JP2000268552A - Disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the hermetical closing ability and dust preventing characteristic of a cartridge inserting port. SOLUTION: A gasket 36 is attached to the outer periphery of the cartridge inserting port 13 of a front panel 12, and the arm lengths L11 and L12 of both upper and lower sides 37a and 37b clamped on both upper and lower sides 36a and 36b of the gasket 36 by the clamping portion 37 of an opening/closing door 21 to the gasket 36 are constituted almost equally to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention loads a disk cartridge containing a recording medium such as an optical disk or a magneto-optical disk and records and reproduces data such as video and audio on the recording medium. The present invention relates to a disk device, and particularly to a technical field related to a dustproof structure of a cartridge insertion opening of a front panel.

[0002]

2. Description of the Related Art Conventionally, a disk cartridge 1 as shown in FIGS. 1, 42 and 43 has been developed. The disk cartridge 1 is formed in a substantially rectangular and flat casing, and is a recording medium including an optical disk or a magneto-optical disk therein, and can record and reproduce data on both upper and lower surfaces. The double-sided disk 2 is rotatably stored. And this disk cartridge 1
Is formed on an end surface in the direction of insertion into a disk device described later. The disk cartridge 1 is formed in a vertically symmetrical shape,
b, a pair of upper and lower recesses 3 deviated to the front end surface 1a side are formed over substantially the entire width, and from the upper and lower positions corresponding to the center hole 2a of the double-sided disk 2 in the pair of upper and lower recesses 3 from the front end surface. A pair of upper and lower window holes 4 having a long hole shape are formed near the center of 1a. Then, a dustproof shutter 5 whose side surface is formed in a U-shape by a thin plate of plastic or a metal plate is inserted into a pair of upper and lower recesses 3 in a front end surface 1a.
The shutter 5 is configured to be horizontally inserted from the side and attached, and the shutter 5 is configured to be slidable to one or both along the front end surface 1a, so that the pair of upper and lower window holes 4 can be simultaneously opened and closed by the shutter 5. ing. The shutter 5 is slid from the open position shown in FIG. 43 to the closed position shown in FIG. 42 by a return spring (not shown) incorporated in the front end surface 1a of the disk cartridge 1. The front end face 5a of the shutter 5 projects forward from the left and right corners 1c of the front end face 1a of the disc cartridge 1 and the front end face of the disc cartridge 1 including the front end face 5a of the shutter 5. The central portion of 1a is forcibly the weakest portion as compared to the left and right corner portions 1c. A pair of left and right positioning holes 6 are formed at positions deviated on the rear end surface 1d side of the upper and lower side surfaces 1b of the disk cartridge 1, near the front and rear ends of the left and right side surfaces 1e of the disk cartridge 1. A pair of right and left notches 7 for the loading mechanism and notches 8 for the disc changer are formed at the respective positions.

As shown in FIGS. 44 to 46, a horizontally long opening cartridge is inserted into a front panel 12 of a disk device 11 for recording and reproducing data such as video and audio on and from a double-sided disk 2 of the disk cartridge 1. The opening 13 is formed horizontally, and a dustproof opening / closing door 14 is attached to the cartridge insertion opening 13. Normally, the opening / closing door 14 is rotatably mounted on the inside of the front panel 12 via a fulcrum shaft 15 at a position near the upper end thereof so as to be freely rotatable in the directions of arrows c and d. It has an inward opening structure that opens in the direction of arrow c, which is the inside of the front panel 12, against a (not shown). Then, as shown in FIG. 45 (A), the disc cartridge 1 is inserted into the cartridge insertion slot 13 from the front end face 1a side in the direction of arrow a, and as shown in FIGS. 45 (B) and (C), When the opening / closing door 14 is pushed open in the direction of arrow c against the return spring at the front end surface 1a, and the disc cartridge 1 is inserted horizontally into the disc device 11, the disc cartridge 1 is inserted into the disc device 11. The shutter 5 is pulled into the disk device 11 by a cartridge loading mechanism (not shown) provided in the printer, and the shutter 5 is slid to one side of the opening position to open a pair of upper and lower window holes 4. Later, the disc cartridge 1 is loaded to the cartridge mounting position, and the disc cartridge 1 is driven by a spindle motor provided inside the disc device 11. With double-sided disk 2 is rotated at a high speed I,
A pair of upper and lower optical pickups (both not shown) serving as recording and reproducing heads for a pair of upper and lower data inserted from above and below into a pair of upper and lower window holes 4 respectively.
Data such as video and audio are simultaneously or selectively recorded and reproduced on both upper and lower surfaces of the camera. After the recording and reproduction of the data is completed, as shown in FIG. 45A, when the disk cartridge 1 is removed from the cartridge insertion slot 13 to the outside of the disk device 11 in the direction of arrow b, the opening / closing door 14 is opened.
Is returned in the direction of arrow d by the return spring, and the cartridge insertion opening 13 is closed from the inside.

[0006] In the conventional disk drive 11, as shown in FIG. 46, in order to prevent foreign matter, dirt, dust and the like from entering the inside of the drive from the cartridge insertion slot 13 of the front panel 12 as much as possible, as shown in FIG.
2 outer peripheral surface 13 of the cartridge insertion opening 13 formed in
a, a flat rectangular shape surrounding the cartridge insertion opening 13 and a packing 17 made of rubber or the like are adhered, and the outer peripheral portion of the flat front surface 14a of the opening / closing door 14 is returned to the packing 17 and pressed by the spring force of a spring. Thus, the dust-proof structure of the cartridge insertion opening 13 is adopted.

[0005]

However, in the conventional dustproof structure of the cartridge insertion slot 13, the fulcrum shaft 15 of the opening / closing door 14 is disposed near the upper end of the opening / closing door 14, and the fulcrum shaft 15 and the packing are provided. Upper and lower sides 17 of 17
There is a large difference (L21 <L22) in the arm lengths L21 and L22 between a and 17b. For this reason, when the opening / closing door 14 is pressed against the packing 17 from the direction of the arrow d with the flat front surface 14a by the return spring, the pressing forces F21, F22 against the upper and lower sides 17a, 17b of the packing 17
Large difference inversely proportional to the arm lengths L21 and L22 (F2
1> F22) occurs. That is, the upper portion 1 of the packing 17 having a small arm length L21 with respect to the fulcrum shaft 15.
Although a sufficiently large crimping force F21 can be obtained at the portion 7a, the crimping force F22 becomes extremely small at the lower portion 17b of the packing 17 where the arm length L22 with respect to the fulcrum shaft 15 is large. Door 14
Floated up in the direction of arrow c, and a gap was easily generated between them, and the dustproofness (sealing property) was low. In particular, packing 1
7, the front surface 14a of the opening / closing door 14 is brought into direct contact with the inner peripheral surface 13a of the front panel 12 by a flat surface, so that the contact area between the opening / closing door 14 and the front panel 12 is limited, and The above-mentioned gap was easily generated even if the degree of irregularity or warpage occurred. The pressing force F2 of the opening / closing door 14 against the lower portion 17b of the packing 17
If the force of the return spring is increased to increase the size of the disk cartridge 2, the load when the open / close door 14 is pushed and opened by the disk cartridge 1 in the direction of arrow c increases, and the disk cartridge 1 is inserted into the disk device 11. It becomes difficult to do.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and has as its object to provide a disk drive capable of significantly increasing the sealing ability of a cartridge insertion slot.

[0007]

According to a first aspect of the present invention, there is provided a disk drive, comprising: an opening / closing door rotated to a closed position by an urging means; The pressure of the opening / closing door on the upper and lower sides of the packing when pressed against the packing is almost equal.

In the disk device of the present invention configured as described above, when the opening and closing door is closed, the opening and closing door is crimped to the upper and lower sides of the packing with substantially uniform crimping force. A gap is hardly generated between the door and the door.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a disk drive to which the present invention is applied will be described below in the following order with reference to the drawings. (1) Description of disk cartridge (2) Description of disk device (3) Description of cartridge loading mechanism (4) Description of open / close door (5) Open / close door (6) ・ ・ ・ Description of dustproof structure of cartridge insertion slot (7) ・ ・ ・ Description of optical pickup elevating mechanism

(1) Description of Disk Cartridge First, the disk cartridge 1 containing the double-sided disk 2 will be described with reference to FIGS. 1, 42 and 43. As described above, this disk cartridge 1 is almost A double-sided disk 2 which is a recording medium composed of an optical disk or a magneto-optical disk, and capable of recording and reproducing data on both upper and lower surfaces. It is stored. The front end surface 1a of the disk cartridge 1 is formed on the end surface in the direction of insertion into a disk device described later. The disk cartridge 1 is formed in a vertically symmetrical shape, and a pair of upper and lower recesses 3 deflected toward the front end face 1a on both upper and lower surfaces 1b is formed over substantially the entire width. A pair of upper and lower window holes 4 having a long hole shape are formed from a position corresponding to the upper and lower portions of the center hole 2a of the double-sided disk 2 in the concave portion 3 to a position near the center of the front end surface 1a. Then, a dustproof shutter 5 whose side surface is formed in a U-shape by a thin plate of plastic or a metal plate is horizontally inserted from the front end face 1a into the pair of upper and lower recesses 3 and attached. Is configured to be slidable to one or both sides along the front end surface 1a, so that the shutter 5 can simultaneously open and close the pair of upper and lower window holes 4. The shutter 5 is slid from the open position shown in FIG. 43 to the closed position shown in FIG. 42 by a return spring (not shown) incorporated in the front end surface 1a of the disk cartridge 1. The front end face 5a of the shutter 5 projects forward from the left and right corners 1c of the front end face 1a of the disc cartridge 1 and the front end face of the disc cartridge 1 including the front end face 5a of the shutter 5. The central portion of 1a is forcibly the weakest portion as compared to the left and right corner portions 1c. The left and right corners 1c of the front end surface 1a of the disk cartridge 1 are formed at locations where the strength is the strongest. This disk cartridge 1
A pair of left and right positioning holes 6 are formed at positions deviated to the rear end surface 1d side of the upper and lower side surfaces 1b. Notch 7 for loading mechanism
And a notch 8 for a disc changer.

In order to bring the left and right corners 1c of the front end surface 1a of the disk cartridge 1 into point contact with the front surface of an opening / closing door, which will be described later, the disk cartridge 1
The left and right corner portions 1c of the front end surface 1a of the first embodiment are formed with left-right symmetric R (R) -shaped portions 1f.

(2)... Overview of Disk Device Next, an overview of the disk device 11 will be described with reference to FIGS.
Is ideal for application to high-speed editing machines, etc.
Data such as video and audio are simultaneously recorded and reproduced on both upper and lower surfaces of the double-sided disk 2 in the disk cartridge 1, thereby realizing a higher capacity of recorded data and a higher data transfer speed.

The front panel 12 of the disk device 11 is formed of a molded component, and the front panel 12 has a horizontally long opening-shaped cartridge insertion port 13 formed therein. An eject button 20 is attached to the front panel 12 below the cartridge insertion slot 13. An opening / closing door 21 for opening / closing the cartridge insertion slot 13 from the inside is attached to the inside of the front panel 12, and a turntable 41 and a turntable 41 are provided below the opening / closing door 21 at a position rearward (position in the direction of arrow a). A spindle motor 42 for rotating the spindle motor 42 is disposed, and a chucking mechanism 43 is disposed above the turntable 41. A pair of upper and lower optical pickups 44 and 45, which are heads for simultaneously recording and reproducing data on the upper and lower surfaces of the double-sided disk 2, are disposed further behind the turntable 41 and the chucking mechanism 43. The lower optical pickup 44 is mounted upward on a lower base plate 46 together with a voice coil motor (seek mechanism) not shown, and the chucking mechanism 43 and the upper optical pickup 45 are together with a voice coil motor (seek mechanism) not shown. It is mounted downward on the lower part of the upper base plate 47.

A cartridge loading mechanism 51 is arranged at a position behind the front panel 12. The cartridge loading mechanism 51 has a cartridge retraction position in which a cartridge holder 52 laid horizontally between the lower base plate 46 and the upper base plate 47 is approached from the rear to the cartridge insertion slot 13 in the direction of arrow b. Between the loading start position retracted horizontally in the direction of the arrow a, and the arrows a and b, which are the front and rear directions, and between the loading start position and the loading completion position disposed below the same. Arrows e, f that are up and down between
It is configured to drive up and down in parallel to the direction. The upper and lower base plates 46 and 47 are driven by the cartridge loading mechanism 51 on the left and right sides thereof to move the upper base plate 47 in the vertical direction indicated by an arrow e,
An elevating mechanism 71 that moves up and down in parallel with the f direction is arranged.

Therefore, this disk device 11 is
As shown in FIG. 31, the disc cartridge 1 is inserted horizontally from the front end face 1a side into the cartridge insertion slot 13 in the direction of the arrow a, and while the door 21 is pushed and opened in the direction of the arrow c, the disc cartridge 1 is Insert the cartridge holder 52 in the direction of arrow a. Then, the shutter 5 shown in FIG. 42 of the disc cartridge 1 is moved one side from the closed position shown in FIG. 42 to the open position shown in FIG. 43 by the shutter opening / closing mechanism (not shown) attached to the cartridge holder 52. And the upper and lower window holes 4 of the disk cartridge 1 are simultaneously opened. When the insertion of the disc cartridge 1 into the cartridge holder 52 is completed,
A pair of left and right latch means (not shown) attached to the cartridge holder 52 are engaged with a pair of left and right notches 7 shown in FIG.
The disk cartridge 1 is inserted into the cartridge holder 5
2 is mechanically retained within.

When the completion of the insertion of the disc cartridge 1 into the cartridge holder 52 is detected by the sensor, the cartridge loading mechanism 51 is operated, and the disc cartridge 1 is moved from the cartridge retracted position shown in FIG. It is drawn horizontally in the direction of arrow a to the loading start position shown in FIG. 32, and at that loading start position,
Center hole 2 of double-sided disk 2 in disk cartridge 1
a is disposed directly above the turntable 41, and a pair of upper and lower window holes 4 is disposed between a pair of upper and lower optical pickups 44 and 45. Then, the cartridge holder 52 is continuously lowered in the direction of arrow e from the loading start position to the loading completion position shown in FIG. 33, and the disc cartridge 1 is horizontally loaded on the lower base plate 46, and positioning pins (not shown) are used. Z). When the loading of the disc cartridge 1 is completed, the lower base plate 46
Upper turntable 41 and upper optical pickup 44
Is relatively inserted into the lower window hole 4 of the disc cartridge 1 from below, and the double-sided disc 2 is mounted horizontally on the turntable 41 by the center hole 2a.
The lower surface of the double-sided disk 2 is
Closed up.

Then, in synchronization with this cartridge loading operation, the lifting mechanism 71 is driven by the cartridge loading mechanism 51, and the upper base plate 4
7 is lowered parallel to the direction of arrow e from the raised position shown in FIGS. 31 and 32 to the lowered position shown in FIG. And
The chucking mechanism 43 and the upper optical pickup 45 are inserted into the upper window hole 4 of the disk cartridge 1 from above, and the double-sided disk 2 is accurately chucked and fixed on the turntable 41 by the chucking mechanism 43. At the same time, the upper optical pickup 45 is brought close to the upper surface of the double-sided disc 2, and the cartridge loading operation is completed. At this time, the upper base plate 47 is positioned on the lower base plate 46 by positioning pins (not shown), and the disk cartridge 1 is pressed down from above and fixed.

After the completion of the cartridge loading, while the double-sided disk 2 is rotated at a high speed integrally with the turntable 41 by the spindle motor 42, a pair of upper and lower optical pickups 44 and 45 form images and images on the upper and lower surfaces of the double-sided disk 1. Data such as voice is simultaneously recorded and reproduced.

After the recording and reproduction of the data, the eject button 20 on the front panel 12 is pressed. When an eject command signal is output from the host computer, the cartridge loading mechanism 51 and the lifting mechanism 7
1 is driven, and the reverse stroke of the loading operation is performed. That is, the upper base plate 47 is raised in parallel with the arrow f direction from the lowered position in FIG. 33 to the raised position in FIG.
After the disc cartridge 5 is pulled out above the disc cartridge 1 and the disc cartridge 1 is raised by the cartridge holder 52 from the loading completion position in FIG. 33 to the loading start position in FIG. It is pushed horizontally in the direction of arrow b to the position. At the moment when the cartridge holder 52 reaches the cartridge retraction position, the disc cartridge 1 is stored in the cartridge holder 52.
Is released from the pair of notches 7 and the shutter opening / closing mechanism moves the disk cartridge 1 outward from the cartridge insertion slot 13 by an arrow b.
The shutter 5 is slid and returned from the open position of FIG. 43 to the closed position of FIG. 42 while ejecting in the direction.

When loading the disk cartridge 1, the disk cartridge 1 is inserted into the cartridge slot 13 in the direction of arrow a as shown in FIG. After pushing open in the direction of arrow c with 1,
When the loading of the disc cartridge 1 is completed in the directions of arrows a and c to the loading completion position shown in FIG. 33 via the loading start position shown in FIG. 32, the opening / closing door 21 is automatically closed in the direction of arrow d to insert the cartridge. A door opening / closing mechanism 81 which will be described later is provided so as to secure a dustproof effect during recording and reproduction of data on the double-sided disk 2 by closing the opening 13 from the inside. When the disk cartridge 1 is ejected, the door opening / closing mechanism 81 moves in the direction of arrow c while the disk cartridge 1 is lifted in the direction of arrow f from the loading completion position in FIG. 33 to the loading start position in FIG.
The disk cartridge 1 is automatically opened in the direction, and the disc cartridge 1 can be ejected from the cartridge insertion slot 13 in the direction of arrow b.

Further, in the disk device 11, the loading of the disk cartridge 1 to the loading completed position shown in FIG. 33 from the direction of arrow c is completed, and the opening / closing door 21 closed in the direction of arrow d is mechanically locked from the inside. This allows another disc cartridge 1 to be inserted into the cartridge insertion slot 13 while recording and reproducing data on the double-sided disc 2.
Cartridge 1 that is accidentally inserted from
A lid opening prohibiting means 91 described later is provided to realize double insertion prevention and the like.

(3) Description of the Cartridge Loading Mechanism Next, the cartridge loading mechanism 51 will be described with reference to FIGS. 27 to 41. The cartridge loading mechanism 51 is fixed parallel to the left and right sides of the lower base plate 71 in parallel. The left and right side plates 53 are vertically raised upright, and the vertical left and right slide plates 54 attached in parallel to the left and right sides of the left and right side plates 53 are provided. A pair of front and rear horizontal guide grooves 55 formed in the left and right side plates 53 and a pair of front and rear horizontal members fixed to the inside of the left and right slide plates 54 and slidably engaged in these horizontal guide grooves 55. The left and right slide plates 54 are guided by a horizontal guide mechanism 57 composed of the guide pins 56 so as to be slidable along the left and right side plates 53 in the forward and backward directions of arrows a and b.

The cartridge holder 52 is formed in a rectangular and flat casing having an opening 52a formed on the front panel 12 side. The cartridge holder 52 is mounted on the front panel 12 side between the left and right side plates 53. It is arranged horizontally at the position of the deviation. A pair of front and rear L-shaped guide grooves 58 formed in the left and right side plates 53 and a pair of front and rear cam grooves 59 formed in the left and right slide plates 54 are fixed to the left and right side surfaces of the cartridge holder. A pair of front and rear guide pins 6 slidably inserted into the intersection of the L-shaped guide groove 58 and the cam groove 59.
The cartridge holder 52 is configured to be moved in parallel in the directions of arrows a and b and the directions of arrows e and f between the left and right side plates 53 by the slide cam mechanism 61 constituted by 0. As shown in FIG. 40, the L-shaped guide groove 58 has a shape in which a vertical portion 58a is connected downward from the rear end of the horizontal portion 58a, and the cam groove 59 has a horizontal portion extending forward from the front end of the inclined portion 59a. 59a are connected.

A pair of right and left gear trains 63, which are synchronously driven by one small drive motor 62, are attached to the left and right sides of the lower end of the left and right side plates 53, respectively. A pair of left and right pinions 64 disposed at the output end of the
Left and right racks 6 formed horizontally along the lower end of the
5 is engaged.

Accordingly, the cartridge loading mechanism 51 simultaneously rotates the left and right pinions 64 alternately in both the forward and reverse directions via both the left and right gear trains 63 by one drive motor 62, so that the left and right pinions 64 are rotated by the same drive motor 62. The left and right racks 65 are driven in both forward and reverse directions, and the left and right slide plates 54 are moved in the forward and rearward directions along a pair of front and rear horizontal guide grooves 55 of the left and right side plates 53,
The slide drive can be performed simultaneously in the b direction. When the left and right slide plates 54 are simultaneously slid in the directions of the arrows a and b, the cams formed by the cam grooves 59 of the pair of front and rear slide cam mechanisms 61 provided between the left and right sides of the cartridge holder 52. By the action, the guide pin 60 is moved in the horizontal direction (arrows a and b) along the L-shaped guide groove 58 and in the vertical direction (arrows e and f).
The cartridge holder is slid along the movement path of the mold, and the cartridge
It can be slid along an L-shaped movement trajectory from a loading start position → a loading completion position and a loading completion position → a loading start position → a cartridge retraction position.

(4)... Description of the opening and closing door Next, referring to FIGS. 1 to 4 and FIGS.
First, as shown in FIGS. 1 to 4, this opening / closing door 21 is formed in an oblong shape by aluminum die casting, a molded part, or the like, and a disk cartridge is provided at the center of a front surface 21a. A recess 22 for escape with respect to the front end face 5a of the shutter 5 is formed, and the left and right sides of the recess 22 are substantially cam-shaped in the form of a contact portion of a corner portion 1c and a cartridge contact portion. Are formed. A pair of left and right arms 24 are formed at right and left ends of the back surface 21b of the opening / closing door 21 so as to be integrally formed at right angles, and between the pair of left and right arms 24, the back surface 21b of the opening / closing door 21 is formed. A pair of left and right guide projections 25, which also serve as a pair of left and right reinforcing ribs, are integrally formed at right angles. An inclined surface 25a is formed at the lower end of the rear surface of each of the left and right guide projections 25. On the front surface of the pair of left and right convex portions 23 of the opening / closing door 21, an R-shaped portion 26 that is curved along the vertical height direction is formed. The R-shaped portion 26 is provided with an opening / closing door 21 described later.
Is formed to have a curvature approximating a radius centered on the rotation fulcrum O. The inside of the concave portion 22 is formed as a flat display surface 21c on the front surface 21a, and the display surface 21c has an OP
A display 27 such as a TICAL DISC and other various characters and symbols is provided. The entire surface of the concave portion 22 and the left and right convex portions 23 of the opening / closing door 21 is subjected to alumite treatment or coating with a transparent resin paint for preventing damage and improving slipperiness.

The cartridge insertion opening 13 of the front panel 12 is a flat rectangular cylinder integrally formed inside the front panel 12, and gradually narrows backward (in the direction of arrow a). The cartridge opening is formed in a cartridge insertion opening outer peripheral wall 28 having a shape. Then, a pair of left and right vertical slits 29 that can be inserted into the rear ends of the vertical left and right side edges 28 c of the cartridge insertion port outer peripheral wall 28 are formed at the left and right intermediate positions of the left and right convex portions 23 of the opening and closing door 21. ing.

As shown in FIGS. 6 to 12, inside the front panel 12, a pair of left and right opening / closing door mounting plates 31 made of a sheet metal or the like is provided vertically on both left and right positions of the cartridge insertion slot 13. The left and right arms 24 of the open / close door 21 are inserted between the left and right open / close door mounting plates 31 so that the rear ends of the left and right arms 24 are attached. Left and right openable door mounting plates 31 via a pair of concentric, horizontal left and right fulcrum shafts 32
Are mounted rotatably in the directions of arrows c and d between the upper end portions of the.

At this time, as shown in FIG. 10, the coordinates of the rotation center O, which is the center of the pair of left and right fulcrum shafts 32, are lower than the center position P1 of the cartridge insertion slot 13 in the vertical direction by a predetermined dimension L11. P2, and a predetermined length L from the cartridge insertion slot 13 to the rear side (the direction of the arrow a).
The position P3 is set to the position P3 retracted by 12. Accordingly, the opening / closing door 21 is configured to be rotatable in the directions of arrows c and d toward the rear and upward of the cartridge insertion slot 13 around the rotation fulcrum O. A pair of left and right spring locking portions 30 integrally formed at upper positions of both right and left ends of the opening / closing door 21 and a pair of left and right spring locking portions 33 formed on the left and right opening / closing door mounting plates 31. The open / close door 21 is rotationally urged in the direction of the arrow d, which is the closing direction, by a pair of left and right tension coil springs 34 serving as rotational urging means (return springs), respectively, and the left and right open / close door mounting plates 31.
A pair of left and right stoppers 35 formed on the front side of the upper end of the
The left and right arm portions 24 are contacted from above in the direction of arrow d,
The closing position of the opening / closing door 21 is regulated. In addition,
When the opening / closing door 21 is returned to the lid closing position in the direction of arrow d,
The pair of left and right slits 29 are inserted into the left and right side edges 28c of the cartridge insertion port outer peripheral wall 28.

The opening / closing door 21 is constructed as described above, and as shown in FIGS.
4 is inserted horizontally from the front end face 1a side into the cartridge insertion slot 13 of the disk device 11 in the direction of arrow a, and the opening / closing door 21 is opposed to the left and right extension coil springs 34 in FIGS. ), The front end face 5a of the shutter 5 of the disc cartridge 1 does not collide with the front face 21a of the opening / closing door 21 at all when the push is opened in the direction of arrow c around the rotation fulcrum O to the open position. The opening and closing door 21 can be pushed open safely and smoothly.

That is, when the disc cartridge 1 is inserted, the shutter 5 is positioned at the closed position set at the center of the disc cartridge 1 in the left-right width direction by the return spring incorporated therein.
Insert this disc cartridge 1 into the cartridge insertion slot 13
When the shutter 5 is inserted horizontally from the direction of arrow a, the front end face 5a of the shutter 5 is opened and closed as shown in FIGS.
1 and the left and right corners 1c of the front end surface 1a of the disc cartridge 1
3 is brought into contact with the left and right convex portions 23 in the direction of the arrow a, and between the front end surface 5a of the shutter 5 and the display surface 21c in the concave portion 22 of the opening / closing door 21 as shown in FIG. The occurrence of the gap G shown and the contact of the front end face 5a with the display surface 21c is avoided.

Accordingly, the front end face 1a of the disc cartridge 1 including the front end face 5a of the shutter 5 which is the weakest in strength.
A large load is not applied to the center of the disk cartridge 1 at all, and the open / close door 21 is opposed to the left and right tension coil springs 34 by the right and left corners 1c at the front end surface 1a of the disk cartridge 1 at the strongest left and right corners 1c. In addition to being able to be pushed open strongly in the direction c, the front end face 5a of the shutter 5 which is the weakest when the disc cartridge 1 is inserted.
The central portion of the front end surface 1a of the disc cartridge 1 including the above may be damaged by a large load, or the front end surface 5a of the shutter 5 may directly contact the display surface 21c of the opening / closing door 21 and the like. The front and rear corners 1c of the front end surface 1a of the disc cartridge 1 are the strongest without damaging the surface 27 of the display surface 21c at all.
Thus, the opening / closing door 21 can be safely and strongly pushed open in the direction of arrow c.

In addition, at this time, an R-shaped portion 26 is formed on the front surface of each of the left and right convex portions 23 of the opening / closing door 21, and the left and right corner portions 1 of the front end surface 1a of the disc cartridge 1 are formed.
Since the left and right corners 1c are also contacted with the left and right convex portions 23 from the direction of the arrow a, the contact portions have contact resistance (frictional resistance). ) Is the smallest point contact state. Therefore,
The sliding load on the disk cartridge 1 of the opening / closing door 21 rotated in the direction of arrow c with respect to the disk cartridge 1 inserted in the direction of arrow a is minimized, and the pressing force of the disk cartridge 1 in the direction of arrow a is reduced. The rotation force in the direction of the arrow c can be converted without difficulty, and the opening / closing door 21 can be pushed and opened smoothly in the direction of the arrow c (it can be rotated lightly with a weak force). At this time, the right and left R-shaped portions 26 of the opening / closing door 21 are rotated about
Since it is formed to a curvature approximating the radius around the center,
The opening / closing door 21 can easily escape from the left and right corners 1c of the disk cartridge 1 in the direction of arrow c, and the opening / closing door 21 can be pushed and opened more smoothly in the direction of arrow c. FIG. 4C shows a state in which the opening / closing door 21 is safely pushed and opened in the direction of the arrow c by the disk cartridge 1 inserted in the direction of the arrow a. The cartridge 1 is moved between the left and right arms 24 of the opening / closing door 21 so that the opening / closing door 21
Of the disk cartridge 1 on the upper surface 1b of the disc cartridge 1. Therefore, this disk cartridge 1
During the insertion, the front end face 5a of the shutter 5 is not brought into contact with the opening / closing door 21 to the end. Then, as described above, when the disk cartridge 1 is inserted into the cartridge holder 52, the shutter 5 is opened. At that time, the opening / closing door 21 is already on the upper surface 1b of the disk cartridge 1. Therefore, there is no danger that the shutter 5 will come into contact with the opening / closing door 21 even when the shutter 5 is opened.

Therefore, it is not necessary to set the concave portion 22 of the opening / closing door 21 to be large over the entire sliding width of the shutter 5 between the closed position and the opened position.
When the disc cartridge 1 is inserted into the disc cartridge 3 in the direction of arrow a, a recess 22 is formed in a portion corresponding to the width of the shutter 5 which is positioned at the center of the disc cartridge 1 in the left-right width direction and escapes from the front end face 5a. Just do it. When the left and right corners 1c are formed on flat surfaces parallel to the front end surface 1a without forming the R-shaped portions 1f at the left and right corner portions 1c of the front end surface 1a of the disk cartridge 1, When the cartridge is inserted into the cartridge insertion slot 13 from the direction of arrow a, the flat surfaces of the left and right corners 1c thereof come into line contact with the R-shaped portions 26 of the left and right convex portions 23 of the opening / closing door 21. . In this line contact state, although the contact resistance (friction resistance) is slightly larger than the point contact state described above, the contact state is greatly reduced as compared with the surface contact state. Even in the line contact state, the opening / closing door 21 can be pushed and opened smoothly in the direction of the arrow c almost in the same manner as in the point contact state.

In FIG. 5, a pair of left and right fulcrum shafts 32 of the opening / closing door 21 are arranged near the upper end of the opening / closing door 21 in the same manner as in the conventional example shown in FIGS. This shows a modification in which the opening / closing door 21 is pushed and opened in the direction of arrow c.
2. If the left and right convex portions 23 and the R-shaped portion 26 are formed, the opening / closing door 21 of the disk cartridge 1 can be safely and smoothly pushed open by the disk cartridge 1 as described above.

(5) Description of opening / closing mechanism of opening / closing door Next, referring to FIGS.
A door opening / closing mechanism 81 which is an opening / closing mechanism for opening / closing the opening / closing door 21 at the time of loading and ejecting of the door 21 will be described. The door opening / closing mechanism 81 includes a disc cartridge 1, a pair of left and right guide projections 25 of the opening / closing door 21,
It is constituted by a pair of left and right tension coil springs 34 as rotation urging means. That is, as shown in FIGS. 10 and 15A, when loading the disk cartridge 1, the disk cartridge 1 is moved to its front end surface 1a.
As shown in FIGS. 15B and 15C, the opening / closing door 21 is opened by the disc cartridge 1 against the left and right tension coil springs 34 as shown in FIGS. Push open in the c direction,
As shown in FIG. 13, the disc cartridge 1 passes between the left and right arms 24 of the opening / closing door 21 and passes through the arrow a.
When the opening / closing door 21 is completely pushed open in the direction of arrow c, the lower ends 23 a of the left and right convex portions 23 of the opening / closing door 21
You will get on top.

Then, as shown in FIG. 16A, when the disk cartridge 1 is inserted in the direction of arrow c, the disk cartridge 1 is horizontally moved from the direction of arrow a into the cartridge holder 52 described with reference to FIG. And the disk cartridge 1 is mechanically held in the cartridge holder 52 by the latch means. Then, as described with reference to FIG. 32, when the disk cartridge 1 is pulled in the direction of the arrow a from the cartridge retraction position to the loading start position by the cartridge holder 52, as shown in FIG. 32 and FIG. Then, the rear end face 1d of the disk cartridge 1 is completely drawn in the direction of arrow a from the cartridge insertion slot 13, and
d passes through the lower ends 23a of the left and right convex portions 23 of the opening and closing door 21 in the direction of the arrow a, and is stopped below the left and right guide projections 25. The left and right guide projections 25 of the opening / closing door 21
Is placed on the upper surface 1b on the rear end surface 1d side of the disk cartridge 1 by the inclined surface 25a.

Thereafter, as described with reference to FIG. 34, when the disk cartridge 1 is horizontally lowered in the direction of arrow e from the loading start position to the loading completion position by the cartridge holder 52, as shown in FIG. 11 and FIG. C) As shown in FIG.
Upper surface 1b is separated in the direction of arrow c from the slopes 25a of the left and right guide projections 25 of the opening / closing door 21 (the contact is cut off).
Is done. Then, the opening / closing door 21 is rotated in the direction of arrow d by the left and right tension coil springs 34 to the closed position,
As shown in FIGS. 10 to 12 and 16, the cartridge insertion slot 13 is automatically closed by the opening / closing door 21.

After the loading of the disc cartridge 1 is completed, as described with reference to FIG. 33, when the upper base plate 47 is lowered in the direction of arrow e to the lowered position, one point is shown in FIG. 11 and FIG. As shown by the dashed line, the opening prohibiting means 91, which is the lower end portion of the front side of the upper base plate 47, is connected to the left and right arm portions 2 of the opening / closing door 21.
4 is inserted from the direction of arrow e into a position near the rear part of the vertical shape part 24a formed at the rear end edge. Then, after this,
Even if the door 21 is rotated in the direction of arrow c to open it,
Since the vertical shape portions 24a of the left and right arm portions 24 hit the lid opening prohibiting means 91, the opening and closing door 21 cannot be opened in the direction of arrow c, and the opening and closing door 21 is mechanically locked from the inside. become.

Therefore, as described with reference to FIG. 34, during recording and reproduction of data on the double-sided disc 2, double disc insertion of the disc cartridge 1 may be erroneously inserted from the cartridge insertion slot 13. Can be prevented beforehand. However, this double insertion prevention mechanism is constituted by the cover opening prohibiting means 91 formed at the front lower end edge portion of the upper base plate 47 and the vertical shape portion 24a formed at the rear end edges of the left and right arms 24 of the opening / closing door 21. So the structure is very simple.

Next, when the disc cartridge 1 is ejected, as shown in FIG. 34, the upper base plate 47 is raised from the lowered position to the raised position in parallel in the direction of the arrow f, so that (FIG. 11 and FIG. 17). As shown by a two-dot chain line in FIG.
And rises in the direction of arrow f, which is upward, from the vertical shape portion 24a. Then, in synchronization with this, when the disk cartridge 1 is raised by the cartridge holder 52 from the loading completion position to the loading start position in parallel in the direction of arrow f, FIGS. 14 and 17B
As shown in (C), the upper surface 1b on the rear end surface 1d side of the disc cartridge 1 is
5 is pushed up in the direction of the arrow f by being brought into contact with (being in contact with) the inclined surface 25a of FIG. 5, and as shown in FIG. 14 and FIG. The cartridge is automatically rotated in the direction of arrow c to the open position to open the cartridge insertion slot 13 automatically. Thereafter, as described with reference to FIG. 35, when the disk cartridge 1 is horizontally moved in the direction of arrow b from the loading start position to the cartridge retraction position by the cartridge holder 52, as shown in FIG. Then, the disk cartridge 1 is ejected from the rear end face 1d side to the outside of the cartridge insertion slot 13 of the cartridge insertion slot 13 in the direction of arrow b. Then, as shown in FIGS. 10 and 18B, when the disk cartridge 1 is completely pulled out from the inside of the cartridge holder 52 to the outside of the cartridge insertion slot 13 in the direction of arrow b, the open / close door 21 opens the left and right tension coil springs 34. As a result, the cartridge is rotated in the direction of arrow d to the open position, and the cartridge insertion slot 13 is closed again.

As described above, this door opening / closing mechanism 81 connects the opening / closing door 21 to the cartridge loading mechanism 51.
The opening / closing door 21 can be opened and closed smoothly and automatically in synchronization with the loading and ejecting operations of the disk cartridge 1 irrespective of the fact that the opening / closing door 21 is not mechanically linked. The structure is very simple, and cost reduction can be realized by reducing the number of parts and the number of assembly steps. Yet, in particular, FIG.
As described in 4, the data of the double-sided disk 2 is recorded,
During reproduction, as shown in FIG.
Since the cartridge insertion slot 13 can be reliably closed from the inside by 1, foreign matter, dust, dust, and the like unexpectedly enter the disc device 11 from the cartridge insertion slot 13 during recording and reproduction of the data. In addition, it is possible to prevent dust or the like from adhering to the double-sided disk 2 and causing a decrease in output due to spacing loss.

FIG. 19 and FIG.
This is a modified example in which a pair of left and right rollers 82 and 83 are rotatably attached to the lower end of both left and right convex portions 23 and the inclined surface 25a of both left and right guide projections 25.
If the opening and closing door 83 is attached to the opening / closing door 21, the disk cartridge 1 can be opened and closed horizontally in the directions of arrows a and b below the opening and closing door 21 with the opening and closing door 21 being pushed open in the direction of arrow c. Also, at the time of ejection, the opening / closing door 21 is moved with the disk cartridge 1 by an arrow c.
The contact resistance (frictional resistance) between the disc cartridge 1 and the opening / closing door 21 when the disc cartridge 1 is pushed and opened in the direction can be significantly reduced. Can be performed smoothly.

(6) Description of the dustproof structure of the cartridge insertion port Next, referring to FIGS.
The dustproof structure of FIG. 3 will be described. First, as described with reference to FIG. And is set at a position P3 which is set back from the cartridge insertion slot 13 rearward (toward the direction of the arrow a) by a predetermined dimension L12. Therefore, as shown in FIG. 24, the upper and lower horizontal edges 28a,
8b and a packing 36 formed in a flat rectangular closed loop shape by an elastic member such as rubber or soft plastic is attached to the rear end surfaces of the right and left side edges 28c by bonding or the like, and the packing 36 is attached to the front surface of the opening / closing door 21. To form a flat rectangular closed loop crimping portion 37 which is crimped over the entire circumference of. The upper and lower sides 37a of the crimping portion 37 are formed horizontally above and below the recess 22 and the upper and lower sides 37c are formed in a pair of right and left vertical slits 29.

Then, the arm lengths L13, L14 of the horizontal left and right side portions 37a, 37b of the crimping portion 37 of the opening / closing door 21 from the rotation fulcrum O are substantially equal, and as shown in FIG. When the entire periphery of the crimping portion 37 is crimped to the entire periphery of the packing 36 from the direction of arrow d by rotating the pair of left and right tension coil springs 34 to the lid closing position in the direction of arrow d, The pressing force F11, F12 of the upper and lower side portions 37a, 37b of the pressing portion 37 against the upper and lower side portions 36a, 36b becomes substantially equal.

As a result, no gap is produced between the packing 36 and the crimping portion 37 over the entire circumference thereof.
The ability of the opening / closing door 21 to seal the cartridge insertion opening 13 is greatly improved, and the dustproof characteristics of the disk device 11 can be greatly improved. Then, the cartridge insertion slot 1
Because the sealing ability of 3 can be greatly improved,
The spring force of the left and right tension coil springs 34 for returning the opening / closing door 21 in the direction of arrow d can be made sufficiently small.
When pushing 1 in the direction of arrow c against both left and right tension coil springs 34, it can be pushed and opened easily with a small force.

In other words, FIG.
This shows a conventional example of a dustproof structure. In this conventional example, the cartridge insertion port 13 is formed on the inner peripheral surface 13a of the cartridge insertion port 13 formed in the front panel 12.
And a packing 17 made of rubber or the like is adhered, and the outer peripheral portion of the flat front surface 14a of the opening / closing door 14 is returned to the packing 17 and pressed by the spring force of a spring.

However, the fulcrum shaft 15 of the opening / closing door 14 is arranged near the upper end of the opening / closing door 21, and the arm lengths L21, L22 between the fulcrum shaft 15 and the upper and lower sides 17a, 17b of the packing 17 are provided. Large difference (L21 <L
22) has occurred. Therefore, the opening / closing door 14 is moved to the packing 17 by the return spring by the flat front surface 14a and the arrow d.
Upper and lower sides 17 of packing 17 when crimped from the direction
The arm length L is applied to the crimping forces F21 and F22 for the a and 17b.
21, a large difference inversely proportional to L22 (F21> F22)
Will occur. That is, although a sufficiently large crimping force F21 is obtained in the upper portion 17b of the packing 17 having a small arm length L21 with respect to the fulcrum shaft 15, the fulcrum shaft 1
The crimping force F21 is extremely small at the lower portion 17a of the packing 17 having a large arm length L22 with respect to 5, and the opening / closing door 14 rises in the direction of arrow c with respect to the lower portion 17b, and Gaps tended to occur, and the dust-proofing (sealing) was low. In particular, without using the packing 17, the front surface 14a of the
In the case where the inner peripheral surface 13a is directly in contact with the inner peripheral surface 13a between the flat panel surfaces, the contact area between the opening and closing door 14 and the front panel 12 is limited, and the above-mentioned gap is easily generated even by a slight deviation in flatness or warpage. Was. If the force of the return spring is increased in order to increase the pressing force F22 of the opening / closing door 14 against the lower portion 17b of the packing 17, the load when the disk cartridge 1 pushes the opening / closing door 14 in the direction of arrow c is opened. However, there is a problem that it becomes difficult to insert the disk cartridge 1 into the disk device 11.

However, as in the dustproof structure of the present invention, the arm lengths L13 and L14 are configured to be substantially equal, and the pressing force F1
1, if the F12 is configured substantially evenly, the above-mentioned disadvantages of the conventional dustproof structure can be completely eliminated.

As described above, the arm lengths L13, L
14 are configured to be substantially equal and the crimping forces F11 and F12 are configured to be substantially equal, for example, by removing the packing 36,
As shown in FIG. 10, an R-shaped receiving surface 28 in which an R-shaped portion 26 of the opening / closing door 21 is formed on an outer peripheral wall 28 of the cartridge insertion port.
d, it is difficult to generate a gap in the entire circumference between the R-shaped portion 26 and the R-shaped receiving surface 28d, and the cartridge insertion port 1
3 can greatly improve the sealing ability and dustproof characteristics.

FIG. 25 shows a modification of the dustproof structure of the cartridge insertion slot 13. In this case, FIG.
Upper and lower sides 37a, 37b of the crimping portion 37 of the opening / closing door 21
The arm lengths L13, L14 for the rotation fulcrum O are substantially equal, and the upper and lower sides 37a, 37b are pressed against the upper and lower sides 36a, 36b of the packing 36 from the tangential direction of an imaginary circle centered on the rotation fulcrum O. It is configured as follows. With this configuration, the rotational urging force of the opening / closing door 21 in the direction of arrow d by the left and right tension coil springs 34 applies the pressing force F11 of the upper and lower side portions 37a, 37b of the pressing portion 37 to the upper and lower side portions 36a, 36b of the packing 36,
F12 can be converted to almost 100%, and the sealing ability and dustproof property of the cartridge insertion slot 13 can be further improved. Note that the arm length L13 = L
With the configuration 14, the compression force F11 = F12, and the sealing ability and dustproof property of the cartridge insertion slot 13 are further improved.

FIG. 11 shows another modified example of the dustproof structure of the cartridge insertion slot 13, in which the upper and lower sides 37a, 37b of the crimping portion 37 with respect to the upper and lower sides 36a, 36b of the packing 36 are shown. Although the pressing directions are different, the arm lengths L13 and L14 of the upper and lower side portions 37a and 37b from the rotation fulcrum O are substantially equal to each other, so that the sealing ability and the dustproof property of the cartridge insertion slot 13 are greatly improved. Things.

(7) Description of the mechanism for raising and lowering the optical pickup Next, referring to FIGS. 27 to 41, the upper optical pickup 45, which is the upper head, is moved up and down by the upper base plate 47 in the directions of arrows e and f, which are the upper and lower directions. To describe the lifting mechanism 71 to be driven, the upper base plate 47 is horizontally disposed between the left and right side plates 53, and a pair of front and rear guide pins 72 horizontally mounted on the left and right side surfaces of the upper base plate 47 is provided. A pair of front and rear vertical guide grooves 73 formed in the left and right side plates 53 and a pair of front and rear slide cam grooves 74 formed in the left and right slide plates 54 and formed as substantially Z-shaped guide grooves are slidable at intersections. 4 pairs of cam mechanism 75
Is provided. As shown in FIG. 40, the cam groove 74 is formed by an inclined portion 74b that extends obliquely forward and downward from the front end of the upper horizontal portion 74a and a lower horizontal portion 74c that extends rearward from the front end of the inclined portion 74b. It has a substantially Z-shape.

Therefore, at the time of cartridge loading, as described above, the cartridge loading mechanism 5
1 and the left and right slide plates 54 are moved from the forward position shown in FIG. 31 by one drive motor 62 via the left and right gear trains 63, the pinions 64 and the rack 65 from FIG.
3 is simultaneously slid in the direction of the arrow a to the retreat position shown in FIG. 3, and the cartridge holder 52 is horizontally pulled in the direction of the arrow a from the cartridge retraction position shown in FIG. 31 to the loading start position shown in FIG. When lowering the upper base plate 47 from the loading start position to the loading completion position in parallel with the arrow e direction from the rising position shown in FIG. 31 and FIG. 32 to the lowering position shown in FIG. be able to.

That is, first, before the loading operation is started, as shown in FIG.
The fifth guide pin 72 is located at the rear end (the end in the direction of the arrow a) of the upper horizontal portion 74a of the cam groove 74. Then, while the left and right slide plates 54 are simultaneously slid in the direction of arrow a and the cartridge holder 52 is horizontally pulled in the direction of arrow a from the cartridge retracted position shown in FIG. 31 to the loading start position shown in FIG.
As shown in FIG. 33, the guide pin 72 of each slide cam mechanism 75 is relatively slid in the direction of arrow b from the rear end of the upper horizontal portion 74a of the cam groove 74 to the front end (the end in the direction of arrow b). And the upper base plate 47 is kept waiting at the raised position.

Then, both left and right slide plates 54 are simultaneously slid in the direction of arrow a, and the cartridge holder 52 is lowered from the loading start position shown in FIG. 32 to the loading completed position shown in FIG. At this time, as shown in FIG. 33, the guide pin 72 of each slide cam mechanism 75 is
4b, the upper base plate 47 is driven downward in the direction of arrow e from the upper end to the lower end of the vertical guide groove 73 from the upper position shown in FIG. 32 to the lower position shown in FIG. The guide pin 72 reaches the lower horizontal portion 74c of the cam groove 74.

At the time of ejecting the cartridge, contrary to the loading of the cartridge, the left and right slide plates 54 are slid in the direction of arrow b from the retracted position shown in FIG. 33 to the advanced position shown in FIG. The guide pin 72 is driven to rise in the direction of arrow f from the lower end to the upper end of the vertical guide groove 73 by the cam groove 74 of each slide cam mechanism 75, and the upper base plate 47 is moved from the lowered position shown in FIG. 33 to the raised position shown in FIG. It is raised parallel to the direction of arrow f. Then, slightly after the upward movement of the upper base plate 47, the cartridge holder 52 is moved from the loading completion position shown in FIG.
After being raised in parallel to the arrow f direction to the loading start position shown in FIG. 4, only the cartridge holder 52 is moved to the cartridge retraction position in FIG.
It is configured to be moved horizontally in the direction.

Incidentally, the upper optical pickup 45 is mounted on the upper base plate 47 together with the voice coil motor (seek mechanism), and the load on the upper base plate 47 is considerably large. Therefore,
A total of four tension coil springs 76 as elastic suspension means
Thus, four front and rear, left and right corner portions 47a of the upper base plate 47 are elastically suspended above the front and rear ends of the left and right side plates 53, thereby making it possible to reduce the size of the drive motor 62 and to eliminate the damper.

Here, considering the adverse effect of the load on the upper base plate 47 acting on the cam groove 74 of each slide cam mechanism 75, first, FIGS. 36, 37 and 40 show that the upper base plate 47 is lowered from the raised position to the lowered position. Considering the case of driving, the load F of the upper base plate 47 acting on the guide pin 72 of each slide cam mechanism 75 is distributed to the component forces F1 and F2, and the cam groove 74 is moved by the component force F1 to the left and right slide plates. 54 is to be slid in the direction of arrow G. Accordingly, when the upper base plate 47 is driven to descend by the cartridge loading mechanism 51 in the direction indicated by the arrow e, the moving speed of the left and right slide plates 54 in the direction indicated by the arrow a is reduced by the weight of the upper base plate 47 due to the component force F1 applied to the cam groove 74. Is accelerated by the force of G generated by this, and the lowering speed of the upper base plate 47 in the direction of arrow e is accelerated. Therefore,
When the load on the upper base plate 47 is large and the resulting G force is large, a large impact is generated when the upper base plate 47 lowered in the direction of arrow e to the lowered position is positioned on the lower base plate 46. As a result, there is a risk that not only the mechanical system such as the cartridge loading mechanism 51 but also the upper and lower optical pickups 44 and 45, the chucking mechanism 43, the double-sided disk 2 and the like may be damaged by the large impact.

However, since the upper base plate 47 is suspended elastically by the force H by the four tension coil springs 76, the load F of the upper base plate 47 becomes four.
The force H of the tension coil spring 76 apparently decreases (FH), that is, cancels, and this G
The power is greatly reduced. Therefore, the upper base plate 47 having a large load can be safely lowered in the direction of arrow e to the lowering position at a safe speed. When the cartridge holder 52 is slid in the directions of the arrows a and b between the cartridge retraction position and the cartridge loading start position by the left and right slide plates 54, the four tension coil springs 76 Since the driving force of the cartridge holder 52 is not affected, the slide driving of the cartridge holder 52 in the directions of the arrows a and b can be performed smoothly.

Next, FIGS. 38, 39 and 41 show a case where the upper base plate 47 is driven to move upward from the lower position to the upper position.
The load F21 of the upper base plate 47 acting on the fifth guide pin 72 is dispersed into the component forces F1 and F2 as described above, and the cam groove 74 tries to slide the left and right slide plates 54 in the direction of arrow G by the component force F1. Therefore, the left and right slide plates 54 are generated by a force K2 that generates a force K larger than the component force F1.
Is not driven in the direction of arrow b, the upper base plate 4
No force K1 capable of driving the actuator 7 upward in the direction of arrow f is generated. Therefore, the upper base plate 47
Is large, the force F1 increases, and a large driving force is required to raise the upper base plate 47 in the direction of arrow f.
Is required.

However, since the upper base plate 47 is elastically suspended by the four tension coil springs 76 with the force H, and the force H acts in the opposite direction of the load F, the load F of the upper base plate 47 is reduced. Apparently reduced by the force H of the four tension coil springs 76 (FH),
That is, the G force is canceled, and the G force is greatly reduced. Therefore, even if a small motor is used as the drive motor 62, the lower base plate 47 with a large load can be smoothly raised in the direction of the arrow f to the raised position.

In the conventional cartridge loading mechanism, a so-called one-handed type oil / mechanical damper that works only when the upper base plate 47 is lowered for the purpose of reducing the adverse effect on the drive system due to the load when the upper base plate 47 is lowered. Is incorporated in the gear train 63. However, like the cartridge loading mechanism 51 of the disk drive 11 of the present invention, the cartridge holder 52 is driven horizontally in the directions of arrows a and b and vertically driven in the directions of arrows e and f. When the upper base plate 47 is driven vertically in the directions of arrows e and f in conjunction with the driving, that is, it requires horizontal driving in the forward and reverse directions. In this case, the damper function also acts, and the load on the driving force changes in the forward and reverse directions. If occurs. Also, the oil mechanical damper has a problem that the unit cost of parts is higher than that of the tension coil spring 76 applied to the elastic suspension means, and parts troubles such as oil leakage and mechanical damage are likely to occur. The tension coil spring 76 can easily select the damper force according to its type and size.
In the case of a mechanical damper, there is also a problem that the range of selection is very narrow. When the load on the upper base plate 47 is heavy, there is a method of reducing the inclination angle of the cam groove 74, but the movement stroke of the left and right slide plates 54 becomes large, and the time for loading and ejecting becomes long. The increase in the movement stroke causes the size of the disk device 11 to increase. Further, in order to obtain a large driving force, a large driving motor 62 may be used. However, the unit price of the motor 62 is increased, and a large load is easily applied to both the left and right slide plates 54 and each cam mechanism 75. Is likely to be damaged, and the reliability is deteriorated.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made based on the technical concept of the present invention.

[0065]

The disk device of the present invention configured as described above has the following effects.

According to the first aspect of the present invention, when the opening / closing door is closed, the opening / closing door is crimped to the upper and lower sides of the packing with substantially equal crimping force, so that a gap or the like is formed between the packing and the opening / closing door. Since it is hardly generated, the sealing ability and dustproof property of the cartridge insertion opening can be greatly improved.

According to a second aspect of the present invention, when the opening and closing door is closed, the upper and lower sides of the crimping portion of the opening and closing door which are crimped to the upper and lower sides of the disk cartridge are set at substantially the same distance from the rotation fulcrum. Even in a set in which packing is not attached to the outer periphery of the insertion slot, the sealing ability and dustproof property of the cartridge insertion slot can be significantly improved.

According to a third aspect of the present invention, when the open / close door is closed, the upper and lower sides of the crimping portion of the open / close door which is crimped on the upper and lower sides of the packing are set at substantially the same distance from the rotation fulcrum. The sealing ability of the cartridge insertion port and the dustproof property can be greatly improved.

According to a fourth aspect of the present invention, when the opening and closing door is closed, the upper and lower sides of the crimping portion of the opening and closing crimped to the upper and lower sides of the packing are crimped substantially from the rotation direction of the opening and closing door. By making full use of the spring force of the rotation urging means of the opening and closing door, the adhesion of the opening and closing door to the packing can be improved, and the sealing ability of the cartridge insertion opening and the dustproof characteristics can be greatly improved. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view of a disk cartridge and an opening / closing door for explaining an embodiment to which the present invention is applied.

FIG. 2 is a front view of the opening / closing door and a plan view of the opening / closing door and a disk cartridge.

FIG. 3 is an enlarged sectional side view taken along the line AA of FIG. 2 and FIG.
It is an expanded sectional side view as seen from arrow B.

FIG. 4 is a partially cutaway side view for explaining a manner in which the opening / closing door is pushed open to the inside of the cartridge insertion slot by the disk cartridge.

FIG. 5 is a partially cutaway side view for explaining a push-open operation of a modification of the above-mentioned opening / closing door.

FIG. 6 is a partially cutaway plan view of a cartridge insertion portion of the disk device to which the opening / closing door is attached.

FIG. 7 is a partially cutaway side view of FIG. 6;

FIG. 8 is a partially cutaway plan view showing an enlarged right end of the opening / closing door of FIG. 6;

FIG. 9 is a partially cutaway plan view showing a left end of the opening / closing door of FIG. 6 in an enlarged manner.

FIG. 10 is an enlarged sectional side view as viewed in the direction of arrows CC in FIG. 8;

FIG. 11 is an enlarged cross-sectional side view taken along the line DD in FIG. 8;

FIG. 12 is an enlarged cross-sectional side view taken along the line EE in FIG. 8;

FIG. 13 is a partially cutaway side view for explaining that the opening / closing door rides on the disk cartridge when the disk cartridge is inserted.

FIG. 14 is a partially cutaway side view for explaining the opening / closing operation of the opening / closing door by the disk cartridge.

FIG. 15 is a partially cutaway side view illustrating the loading operation of the disk cartridge and the opening / closing operation of the associated opening / closing door.

FIG. 16 is a partially cutaway side view for explaining the above operation following FIG. 15;

FIG. 17 is a partially cutaway side view for explaining an ejecting operation of the disk cartridge and an opening / closing operation of an opening / closing door related thereto.

FIG. 18 is a partially cutaway side view for explaining the above operation following FIG. 17;

FIG. 19 is a partially cutaway side view showing a modified example in which a roller is attached to a contact portion of the opening / closing door with a disk cartridge.

FIG. 20 is a partially cutaway side view showing another modified example in which a roller is attached to another contact portion of the opening / closing door with a disk cartridge.

FIG. 21 is a front view of a front panel illustrating a dustproof structure of a cartridge insertion slot.

FIG. 22 is a rear view of the cartridge insertion slot for explaining the dustproof structure of the above.

FIG. 23 is a front view of a packing and an opening / closing door for explaining the dustproof structure.

FIG. 24 is a cross-sectional side view illustrating the dustproof structure according to the embodiment.

FIG. 25 is a cross-sectional side view illustrating a modification of the above dustproof structure.

FIG. 26 is a front view of the disk device.

FIG. 27 is a partially cutaway plan view showing a disk cartridge insertion start state of the disk device.

FIG. 28 is a front view in which the loading of the disk cartridge of the disk device is completed.

FIG. 29 is a plan view seen through a loading completion state of a disk cartridge of the disk device.

FIG. 30 is a perspective view schematically showing a state in which an upper base plate in a disk device is suspended by four tension coil springs.

FIG. 31 is a side view of the state where the insertion of the disk cartridge has been started through the cartridge loading mechanism and the elevating mechanism in the disk device.

FIG. 32 is a side view of the state in which the loading of the disk cartridge has been completed through the cartridge loading mechanism and the elevating mechanism in the disk device.

FIG. 33 is a side view of the state in which the loading of the disk cartridge is completed, as seen through the cartridge loading mechanism and the elevating mechanism in the disk device.

FIG. 34 is a side view of the disk cartridge in an ejection start state, with the cartridge loading mechanism and the elevating mechanism in the disk device being seen through.

FIG. 35 is a side view of the disk cartridge in a state where the ejection is completed, as seen through the cartridge loading mechanism and the elevating mechanism in the disk device.

FIG. 36 is a side view corresponding to FIG. 32 in which the lifting mechanism of the upper base plate in the disk device is seen through;

FIG. 37 is a front view corresponding to FIG. 32 in which the lifting mechanism of the upper base plate in the disk device is seen through;

FIG. 38 is a side view corresponding to FIG. 33, showing a perspective view of an elevating mechanism of an upper base plate in the disk device.

FIG. 39 is a front view corresponding to FIG. 33, showing the raising / lowering mechanism of the upper base plate in the disk device.

FIG. 40 is a side view for explaining the function of a tension coil spring when the upper base plate in the elevating mechanism is driven to descend.

FIG. 41 is a side view for explaining the function of a tension coil spring when the upper base plate of the lifting mechanism is driven to rise.

FIG. 42 is a plan view of a disk cartridge containing a double-sided disk in a shutter closed state.

FIG. 43 is a plan view of the disk cartridge with the shutter lid open.

FIG. 44 is a plan view for explaining the relationship between a conventional openable door and a disk cartridge.

FIG. 45 is a partially cut-away side view for explaining a conventional push-open operation of an opening / closing door by a disk cartridge.

FIG. 46 is a cross-sectional side view illustrating a dust-proof structure of a conventional cartridge insertion opening.

[Description of Signs] 1 is a disk cartridge, 11 is a disk device, 12
Is a front panel, 13 is a cartridge insertion opening, 21 is an opening / closing door, 34 is a tension coil spring as a rotation biasing means, 36 is packing, 36a and 36b are upper and lower sides of the packing, 37 is a crimping portion, and 37a and 37b are crimping. O is the center of rotation, L11 and L12 are arm lengths representing distances, and F11 and F12 are crimping forces.

Claims (4)

[Claims] 1. A disk device having an opening / closing door for opening and closing a cartridge insertion slot formed on a front panel from inside, and wherein the opening / closing door is pushed inward and opened by a disk cartridge inserted into the cartridge insertion slot. In the above, a packing surrounding the outer periphery of the cartridge insertion opening is attached to the front panel, and the opening / closing door is rotated to a closed position by a biasing means and is pressed against the packing to open and close the upper and lower sides of the packing. Characterized in that the pressure force of the disk device is substantially equal. 2. A disk drive having an opening and closing door for opening and closing a cartridge insertion opening formed in a front panel from inside, and wherein the opening and closing door is pushed inward by a disk cartridge inserted into the cartridge insertion opening. In the above, when the opening / closing door is rotated to the lid closing position by a biasing means around a rotation fulcrum, the opening / closing door is provided on the front surface of the opening / closing door and crimped to the upper and lower sides of the cartridge insertion port inside the front panel. A disk device characterized in that both upper and lower sides of the crimping portion are set at substantially the same distance from the rotation fulcrum. 3. A disk drive having an opening / closing door for opening and closing a cartridge insertion opening formed on a front panel from inside, and wherein the opening / closing door is pushed inward and opened by a disk cartridge inserted into the cartridge insertion opening. In the above, a packing surrounding the outer periphery of the cartridge insertion slot is attached to the inside of the front panel, and when the opening / closing door is rotated to a closed position by a biasing means about a rotation fulcrum, the packing is attached to the outer periphery of the front surface of the opening / closing door. A disk device, wherein upper and lower sides of a crimping portion formed and set at substantially the same distance from the rotation fulcrum are pressed against upper and lower sides of the packing. 4. A disk drive having an opening and closing door for opening and closing a cartridge insertion opening formed on a front panel from inside, and wherein the opening and closing door is pushed inward and opened by a disk cartridge inserted into the cartridge insertion opening. In the above, a packing surrounding the outer periphery of the cartridge insertion slot is attached to the inside of the front panel, and when the opening / closing door is rotated to a closed position by a biasing means around a rotation fulcrum, the packing is attached to the outer periphery of the front surface of the opening / closing door. A disk characterized in that upper and lower sides of a crimping portion formed and set at substantially the same distance with respect to the rotation fulcrum are pressed against upper and lower sides of the packing from substantially the direction of rotation of the opening and closing door. apparatus.