JPH067481Y2 - Floppy disk drive disk table - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a disk table of a floppy disk drive for driving a magnetic disk having a hub having a spindle hole and a guide roller hole at the center thereof. In particular, it relates to a thin disk table of a floppy disk drive.

[Prior Art] A conventional disk table of a floppy disk for driving a magnetic disk having a hub having a spindle hole and a guide roller hole formed in the center thereof will be described with reference to FIGS. . FIG. 6 is a plan view of the disk table (1), and FIG. 7 is a bottom view. In the figure, the disk table (1) fitted to the spindle (2) of the direct drive motor (not shown) is made of a magnetized material such as a plastic magnet and has a flange at the lower center thereof. (3) is provided. An L-shaped locking portion (4) in side view is formed on one side of the flange (3) so that a spring (5) described later can be locked. In addition, one end of a doglegged drive lever (6) is pivotally attached by a pivot pin (7) near the outer side of the lower surface of the disc table (1), and the other end is bent downward to form a spring.
The engaging part (8) of (5) is provided. A guide roller (9) is provided near the engaging portion (8) in an upward direction, and is loosely inserted in an oval guide hole (10) opened in the disc table (1). Further, a J-shaped spring (5) is wound around the pivot pin (7), and both ends thereof are brought into contact with the engaging portion (4) and the engaging portion (8), to Drive lever as indicated by the arrow
(6) is urged outward and upward. An extremely thin resin thrust washer (11) is bonded to the center of the upper surface of the disc table (1).

On the other hand, FIG. 9 shows the back surface of the floppy disk (12) mounted and driven on the disk table (1). In the figure, (13) is a case, and (14) is a slide cover. A circular hole (15) is opened in the center of the case (13),
A metal hub (17) glued to the center of the magnetic disk (16)
Is exposed. Then, a spindle hole (18) is opened in the center of the hub (17), and a guide roller hole is formed from the outer edge.
(19) is provided. Then, the floppy disk (12)
When inserted into a floppy disk drive (not shown), as shown in FIG. 10, the hub (17) is attracted to the magnetized disk table (1) and the spindle (2) is inserted into the spindle hole (18). And the hub (17) presses the guide roller (9) to tilt the drive lever (6) downward. In that case, since the disc table (1) rotates, the disc table (1) slides with respect to the hub (17), and the guide roller (9) has a guide roller hole provided in the hub (17).
Reach position (19). Then, as shown in FIG.
The drive lever (6) is swung upward by the bias of the spring (5), and the guide roller (9) engages with the guide roller hole (19) to rotate the magnetic disk (16).

[Problems to be Solved by the Invention] A disk table of a floppy disk drive for driving a magnetic disk having a hub having a spindle hole and a guide roller hole formed in the center of the above-described conventional disk table is a tip of a drive lever provided on the lower surface. Since the portion is bent downward and the spring is engaged with the bent portion, the thickness of the entire disc table is large. In addition, when mounting the micro floppy disk, it is necessary to widen the space between the disk table and the front cover so that the drive lever tilts downward and does not interfere with the front cover of the motor. This is an obstacle to making the drive thinner. Therefore, there arises a technical problem to be solved in order to attach the disk table and the front cover close to each other and reduce the total height, and the present invention aims to solve the problem.

[Means for Solving the Problems] The present invention has been proposed in order to achieve the above object, and is a floppy disk for driving a magnetic disk having a hub having a spindle hole and a guide roller hole at the center thereof. A disk table in which one end of a drive lever is pivotally attached to the lower surface of a disc table of a drive, and a guide roller pivotally attached to the other end is projected upward from a guide hole opened in the disc table by biasing a spring. In this case, one end of the spring is locked to a locking part provided on the lower surface of the disc table, and an engaging hole is opened at an appropriate position of the drive lever, and the other of the spring is inserted in the engaging hole. A disk table of a floppy disk drive, characterized in that the end portion is bent upward so that the drive lever is biased upward and outward. It is intended to provide a bull.

[Operation] According to the present invention, the engagement hole of the spring is opened at an appropriate position of the drive lever without press-fitting the spindle of the motor and bending the tip of the drive lever of the disk table downward. Then, the other end of the spring whose one end is locked to the lower surface of the disc table is bent upward and inserted into the engagement hole. As a result, the overall height of the drive lever is significantly reduced, the protrusion height of the front surface of the motor can be reduced, and the overall thickness of the device can be reduced.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 5 of the attached drawings. For the convenience of explanation, a conventionally known technique will be described at the same time. Further, the same reference numerals are used for the parts having the same configurations as those used in the conventional example. First
As shown in the plan view and the bottom view of FIG. 2, the drive lever (20) is provided near the outer edge of the lower surface of the disc table (1).
One end of the is pivotally supported by a pivot pin (7) so that it can swing back and forth and left and right. A guide roller (9) is rotatably attached to the upper surface of the other end of the drive lever (20), and a long hole for inserting a spring is opened in the vicinity of the guide roller (9) to engage the engaging hole (21).
I am trying. Then attach the spring (22) to the pivot pin.
Side view L wound around (7) and having one end bored in the flange (3)
It is locked to the character-shaped locking part (4), and the other end is bent upward and inserted into the engagement hole (21). The spring (22) urges the drive lever (6) outwardly upward, and the guide roller (9) is projected upward from the guide hole (10) opened in the disc table (1) as shown in FIG. Let Even when the hub (17) of the floppy disk (12) presses the guide roller (9) downward as shown in FIG. 4, there is no part protruding below the lower end of the flange (3). Disk table
The total height of (1) hardly changes. Therefore, the space (L1) from the front cover (23) of the motor is set to the conventional example shown in FIGS.
Formed to be much smaller than the space (L2) shown in the figure, and
Similarly, (2) is shortened.

Then, the disk table (1) attracting the hub (17) rotates, and the guide roller (9) fits into the guide roller hole (19) to rotate the magnetic disk (16) as shown in FIG. It's blaming.

Therefore, the present invention can be modified in various ways without departing from the spirit of the invention, and it goes without saying that the invention extends to the modified version.

[Effects of the Invention] As described in detail in the above-mentioned one embodiment, the present invention opens the engagement hole of the spring in the drive lever and bends the tip of the spring upward to form the engagement hole. Is engaged with. Therefore, there is no protruding portion on the lower surface of the drive lever, and even when the drive lever swings downward, it does not protrude below the flange of the disk table, so that the distance between the disk table and the front cover of the motor is extremely small. Therefore, the overall height of the floppy disk drive is remarkably reduced, which contributes to the reduction in thickness.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 5 show an embodiment of the present invention. FIG. 1 is a plan view of a disk table, FIG. 2 is a bottom view of the same, and FIG. Sectional views, FIGS. 4 and 5 are partially cutaway side sectional views showing operating states of essential parts, FIGS. 6 to 8 show conventional examples, FIG. 6 is a plan view, and FIG. Bottom view, FIG. 8 is a partial cutaway side cross-sectional view, FIG. 9 is a bottom view of a floppy disk, and FIGS. 10 and 11 are partial cutaway side cross-sectional views showing an operating state of a conventional example, respectively. . (1) …… Disk table (2) …… Spindle, (3) …… Flange (4) …… Locking part, (5) (20) …… Spring (6) …… Drive lever, (8)… … Engagement part (9) …… Guide roller, (10) …… Guide hole (17) …… Hub, (20) …… Drive lever (21) …… Engagement hole, (23) …… Front cover

Claims (1)

[Scope of utility model registration request] 1. A lower end of a disk table of a floppy disk drive for driving a magnetic disk having a hub having a spindle hole and a guide roller hole at the center thereof, and one end of a drive lever is pivotally attached to the other end. In the disc table in which the attached guide roller is projected upward from the guide hole opened in the disc table by the biasing force of the spring, one end of the spring is engaged with a locking portion provided on the lower surface of the disc table. While stopping, the engaging hole is opened at an appropriate position of the drive lever, and the other end portion of the spring is bent and inserted into the engaging hole so that the drive lever moves upward and outward. A disk table of a floppy disk drive characterized by being urged.