JPH11306632A - Slider driving switching mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the position of a slider disengaged from a gear by keeping a sufficient distance from the gear without using any extra part items. SOLUTION: In this slider driving switching mechanism for selectively engaging two racks 62a and 62b with a gear 66a by opposing the racks 62a and 63a provided respectively in two sliders 62 and 63 to each other so as to hold the gear 66a therebetween, the two shafts 65a and 65b of a driving switching arm 65 held in a manner coaxial to the gear 66a so as to be freely rotated are engaged with L-shaped grooves 62b and 63d having inclined parts provided in the two sliders, one slider is fed to the gear 66a to rotate the driving switching arm 65 by its engagement with the L-shaped groove and, after the other slider is moved to be engaged with the gear 66a, by rotating the driving switching arm 65 by the inclined parts, the other slider is separated from the gear 66a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a slider drive switching mechanism, and more particularly to a slider drive switching mechanism suitable for a loading mechanism of a recording medium reproducing apparatus.

[0002]

2. Description of the Related Art Conventionally, a loading slider for transporting a recording medium in a recording medium reproducing apparatus in a horizontal direction and a clamp slider for clamping the recording medium are switched by one gear and driven. Such a drive switching mechanism will be described with reference to FIG.

A rack provided on each of a loading slider and a clamp slider is opposed to each other so as to sandwich a gear, and a shaft provided on a drive switching arm which is rotatably arranged coaxially with the gear has a loading slider and a clamp slider. Are inserted through the respective L-shaped grooves. One of the sliders is sent to the gear and the drive switching arm is rotated by the engagement of the L-shaped groove and the shaft to move the other slider so as to mesh with the gear. After that, the other slider is fed by a gear, but in this state, the rotation position of the drive switching arm is not stable because the shaft of the drive switching arm is engaged with the horizontal portion of the L-shaped groove. The rack of the slider and the gear are not separated by a sufficient distance.

[0004] In order to stabilize the position of the slider, which is disengaged from the gear, sufficiently away from the gear, for example,
As shown in FIG. 20, the slider was urged by a spring. As described above, in the conventional slider drive switching mechanism, there is a problem that extra parts are necessary, and parts costs and assembly costs are increased. Further, when the loading slider is urged by a spring as shown in FIG. 20, there is a problem that, if the moving stroke of the loading slider is long, the spring exceeds the elastic deformation range or the load on the driving mechanism increases. .

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to reduce the manufacturing cost and to avoid the limitation of the slider movement stroke. Another object of the present invention is to provide a slider drive switching mechanism in which the load on the drive mechanism is not increased by a spring.

[0006]

SUMMARY OF THE INVENTION A slider drive switching mechanism according to the present invention is a slider in which racks provided on two sliders are opposed to each other with a gear therebetween, and the two racks are selectively engaged with the gears. In the drive switching mechanism, two shafts of a drive switching arm rotatably supported coaxially with the gear are respectively engaged with L-shaped grooves having an inclined portion provided on each of the two sliders. Is sent to the gear, and the drive switching arm is rotated by engagement of the L-shaped groove and the shaft to move the other slider so as to mesh with the gear, and then the drive switching arm is rotated by the inclined portion. By moving the slider, the other slider is separated from the gear.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disk recording / reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings. First, an M containing a MD used in the optical disc recording / reproducing apparatus of the embodiment
The D cartridge will be described with reference to FIG. MD shown in the figure
Loading holes 100d and 100c are provided on the left and right ends of the bottom surface of the cartridge 100, and erroneous insertion preventing grooves 100b and 100a are provided on the left and right side surfaces. Further, a reference hole 100g for positioning is provided from the front right side of the bottom surface. Shutter 100 for opening and closing the upper and lower openings of MD cartridge 100
e is slidably mounted on the right side surface of the MD cartridge. The shutter 100e is the cartridge holder 59
The hook that locks the shutter 100e is removed by the tongue piece provided in the opening, and the shutter is opened and closed by a leaf spring (leaf spring 59c shown in FIG. 5) that protrudes into the opening / closing hole 100f.

Next, a schematic configuration of the optical disk recording / reproducing apparatus of the embodiment will be described with reference to FIG. MD cartridge 100
A single insertion slot for inserting and ejecting is provided on the front surface of the apparatus, and a stocker 22 having three-stage storage portions is provided behind the insertion port so as to be able to move up and down. By moving the stocker 22 up and down, the accommodation sections of each stage are adjusted to the front and rear insertion ports and the height position of the cartridge holder 59. The height of the insertion slot and the cartridge holder 59
The height positions of the cartridges at the time of delivery are the same.

When the insertion of the cartridge from the insertion slot is detected by the switch SW1, the feed roller 41 is rotated, and the cartridge is pulled into the stocker until the switch SW5 detects the storage at the fixed position. By moving the stocker up and down, the cartridge can be stored in the storage position of each stage. The feed roller 41 is connected to the window of the stocker (2 shown in FIG. 3).
1d) does not hinder the lifting and lowering of the stocker.

The cartridge of the disk to be recorded / reproduced is adjusted to the height of the cartridge holder 59 and is fed into the cartridge holder 59 by the feed roller 41 (driven by the feed roller drive motor M4 shown in FIG. 4). When the cartridge rotates the loading hook 69, the shaft 69b of the loading hook 69 enters the loading hole 100d of the cartridge, and the loading hook 69 locks the cartridge.
7 (shown in FIG. 2) operates, and the loading motor M5
(Illustrated in FIG. 5) rotates in the loading direction, and the loading hook 69 holds the cartridge in the cartridge holder 5.
Pull into 9. When the loading motor M5 starts rotating, the feed roller 41 stops rotating.

When the loading motor M5 further rotates in the loading direction, the holder elevating arm 55 is rotated, and the cartridge holder 59 is lowered to press the cartridge against the positioning pin of the recording / reproducing unit chassis 80 to position the cartridge at the recording / reproducing position. . Disc playback is performed in this state. The reproduction state is detected by the switch SW8 shown in FIG.

When the loading motor M5 further rotates in the loading direction, the magnetic head 93 is lowered by the magnetic head elevating arm 53 and comes into contact with the disk. In this state, recording on the disc is performed. The recording state is detected by the switch SW9 shown in FIG. When the loading motor M5 and the feed roller drive motor M4 rotate in the reverse direction, the cartridge is returned to the stocker 22 with the reverse process. The cartridge is ejected by the feed roller 41 until the cartridge projects from the insertion slot.

Next, each component will be described in detail with reference to FIGS. Note that the XYZ directions shown in the respective drawings match. Also, the dashed lines denoted by the same reference numerals in each figure are connected. A right side chassis 2 and a left side chassis 3 are fastened to the bottom front and rear chassis 1 shown in FIG. 2 to form a chassis that supports the mechanism of the apparatus. The insertion frame 4 is fastened to the front and rear bottom chassis 1. Rotating member 5 for preventing incorrect insertion
Is rotatably supported by the insertion slot frame 4 and the bottom front and rear surface chassis 1 and is urged to take a fixed posture by a tension coil spring 6 hung between the bottom and front and rear surface chassis 1.

A bracket 7 fastened to the front and rear chassis 1 supports a cartridge detection slider 8 so as to be slidable in the Y direction. The cartridge detection slider 8 is urged in the Y direction by a tension coil spring 9 hung between the cartridge detection slider 8 and the bracket 7. The MD cartridge 100 entering from the insertion slot frame 4 moves the cartridge detection slider 8 to operate the switch SW1 fastened to the front and rear bottom chassis 1 via the substrate. Switches SW6, SW7, S
The printed circuit board 10 to which W8 and SW9 are attached is fastened to the front and rear bottom chassis 1. Dampers 11, 11
Are attached to the chassis 1 via a bracket or directly on the front and rear bottom chassis 1 and are provided with a recording / reproducing unit chassis 8 shown in FIG.
0 is supported in a floating state.

FIG. 11 shows an attached state of the erroneous insertion preventing rotation member 5, and FIG. 12 shows an operation state of the erroneous insertion preventing rotation member 5. Only when the MD cartridge 100 is inserted in the normal posture, as shown in FIGS. 12A to 12D, the protrusion 5a of the erroneous insertion prevention rotating member 5 is pushed by the tip of the MD cartridge 100 to prevent erroneous insertion. The rotating member 5 rotates clockwise to allow the MD cartridge 100 to pass. At this time, the protrusion 5 of the rotation member 5 for preventing erroneous insertion
b is the reference hole 10 of the MD cartridge 100
0 g.

When the MD cartridge 100 is inserted in an incorrect posture, the protrusion 5b is inserted as shown in FIGS.
And the MD cartridge 100 interfere with each other to prevent the erroneous insertion preventing rotation member 5 from rotating, thereby preventing the MD cartridge 100 from being inserted into the apparatus. FIGS. 12H and 12I show the state when the MD cartridge 100 is discharged out of the apparatus. At this time, the erroneous insertion prevention rotating member 5 is rotated counterclockwise by the MD cartridge 100,
It does not hinder the ejection of the MD cartridge 100. After the MD cartridge 100 is inserted and ejected, the tension coil spring 6
The rotation member 5 for preventing incorrect insertion is returned to the original posture by the elasticity of.

The stocker body 21 is fastened to the stocker top plate 20 shown in FIG.
The stocker 22 has three stages of housing sections for housing the MD cartridge 100. The shafts 23c and 23d of the pandagraph mechanism 23 are inserted through the round holes and the long holes 21e of the stocker body 21, and the shafts 23b and 23a are inserted through the round holes and the long holes 1b of the bottom front and rear chassis 1 shown in FIG. . The shafts 24c and 24d of the pandagraph mechanism 24 are inserted through the round holes and the long holes 20b of the stocker top plate 20, and the shafts 24b and 24a are inserted through the round holes and the long holes 3a of the left side chassis 3 shown in FIG. ing. These pandagraph mechanisms 23 and 24 maintain the horizontal posture over the entire vertical stroke of the stocker 22.

The switch operating member 25 is connected to the stocker body 2.
1, a tension coil spring 26 rotatably supported by a shaft 21b erected at 1 and hung between the stocker top plate 20
Is biased clockwise as viewed from above. The three branches of the leaf spring 27 fixed to the stocker body 21 project from the windows 21c of the stocker body 21 into the moving path of the MD cartridge 100, respectively.

When the MD cartridge 100 is in the stocker 22
When drawn in, the corresponding branch of the leaf spring 27 is once pushed outwards and then moved into the loading hole 100.
Enter d and return to the source. During this time, the switch actuating member 25
Is turned by the plate spring 27 in the counterclockwise direction, returns to the original position, turns off the switch SW5 fastened to the stocker top plate 20, and then turns it on. Thus, it is detected that the MD cartridge has entered the fixed position in the stocker 22. The leaf spring 27 is mounted on the MD cartridge 100.
Is held in a fixed position in the stocker 22.

The switch actuating members 28 are rotatably supported by a shaft 21a erected on the stocker main body 21, and the projection 28a protrudes from the window 21f of the stocker main body 21 into the moving path of the MD cartridge 100. When the MD cartridge 100 is stored in the stocker 22, the switch operating members 28, 28,... Rotate counterclockwise to operate the switches SW2, SW3, SW4 attached to the stocker top plate 22 via the bracket. Switch S
From W2, SW3, and SW4, it can be determined in which stage the MD cartridge 100 is stored. The switches SW2, SW3, and SW4 are the MD cartridge 100
Is detected to start the roller drive when re-inserting after the slot-out.

A bracket 30 shown in FIG. 4 is fastened to the right side chassis 2 and holds a stocker elevating motor M3. The bracket 30 is a cartridge holder 5 shown in FIG.
9 is provided with a positioning tongue piece 30a for positioning the ascending position. Bracket 30 and bottom front and rear chassis 1
The gear train supported by the gear train transmits the rotation of the stocker elevating motor M3 to the gear 31.

The shafts 32a, 32a of the slider 32 are engaged with the horizontal guide grooves 2a, 2a of the right side chassis 2,
The slider 32 is slidably supported by the right side chassis 2 in the X direction. The rack 33 fitted to the slider 32 meshes with the gear 31, and the slider 32 is moved in the X direction by the stocker lifting motor M3. The shaft 20a of the stocker top plate 20 shown in FIG. 3 passes through the vertical guide groove 2b of the right side chassis 2 and the stepped guide groove 32b of the slider 32, and the stocker 22 is connected to the stocker lifting motor M
3 to move up and down.

The lowermost position (home position) of the stocker 22 is detected by a switch SW6 shown in FIG.
The photointerrupter PH shown in FIG. 2 is fastened to the front and rear bottom chassis 1 via a substrate, and detects a dent provided in the rack 33. The position of the stocker 22 is recognized based on signals from the switch SW6 and the photointerrupter PH.

The levers 34 and 35 are rotatably supported by the chassis 1 on the bottom front and rear surfaces.
Abuts against the cam 32c of the slider 32, and
Abuts against the contact portion 35b of the lever 35. The lever 35 is rotated via the lever 34 by the movement of the slider 32.

A bracket 36 fastened to the front and rear chassis 1 via a stay 37 is connected to a feed roller drive motor M4.
I support. The reduction mechanism supported by the bracket 38 fastened to the bottom front and rear chassis 1 transmits the rotation of the feed roller drive motor M4 to the gear 40 supported by the shaft 38a.

The feed roller arm 39 is rotatably supported by the shaft 38a of the bracket 38, and is urged in a counterclockwise direction by a tension coil spring 42 hung between the chassis 1 and the front and rear bottom surfaces. The feed roller 41 is rotatably supported on the shaft 39a. A gear 41 a integral with the feed roller 41 meshes with the gear 40.

The shaft 35a provided on the lever 35 is in contact with the feed roller arm 39. When the lever 35 is turned by the cam 32c of the slider 32, the feed roller arm 39 is turned. Then, the feed roller 41 moves in and out of the window 21 d of the stocker 22 as the stocker 22 moves up and down. That is, when the storage section of each stage of the stocker 22 is at the height of the insertion slot, the feed roller 41 is inserted into the stocker 22 and the inserted MD cartridge 100 is inserted.
, But when the stocker 22 moves up and down, -Y
Evacuate in the direction and do not hinder its elevating.

FIGS. 7 and 8 show the front and side surfaces of the stocker 22 and its lifting mechanism. Each of (a) to (c) shows a state in which the uppermost to lowermost storage sections of the stocker are adjusted to the height of the insertion slot.

FIG. 9 (a) is a plan view showing a driving portion of the feed roller arm 39, FIG. 9 (b) is a partial left side view of the portion shown in FIG. 9 (a), and FIG. 9 (c) is FIG. It is a partial right view of the part shown to a). FIG. 10A shows the switches SW1 to S
FIG. 10B is a plan view showing the operation state of W5, and FIG.
FIG. 10C is a partial left side view of the portion shown in FIG.
It is a partial right side view of the part shown to 0 (a). Note that FIG.
10A, the moving range of the member is indicated by a solid line and a two-dot chain line.

The top plate 50 shown in FIG. 5 is fastened to the upper portions of the right side chassis 2 and the left side chassis 3 to cover the mechanism and reinforce the chassis. The top plate 50 is provided with a positioning tongue piece 50 a for positioning the cartridge holder 59 at the raised position. Brackets 51 and 52
Are fastened to a recording / reproducing unit chassis 80 shown in FIG. 6, and a holder elevating arm 55 and a magnetic head elevating arm 53 are connected via a shaft 57 and a connecting member (not shown).
Are rotatably supported.

The magnetic head elevating arm 53 is urged clockwise by a tension coil spring 54 when viewed from the lower right.
The contact portion 53a is pressed against the cam portion 63b of the clamp slider 63. The operating portion 53b of the magnetic head elevating arm 53 is in contact with the lower surface of the magnetic head arm 92a shown in FIG.

The holder raising / lowering arm 55 includes a torsion coil spring 5
6, the contact portion 55a can be contacted with the cam portion 63c of the clamp slider 63 in the counterclockwise direction as viewed from the lower right direction. The shaft 58 is inserted through the elongated hole 59a and round hole 59b of the cartridge holder 59 and the holes 55b and 55c of the holder elevating arm 55, and rotatably connects the cartridge holder 59 to the holder elevating arm 55. The MD cartridge 10 is provided on the right side of the cartridge holder 59.
A leaf spring 59c for opening and closing the zero shutter 100e is attached.

The guide plate 61 is fastened to the bottom front and rear chassis 1, and supports the loading slider 62 and the clamp slider 63 via a horizontal guide groove so as to be slidable in the X direction. The support member 64 is fastened to the guide plate 61, and a shaft 64 a erected thereon rotatably supports the drive switching arm 65 and the gear 66. The shafts 65 a and 65 b erected on the drive switching arm 65 are respectively provided with the deformed L-shaped grooves 6 provided on the loading slider 62.
2b and the modified L-shaped groove 63d provided in the clamp slider 63. Rack 62a of loading slider 62 and rack 63 of clamp slider 63
a can mesh with the small gear 66a of the gear 66. The positional relationship between these members is shown in detail in FIG.

A bracket 60 fastened to the bottom front and rear chassis 1 supports a loading motor M5. The rotation of the loading motor M5 is transmitted to the gear 66 by a gear train. The L-shaped plate 68 is fitted to the hook slider 67 and integrally supported by the cartridge holder 59 so as to be slidable in the X direction. The compression coil spring 71 fitted between the L-shaped plate 68 and the hook slider 67 eliminates play between the L-shaped plate 68 and the hook slider 67. The tongue 68a of the L-shaped plate 68 is engaged with the slit 62c of the loading slider 62, and the hook slider 67 is driven in the X direction by the loading slider 62.

The loading hook 69 is rotatably supported by a shaft 67a of the hook slider 67, and is urged clockwise as viewed from above by a tension coil spring 95 hung between the loading hook 69 and the hook slider 67. The loading start detection arm 70 is a shaft 1 erected on the chassis 1 on the front and rear bottom surfaces.
a (shown in FIG. 2), and is urged clockwise as viewed from above by a tension coil spring 72 hung between the bottom front and rear chassis 1.

The axis 69a of the loading hook 69 is MD
The shaft 69b protrudes into the movement path of the cartridge 100, and is located at a position where the shaft 69b can protrude into the loading hole 100d of the MD cartridge 100. Further, the shaft 69c can be brought into contact with the loading start detection arm 70.
Activate 7

The operation of the loading hook 69 will be described with reference to FIG. When the leading end of the MD cartridge 100 enters the cartridge holder 59 by the rotation of the feed roller 41, the shaft 69a is pushed and the loading hook 69 is pressed.
Rotates counterclockwise. Then, the shaft 69b enters the loading hole 100d of the MD cartridge 100, and the loading hook 69 is
And the shaft 69c moves away from the loading start detection arm 70, and the loading start detection arm 70 rotates clockwise by the elastic force of the tension coil spring 72 to turn off the switch SW7.

When the MD cartridge 100 is ejected, the loading hook 69 is rotating clockwise, and the loading start detecting arm 70 is pushed by the shaft 69c and rotates counterclockwise to turn on the switch SW7. I have. When the switch SW7 is turned off, the loading motor M5 rotates in the loading direction, and the loading hook 69 pulls the MD cartridge 100 into the cartridge holder 59.

The recording / reproducing unit chassis 80 shown in FIG.
Is disposed directly below the cartridge holder 59 described above. The shafts 84 and 85 are Y-shaped by brackets 81 and 82 and the recording / reproducing unit chassis 80, respectively.
It is supported to extend in the direction. These shafts 84 and 85 are connected to a pickup table 9 holding an optical pickup.
1 is slidably supported in the Y direction.

The feed screw 86 is rotatably supported by the bracket 81 and the recording / reproducing unit chassis 80, and the worm 90 is fixed thereto. A leaf spring 94 fastened to the recording / reproducing unit chassis 80 includes a feed screw 86
Is biased in the Y direction to remove play in the Y direction. The screw engaging member 87 fastened to the pickup table 91 is a feed screw 8
6, the pickup table 91 is fed in the Y direction by the rotation of the feed screw 86.

The magnetic head stay 92 fastened to the pickup table 91 bypasses the rear part of the cartridge holder 59 shown in FIG. 5 and extends upward. The magnetic head arm 92a is supported by a magnetic head stay 92 via a leaf spring, and holds a magnetic head 93 at its tip. The magnetic head arm 92a rides on the operating portion 53a of the magnetic head elevating arm 53 shown in FIG. When the magnetic head lifting arm 53 rotates downward, the magnetic head arm 92a rotates downward due to gravity, and the magnetic head 93 is pressed against the upper surface of the loaded magneto-optical disk.

The bracket 83 is fastened to the recording / reproducing unit chassis 80, and holds the pickup feed motor M2. A two-stage gear 89 rotatably supported by a shaft erected on the recording / reproducing unit chassis 80 meshes with a worm 88 fixed to the rotating shaft of the pickup feed motor M2 and a worm 90 fixed to the feed screw 86. Yes,
The rotation of the pickup feed motor M2 is transmitted to the feed screw 86.

The disk motor M1 is fastened to the recording / reproducing unit chassis 80. The turntable fixed to the rotating shaft of the disk motor M1 attracts the loaded magneto-optical disk by magnetic force and transmits the rotation of the disk motor M1. The switch SW10 fastened to the recording / reproducing unit chassis 80 detects the home position of the optical pickup (the innermost position with respect to the magneto-optical disk).
The switches SW11 and SW12 supported on the recording / reproducing unit chassis 80 via the substrate are loaded M
The operation state changes depending on the presence or absence of the hole in the D cartridge, and the type of the magneto-optical disk is identified.

With reference to FIGS. 14 to 17, loading of the MD cartridge 100 and elevating operation of the magnetic head will be described. FIG. 14 shows a reproducing state in which the MD cartridge is loaded, and FIG. 15A shows a state before the loading is started. In the state of FIG. 15A, the small gear 66a is engaged with the rack 62a of the loading slider 62 and is separated from the rack 63a of the clamp slider 63. When the loading motor M5 rotates in the loading direction in this state, the loading slider 62 is moved leftward, and the MD cartridge is pulled into the cartridge holder. Then, at the end of the moving stroke, the right end face of the odd-shaped L-shaped groove 62b of the loading slider 62 pushes the shaft 65a of the drive switching arm 65 to rotate the drive switching arm 65 counterclockwise. Due to the counterclockwise rotation of the drive switching arm 65, the shaft 65b pushes the right end surface of the odd-shaped L-shaped groove 63d of the clamp slider 63 to drive the clamp slider 63 rightward. In addition,
The positional relationship and shape of the modified L-shaped grooves 62b and 63d and the shafts 65a and 65a are shown in detail in FIG.

As shown in FIG. 15 (b), the clamp slider 63 moves rightward and the rack 63a becomes a small gear 66a.
Then, the clamp slider 63 is now fed rightward by the small gear 66a. Then, the inclined portion of the odd-shaped L-shaped groove 63d pushes the shaft 65b to rotate the drive switching arm 65 counterclockwise. At this time, the shaft 65a pushes the inclined portion of the odd-shaped L-shaped groove 62b to move the loading slider 62 to the left, and the rack 62a
From the small gear 66a. Thereafter, the straight portion of the modified L-shaped groove 63d engages with the shaft 65a, and the clamp slider 63 is sent rightward. At this time, the loading slider is moved because the shaft 65a presses the inclined portion of the modified L-shaped groove 62b. 62 is stable at a position away from the small gear 66a.

As shown in FIG. 15C, when the clamp slider 63 presses the switch SW8, a reproduction state is detected. In the case of reproduction, the loading motor M5 is stopped at this position. When performing recording, the loading motor M5 is further rotated in the loading direction. As shown in FIG. 15D, when the clamp slider 63 presses the switch SW9, a recording state (a state in which the magnetic head is in contact with the magneto-optical disk) is detected, and the loading motor M5 is stopped.

When the MD cartridge is ejected from the cartridge holder, the operation reverse to the above is performed by rotating the loading motor M5 in the reverse direction (rotation in the unloading direction). At this time, the drive switching arm 6
5 is pushed by the deformed L-shaped groove 62b, and the drive switching arm 65 disengages the small gear 66a from the clamp slider 6.
The rack 65a is further rotated clockwise from the position where the rack 63a is switched to the rack 62a of the loading slider 62, and the shaft 65a stabilizes the clamp slider 63 at a position away from the small gear 66a. That is, the shaft 65b pushes the vertical portion of the odd-shaped L-shaped groove 63d leftward.

FIG. 16 shows the cartridge holder 59 and the magnetic head arm 9 by the above operation of the clamp slider 63.
2b shows the driven state of 2a. FIG. 16A shows a state in which the cartridge holder 59 has been raised, and FIG. 16B shows a state in which the cartridge holder 59 has been lowered and the magnetic head arm 92a has been lowered.

As shown in FIG. 17A, the elongated hole 59a of the cartridge holder 59 extends in the vertical direction, so that the shaft 58 inserted therethrough has vertical play, and FIG. As shown, the cartridge holder 59 is inclined such that the right side is lowered during the ascent and descent of the cartridge holder 59. In the loading state in which the cartridge holder 59 is lowered, the MD cartridge 100
Is positioned by the positioning member provided on the recording / reproducing unit chassis, and the cartridge holder 59 containing the MD cartridge 100 becomes horizontal.

At the raised position of the cartridge holder 59, the cartridge holder 59 is positioned with the positioning tongue 30a (FIG. 4).
) And the positioning tongue 50a, the cartridge holder 59 becomes horizontal. At this time, the holder elevating arm 55 is slightly bent. As described above, the cartridge holder 59 is accurately positioned at the raised position, so that the MD cartridge 100 can be smoothly transferred to and from the stocker 22.

[0051]

According to the slider drive switching mechanism of the present invention, the position of the slider disengaged from the gear can be stabilized by keeping a sufficient distance from the gear.
Interference with gears due to backlash can be prevented. Further, a separate component for separating the slider from the gear is not required. Further, the movement stroke of the slider is not limited.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a magneto-optical disk recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a part of the magneto-optical disk recording / reproducing apparatus.

FIG. 3 is an exploded perspective view showing another part of the magneto-optical disk recording / reproducing apparatus.

FIG. 4 is an exploded perspective view showing still another part of the magneto-optical disk recording / reproducing apparatus.

FIG. 5 is an exploded perspective view showing still another part of the magneto-optical disk recording / reproducing apparatus.

FIG. 6 is an exploded perspective view showing still another part of the magneto-optical disk recording / reproducing apparatus.

FIG. 7 is a front view showing a part of the magneto-optical disk recording / reproducing apparatus.

FIG. 8 is a right side view showing some members of the magneto-optical disk recording / reproducing apparatus in a see-through manner.

FIG. 9A is a partial plan view showing part of the magneto-optical disk recording / reproducing apparatus in a see-through manner, and FIG. 9B is a plan view of FIG.
FIG. 9C is a left side view of the portion shown in FIG.
FIG. 4 is a right side view of a portion shown in FIG.

10 (a) is a partial plan view of the magneto-optical disk recording / reproducing apparatus, FIG. 10 (b) is a left side view of the portion shown in FIG. 10 (a), and FIG. 10 (c) is FIG. It is a right view of the part shown to a).

FIG. 11 (a) is a partial plan view showing part of the magneto-optical disk recording / reproducing apparatus in a see-through manner, and FIG. 11 (b).
11A is a front view of the portion shown in FIG. 11A, and FIG. 11C is a right side view of the portion shown in FIG.

FIG. 12 is a partial side view for explaining the operation of the magneto-optical disk recording / reproducing apparatus.

FIG. 13 is a plan view showing some members of the magneto-optical disk recording / reproducing apparatus in a see-through manner.

FIG. 14 is a partial side view showing a part of the magneto-optical disk recording / reproducing apparatus in a see-through manner.

FIG. 15 is a partial side view showing in perspective some members for explaining the operation of the magneto-optical disk recording / reproducing apparatus.

FIG. 16 is a partial side view showing in perspective some components for explaining the operation of the magneto-optical disk recording / reproducing apparatus.

FIG. 17A is a perspective view showing a part of the magneto-optical disk recording / reproducing apparatus, and FIGS. 17B and 17C are partial front views for explaining the operation of the magneto-optical disk recording / reproducing apparatus. FIG.

18 (a) is a plan view showing an MD disk cartridge used in the magneto-optical disk recording / reproducing apparatus, FIG. 18 (b) is a bottom view thereof, FIG. 18 (c) is a left side view thereof, and FIG. FIG. 18D is a right side view, and FIG. 18E is a rear view.

FIG. 19 is a configuration diagram for explaining a conventional slider switching mechanism.

FIG. 20 is a schematic side view showing the slider switching mechanism.

[Explanation of symbols]

Reference Signs List 1 bottom front and rear chassis, 1a shaft, 1b long hole 2 right side chassis, 2a horizontal guide groove, 2b vertical guide groove 3 left side chassis, 3a long hole 4 insertion opening frame 5 erroneous insertion prevention rotating member 6 tension coil spring 7 Bracket 8 cartridge detection slider 9 tension coil spring 10 printed circuit board 11 damper 20 stocker top plate, 20a axis, 20b long hole 21 stocker body, 21a, 21b axis, 21c,
21d window, 21e long hole, 21f window 22 stocker 23, 24 pandagraph mechanism, 23a, 23b, 23
c, 23d shaft 24a, 24b, 24c, 24d shaft 25 switch operating member 26 tension coil spring 27 leaf spring 28 switch operating member, 28a protrusion 30 bracket, 30a positioning tongue 31 gear 32 slider, 32a shaft, 32b step guide groove , 32c cam 33 rack 34 lever, 34a, 34b shaft 35 lever, 35a shaft, 35b contact part 36 bracket 37 stay 38 bracket, 38a shaft 39 feed roller arm, 39a shaft 40 gear 41 feed roller, 41a gear 42 tension coil spring 50 Top plate, 50a Positioning tongue 51, 52 Bracket 53 Magnetic head elevating arm, 53a Contact part, 53b
Actuator 54 Tension coil spring 55 Holder elevating arm, 55a Contact part, 55b, 5
5c hole 56 torsion coil spring 57, 58 axis 59 cartridge holder, 59a long hole, 59b round hole, 59c leaf spring 60 bracket 61 guide plate 62 loading slider, 62a rack, 62b
Deformed L-shaped groove 62c Slit 63 Clamp slider, 63a Rack, 63b, 6
3c Cam portion 63d Deformed L-shaped groove 64 Support member, 64a shaft 65 Drive switching arm, 65a, 65b shaft 66 gear, 66a Small gear 67 Hook slider, 67a shaft 68 L-shaped plate, 68a Tongue piece 69 Loading hook, 69a, 69b , 69c
Axis 70 Loading start detection arm 71 Compression coil spring 72 Tension coil spring 80 Recording / reproducing unit chassis 81, 82, 83 Bracket 84, 85 Axis 86 Feed screw 87 Screw engaging member 88 Worm 89 Two-stage gear 90 Worm 91 Pickup table 92 Magnetic Head stay, 92a magnetic head arm 93 magnetic head 94 leaf spring 95 tension coil spring 100 MD cartridge, 100a, 100b erroneous insertion prevention groove, 100c, 100d loading hole,
100e Shutter, 100f Opening / closing hole 100g Reference hole M1 Disk motor M2 Pick-up feed motor M3 Stocker elevating motor M4 Feed roller drive motor M5 Loading motor SW1, SW2, SW3, SW4, SW5, SW6, S
W7, SW8, SW9 SW10, SW11, SW12
Switch PH Photointerrupter

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuichi Asano 1-21-5 Ogawahigashi, Akiruno-shi, Tokyo 5 shares Inside Kenwood Precision Co., Ltd.

Claims (1)

[Claims] 1. A slider drive switching mechanism in which racks provided on two sliders are opposed to each other so as to sandwich a gear, and the two racks are selectively engaged with the gears, and provided on each of the two sliders. The two axes of the drive switching arm rotatably supported coaxially with the gear are respectively engaged with the L-shaped groove having the inclined portion, and one of the sliders is sent to the gear to engage the L-shaped groove with the shaft. In some cases, the drive switching arm is rotated to move the other slider into engagement with the gear, and then the other slider is separated from the gear by rotating the drive switching arm by the inclined portion. A slider drive switching mechanism configured as described above.