and an optical disk. In FIG. 3, the motor frame 50 includes a cylindrical portion 51 and a flange portion 5 formed near the lower end of the cylindrical portion 51.
Consists of two. Outer rings 58, 58 of ball bearings 56, 56 are press-fitted and fixed in the cylindrical portion 51, respectively, and shafts 80, which are press-fitted and fixed to the center holes of the hub 60, are fixed to the inner rings 57, 57 of the ball bearings 56, 56, respectively. Are fixed by bonding, so that the hub 60 is rotatably supported together with the shaft 80. The hub 60 is for holding and rotating the disc (not shown) integrally, and has a flange 62 for holding the disc at the lower end of the outer periphery and a screw hole 67 for fixing the disc at the upper end. I have.
One or more disks are stacked on the flange portion 62 with an appropriate spacer interposed therebetween, and a clamper is further stacked thereon. The set screw inserted into the clamper is inserted into the screw hole for fixing the disk. By being screwed into 67, the disk is integrally fixed to hub 60.

The hub 60 has a substantially cylindrical shape and surrounds an upper end of the motor frame 50. Flange 6 of hub 60
An upper end of a cylindrical yoke 64 is fixed to the lower surface of 2.
A cylindrical drive magnet 66 is fixed to the inner peripheral surface of the yoke 64. A stator core 68 is fitted and fixed to the cylindrical portion 51 of the motor frame 50 above the flange 52. The stator core 68 has a plurality of salient poles,
Each salient pole faces the inner peripheral surface of the drive magnet 66, and a coil 70 is wound around each salient pole. The drive magnet 66 and a member integral therewith constitute a rotor of a disk drive motor, and the stator core 68 and the coil 70
Constitutes the stator of the motor.

A hole 54 is formed in a flange 52 of the motor frame 50.
Are formed, and a plurality of lead wires 72 respectively connected to a plurality of winding ends of the coil 70 by soldering or the like.
Is inserted through the hole 54 and led out of the motor. The end of each lead wire 72 is connected to a connector 76, and is connected to an external circuit via the connector 76.

[0005]

As described above, in the conventional magnetic disk drive, the lead wires 72 are respectively connected to the plurality of winding terminals of the coil 70, and each lead wire 72 is drawn out of the motor frame 50. Are connected to an external circuit via a connector 76 connected to the end of each lead wire 72. Therefore, to perform a motor test on an assembly line or the like, power is supplied by inserting the connector 76 into the connector on the power supply side.
6 has to be disconnected from the connector on the power supply side, and there is a drawback that the test workability is poor. In addition, since it is necessary to insert and remove the connector for each test, there is a disadvantage that the connector is damaged by repeated insertion and removal.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems of the prior art, and eliminates the need to remove and insert a connector at the time of a test, thereby improving the workability of the test and preventing damage to the connector. An object of the present invention is to provide a disk drive motor that can be eliminated.

[0007]

According to the present invention, a flexible wiring board is provided on the bottom of a frame, a plurality of winding ends of a coil are formed in a hole formed in the frame, and a flexible wiring board is provided. The second land connected to the first land near the first land of the flexible printed circuit board is connected to the first land of the flexible printed circuit board while being led out of the motor through the hole formed in the board.
Of lands.

[0008]

In normal use, power is supplied to the coil via the flexible wiring board, the first land, and the winding end, but the first land is electrically connected to the second land. Therefore, during the test, power can be supplied to the coil by bringing the contact pin into contact with the second land,
No need to use connectors.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disk drive motor according to the present invention will be described below with reference to the drawings. In FIG. 1, a frame 10 has a dish-shaped portion and a tubular bearing holder portion 12 integrally formed at the center thereof, and has a mounting hole 18 at an outer edge portion. The upper and lower two ball bearings 26,
The outer races 28, 28 are press-fitted, and the ball bearing 2
The outer peripheral portion of a tubular shaft portion 24 formed integrally with the center portion of the hub 20 is fixed to the inner rings 29, 29 by bonding or the like. Thus, the hub 20 is rotatably supported. The hub 20 is for holding and rotating a disk (not shown) integrally, is formed in a substantially cylindrical shape, and has a step portion 22 for holding the disk on the outer peripheral side. The lower portion of the hub 20 than the step portion 22 is located inside the dish-shaped portion of the frame 10.
A cylindrical drive magnet 30 is fixed to the inner peripheral portion of the hub 20. The drive magnet 30 is magnetized alternately in the circumferential direction.

A stator core 33 is fitted and fixed on the outer peripheral side of the bearing holder 12 of the frame 10. The stator core 33 has a plurality of salient poles, each salient pole faces the inner peripheral surface of the drive magnet 30, and each salient pole has a coil 3.
2 are wound. The stator 31 is constituted by the stator core 33 and the coil 32. A cutout groove 16 is formed on the bottom surface side of the dish-shaped portion of the frame 10, and a hole 14 is formed in the bottom of the dish-shaped portion of the frame 10 vertically through the bottom. An insulating paper 36 is disposed inside the bottom of the dish-shaped portion of the frame 10. The coil 32 of the stator 31 is located immediately above the insulating paper 36.

As shown in FIG. 2, one end of a flexible wiring board 40 is provided in the notch 16 on the bottom side of the frame 10. As shown in FIG.
6, a hole 38 is formed at a position overlapping the hole 14 of the frame 10, and a hole 42 is also formed at a position overlapping the hole 14 of the frame 10 on the flexible wiring board 40. The diameter of the hole 38 of the insulating paper 36 and the diameter of the hole 42 of the flexible wiring board 40 are smaller than the diameter of the hole 14 of the frame 10. A winding end 34 extends from the coil 32, and the winding end 34 is connected to the insulating paper 36, the holes 10, 14 of the frame 10 and the flexible wiring board 40.
It is led out of the motor through 42. Coil 32
Is composed of a plurality of phases, and a plurality of coil winding ends 34 corresponding to the number of phases are led out through the holes 38, 14, 42. As shown in FIG. 2, each of the derived coil winding ends 34 is radially pulled out from the hole 42 of the flexible wiring board 40, and is connected to a solder land formed on the flexible wiring board 40 by a solder 44. .

The depth a of the notch groove 16 of the frame 10 is
The dimension is larger than the sum of the thickness of the flexible wiring board 40 and the height of the solder 44. By doing so, the solder 44 does not protrude from the notch groove 16 and electrical contact with other components or devices in the motor mounted state can be prevented. On the flexible wiring board 40, test lands 46 are formed in the vicinity of each of the soldering lands so as to correspond to each of the soldering lands.
Assuming that each of the soldering lands is a first land and a test land 46 is a second land, each of the first lands corresponds to the corresponding second land 46 and the flexible wiring board 4.
0 are electrically connected by a conductor pattern. Although not shown, a connector is connected to the distal end of the flexible wiring board 40, and each coil 3 is connected through this connector.
2 can be energized.

Electric power is supplied to the coils 32 of each phase through the wiring pattern of the flexible wiring board 40 and the coil winding ends 34, and the coils 32 of each phase are supplied to the coils 32 of the respective phases in accordance with the rotational position of the hub 20 also serving as the rotor of the motor. , The hub 20 is driven to rotate, and a disk (not shown) is driven to rotate together with the hub 20.

According to the embodiment described above, the frame 1
A flexible wiring board 40 is disposed on the bottom surface of the motor 0, and a plurality of winding ends 34 of the coil 32 are led out of the motor from the holes 14 formed in the frame 10 and the holes 42 formed in the flexible wiring board 40. In addition to connecting to the first lands of the flexible wiring board 40 and arranging the second lands 46 connected to the first lands near the first lands of the flexible wiring board 40,
During the test, the coil 32 can be supplied with power by bringing the contact pins into contact with the second lands 46, and there is no need to use a connector. Therefore, it is not necessary to connect and disconnect the connector when performing a test on an assembly line or the like, so that it is possible to improve the workability of the test, and it is possible to eliminate a defect caused by repeatedly connecting and disconnecting the connector.

In the illustrated embodiment, the shaft 20 is a shaft-rotating motor in which the hub 20 rotates together with the shaft 24.
The present invention is also applicable to a fixed shaft type motor in which a hub rotates with respect to a fixed shaft. Further, the present invention is applicable to a motor for driving a magnetic disk, an optical disk and other various disks.

[0016]

According to the present invention, a flexible wiring board is provided on the bottom surface of a frame, and a plurality of winding ends of the coil are separated from holes formed in the frame and holes formed in the flexible wiring board. It is led out of the motor and connected to the first lands of the flexible printed circuit board.
Since the second land connected to the first land is arranged, the power can be supplied to the coil by bringing the contact pin into contact with the second land during the test, and it is not necessary to use a connector. Therefore, when testing on an assembly line, etc., there is no need to connect and disconnect connectors.
The workability of the test can be improved, and the defect caused by repeatedly inserting and removing the connector can be eliminated.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing an embodiment of a disk drive motor according to the present invention.

FIG. 2 is a bottom view showing a main part of the embodiment.

FIG. 3 is a front sectional view showing an example of a conventional disk drive motor.

[Explanation of symbols]

 10 Frame 14 Hole 20 Hub 30 Drive Magnet 31 Stator 32 Coil 34 Winding End 40 Flexible Wiring Board 42 Hole 46 Second Land

Claims (1)

(57) [Scope of request for utility model registration] 1. A disk drive motor comprising: a hub having a drive magnet fixed inside and driving a disk to rotate; a stator facing the drive magnet and having a coil; and a frame to which the stator is fixed. A flexible wiring board is provided on the bottom surface of the frame, and a plurality of winding ends of the coil are led out of the motor through holes formed in the frame and holes formed in the flexible wiring board, so that the flexible wiring board is First
And a second land connected to the first land near the first land of the flexible printed circuit board.