JPH0555364U - Floppy disk drive - Google Patents

Abstract

(57) [Abstract] [Purpose] Maintains a constant height when the upper magnetic head of a floppy disk drive rises, regardless of the position from the outer circumference to the inner circumference of the floppy disk. , Make sure that the upper carriage arm does not come into contact with the chassis cover. An upper carrier plate 47 is pivotally attached to an upper surface of a rear end portion of a disk holder 24, and a front end portion 47a of the upper carrier plate is brought into contact with a lower surface side portion of an upper carriage arm 36. Then, in parallel with the moving direction of the carriage 34 of the magnetic head, the tip portion 47a of the upper carrier plate is formed.
The slit S is provided in the. As the carriage 34 of the magnetic head moves from the outer circumference to the inner circumference of the floppy disk, the tip portion 47a of the upper carrier plate is bent downward by the slit S, and the upper magnetic head 38 when the upper carriage arm 36 is raised. Maintain a constant height.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a floppy disk drive device, and more particularly to a vertical opening / closing device for a magnetic head carriage.

[0002]

[Prior Art]

 As shown in FIG. 7, in a conventional 3.5-inch type floppy disk drive device, a disk holder 2 is provided inside a chassis 1, and a part of an upper carriage arm 3 is an upper surface of a rear end portion of the disk holder 2. The upper magnetic head 4 and the lower magnetic head 5 are in an expanded state.

Then, when the floppy disk 8 is inserted from the insertion port 7 of the front panel 6, the slider 10 is moved forward by the tension of the spring 9, and is engaged with the grooves 11, 11, 11, 11 of the slider 10. The pins 12, 12, 12 1, 12 2 of the disc holder 2 are pressed and the disc holder 2 is lowered. Therefore, the upper carriage arm 3 which is locked to the rear end of the disk holder 2 is rotated downward by the urging force of the spring 13, and as shown in FIG. The upper magnetic head 4 and the lower magnetic head 5 contact each other, and the floppy disk 8 is set in a readable / writable state.

On the other hand, when the floppy disk 8 is taken out from the above state, if the eject button 14 of the front panel 6 is pushed in, the disk holder 2 is lifted by the operation reverse to the above, and the state shown in FIG. 7 is restored. Then, the floppy disk 8 is ejected.

[0005]

[Problems to be solved by the device]

 In the conventional floppy disk drive device, since a part of the upper carriage arm 3 is locked to the disk holder 2, in order to expand the upper carriage arm 3 with a sufficient clearance, the upper and lower parts of the disk holder 2 should be opened. The distance of movement must be great. For this reason, the thickness of the chassis 1 is increased, and there is a limit to thinning the floppy disk drive device.

Further, the height of the upper magnetic head 4 at the time of expansion is determined by the position where the disk holder 2 is raised, and the height when the upper magnetic head 4 is at the outer peripheral position of the floppy disk and when it is at the inner peripheral position. Then, the height at the time of expansion is likely to vary. Therefore, the upper carriage arm 3 may come into contact with the cover or the like of the chassis 1. Therefore, while making the vertical movement of the disk holder small, the expansion of the upper carriage arm is made smooth, and the height of the upper magnetic head is maintained regardless of the position from the outer circumference to the inner circumference of the floppy disk. The technical problem to be solved in order to maintain the constant value arises, and the present invention aims to solve this problem.

[0007]

[Means for Solving the Problems]

 This invention has been proposed to achieve the above object. In a floppy disk drive device having a disk holder for holding a floppy disk inside a chassis, an upper carrier plate is provided on the side of the magnetic head carriage. And the lower carrier plate facing each other, the upper carrier plate is pivotally attached to the upper surface of the rear end of the disk holder, and a slit is provided at the tip of the upper carrier plate parallel to the carriage movement direction of the magnetic head. Part is brought into contact with the lower surface side of the upper carriage arm, the other end is locked to the notch on the side surface of the chassis, and the tip of the lower carrier plate is brought into contact with the upper surface side of the lower carriage arm. The other end to the holes on the side of the chassis, The carrier plate is freely rotating, Ru der provides a floppy disk drive apparatus is characterized in that the opening and closing self standing the carriage of the magnetic head up and down by rotation of the upper carrier plate and the lower carrier plate.

[0008]

[Operation] Since the upper carrier plate is pivotally attached to the upper surface of the rear end portion of the disc holder, the front end portion of the upper carrier plate is inclined at substantially the same angle as the inclination of the disc holder. Is higher than the rear end. In the present invention, since a slit is provided at the tip of the upper carrier plate parallel to the moving direction of the magnetic head carriage, the upper carriage moves from the outer circumference to the inner circumference of the floppy disk as the upper magnetic head moves. When moved to, the slit causes the tip of the upper carrier plate to bend downward.

Therefore, the upper carriage moves back and forth while maintaining a constant height without contacting the chassis cover or the like.

[0010]

【Example】

 An embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 shows the inside of a 3.5-inch type floppy disk drive device. A front panel 22 is attached to the front surface (left side in the drawing) of a chassis 21, and an insertion opening 23 is opened in this front panel 22. A disc holder 24 is provided inside the chassis 21, and support shafts 25, 25 are provided on both side surfaces of a rear end portion of the disc holder 24 so as to project, and shaft holes 26, which are opened on both left and right side surfaces of the chassis 21, The support shafts 25, 25 are fitted and inserted into the disk 26, and the disk holder 24 is formed so as to rotate up and down with the support shafts 25, 25 as fulcrums. Although not shown, a pin may be provided so as to project inward from the left and right side surfaces of the chassis 21, and a shaft hole may be opened and engaged with the disc holder 24.

A slider 27 is provided between the disc holder 24 and the chassis 21. The slider 27 is interlocked with an eject button 28 protruding from the front surface of the front panel 22, and is slidable in the front-rear direction in a horizontal state along the bottom surface and the left and right side surfaces of the chassis 21. A spring 31 is interposed between a locking piece 29 provided and a locking piece 30 provided on the upper surface of the disc holder 24, and the slider 27 is pulled forward. In the illustrated state, the hook 32 provided on the rear portion of the slider 27 is locked by the stopper arm 33, and the forward movement is locked.

Further, a carriage 34 for a magnetic head is provided at the rear of the chassis 21, a carriage 34 for the magnetic head is slid back and forth by a stepping motor 35, and an upper carriage arm 36 and a lower carriage arm which are vertically movable. An upper magnetic head 38 and a lower magnetic head 39 are attached to the respective tip portions of the frames 37. Reference numeral 40 is a drive motor, which drives the belt 41 to rotate the disc table 42.

Then, a spring holder 43 formed of a metal elastic member is mounted on the upper surface of the disk holder 24, and arm portions 44, 44 are projectingly provided on both left and right sides of the spring holder 43, and grooves are opened on both side surfaces of the chassis 21. The arm portions 44, 44 are locked in the holes 45, 45 to regulate the rising range of the disk holder 24. Reference numeral 46 is a 3.5-inch floppy disk.

As shown in FIGS. 2 and 3, an upper carrier plate 47 and a lower carrier plate 48 are provided opposite to each other on the side of the carriage 34 of the magnetic head. Both sides of the upper carrier plate 47 are folded back upward to provide bent portions 49, 49, and cut-and-raised pieces 50, 50 are provided on the upper surface of the rear end portion of the disc holder 24. Then, the upper carrier plate 47 is inserted between the one cut-and-raised piece 50 and the other cut-and-raised piece 50, and the bent portions 49, 49 and the cut-and-raised pieces 50, 50 are attached to the pin 51 in the front-back direction of the chassis 21. And the upper carrier plate 47 is pivotally attached.

Then, a slit S is provided in the tip portion 47a of the upper carrier plate in parallel with the moving direction of the carriage 34 of the magnetic head, and the tip portion 47a is provided on the lower surface side of the locking piece K of the upper carriage arm 36. And the bent portion 49 of the other end portion 47b of the upper carrier plate is inserted into the cutout portion 52 formed in the side surface of the chassis 21, and the protrusion 53 on the upper side of the cutout portion 52 is attached to the other end of the upper carrier plate. The portion 47b is brought into contact with the upper edge portion. Further, a projecting piece 54 is provided at the rear end of the spring holder 43 and extends toward the carriage 34 side of the magnetic head, and the tip 54a thereof abuts the upper surface of the tip 47a of the upper carrier plate. In the state shown in the figure, since the disk holder 24 is in the ascending position, the tip portion 47a of the upper carrier plate pivots upward about the pin 51 that is its pivotal portion, and the upper carriage arm 36 moves upward. It is pushed up.

FIG. 4 is a sectional view taken along the line BB in FIG. 2, showing a state in which the upper carriage arm 36 is pushed upward when the upper magnetic head 38 is at the outer peripheral position of the floppy disk 46 described above. Is shown. Therefore, the locking piece K of the upper carriage arm 36 is positioned on the rear side (left end side in the figure) of the tip end portion 47a of the upper carrier plate.

Further, FIG. 5 is a sectional view taken along the line BB in FIG. 2, and when the upper magnetic head 38 is at the inner peripheral position of the floppy disk 46, the upper carriage arm 36 is pushed upward. It shows the state. In that case, the locking piece K of the upper carriage arm 36 is located on the front side (the right end side in the figure) of the tip portion 47a of the upper carrier plate. As described above, since the slit S is provided at the tip portion 47a of the upper carrier plate, the portion beyond the slit S is bent downward, and the locking piece K of the upper carriage arm 36 is slightly lowered. ..

Therefore, as shown by the chain double-dashed line in FIG. 5, when the upper magnetic head 38 is at the outer peripheral position of the floppy disk 46, and as shown by the solid line in FIG. The distance D from the upper end of the chassis 21 is substantially the same when it is at the inner peripheral position of 46. That is, regardless of the position of the upper magnetic head 38 from the outer circumference to the inner circumference of the floppy disk 46, when the upper carriage arm 36 is raised, the upper magnetic head 38 always maintains a constant height, and There is no possibility of contact with the cover (not shown) of 21 or the like.

On the other hand, as shown in FIGS. 2 and 3, the lower carrier plate 48 has its tip end portion 48a abutted on the upper surface side portion of the lower carriage arm 37, and the other end portion 48b of the lower carrier plate 48. Is bent and inserted into the hole 55 of the chassis 21, and is supported by interposing the pin 56, and the lower carrier plate 48 is biased in the ascending direction. Then, a convex cam portion 57 is provided on the upper surface of the lower carrier plate 48, and a convex portion 58 is provided on the lower surface of the rear end portion of the slider 27 so that it can ride on the cam portion 57. In the state shown in the drawing, the slider 27 is in a position sliding to the rear of the chassis 21, and the convex portion 58 provided on the lower surface of the rear end portion of the slider 27 rides on the cam portion 57 of the lower carrier plate 48. The plate 48 is pressed downward, and the tip end 48a of the lower carrier plate is rotated downward to push down the lower carriage arm 37.

Here, when the floppy disk 46 shown in FIG. 1 is inserted from the insertion port 23 of the front panel 22, the floppy disk 46 is housed inside the disk holder 24. Further, the rear end portion of the floppy disk 46 pushes the tip end portion 33a of the stopper arm rearward, the hook 32 of the slider 27 is disengaged, and the slider 27 is slid forward by the urging of the spring 31. At the same time, the stopper pieces 59, 59 vertically extending from both sides of the rear end portion of the disc holder 24 shown in FIGS. 2 and 3 and the stopper piece 60 standing upright at the rear end portion of the lower carrier plate 48 are provided to the rear of the floppy disk 46. The ends are locked and the floppy disk 46 is placed on the disk table shown in FIG.

As shown in FIG. 6, as the disk holder 24 moves downward, the tip portion 47a of the upper carrier plate rotates downward, and the upper carriage arm 36 moves to the belt (reference numeral in FIG. 1). It is rotated downward by the bias of 61). Further, as the slider 27 slides forward, the convex portion 58 of the slider 27 separates from the cam portion 57 of the lower carrier plate 48. As described above, since the lower carrier plate 48 is biased to rotate upward, the pressing of the convex portion 58 of the slider 27 is released, so that the tip end portion 48a of the lower carrier plate moves upward. Turn to. Therefore, the lower carriage arm 37 is rotated upward by the biasing force of the spring (not shown).

Thus, as shown in the figure, the upper magnetic head 38 and the lower magnetic head 39 come into contact with the magnetic recording surface so as to sandwich the floppy disk 46 from the upper and lower sides, and the floppy disk 46 reads and writes. Set to a possible state. When the floppy disk 46 is taken out, the eject button 28 shown in FIG. 1 is pushed in and the slider 27 is slid backward. After returning to the state shown, the upper carriage arm 47 and the lower carriage arm 48 are expanded to separate the upper magnetic head 38 and the lower magnetic head 39 from both sides of the magnetic recording surface of the floppy disk 46.

It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified version.

[0024]

[Effect of the device]

 As described in detail in the above embodiment, the present invention opens and closes the upper and lower carriage arms by rotating the upper carrier plate and the lower carrier plate, so that the vertical movement of the disk holder can be made small. By providing a slit at the tip of the upper carrier plate, when the upper carriage arm moves from the outer circumference to the inner circumference of the floppy disk, the portion beyond the slit of the upper carrier plate bends downward. It is possible to maintain a constant height when the upper carriage arm is raised regardless of the position of the upper magnetic head from the outer circumference to the inner circumference of the floppy disk.

Therefore, there is no possibility that the upper carriage arm will come into contact with the cover of the chassis or the like, and the reliability regarding the operation of the floppy disk drive device will be improved.

[Brief description of drawings]

FIG. 1 is a plan view showing the inside of a floppy disk drive device according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional front view of essential parts showing a state in which an upper carriage arm and a lower carriage arm are expanded.

FIG. 3 is a view taken along the line AA of FIG.

FIG. 4 is a sectional view taken along the line BB of FIG. 2 when the upper magnetic head is located at the outer peripheral position of the floppy disk.

5 is a sectional view taken along the line BB of FIG. 2 when the upper magnetic head is at the inner peripheral position of the floppy disk.

FIG. 6 is a vertical cross-sectional front view of essential parts showing a state in which an upper carriage arm and a lower carriage arm are closed.

FIG. 7 is a partially cutaway side view showing a conventional floppy disk drive device with an upper carriage arm expanded.

FIG. 8 is a partially cutaway side view showing a conventional floppy disk drive device in which a floppy disk is set inside and an upper carriage arm is closed.

[Explanation of symbols]

 21 Chassis 24 Disk Holder 27 Slider 34 Magnetic Head Carriage 36 Upper Carriage Arm 37 Lower Carriage Arm 38 Upper Magnetic Head 39 Lower Magnetic Head 46 Floppy Disk 47 Upper Carrier Plate 48 Lower Carrier Plate 47a, 48a Tip 47b, 48b, etc. End 52 Cutout 55 Hole S Slit K Locking piece

Claims (1)

[Scope of utility model registration request] 1. A floppy disk drive device having a disk holder for holding a floppy disk inside a chassis, wherein an upper carrier plate and a lower carrier plate are provided facing each other on the side of a carriage of a magnetic head. Is pivotally attached to the upper surface of the rear end of the disk holder, and a slit is provided at the tip of the upper carrier plate parallel to the carriage movement direction of the magnetic head, and the tip is brought into contact with the lower side of the upper carriage arm. At the same time, the other end is locked to the notch on the side of the chassis, and the tip of the lower carrier plate is brought into contact with the upper side of the lower carriage arm, and the other end is locked to the hole on the side of the chassis. The upper carrier plate and the lower carrier plate so that the upper carrier plate and the lower carrier plate are rotatable. A floppy disk drive device characterized in that a carriage of a magnetic head can be opened and closed vertically by rotating a plate and a lower carrier plate.