JP2653343B2 - Disk rotating device of disk drive device and method of assembling the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk rotating device of a disk drive for rotating a disk of a disk cartridge mounted on the device, and a method of assembling the disk rotating device.

[0002]

2. Description of the Related Art In a conventional disk rotating device of a disk drive device, a rotating shaft 9 of a motor is rotatably supported in a hole 7 of a chassis 3 as shown in FIG. This rotating shaft 9
The chucking portion 12 is attached to one surface of the chassis 3, and the rotor portion 13 is attached to the other surface of the chassis 3. The chucking unit 12 is provided with a rotating shaft 9.
A support member 15 having a hole 14 into which the pressure is inserted and a table portion 16 fixed to the support member 15. The table 16 has a pin 17 projecting therefrom and a positioning groove 18 formed in the outer periphery. The rotor portion 13 includes a support portion 20 press-fitted into the rotating shaft 9 and the support portion 2.
The magnet support plate 21 is fixed to 0 and a magnet 22 is attached to one surface of the magnet support plate 21. The support portion 20 has a positioning hole 38 formed in addition to the hole 19 into which the rotating shaft 9 is press-fitted. An index magnet portion 23 is provided on the outer peripheral surface of the magnet support plate 21.
Is protruding.

The chucking section 12 and the rotor section 1
Since the chassis 3 is required to be attached to the rotating shaft 9 when the chassis 3 is mounted on the rotating shaft 9, the positioning groove 18 of the chucking portion 12 and the positioning hole 38 of the rotor portion 13 are used to mount the chassis 3. The mounting position is determined and the mounting is performed. Since the relative positional relationship between the chucking unit 12 and the rotor unit 13 is fixed, the rotational positions of the disk chucked by the chucking unit 12 and the rotor unit 13 are constant. Then, an index position serving as a reference for data read / write is detected based on the rotation position of the index magnet unit 23. Therefore, the chucking section 12 and the rotor section 1
If the relative positional relationship with the index 3 shifts, the index position also shifts.

[0004]

However, in the conventional disk rotating device, since the positioning hole 38 is provided in the support portion 20 of the rotor portion 13 as described above, the hole 19 serving as the rotation center and the positioning hole 38 are not provided. Is small, a small mounting error can occur even if the positioning hole 38 is slightly displaced. Therefore, considerable effort and time were spent for electrical adjustment.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a disk rotating device of a disk drive and a method for assembling the disk rotating device, in which the accuracy of mounting the chucking portion and the rotor portion is improved.

[0006]

In order to achieve the above object, according to the present invention, a hole is provided at each center position of a chucking portion and a rotor portion of a motor, and a positioning portion is provided at a position other than each center position. The chucking portion is arranged on one side of the chassis that rotatably supports the rotating shaft of the motor and the rotor portion is arranged on the other side, and both the chucking portion and the rotor portion are provided. In a disk rotating device of a disk drive device in which the rotary shaft is inserted and fixed in each hole of the chucking portion and the rotor portion in a state where the relative rotation position is specified by the positioning portion, The positioning portion is provided on the outermost periphery of a magnet support plate of the rotor portion.

In another aspect of the present invention, a step of providing a hole at each center position of the chucking portion and the rotor portion of the motor and a positioning portion at each outermost position are provided. Using a pair of jig parts whose positions are kept constant, the chucking part is positioned on one of the pair of jig parts and the hole and the positioning part are positioned and supported, and the other part is the rotor part. A step of positioning and supporting the hole and the positioning portion; and a rotor supported on one side of the chassis by a chucking portion supported by one jig portion and the other by a second jig portion Parts are arranged, and both ends of a rotating shaft rotatably supported by the chassis are inserted and fixed in the respective holes of the chucking part and the rotor part by bringing both jig parts close to each other. And the step of performing

[0008]

According to the above two inventions, since the distance from the rotation center of the rotor section to the positioning section is long, a slight displacement of the positioning section does not cause a large mounting error.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, a cartridge holder 1 has a cartridge accommodating chamber 2 and moves between an unloading position which is far from the chassis 3 and a loading position which is close to the chassis 3. A magnetic head device 4 is slidably mounted on the chassis 3, and the magnetic head device 4 slides on the magnetic head device 5.
Is moved in the radial direction of the disk 6. A hole 7 is formed in the chassis 3, and a rotating shaft 9 of a motor 8 is inserted into the hole 7. A ball bearing 10 and a metal bearing 11 are interposed between the rotating shaft 9 and the chassis 3, and the rotating shaft 9 is rotatably supported by the chassis 3. A chucking portion 12 is fixed to an upper portion of the rotating shaft 9 (one surface of the chassis 3), and a rotor portion 13 of the motor 8 is fixed to a lower portion of the rotating shaft 9 (the other surface of the chassis 3).

The chucking portion 12 includes a support member 15 having a hole 14 through which the rotating shaft 9 is inserted,
The table core 16 is fixed to the outer peripheral portion of the disk drive 5 and a pin portion 17 protruding from the table portion 16. The center core of the disk cartridge located at the loading position is chucked. A positioning groove 18 serving as a positioning portion is formed on an outer peripheral portion of the table portion 16.

The rotor portion 13 has a support portion 20 having a hole 19 into which the rotating shaft 9 is press-fitted, a ring-shaped magnet support plate 21 fixed to the outer periphery of the support portion 20, and a lower surface of the magnet support plate 21. And a magnet 22 attached thereto. On the outer peripheral surface of the magnet support plate 21, an index magnet portion 23 and a positioning protrusion 24 as a positioning portion are provided so as to protrude. A detection sensor 25 is fixed to the chassis 3 so as to be located at an opposing position on the rotation locus of the index magnet section 23. Further, a stator portion 26 of the motor 8 is provided at a position facing the rotor portion 13. The stator section 26 includes a coil section 27 and a stator yoke plate 28. The coil section 27 is attached to a printed board 29 fixed to the chassis 3, and the stator yoke board 28 is attached to the printed board 29 with screws 30. .

When the disc cartridge 31 is held by the cartridge holder 1 and located at the loading position, the center core 32 of the disc 6 is chucked by the chucking portion 12 and can be rotated by the drive of the motor 8. At the same time, the magnetic head 5 is pressed against the upper and lower surfaces of the disk 6 to enable recording and reproduction. The rotation of the rotor 13 causes the index magnet 23 to be detected by the detection sensor 2.
5, the detection sensor 25 emits an output to detect the index position of the disk 6.

Next, the attachment of the chucking portion 12, the rotor portion 13, and the like to the chassis 3 will be described.

In FIG. 2, the jig device has a pair of jig portions, an upper jig portion 35 and a lower jig portion 36, and their relative positions are kept constant. The upper jig portion 35 is provided with a cylindrical portion 35a and a pin portion 35b, and the lower jig portion 36 is provided with a pin portion 36a and a plate portion 36c having a groove 36b.

First, the metal bearing 11 is inserted into the hole 7 of the chassis 3.
And the ball bearing 10 and the chucking portion 1
The rotary shaft 9 is pressed into the hole 14 of the second support member 15. Next, the rotary shaft 9 is inserted into the cylindrical portion 35a of the upper jig portion 35, and the pin portion 35b of the upper jig portion 35 is inserted into the positioning groove 18 of the chucking portion 12, so that the rotary shaft 9 is press-fitted. The king part 12 is supported by the upper jig part 35. Also, the pin 36a of the lower jig 36 is inserted into the hole 19 of the support 20 of the rotor 13, and the positioning projection 24 of the rotor 13 is inserted into the groove 36b of the plate 36c of the lower jig 36. The rotor 13 is supported by the lower jig 36.

Finally, the rotating shaft 9 is inserted into the hole 7 of the chassis 3 (specifically, the hole of the ball bearing 10 and the metal bearing 11) by bringing the upper jig portion 35 and the lower jig portion 36 closer to each other. When the lower end of the rotating shaft 9 is pressed into the hole 19 of the support portion 20 of the rotor portion 13, the operation is completed.

Since the chucking section 12 is positioned on the upper jig section 35 and the rotor section 13 is positioned on the lower jig section 36, the chucking section 12 and the rotor section 13 have a relatively fixed positional relationship. It can be held and mounted. And
Positioning of the rotor portion 13 with the lower jig portion 36 is performed by the hole 19 and the positioning protrusion 24. Since the distance 1 from the center of the hole 19 to the positioning protrusion 24 is long, a small positional displacement causes a large mounting error. It can be mounted accurately without becoming

FIG. 3 shows another embodiment of the rotor portion 13. In this embodiment, the positioning portion is constituted by a positioning groove 37 formed in the magnet support plate 21. Even with such a configuration, the same operation and effect as in the above embodiment can be obtained.

[0020]

According to the present invention as described above, according to the present invention, it is provided with the positioning portion of the rotor portion for positioning the chucking section to the outermost circumference of the magnet support plate of the rotor portion, the upper
The positioning part is formed on the support part of the rotating shaft on the inner peripheral side of the rotor part.
The positioning part can be formed more easily than when
In addition to this, there is an effect that relative mounting accuracy between the chucking portion and the rotor portion is improved, and electrical adjustment after mounting is facilitated.

According to another aspect of the present invention, a hole is provided at each central position between the chucking portion and the rotor portion of the motor, and a positioning portion is provided at each outermost peripheral position. The chucking portion and the rotor portion are positioned and supported by a pair of jig portions kept constant, and then the chucking portion and the rotor portion are brought close by bringing the pair of jig portions closer to each other. Since it is fixed to the rotating shaft, there is an effect that relative mounting accuracy between the chucking portion and the rotor portion is improved, and electrical adjustment after mounting is facilitated.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a disk drive device (embodiment).

FIG. 2 is an exploded perspective view showing attachment of a chucking portion and a rotor portion (example).

FIG. 3 is a perspective view of a rotor unit (another embodiment).

FIG. 4 is an exploded perspective view showing an attachment between a chucking portion and a rotor portion (conventional example).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 ... Chassis 8 ... Motor 9 ... Rotating shaft 12 ... Chucking part 13 ... Rotor part 14, 19 ... Hole 18, 37 ... Positioning groove (positioning part) 24 ... Positioning protrusion (positioning part)

Claims (2)

(57) [Claims] 1. A surface of a chassis in which holes are provided at respective center positions of a chucking portion and a rotor portion of a motor, and positioning portions are provided at positions other than the respective center positions, and a rotation shaft of the motor is rotatably supported. The chucking portion is disposed on the other side, and the rotor portion is disposed on the other surface, and the relative rotation position is specified by the positioning portions of both the chucking portion and the rotor portion. in disk rotating apparatus of a disk drive apparatus wherein the fixed inserting the rotary shaft into the hole of the part and the rotor part, the positioning portion of the rotor portion of the rotor portion Magne
A disk rotation device for a disk drive device provided on the outermost periphery of a slot support plate . 2. A step of providing a hole at each center position of the chucking portion and the rotor portion of the motor, and providing a positioning portion at each outermost position, and then, a pair of relative positions kept constant. The jig portion is used to position and support the chucking portion in one of the pair of jig portions by positioning the hole and the positioning portion, and the other is to rotate the rotor portion in the hole and the positioning portion. Next, a chucking portion supported by one jig portion and a rotor portion supported by the other jig portion are arranged on both sides of the chassis. A step of inserting and fixing both ends of a rotating shaft rotatably supported by the chassis into the respective holes of the chucking portion and the rotor portion by bringing the jig portions closer to each other. Disk drive device Method of assembling a disk rotating device.