JPH0237158Y2 - - 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]

Video floppy disks for electronic still cameras, the standards of which have recently been standardized, are shown in FIGS. 3 and 4. (In addition, counter mechanisms etc. that are not directly related to the invention are omitted.) In the figure, 1 is a cassette (hard case) made of plastic, which houses a flexible magnetic disk 2. . Reference numeral 3 denotes a head window provided on the upper and lower surfaces of the cassette 1, which is closed by a shutter 4 when not in use. The shutter 4 is formed by folding a metal plate in half into a flat U-shape, and is attached so as to be slidable along one side of the cassette 1 so as not to fall off. On the side end surface (flat fold) of this shutter 4,
A first hole 4a and a second hole 4b are bored, and when the shutter 4 is in the closed state, an elastic locking piece 5 built in the cassette 1 is inserted into the first hole 4a.
(and a small protrusion on the edge of the hole) to maintain the closed position of the shutter 4. Further, when the shutter 4 is in the open state and when moving from the open position to the closed position, the second
An appropriate shutter control member is engaged with the hole 4b,
The open position is maintained and the transition from open to closed is performed. On the other hand, in order to open the closed shutter 4, a pin or the like is positioned in the groove 6 on the side end surface of the cassette 1, and the elastic locking piece 5 is bent by relative sliding between the pin and the cassette 1. Then, the engagement (lock) with the first hole 4a is released, and the one end 4 of the shutter 4 is released by the subsequent relative sliding.
The shutter 4 is opened by pressing c with a pin. In FIG. 3, 7 is the center hole of the cassette 1, and 2a is the center hub of the magnetic disk 2.

That is, the video floppy disk mentioned above is
Unlike 3-inch and 3.5-inch floppy disks, it does not have a spring that constantly biases the shutter in the closing direction, so the magnetic disk drives the appropriate shutter control member to bring the shutter from the open position to the closed position. It must be provided on the equipment side. A mechanism equipped with this shutter control member was published in Japanese Patent Publication No.
Although proposed in Japanese Patent No. 59-217266, the shutter control member of the earlier application has a relatively complicated assembly structure using pin-slot engagement, and the shutter control member does not operate properly when manually removing a cassette. Since it gave a slight feeling of resistance, it was not possible to take it out smoothly without feeling any resistance.

[Purpose of invention]

The present invention was developed in view of the above circumstances, and its purpose is to provide a magnetic disk drive device having a shutter control member that has an extremely simple configuration and does not cause a feeling of resistance when taking out a cassette. .

[Summary of the idea]

The above object of the present invention is to provide a device for using a video floppy disk for an electronic still camera, which includes a cassette storage body for guiding and holding an inserted cassette, and an end face of a cassette inserted into the cassette storage body. an ejection lever that rotates when pressed by the cassette, an ejection spring that constantly applies rotational force to the ejection lever in the cassette ejection direction, and an engaging portion that can be engaged with the second hole, and is held rotatably. the shutter control lever, and an engagement spring that constantly applies a rotational force to the shutter control lever in the direction in which the engagement portion thereof engages with the second hole, and In the non-inserted state,
The shutter control lever is controlled by the ejection lever.
The engaging portion is displaced and locked in a direction away from the second hole against the engaging spring, and while the cassette is being inserted into the cassette storage body, the ejecting lever rotated to a predetermined position engages the shutter. This is generally accomplished by unlocking the control lever and causing the engagement portion to engage the second hole.

[Example of idea]

1 and 2 relate to an embodiment of the present invention, and FIG. 2 is a simplified side view of the main part.

In FIG. 1, reference numeral 8 denotes a cassette storage body, which is installed in the main body of the apparatus (not shown) so as to be rotatable (up and down) about its base ends 8a, 8a. In the figure, the upper side of the cassette storage body 8 serves as an insertion/ejection opening for the cassette 1, and when the cassette storage body 8 is in the upper position, the cassette 1 can be inserted to a predetermined position in the back, and the cassette 1 can be inserted into the cassette 1 as described below. When the shutter 4 reaches the open position, the head window 3 is opened. and,
By locking the cassette storage body 8 in the lower position in this state, the center hub 2a of the magnetic disk 2 is chucked to a spindle member (not shown), and the magnetic disk 2 is attached to the portion of the magnetic disk 2 exposed in the head window 3. A magnetic head (not shown) comes into contact with it to enable desired writing and reading.

8b is the top plate of the cassette storage body, and the extension part 8b
-1, arcuate groove 8b-2, center hole 8b-3
etc. are formed. 9 is a shaft 10 attached to the top plate 8b.
The supported ejection lever applies rotational force in the cassette ejection direction (counterclockwise direction in FIG. 1) by the ejection spring 11 stretched between the first arm 9a of the ejection lever 9 and the top plate 8b. has been done. Reference numeral 9b denotes a pin implanted on the lower surface side of the first arm 9a, which protrudes from the arcuate groove 8b-2 into the inside of the cassette storage body 8 (insertion path for the cassette 1).
It can come into contact with the insertion tip surface of. 9c is
The bent portion 9d at the tip of the first arm 9a is a second arm that is connected to the first arm 9a with the pivot point of the ejection lever 9 as a boundary. When the cassette 1 is not inserted, the ejection lever 9 is in the position shown by the two-dot chain line in FIG. 1, with the pin 9b abutting the end of the arcuate groove 8b-2.

Reference numeral 12 denotes a shutter control lever supported by a shaft 13 on the extension 8b-1 of the top plate 8b, and has an engaging portion (protruding portion) 12a at its tip that can be engaged with the second hole 4b of the shutter 4 described above. is formed. 14 is the shutter control lever 12 and the top plate 8
A shutter control lever spring stretched between rotational force). The spring force of the shutter control lever spring 14 is set to be weaker than that of the ejection spring 11, and when the cassette 1 is not inserted, the pin 12b of the shutter control lever spring 14 contacts the second arm 9d of the ejection lever 9. - The pressed shutter control lever 12 is in the position shown by the two-dot chain line in FIG.
The engaging portion 12a is spaced apart from -1.

In FIG. 1, reference numeral 15 indicates a pin for opening the shutter 4 embedded in the side plate 8c, and a simplified member indicated by the reference numeral 16 is a locking mechanism that engages with the bent portion 9c of the ejection lever 9. There are methods known in the field of floppy disk drives and cassette tape recorders. For example, the lock mechanism 16 is configured to include a plate spring arm that is located in the entire lower part of the movement locus of the bending portion 9c and has a biasing property toward the front side of the page, so that the ejection lever 9 moves from the two-dot chain line position to the solid line line. When it reaches this position, it floats up and locks the ejection lever 9, and unlocks the ejection lever 9 in conjunction with the locking operation of the cassette storage body 8 to the lower position, which will be described later.

Further, in FIG. 2, reference numeral 17 is a spring that gives the cassette storage body 8 an upward biasing tendency, and 18 is a lock lever for maintaining the downward position of the cassette storage body 8. The position is regulated by a stopper 20. 21 is a lock pin of the cassette storage body 8, and when the cassette storage body 8 is pushed down against the spring 17,
This lock pin 21 presses the sloped end surface of the head of the lock lever 18, causing the lock lever 18 to rotate slightly to the left, and when the lock lever 18 passes the sloped head surface, the lock lever 18
is rotated to the right and locked as shown. Reference numeral 22 denotes an escape lever which is given a rightward sliding bias by a spring (not shown). By pushing this lever to the left, the locked state between the lock lever 18 and the lock pin 21 is released, and the cassette storage body is removed. 8 is adapted to return to the upper position.

In the above configuration, if the cassette 1 is inserted when the cassette storage body 8 is in the upper position, the cassette 1
The ejection lever 9, whose pin 9b is pressed, starts to rotate clockwise from the position shown by the two-dot chain line against the ejection spring 11. At the beginning of insertion of the cassette 1, the shutter opening pin 15 releases the lock of the shutter 4 caused by the elastic locking piece 5, and comes into contact with the one end 4c of the shutter 4 and starts to open the shutter 4. . When the cassette 1 continues to be inserted, as the ejection lever 9 rotates, the shutter control lever 12 is released from the shutter control lever 12 by the second arm 9d.
is separated from the pin 12b), the shutter control lever 12 is rotated clockwise from the position shown by the two-dot chain line, and its engaging portion 12a is projected into the cassette storage body 8 from the hole 8c-1, and the cassette is make elastic contact with the side end surface of 1. Subsequently, when the cassette 1 is inserted and pushed to a predetermined position, the ejection lever 9 reaches the position shown by the solid line where it is locked by the locking mechanism 16.
The engaging portion 1 of the shutter control lever 12 is inserted into the second hole 4b of the shutter 4 which has reached the open position with the pin 15.
2a is inserted.

In this state, when the cassette storage body 8 is pushed down and locked in the downward position as described above, the magnetic disk 2
becomes writeable/readable, and lock mechanism 1
The ejection lever 9 is also unlocked by the ejection lever 6.

When ejecting the cassette 1, the ejection bar 22 is pressed to eject the cassette storage body 8.
The lower position lock is released and the cassette storage body 8
is returned upward by the spring 17, and along with this, the ejection spring 11 is pressed against the pin 9b of the ejection lever 9.
The cassette 1 is pressed in the ejection direction through the . At the beginning and in the middle of this ejection, the engaging portion 12a of the shutter control lever 12 is engaged with the second hole 4b of the shutter 4, so that the cassette 1
As the shutter 4 is discharged, the shutter 4 moves in the closing direction,
As a result, the shutter 4 is brought to the closed position, and the elastic locking piece 5 is engaged with the first hole 4a of the shutter 4. When the cassette 1 is further ejected after the shutter 4 is closed, the second arm 9d of the ejection lever 9 is moved to the shutter control lever 1.
Shutter control lever 1 contacts pin 12b of 2.
2 counterclockwise, both levers 9, 12
returns to the position indicated by the two-dot chain line in FIG. 1, and the cassette 1 can be taken out smoothly without any resistance.

[Effect of idea]

As described in detail above, according to the present invention, the shutter control lever is interlocked with the ejection lever, which has a very simple structure with a small number of parts, and allows reliable shutter control operation, and also eliminates the feeling of resistance when removing the cassette. However, it has a remarkable practical effect of being easy to operate.

[Brief explanation of the drawing]

Figures 1 and 2 relate to one embodiment of the present invention; Figure 1 is a plan view of the main part, Figure 2 is a simplified side view of the main part, and Figures 3 and 4 are for an electronic still camera. FIG. 2 is a plan view and a side view of a video floppy disk. 1...cassette, 2...magnetic disk, 3...
Head window, 4...Shutter, 4a...1st
hole, 4b...second hole, 5...elastic locking piece, 6
...Groove, 8...Cassette storage body, 9...Ejection lever, 9b...Pin, 11...Ejection spring, 12...
Shutter control lever, 12a... engaging portion, 14...
...Shutter control lever spring, 15...Shutter release pin, 16...Lock mechanism.

Claims (1)

[Scope of Claim for Utility Model Registration] A cassette containing a flexible magnetic disk, a shutter that can be slid along one side of the cassette to close or open a head window, and a shutter provided on the side end surface of the shutter. A first hole that can be engaged with an elastic locking piece built into the cassette when the shutter is in the closed state, and a second hole provided on the side end surface of the shutter that allows the shutter to be opened and closed. A device for driving a video floppy disk, which is adapted to engage a shutter control member during transition from a closed position to a closed position, comprising: a cassette for guiding and holding an inserted cassette; a storage body, an ejection lever that rotates when pressed against an end face of a cassette inserted into the cassette storage body, an ejection spring that constantly applies rotational force to the ejection lever in the cassette ejection direction, and the second hole. a shutter control lever that is rotatably held and has an engaging portion that can be engaged with the shutter control lever, and a rotational force is constantly applied to the shutter control lever in a direction in which the engaging portion engages with the second hole. an engagement spring, and when the cassette is not inserted into the cassette storage body, the ejection lever moves the shutter control lever in a direction in which the engagement portion thereof moves away from the second hole. Displaces and locks against the spring,
In the middle of inserting the cassette into the cassette storage body, the ejection lever rotated to a predetermined position unlocks the shutter control lever and causes the engaging portion to engage with the second hole. magnetic disk drive device.