JPH0433586Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a disk device in which a disk cassette in which a disk, such as a disk-shaped magnetic disk, is rotatably housed within the cassette body is mounted.

[Conventional technology]

2. Description of the Related Art Conventionally, a disk apparatus has been used which records and reproduces information signals using a disk cassette in which a disk such as a magnetic disk in the form of a disk sheet is rotatably housed within a cassette body. This disk device has a built-in cassette mounting mechanism that allows the disk cassette to be mounted on a turntable of a disk rotation drive mechanism that rotates the disk contained in the cassette body.

The cassette mounting mechanism used in this disk device is such that when a disk cassette is inserted into a cassette holder through a cassette insertion/ejection port, the cassette holder descends to press and hold the disk cassette on positioning pins, and also holds the disk cassette on positioning pins. is configured to be mounted on a turntable.

Further, when the eject operation plate is pressed, the pressure bonding by the cassette holder is released, the disk cassette is floated above the positioning pin, and is ejected to the outside of the apparatus through the cassette insertion/ejection port.

By the way, regarding the above cassette mounting mechanism,
In order to prevent the disk cassette from being sharply protruded from the cassette holder and falling out from the cassette insertion/ejection opening when ejecting, it is possible to grasp a disk cassette that is in the middle of being ejected and a portion of the disk cassette is protruding from the cassette insertion/ejection opening. A brake lever or other means to prevent the brake lever from falling off is provided to stop the brake lever at a fixed position.

However, the means for preventing a disk cassette from falling off provided in a conventional disk device is such that the recording/reproducing opening of the moving disk cassette is provided and the shutter presses a part of the flat surface of the moving cassette body to prevent the disk cassette from falling off. Since the cassette body is constructed to prevent scratches from occurring, the flat surface of the cassette body, which has a large surface area and is easily noticeable, is scratched by sliding contact with the pressing means.

[The problem that the idea attempts to solve]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a disk device that can prevent damage such as scratches from occurring on the large and easily visible portion of the disk cassette when the disk cassette is ejected. It was proposed for this purpose.

[Means to solve the problem]

In order to achieve the above-mentioned object, a disk device according to the present invention has a disk rotatably housed therein, and has a recording/reproducing opening in a plane from which a head for recording/reproducing information to/from the disk faces. ,
a cassette holder for inserting and holding a disk cassette and having a shutter for opening and closing the opening; a shutter opening/closing lever that engages with the shutter to move the shutter to an open position in which the opening is open; and a biasing means that biases the shutter opening/closing lever in a direction in which the disk cassette is ejected from the cassette holder. , having a pressed portion pressed by the shutter opening/closing lever when the disk cassette is ejected from the cassette holder on one end side, and one side surface perpendicular to the plane of the disk cassette ejected from the cassette holder on the other end side; and a cassette pressing arm rotatably provided on the cassette holder.

[Effect]

In the disk device according to the present invention, when the disk cassette is ejected, the abutting portion provided on the cassette pressing arm abuts one side of the disk cassette perpendicular to the plane, and the abutting portion slides against the plane. To avoid.

〔Example〕

Hereinafter, specific embodiments of a disk device to which the present invention is applied will be described with reference to the drawings.

First, a disk cassette installed in a disk device to which the present invention is applied will be explained.

As shown in FIGS. 7 and 8, this disk cassette 1 has a magnetic disk 3 in the form of a disc sheet rotatably housed within a cassette main body 2 formed by butt-joining upper and lower halves 2a and 2b. ing. A center disk 4 made of a metal plate is fixed to the center of the magnetic disk 3. A center hole 5 is bored in the center of the center disk 4, and a drive pin insertion hole 6 is located at a position eccentric to the center hole 5.
is drilled. Note that the center hole 5 is formed in a square shape, and the drive pin insertion hole 6 is formed in a rectangular shape. The center disk 4 is loosely fitted into the turntable insertion hole 7 provided in the center of the lower half 2b, with the magnetic disk 3 contained within the cassette body 2.

Further, in the upper and lower planes of the cassette body 2, recording/reproducing openings 8, 8 are provided which allow the signal recording area of the magnetic disk 3 to be exposed outward in the radial direction. These recording/reproducing openings 8, 8 are connected to a shutter 9 movably attached to the cassette body 2.
It is opened and closed by. Furthermore, positioning pin engagement holes 10, 10 are formed in the lower half 2b constituting the lower plane of the cassette body 2. These positioning pin engagement holes 10, 10 are provided so as to be located on both sides of the shutter 9 attached to the cassette body 2.

Further, on one side of the front side of the cassette main body 2, which is the side where the shutter 9 is attached, there is a slope that functions to determine the insertion direction when the cassette is inserted into the cassette mounting mechanism described later and to prevent incorrect insertion. A surface 1b is formed.

A cassette mounting mechanism for mounting and operating the thus configured dice cassette 1 into a disk device is located on a turntable 12 supported via a chassis 11, as shown in FIG. Become.

In addition, on the upper surface side of the turntable 12 on which the magnetic disk 3 is placed, there is a center pin 1 located at the center of rotation and engaged with a center hole 5 formed in the center disk 4.
A drive pin 14 is provided at a position eccentric to the center pin 13 to engage with a drive pin insertion hole 6 formed in the center disk 4.
The magnetic disk 3 is mounted on the turntable 12 by engaging the center pin 13 and the drive pin 14 with the center hole 5 and the drive pin insertion hole 6, respectively, which are formed in the center disc 4. It is rotated integrally with the turntable 12.

The cassette loading mechanism is mounted on both sides of a chassis 11 disposed in a disk device in which a magnetic head for recording and reproducing information signals on the magnetic disk 3 and a feeding device for this magnetic head are disposed. A pair of side plates 1 installed parallel to each other
5, 15 and between these side plates 15, 15,
An eject plate 16 is slidably disposed on the chassis 11, and a cassette holder 17 is provided on the eject plate 16 to hold an insertion space for the disk cassette 1.

The side plates 15, 15 are fixed to the chassis 11 with screws 19 via bent pieces 18.
Guide pins 2 protruding from both sides of the rear side of the cassette crimp plate 17 are provided on the inner sides of these side plates 15, 15.
Slide guide grooves 2 that 0 and 21 engage with, respectively.
Guide pieces 23, 23 each having a shape of 2 are planted.

The ejection plate 16 has elongated holes 24, 24 drilled in pairs on both sides, through which four support pins 25, 25 planted on the chassis 11 are inserted, respectively.
It is arranged on the chassis 11 so as to be slidable within the range of the elongated holes 24, 24. A cutout recess 26 is formed in the center of the ejection plate 16 and opens at the rear side of the inside of the device from which the turntable 15 is projected. Also, on both sides of the eject plate 16, there are disk cassettes 1
During the eject operation and when the disk cassette 1 can be inserted, the cassette holder 17 disposed on the eject plate 16 is supported at the floating position, and the cassette holder 1
Inclined cam surfaces 27a, 2 for floating the disk cassette 1 to the floating position from a state where the disk cassette 1 is pressed and held.
Cam plates 27, 2 forming 8a, 29a, 30a
8, 29, and 30 are formed in pairs each rising up. Furthermore, the eject plate 16 is moved forward in the direction of the second middle arrow A, which is the insertion opening side of the disk cassette 1, by a spring 31 stretched between one side of the eject plate 16 and one side plate 15. energized. Further, on one side of the front side of the eject plate 16, an operation button mounting portion 33 to which an eject operation button 32 is attached is formed by bending.
A lock pin 36 fitted with a roller 35 is protruded from the lower surface of the rear side of the eject plate 16, which is slidably supported on the chassis 11 and biased to move by the spring 31. . When the eject plate 16 is in the eject position, this lock pin 36 is rotatable via a pivot 39 on a support shaft 38 that is set up on a mounting piece 37 that is bent and connected from one side plate 15. It engages with the pivoted lock lever 40 and locks the eject plate 16 at the eject position against the biasing force of the spring 31. The lock lever 40 is wound around the pivot portion 39 and rotated in the clockwise direction in FIG. energized. Incidentally, a rotation operation pin 42 is installed in the middle of the lock lever 40 and is bent by the inserted disk cassette 1.

The cassette holder 17 is formed into a rectangular flat plate having approximately the same size as the plane of the disk cassette 1, and has a U-shaped cross section on both sides to hold and guide both sides of the disk cassette 1 to be inserted. The slide guide portions 45, 45 each having a shape are bent. The cassette holder 17 has front guide pins 46 and 47 protruding from both sides of the cassette holder 17 along with the rear guide pins 20 and 21 mentioned above. These guide pins 20, 21, 46, 4
7 are attached so as to correspond to cam plates 27, 28, 29, and 30 provided on the eject plate 17, respectively, when the cassette holder 17 is attached on the eject plate 17. Further, on one side of the cassette holder 17, protrusions 48 and 49 for pressing the disk cassette 1 are formed to bulge out toward the lower surface side. Further, an inclined guide surface 50 is formed on the front edge side to guide the inserted disk cassette 1. And this cassette holder 17
The guide pins 20 and 21 on the inner side are connected to the guide piece 2.
3 and 23, respectively, and each guide pin 20, 21 and 46,
47 to the cam plate 27 of the eject plate 16,
It is disposed on the eject plate 16 so as to be placed on the ejector plates 28, 29, and 30. The cassette holder 17 disposed on the eject plate 16 in this way
and a compression spring 51 between each side plate 15, 15,
52 is stretched, and this cassette holder 17 is always urged toward the chassis 11 side.

Note that the guide pins 46 and 21 of the cassette holder 17 placed on the cam plates 30 and 27 are placed opposite to the cam plates 30 and 27 on the rear side and the front side of the eject plate 16 to prevent them from coming off. Guide pin slip-off prevention pieces 53, 5 that are approximately L-shaped to
3 is planted from the eject plate 16.
Then, the cassette holder 17 and the eject plate 16
The opening 55 serves as a mounting portion for the disk cassette 1, and the front side serves as an opening 55 for inserting and removing the disk cassette 1.

On the cassette holder 17 mounted on the eject plate 16 as described above, there is a shutter of the disk cassette 1 which rotates in a direction parallel to the plane of the disk cassette 1 mounted here, that is, on the surface of the cassette holder 17. An L-shaped shutter opening/closing lever 56 for opening and closing the shutter 9 is pivotally supported. The shutter opening/closing lever 56 has its base end pivotally attached to a pivot pin 57 that is set in the cassette holder 17, and the lower end of the shutter opening/closing lever 56 protrudes from the lower surface of the cassette holder 17 to the front side of the disk cassette 1. The shutter 9 engages with the formed engagement step portion 1a.
A pressing pin 58 is provided to protrude and come into contact with one side of the holder. Further, a rotation biasing spring 59 is stretched between the cassette holder 17 and the shutter opening/closing lever 56, and the shutter opening/closing lever 56 is biased to rotate clockwise in the direction of arrow C in FIG. .

Incidentally, a guide wall 60 is formed upright on the cassette holder 17 to guide the rotation of the shutter opening/closing lever 56 along the locus along which the tip of the shutter opening/closing lever 56 rotates.

Further, on one side of the cassette holder 17 facing the front end of the shutter opening/closing lever 50, a cassette pressing arm 61 made of elastic synthetic resin or the like is rotatably supported. As shown in FIG. 1, this cassette pressing arm 61 has cassette pressing pins 62, 62 protrudingly provided on the lower surface of both ends thereof, and a pivot that is pivotally supported approximately at the center by a support pin 63 set on the cassette holder 17. A branch office 64 is established. Further, a pressed portion 66 is protruded from one end of the cassette pressing arm 61 and is pressed by coming into contact with a pressing piece 65 formed upright on one side of the distal end of the shutter opening/closing lever 56. .
Further, the pressed portion 6 is provided with the pivot portion 64 in between.
A cassette abutting portion 67 for abutting against one side of the disk cassette 1 to press and support the disk cassette 1 is provided in a hanging manner on the other end opposite to the one end on which the cassette 6 is protruded.

The cassette pressing arm 61 allows the cassette pressing pins 62, 62 to face through holes 68, 68 having a larger diameter than the pressing pins 62, 62 bored in the cassette holder 17, and also allows the cassette abutting portion 67 to The pivot portion 64 faces the notch window 69 formed on the side of the holder 17 and has a slight clearance for the support pin 63.
is pivotally mounted on the cassette holder 17. When the cassette pressing arm 61 mounted in this manner is in the ejected state in which the cassette holder 17 is floated, the pressed portion 66 is pressed by the pressing piece 65 of the shutter opening/closing lever 56, as shown in FIG. The contact portion 67 is rotated so that it enters inside the cassette holder 17. Further, the cassette pressing arm 61 has through holes 68, 68 facing the cassette pressing pins 62, 62.
Since the shutter opening/closing lever 56 only rotates within the range of , the rotational biasing position of the shutter opening/closing lever 56 is regulated by the rotational biasing spring 59. The shutter opening/closing lever 56 is connected to the cassette pressing arm 6.
When the rotational position is restricted by 1,
The pressing pin 58 is placed at a position opposite to one side of the shutter 9 which is in the opening closed position of the disk cassette 1 into which the pressing pin 58 is inserted.

Note that the shutter 11 is equipped with a turntable 12.
locating pins 69, which engage with the locating pin engagement holes 10, 10 of the disk cassette 1 mounted on the disc cassette 1;
69, and support pins 70, 70 which come into contact with the flat surface of the cassette body 2 of the disk cassette 1 are installed.

In order to insert the disk cassette 1 into the cassette mounting mechanism configured as described above through the cassette insertion/removal opening 55 and mount it on the turntable 12, the cassette holder 17 is brought into the ejected state in a floating state. Then, the disk cassette 1 is inserted into the cassette holder 17 through the cassette insertion/removal opening 55 from the front side where the shutter 9 is attached. When the disk cassette 1 is inserted halfway into the cassette holder 17, the press pin 58 at the tip of the shutter opening/closing lever 56 engages with the engagement step 1a formed on one side of the shutter 9, and comes into contact with. Here, when the disk cassette 1 is further inserted into the cassette holder 17, the opening/closing lever 5 is opened as shown in FIG.
6 is rotated counterclockwise against the biasing force of the rotation biasing spring 59, and the pressing pin 58
The shutter 9 is slid to open the recording/reproducing opening 8.

Also, the rotation operation pin 4 of the lock lever 40 that locks the eject plate 16 in the eject position
2 is pressed by the front side of the disk cassette 1 to rotate the lock lever 40 counterclockwise against the urging force of the torsion coil spring 41. By rotating the lock lever 40 in this manner, the lock pin 36 is released from the locked state, and the lock pin 36 comes into contact with the tip edge of the lock lever 40. And eject board 1
6 is slid forward in the direction of arrow A in FIG. 2 by a spring 31. Eject plate 1
6 is slid forward, the cam plate 27,
Guide pins 20, 21, 4 of the cassette holder 17 placed on the horizontal surfaces of 28, 29, 30
6, 47 are inclined cam surfaces 27a, 28a, 29
a, 30a, the cassette holder 17 slides along the compression springs 51, 30a as shown in FIG.
52, it is lowered toward the eject plate 16 side. Then, the flat surface of the upper surface of the cassette body 2 of the disk cassette 1 inserted up to the top of the turntable 12 is pressed by the projections 48, 49 and the cassette pressing pins 62, 62 of the cassette pressing arm 61, and the disk cassette 1 is pushed into the first position. As shown in FIG. 4, it is crimped onto the positioning pins 69, 69 and support pins 70, 70. At this time, the shutter opening/closing lever 56 is
As shown in FIG. 3, it is in a state separated from the cassette pressing arm 61, and the cassette pressing arm 61 is supported by the support pin 63 with a clearance. The disk cassette 1 is pressed with uniform force by changing the swing. At this time, the magnetic disk 3 in the disk cassette 1 is mounted on the turntable 12 and is rotatable within the cassette body 2.

To eject the disk cassette 1 installed as described above, press the eject operation button 32 and slide the eject plate 16 inward against the urging force of the spring 31, as shown in FIG. Guide pin 2 of cassette holder 17
0, 21, 46, 47 are inclined cam surfaces 27a, 28
cam plate 2 by sliding on a, 29a, 30a.
7, 28, 29, 30, and the cassette holder 17 is held by compression springs 51, 5.
The disk cassette 1 is moved in a direction away from the eject plate 16 against the urging force of the disk cassette 1, thereby releasing the pressure bonding of the disk cassette 1.

When the eject plate 16 is slid inward of the device as described above, the lock pin 36 engages with the lock lever 40 and is locked in the inward position of the device against the biasing force of the spring 31.

Then, when the cassette holder 17 is raised and the disk cassette 1 is released from the press-fitting state, the shutter opening/closing lever 56 is rotated by the biasing spring 59.
The disk cassette 1 is rotated in the clockwise direction by
1, and the cassette pressing arm 61 is rotated clockwise in the direction of arrow D in FIG. When the cassette pressing arm 61 is rotated in the clockwise direction, the cassette contact portion 6
7 enters into the carat holder 17 through the notched window 69, and is pushed out by the shutter opening/closing lever 56 to protrude to the outside of the apparatus through the cassette insertion/removal opening 55. The disc cassette 1 is pressed against the disc cassette 1. Then, a load is applied to the movement of the disk cassette 1 in the protruding direction to prevent the disk cassette 1 from suddenly jumping out from the cassette holder 17, and a part of the disk cassette 1 is inserted into the cassette insertion/removal opening 5.
5, and is stopped at a position where the disk cassette 1 can be grasped with fingers to prevent it from falling off.

The cassette pressing arm 61 according to the present embodiment configured as described above has an inclined surface 1b that functions to prevent erroneous insertion. do. That is, when the disk cassette 1 is inserted into the apparatus from the back side opposite to the side on which the shutter 9 is attached, where the inclined surface 1b is not formed, the cassette contact portion 67 comes into contact with the back side of the disk cassette 1. The cassette pressing arm 6
1 is prevented from rotating, and insertion into the inside of the device is prohibited.

[Effect of idea]

As described above, in the disk device according to the present invention, when the disk cassette is ejected, the contact portion provided on the cassette pressing arm comes into contact with one side surface perpendicular to the plane of the disk cassette, thereby preventing the disk cassette from jumping out abruptly. In addition to being able to reliably prevent scratches from occurring, since the abutting portion abuts one side perpendicular to the plane of the disk cassette, even if there is a scratch caused by the abutting portion, it is less noticeable. It only sticks to certain parts and protects the flat surface of the cassette where scratches are noticeable.
It is possible to prevent damage to the appearance.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing a disk device according to the present invention, and FIG. 2 is a perspective view showing the entire disk device. 3 is a plan view of the disk cassette installed, FIG. 4 is a side view thereof, FIG. 5 is a plan view of the ejected state, and FIG. 6 is a side view thereof. FIG. 7 is a perspective view from the top side of the disk cassette installed in the disk device according to the present invention, and FIG. 8 is a plan view showing the bottom side thereof. DESCRIPTION OF SYMBOLS 1...Disk cassette, 2...Cassette main body, 3...Magnetic disk, 8...Aperture for recording/reproduction, 9...Shutter, 11...Character, 16...
...Eject plate, 17...Cassette holder, 55
...Cassette insertion/ejection opening, 56...Shutter opening/closing lever, 58...Pressed part, 59...Rotation biasing spring, 61...Cassette pressing arm, 66...Pressed part, 67...Cassette contact part .

Claims (1)

[Claims for Utility Model Registration] A disk is rotatably housed therein, and has a recording/reproducing opening on a plane from which a head for recording/reproducing information is faced, and a shutter for opening and closing this opening. a cassette holder for inserting and holding a disk cassette; a cassette holder rotatably mounted on the cassette holder;
a shutter opening/closing lever that engages with the shutter of the disk cassette in response to insertion of the disk cassette into the cassette holder and moves the shutter to an open position in which the opening is opened; a biasing means for biasing the disk cassette in a direction to be ejected from the cassette holder; and a pressed portion on one end that is pressed by the shutter opening/closing lever when the disk cassette is ejected from the cassette holder; A cassette pressing arm rotatably provided on the cassette holder, the cassette pressing arm having a contact portion on the side that abuts one side perpendicular to a plane of the disk cassette discharged from the cassette holder.