KR900007499Y1 - Disk supporting apparatus - Google Patents

Abstract

No content.

Description

Disc support

1 to 8 show an embodiment of the present invention, Figure 1 is a perspective view showing a disk support device according to the present invention including a partial cross-section.

2 is an exploded perspective view of the disk support device.

3 is a plan view of the leaf spring.

4 and 6 are cross-sectional views showing the deformation state of the arm portion of the leaf spring in each direction.

5 is an imaginary side view showing a deformation state of a conventional leaf spring for comparison with FIG.

7 is a plan view showing a case where a hub is loaded on a turn table and not in a normal state.

8 is an enlarged perspective view showing the state of the positioning pin and the driving hole in the case of FIG.

9 to 15 show a prior art, and FIG. 9 is a perspective view showing a conventional disc support device with a partial cross section.

10 is an exploded perspective view of a conventional disk support apparatus.

11 is a plan view showing a state in which the hub is loaded on the turntable.

12 is a side view of FIG.

13 is for explaining the problem of the present invention, a plan view showing a case where the hub on the turntable is not loaded as a normal state.

14 is a side view of FIG.

FIG. 15 is an enlarged perspective view showing the state of the positioning pin and the driving hole of the hub in FIG.

* Explanation of symbols for main parts of the drawings

6: floppy disk 7: hub

8: support hole 9: drive hole

11: rotating drive shaft 12: turntable

13: leaf spring 13C: arm of leaf spring

A: part extended in the direction away from a rotation drive shaft among arm parts

B: part extended in the direction surrounding the rotary drive shaft among arm parts

14: positioning pin

The present invention relates to a disk support apparatus for positioning and driving a small disk such as a 3.5-inch floppy disk, and more particularly, to a disk support apparatus capable of always accurately positioning the hub in the center of the disk.

9 and 10 show a disk support device installed in a conventional 3.5-inch floppy disk drive unit.

Reference numeral 1 in the drawings denotes a rotation drive shaft.

This rotation drive shaft 1 is rotationally driven by a brushless motor which rotates at constant speed. At the upper end 1a of the rotation drive shaft 1, a circular turn table 2 is installed. In addition, the upper end 1a of the rotation drive shaft 1 protrudes upward from the center of the turn table 2. The through table 2a and the female screw hole 2b are formed in the turn table 2. The through-hole 2a and the female screw hole 2b are provided in the symmetrical position centering on the rotation drive shaft 1. The leaf spring 3 is provided in the lower surface of the turn table 2.

The notch part 3a is formed in the center of this leaf spring 3, and the fixing hole 3b is laid in the edge of the leaf spring 3. As shown in FIG. Moreover, the positioning piece 4 is installed in the front-end | tip of the leaf spring 3. As shown in FIG. The rotary drive shaft 1 is inserted into the cutout 3a of the leaf spring 3. The fixing screw 5 is inserted into the fixing hole 3b and screwed to the female thread hole 2b so that the base of the leaf spring 3 is fixed to the lower surface of the turn table 2. The positioning pin 4 protrudes above the turn table 2 from the through hole 2a.

The conventional leaf spring 3 is deformed by the elastic force of one arm portion 3c extending in parallel to both sides of the cutout portion 3a, whereby the positioning pin 4 is turned by the turntable 2. It protrudes on the upper surface of the head and is to retreat.

11 and 12 show a state in which a cartridge of a 3.5-inch floppy disk is loaded in the disk support device.

Reference numeral 6 denotes a floppy disk in the disc cartridge, and reference numeral 7 denotes a hub fixed to the center of the floppy disk 6. The support hole 8 is laid in the center of the hub 7, and the drive hole 8 is laid in the position away from this, and the drive hole 9 is laid in the position away from this. . The drive hole 9 extends in the normal direction with respect to the center of rotation of the hub 7 to have a rectangular shape.

As shown in FIG. 11, when the hub 7 is installed on the turn table 2, and the positioning pin 4 is in the position of (a), the arm portion 3c of the leaf spring 3 ) Is bent so that the positioning pin 4 retreats from the upper surface of the disk 2. When the turntable 2 is driven as a motor, and the positioning pin 4 is drawn into the drive hole 9, for example, when the position of (b) is reached, the positioning pin ( 4) protrudes from the upper surface of the turn table 2 and is drawn into the drive hole 9. When the turntable 2 rotates, the outer surface 4a of the positioning pin 4 abuts on the outer side 9a of the drive hole 9.

At this time, the arm portion 3c of the leaf spring 3 is slightly bent so that the outer surface 4a of the positioning pin 4 presses the outer side 9a of the drive hole 9 in the radial direction, whereby the hub ( 7) becomes the radial positioning with the turntable 2, and the center of rotation of both coincides. Moreover, when the turntable 2 rotates, it abuts on the side edge 9b of the horizontal surface 4b of the positioning pin 4, and positioning of the hub 7 and the turntable 2 in the rotational direction is performed.

In the floppy disk, in the composition unit, the rotor position of the motor for driving the rotation drive shaft 1 is detected by a pulse generator or the like, and the potential phase of the positioning pin 4 is detected. As described above, since the hub 7 is positioned in the radial direction and the rotational direction with respect to the turntable 2, the initial position of the recording and reproduction is set correctly by recording the index signal lamp in response to the phase detection. do. This ensures the accuracy of recording and reproducing of the disc, disc compatibility, and the like.

As described above, in this type of floppy disk drive unit, in the disk support apparatus, as shown in FIG. 11, the turntable 2 is rotated so that the positioning pin 4 is moved to the position of (c) at the position of (b). It is comprised so that positioning of the hub 7 and the turntable 2 may be performed assuming moving to a position.

However, as an actual condition for using the floppy disk drive unit, recording or reproduction is performed while the disk is being driven, that is, with the positioning pin 4 at the position of (c) and the hub 7 positioned. The operation is stopped and the rotation of the rotation drive shaft 1 may stop.

At this time, if the disc cartridge is taken out during the next recording and reproducing operation, and immediately after that, the same cartridge is loaded as it is and the recording and reproducing operation is continued, the hub 7 starts to be driven without being accurately positioned. There is a phenomenon. That is, in FIG. 11, in the state where the positioning pin 4 is in the position of (c), the arm part 3c of the leaf spring 3 is bent slightly, and the positioning pin 4 is a drive hole 9 ), The outer side 9a of) is pressed. Therefore, when the disc cartridge is taken out at this time, the positioning pin 4 is slightly moved radially outward by the return force of the leaf spring 3. In this case, if the same cartridge is loaded again immediately after this, as shown in FIG. 13, the positioning pin 4 is not changed at the position of (c) as during driving, but the outer surface 4a of the pin is not changed. The outer side 9a of the drive hole 9 slightly escapes outward. Therefore, the positioning pin 4 is pressed against the hub 7 from the upper surface and retreats downward from the upper surface of the turn table 2 (see FIG. 14).

When paying attention to the deformation of the leaf spring 3 at this time, when the positioning pin 4 is pushed upward, the arm portions 3c on both sides of the leaf spring 3 are bent evenly in the plate direction and twisted direction. As it does not bend much.

That is, when the positioning pin 4 is pressed downward from the hub 7, the leaf spring 3 is simply bent downward as shown in Fig. 14, the positioning pin 4 is the leaf spring It is unilaterally hardnessed in the radial direction by an angle α equal to the bending angle of (3).

As a result, as shown in FIG. 15, the inner peripheral part 4c of the positioning pin 4 draws in into the drive hole 9. As shown in FIG. In this state, when the power is turned on and the turntable 2 starts to rotate, the inner peripheral portion 4c of the positioning pin 4 presses the lateral side 9b of the driving hole 9 as shown in FIG. 7) is driven. In other words, the hub 7 is driven without being accurately positioned with respect to the turntable 2.

For this reason, an error occurs in the tracking of the floppy disk 6 by the magnetic head, which causes trouble in the recording and reproducing operation.

The present invention is to solve the above-described problems, even if the disk cartridge is ejected as the hub is positioned on the turntable, and the condition is reloaded as it is, the hub immediately after rotation It is to provide a disk support device that is accurately positioned relative to the turn table so that tracking defects and the like do not occur.

According to the present invention, the turntable is installed on the rotation drive shaft, the tip of the rotation drive shaft is protruded from the upper surface of the turntable, and the positioning pin is installed on the leaf spring provided on the lower surface of the turntable. A disk support device in which a crystal pin protrudes from an upper surface of a turn table, wherein the leaf spring extends in a direction away from the rotation drive shaft, and further extends the rotation drive shaft in an enclosing direction, and at the same time an end portion of which is free. Is formed, and the said positioning pin is located in the part extended in the direction which surrounds the rotation drive shaft of this arm part.

In the present invention, when the positioning pin is pressed by the hub in the center of the disk, the positioning pin is not stiffened in the radial direction only by the shape of the arm of the leaf spring. Hardness and hardness in the synthesized direction. Therefore, the disc drive is stopped, the disc is taken out, the disc is reloaded in the same state immediately thereafter, and the positioning pin is inclined in a direction where the main part is hard to catch the drive hole of the hub even when the disc is in the state shown in FIG. Thus, the hub is prevented from being driven to rotate without being positioned on the turntable.

[Example of Design]

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 8.

1 is a perspective view including a partial cross-sectional view showing an assembled state of the disk support device according to the present invention, Figure 2 is an exploded perspective view thereof.

As shown in FIG. 9 and FIG. 10, the turntable 12 is installed in the front end of the rotation drive shaft 11 driven as a brushless motor which rotates at constant speed, and the front end 11a of this rotation drive shaft 11 is shown. It protrudes upwards from the center of this turn table 12. Further, the through table 12a and the female screw hole 12b are formed in the turn table 12.

The leaf spring 13 is attached to one of the turn tables 12. As shown in FIG. 2 and FIG. 3 (plan view), the leaf spring 13 is provided with the notch 13a at the center part, and the rotary drive shaft 11 is inserted into this notch 13a. A fixing hole 13b is laid at the base end of the leaf spring 13, and a fixing screw 15 inserted into the fixing hole 13b is screwed to the female thread hole 12b of the turn table 12, so that the leaf spring ( 13) is fixed.

The arm part 13c is formed in the front-end | tip of the plate sprier 13. As shown in FIG. This arm portion 13c has a substantially C shape, extends from the inside of the turntable 12 in the peripheral portion direction (direction separated from the drive shaft 11), and the rotary drive shaft 11 in succession at this tip. It is from the B part extended in the surrounding direction. The tip of this part B is the free end 13d.

And the positioning pin 14 is being fixed to the B part of this arm part 13c.

When the leaf spring 13 is fixed to the lower surface of the turn table 12, the positioning pin 14 protrudes upward from the through hole 12a of the turn table 12.

As shown in FIG. 3, the fixing part (fixed hole 13b) by the positioning pin 14 and the fixing screw 15 is arrange | positioned at the symmetrical position with respect to the rotation drive shaft 11. As shown in FIG.

The hub 7 loaded onto the turn table 12 is the same as that shown in FIG. 11, and the support hole 8 is laid in the center, and the rectangular drive hole 9 is located at a position separated from this. This is the snowfall (see Figure 7).

Next, the driving operation will be described.

Usually, when the hub 7 is provided on the turn table 12 and the turn table 12 starts to rotate, the positioning pin 14 is moved from the position of (a) shown in FIG. 11 to (b). It reaches the position of and enters into the drive hole 9 of the hub 7. Thus, when the positioning pin 14 reaches the position of (c), the positioning pin 14 is slightly bent and pressed radially outward by the leaf spring 13. Therefore, the outer surface of the positioning pin 14 is pressed against the outer wall 9a of the drive hole 9, whereby the radial position of the hub 7 is determined, thereby turning the table 12 and the hub 7. The center of rotation of coincides.

In addition, positioning of the hub 7 in the rotational direction is performed by causing the transverse surface of the positioning pin 14 to abut the transverse side 9b of the driving hole 9.

By the way, in the actual use condition, when the positioning pin 14 is positioned in the normal state in which the positioning pin 14 is at the position of (c) of FIG. 1, the rotation of the turntable 12 is stopped and in this state. The disc cartridge is taken out.

At this time, as shown in FIG. 7 (orientation in FIG. 13), the positioning pin 14 moves radially outward by the return of the slightly bent leaf spring 13.

Therefore, when the same disk cartridge is loaded again immediately afterwards, the positioning pin 14 moves the outer surface 14a portion outward from the driving hole 9 to press the lower surface of the hub 7 to penetrate the turntable 12. Regress into the ball 12a.

Here, as shown in FIG. 3, since the arm part 13c of the leaf spring 13 is substantially C shape which becomes A part and B part, when the positioning pin 14 presses upwards, the arm part 13c is pressed. At first, the portion A is bent by the angle β (see Fig. 4) at the position of the curved point (a) or at the vicinity thereof, and at the same time the angle γ (figure 6) is at the position of the curved point (I). Bend). Therefore, the positioning pin 14 is inclined in the bending direction of the A and B portions of the arm portion 13c, that is, the synthesized direction of the bending angles β and γ.

Therefore, when the positioning pin 14 is depressed by a certain distance l (see Fig. 4), the warpage of the A part is synthesized, so that the bending angle β of the A part at this time is the conventional plate shown in Fig. 10. The spring 3 is smaller than the bending angle in the same direction as in the case where the positioning pins are depressed by the same distance l.

That is, in the case of the conventional leaf spring 3, since one parallel arm portion 3c is bent evenly downward, the positioning pin 4 is unilaterally stiffened only in the radial direction. As shown in the conventional comparator), the hardness angle α of the positioning pin 4 (ie the bending angle of the leaf spring 3) is the radial direction of the positioning pin 4 by the leaf spring 13 of the present invention. It becomes larger than the hardness angle β to. Conversely, in the present invention, the hardness angle β in the radial direction when the positioning pin 14 is retreated downward by ℓ is less than the hardness angle α in the same direction in the case of the conventional leaf spring 3. Lose.

In this way, the radial angle β in the radial direction when the positioning pin 14 is pressed down by the hub 7 is reduced, and as shown in FIG. 6, the positioning pin 14 is turned table ( 12, which is inclined by the angle γ in the reverse direction, the positioning pin 14 at the position of (c), i.e., the driving hole 9 of the hub 7, as shown in FIG. When the positioning pin 14 slightly deviates outwardly from the normal driving position of the pressing force by the hub 7, the outer circumferential portion 14a of the positioning pin 14 enters into the driving hole 9 and the angle thereof. Becomes very small (see Figure 8).

Therefore, even if the turntable 12 starts to rotate afterwards, the outer periphery 14a of the positioning pin 14 is not caught by the transverse side 9b of the drive hole 9, and the B portion of the arm 13c is θ. Bend in the direction (see FIG. 6), only the turntable 12 rotates without the hub 7 rotating.

Therefore, when the turn table 12 is rotated once, the positioning pins 14 reach from the position of (a) to the position of (b) in the same manner as described in FIG. 11 and completely enter into the driving hole 9. After that, it is brought to the position (c) so that the hub 7 is completely positioned with respect to the turntable 12. Thus, as the positioned state, the hub 7 and the floppy disk 6 are driven to rotate.

According to the present invention as described above, when the positioning pin is pressed by the hub by installing the arm on the leaf spring and fixing the positioning pin to the portion extending in the direction surrounding the rotary drive shaft in the arm. The microcrystalline pin is hardened not only in the radial direction but also in the rotational direction.

Therefore, even when the disc is ejected while the recording / reproducing operation is paused and the same disc is loaded immediately thereafter, the defect that the hub is driven without positioning can be eliminated.

Claims (1)

At the same time as the turntable 12 is laid on the rotary drive shaft 11, the tip of the rotary drive shaft protrudes from the upper surface of the turntable, and the positioning pin is placed on the leaf spring 13 which is provided to the lower surface of the turntable. (14) is laid, and this positioning pin is a disk support device which protrudes from the upper surface of a turntable, WHEREIN: The said leaf spring (13) extends in the direction separated from the rotation drive shaft (11), and further includes a rotation drive shaft ( And an arm portion 13c extending in the direction surrounding the 11 and having a free end 13d at the same time, and extending in the direction surrounding the rotational drive shaft of the arm portion. A disk support device, characterized in that 14).