JPH05325372A - Disk cartridge loading device - Google Patents

Abstract

PURPOSE:To drastically reduce the number of parts to reduce cost and to simplify the whole of the device by constituting a cartridge holder and a loading slider so that they are freely vertically moved with respect to a main slider. CONSTITUTION:The disk cartridge loading device is constituted so that the cartridge holder 40 and the loading slider 50 are freely vertically moved with respect to the main slider 20 by the reciprocating movement of the slider 20. Besides, a disk cartridge 70 can be surely and smoothly loaded or ejected by executing an unloading action. Therefore, the need of an energizing means such as an extension coil spring which energizes respective members or a lock means such as a lock lever which locks the respective members in the conventional manner is eliminated. Thus, the number of parts can be drastically reduced to reduce cost. Besides, the structure of the whole of the device can be simplified, made light in weight and miniaturized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge loading device for loading and ejecting (unloading) a disc cartridge containing a recordable and reproducible disc such as a magneto-optical disc.

[0002]

2. Description of the Related Art For example, a magnetization reversal portion (recording bit) is formed by heating a minute region on a magnetic film having a direction of easy magnetization perpendicular to the film surface and a large coercive force, and a magneto-optical effect is produced. Magneto-optical recording (magnet) for reproduction by utilizing
A small-sized magneto-optical disk using an optical recording method is known. The magneto-optical disk is housed in a disk cartridge composed of upper and lower halves for convenience of carrying and handling, and recording and reproduction can be performed by loading the disk cartridge at a predetermined mounting position by a disk cartridge loading device. A disk cartridge loading device for loading or ejecting this disk cartridge will be described in detail with reference to FIG. 7. In FIG. 7, reference numeral 100 denotes a disk cartridge loading device. An eject plate 104 is provided on a chassis 101 of this disk cartridge loading device so as to be reciprocally slidable in the front-rear direction via a pair of guide pins 102, 102 and 103, 103 standing on both front and rear sides thereof. is there. This eject board 104
A pair of inclined cam grooves 104a, 10 formed on both sides of the
A cartridge holder 110 for holding the disk cartridge 200 is provided at 4a so as to be movable up and down. Then, with the disc cartridge 200 inserted and held in the cartridge holder 110, the eject plate 1
When 04 is moved forward to the side of the optical pickup 106 located in the center of the chassis 101, the cartridge holder 110 is lowered, and the chucking hub 202 of the magneto-optical disc 201 capable of recording and reproducing in the disc cartridge 200 is magnetized to the turntable 107. It is chucked and loading is completed. When the loading is completed, the eject plate 104 is provided on the chassis 101 with the torsion coil spring 1
It is locked by a lock lever 109 supported via 08 or the like.

On the upper side of the cartridge holder 110, a shutter opening / closing lever 111 for opening / closing the shutter 203 of the disk cartridge 200 and a disk cartridge erroneous insertion detection lever 112 are pulled to pull the coil spring 11.
It is arranged through 3 or the like. Further, the chassis 10
1 on the left rear side, the rear side 1 of the optical pickup 106
A plunger 116 which is attached to the 06a side and swings up and down a support arm 115 to which a flying magnetic head 114 is fixed at the tip is provided, and a rear portion on the right side of the plunger 116 is located at the rear of one side of the eject plate 104. An eject drive motor 117 for pressing the edge 104b to forcibly return the eject plate 104 to eject, a reduction gear group 118, and an eject gear 119 are provided. Then, when the eject plate 104 moves back on the chassis 101 by the pulling force of the eject drive motor 117 and the pair of tension coil springs 105, 105 interposed between the chassis 101 and the eject plate 104, the cartridge holder 110 moves to the front side. The disk cartridge 200 held by the cartridge holder 110 by unloading and unloading is ejected (note that this similar structure is, for example, the actual flat plate 3-98).
745).

[0004]

However, in the above-mentioned conventional disc cartridge loading apparatus 100, the tension coil spring 105, the torsion coil spring 108, and the tension coil spring 108 are used to urge the eject plate 104, the lock lever 109 thereof, and the shutter opening / closing lever 111. Since a plurality of biasing means such as 113 are required, the number of parts is increased correspondingly, and the structure of the entire apparatus is complicated and large and heavy. Also, the magnetic head 1
Since a plurality of drive sources such as a plunger 116 for vertically swinging the support arm 115 fixing 14 and a motor 117 for forcibly ejecting the eject plate 104 are required, the number of parts also increases from this point. However, the configuration of the entire device becomes complicated, resulting in a large size, a large weight, and a high cost.

Therefore, the present invention provides a disc cartridge loading device capable of significantly reducing the number of parts and capable of reliably and smoothly loading or ejecting a disc cartridge with a simple structure.

[0006]

A main slider slidably supported on a chassis and a vertically movable slider between both side portions of the main slider for inserting a disk cartridge between both side portions, A cartridge holder that holds the cartridge holder, and a loading slider that is slidably supported with respect to the cartridge holder and has a side portion with a claw portion that engages and disengages with an engaging concave portion of the disk cartridge inserted into the cartridge holder. The disk cartridge inserted into the cartridge holder and engaged with the claw portion of the loading slider is retracted by the reciprocating sliding movement of the loading slider to be ejectable, and the reciprocating sliding movement of the main slider causes the cartridge holder, Place the loading slider against the main slider. It is constituted to freely move up and down Te.

Further, a protrusion is provided inside at least one side of the cartridge holder to open and close the shutter of the disc cartridge, and the disc cartridge is inserted into the side of the loading slider behind the protrusion. A completion detection switch is provided.

Further, a protrusion is provided outside at least one side of the cartridge holder, and an eject completion detecting switch is provided outside the side of the loading slider facing the protrusion.

[0009]

The disk cartridge is surely and smoothly loaded and ejected at a predetermined position by the simple structure including the main slider, the cartridge holder and the loading slider. Therefore, unlike the prior art, there is no need for an urging means for urging each member or a locking means for locking each member, the number of parts is greatly reduced and the cost is reduced, and the structure of the entire device is reduced. It is simple, lightweight, compact and thin.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

1 to 5, reference numeral 1 is a disk cartridge loading device, which is small (diameter 64 mm).
Loading / unloading (ejecting) the disk cartridge 70 containing the magneto-optical disk 71 of
It is what makes them. A turntable 3 is rotatably supported at the center of a rectangular metal plate-shaped chassis 2 of the disc cartridge loading device 1 via a drive shaft 4 of a motor. From the center of the chassis 2 to the chassis 2
A substantially rectangular notch 2b is formed so as to extend to the right side 2a depending on the right edge in the figure. The slide guide shaft 5 and the feed screw 6 are provided on the lower side of the chassis 2 facing the cutout portion 2b.
The optical pickup 7 is reciprocally movable along the radial direction of the magneto-optical disk 71 mounted on the turntable 3 via the. As shown in FIG. 2, a lower portion of a support plate 8 having a substantially U-shaped side surface is fixed to a rear portion of the lower surface of the optical pickup 7. An intermediate portion 10a of an L-shaped support arm 10 is supported by a pair of holes 8a, 8a formed in the upper portion of the support plate 8 via a support shaft 9 so as to be vertically swingable. The gimbal 11 attached to the tip portion 10b of the support arm 10 has a cutout portion 2 of the chassis 2.
It extends above b. A flying magnetic head 12 as an external magnetic field generating means is attached to the gimbal 11 so as to face the objective lens 7a of the optical pickup 7. In addition, the lower end portion 10c of the support arm 10
A shaft 13 extending to the right side 2a side of the chassis 2 is attached to this. A torsion coil spring 14 that constantly urges the tip end portion 10b of the support arm 10 upward is interposed between the support shaft 9 supporting the midway portion 10a of the support arm 10 and the lower portion of the support arm 10. ..

Also, on the chassis 2, the right side portion 2 is provided.
A pair of guide pins 18, 18 are provided so as to project in the front-rear direction so as to be parallel to a, and a pair of guide pins 18 extend in the front-rear direction so as to be parallel to the left side portion 2c depending on the left end edge of the chassis 2. Guide pins 19, 19 are provided so as to project. Each of the pair of guide pins 18, 18 has a head 18a formed in an inverted conical shape and a shaft 18b formed in a cylindrical shape, and also serves as a positioning pin when the loading operation of the disk cartridge 70 is completed. ing. Further, the pair of guide pins 19 and 19 have a flat head portion.
It is shaped like a letter. A main slider 20 made of a metal plate is supported on the chassis 2 through the pair of guide pins 18, 18 and 19, 19 so as to be reciprocally slidable in a front-rear direction by a predetermined distance (for example, one way about 7 mm). There is.

The main slider 20 has a bottom portion 21 and
A pair of side portions 22 and 22 which are vertically formed integrally from both sides of the bottom portion 21 are formed in a generally square front shape. The bottom portion 21 of the main slider 20 is formed with a pair of groove holes 21a, 21a and 21b, 21b into which the pair of guide pins 18, 18 and 19, 19 are inserted. Further, a substantially rectangular notch 21c is formed at a position of the bottom portion 21 of the main slider 20 facing the notch 2b of the chassis 2. This main slider 2
The front and rear sides of both side portions 22, 22 of 0 have a pair of cam groove holes 22a, 22a formed so as to gradually rise from the front side to the rear side. The center of the right side portion 22 of the main slider 20 is integrally bent so that the horizontal piece 22b projects outward. A rectangular plate-shaped rack 23 is attached to the rear side of the horizontal piece 22b so as to be horizontal by screws, and a pair of protrusions 22c and 22d are integrally bent at front and rear corners. Has been formed.

The tooth portion 23a formed on the front side of the outer edge portion of the rack 23 is an intermittent gear portion 24a above the drive gear 24.
Meshes with. The drive gear 24 is used for the chassis 2
Shaft 1 to the sub-chassis 15 screwed to the right side 2a of the
It is rotatably supported via 6. Further, the lower gear portion 24b of the drive gear 24 includes four reduction gears 25-
Motor 29 fixed to the sub-chassis 15 via 28
Of the worm gear 30. The main slider 20 reciprocates in the front-rear direction on the chassis 2 by the rotation (forward or reverse rotation) of the motor 29.

Further, as shown in FIG.
A hole-shaped cam groove 2 having three step portions A to C on the rear side.
3b is formed. The rack 2 is provided in the cam groove 23b.
On the chassis 2 below 3, a pin 32 of a substantially triangular cam 31 pivotally supported by a pivot pin 31a is loosely fitted. A pin 33 is projectingly provided on the top of the cam 31 on the main slider 20 side. The pin 33 is pierced and pivotally attached to the chassis 2 adjacent to the rack 23 at a substantially central portion of a synthetic resin slide plate 35 which is slidably supported by a pin 34 in the front-rear direction. A recess 35a is formed on the lower surface of the rear side of the slide plate 35. The shaft 13 pivotally supported by the lower end 10c of the support arm 10 is loosely fitted in the recess 35a. When the main slider 20 reciprocally slides, the rack 23 also reciprocates in the front-rear direction, whereby the tip end 10b side of the support arm 10 swings vertically in three steps. That is, the pin 3 of the cam 31
When 2 is at the step A of the cam groove 23b of the rack 23, the magnetic head 12 attached to the tip side of the support arm 10 is at the standby position (eject position) farthest from the objective lens 7a of the optical pickup 7. Further, when the pin 32 of the cam 31 is located at the stepped portion B of the cam groove 23b of the rack 23 as shown in FIG. 6, the magnetic head 1 attached to the tip side of the support arm 10
2 becomes a reproduction position close to the objective lens 7a of the optical pickup 7, and the pin 32 of the cam 31
Is at the position of the step C of the cam groove 23b of the rack 23,
The magnetic head 12 attached to the tip side of the support arm 10 is arranged so as to be in the recording position closest to the objective lens 7a of the optical pickup 7. As shown in FIG. 4, this reproduction position is detected by the operation lever portion 36a of the positioning switch 36 attached to the sub chassis 15 hitting one of the protruding portions 22c of the main slider 20. ,
In the recording position, as shown in FIG. 5, the operation lever portion 37a of the positioning switch 37 attached to the sub chassis 15 is located at the other protruding portion 22d of the main slider 20.
It is detected by hitting.

Both sides 22, 2 of the main slider 20
A cartridge holder 40 in which the disc cartridge 70 is inserted and held is supported between the two so as to be movable in the vertical direction. The cartridge holder 40 has an upper portion 41
And both side parts 42, 42 integrally formed vertically downward from both sides of the upper part 41 are formed in a front inverted upside down shape. The chassis 2 on the upper portion 41 of the cartridge holder 40
A rectangular notch 41c is formed at a position facing the notch 2b. At the positions of the cartridge holder 40 on both sides 22 and 22 of the main slider 20 opposite to the pair of cam groove holes 22a and 22a, the pair of engaging members are loosely fitted in the pair of cam groove holes 22a and 22a. Dowel pins 43, 4
3 are projected respectively. This cartridge holder 4
The engaging pins 43 on the rear sides of the both side portions 42, 42 of 0 are the recesses 2d standing on the rear sides of the both side portions 2a, 2c of the chassis 2.
In addition, each is fitted loosely. Further, a pair of horizontal piece portions 4 for mounting the disk cartridge 70 on the lower edges of the inner sides of the both side portions 42, 42 of the cartridge holder 40 on the front side.
2a and 42a are integrally formed by bending so as to face each other. Further, in the center inside the right side portion 42 of the cartridge holder 40 and in the rear portion inside the left side portion 42, long and short guide grooves 70b and 70c on both sides of the disk cartridge 70 are provided.
The protrusions 42b and 42c that are loosely fitted to the base plate are horizontally bent and formed. Further, a long groove 42d is formed on the upper side of the right side portion 42 of the cartridge holder 40, and a protrusion 42e is vertically bent outward on the front side thereof.

On the upper surface of the upper portion 41 of the cartridge holder 40, the disk cartridge 70 is locked by a pair of guide pins 44, 44 projecting in the front-rear direction of the upper surface and pulled to the optical pickup 7 side. A loading slider 50 that ejects on the front side is attached so as to be reciprocally slidable. The loading slider 50 is made of a metal plate and has a horizontal portion 51 and a right portion 52 that is vertically bent below the right end edge of the horizontal portion 51 and is formed in a substantially inverted L shape on both sides. The horizontal portion 51 of the loading slider 50 is formed with a pair of guide groove holes 51a, 51a loosely fitted in the pair of guide pins 44, 44, and at a position facing the cutout portion 41c of the cartridge holder 40. Has a rectangular cutout 51c. In addition, in the lower part of the right side portion 52 of the loading slider 50,
A substantially triangular claw portion 53 made of a synthetic resin that engages and disengages from the engaging recess 70g of the disk cartridge 70 is attached so as to project inside the right side portion 52 via a rectangular leaf spring 54. Further, a horizontal piece 52a is formed by bending at the center of the right side portion 52 of the loading slider 50. A disc cartridge insertion completion detection switch 55 is attached to the rear side of the horizontal piece 52a, and
An eject completion detection switch 56 is provided on the front side thereof. The oscillating operation lever portion 55a of the disc cartridge insertion completion detection switch 55 projects inward from the slot 42d of the right side portion 42 of the cartridge holder 40, and the right side of the cartridge holder 40 before the loading slider 50 slides. It is located behind the protruding portion 42b of the portion 42. The push-type operation lever portion 56 a of the eject completion detection switch 56 is located at a position facing the protruding portion 42 e of the right side portion 42 of the cartridge holder 40.

A pin 57 is caulked and fixed at the center of the horizontal piece 52a of the loading slider 50 so as to vertically project downward. The pin 57 is loosely fitted in a recess 60a of a first swing plate 60 which is swingably supported by a shaft 59 of a column 58 standing upright on the sub chassis 15. An arcuate cam groove 60b is formed on the drive gear 24 side of the first swing plate 60. A second swing plate 61 is swingably supported by the shaft 59 above the first swing plate 60. On the side of the drive gear 24 of the second swing plate 61, the arcuate cam groove 60b and the cam groove hole 6 are formed.
The arcuate cam surface 61b forming 3 is formed. A drive pin 65 that eccentrically protrudes from the upper surface of the drive gear 24 is loosely fitted in the cam groove hole 63, and the rotation of the drive gear 24 causes the loading slider 50 to move over the cartridge holder 40 for a predetermined distance (for example, one-way 16). 0.5 mm) It is configured to freely slide back and forth. Furthermore, the first swing plate 60
A tension coil spring 66 is formed between the concave portion 60a and the base end portion 61a of the second swing plate 61.

The disk cartridge 70 is formed in a casing from upper and lower halves, and a small (eg, 65 mm diameter) magneto-optical disk 71 capable of recording and reproducing is rotatably housed therein. A chucking hub 72 made of metal is fixed to the center of the magneto-optical disk 71. The chucking hub 72 is exposed to the outside through a circular opening 70a at the center of the lower half of the disk cartridge 70. A long guide groove 70b and a short guide groove 70c are formed on both sides of the disc cartridge 70.
A rectangular opening 70d for recording and reproducing is formed in the upper and lower halves on the long guide groove 70b side. This opening 70d
Is made of metal and can be opened and closed by a U-shaped shutter 73. Further, a pair of positioning round holes 70e and a positioning long hole 70f are formed in the front and rear of the bottom of the disc cartridge 70 on the side of the long guide groove 70b, and the long guide groove 70b has a tip 73a of the shutter 73. Has an engaging recess 70g. The front end portion 73a of the shutter 73 is locked in a closed state by a substantially U-shaped lock lever 74 provided on the long guide groove 70b side in the disc cartridge 70. The shutter 73 is always urged by a spring (not shown) in a direction to close the opening 70d.

According to the disc cartridge loading device 1 of the above embodiment, when the disc cartridge 70 containing the magneto-optical disc 71 is inserted into the cartridge holder 40 as shown in FIG. 1, the right side portion 42 of the cartridge holder 40 is inserted. The long guide groove 70b of the disc cartridge 70 is inserted into the protrusion 42b of the disc cartridge 70, and the shutter 73 of the disc cartridge 70 is unlocked. Disk cartridge 70 for cartridge holder 40
When the disk cartridge 70 is further inserted, the disk cartridge 70 is inserted into the claw portion 53 protruding from the right side portion 52 of the loading slider 50 to the inside of the right side portion 42 of the cartridge holder 40.
Of the disk cartridge insertion completion detection switch 55 attached to the right side portion 52 of the loading slider 50 while the engagement concave portion 70g of FIG.
a is pressed by the disc cartridge 70 to turn on the detection switch 55, and the ejection completion detection switch 56 is turned off to turn on the loading motor 29.
Let N. As shown in FIG. 3, the disc cartridge insertion completion detection switch 55 is provided behind the protrusion 42b of the cartridge holder 40 at the initial position so that it is operated only when the disc cartridge 70 is correctly inserted into the cartridge holder 40. Loading slider 50
Mounted on the right side 52 of the disk cartridge 7
It also serves as a measure for zero insertion error.

When the disc cartridge 70 is completely inserted into the cartridge holder 40, the motor 29 is turned on.
Then, the drive gear 24 rotates clockwise in the drawing via the worm gear 30 and the reduction gears 25 to 28 attached to the motor 29. Due to the rotation of the drive gear 24, the drive pin 65 that is eccentrically provided on the drive gear 24 and protrudes is moved rearward. The drive pin 65 allows the first and second swing plates 6 to
0 and 61 oscillate in the clockwise direction in the figure to slide (load) the loading slider 50 rearward with respect to the cartridge holder 40. By loading the loading slider 50 in the horizontal direction, the loading slider 50 is loaded.
The disc cartridge 70 is pulled onto the turntable 3 by the claw portion 53 of the right side portion 4 of the cartridge holder 40 which is stopped when the disc cartridge 70 is pulled in by the loading slider 50.
The shutter 73 of the disc cartridge 70 is opened by the second protrusion 42b.

After the loading of the disk cartridge 70 by the loading slider 50 is completed, the drive gear 2
4 intermittent gear 24a is the rack 23 of the main slider 20
Mesh with. As a result, the main slider 20 slides (moves forward) rearward with respect to the chassis 2. Due to the forward movement of the main slider 20, the cartridge holder 40 in which the pair of engagement pins 43, 43 are loosely fitted in the pair of cam groove holes 22a, 22a of the both side portions 22, 22 of the main slider 20, respectively. To descend. When reproducing the magneto-optical disk 71 of the disk cartridge 70, the main slider 20 is positioned by contacting one of the protruding portions 22c of the main slider 20 with the operation lever portion 36a of the position detection switch 36, as shown in FIG. When sliding to the position and recording on the magneto-optical disk 71, as shown in FIG. 5, until the other protruding portion 22d of the main slider 20 hits the operation lever portion 37a of the position detection switch 37 and is positioned. The rack 23 slides further rearward. When the cartridge holder 40 is lowered, the loading slider 50 is also lowered together with the cartridge holder 40 (for example, lowered by about 3.2 mm). As a result of these lowering, the positioning round holes 70e and the positioning elongated holes 70f in the front and rear of the disk cartridge 70 that are drawn in by the loading slider 50 and held in the cartridge holder 40 guide the sliding of the main slider 20 on the chassis 2. The pair of front and rear guide pins 18, which also serve as a pair, are fitted and positioned on the chassis 2 of the disk cartridge 70. At this time, the inverted conical head portions 18a of the guide pins 18 reliably guide the holes 70e and 70f of the disc cartridge 70, and the guide pins 18 are securely fitted into the shaft portions 18b of the guide pins 18 for loading operation. Is completed, the disk cartridge 70 does not rattle in the radial direction of the magneto-optical disk 71, and good recording and reproduction can be performed.
The first swing plate 61 is engaged when the rack 23 of the main slider 20 and the intermittent gear portion 24a of the drive gear 24 start to mesh with each other.
The rack 23 is moved a little so that the racks are surely engaged with each other.

In the reproducible state in which the forward movement of the main slider 20 is positioned by the position detection switch 36 and stopped (moved about 5 mm from the initial state and stopped),
The rack 23 has moved to the position shown in FIGS. At this time, the slide plate 35 is moved to the position indicated by the solid line in FIG.
The tip end side of the support arm 10 to which 2 is attached is swung in the direction approaching the optical pickup 7 side. Further, the forward movement of the main slider 20 is positioned and stopped by the position detection switch 37 (stops by moving about 7 mm from the initial state).
In the recordable state, the rack 23 moves further rearward (upper in the figure) than the position shown in FIG. At this time,
The cam 31 under the rack 23 moves the slide plate 35 to the position indicated by the chain double-dashed line in FIG.
The tip end side of the support arm 10 to which 2 is attached is swung in the direction closest to the optical pickup 7 side. In addition, when the support arm 10 is in the standby state, the slide plate 35 moves to the cam 31.
Is located at the position indicated by the chain line in FIG. The reproduction of the magneto-optical disk 71 of the disk cartridge 70 is performed by the optical pickup 7 and the like, and the recording is performed by the optical pickup 7 and the magnetic head 12 and the like.

The ejecting operation of the disc cartridge 70 is performed by rotating the motor 29 in the reverse direction so that the main slider 20 and the loading slider 50 return in the opposite direction. At this time, as shown in FIG. 2, the operation lever portion 56a of the eject completion detecting switch 56 attached to the loading slider 50 hits the projecting portion 42e of the cartridge holder 40 to turn on the eject completion detecting switch 56, thereby performing the eject operation. Is completed.

As described above, the disk cartridge 70 inserted into the cartridge holder 40 and engaged with the claw portion 53 of the loading slider 50 is configured to be retractable and ejectable by the reciprocating sliding movement of the loading slider 50, and at the same time, the main The cartridge holder 40 and the loading slider 50 are configured to be movable up and down with respect to the main slider 20 by the reciprocal sliding of the slider 20 so that the disk cartridge 70 can be loaded / unloaded. Therefore, the disk cartridge has a simple structure. The 70 can be reliably and smoothly loaded or unloaded to eject. Therefore, as in the past,
Since a biasing means such as a tension coil spring for biasing each member and a locking means such as a lock lever for locking each member are not necessary, the number of parts can be significantly reduced and the cost can be reduced. In addition, the structure of the entire device can be simplified, and the size and weight of the device can be further reduced.

The shutter 7 of the disc cartridge 70 is provided inside the right side portion 42 of the cartridge holder 40.
A protruding portion 42b that abuts on the shutter 3 to open and close the shutter 73.
Since the above is provided, the shutter 73 of the disk cartridge 70 can be easily opened and closed by the reciprocal movement of the loading slider 50. This eliminates the need for a conventional shutter opening / closing lever, and from this point as well, the cost and weight of the entire device can be reduced and the disk can be mounted on the right side portion 52 of the loading slider 50 behind the protrusion 42b. Cartridge insertion completion detection switch 55
Since the disc cartridge 70 is provided, the disc cartridge 70 can be pulled in by the loading slider 50 only when the disc cartridge 70 is correctly inserted into the cartridge holder 40, and the erroneous insertion of the disc cartridge 70 can be reliably prevented. Further, the protrusion 42e is provided outside the right side portion 42 of the cartridge holder 40, and the eject completion detection switch 56 is provided outside the right side portion 52 of the loading slider 50 facing the protrusion 42e. Can be ejected reliably and smoothly.

Further, since the main slider 20 and the loading slider 50 are slid by the rack 23 driven by the single motor 29 and the swing plates 60, 61, the number of drive sources can be reduced as much as possible. From this point as well, it is possible to reduce the cost and the weight and thickness of the entire device. Further, the cam 31 is moved by the reciprocating movement of the rack 23.
Since the support arm 10 to which the magnetic head 12 is attached can be freely switched to the standby position, the reproduction position, and the recording position via this, the number of parts can be greatly reduced from this point as well, and the cost can be reduced. In addition, the overall structure of the device can be simplified to make it lightweight and compact,
It can be made even thinner. Furthermore, a pair of positioning switches 36, 37 mounted on the chassis 2
Since the pair of protrusions 22c and 22d are provided on the right side portion 22 of the main slider 20 which faces the main slider 20, the reproducing position and the recording position of the main slider 20 are surely detected and the main slider 20 is accurately positioned at each of these positions. It is possible to position at, and good reproduction and recording are possible.

In addition, according to the above-mentioned embodiment, the loading device of the disk cartridge which accommodates the small recordable and reproducible magneto-optical disk has been described. It goes without saying that the above embodiment can be applied to.

[0029]

As described above, according to the disk cartridge loading apparatus of the present invention, the disk cartridge inserted into the cartridge holder and engaged with the claw portion of the loading slider is slid back and forth with respect to the cartridge holder. Since the cartridge holder and the loading slider can be moved up and down with respect to the main slider by the reciprocating sliding movement of the main slider, the main slider, the cartridge holder and the loading slider can be easily constructed. With such a structure, the disc cartridge can be smoothly and surely loaded and ejected at a predetermined position. Therefore, unlike the prior art, there is no need for a biasing means for biasing each member, a locking means for locking each member, etc., so that it is possible to significantly reduce the number of parts and to reduce the cost, and also the device. The overall structure can be simplified to make it lighter, smaller and thinner.

Further, a protrusion is provided inside at least one side of the cartridge holder to open and close the shutter of the disc cartridge, and the disc cartridge is inserted into the side of the loading slider behind the protrusion. Since the completion detection switch is provided, the loading slider can be pulled in only when the disk cartridge insertion completion detection switch correctly inserts the disk cartridge into the cartridge holder. As a result, it is possible to prevent erroneous insertion of the disc cartridge, and it is possible to easily open and close the shutter of the disc cartridge by the reciprocating movement of the loading slider.

Further, since the protrusion is provided outside at least one side of the cartridge holder, and the eject completion detecting switch is provided outside the side of the loading slider facing the protrusion, the disk cartridge by the loading slider is provided. It is possible to stop the loading slider by detecting the eject completion state of.

[Brief description of drawings]

FIG. 1 is a perspective view of a disc cartridge loading device and a disc cartridge according to an embodiment of the present invention.

FIG. 2 is a right side view of the disc cartridge loading device.

FIG. 3 is a plan view of an essential part of the disc cartridge loading device at the initial stage.

FIG. 4 is a plan view of the disc cartridge loading device during reproduction.

FIG. 5 is a plan view of an essential part of the disc cartridge loading device at the time of recording.

FIG. 6 is an explanatory plan view showing the relationship between the rack, the cam, and the slide plate of the disc cartridge loading device.

FIG. 7 is an exploded perspective view of a conventional disc cartridge loading device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Disc cartridge loading device 2 ... Chassis 20 ... Main sliders 22, 22 ... Both sides 40 ... Cartridge holder 42, 42 ... Both sides 42b ... Projection 42e ... Projection 50 ... Loading slider 53 ... Claw 55 ... Disk cartridge insertion Completion detection switch 56 ... Ejection completion detection switch 70 ... Disk cartridge 70g ... Engagement recess 73 ... Shutter

Claims (3)

[Claims] 1. A main slider slidably supported on a chassis, and a cartridge holder movably supported vertically between both sides of the main slider for inserting and holding a disk cartridge between both sides. And a loading slider that is slidably supported with respect to the cartridge holder, and has a side portion with a claw portion that engages and disengages with an engaging concave portion of the disk cartridge inserted into the cartridge holder. The disk cartridge inserted into the loading slider and engaged with the claw portion of the loading slider is retracted by the reciprocating sliding movement of the loading slider to be ejectable.
A disk cartridge loading device, wherein the cartridge holder and the loading slider are configured to be movable up and down with respect to the main slider by reciprocating sliding of the main slider. 2. A protrusion is provided inside at least one side of the cartridge holder to contact a shutter of the disc cartridge to open and close the shutter, and the disc cartridge is inserted into a side of the loading slider behind the protrusion. The disk cartridge loading device according to claim 1, further comprising a completion detection switch. 3. The cartridge holder is provided with a projecting portion outside at least one side portion thereof, and an eject completion detecting switch is provided outside a side portion of the loading slider facing the projecting portion. 1. The disk cartridge loading device according to 1.