JPS6313269B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disk drive device.

In recent years, with the spread of disk drive devices, improvements have been made actively, but making them thinner is a major issue. In this regard, when looking at disk drive devices, a drive hub and a cone grip and rotate a magnetic disk, and an increasing number of disk drive devices have a drive hub directly connected to a DC motor. Even with this method, the thickness of the device is limited to a minimum by the thickness occupied by the directly coupled DC motor and drive hub, and the stroke of the cone relative to this drive hub. As the thickness of the displacing mechanism is added, in the end,
Although various methods have been adopted in the past, they are all insufficient in terms of making the device thinner.

The present invention has been made in view of the above points, and an object of the present invention is to obtain a disk drive device that can improve operability when the device is made thinner without causing any functional problems. .

The present invention includes a drive hub for rotating a disk;
It has a cone that faces the drive hub and an action part that presses the cone against the drive hub, one end of which is rotatably supported on the opposite side of the disk insertion port of the device, and the other end of which is rotatably supported on the opposite side of the disk insertion port of the device. A cone lift arm extending to the side, a lid rotatably provided at the disk insertion port, and the other end of the cone lift arm extending toward the disk insertion port engaging the lid. the cone lift arm is configured to rotationally displace the cone lift arm when the lid is opened and closed, and to press the cone against the drive hub when the lid is closed; The stroke range of the cone lift arm is moved toward the drive hub by forming the other end of the cone lift arm at a position closer to the drive hub than on a straight line connecting one end of the arm and the acting part. This invention provides a disk drive device that can be made extremely thin and that does not impair operability even if the device is made thin.

An embodiment of the present invention will be described based on the drawings.
First, to explain the basic configuration, a DC motor 2 is attached to the center back side of the main body 1.
A drive hub 4 is directly connected to the motor 2 via a shaft 3. A cone 5 faces the drive hub 4, and a magnetic disk 6 inserted from a disk insertion port, that is, a media insertion port (not shown), is gripped by the drive hub 4 and the cone 5 and rotated. It is set to do so. As is well known, the magnetic disk 6 consists of a square jacket and a thin flexible disk rotatably disposed within the jacket, with a central hole for gripping formed in the center. At the rear, a magnetic head 7 is mounted on a carriage 8 and is set to be gripped and set to perform reading and recording operations on a rotating magnetic disk 6, and is set to move forward and backward in the radial direction by a guide shaft 9. Reference numeral 10 denotes a step motor for moving this carriage 8, and is connected by a predetermined steel belt 11. Further, reference numeral 12 denotes a head drive mechanism for moving the magnetic head 7 toward and away from the magnetic disk 6.

Therefore, the leaf spring 13 supporting the cone 5
is provided. This leaf spring 13 has a length that spans almost the entire width of the main body 1, is supported at both ends by a boss 14 formed on the main body 1, and can be freely displaced only in the direction toward and away from the drive hub 4. .
This shape has a flat part 15 located at the center when viewed from the front, parallel to the drive hub 4 and cone 5, and slightly elevated, and sloped parts 16 that become lower from the flat part 15 toward both ends. And the cone 5
is attached to the lower central surface of the flat portion 15.

A cone lift arm 17 is then provided which presses the leaf spring 13 to displace the cone 5 toward the drive hub 4. The cone lift arm 17 has a base 18 which is adjacent to the back of the leaf spring 13 and has approximately the same height as the flat part 15 thereof, and both ends of the cone lift arm 17 extend slightly to the rear and are opposite to the media insertion opening of the main body 1. The leaf spring 2
0. It is rotatably supported in the vertical direction via a screw 21. This cone lift arm 17 is formed by press processing, and has bent pieces 22 on both sides that are bent from near the end of the leaf spring 13 and extend through both sides of the main body 1 toward the media insertion opening. . A groove portion 23 serving as an engaging portion is formed at the tip of this bent piece 22. Further, at the base 18 of the cone lift arm 17, there is provided a 2-piece which protrudes above the leaf spring 13, bends downward, and comes into contact with the leaf spring 13.
Load protrusions 24 are formed as two acting parts. The position of the load protrusion 24 is symmetrical with respect to the cone 5, which is the slope portion 16 of the leaf spring 13, and is at the center of the leaf spring 13 when viewed in the width direction.

In addition, a cover 25 in which a media insertion port is formed is provided on the front side of the main body 1, and a door 26 serves as a lid for opening and closing the media insertion port.
is provided. A curved arm 27 is fixed near both ends of the door 26, and a hole 29 is formed at the lower end of the arm 27 to engage with a stud 28 provided on the main body 1, so that it can rotate freely. It is said that A pin 30 is provided in the middle of the arm 27 and is set to engage with the groove 23 of the cone lift arm 17 via a grooved collar 31. Also, door 26
A pin 32 is provided at the center of the inner surface. Next, a latch 33 for latching the door 26 in the closed state via this pin 32 is provided near the media insertion opening. This latch 33 opens and closes the door 26 in a so-called one-way manner, and as shown in FIG.
, an inner circumferential surface 38 formed by a curved outer circumferential surface 36 that is pushed and displaced by the movement of the pin 32 due to the closing operation of the door 26 and a groove 37 formed between the hole 35 and the outer circumferential surface 36; A sliding circumferential curved surface 40 that includes a latch portion 39 formed at the center of the surface 38 to stabilize the pin 32 and goes around the same plane, and the groove 37 prevents direct communication between the inner circumferential surface 38 before and after the latch portion 39. It consists of a pin regulating part 41 that projects toward the latch part 39 at different levels, and a spring locking part 43 that is formed at the rear end and locks one end of a spring 42. Further, another stud 44 is erected near the stud 34, and an arm 45 is rotatably provided on this stud 44, and together with a magnet 46, a locking member 47 is constituted. That is, a hook portion 48 to which the other end of the spring 42 is locked is formed at one end of this arm 45, and a concave force transmitting portion 49 is formed approximately in the center, and a pin 51 provided on the plunger 50 of the magnet 46 is provided.
is locked. Here, the magnet 46 is turned ON to perform a suction operation in response to reading and writing operations by the magnetic head 7, and the plunger 50 is provided with an E-ring 52. Note that 53 is a stopper for the arm 45.

An eject mechanism is provided on the front side of the step motor 10. This eject mechanism is mainly composed of an eject plate 55 and a spring 56 that can be slid forward and backward along a guide portion 54 formed on the main body 1, and this spring 56 is connected to a stud formed on the front side of the main body 1. 57 and a locking piece 58 bent upward in front of the eject plate 55. That is, when viewed from the side, the spring 56 is stretched diagonally so that the locking piece 58 side is higher. Further, a bent piece 59 is formed at the tip of the eject plate 55 to be bent downward and to which the jacket of the magnetic disk 6 is engaged. At a predetermined position of the guide part 54, there is a stepped part 6 for latching the end surface 60 of the eject plate 55.
1 is formed. Further, an eject plate 5 is provided at the base 18 of the cone lift arm 17.
A tongue piece 62 is formed on the eject plate 55 and protrudes toward the front side, and a leaf spring 6 is formed on the eject plate 55 and faces the tongue piece 62 near the locking piece 58.
3 is fixed. As shown in FIG. 5, this leaf spring 63 has an opening 64 and a bent piece 65 formed therein. Further, an eject prevention piece 66 bent upward is provided at a predetermined position of the eject plate 55.
is formed. This ejection prevention piece 66 is movable on the lower surface of the cone lift arm 17 in the normal state, but when the cone lift arm 17 is rotated, the ejection prevention piece 66
Its height and position are set so that it is locked to the rear end surface of the holder 8. Further, an escape hole 67 is formed in a part of the base 18 in correspondence with the position of the ejection prevention piece 66 of the eject plate 55 in the non-operating state.

In this configuration, basically, the magnetic disk 6 is inserted and set in a predetermined position, and the door 26 is closed, so that the magnetic disk 6 is gripped and set between the drive hub 4 and the cone 5. First, when the magnetic disk 6 is inserted in the state shown in FIG. As shown in FIG. 6b, the end face 60 falls into the stepped portion 61 and is latched, completing the insertion and setting of the magnetic disk 6.
The end face 60 is lowered into the stepped portion 61 by the force of the diagonally tensioned spring 56.
In this insertion and setting operation, the leaf spring 63 provided on the eject plate 55 comes into contact with the tongue piece 62, as shown in FIG.
It will bend in the opposite direction to the sliding direction. Due to the deflection of this leaf spring 63, the eject plate 5
A downward force is generated against the eject plate 55 to ensure that the eject plate 55 latches onto the stepped portion 61. Therefore, the eject plate 55 can be latched without the force of the spring 56.

After the magnetic disk 6 is inserted and set, the door 26 is closed as shown in FIGS. 3a to 3b. Incidentally, the dashed line in FIG. 3 indicates the magnetic disk surface. By closing this door 26, the pin 3
0 also rotates downward around the stud 28, so the cone lift arm 17, which has the groove 23 at its tip that is engaged with the pin 30, moves downward around the leaf spring 20 in conjunction with the door 26. It will move. As the cone lift arm 17 descends, the leaf spring 13 is pressed and displaced downward, causing the cone 5 to descend and grip the magnetic disk 6. In this case, it is convenient because the door 26 can be used as a member with a large stroke. In other words, when the DC motor 2 is used, the thickness of the motor itself is larger than that of a belt-driven one, so assuming that the thickness of the entire device is the same, the movable range of the cone lift arm 17 is small and the stroke is small. This is because it is difficult to set a large one. Further, since the movement of the door 26 is transmitted to the cone lift arm 17, only a small operating force is required, and the interlocking mechanism for this purpose is simple and consists of the groove 23 and the pin 30. Furthermore, it is convenient that the door 26 also serves as an operating section for the cone lift arm 17.

By the way, regarding the operation of the leaf spring 13 due to the downward pressure of the cone lift arm 17, this leaf spring 1
3 is supported at both ends so as not to move or twist in the lateral direction, and the 2
Since the cone 5 is deformed by receiving the load from the two load protrusions 24, the cone 5 attached to the flat portion 15 descends toward the drive hub 4 while remaining in a parallel state. Therefore, since the cone 5 does not descend obliquely, the periphery of the central hole will not be damaged when the magnetic disk 6 is gripped. This figure 4b
In the gripping state shown in FIG.
Since the gripping pressure, for example 2 kg, is exerted by the elastic force of the cone 3 itself, it is not necessary to provide a coil spring at the axial center of the cone 5. In addition, since the load point on the leaf spring 13 utilizes the inclined surface 16, there is no need to make the cone lift arm 17 higher than the leaf spring 13 as shown in FIG. It's advantageous.

On the other hand, in the lowering movement of the cone lift arm 17, the tongue piece 62 slides on the leaf spring 63 and escapes into the opening 64 of the leaf spring 63 and descends, so that the leaf spring 63 returns to the vertical state. Also, in the state shown in FIG. 6c, the cone lift arm 17
The base portion 18 and the ejection prevention piece 66 are engaged in the ejection prevention direction. Therefore,
Even if the eject plate 55 comes off from the stepped portion 61 due to some kind of impact or the like when the magnetic disk 6 is inserted and the door 26 is closed, the eject prevention piece formed on the eject plate 55 66 is locked to the base 18, the eject plate 55 does not perform an eject operation. That is, the bent piece 59
This prevents unnecessary force from being applied to the jacket of the magnetic disk 6, thereby preventing damage caused by frictional contact between the rotating disk and its jacket, thereby protecting the magnetic disk 6. Regarding this ejection prevention piece 66, see Fig. 6a.
As shown in FIG. 2, when the door 26 is closed without the magnetic disk 6 inserted, there is no problem since the escape hole 67 is formed at a position opposite to the cone lift arm 17. On the other hand, magnetic disk 6
If the door 26 is closed due to incomplete insertion, the cone lift arm 17 will come into contact with the top of the ejection prevention piece 66 and will not be able to be set.

After the read/write operation, by opening the door 26, the cone lift arm 1
7 returns to its original position, the leaf spring 13 also returns to its original position, and the grip on the magnetic disk 6 is released. At the same time, the eject plate 55 also comes off the stepped portion 61 and is pulled in the ejecting direction by the spring 56, so that the magnetic disk 6 is ejected via the bending piece 59. That is, since the tongue piece 62 of the cone lift arm 17 rises from the state shown in FIG. Step 61 of eject plate 55
Lifting (unlatching) is performed stably, and the ejecting operation begins.

By the way, the latching operation of the door 26, that is, the one-way opening/closing operation of the door 26 will be explained. First, FIG. 7 shows the state when the door 26 begins to close and the pin 32 contacts the outer peripheral surface 36 of the latch 33. When the door 26 is pushed further, the pin 32 pushes the latch 33, but this latch 33 cannot escape backwards (downward in Figure 7) due to the stud 34, so the outer circumferential surface 36 remains in contact with the pin 32.
It will rotate as shown in Figure a. and,
When the door 26 is further pushed, the latch 33 rotates and the pin 32 is disengaged from the outer circumferential surface 36 and inserted into the groove 37 by the force of the spring 42. When the door 26 is pushed as far as it will go, the pin 32 hits the pin regulating piece 42. Therefore, the pin 32 that has entered the groove 37 does not overrun the latch 39, and when the door 26 is released, the pin 32 is latched to the latch 39 and stopped as shown in FIG. 9b. Become. The state shown in FIG. 9b is the latched closed state of the door 26. At this time, the spring 42 is located to the left (FIG. 9) of the straight line connecting the stud 34 and the spring locking portion 43, and applies a clockwise urging force to the latch 33. If the door 26 is pushed again in this latched state, the pin 32 will also move and come off the latch part 39 onto the pin regulating part 41.
When the latch is released, the pin 32 returns to its original position through the inner circumferential surface 38 under the biasing force of the spring 42, as shown in FIG. 9c, and the door 26 is opened. In this way, the door 26 can be opened and closed in a one-way manner with extremely high operability, and the structure thereof is simple and inexpensive. That is, the latch 33 can be a two-dimensional structure formed in the same plane like the sliding circumferential curved surface 40.

On the other hand, even in the latched state as shown in FIG. 9b, the state in which the magnetic head 7 is in read/write operation is shown in FIG. 10, for example. At this time, the magnet 46 is energized and the plunger 50 is attracted, so the arm 45 also rotates counterclockwise (Fig. 10) around the stud 44 due to the locking of the pin 51 and the force transmitting part 49. The hook portion 48 is displaced to the right. Therefore, with respect to the straight line connecting the stud 34 and the spring locking part 43, the hook part 48 (therefore, the spring 42) is the same or on the right side, and the spring 42
The biasing force applied to the latch 33 is switched counterclockwise. In this condition, door 2
6, the pin 32 only comes off the latch part 39 and the latch 33 does not rotate, and when the door 26 is released, the pin 32 is latched to the latch part 39 again. Therefore, even if a one-way system is adopted, the door 26 can be locked by locking with the locking member 47 during read/write operations.
This means that troubles such as inadvertently being opened will not occur.

Therefore, let's consider how to make the entire device thinner. First, as in this embodiment, the DC motor 2
When using, as shown in FIG. 4a, the thickness between the DC motor 2 and the drive hub 4 and the stroke of the cone 5 with respect to the drive hub 4 are required to be the minimum,
The question is how much other thicknesses should be added to this. That is, this is because the thickness of this portion is the thickest and the thickness of the device is regulated. In this respect, first, the cone 5 is attached to the flat part 15 of the leaf spring 13, and the support part of this leaf spring 13 is attached to the inclined part 16.
Since the plate spring 13 is lower than the flat portion 15, the thickness of the plate spring 13 does not increase as much. The cone lift arm 17 that presses the leaf spring 13 uses its load protrusion 24 to press the sloped part 16, so its base 18 is pressed against the flat part 1.
5, and this cone lift arm 17 does not particularly increase the thickness. Here, the cone lift arm 17 is advantageous in that it is made thinner by press working, and since the strength of the cone lift arm 17 is ensured by the bent piece 22 bent downward, there is no problem in operation. do not have. On the other hand, this cone lift arm 1
If the movable range of the cone lift arm 17 is large, the thickness of the device will increase, but the stroke of the cone lift arm 17 itself should be small, and the door 2 with a large stroke should be
6 and by this interlocking, the cone lift arm 1
7 is working, so there is no problem. Furthermore, the latch 33 for latching the door 26 can have a two-dimensional structure in the thickness direction, which is also advantageous.

As described above, the present invention includes a drive hub that rotates a disk, a cone that faces the drive hub, and an action section that presses the cone against the drive hub,
A cone lift arm whose one end is rotatably supported on the opposite side of the disk insertion opening of the device and whose other end extends toward the disk insertion opening, and a lid rotatably provided at the disk insertion opening. and an engaging means for engaging the other end of the cone lift arm extending toward the disk insertion port side with the lid, the cone lift arm being rotationally displaced by opening and closing of the lid. and the cone lift is located at a position closer to the drive hub than on a straight line connecting one end of the cone lift arm and the action section. By forming the other end of the arm, the stroke range of the cone lift arm is moved toward the drive hub, so the thickness of the cone side of the device can be reduced, which is extremely effective in making the device thinner. It is possible to realize a disk drive device which can be realized in a manner similar to that of the previous embodiment and which does not impair operability.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an overall plan view, FIG. 2 is a perspective view of the cone lift arm and door, and FIGS. 3 a and 3 are side views showing the interlocking relationship thereof. Figures 4a and 4b are front views showing the gripping operation, Figure 5 is a perspective view of the eject plate, Figures 6 a to c are side views showing the operation of the eject mechanism, and Figure 7 is a bottom view of the door latch mechanism. 8 is a perspective view of the latch, FIGS. 9a to 9c are bottom views showing the latching operation, and FIG. 10 is a bottom view showing the locked state. 1... Main body, 4... Drive hub, 5... Cone,
6... Magnetic disk, 13... Leaf spring, 17...
Cone lift arm, 23... groove portion (engaging portion),
26...Door.

Claims (1)

[Claims] 1 It has a drive hub that rotates the disk, a cone that faces the drive hub, and an action part that presses the cone against the drive hub, and one end is rotatably supported on the opposite side of the disk insertion opening of the device. a cone lift arm whose other end extends toward the disk insertion port; a lid rotatably provided at the disk insertion port; and the other end of the cone lift arm which extends toward the disk insertion port. and an engaging means for engaging the lid and the lid, the cone lift arm is rotationally displaced when the lid is opened and closed, and the cone is attached to the drive hub when the lid is closed. By forming the other end of the cone lift arm at a position closer to the drive hub than on a straight line connecting one end of the cone lift arm and the acting part, the stroke of the cone lift arm can be controlled. A disk drive device characterized in that the range is moved toward the drive hub side.