JP2000156009A - Recording medium driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a disk recording medium being carried from colliding with the mechanism component of a turntable or the like. SOLUTION: A pair of CD detecting levers 29 and 30 are supported by a holder 27 movable back and forth, and positioning pins 39 and 40 are vertically provided in the CD detecting levers 29 and 30. By abutting the peripheral edge of the inserting direction tip side of a CD inserted from an insertion port 6 on the positioning pins 39 and 40, the CD detecting levers 29 and 30 are rotated to turn ON a detecting switch 31, and based on this ON signal, the holder 27 is retreated. Thus, in a state where the peripheral edge of the inserting direction tip side of the CD is positioned/held by the positioning pins 39 and 40, the CD is carried to a playing position by the rotary-driving force of a carrier roller 44, and the holder 27 is stopped when the center hole of the CD is carried to a portion directly above a CD turntable 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium drive for recording and / or reproducing a disk-shaped recording medium represented by a CD (compact disk) by an optical pickup, and more particularly, to a recording medium driving device for inserting a recording medium into an insertion slot. The present invention relates to a transport mechanism for transporting a sheet to and from a turntable.

[0002]

2. Description of the Related Art In general, in a compact disc player for a vehicle, a CD (compact disc) is inserted from an insertion opening formed in the front of the main body of the apparatus and automatically transported to a play position. A slot-in system has been adopted in which the paper is automatically conveyed from the play position to the insertion port and taken out from the insertion port.

Conventionally, as such a slot-in type CD transport mechanism, a roller rotating by a motor as a driving source is disposed at the back side of an insertion slot, and a driven roller or a highly lubricated resin is provided opposite to the roller. Is arranged so that the CD is transported between the play position and the eject position by rotating the roller while holding the CD between these rollers and the driven roller (or guide plate). I have.

[0004]

However, in the above-mentioned prior art, since the CD is transported while being sandwiched between a roller disposed near the insertion slot and a driven roller (or guide plate), the CD is transported near the play position. The CD is in a cantilever state in which only the rear end side in the insertion direction is sandwiched. If vibration is applied from the outside in this cantilever state, the CD may collide with the turntable or other mechanism parts and be damaged.

[0005]

According to the present invention, there is provided a moving bracket capable of positioning a front end side of a disk-shaped recording medium conveyed by a rotating force of a roller in an inserting direction, and the moving bracket is used when the recording medium is conveyed. The recording medium is moved in the transport direction. When such a moving bracket is provided, the recording medium is conveyed in a state where the front end side in the insertion direction is positioned, so that the recording medium can be prevented from being damaged due to external vibration.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a recording medium driving device according to the present invention,
A roller for transporting a disk-shaped recording medium, a movable bracket disposed in the back of the roller and capable of moving forward and backward, and a positioning member provided on the movable bracket,
With the peripheral edge of the recording medium in contact with the positioning member, the moving bracket is moved forward and backward, and the rollers are rotated to convey the recording medium.

[0007] With this configuration, the recording medium is conveyed with the front end side in the insertion direction positioned, so that the recording medium can be prevented from being damaged due to external vibration.

Further, when the positioning member has a groove for positioning the recording medium in the thickness direction, the positioning accuracy of the recording medium by the positioning member can be improved.

When the moving speed of the moving bracket and the rotation speed of the roller are set so that the recording medium is pressed against the positioning member, specifically, the recording medium is transported from the insertion port to the play position. In this case, the moving speed of the moving bracket is set to be slower than the conveying speed of the recording medium due to the rotation of the rollers. If the moving speed of the moving bracket is set to be higher than the speed, the recording medium does not separate from the positioning member during conveyance, so that vibration of the recording medium can be reliably prevented.

The positioning member may be fixedly provided on the moving bracket, but it is preferable that the positioning member is provided on each of a pair of levers rotatably supported by the moving bracket.

[0011] In addition to the two levers, a positioning member is provided on each of a pair of rotating levers biased in a direction approaching each other, and a peripheral edge of the recording medium is moved along each of the two levers and the two rotating levers. When the recording medium is configured to be brought into contact with the positioning member, even when a CD (compact disk) is used as the recording medium, both a large-diameter disk having a diameter of 12 cm and a small-diameter disk having a diameter of 8 cm can be reliably transported. That is, as is well known, a CD has a diameter of 1 mm.
2cm large disc and 8cm small disc
Although there are various types, by adopting the above configuration, the CD is positioned at two positions on the front end side and two positions on the rear end side in the insertion direction, that is, a total of four positions by the positioning members of the two levers and the two rotation levers. Even if the rear end side of the small-diameter disk in the direction of insertion of the small-diameter disk being transported comes off the roller, the vibration of the small-diameter disk can be prevented by the two levers and the two rotating levers. In addition, since there is no problem even if the rollers come off from the rear end of the small-diameter disk in the middle of conveyance, the roller can be installed closer to the insertion slot, and a space is provided in the depth direction of the apparatus. This is effective for downsizing the device.

The moving amount of the moving bracket may be varied according to the difference in the diameter of the recording medium. However, a stopper member capable of regulating the opening angle of both levers is provided, and the recording medium has a large diameter. When the disc is a disc, the stopper member is operated during the movement of the moving bracket to make both the levers rotatable. When the recording medium is a small-diameter disc, the two levers are moved during the movement of the moving bracket. When the rotation is locked by the stopper member, both levers selectively rotate according to the difference in the diameter of the recording medium, so that the control system for moving the moving bracket can be simplified. In this case, if the lock release mechanism for operating the stopper member is interlocked with the rotation of the two rotation levers, the mechanism for operating the stopper member can be simplified.

The moving bracket may be a dedicated member for positioning the recording medium, but a recording medium for recording / reproducing both the recording medium and a second recording medium other than the recording medium. In the case of a drive device, for example, a CD as the recording medium and an M as the second recording medium
In the case of a recording medium drive for recording / reproducing D (mini-disc) with a common optical pickup, the moving bracket can also be used as a holder for positioning and holding the MD cartridge case.

With this configuration, when the MD is inserted, the moving bracket (holder) is retracted as in the case of the CD, and the shutter is opened during the movement to transport the MD to a predetermined position. . In this case,
Preferably, the length of the holder in the front-rear direction is set smaller than the diameter of the recording medium (small diameter disc),
This is effective in reducing the depth dimension of the device.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a recording medium drive, FIG. 2 is a plan view of a table switching mechanism mounted on a main chassis,
3 is a side view of the table switching mechanism, FIG. 4 is a plan view of the shutter opening / closing mechanism, FIG. 5 is a side view of the shutter opening / closing mechanism,
6 is a plan view showing an 8 cm CD loading state, FIG. 7 is a front view showing an 8 cm CD loading state, and FIG.
Is a plan view showing a playing state of an 8 cm CD, and FIG.
Front view showing the playing state of a CD, FIG. 10 shows a 12 cm CD
FIG. 11 is a plan view showing the loading state of FIG.
FIG. 12 is a plan view showing the loading state of the MD, FIG. 13 is a front view showing the loading state of the MD, FIG. 14 is a plan view showing the playing state of the MD, and FIG. FIG. 16 is a front view showing a play state, and FIG. 16 is a flowchart for explaining a play operation of a CD and an MD.

The recording medium driving apparatus according to the present embodiment includes a frame 1 installed at a predetermined position in a vehicle (for example, in a console).
And a main chassis 2 disposed inside the frame 1
And a sub-chassis 3 disposed above the main chassis 2 and an arm clamp 4 disposed above the sub-chassis 3, and cover the front surface of the frame 1 as shown in FIG. An insertion port 6 is formed in the front plate 5. The insertion slot 6 includes a horizontally long CD insertion portion 6a and an MD insertion portion 6b partially protruding from the upper side thereof.
The lower region of the insertion portion 6b overlaps with the region at the center of the CD insertion portion 6a, and the insertion opening 6 is entirely convex. The back side of the insertion slot 6 is closed by a dustproof member 7 made of a felt material. The dustproof member 7 includes a first slit 7a extending horizontally along the CD insertion portion 6a and both ends of the MD insertion portion 6b. A second slit 7b extending in the vertical direction is formed, and the first slit 7a and the second slit 7b intersect.

The first medium used in this embodiment is a CD (compact disc) having a diameter of 8 cm and a diameter of 12 cm.
Hereinafter, a CD having a diameter of 8 cm will be referred to as a small-diameter disc SD and a CD having a diameter of 12 cm will be referred to as a large-diameter disc LD as required. These small-diameter disk SD and large-diameter disk L
D is inserted and ejected from the CD insertion portion 6a,
Slit 7a functions as a doorway for a CD. Also,
The second medium used in the present embodiment is an MD (mini disk). As shown in FIG. 12, the MD is a magneto-optical disk Mb in a cartridge case Ma made of synthetic resin.
The cartridge case Ma is provided with a shutter Mc for opening and closing the magneto-optical disk Mb. This MD is inserted and ejected from the MD insertion portion 6b, and at this time, the central portion of the first slit 7a and the second slit 7
The dustproof member 7 partitioned into an H shape by b secures the entrance and exit of the MD. Note that the center position C2 of the MD insertion portion 6b is offset to the right side in the figure with respect to the center position C1 of the CD insertion portion 6a, so that the recording / reproducing of the small-diameter disk SD and the large-diameter disks LD and MD magneto-optical disks Mb.
Each rotation center at the time of reproduction is set to coincide with the center position C1.

As shown in FIG. 2, the four corners of the main chassis 2 are elastically supported by the frame 1 via damper members 8, and the vibration from the frame 1 is directly transmitted to the main chassis 2. There is no such thing. The main chassis 2 is selectively locked by a lock mechanism (not shown),
In this locked state, the main chassis 2 is fixedly supported on the frame 1. A thread motor 9 is mounted on the main chassis 2, and the thread shaft 9 is
Is rotated, and the rotation of the screw shaft 10 causes the optical pickup 11 to reciprocate along the main shaft 12 and the sub shaft 13 which are parallel to each other. The spindle motor 14 is mounted on the main chassis 2.
As shown in FIG. 3, the rotation shaft of the spindle motor 14 and the lower end of the drive shaft 15 are connected by a belt 16 on the lower surface of the main chassis 2, and the drive shaft 15 drives the spindle motor 14 Rotate as The drive shaft 15 has a coupling portion 17 made of magnet at its upper end.
The drive shaft 15 is selectively connected to the CD turntable 18 and the MD turntable 19 by a table switching mechanism, as described later.

That is, the CD turntable 18 is C
It is rotatably supported at the tip of the D switching arm 20,
The CD switching arm 20 is connected to a CD switching lever 21 which is driven in a vertical direction and a front-rear direction by a cam mechanism (not shown). Similarly, the MD turntable 19 is rotatably supported at the tip of an MD switching arm 22. The MD switching arm 22 has an MD switching lever 2 which is driven in the vertical and longitudinal directions by a cam mechanism (not shown).
3 are connected. Now, when the CD switching lever 21 is raised from the state shown in FIG. 2, the CD switching arm 20 and the CD turntable 18 are also raised integrally.
When the switching lever 21 moves in the direction of arrow a, the CD switching arm 20 rotates counterclockwise, and the CD turntable 18 stops right above the drive shaft 15. The turntable 18 for CD is attracted to the connecting portion 17a, and the turntable 18 for CD is connected to the drive shaft 15 (see FIG. 3). When the MD switching lever 23 is raised, the MD switching arm 22 and the MD turntable 19 are also raised integrally. In this state, when the MD switching lever 23 moves in the direction of arrow b, the MD switching arm 22 rotates clockwise. Then, the MD turntable 19 stops immediately above the drive shaft 15, and then the MD turntable 19 is lowered by the lowering of the MD switching lever 23, whereby the connecting portion 1 is moved.
7a, and the MD turntable 1 is attached to the drive shaft 15
9 are combined.

As shown in FIGS. 6 to 15, the sub-chassis 3 disposed above the main chassis 2 is made of a metal plate that is bent in a convex shape, and this sub-chassis 3 drives a cam plate (not shown). Thereby, it can be moved up and down with respect to the main chassis 2. The arm clamp 4 is attached to the sub-chassis 3 so as to be rotatable in the vertical direction with the left side in the figure as a fulcrum, and a clamper 24 is rotatably supported at its tip. The center of rotation of the clamper 24 is located directly above the drive shaft 15 and a CD (small diameter disc SD)
Alternatively, when playing a large-diameter disc LD), the arm clamp 4 rotates downward, and the clamper 24 and the CD turntable 18 chuck the CD. A drive lever 25 is attached to the sub-chassis 3, and the drive lever 25 is rotatable around a support shaft 26 using a motor (not shown) as a drive source. The holder 27 is connected to the tip of the drive lever 25, and this holder 27
The rotation of 5 causes the sub-chassis 3 to move forward and backward in the convex portion. The depth dimension of the holder 27 is set to be less than half the length of the MD cartridge case Ma in the front-rear direction, and the MD is held by the holder 27 in the holder 27.
And move to the play position. The holder 27 is provided with a pair of stoppers 27a abutting on the distal end surface of the MD in the insertion direction, and claw portions 27b are provided on both left and right sides of the holder 27 to be engaged with the cartridge case Ma of the MD (FIG. 12). reference).

An MD detection lever 28 and a pair of CD detection levers 29 and 30 are rotatably supported by the holder 27, and the two CD detection levers 29 and 30 mesh with gears 29b and 30b near the center of the shaft. And the spring 3
Oc urges the free ends in directions approaching each other. MD detection lever 28 and one CD detection lever 2
9, a detection switch 31 is provided near the other CD detection lever. A lock pin 30a is implanted in the -30. The lock pin 30a faces a contact portion 32b formed by bending a part of the lock slider 32,
The detection lever 30 includes a lock pin 30a and a lock slider 3.
When the second contact portion 32b contacts the second contact portion 32b, it cannot be rotated any more. The lock slider 32 is urged rightward in FIG. 6 by a spring 33, and a tapered portion 32 a formed at the tip protrudes rightward from the holder 27. The lock slider 32 is operated by a release lever 34 pivotally supported at the rear of the sub-chassis 3, and the release lever 34 and a rotation lever 35 pivotally supported at the front of the sub-chassis 3 are connected by a link lever 36. I have. The link lever 36 is a spring 37
The boss 35a of the rotating lever 35 is engaged with the long hole 36a of the link lever 36. Another rotating lever 38 is pivotally supported on the front left side of the sub-chassis 3, and the two rotating levers 35, 38 are urged in directions approaching each other by springs 35 c, 38 c, and are connected to the front side of the holder 27. Abut.

Positioning pins 39, 40 are respectively suspended from the tips of both CD detection levers 29, 30. A grooved flange 39 is provided below the positioning pins 39, 40.
a, 40a are provided. Although not shown, positioning pins 35b, 38a having similar grooved flanges are also provided at the tips of both rotating levers 35, 38.
As shown in FIGS. 8 and 11, the peripheral edge on the leading end side of the CD in the insertion direction is a grooved flange portion 39 of both positioning pins 39 and 40.
a, 40a, is positioned by contacting the
The peripheral edge on the rear end side in the insertion direction is positioned by contacting the positioning pins 35b, 38a of the two rotating levers 35, 38.

At the front of the sub-chassis 3 are mounted three light receiving / emitting elements 41 composed of optical sensors such as photocouplers. Each of the light receiving / emitting elements 41 is arranged at a predetermined interval on the same line parallel to the front plate 5. And are arranged. These light receiving and emitting elements 41 are used as determination means, and the types of CD and MD are determined based on signals output from each light receiving and emitting element 41, and the sub chassis 3 is determined based on the determination result.
Is performed. That is, when a CD is inserted, the sub-chassis 3 moves to the upper CD position and retreats from the CD transport path, and when an MD is inserted, the sub-chassis 3 moves to the lower MD position and moves to the holder 27. Are located on the transport path of the MD. A shutter member 42 is disposed behind each light receiving / emitting element 41. As shown in FIGS. 4 and 5, the shutter member 42 has a gear 43 that meshes with a rack (not shown). It can rotate between a state and a horizontal state. 4 shows the opened state of the shutter member 42. In this case, the shutter member 42 is in the horizontal state shown by the solid line in FIG. Can be inserted into On the other hand, the shutter member 42
Is in the vertical state (closed state) indicated by the broken line in FIG.

A transport roller 44 made of a rubber material is disposed behind the front plate 5, and the roller 44 is rotated by a motor (not shown) as a drive source. A driven roller (or a guide plate), not shown, is disposed above the roller 44 so that the CD is conveyed to the play position by the rotating roller 44 while being held between the roller 44 and the driven roller. However, as shown in FIG. 8, in the case of the small-diameter disk SD, the small-diameter disk SD separates from the roller 44 at the play position, and the small-diameter disk SD
9 and 30 positioning pins 39 and 40 and both rotating levers 3
5 and 38 are held by the positioning pins 35b and 38a.

The operation of the recording medium driving device having the above configuration will be described with reference to the flowchart shown in FIG.

In a standby state where neither a CD nor an MD is inserted, the shutter member 42 is in a closed state shown by a broken line in FIG. 5, and the entire mechanism including the main chassis 2 and the sub-chassis 3 is a frame. It is in a locked state fixedly supported by the body 1. When a CD or MD is inserted from the insertion slot 6 into the interior from the standby state, the CD and MD are closed and the shutter member 42 is closed.
And the medium inserted by each light emitting / receiving element 41 in this suspended state is a CD and M
D is determined. That is, since the three light emitting / receiving elements 41 are arranged in a line in the horizontal direction in front of the shutter member 42, when a CD is inserted, one or two of the three light emitting / receiving elements 41 are turned on (or off). ), When the MD is inserted, all three light emitting / receiving elements 41 are turned on (or off), and the type of the CD or MD is determined based on the difference in the number of the on or off signals. This determination is made for at least one light receiving / emitting element 41.
Whether the inserted medium is a CD or an MD is determined by whether or not the detection signals of all of the light emitting / receiving elements 41 have been switched within a predetermined time after turning on (or off).

Here, when it is determined that the inserted medium is a CD (small diameter disk SD or large diameter disk LD), the CD switching arm 20 is determined based on the determination result.
Rotates, the CD turntable 18 is coupled to the drive shaft 15, the sub-chassis 3 moves up to the CD position shown in FIG. 7, and the holder 27 moves up to the CD position together with the sub-chassis 3. Thereby, the sub-chassis 3 and the holder 27
A transfer path for the CD opposing the CD insertion portion 6a of the insertion slot 6 is secured below, and the positioning pins 39, 40 of the both CD detection levers 29, 30 and the positioning pins 35b, 38a of the both rotation levers 35, 38 are connected. It will be located in the CD transport path. When the completion of the raising operation of the sub-chassis is detected by detecting means (not shown), the shutter member 42 is opened as shown by the solid line in FIG. 5, and the roller 44 rises to move the CD with the driven roller (not shown). Sandwiched between
The CD is started to be conveyed inside by the rotational driving force of the roller 44.

When the CD is conveyed by a predetermined amount in this manner, the peripheral edge on the leading end side in the insertion direction of the CD is
When the two CD detection levers 29 and 30 rotate in contact with the grooved flange portions 39a and 40a of the first and second CD detection levers 29 and 40, the contact portion 29c provided on one CD detection lever 29 separates from the detection switch 31. The detection switch 31 is turned on. The motor (not shown) is rotated based on the ON signal, and the drive lever 25 is rotated by using the motor as a drive source. Therefore, the holder 27 retreats in the convex portion of the sub-chassis 3, and both the positioning pins 39 and 40 are moved together with the holder 27. Moving. Therefore, the CD is transported by the rotational driving force of the roller 44 with the peripheral edge on the leading end side in the insertion direction positioned and held by the positioning pins 39 and 40, and the center hole of the CD is transported right above the CD turntable 18. At this point, the holder 27 stops. At that time, the roller 44
When the moving speed of the holder 27 is set to be slightly lower than the conveying speed of the CD due to the rotation of the CD, the peripheral edge of the CD is formed by the grooved flange portions 39a, 4 of the positioning pins 39, 40.
Since the CD is securely pressed against Oa, the CD does not collide with the mechanical components such as the sub-chassis 3 and the holder 27 and is not damaged due to external vibration during the transport of the CD.

When the holder 27 is stopped at the retracted position, FIG.
, The sub-chassis 3 descends from the CD position,
Accordingly, the arm clamp 4 rotates downward to chuck the CD with the clamper 24 and the CD turntable 18, and the entire mechanism including the main chassis 2 and the sub-chassis 3 is elastically supported by the frame 1. The lock is released. Then, C is controlled by the spindle motor 14.
By rotating the D turntable 18 and transferring the optical pickup 11 on the main chassis 2 in the radial direction of the CD, the playing operation of the CD is started. In this play state, the small-diameter disc SD and the large-diameter disc LD of the CD have different distances from the center of rotation to the peripheral edge. Therefore, the positions of the positioning pins 39 and 40 are determined according to the diameter difference between these two types of discs. Needs to be changed. Hereinafter, this point will be described in detail.

As shown in FIG. 6, when the small-diameter disc SD is inserted, the peripheral edge on the tip side in the insertion direction comes into contact with the grooved flange portions 39a, 40a of the positioning pins 39, 40. , 30 are pushed out and rotated, and when the lock pin 30a contacts the contact portion 32b of the lock slider 32, both CD detection levers 29,
30 is in a locked state where it cannot rotate any more. Both CDs
The detection levers 29 and 30 are retracted together with the holder 27 while maintaining this opening angle, and together with the positioning pins 35.
When the b and 38a come into contact with the peripheral edge of the small-diameter disk SD, the two rotating levers 35 and 38 start rotating. In the case of the small-diameter disk SD, since its diameter is as small as 8 cm, as the small-diameter disk SD approaches the play position, the two rotating levers 35, 38 are moved toward the rear end side in the insertion direction of the small-diameter disk SD by the urging forces of the springs 35c, 38c. The link lever 3 rotates by a large amount toward the link lever 3.
6 moves forward against the spring force of the spring 37, and rotates the release lever 34 so as to be inclined. For this reason, the tapered portion 3 formed at the tip of the lock slider 32
2a retracts without contacting the release lever 34,
Both CD detection levers 29 and 30 by lock slider 32
While the locked state is maintained, the small-diameter disk SD is transported to the play position as shown in FIG. During the transportation, the rear end side of the small-diameter disk SD in the insertion direction separates from the roller 44. At this point, four peripheral edges of the small-diameter disk SD are positioned by the positioning pins 35b, 38a, 39, and 40.
After that, it is transported to the play position as the holder 27 retreats.

On the other hand, as shown in FIG.
When D is inserted, the two rotating levers 35 and 38 abut on the periphery of the large-diameter disc LD and start to rotate as in the case of the small-diameter disc SD. The link lever 36 and the release lever 34 operate in conjunction with the rotation of the rotation lever 35. However, in the case of a large-diameter disc LD, since the diameter thereof is as large as 12 cm, the link lever 36 does not move forward. Then, as the large-diameter disc LD approaches the play position, the two rotating levers 35 and 38 have an angle close to the initial state, the link lever 36 is held at the initial position while being urged by the spring 37, and the release lever 34 is also horizontal. Maintain state. As a result, the tapered portion 32a of the lock slider 32 abuts the left end of the release lever 34 in the drawing just before the play position, and the lock slider 32 is
And the contact portion 32b is disengaged from the lock pin 30a, so that the lock state of the CD detection levers 29 and 30 by the lock slider 32 is released. Therefore, both CD detection levers 29 and 30 are pushed and expanded as the large-diameter disc LD approaches the play position, and as shown in FIG. 11, at the play position, rotate to a maximum open angle close to a horizontal state and stop.

Next, a case where an MD is inserted will be described. In this case, as described above, all the light receiving / emitting elements 41 are inserted.
Is switched and the MD output lever is driven, the MD switching lever 23 is driven based on the determination result, the MD switching arm 22 is rotated, and the MD turntable 19 is coupled to the drive shaft 15. At the same time, the sub-chassis 3 moves to the MD position shown in FIG. 13, and the holder 27 moves to the MD position together with the sub-chassis 3. When the sub-chassis 3 is at the MD position in advance, the sub-chassis 3
And the holder 27 are both maintained at the MD position. As a result, a part of the sub-chassis 3 and the holder 27 enters the CD transport path, and the front open end of the holder 27 faces the MD insertion portion 6b of the insertion slot 6. When detecting that the sub-chassis 3 and the holder 27 are at the MD position is detected by a detection unit (not shown), the shutter member 42 is opened, and when the user pushes the MD inward, as shown in FIG. The leading end surface in the direction contacts the stopper 27a in the holder 27 and stops, and the claw portion 27b is hooked on the MD cartridge case Ma. At the same time, one end of the MD detection lever 28 is pressed by the MD insertion direction end surface and rotated, and the rotation of the MD detection lever 28 turns on the detection switch 31. Hereinafter, similarly to the case of the CD, the rotation of the drive lever 25 causes the holder 27 to retreat within the convex portion of the sub-chassis 3, and the MD is transported while being hung on the holder 27. Then, during the transport of the MD, the shutter Mc
Is released and the magneto-optical disk Mb is exposed from the window hole of the cartridge case Ma, and the holder 27 stops when the centering hub of the magneto-optical disk Mb is transported right above the MD turntable 19. After the holder 27 stops at the retreat position in this way, as shown in FIG. 15, the sub-chassis 3 is lowered from the MD position, and the centering hub of the magneto-optical disk Mb of the MD is accordingly moved to the MD.
The chucking is completed by the magnet being attracted to the turntable 19, and the entire mechanism is in the unlocked state elastically supported by the frame 1. Then, the MD turntable 19 is driven by the spindle motor 14.
Is rotated to move the optical pickup 11 in the radial direction of the magneto-optical disk Mb, thereby starting the MD playing operation.

In the above embodiment, a pair of positioning pins 39 and 40 for positioning the front end side of the CD in the insertion direction are provided on the holder 27, and the holder 27 is retracted while the CD is being retracted.
Is transported by the rotational force of the roller 44, so that even if vibration is applied from the outside during the transport of the CD, it is possible to prevent the CD from colliding with the turntable or other mechanism parts and being damaged. Also, both positioning pins 39, 40
, Grooved flange portions 39a, 40 that abut against the periphery of the CD
a is formed, the CD is also positioned in the thickness direction, and C is determined by both positioning pins 39 and 40.
The positioning accuracy of D can be improved.

When the CD is transported from the insertion slot 6 to the play position, the moving speed of the holder 27 is set to be slower than the transport speed of the CD due to the rotation of the roller 44, and conversely, the CD is played. When the CD is transported from the position to the insertion slot 6, the moving speed of the holder 27 is set to be higher than the transport speed of the CD due to the rotation of the roller 44, so that the CD being transported is separated from the positioning pins 39 and 40. Therefore, the vibration of the CD can be reliably prevented. In addition, since the moving force of the holder 27 is applied to the CD in addition to the rotational force of the roller 44 when the CD is ejected, the driving force for ejecting the CD increases, for example, so that the insertion port 6 side is higher than the back side. Even if the frame 1 is installed at an angle,
The CD can be reliably transferred from the play position to the insertion slot 6.

Further, a pair of CD detection levers 29, which rotatably support both positioning pins 39, 40 on the holder 27,
30 and a pair of pivoting levers 35, 38 rotatably supported by the sub-chassis 3.
5b and 38a are provided so that the periphery of the CD is resiliently contacted with the four positioning pins 39, 40, 35b and 38a, so that the small-diameter disc 8 cm in diameter comes off the roller 44 as it approaches the play position. But
The positioning pins 39, 40, 35b, 38a can prevent the small-diameter disk SD from vibrating. Also,
Since there is no problem even if the roller 44 comes off from the rear end side of the small-diameter disk SD in the middle of conveyance, the installation position of the roller 44 can be made closer to the insertion slot 6, and accordingly, there is a margin in the depth direction of the apparatus. This is effective for downsizing the device.

When the CD moves to the play position together with the holder 27, the rotation of both CD detection levers 29 and 30 is prevented by the lock slider 32 in the case of the small-diameter disk SD, and the lock slider 32 in the case of the large-diameter disk LD. , And the two CD detection levers 29 and 30 are rotated, so that the amount of movement of the holder 27 can be kept constant irrespective of the difference in the diameter of the CD. Can be simplified. In addition, as the lock release mechanism for operating the lock slider 32, the link lever 36 connected to the release lever 34 is linked to the rotation of the rotation lever 35, so that the lock release mechanism for operating the lock slider 32 is simplified. be able to.

In the above embodiment, the output signal of each light emitting / receiving element 41 is used as the judging means for judging the type of CD and MD. However, other configurations can be adopted. Hereinafter, modified examples of the determination unit will be described.

In the modified examples shown in FIGS. 17 to 24, a pair of first arms 46, 47 are supported by the sub-chassis 45, and the first arms 46, 47 are rotatable about shafts 46a, 47a. . Slider 4 on first arms 46 and 47
8 and 49 are connected, and these sliders 48 and 49 are connected.
Has racks 48a and 49a that mesh with the gear 50.
The second arms 51 and 52 are pivotally supported by the first arms 46 and 47, and the second arms 51 and 52 are provided with pins 51a and 52a.
And bosses 51b and 52b, respectively.
6, 47 have stopper portions 46b, 47b. Pin 5
1a and 52a are located in the conveyance path of the CD (small diameter disc SD or large diameter disc LD), and the bosses 51b and 52b
Are engaged with guide holes 53 and 54 provided in the sub-chassis 45. The guide holes 53 and 54 are formed in a substantially arc shape, but have hook portions 53a and 54a at one end.

A moving bracket 55 and a lock lever 56 are arranged behind the first arm 46 on the left side. The moving bracket 55 is supported by the sub-chassis 45 so as to be able to move forward and backward, and is urged toward the near side by a spring (not shown). The lock lever 56 is operated by a cam mechanism (not shown) or the like to hold the moving bracket 55 at the retracted position. A detection lever 57 is supported by the movable bracket 55 so as to be rotatable about a shaft 57a. The detection lever 57 has a guide pin 57b at one end, and the guide pin 57b is located in the transport path of the MD. Also, the detection lever 5
7 has a boss 57c at the other end, and the boss 57c is engaged with a cam hole 58 provided in the sub-chassis 45. The cam hole 58 has an arc-shaped portion 58a and a relief portion 58b, and the central axis of the arc-shaped portion 58a is the axis 5 of the detection lever 57.
7a, and the relief portion 58b has an arc-shaped portion 58a.
Extends obliquely rearward from one end. Moving bracket 55
Is mounted with a first detection switch 59, and the first detection switch 59 is operated by rotation of the detection lever 57. Also, the second detection switch 6 is
0 is attached, and the second detection switch 60 is operated by moving the moving bracket 55 back and forth. The two detection switches 59 and 60 are used to determine the type of the inserted medium. When the first detection switch 59 is turned on, it is determined that the medium is a CD, and the second detection switch 60 is used.
Is determined to be MD when is turned on.

In the judgment means configured as described above,
17 to 19 show the loading operation of the MD. In this case, when the MD is inserted from the MD insertion portion of the insertion opening (not shown), the leading end surface of the MD in the insertion direction is It hits the guide pin 57b. When the MD is further pushed in, the pushing amount of the MD is transmitted to the moving bracket 55 via the detection lever 57,
The moving bracket 55 is retracted and the second detection switch 60
Is turned on, it is determined that the inserted medium is an MD at this time. At this time, the detection lever 57
Since the boss 57c moves the escape portion 58b of the cam hole 58, if the MD is further pushed in after the second detection switch 60 is turned on, the detection lever 57 rotates clockwise as shown in FIG. The pin 57b retracts to the side of the MD. Further, the lock lever 56 is connected to the moving bracket 5.
5, the moving bracket 55 is held at the retracted position as shown in FIG. 19 while the MD is conveyed to the play position and stopped based on the determination result of the MD.

FIGS. 20 and 21 show the loading operation of the large-diameter disc LD.
When D is inserted from the CD insertion part of the insertion slot not shown,
As shown in FIG. 20, the leading ends of the large-diameter disc LD in the insertion direction abut the pins 51a, 52a and the guide pins 57b, and the second arms 51, 52 start rotating. When the large-diameter disc LD is further inserted into the back, the detection lever 57 is centered on the shaft 57a due to the angle relationship between the normal line at the contact point of the large-diameter disc LD with the guide pin 57b and the line connecting the shaft 57a and the guide pin 57b. Then, the first detection switch 59 is turned on to thereby determine that the disc is a CD. The large-diameter disc LD is transported to the play position shown in FIG. 21 on the basis of this determination result. During the transport, the second arms 51 and 52 are moved by the stoppers 46b and 4
7b, the two first arms 46, 47
Since the sliders 48 and 49a rotate about the gears a and 47a, the sliders 48 and 49 meshing with each other via the gear 50 move in opposite directions, and the pins 51a and 52a are opened evenly with the transport of the large-diameter disc LD. Therefore, the large-diameter disc LD moves to the back while being centered in the left-right direction.

FIGS. 22 to 24 show the loading operation of the small-diameter disk SD. In this case, when the small-diameter disk SD is inserted to the left of the center of the CD insertion portion as shown in FIG. The leading end of the disc SD in the insertion direction abuts on the left pin 51a, and the left second pin 51a.
The arm 51 rotates and comes into contact with the stopper 46b. As a result, the slider 48 connected to the first arm 46 on the left tries to move to the left, but the second arm 5 on the right
Since the rotation of the first arm 47 on the right side is locked while the second boss 52b is locked by the locking portion 54a of the guide hole 54, the second arm 51 on the left side cannot be further rotated. Therefore, when the small-diameter disk SD is further inserted, the small-diameter disk SD is moved to the right while contacting the left pin 51a, and when the small-diameter disk SD is centered at the center of the CD insertion portion, the left and right pins 51a , 52a. Conversely, as shown in FIG. 23, when the small-diameter disk SD is inserted in a state shifted to the right with respect to the center of the CD insertion portion, the distal end side of the small-diameter disk SD in the insertion direction abuts the right pin 52a, and The two arms 52 rotate to stop the stopper 47b.
Abut. This causes the right slider 49 to move to the right, but the boss 51 of the second arm 51 on the left.
Since the rotation of the first arm 46 on the left side is locked by the locking of the hook 53b by the locking portion 53a, the second arm 52 on the right side cannot be further rotated. Therefore, when the small-diameter disk SD is further inserted, the small-diameter disk SD is moved to the left while contacting the right pin 52a,
When the small-diameter disk SD is centered at the center of the CD insertion portion, it hits both left and right pins 51a and 52a.

When the centering is performed in this manner, the front ends of the small-diameter discs SD in the insertion direction are both pins 51a, 51a.
2a and the guide pin 57b, and when the small-diameter disk SD is further inserted in this state, the same operation as that of the above-described large-diameter disk LD is performed. That is, as shown by the solid line in FIG. 24, the insertion of the small-diameter disk SD causes the two second arms 51 and 52 to start rotating, and the detection lever 57 rotates clockwise about the shaft 57a. The switch 59 is turned on to determine that the disc is a CD. Based on this determination result, the small-diameter disk SD is transported to the play position indicated by the two-dot chain line in FIG. 24, and during the transport, both pins 51a and 52a are opened evenly.

In the modification shown in FIG. 25, the determination means comprises a first rotating arm 62 for supporting the transport roller 61, a second rotating arm 64 for supporting the driven roller 63,
And a detection switch 65 attached to the rotation arm 62 of the rotation arm 62. The rotation arms 62 and 64 are rotatably connected about a support shaft 66, and are urged in directions approaching each other by a spring 67. I have. The transport roller 61 and the driven roller 63 are disposed behind an insertion port (not shown), and a CD or MD inserted from the insertion port (right side in the figure) is sandwiched between the transport roller 61 and the driven roller 63. It is conveyed inside by the rotational driving force of the conveying roller 61. Therefore, the transport roller 61 and the driven roller 63
Is preferably formed of an elastic material.
The transport roller 61 that contacts the recording surface of D needs to be formed of a rubber roller. The detection switch 65 is used to determine the type of the inserted medium. When the detection switch 65 is in the ON state, it is determined that the medium is a CD.
When 6 is in the off state, it is determined to be MD.

In the determining means configured as described above,
When the MD is inserted from the MD insertion portion of the insertion opening (not shown), as shown in FIG. 25A, the leading end surface of the MD in the insertion direction enters between the transport roller 61 and the driven roller 63, and the second rotation is performed. The moving arm 64 rotates upward about the support shaft 66. In this case, the thickness dimension of the MD (usually 4.8 to
5.2 mm) is the CD thickness dimension (typically 1.2 to 1.5).
mm), the second pivot arm 6
4 rotates at a large opening angle with respect to the first rotating arm 62, whereby the detection switch 65 is turned off and it is determined that the MD is set. On the other hand, when the CD is inserted from the CD insertion portion of the insertion opening (not shown), the leading end surface of the CD in the insertion direction enters between the transport roller 61 and the driven roller 63, as shown in FIG. The rotating arm 64 rotates upward about the support shaft 66. In this case, the thickness dimension of the CD (small diameter disc SD or large diameter disc LD) is M
D is sufficiently small compared to the thickness dimension of D, the second rotating arm 64 rotates only at a small opening angle with respect to the first rotating arm 62, and the first rotating arm 62 is Since it is drawn to the second rotating arm 64 side by the spring force of 67, the detection switch 65 is kept on, and it is determined that the inserted medium is a CD.

[0046]

The present invention is embodied in the form described above and has the following effects.

When a moving bracket for positioning the front end side of the disk-shaped recording medium in the insertion direction is provided, and the recording medium is conveyed by the rotational force of the rollers while moving the moving bracket, the recording medium may be conveyed in a cantilevered state. Therefore, even if vibration is applied from the outside while the recording medium is being conveyed, the recording medium can be prevented from colliding with the turntable and other mechanism parts and being damaged.

[Brief description of the drawings]

FIG. 1 is a front view of a recording medium driving device according to an embodiment of the present invention.

FIG. 2 is a plan view of a table switching mechanism mounted on a main chassis.

FIG. 3 is a side view of the table switching mechanism.

FIG. 4 is a plan view of a shutter opening / closing mechanism.

FIG. 5 is a side view of the shutter opening / closing mechanism.

FIG. 6 is a plan view showing a loading state of an 8 cm CD.

FIG. 7 is a front view showing a loading state of an 8 cm CD.

FIG. 8 is a plan view showing a playing state of an 8 cm CD.

FIG. 9 is a front view showing a playing state of an 8 cm CD.

FIG. 10 is a plan view showing a loading state of a 12 cm CD.

FIG. 11 is a plan view showing a playing state of a 12 cm CD.

FIG. 12 is a plan view showing a loading state of the MD.

FIG. 13 is a front view showing a loading state of the MD.

FIG. 14 is a plan view showing a playing state of an MD.

FIG. 15 is a front view showing an MD playing state.

FIG. 16 is a flowchart illustrating a CD and MD playing operation.

FIG. 17 is a main part configuration diagram showing a modification of the determination means.

FIG. 18 is a plan view showing the loading of the MD.

FIG. 19 is a plan view showing an MD playing state.

FIG. 20 is a plan view showing the loading of a 12 cm CD.

FIG. 21 is a plan view showing a playing state of a 12 cm CD.

FIG. 22 is a plan view showing the centering operation of the 8 cm CD.

FIG. 23 is a plan view showing the centering operation of the 8 cm CD.

FIG. 24 is a plan view showing an 8 cm CD loading operation.

FIG. 25 is an explanatory diagram showing another modified example of the determining means.

[Explanation of symbols]

 Reference Signs List 1 frame 2 main chassis 3 sub-chassis 4 arm clamp 5 front plate 6 insertion slot 6a CD insertion section 6b MD insertion section 11 optical pickup 14 spindle motor 15 drive shaft 18 CD turntable 19 MD turntable 24 clamper 25 drive lever 27 Holder (moving bracket) 29, 30 CD detection lever 31 Detection switch 32 Lock slider 34 Release lever 35, 38 Rotating lever 35b, 38a Positioning pin 36 Link lever 39, 40 Positioning pin 39a, 40a Flanged portion with groove 43 Roller CD recoding media

Claims (10)

[Claims] 1. A recording medium comprising: a roller for conveying a disk-shaped recording medium; a movable bracket disposed on the back side of the roller and capable of moving forward and backward; and a positioning member provided on the movable bracket. A recording medium driving device for moving the moving bracket forward and backward and rotating the roller to convey the recording medium in a state in which a peripheral edge of the recording medium is in contact with the positioning member. 2. The recording medium driving device according to claim 1, wherein the positioning member has a groove for positioning the recording medium in a thickness direction. 3. The recording medium drive according to claim 1, wherein a moving speed of the moving bracket and a rotating speed of the roller are set so that the recording medium is pressed against the positioning member. apparatus. 4. The recording medium drive according to claim 1, wherein the positioning member is provided on a pair of levers rotatably supported by the movable bracket. 5. The recording medium according to claim 4, wherein a positioning member is provided on each of the pair of rotating levers biased in a direction approaching each other, and a peripheral edge of the recording medium is moved between the two levers and the two rotating levers. A recording medium driving device characterized in that it is brought into contact with a positioning member. 6. A stopper according to claim 4, wherein a stopper member capable of restricting an opening angle of both levers is provided,
When the recording medium is a large-diameter disk, the stopper member is operated during movement of the moving bracket to make both levers rotatable. When the recording medium is a small-diameter disk, the moving bracket moves. The recording medium driving device, wherein the rotation of both levers is locked by the stopper member during the rotation. 7. The recording medium drive according to claim 6, wherein a lock release mechanism for operating the stopper member is interlocked with the rotation of the two rotation levers. 8. A recording medium drive according to claim 1, wherein said movable bracket is a holder for positioning and holding a second recording medium different from said recording medium. . 9. The recording medium drive according to claim 8, wherein the second recording medium is a mini-disc having a magneto-optical disc stored in a cartridge case. 10. The recording medium drive according to claim 8, wherein the length of the holder in the front-rear direction is set smaller than the diameter of the recording medium.