JP2857938B2 - Floppy disk access drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floppy disk drive for storing and ejecting a floppy disk as a magnetic recording medium in a drive device.

[0002]

2. Description of the Related Art A floppy disk drive (hereinafter referred to as an FDD) provided in an electronic still camera or the like moves a spindle motor for rotating a floppy disk at a high speed and a head carriage in a radial direction of the floppy disk. A stepping motor to be driven and a slot-in / out motor for moving and storing the inserted floppy disk at the recording / reproducing position of the FDD device and discharging the floppy disk from the storing position to a removable position are provided.

That is, when a floppy disk is inserted into an FDD device, the floppy disk is pulled in by a motor drive to a predetermined position where recording or reproduction is performed. The floppy disk stored in this predetermined position is
The spindle motor is rotated at high speed, and the head carriage is driven and moved by the stepping motor to record information or read recorded information by the magnetic head.

When a floppy disk is taken out, a floppy disk housed in a predetermined position is ejected and driven by a slot-in / out motor, and the floppy disk portion protrudes from the FDD device. Therefore, the protruding portion can be grasped with fingers and pulled out. Actually, a floppy disk is rotatably mounted in a thin pack, and a center core exposed substantially at the center is fitted to a spindle motor. When the floppy disk is inserted into the FDD device, a shutter provided in a part of the pack is opened, and the magnetic head comes into contact with the floppy disk surface through the shutter window.

[0005]

The above-mentioned FDD apparatus comprises a spindle motor for rotating a floppy disk, a stepping motor for driving and moving a head carriage, and a motor for slot-in / out of a floppy disk. The three drive sources and the interlocking mechanism are independent, which is a factor that increases the production cost, and the effective use of the embedded space by increasing the number of parts There was a problem that it became difficult.

In view of the above circumstances, the present invention can drive the floppy disk in and out by a driving source for moving and driving the head carriage, and can omit an independent slot-in / out motor and its interlocking mechanism. The purpose of this invention is to develop a floppy disk access drive.

In order to achieve the above object, according to the present invention, there is provided a reel which rotates by using a motor as a drive source.
In an FDD device provided with a head carriage that is moved and driven by a screw, a carriage driving mechanism that moves and moves the head carriage to a recording / reproducing range and an interlocking range exceeding the range is provided so as to be meshable with the lead screw. A clutch gear that engages with the head carriage that has moved to the interlocking range, and a floppy-disk in-and-out interlocking mechanism that interlocks with the clutch gear to store the floppy disk in a predetermined position and ejects the floppy disk from the storage position. Floppy characterized by comprising
A disk drive is proposed.

[0008]

When the head carriage is driven to move within the range of recording and reproduction, the magnetic head records information on a floppy disk and reads information from the floppy disk as in the prior art. When storing the floppy disk in the FDD device and ejecting it from the FDD device,
The head carriage is driven to move to the interlocking range.

When the head carriage moves to the interlocking range, the clutch gear meshes with the lead screw, and the clutch gear interlocks with the floppy disk input / output interlocking mechanism. This in-and-out interlocking mechanism stores the floppy disk when the clutch gear is interlocked with the other rotation of the lead screw so that the floppy disk is ejected when the clutch gear is interlocked with one rotation of the lead screw. Each operates as follows.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing a head carriage driving mechanism and a floppy disk in / out interlocking mechanism incorporated in the FDD device, and FIG. 2 is a left side view of each of these mechanisms.

In these drawings, reference numeral 11 denotes a head carriage, which reciprocates left and right in FIG. 1 in conjunction with a lead screw (worm gear) 13 which is rotated by a stepping motor 12. That is, the connecting plate 14 made of an elastic plate is fixed to the head carriage 11, and the head carriage 11 is moved and driven by engaging the hook portion 14a provided at the end of the connecting plate 14 with the lead screw 13. There is a configuration. (See Fig. 3)

Further, the connecting plate 14 is provided with a push receiving plate 14b projecting perpendicularly to the moving direction of the head carriage 11. The push receiving plate 14b functions to separate the hook portion 14a from the lead screw 13 when pushed by a cam responsive shaft described later.

The above-described head carriage 11 moves in the left-right direction in FIG. 1 in accordance with guide rods 15 and 16 provided on both sides thereof, and a magnetic head 17 fixed to the carriage 11 is provided.
Is moved in the radial direction of a floppy disk (not shown). The head carriage 11 has a cam projection 18.
Is provided. The cam projection 18 is a floppy disk to be described later.
This interlocks with the disc input / output interlocking mechanism.

On the other hand, the illustrated double gear is a large-diameter gear 19.
a and the small-diameter gear 19b are integrated into the clutch gear 19
It is. The clutch gear 19 is mounted on one arm of a two-arm lever 21 pivotally supported on a support shaft 20.

The two-arm lever 21 is pivotally supported by a support shaft 20 provided on the support plate 22, and gives a turning force in a counterclockwise direction (the direction of the arrow shown in the figure) by a spring (not shown), and the stopper-2.
The turning is stopped by 3. In this state, the large diameter gear 19a of the clutch gear 19 is separated from the lead screw 13 and the small diameter gear 19b is separated from the interlocking gear 24. The other arm 21a of the two-arm lever 21 is opposed to the cam projection 18 of the head carriage 11, and the other arm 21a is pushed around by the cam projection 18 so that the two-arm lever 21 is moved. Turning clockwise, the large diameter gear 19a of the clutch gear 19 meshes with the lead screw 13, and the small diameter gear 19b meshes with the interlocking gear 24.

The clutch gear 19 is hollow and is rotatably fitted to a cylindrical shaft 21b provided at the tip of one arm of a two-arm lever 21 as shown in FIG. And
The cylindrical shaft 21b is provided above the clutch gear 19 (FIG. 4).
A cam driven shaft 25 is further provided to penetrate into the cylindrical shaft 21b. The cam responsive shaft 25 has a key groove 25a extending in the longitudinal direction, and is non-rotatable by projecting a key convex portion 26a formed on the lid portion 26 into the key groove 25a. Cam driven shaft 2
A downward force is constantly applied by a spring 28 of a pressure-expanding action provided between the E-ring 27 locked to the cylinder 5 and the bottom of the cylindrical shaft 21b.

Further, a sliding projection 25b is provided on the lower surface of the head portion formed above the cam driven shaft 25 (FIG. 4), and the sliding projection 25b is formed on the upper surface of the clutch gear 19 (FIG. 4). It is configured to contact the angled cam 19c. That is, as shown in FIG. 4, the cam responsive shaft 25 is raised by the sliding protrusion 25b riding on the chevron cam 19c, and the clutch gear 19 is rotated to move the sliding protrusion 25b down the chevron cam 19c. As a result, the cam responsive shaft 25 is lowered by receiving the pressure expanding force of the spring 28.

The cam responsive shaft 25 pushes down the push receiving plate 14b of the connecting plate 14 by descending. Thus, the hook portion 14a is connected to the lead screw 1
The connecting plate 14 is bent so that the head carriage 11 and the lead screw 13 are separated from each other. When the cam response shaft 25 operates as described above, the head carriage 11 moves from the recording / reproducing range to the interlocking range, and the push receiving plate 14b of the connecting plate 14 is positioned directly below the cam response shaft 25. I have.

The interlocking gear 24 interlocked with the small-diameter gear 19b of the clutch gear 19 is driven by the driven gear 3 via an intermediate gear 29.
Drive 0. Then, the driven protrusion 3 of the driven gear 30
Oa moves a known slider provided in the FDD device, draws the floppy disk into a predetermined position in the FDD device, and discharges the floppy disk from the predetermined position. In addition,
The slider, basket, and the like provided in the FDD device will be described later. The floppy disk is the same as that of the conventional example and is housed in a pack.

Next, the operation of the above-described head carriage driving mechanism and the floppy disk loading / unloading interlocking mechanism will be described. When the floppy disk is stored in the recording / reproducing position, the floppy disk is rotated at a high speed by a spindle motor (not shown), and the head carriage 11 is rotated by the rotation of the lead screw 13 by the stepping motor 12. 1. Move up and left and right.
As a result, similar to a normal FDD device, the magnetic head 17
Thus, information is recorded on or read from the floppy disk. In this case, the head carriage 1
Reference numeral 1 denotes a range in which the cam projection 18 does not come into contact with the other arm 21a of the two-arm lever 21, that is, a range of recording or reproduction, and reciprocates according to the forward and reverse rotation of the lead screw 13.

While the head carriage 11 is moving within the recording / reproducing range as described above, the two-arm lever-21 is used.
As shown in FIG. 1, the clutch gear 19 maintains a position slightly separated from the lead screw 13 and the interlocking gear 24.
4. The intermediate gear 29 and the driven gear 30 are stationary. Therefore, the sliding protrusion 25b of the cam response shaft 25 rides on the chevron cam 19c, and the shaft 25 is at the raised position.

When removing the floppy disk from the FDD device, the head carriage 11 is switched so as to move from the recording / reproducing range to the interlocking range. That is, the moving distance of the head carriage 11 is extended to the left in FIG. 1, and the head carriage 11 is moved forward into the interlocking range. By this movement, the push receiving plate 14b of the connecting plate 14 is moved directly below the cam driven shaft 25, and as shown in FIG.
To push a against the spring force, double arm lever
21 pivots clockwise about the support shaft 20.

As a result, the large-diameter gear 1 of the clutch gear 19
9a meshes with the lead screw 13 and the small-diameter gear 19b meshes with the interlocking gear 24, and an interlocking gear system is connected by the lead screw 13, the clutch gear 19, the interlocking gear 24, the intermediate gear 29, and the driven gear 30. Also, in the initial stage when the clutch gear 19 meshed with the lead screw 13 rotates, the sliding projection 25b slides down from the chevron cam 19c, so that the cam responsive shaft 25 descends to push the push receiving plate 14b.
To push. As a result, the hook portion 14a is separated from the lead screw 13 and the interlocking relationship between the head carriage 11 and the lead screw 13 is cut off.
1 stops moving.

By the above operation, the driven gear 30 is rotated by the stepping motor 12 in the direction of the arrow shown in the figure, so that the slider of the FDD device is pushed by the driven projection 30a to eject the floppy disk. Since the floppy disk partially projects from the FDD device due to this discharge, the floppy disk is pulled out by hand and taken out.

On the other hand, a case where the floppy disk is stored in the FDD device will be described. In the FDD device from which the floppy disk is taken out, the clutch gear 19 is engaged with the lead screw 13 and the interlocking gear 24, and the hook portion 14a is separated from the lead screw 13. The floppy disk is inserted into the FDD device, and the stepping motor 12 is rotated in the reverse direction to that at the time of ejection. As a result, the response gear 30 rotates in the direction opposite to the arrow shown in the figure, moves the slider of the FDD device, and pulls in the floppy disk.

After the floppy disk is stored at the recording / reproducing position, the angled cam 19c of the clutch gear 19 goes under the sliding projection 25b, and the sliding projection 25b rides on the angled cam 19c. The response shaft 25 moves up. As a result, the pushing of the pushing receiving plate 14b is released, the hook 14a engages with the lead screw 13, and thereafter, the head carriage 11 moves rightward in FIG.

With the above movement of the head carriage 11, the cam projection 18 retreats, and the two-arm lever 21 rotates counterclockwise as the cam projection 18 retreats. Therefore, when the head carriage 11 moves from the interlocking range to the recording / reproducing range, the operation state shown in FIG. 1 is established, the clutch gear 19 is separated from the lead screw 13 and the interlocking gear 24, and the power transmission to the floppy disk input / output interlocking mechanism is performed. Cut off.

After the head carriage 11 moves to the recording / reproducing range, as described above, information recording on the floppy disk or reading of recorded information is performed.

FIGS. 6 to 8 are simplified diagrams showing the operation process of the slider 31 and the basket 32 interlocked by the drive gear 30. FIG. Since the slider 31 and the basket 32 have known structures, they will be briefly described. The slider 31 is slidably provided in the support plate 33. The rising plate portion is formed with regulating grooves 31a and 31b formed of a horizontal portion and an inclined portion.
1 is provided with an engagement pin 31c protruding into a turning area of a driving projection 30a provided on the driving gear 30.

A basket 32 for holding a floppy disk is provided in the slider 31. Guide pins 32a, 32b protruding from the side surface of the basket 32 pass through regulating grooves 31a, 31b of the slider 31 to support the support plate 3.
The third restriction grooves 33a and 33b protrude. The restriction grooves 33a and 33b are formed on the side surface of the support plate 33 as a horizontal portion and a vertical portion as shown in the drawing.

In the state shown in FIG. 6, the floppy disk is
When inserted into the DD device, it is held by the basket 32. With the floppy disk held in this manner, the driven gear 30 rotates as described above, and the driven
The engagement pin 31c is pushed by 0a. For this reason,
The slider 31 moves rightward, and the regulating groove 31a,
31b drives the guide pins 32a and 32b in the horizontal direction. As a result, the basket 32 moves horizontally and is retracted as shown in FIG.

When the slider 31 is further driven to move, the guide pins 32a and 32b are pushed downward by the regulation of the regulation grooves 31a and 31b, and the basket 32 is moved.
Descends as shown in FIG. When the basket 32 is lowered in this manner, the center core of the floppy disk is inserted into the rotating shaft of the spindle motor, and the floppy disk is placed at a storage position where recording and reproduction can be performed.

When the driven gear 30 rotates in the opposite direction to the above-mentioned case, the operation is reversed, and the floppy disk is ejected. That is, since the slider 31 moves leftward in the figure, the basket 32 once rises, moves leftward, and returns to the position shown in FIG. Basket 32
Can be pulled out of the FDD device by grasping the floppy disk portion with fingers.
The slider 31 is configured to slightly return (moving rightward in the figure) when the floppy disk is stored at the recording / reproducing position. Thereby, the response gear 30
Is rotated in the opposite direction, the reaction protruding piece 30a
c) and securely ejects the floppy disk.

[0034]

As described above, the floppy disk according to the present invention is provided.
If a disk input / output drive device is provided, a floppy disk input / output interlocking mechanism is interlocked by a motor drive source included in the head carriage driving mechanism. Can be omitted. As a result, F is suitable for simplifying the structure and reducing the production cost.
It is possible to provide a DD device.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a head carriage driving mechanism incorporated in an FDD apparatus and an interlocking mechanism of a floppy disk.

FIG. 2 is a left side view of each mechanism shown in FIG.

FIG. 3 is a partial view showing a clutch gear and a hook provided on a head carriage.

FIG. 4 is an enlarged sectional view of a clutch gear portion.

FIG. 5 is a configuration diagram similar to FIG. 1, showing the operation of a floppy disk in / out interlocking mechanism.

FIG. 6 is a simplified diagram showing a slider and a basket provided in the FDD device.

FIG. 7 is a simplified diagram similar to FIG. 6, showing a process of storing a floppy disk;

FIG. 8 is a simplified diagram similar to FIG. 6, showing a state where a floppy disk is stored at a recording / reproducing position.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Head carriage 12 Stepping motor 13 Lead screw 14 Connecting plate 14a Hook portion 14b Push receiving plate 17 Magnetic head 18 Cam protrusion 19 Clutch gear 19c Angle cam 21 Double arm lever 24 Interlock gear 25 Cam response shaft 29 Intermediate gear 30 Response gear

Claims (1)

(57) [Claims] In a floppy disk drive device provided with a head carriage which is moved and driven by a lead screw which rotates by using a motor as a drive source, a head carriage is provided with a recording / reproducing range and an interlocking range exceeding this range. A driving mechanism for driving the carriage, and a clutch gear that is provided to be meshable with the lead screw and engages with the head carriage that has moved to the interlocking range.
A floppy-disk in / out drive device comprising a floppy-disk in / out interlocking mechanism for accommodating a floppy disk in a predetermined position in conjunction with the clutch gear and ejecting the floppy disk from the storage position.