JPH0222853Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a floppy disk drive device.

Generally, a floppy disk drive device is provided with an eject plate for ejecting an inserted magnetic disk after use. In other words, the eject plate, which is biased in the eject direction, is displaced to the rear as the magnetic disk is inserted and latched at a predetermined position, so that no eject force is applied to the magnetic disk during use, and after use, the eject plate By releasing the latch, the magnetic disk is pushed out toward the media insertion slot by the returning operation of the eject plate. Therefore,
Conventionally, various means have been used to releasably latch the eject plate. However, this means is complicated due to the large number of parts, and its operation is unstable and lacks reliability when releasing the latch.

This invention was devised in view of the above points, and the object is to provide a floppy disk drive device that has a small number of parts and can easily and reliably latch and release the eject plate. It is something.

This idea involves providing a predetermined deformable plate material on the eject plate, and deforming it in the opposite direction by pushing it with a tongue piece formed on the cone road member when the magnetic disk is inserted, and this deformation generates a downward force to eject the magnetic disk. The plate is latched securely, and when the cone load member is operated, the tongue piece is released downward to wait, and when the cone load member returns, the tongue piece lifts up this deformed plate material from below to ensure that the latch is released. For this purpose, the structure is such that only a deformable plate material and a tongue piece are required.

An embodiment of this 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, and a drive hub 4 is directly connected to the DC motor 2 via a shaft 3. A cone 5 faces the drive hub 4, and a media insertion slot (not shown) is provided.
The drive hub 4 and the cone 5 grip and rotate the magnetic disk 6 inserted therein. 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 move forward and backward in the radial direction by a guide shaft 9. The magnetic head 7 performs reading and recording operations on the rotating magnetic disk 6 while being gripped. Reference numeral 10 denotes a step motor for moving this carriage 8, which is connected by a predetermined steel belt 11. Further, 12 is 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. .
Its shape includes 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.

Next, a cone lift arm 17 is provided which serves as a cone load member that presses the leaf spring 13 and displaces the cone 5 toward the drive hub 4. This 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 connected to the support part 19 of the main body 1. It is rotatably supported in the vertical direction via a leaf spring 20 and 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 is formed at the tip of this bent piece 22. Furthermore, two load protrusions 24 are formed on the base 18 of the cone lift arm 17, projecting above the leaf spring 13, bent downward, and contacting the leaf spring 13. The position of this load protrusion 24 is
3 is at a symmetrical position with respect to the cone 5, and is at the center of the leaf spring 13 when viewed in the width direction.

Further, 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 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 stud 2 provided on the main body 1 is attached to the lower end of the arm 27.
A hole 29 is formed to engage with the hole 8 so that it can rotate freely. In the middle of the arm 27 is a pin 30.
is provided and is configured to engage the groove 23 of the cone lift arm 17 via a grooved collar 31. Further, a pin 32 is provided at the center of the inner surface of the door 26. 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.
A curved outer peripheral surface 36 and a hole 35 which are pushed and displaced by the movement of the pin 32 due to the closing operation of the door 26.
An inner circumferential surface 38 formed by a groove 37 formed between the outer circumferential surfaces 36, and a sliding contact that goes around the same plane, including a latch portion 39 formed at the center of the inner circumferential surface 38 to stabilize the pin 32. a circumferential curved surface 40; a pin restricting portion 41 that protrudes at different levels toward the latch portion 39 to prevent direct communication between the inner peripheral surface 38 before and after the latch portion 39 in the groove 37; It consists of a spring locking part 43 that is locked at one end. Further, another stud 44 is erected near the stud 34, and an arm 45 is rotatably provided on this stud 44, and a magnet 46 is attached to the arm 45.
A locking member 47 is constituted by the above. That is, a hook portion 48 to which the other end of the spring 42 is locked is formed at one end of the arm 45, and a concave force transmitting portion 49 is provided approximately in the center of the arm 45, and a magnet 46
A pin 51 provided on the plunger 50 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 equipped with an E-ring 5.
2 is provided. 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. The spring 56 is attached 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, which is bent downward and serves as an abutment portion on which the jacket of the magnetic disk 6 is engaged. A stepped portion 61 is formed at a predetermined position of the guide portion 54 to latch an end surface 60 of the eject plate 55. Furthermore, a tongue piece 62 is formed on the base 18 of the cone lift arm 17 and is positioned on the eject plate 55 and protrudes toward the front side.
A thin leaf spring 63, which is a deformable plate material, is fixed on the tongue 5 near the locking piece 58 and facing the tongue piece 62. As shown in FIG. 5, this leaf spring 63 is formed with an opening 64 as an opening and a bent piece 65 as a release part. Furthermore, an ejection prevention piece 66 bent upward is formed at a predetermined position on the ejection plate 55. This ejection prevention piece 66 is movable on its lower surface with respect to the cone lift arm 17 in the normal state, but when the cone lift arm 17 is rotated, the ejection prevention piece 66 is raised so that it locks on the rear end surface of the base 18. The height and position are set. 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 and bends in the opposite direction to the sliding direction of the eject plate 55, as shown in FIG. 6b. Become. This deflection of the leaf spring 63 generates a downward force on the eject plate 55, and the eject plate 55 is reliably latched onto the stepped portion 61. Therefore, eject plate 5
5 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. Note that 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 to lower the cone 5 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 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 downward movement of the cone lift arm 17, the tongue piece 62 slides on the leaf spring 63 and escapes into the opening 64 as shown in FIG. 6c 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 1
The base 18 of 7 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 in the operating state in which the magnetic disk 6 is inserted and the door 26 is closed, the eject plate 55 is Since the eject prevention piece 66 is engaged with the base 18, the eject plate 55 does not perform an eject operation. That is, the bending piece 59 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. can. Note that this ejection prevention piece 66 has an escape hole 67 formed at a position opposite to the cone lift arm 17, which may cause problems when closing the door 26 without the magnetic disk 6 inserted, as shown in FIG. 6a. It will never be. On the other hand, if the magnetic disk 6 is not fully inserted and the door 26 is closed, the cone lift arm 17 comes into contact with the top of the ejection prevention piece 66 and cannot 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.
This leaf spring 6
3, the eject plate 55 is lifted up (unlatched) from the stepped portion 61 in a stable manner, and the eject 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 in as far as it can be pushed, the pin 32 hits the pin regulating piece 41. Therefore, the pin 32 that has entered the groove 37
When the door 26 is released without overrunning the latch 39, the pin 32 is latched to the latch 39 and stopped as shown in FIG. 9b. 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.

In this invention, as described above, a tongue piece is formed on the cone road member, and a predetermined deformable plate material is provided on the eject plate, so that when a magnetic disk is inserted, the deformable plate material is pushed by the tongue piece and deformed in the opposite direction. This deformation generates a downward force to reliably latch the eject plate, and when the cone load member operates, the tongue pieces are released downward and are kept in standby, and when the cone load member returns, the tongue pieces are activated. The latch can be reliably released by lifting this deformed plate from below, and for such an operation, a simple structure is required with a small number of parts including the deformed plate and the tongue piece.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is an overall plan view, Figure 2 is a perspective view of the cone lift arm and door, Figures 3 a and b are side views showing their interlocking relationship, Figures 4 a and b are front views showing the gripping operation, and Figure 4 is a front view showing the gripping operation. Figure 5 is a perspective view of the eject plate.
Figures 6a-c are side views showing the operation of the eject mechanism, Figure 7 is a bottom view of the door latch mechanism, Figure 8 is a perspective view of the latch, Figures 9a-c are bottom views showing the latch operation; FIG. 10 is a bottom view showing the locked state. 4... Drive hub, 5... Cone, 6... Magnetic disk, 17... Cone lift arm (cone load member), 55... Eject plate, 62
...tongue, 63...plate spring (deformed plate material).

Claims (1)

[Scope of utility model registration request] A drive hub that is fixedly attached to the main body, a cone that is biased away from the drive hub and moves toward the drive hub to sandwich the magnetic disk, and a cone that holds the cone and opens and closes the door. a cone road member that moves in a direction substantially perpendicular to the direction of insertion and removal of the magnetic disk in response to the movement of the magnetic disk;
A guide member including a stepped portion and formed along the insertion/removal direction of the magnetic disk, and a guide member provided along the guide member and biased toward the door and the guide member, and the magnetic disk is provided along the guide member. An eject plate is formed with an abutting portion that abuts, and when the door is in an open state, the eject plate is engaged with the stepped portion by abutting against and bending a tongue piece formed on the cone road member. an opening portion that further urges the cone road member in the direction and releases the engagement with the tongue of the cone road member that moves when the door is closed; A floppy disk drive device comprising an elastic deformable member having a release portion for releasing engagement from a stepped portion.