JPS63138563A - Spindle motor mechanism for floppy disk device - Google Patents

Abstract

PURPOSE:To simplify a motor fitting process by screwing directly a motor housing at the screw structure part of the frame of a disk device main body. CONSTITUTION:A housing 20 of a spindle motor formed by the housing 20, a rotor 14, a bearing part 15 and a circuit board 16 is half-fixed to the motor fitting part of a frame 21 of a disk device main body, the board 16 is positioned to the frame 21 and by using a positioning pin 19 penetrated into the frame 21 as a guide, the position of the substrate 16 is determined. Next, when the housing 200 only is turned with an apparatus 24 for rotation from the surface side of the frame 21 at an opposite side with a rotor 14, the housing 20 is directly screwed to the screw structure of the frame 21 and a spindle motor is simply fitted with a simple fitting process.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a spindle motor mechanism of a floppy disk device, which is a disk rotation mechanism.

(Prior Art) Conventionally, a floppy disk device is provided with a spindle motor that constitutes a rotation mechanism for rotating a magnetic recording medium (disk). A DC direct drive motor is normally used as the spindle motor.

The rotation mechanism, as shown in FIG. 3 (partial side sectional view), includes a spindle hub 10 that supports the disk, a spindle shaft 11, and a spindle motor 12.

The spindle motor 12 includes a housing 13, a rotor 14, a bearing part 15, and a circuit board 16, which constitute a motor body.
Consisting of The housing 13 is attached to the motor mounting portion of the frame 17 of the main body of the disk device. The circuit board 16 includes a motor coil, an index sensor, and the like.

Incidentally, the spindle motor 12 is attached to the frame 17 together with the circuit board 16 by screws 18 at four locations, for example. Note that the circuit board 16 is positioned at a predetermined position of the frame 17 by positioning pins 19 in order to position the index sensor.

Further, as shown in FIG. 4, the spindle motor 12 is attached to the frame 17 by screws 18 at two predetermined locations on the housing 13.

However, the mounting method described above requires four or two screws 18, and requires work to tighten the screws four or two times.

(Problems to be Solved by the Invention) Conventionally, when attaching the spindle motor 12 to the frame 17 of the disk device main body, a plurality of screws and work to tighten the screws are required. For this reason, in the manufacturing process of the optical disc, the spindle motor 1
There is a problem with the installation work of item 2, which causes a decrease in manufacturing efficiency.

SUMMARY OF THE INVENTION An object of the present invention is to provide a spindle motor mechanism for a floppy disk device that can simplify the process of attaching the spindle motor to the main body of the device in the manufacturing process of the floppy disk device.

[Structure of the Invention] (Means and Effects for Solving the Problems) The present invention provides a spindle motor mechanism that is attached to the frame of a floppy disk device, in which the motor has a screw structure formed on the frame. It is a mechanism equipped with a spindle motor consisting of a motor body with a screw structure that can be fitted.

Such a mechanism allows the spindle motor itself to be directly attached to the frame without using multiple screws.

(Example) The present invention will be described in detail below with reference to the drawings. FIG. 1 is a side sectional view showing the configuration of the spindle motor mechanism of the same embodiment. In FIG. 1, the spindle motor includes a housing 20. The bearing 14 consists of a portion 15 and a circuit board 16. The housing 20 is made of a metal material, and its peripheral portion, which serves as a fastening portion to the motor mounting portion of the frame 21 of the floppy disk device main body, is formed to have a threaded structure (for example, a male threaded structure).

On the other hand, the motor attachment part 25 of the frame 21 is formed like a screw structure (for example, a female screw structure) that can be fitted into the housing 20.

Next, the effects of this embodiment will be explained. First, with the spindle motor housing 20 semi-fixed to the motor mounting portion of the frame 21, the circuit board 16 is attached to the frame 2.
Perform positioning with respect to 1. This is normally 3.5
An index sensor is attached to the circuit board 16 in the case of inch disk mounting, and this is for positioning the index sensor. In this positioning, the position of the circuit board 16 is determined using a positioning pin 19 inserted through the frame 21 as a guide.

Next, while rotating only the motor housing 20 from the surface side of the frame 21 opposite to the rotor 14, the screw structure portions of the housing 20 and the motor mounting portion 25 of the frame 21 are fitted together. At this time, the circuit board 16 does not rotate, and when the housing 20 is fitted, it is fixed to the frame 21 while being sandwiched between the grooves 22 of the housing 20 as shown in FIG. .

Here, when rotating the housing 20, as shown in FIG. Insert the motor tool 24 and rotate it.Thereby, the motor mounting part 25 of the frame 21 is attached to the housing 2.
0 is fastened and the spindle motor is installed.

In this manner, the housing 20 and the frame 21 are provided with a threaded structure that allows them to fit into the motor mounting section 25, so that the spindle motor can be attached to the mounting section of the disk device main body. In this case, by directly attaching the housing 20 to the frame 21 without using any screws, the work of tightening multiple screws can be omitted. Therefore, since the plurality of attachments can eliminate the need for screws and their screw tightening work, it is possible to reduce the number of parts and the number of steps in the assembly process. In addition, in the same example, 3.5
Although the description has been made assuming a 5.25-inch floppy disk device, the present invention can also be applied to a 5.25-inch floppy disk device.

[Effects of the Invention] As detailed above, according to the present invention, when attaching the spindle motor of a floppy disk device to the main body of the device,
For multiple attachments, the motor body can be directly attached to the frame of the device body without using screws. Therefore, multiple attachment screws and the screw tightening operations required in the conventional manufacturing process can be eliminated.

Therefore, the installation process of the spindle motor can be simplified, and the entire manufacturing process of the floppy disk device can be made more efficient.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing the configuration of a spindle motor mechanism according to an embodiment of the present invention, and FIG. 2 is a plan view of the same embodiment.
3 and 4 are side sectional views showing a partial configuration of a conventional spindle motor mechanism, respectively. 10... Spindle hub, 11... Spindle shaft,
13゜20...Housing, 14...Rotor, 15
...Bearing is part, 16...Circuit board, 17.21...
・Frame, 23...hole, 24...rotating device.

Claims (1)

[Claims] A frame constituting a disk device main body, a spindle hub that supports a disk inserted into the disk device main body, a spindle shaft that rotates this spindle hub, and a screw-structured motor mounting portion formed on the frame. 1. A spindle motor mechanism for a floppy disk device, comprising a spindle motor for rotationally driving the spindle shaft, the motor body having a fittable screw structure.