JPH0237157Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a magnetic disk drive device using a video floppy disk for an electronic still camera.

[Background of the idea]

Most floppy disk drives are equipped with a disk ejecting mechanism called an eject mechanism, which makes the operation of ejecting a disk extremely simple.

Therefore, in consideration of the operability, it is desirable to add an eject mechanism to video floppy disk drive devices for electronic still cameras, which are currently being commercialized by various companies.

By the way, when using this eject mechanism,
If the spring force for ejecting the disk is too strong, the disk may be ejected too much from the device and fall, potentially damaging the disk. Therefore, an ejection mechanism called a soft eject mechanism is sometimes used. Various types of soft eject mechanisms have been proposed in the fields of cassette tape recorders and floppy disk drives, but all of them use a damper mechanism such as an oil damper or a windmill type damper to weaken the spring force for ejecting the media. We have
The number of parts increased, leading to increased costs, and the space factor was also bad.

[Purpose of invention]

The present invention has been developed in view of the above points, and the object thereof is to provide a magnetic disk drive device that enables soft eject with a simple and inexpensive configuration.

Another object of the present invention is to perform soft ejection using essential components in a video floppy disk drive device.

[Summary of the idea]

The above object of the present invention is to provide a drive device using a video floppy disk in which a cassette is inserted and
A cassette storage body to be guided, an ejection lever that is pressed by the cassette and rotates as the cassette is inserted into the cassette storage body, an ejection spring that applies rotational force to the ejection lever in the cassette ejection direction, and a cassette storage body. a shutter lever that is rotatably held and has an engaging portion that can be freely engaged with a hole in the shutter, and a shutter lever spring that biases the shutter lever in a direction in which the shutter lever is brought into contact with a stopper of the ejection lever. When the cassette is inserted, the ejecting spring is charged, the ejecting lever is rotated, and the ejecting lever is locked at a predetermined position. The shutter lever is engaged with the hole in the shutter when the cassette is halfway inserted by interlocking and rotating the shutter lever, and after the shutter lever is engaged with the hole, the shutter lever is moved against the shutter lever spring as the ejection lever rotates. While charging this, the shutter lever is kept in elastic contact and engagement with the shutter,
This is generally achieved by relaxing the force of the discharge spring acting on the cassette when the cassette is discharged by the force of the charged shutter lever spring.

[Example of idea]

Figures 1 to 3 relate to an embodiment of the present invention, Figures 1 and 2 are plan views of the main parts, Figure 3 is a simplified side view of the main parts, and Figures 4 and 5 are video floppies. FIG. 2 is a plan view and a side view showing a disk.

Prior to working examples, a video floppy disk for electronic still cameras, the standard of which has been roughly determined, will first be described with reference to FIGS. In the figure, reference numeral 1 denotes a plastic cassette (hard case) in which a flexible magnetic disk 2 is housed. 3 is a head window provided on the cassette 1, and 4 is a shutter for closing or opening this head window, which is slidable along one side of the cassette. The shutter 4 is formed by bending a metal plate into a substantially flat U-shape, and has a first hole 4a and a second hole 4b bored in its side end surface (FIG. 5). When the shutter 4 is in the closed state, an elastic locking piece 5 built into the cassette 1 is attached to the first hole 4a (and the small protrusion on the edge of the hole).
is engaged so that the shutter 4 is maintained in its closed state. Also, by sliding a pin or the like into the groove 6 on the side end surface of the cassette 1, the elastic locking piece 5 is bent to release the closed lock state of the shutter 4. The shutter 4 is brought to the open position by pressing one end 4c of the shutter and sliding the shutter to the right in the figure. The second hole 4b is formed so that an appropriate shutter control member for maintaining the open state of the shutter 4 can be engaged therein. It is adapted to be held and slid from an open position to a closed position.

That is, unlike 3-inch and 3.5-inch floppy disks, the video floppy disk does not have a spring that biases the shutter in the closing direction, so it is necessary to use shutter control to move the shutter 4 from the open position to the closed position. It is necessary to provide a member on the magnetic disk drive side, and in the present invention, this shutter control member (shutter lever) is used to perform a simple soft eject. In addition, in Fig. 4,
7 is the center hole of the cassette 1, and 2a is the center hub of the magnetic disk.

The present invention will be explained below with reference to the embodiments shown in FIGS. 1 to 3.

In the figure, reference numeral 10 denotes a cassette storage body, which is rotatably attached to the main body of the apparatus (not shown) around its proximal arms 11, 11. The cassette storage body 10
The cassette 1 can be guided and advanced to the back by inserting the cassette 1 with fingers or the like, and by pushing the cassette 1 to a predetermined position and then pushing down and locking the cassette storage body 10. Although not shown, the magnetic disk 2 is chucked to the spindle member, and the portion of the magnetic disk 2 exposed by the head window 3 has a
A magnetic head and a pressing member are adapted to contact and hold this. 12 is a cassette storage body 1
A mounting seat portion extending to the side of the upper surface of 0, 13, 14,
Reference numeral 15 designates an arcuate hole, a circular hole, or a square hole drilled in the upper surface of the cassette container 10, and most of the lower surface of the cassette container 10 is open.

16 is the ejection lever, 17 is the shutter lever,
A shaft 18 is supported in the mounting seat portion 12 so as to be rotatable separately. A pin 16a is installed on the free end side of the ejection lever 16, and this pin 16a projects into the interior of the cassette storage body 10 (the insertion path for the cassette 1) through the arcuate through hole 13. Reference numeral 19 denotes an ejection spring stretched between the ejection lever 16 and the cassette storage body 10, which imparts a rotational force to the ejection lever 16 in the ejection direction of the cassette 1 (a rotational force in the counterclockwise direction in the figure). As a result, when the cassette 1 is not inserted, the pin 16a of the ejection lever 16 is inserted into the arcuate through hole 1.
It is located at the position shown by the two-dot chain line in FIG.

Reference numeral 20 denotes a shutter lever spring, which applies rotational force to the shutter lever 17 in the counterclockwise direction shown in the figure. is brought into contact with a stopper pin 16b provided at the base end of the ejection lever 16. At this time, the shutter lever 17 is in the position shown by the two-dot chain line in the same figure, and the engaging portion 17a at the tip thereof is brought into contact with the stopper pin 16b provided at the base end of the ejection lever 16. It is evacuated outside the insertion path. Although the shutter lever spring 20 is constructed of a wire spring in this embodiment, it may also be a tension coil spring stretched between the shutter lever 17 and the ejection lever 16. An appropriate one is selected depending on the set charge force.

Reference numeral 21 denotes a shutter release pin, which is colored black for convenience of illustration, but is planted inward from the side plate of the cassette storage unit 10, and is attached to the cassette 1.
When the shutter 4 is inserted into the cassette storage body 10, the shutter 4 is unlocked by the elastic locking piece 5, and the one end 4c of the shutter 4 is pressed to open the shutter 4. Reference numeral 22 denotes a lock mechanism which, when the ejection lever 16 is rotated to the right against the ejection spring 19 to a predetermined position, engages with the engaging portion 16c of the ejection lever 16 to move the ejection lever to the second position.
It is for holding in the position shown in the figure, and although the illustration is simplified, any suitable means known in the field of floppy disk drives and cassette tape recorders can be used. For example, a lock lever is provided which is given rotational bias in a certain direction by a spring and comes into contact with a stopper, and the engaging portion 16c comes into contact with the inclined cam surface of the lock lever, so that the lock lever resists the spring. When the engaging portion 16c passes over the inclined cam surface, the lock lever is returned to lock the engaging portion 16c.

In the above configuration, when the cassette 1 is inserted into the cassette storage body 10, the front end surface of the cassette 1 in the insertion direction comes into contact with the pin 16a of the ejection lever 16,
As the cassette 1 is inserted, the ejection lever 16 is moved to the first position.
Rotate to the right from the position shown by the two-dot chain line in FIG. Initial stage of clockwise rotation of this ejection lever 16 (initial stage of insertion of cassette 1)
In this case, the shutter lever 17, which is pressed against the stopper pin 16b of the ejection lever 16 by the shutter lever spring 20, rotates to the right from the two-dot chain line position in FIG. 1 to the solid line position together with the ejection lever 16. In the position shown by the solid line in FIG.
At this time, the engaging portion 17a of the shutter lever 17 is engaged with the second hole 4b of the shutter 4.

Then, if you continue to insert cassette 1 to the back,
The ejection lever 16, whose pin 16a is pressed by the cassette 1, turns further to the right while charging it against the ejection spring 19, and when the cassette 1 is pushed to a predetermined position, the ejection lever 16 rotates as described above as shown in the second figure. This position is held by a locking mechanism 22. On the other hand, the shutter lever 17, which has its engaging portion 17a in contact with the shutter 4, is prevented from rotating clockwise, and as a result, the shutter lever spring 20 is charged, and the second shutter lever 17, in which the shutter 4 is completely opened, is In the state shown in the figure, the shutter 4 is pressed most strongly from the side.

When the cassette storage body 10 is pushed down from the state shown in FIG. 2 as shown in FIG. The cassette storage body 10 is held in its lower position by the engagement of the projections 25,
The magnetic disk 2 is placed in the above-described writable/readable state. In addition, in FIG. 3, 26 is a spring that imparts an upward biasing tendency to the cassette storage body 10, 27 is a stopper of the locking lever 24, and 28 is a
This is an eject lever for releasing the engagement and lock between the locking lever 24 and the protrusion 25 described above, and is given a rightward sliding bias by a spring (not shown).

When ejecting the cassette 1, push the eject lever 28 to the left to release the engagement between the locking lever 24 and the protrusion 25, and also press the eject lever 28 to the left as indicated by the dotted line in Figure 3. The locking mechanism 22 described above is pressed at the portion 28a to release the locked state of the ejection lever 16 by the locking mechanism. (In addition,
If a mechanism is adopted in which the locking mechanism is unlocked in conjunction with the depression and locking of the cassette storage body 10, the extension portion 28a is not necessary. ) As a result, the cassette storage body 10 is raised by the spring 26.

As the cassette storage body 10 rises, the cassette is separated from the spindle member, positioning pin, etc. (not shown), and when this separation is completed, the ejection of the cassette 1 by the ejection spring 19 is started.
At the beginning of this ejecting operation, the force of the ejecting spring 19 acts most strongly on the cassette 1 via the ejecting lever 16; As a result, the force of the discharge spring 19 is canceled out, and the cassette 1 is gradually discharged without being pushed out suddenly. Further, since the shutter lever 17 is engaged with the second hole 4b of the shutter 4, the shutter 4 moves in the closing direction as the cassette 1 is ejected, and when the cassette 4 reaches the closing position, the shutter lever 17 is engaged with the second hole 4b of the shutter 4. 17 and the ejection lever 16 rotate together, the shutter lever 17 is removed from the cassette 1, and the shutter 4 is held in the closed position by the elastic locking piece 5. Then, the ejection lever 16 is
At the time when the cassette 1 returns to the position indicated by the two-dot chain line in FIG.

[Effect of idea]

As described above, according to the present invention, in a drive device using a video floppy disk, the force of the shutter lever spring acts on the cassette through the shutter lever, which is an essential member for moving the shutter from the open position to the closed position. Since the spring force for ejecting the cassette is suppressed by this, a simple soft ejection can be realized, and sudden and excessive ejection of the cassette can be suppressed, thereby improving operational reliability. In addition, since a separate expensive damper mechanism is not provided, it is inexpensive, has a good space factor, and has a simple mechanism, so its practical value is remarkable.

[Brief explanation of the drawing]

1 to 3 relate to one embodiment of the present invention, in which FIGS. 1 and 2 are plan views of the main parts showing different operating states, FIG. 3 is a simplified side view of the main parts, and FIG. 4 is a simplified side view of the main parts.
FIG. 5 is a plan view and a side view of a video floppy disk for an electronic still camera. 1...cassette, 2...magnetic disk, 3...
Head window, 4...Shutter, 4a...1st
hole, 4b...second hole, 5...elastic locking piece, 1
0...Cassette storage body, 16...Ejection lever, 1
7...Shutter lever, 19...Ejection spring, 20
...Shutter lever spring.

Claims (1)

[Claims for Utility Model Registration] A cassette containing a flexible magnetic disk, a shutter that is slidable along one side of the cassette and opens or closes a head window of the cassette, and a closed position of the shutter. a first hole provided in the side end surface of the shutter for engaging with an elastic locking piece inside the cassette; and an appropriate shutter control for maintaining the shutter in the open position and transitioning from the open position to the closed position. A device for driving a video floppy disk is provided with a second hole provided in the side end surface of the shutter and is adapted to engage with a member, the device for driving a video floppy disk includes a cassette storage into which the cassette is inserted and guided. an ejection lever that rotates when pressed by the cassette as the cassette is inserted into the cassette storage body, an ejection spring that applies rotational force to the ejection lever in the cassette ejection direction, and a second ejection lever of the shutter. A shutter lever that is rotatably held and has an engaging portion that can be freely engaged with a hole, and a shutter lever spring that biases the shutter lever in a direction in which it comes into contact with a stopper of the ejection lever, By inserting the cassette, the ejecting spring is charged and the ejecting lever is rotated to lock the ejecting lever at a predetermined position.At the beginning of insertion of the cassette, the shutter lever is interlocked with the rotation of the ejecting lever. The shutter lever is rotated to engage the second hole of the shutter when the cassette is halfway inserted, and after the shutter lever is engaged with the second hole, the shutter lever spring is rotated as the ejection lever rotates. While charging this, the shutter lever is kept in elastic contact with and engaged with the shutter, and the force of the discharge spring acting on the cassette when the cassette is ejected is alleviated by the force of the charged shutter lever spring. A magnetic disk drive device characterized by: