JP2000339836A - Driving device for recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect an inner periphery position of an optical pickup for two kinds of media with one limit switch. SOLUTION: A drive unit is movable between respective recording position and reproducing position of a CD and a MD, supports an optical pickup 54 on it so as to be movable both ways, and mounts a pair of lever members 59, 60 operated by the optical pickup 54. The lever members are energized in the direction in which they are separated from each other by a spring 62, a limit switch 61 opposing to an operation part 60a of the lever member 60 of the other side is attached to one side of the lever member 59. When one end part of the optical pickup 54 presses a receiving part of the lever member 59 of one side at the time of recording/reproducing operation of a CD, the limit switch 61 approaches the operation part and turned on, and an inner periphery end position of the optical pickup for a CD is detected by an on-signal. In the same way at the time of operation of a MD, the limit switch 61 approaches the operation part and turned on, and an inner periphery end position of the optical pickup 54 for a MD is detected by an on-signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium capable of recording and / or reproducing information on and from two types of media represented by a compact disk (CD) and a mini disk (MD) by a common optical pickup. The present invention relates to a medium drive device.

[0002]

2. Description of the Related Art In recent years, types of on-vehicle electronic devices have been diversified. For example, in addition to CD (compact disk) players and MD (mini disk) players, many electronic devices such as navigation systems and liquid crystal displays have been used. There is a request to install. In this case, when the mechanisms of the CD player and the MD player are installed in a stacked state, as is generally performed, a significant portion of the effective space is occupied by these two types of players, and other electronic devices are not used. However, there is a problem that the space for installing the device is greatly restricted.

In view of the above, a recording medium driving apparatus has been proposed in which mechanisms of a CD player and an MD player are integrated and information can be reproduced from both the CD and MD media using a common optical pickup. . This product inserts CD and MD separately on the front of the device body.
Two insertion openings are provided for discharging, and both insertion openings are vertically displaced. A mechanical chassis is disposed inside the apparatus main body, and a holding member for supporting the MD cartridge case inserted from the MD insertion slot is fixed to the mechanical chassis.
A drive unit is vertically and rotatably supported by the mechanical chassis, and a CD turntable, an MD turntable, and an optical pickup are mounted on the drive unit. Each turntable is rotationally driven by a dedicated motor, and the optical pickup reciprocates between the two turntables by a transfer mechanism using a sled motor as a drive source.

[0004] In the recording medium drive device thus constructed, when a CD is inserted from the CD insertion slot and transported to the CD play position, the drive unit rotates, for example, by a predetermined angle before and after this operation. By ascending, the drive unit moves obliquely upward to the CD play position, and the optical pickup mounted on the drive unit faces the lower surface of the CD. At this CD play position, the CD is rotated and driven by a CD turntable mounted on a drive unit, and the optical pickup is moved to the CD.
, The information recorded on the CD is reproduced. On the other hand, when the MD is inserted from the MD insertion slot and transported to the MD play position, the MD cartridge case is supported by the holding member, and before and after this operation, the drive unit rotates down by a predetermined angle and descends. The optical pickup moves to the lower MD play position and the optical pickup faces the lower surface of the MD. At this MD play position, the disc stored in the cartridge case is driven to rotate by the MD turntable mounted on the drive unit, and the optical pickup is moved in the radial direction of the disc, so that the information recorded on the MD is obtained. Is played.

[0005]

When information is reproduced from both media (CD and MD) using a common optical pickup, it is necessary to detect the inner peripheral position of the optical pickup with respect to each medium. In the conventional recording medium driving apparatus described above, two limit switches mounted on a drive unit are operated by an optical pickup, and an inner peripheral position of the optical pickup is detected by an operation signal output from each limit switch. That is, a CD limit switch and an MD limit switch are mounted on both sides of the drive unit via an optical pickup, and at the time of reproducing a CD, the CD limit switch is operated at one end of the optical pickup in the transfer direction, and the MD
During playback of the optical pickup, the MD
By operating the limit switch for CD, CD and M
The inner peripheral position of the optical pickup with respect to D is detected. However, when two limit switches are installed facing each other via an optical pickup as described above,
The drive unit increases in size along the transfer direction of the optical pickup. In particular, since the drive unit is a movable member that moves between the CD play position and the MD play position, the width and depth of the entire apparatus depend on the movement space of the drive unit. There is a problem that miniaturization of dimensions is hindered.

The present invention has been made in view of the above problems, and has as its object to provide a recording medium driving device suitable for downsizing.

[0007]

SUMMARY OF THE INVENTION According to the present invention, one limit switch is operated when a pair of lever members come into contact with and separate from each other, and these two lever members are selectively driven in accordance with the moving direction of the optical pickup. And With this configuration, since the inner peripheral position of the optical pickup with respect to both media is detected by one limit switch, the drive unit can be reduced in size, and the entire device can be reduced in size including the width and depth dimensions. be able to.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a recording medium driving device according to the present invention,
A recording medium drive for recording and / or reproducing information on a first disc-shaped medium and a second medium containing a disc in a cartridge case by a common optical pickup, comprising: the optical pickup; A drive unit mounted with a transfer mechanism for transferring an optical pickup, the drive unit being movable between a recording and / or reproducing position of the first medium and a recording and / or reproducing position of the second medium, and moving to the drive unit A first lever member mounted on the drive unit and having a limit switch mounted thereon, a second lever member movably supported by the drive unit and having an operating portion for operating the limit switch; The limit switch and the actuating section are moved together by the first and second lever members. An urging member for urging the optical pickup in a direction away from the optical pickup, wherein one of the first and second lever members moves in accordance with the movement of the optical pickup in one direction, and the other direction of the optical pickup. When the other of the two lever members moves in accordance with the movement to the position, the limit switch and the operating section relatively approach to each other to operate the limit switch, and the optical pickup is moved to the first position. The medium or the second medium is configured to be detected as having reached the inner circumferential position.

The first medium is a disk-shaped recording medium such as a CD (compact disk) or a DVD (digital versatile disk), and the second medium is a cartridge case such as an MD (mini disk). Is a recording medium configured to house a disk therein.

According to the above arrangement, when the optical pickup is moved in one direction during recording / reproduction of the first or second medium, the optical pickup drives one of the two lever members to limit the movement. Since the switch is operated, the inner peripheral position of the optical pickup with respect to both media can be detected using one limit switch, and accordingly, the drive unit and the entire apparatus can be downsized.

In the above configuration, a first spindle motor for rotating and driving the first medium and a second spindle motor for rotating and driving the second medium are mounted on the drive unit, and the first and second spindle motors are mounted. It is preferable that the optical pickup be configured to reciprocate between them. According to this configuration, it is possible to increase the relative positional accuracy between the first and second media driven by the first and second spindle motors and the optical pickup.

Further, in the above configuration, the first and the second
It is preferable that each of the lever members is provided with a receiving portion projecting into the movement area of the optical pickup. According to this structure, both lever members can be directly driven by the optical pickup, so that there is no need to provide a coupling mechanism between the receiving portion and the lever member, and the structure can be simplified.

In the above configuration, both lever members may be rotatably supported by the drive unit. However, both lever members are slidably supported by the drive unit, and the sliding direction of both lever members and the transfer direction of the optical pickup are determined. Are preferably matched. In this case, the first lever member is provided with a mounting portion to which a limit switch is mounted on one end side, and a receiving portion on the other end side, and the second lever member is provided with a receiving portion. It is preferable that an operating portion is provided on one end side, and a receiving portion is provided on the other end side, and an intermediate portion of both lever members is overlapped and slidably supported by the drive unit. With this configuration, the movable space of both lever members can be reduced, which is effective in reducing the size of the drive unit.

[0014]

Embodiments will be described with reference to the drawings.
1 is a plan view of the recording medium driving device, FIG. 2 is a bottom view of the recording medium driving device, FIG. 3 is a front view of the recording medium driving device, and FIG.
5 is a right side view of the recording medium driving device, FIG. 5 is a sectional view taken along line AA of FIG. 4, FIG. 6 is a left side view of the recording medium driving device, FIG. 7 is an explanatory view of the MD, and FIG. FIG. 9 is a right side view of the main chassis, FIG. 10 is a left side view of the main chassis, FIG. 11 is an explanatory view of a roller unit, FIG. 12 is a right side view showing an operation mechanism of the roller unit, FIG. 13 is a left side view showing the operation mechanism of the roller unit, FIG. 14 is an exploded view showing members incorporated in the right side plate of the main chassis, and FIG. 15 is an exploded view showing members incorporated in the left side plate of the main chassis. Illustrated diagram, FIG.
FIG. 17 is an explanatory view of the operation of the right slide cam plate, FIG. 17 is an explanatory view of the operation of the left slide cam plate, FIG. 18 is a plan view of the drive unit and the holder during CD reproduction, FIG. 19 is a plan view of the drive unit, and FIG. FIG. 21 is a plan view of the drive unit at the time of MD recording / reproduction, FIG. 22 is a plan view of the sub-chassis, FIG. 23 is an explanatory view showing the operation mechanism of the slide lever, and FIG. Rear view, FIG. 25 is a plan view of a base, FIG. 26 is a plan view of a support, FIG. 27 is an operation explanatory view of a first locator pin, and FIG. 28 is an explanatory view of a first lever member and a second lever member. FIG. 29 is a view for explaining the operation of a limit switch using an optical pickup, and FIG.
FIG. 31 is a plan view of the holder in a state where the MD is inserted, FIG. 31 is a plan view of the holder in a state where the MD is inserted, FIG. 32 is an explanatory view showing the positional relationship between the drive unit and the holder, and FIG. FIG.

As shown in FIGS. 1 and 2, a recording medium driving device according to the present embodiment includes a frame 1 installed at a predetermined position in a vehicle (for example, in a console), and a frame 1 disposed inside the frame 1. The main chassis 2 provided, a drive unit 3 movable in the horizontal direction (X and Y directions in the drawing) and the vertical direction (Z direction in the drawing) with respect to the main chassis 2, and movable in the vertical direction with respect to the main chassis 2 And a pair of left and right slide cam plates 5, 6 for driving the drive unit 3, the holder 4, and the like.

The main chassis 2 is elastically supported by the frame 1 via elastic members 7 such as oil dampers arranged at four corners of the frame 1, and the main chassis 2 is selected by an unlocking mechanism described later. In this locked state, the main chassis 2 is fixedly supported on the frame 1 in this locked state. An arm clamp 8 is pivotably supported above the rear end of the main chassis 2, and a clamper 9 is rotatably held at the tip of the arm clamp 8. A pair of link levers 10a and 10b are pivotally supported on the front upper surface plate 2a of the main chassis 2, and one ends of the link levers 10a and 10b are connected to another link lever 10c. The other ends of the link levers 10a and 10b are connected to left and right slide cam plates 5 and 6, respectively.
Are connected via link levers 10a, 10b and 10c so as to move in opposite directions in the front-rear direction (Y direction). The amount of movement (movement position) of the slide cam plates 5 and 6 in the front-back direction is detected by detection means such as a linear position sensor (not shown).

As shown in FIG. 3, the front plate of the frame 1 has a CD.
The insertion slot 11 and the MD insertion slot 12 are opened, and the MD insertion slot 12 is located at the lower left of the CD insertion slot 11. CD
A CD (Compact Disc) 13 as a first medium is inserted and ejected from an insertion slot 11, and an MD (Mini Disc) 14 as a second medium is inserted and ejected from an MD insertion slot 12. ing. In the recording medium driving device of the present embodiment, the CD 13 and the MD 14 can be simultaneously accommodated in the frame 1 as described later. In this case, the CD 13 and the MD 14 are accommodated in a state where at least a part thereof overlaps with each other in a plane (a state where the CD 13 and the MD 14 overlap in the Z direction). As is well known, the CD 13 is a single optical disk, but as shown in FIG. 7, the MD 14 has a magneto-optical disk 14a rotatably housed in a synthetic resin cartridge case 14b. The cartridge case 14b is provided with a window hole 14g for exposing a part of the magneto-optical disk 14a and a shutter 14c for closing the window hole, and a locking groove 14d and a pair of locator holes 14e and 14f are provided at predetermined positions on the back surface.
Etc. are provided.

As shown in FIGS. 4 and 5, an engagement hole 15 is formed in the right side plate of the frame body 1.
Locking portion 15a extending in the direction
a has a large-diameter portion 15b and a small-diameter portion 15c located at both ends. On the right side plate of the frame 1, a bulging portion 1a surrounding the lock portion 15a is pressed inward, and a relief hole 1b surrounding the small diameter portion 15c is formed. A lock pin 16 can reciprocate in the Y direction within the engagement hole 15, and the lock pin 16 is implanted in the right slide cam plate 5. As shown in FIG. 6, a pair of engagement holes 17 are formed in the left side plate of the frame body 1. Each of the engagement holes 17 has a narrow lock portion 17a extending in the Y direction, It has a large diameter portion 17b and a small diameter portion 17c located at both ends of the portion 17a. Similarly to the right side plate, the swelling portion 1a surrounding the lock portion 17a is pressed inward on the left side plate of the frame body 1 and the escape hole 1b surrounding the small diameter portion 17c is formed. I have. The lock pins 18 can reciprocate in the Y direction in both the engagement holes 17, and these lock pins 18 are implanted in the left slide cam plate 6.

The above-described lock release mechanism is provided with each of the engagement holes 1.
When the lock pins 16 and 18 are engaged with the lock portions 15a and 17a, respectively, as shown in FIGS. 4 and 6, the main chassis Reference numeral 2 denotes a locked state fixedly supported by the frame 1. Further, from this locked state, the slide cam plates 5 and 6 slide and move, and the lock pin 1
6, 18 are large diameter portions 15b, 17b or small diameter portions 15c,
17c, the main chassis 2 becomes the elastic member 7
, An unlocked (unlocked) state elastically supported by the frame 1. The movable stroke amount (amplitude) of the main chassis 2 in the unlocked state is determined by the lock pins 16, 18 and the large diameter portions 15 b, 17 b or the small diameter portion 15.
The lock pins 16 and 18 are determined by the clearances defined between the peripheral edges of the lock pins 16 and 17c.
Is within the large diameter portions 15b and 17b, the movable stroke amount is about ± 3.5 to ± 2.6 mm, and the lock pins 16 and 1
The movable stroke amount is set to be about ± 1.5 mm when 8 is inside the small diameter portions 15c and 17c.

As shown in FIG. 8, a guide plate 19 made of synthetic resin is mounted on the back side of the upper plate 2a of the main chassis 2, and a plurality of detection switches 20 are mounted on the guide plate 19. A pair of rotatable detection levers 21, a pair of rack plates 22 that slide in conjunction with the rotation of both detection levers 21, and an idler gear 23 that meshes with both rack plates 22 are provided on the back surface of the upper plate 2a. And both detection levers 21 are mounted on both rack plates 22.
And an idler gear 23 for synchronous rotation. Detecting pins 21a are suspended from the ends of the two detecting levers 21, and these detecting pins 21a
9 reach the CD transport path defined below. Therefore, when CD13 is inserted from the CD insertion slot 11,
Since the peripheral edge of the CD 13 contacts the two detection pins 21a, both the detection levers 21 rotate by a predetermined angle. A cam portion 22a is formed on one rack plate 22, and each detection switch 20 is turned on / off by the cam portion 22a. Each detection switch 20 is selectively turned on and off in accordance with the amount of displacement of the rack plate 22 (that is, the amount of rotation of the detection lever 21), so that a combination of on / off signals output from each detection switch 20 Based on the size of the inserted CD13 (diameter 8 cm and diameter 12 cm
), And whether the CD 13 is in the inserted or ejected state. Each of the detection switches 20, the detection lever 21, the detection pin 21a, the rack plate 22, its cam portion 22a, and the idler gear 23 constitute a CD insertion detection means.

As shown in FIGS. 9 to 13, a roller unit 24 is supported at a front portion of the main chassis 2, and the roller unit 24 is provided on a lower surface of a guide plate (opposing member) 19 via a CD transport path. Are facing each other. The roller unit 24 includes a roller plate 26 having a roller motor 25 mounted on the back surface thereof,
Drive roller (conveying member) 27 rotatably supported by 6
And a pair of roller brackets 28 integrated on both sides of the roller plate 26.
5 is transmitted to the drive roller 27 via the reduction gear train 29. This roller unit 24
And the opposing member 19 constitute a CD transport mechanism. The support shaft 26a of the roller plate 26 is
Are rotatably supported by the left and right side plates, and are urged by a spring 30 in a direction away from the lower surface of the guide plate 19. Roller pins 28a are provided at the ends of both roller brackets 28. As described later, these roller pins 28a are operated by left and right slide cam plates 5 and 6, and the roller unit 24 rotates the support shaft 26a accordingly. It swings as the center. As is apparent from FIG. 33, the drive roller 27 (roller unit 24) is provided at a position overlapping the holder 4 in a plane.

As shown in FIG. 14, a first vertical hole 31a extending in the Z direction, a pair of second vertical holes 31b, and a horizontal hole 31c extending in the Y direction are formed in the right side plate of the main chassis 2. An escape hole 31d is formed at one end of the horizontal hole 31c. A shaft hole 31e is provided between the first vertical hole 31a and the second vertical hole 31b on the front side.
The support shaft 32a of the phase reversing lever 32 is rotatably supported in the shaft hole 31e. An auxiliary plate 33 is screwed to the outside of the right side plate of the main chassis 2 with a predetermined gap, and the above-mentioned right slide cam plate 5 is movably disposed in this gap. The slide cam plate 5 is provided with a first cam hole (first cam portion) 5a, a pair of second cam holes (second cam portions) 5b, and a third cam hole 5c. The second cam holes 5b are formed in the same shape. The slide cam plate 5 has the lock pin 16
And a pair of guide pins 5d are implanted outward, and a kicking pin 5e is implanted inward. Both guide pins 5d are engaged with guide holes 33a provided in the auxiliary plate 33, whereby the slide cam plate 5 is guided in the Y direction (the front-rear direction of the main chassis 2). The kicking pin 5e is inserted into the escape hole 31d and reaches the inside of the right side plate of the main chassis 2, and reciprocates in the horizontal hole 31c as the slide cam plate 5 moves in the front-back direction. Further, a cam plate 34 is screwed to a lower outer surface of the slide cam plate 5, and a part of the first cam hole 5a and the second cam hole 5b is covered by the cam plate 34. Stepped cam portion (third cam portion) 3 on the upper surface of cam plate 34
4a, and the roller pin 28a on the right side of the roller unit 24 is pressed against the cam portion 34a (see FIG. 12).

As shown in FIG. 15, a pair of first vertical holes 35a and second vertical holes 35b extending in the vertical direction are formed in the left side plate of the main chassis 2, and the first vertical hole 35b on the front side is formed. A guide pin 35c is implanted below the vertical hole 35a.
Further, a shaft hole 35d is provided between the first vertical hole 35a and the second vertical hole 35b on the rear side, and the support shaft 36a of the phase reversing lever 36 is rotatably provided in the shaft hole 35d. Supported. The above-mentioned left slide cam plate 6 is disposed outside the phase reversing lever 36. The slide cam plate 6 has a pair of first cam holes (first cam portions) 6a and a first cam portion 6a having the same shape. Two cam holes (second cam portions) 6b and guide holes 6c are provided. The guide hole 6c is engaged with a guide pin 35c of the main chassis 2, whereby the slide cam plate 6 is guided in the Y direction (the front-rear direction of the main chassis 2). Further, a stepped cam portion (third cam portion) 6 is provided on the upper surface on the front side of the slide cam plate 6.
The roller pin 28a on the left side of the roller unit 24 is pressed against the cam portion 6d (see FIG. 13).

As shown in FIG. 16, a pin 4 a provided on the right side of the holder 4 is
1a is connected to one end of the phase reversing lever 32, and a pin 32b provided at the other end of the phase reversing lever 32 is slidably inserted into the first cam hole 5a of the slide cam plate 5. Have been. The pair of pins 3a provided on the right side of the drive unit 3 is
Of the slide cam plate 5 through the second vertical hole 31b.
The pin 8a provided on the right side of the arm clamp 8 is inserted through the second vertical hole 31b of the main chassis 2 so that the third cam hole 5c of the slide cam plate 5 is inserted. Has been inserted. On the other hand, as shown in FIG. 17, a pair of pins 4b provided on the left side of the holder 4 is provided.
Are engaged with the first cam holes 6a of the slide cam plate 6 through the first vertical holes 35a of the main chassis 2 respectively. A pin 3b provided on the left side of the drive unit 3 is connected to one end of the phase reversing lever 36 through the second vertical hole 35b of the main chassis 2 and provided at the other end of the phase reversing lever 36. The inserted pin 36b is inserted into the second cam hole 6b of the slide cam plate 6.

As shown in FIG. 18, a drive motor 37 is mounted on the bottom plate of the main chassis 2, and the rotational force of the drive motor 37 is transmitted via a reduction gear train 38 to the rack portion 5 f of the right slide cam plate 5. It is transmitted to. Therefore, when the drive motor 37 rotates in either the forward or reverse direction, each link lever 10a, 10b, 10
The two slide cam plates 5 and 6 connected via c move forward and backward in opposite directions on both side plates of the main chassis 2 (see FIG. 1). The drive unit 3 and the holder 4 are arranged inside the main chassis 2. The drive unit 3, the holder 4 and the roller unit 24 are composed of the drive motor 37, the reduction gear train 38, the link levers 10a and 10b, 10c and a driving mechanism composed of both slide cam plates 5 and 6 in the vertical direction (Z
Direction). Hereinafter, these drive units 3
And details of the holder 4 will be described.

As shown in FIGS. 2 and 19 to 21, the drive unit 3 has a sub-chassis 39 and a drive chassis 40, and the drive chassis 40 is mounted on the sub-chassis 39. As shown in FIG. 22, the above-mentioned pins 3 are provided on the right and left sides of the sub-chassis 39.
a and 3b are implanted respectively, and these pins 3
The sub-chassis 39 moves in the vertical direction (Z direction) with respect to the main chassis 2 by driving the a and 3b in conjunction with the forward and backward movement of the left and right slide cam plates 5 and 6. Notches 39a and 39b are formed at the upper right corner and the lower left corner in FIG. 22 of the sub-chassis 39, respectively. The contact between the sub-chassis 39 and the drive motor 37 is avoided by the notch 39a at the upper right corner. , Cutout 39 in the lower left corner
The contact between the sub-chassis 39 and the holder 4 is avoided by b. A self-propelled rack 39g is provided on the sub-chassis 39 and extends in a diagonal direction. A pair of linear guide holes 39c and a semi-circular guide hole 39d extending in parallel with the self-propelled rack 39g are formed. ing.

A slide lever 41 and a rotation lever 42 are provided on the back surface of the sub-chassis 39, and a pair of support shafts suspended from the sub-chassis 39 are provided in a pair of long holes 41a formed in the slide lever 41. 39e is inserted.
The slide lever 41 is urged to the rear of the sub-chassis 39 by a spring 43. As shown in FIG.
The contact part 41b projecting upward is bent. The contact portion 41b is opposed to a kicking pin 5e provided on the right slide cam plate 5, and when the kicking pin 5e presses the contact portion 41b as the slide cam plate 5 moves forward, the slide portion slides. The lever 41 moves forward against the urging force of the spring 43. On the other hand, the rotation lever 42 is rotatably supported by a support shaft 39f vertically suspended from the sub-chassis 39. A pin 42a provided at one end of the rotation lever 42 has an L-shaped cam hole of the slide lever 41. 41c. Therefore, as the slide lever 41 moves forward and backward, the pin 42a moves in the cam hole 41c, and the rotary lever 42 rotates about the support shaft 39f. The other end of the rotary lever 42 is a driving unit 42b, and the driving unit 42b extends in the direction of the semicircular guide hole 39d of the sub-chassis 39.

As shown in FIG. 24, the drive chassis 40 includes a base 44 mounted on a sub-chassis 39.
And a support 45 mounted on the base 44. As shown in FIG. 25, a pair of guide pins 44 a is vertically provided on the base 44, and the guide pins 44 a are slidably inserted into the linear guide holes 39 c, respectively. It can reciprocate obliquely in a horizontal plane (XY plane) along the self-propelled rack 39g.
In this case, a part of the base 44 moves so as to cross the notch 39b of the sub-chassis 39. A driven gear train 46 is provided on the base 44, and the driven gear train 4
6, one gear 46a always meshes with the self-propelled rack 39g. Further, a shaft hole 44b and a pair of escape holes 44c are formed in the base 44, and a cam portion 44d which protrudes in a tapered shape is formed at a rear end thereof. The cam portion 44d is used as a support 4 for a first locator pin 48 described later.
5 functions as control means for controlling the amount of protrusion from

As shown in FIG. 26, a support 45 has a support shaft 45a and a pair of guide pins 45b suspended therefrom.
The support shaft 45a and the guide pin 45b are inserted into the shaft hole 44b and the escape hole 44c of the base 44, respectively. As shown in FIG. 2, one guide pin 45b is
Through the escape hole 44c of the sub-chassis 39, and reaches the semicircular guide hole 39d of the sub-chassis 39, and faces the driving portion 42b of the rotary lever 42 on the back surface of the sub-chassis 39. Therefore, when the drive unit 42b presses the guide pin 45b with the rotation of the rotation lever 42, the support 45
The base 44 is rotated on the base 44 by a predetermined angle (about 40 degrees in this embodiment) in a horizontal plane around the center a. Also in this case, the support 4
A part of 5 rotates so as to cross the notch 39b of the sub-chassis 39. A spring 47 is stretched between the base 44 and the support 45 (see FIG. 19), and the support 45 is urged by the spring 47 in a counterclockwise direction.

A cylindrical guide portion 45c is formed at the rear end of the support 45 so as to protrude therefrom, and the first locator pin 48 is vertically movable (movable in the protruding and retracting direction) into the guide portion 45c. The first locator pin 48 is held
A spring 49 is housed as an elastic member for urging the member downward (toward the base 44). The first locator pin 48 is for positioning the cartridge case 14b of the MD 14, and the amount of protrusion from the guide portion 45c changes as the support 45 rotates. That is, as shown in FIG. 27A, when the support 45 is rotated by a predetermined angle with respect to the base 44, the lower end of the first locator pin 48 is
Is in contact with the flat surface of the base 44 under the resilience of
The upper end of the first locator pin 48 hardly protrudes from the guide portion 45c. On the other hand, as shown in FIG. 27B, when the support 45 is in a state of being overlapped with the base 44 without rotating, the lower end of the first locator pin 48 is
4 rides on the cam portion 44d, compresses the spring 49, and the upper end of the first locator pin 48 projects greatly from the guide portion 45c. In addition, as described later,
When the CD 13 is reproduced, the first locator pin 48
(A), a sufficient clearance is secured between the upper end of the first locator pin 48 and the lower surface of the CD 13, and the recording surface of the CD 13 contacts and damages the first locator pin 48. Is reliably prevented. Further, the first locator pin 48 is used when recording / reproducing the MD 14.
Is in the protruding state shown in FIG. 27B, the upper end of the first locator pin 48 is sufficiently inserted into the locator hole 14e provided on the back side of the cartridge case 14b, and M
The positioning accuracy of D14 is improved.

Referring back to FIGS. 19 to 21, a thread motor 50 is mounted on the support 45, and a screw shaft 51 and a guide shaft 52 are supported in parallel with each other. The screw shaft 51 drives the thread motor 50. It rotates via a gear train 53 as a source. The rotation of the screw shaft 51 is transmitted to the optical pickup 54 via a female screw member (not shown), whereby the optical pickup 54 reciprocates along the screw shaft 51 and the guide shaft 52. The thread motor 50, the screw shaft 51 and the guide shaft 52,
The transmission mechanism of the optical pickup 54 is constituted by the gear train 53. A spindle motor 55 for CD and a spindle motor 56 for MD are mounted on the support 45 with the moving area of the optical pickup 54 interposed therebetween (see FIG. 24). A turntable 57 for CD and a turntable 58 for MD are mounted respectively. A drive gear 57a is integrally formed on the lower peripheral surface of the CD turntable 57. The drive gear 57a and one gear 46b of the driven gear train 46 provided on the base 44 The gears are selectively engaged with the rotation operation. The drive gear 57a, the driven gear train 46, and the self-propelled rack 39g constitute a horizontal movement mechanism for moving the drive chassis 40 (the base 44 and the support 45) in the horizontal direction on the sub-chassis 39 in the front-rear direction. Have been.

That is, as shown in FIG.
When 5 rotates relative to base 44 by a predetermined angle, drive gear 57a and gear 46b of driven gear train 46 are separated from each other, and the rotation of CD turntable 57 is not transmitted to driven gear train 46. From this state, the support 45 rotates counterclockwise, and as shown in FIG.
When the drive gear 57 reaches a position where the drive gear 57
a meshes with the gear 46b of the driven gear train 46. Therefore, when the CD turntable 57 rotates in one direction in this state, the rotation is transmitted from the driving gear 57a to the gear 46a of the driven gear train 46 via the gear 46b.
As shown in FIG. 21, the base 44 moves obliquely forward on the sub-chassis 39 along with the self-propelled rack 39g together with the support 45. When the CD turntable 57 rotates in the other direction in the state shown in FIG. 21, the base 44 returns to the position shown in FIG. 19 together with the support 45 using the rotation as a drive source, and the support 45 rotates clockwise at this position. , The drive gear 57a and the gear 46b of the driven gear train 46 are separated from each other as shown in FIG. Thus, the support 45
The device itself functions as a transmission mechanism for selectively transmitting the rotational force of the CD spindle motor 55 to the horizontal movement mechanism.

First and second lever members 59 and 60 are slidably disposed on the support 45, respectively.
The limit switch 61 is mounted on the first lever member 59. As shown in FIGS. 26 and 28, the first lever member 59 is formed in an L-shape, and has a mounting portion 5 at each end.
9a and a receiving portion 59b, and a pair of long holes 59c at an intermediate portion. Limit switch 6 on the mounting portion 59a
1, the receiving portion 59b extends into the moving area of the optical pickup 54 so as to face the right side surface of the optical pickup 54. Both long holes 59c are inserted into guide pins 45d erected on the support 45, so that the lever member 59 moves on the support 45 on both shafts 51, 45.
52 is slidable in the axial direction (the same direction as the moving direction of the optical pickup 54). The second lever member 60 is formed in an inverted L-shape, and has an operating portion 60 at each end.
a and the receiving portion 60b, and a pair of long holes 60c in the middle portion. The intermediate portion of the second lever member 60 is superimposed on the intermediate portion of the first lever member 59, and both lever members 5
9, 60 are urged by a spring 62 in a direction in which the mounting portion 59a and the operating portion 60a are separated from each other. The operating portion 60a faces the driving portion 61a of the limit switch 61, and the receiving portion 60b extends into the moving area of the optical pickup 54 so as to face the left side surface of the optical pickup 54. The two long holes 60c are provided with the guide pins 4
By being inserted into 5d, the second lever member 60 can also slide on the support 45 in the axial direction of the shafts 51 and 52 (the same direction as the moving direction of the optical pickup 54).

The limit switch 61 is connected to the CD 13 and the M
It is used to detect the position of the inner peripheral end of the optical pickup 54 with respect to D14, and is operated by moving the optical pickup 54 to one of the left and right ends. That is, as shown in FIG. 29A, when the optical pickup 54 is at a neutral position other than the ends of the screw shaft 51 and the guide shaft 52, the receiving portions 59b and 60b of both lever members 59 and 60 are connected to the optical pickup 54. Since the operating unit 60a is not pressing the driving unit 61a of the limit switch 61, the limit switch 61
Are kept off. As shown in FIG. 29B, when the optical pickup 54 is moved to a position near the right end and presses the receiving portion 59b of the first lever member 59, the first lever member 59 is moved to the second lever position. Member 60
, The limit switch 61 approaches the operating portion 60a and is turned on. Therefore,
With this ON signal, it is possible to detect that the optical pickup 54 has moved to the inner peripheral end position of the CD 13. Conversely, as shown in FIG. 29C, when the optical pickup 54 is moved to a position near the left end and presses the receiving portion 60b of the second lever member 60, the second lever member 60 is moved. Since the lever 60 moves to the left with respect to the first lever member 59, the operating unit 60a approaches the limit switch 61 and turns it on. Therefore, it is possible to detect from the ON signal that the optical pickup 54 has moved to the inner peripheral end position of the magneto-optical disk 14a of the MD 14. Whether the optical pickup 54 has moved to the inner circumference of the CD 13 or the inner circumference of the MD 14 depends on the rotation direction (current direction) of the sled motor 50 when the limit switch 61 is turned on. It can be done by watching. That is, the optical pickup 54 is moved to the inner peripheral end position of any media by the AND of the rotation direction of the sled motor 50 (the signal for observing the current direction) and the ON signal of the limit switch 61 in the control unit such as the microcomputer. Is determined.

As shown in FIGS. 30 and 31, the holder 4 comprises a holding portion 4c for holding the inserted MD 14, and a bridging portion 4d integrated with the holding portion 4c. As shown, the holding portion 4c is located in the space including the notch 39b of the sub-chassis 39, and the bridging portion 4d is located in the space between the front plate of the frame 1 and the sub-chassis 39. The above-mentioned pins 4a and 4b are implanted on the right side of the bridging portion 4d and the left side of the holding portion 4c, respectively, and these pins 4a and 4b are interlocked with the left and right slide cam plates 5 and 6 moving forward and backward. As a result, the holder 4 moves in the vertical direction (Z direction) with respect to the main chassis 2.

The MD motor 6 is mounted on the bridge 4d of the holder 4.
The rotation of the MD motor 63 is transmitted to a fan-shaped first lever 65 provided on the holding portion 4c via a reduction gear train 64. The first lever 65 is connected to the fourth lever 68 via the second lever 66 and the third lever 67.
Are connected, and a pin 68a provided at the tip of the fourth lever 68 is slidably inserted into a horizontal hole 69a of a slider 69 arranged in the holding portion 4c. A guide projection 69b is formed on the slider 69, and the guide projection 69b is engaged with a long groove 4e formed on the holding section 4c. Therefore, when the first lever 65 is rotated by the MD motor 63, the second and third levers 66 and 6 are rotated.
7, the fourth lever 68 rotates about the support shaft 68b, and the slider 69 moves forward and backward in the holding portion 4c along the long groove 4e. A pair of locking projections 69c are formed on both left and right inner walls of the slider 69, and these locking projections 69c are locking grooves 14d provided on both side surfaces of the cartridge case 14b of the MD 14 (see FIG. 7). Can be hooked up. MD motor 63, reduction gear train 64, first lever 65, second lever 66, third lever 67, fourth
The lever 68 and the slider 69 constitute an MD transport mechanism.

The first and second detection levers 70 and 71 are rotatably supported on the front side of the holder 4c of the holder 4 and three detection switches 72a, 72b and 72c are mounted. The first detection lever 70 is the inserted MD.
The second detection lever 71 is rotated by the cartridge case 14 b of the slider 14.
9b is rotated. The detection switch 72a is turned on by the rotation of the first detection lever 70, and the MD1
4 is detected. The detection switch 72b is turned on by the rotation of the second detection lever 71, and detects the load start or the ejection end of the MD 14. The detection switch 72c is turned on by the rotation of the fourth lever 68, and detects the load end of the MD. The first detection lever 70 and the detection switch 72a constitute an MD insertion detection unit.

FIG. 30 shows a state before the MD 14 is inserted. When the MD 14 is inserted from the MD insertion slot 12 in this state, the detection switch 72a is first turned on. At this time, the position of the slide cam plates 5 and 6 in the front-rear direction is detected by detection means such as the linear position sensor described above, and the lock pins 16 and 18 are respectively locked by the lock portions 15a and 15a.
The determination as to whether or not it is located within 17a is made by a microcomputer or the like. Here, when it is determined that the lock pins 16 and 18 are not located in the lock portions 15a and 17a, the drive motor 37 rotates to drive the slide cam plates 5 and 6, and the lock pins 16 and 18 are locked. Part 15a, 1
7a until the slide cam plates 5, 6
Is transported. Next, when the MD 14 is further pushed in from this state, the slider 69 in contact with the MD 14 is slightly retracted and the detection switch 72b is turned on, so that the MD motor 63 rotates in one direction based on this signal, M
Loading of D14 is started. MD motor 63
Is rotated in one direction, the rotation is transmitted to the fourth lever 68 via the reduction gear train 64 and each of the levers 65, 66, 67, and the fourth lever 68 starts rotating around the support shaft 68b. As a result, the slider 69 retreats along the long groove 4e. When the fourth lever 68 rotates to the recording / reproducing position shown in FIG. 31, the detection switch 72c is turned on, so that the MD motor 63 is stopped based on this signal,
The loading of D14 is completed. With this loading operation, the MD 14 causes the locking groove 14 d to move to the slider 6.
9 is transported to the recording / reproducing position of the holder 4 in a state of being hooked by the hooking projection 69c.
c is opened, and the magneto-optical disk 14a is exposed from the window hole 14g of the cartridge case 14b.

As shown in FIG. 32, a support lever 73 is rotatably supported at the lower left end of the holding portion 4c of the holder 4, and a second locator pin 74 is fixed to the tip of the support lever 73. ing. The second locator pin 74 cooperates with the first locator pin 48 to
The support lever 73 is biased downward (clockwise) by a spring (not shown). As will be described later, when the support 45 approaches the holding portion 4c as the drive unit 3 is raised, the support lever 73 is raised together with the second locator pin 74, and the second locator pin 74 is moved to the cartridge case of the MD 14. It is inserted into a locator hole 14f provided on the front side of 14b.

Next, the operation of the recording medium driving device configured as described above will be described.

First, a case where the CD 13 is reproduced from the standby state in which both the CD 13 and the MD 14 are ejected (not inserted) will be described. In this standby state,
The right slide cam plate 5 has moved to the position shown in FIG. 16B, and the left slide cam plate 6 has moved to the position shown in FIG. 17B. At this time, each pin 3a, 3b of the drive unit 3 is connected to the second vertical hole 31 of the main chassis 2.
b, 35b, each pin 4a, 4
Since b is located at the lower end of the first vertical holes 31a and 35a of the main chassis 2, the drive unit 3 moves to the raised position as shown in FIGS. 32 (b) and 33 (a),
The holder 4 moves to the lowered position and is located at a position facing the insertion port 12. Further, the right roller pin 28a of the roller unit 24 is pressed against an upper stage of a cam portion 34a formed on the cam plate 34, and the left roller pin 28a is pressed against an upper stage of a cam portion 6d formed on the slide cam plate 6. Therefore, the roller unit 24 is rotated upward, and the drive roller 27 is pressed against the guide plate 19. further,
As shown in FIGS. 4 and 6, the lock pins 16 and 18 provided on the left and right slide cam plates 5 and 6 respectively lock the lock portions 15a and 17a of the engagement holes 15 and 17 formed in the frame 1. Because of the engagement, the entire mechanism including the main chassis 2, the drive unit 3, the holder 4, and the like is in a locked state fixedly supported on the frame 1.

In this standby state, the abutting portion 41b of the slide lever 41 is pressed by the kicking pin 5e of the slide cam plate 5 (see FIG. 23), so that the slide lever 41 resists the urging force of the spring 43. And the rotary lever 42 rotates around the support shaft 39f accordingly. For this reason, the drive part 42b of the rotary lever 42 presses one guide pin 45b of the support 45, and as shown in FIG. 20, the support 45 has rotated about 40 degrees on the base 44 about the support shaft 45a. It is in a state. At that time, as described above, the drive unit 3
3A, the support 45 rotates above the holding portion 4c of the holder 4, and the rotated support 45
And the holding portion 4c are in a state of overlapping in a plane (see FIG. 18). That is, the drive unit 3 reaches a first position above the holder 4 and partially overlapping the holder 4. Further, as shown in FIG. 27A, the lower end of the first locator pin 48 shifts from the cam portion 44d of the base 44 to a flat surface with the rotation of the support 45, so that the first locator pin 48 Is retracted (submerged) by the spring force of the spring 49,
A sufficient clearance for transporting the CD 13 above the first locator pin 48 is secured.

In this standby state, the CD 13 is
When inserted from the insertion slot 11, both detection levers 21 are rotated by the inserted CD 13, and the roller motor 25 starts rotating in one direction based on the load start signal output from each detection switch 20. The drive roller 27 rotates via the row 29. Therefore, the CD 13 is automatically conveyed to the reproduction position while being held between the guide plate 19 and the drive roller 27 by the rotational force of the drive roller 27. At this time, as described above, the first
Locator pin 48 is retracted, and C
Since a sufficient clearance is secured between the lower surface (recording surface) of D13 and the first locator pin 48, it is possible to reliably prevent the first locator pin 48 from damaging the CD 13. Then, when the detection means (not shown) detects that the CD 13 has been transported to the reproduction position, the drive motor 37 starts rotating. By the rotation of the drive motor 37, the left and right slide cam plates 5, 6 are driven in opposite directions via the respective link levers 10a, 10b, 10c, and the right slide cam plate 5 reaches the position shown in FIG. Then, the left slide cam plate 6 moves to the position shown in FIG. As the slide cam plates 5 and 6 move, the lock pins 16 and 18 are engaged with the engagement holes 15 and 1.
7 to the large diameter portions 15b, 17b from the lock portions 15a, 17a.
And the lock pins 16, 18 and the large diameter portions 15b, 1
7b with a large clearance (± 3.5 ±±
(Approximately 2.6 mm), the entire mechanism is elastically supported by the frame 1 via the elastic member 7, and is in the first unlocked state where it can vibrate with a large movable stroke.

The rotation of the roller motor 25 is stopped when the CD 13 is transported to the reproducing position, whereby the CD
13 is a CD turntable 5 mounted on a support 45
Stop just above 7. Meanwhile, the second of the slide cam plate 5
The right pin 3a engaging with the cam hole 5b of the second vertical hole 3
1b, and the movement of the pin 36b engaged with the second cam hole 6b of the slide cam plate 6
As shown in FIG. 32 (a), the rotation is transmitted in reverse to the left pin 3b at 6 and the pin 3b moves to the upper end of the second vertical hole 35b.
33B, the drive unit 3 is slightly raised, and the CD turntable 57 is fitted into the center hole of the CD 13. At the same time, the pin 8 of the arm clamp 8
a moves to the rear end of the third cam hole 5c of the slide cam plate 5, and the pin 8a moves to the second vertical hole 31b of the main chassis 2.
In order to descend inside, the arm clamp 8 rotates downward. Further, both roller pins 28a of the roller unit 24
Moves to the lower part of the cam portions 34a and 6d, respectively.
The roller unit 24 is rotated downward by the elastic force of the spring 30, and the drive roller 27 is separated from the lower surface of the CD 13. As a result, the CD 13 is chucked between the clamper 9 and the CD turntable 57,
In this chucking completed state, the drive motor 37 stops. In this case, the right pin 4 of the holder 4
The pin 32b of the phase inversion lever 32 connected to the slide cam plate 5 moves in the horizontal portion of the first cam hole 5a of the slide cam plate 5,
Since the pin 4b on the right side of the holder 4 also moves in the horizontal portion of the first cam hole 6a of the slide cam plate 6, the holder 4 maintains the state of being kept at the lowered position, and the rotation of the roller unit 24 is 4 in the space above.

At this playback position, the CD spindle motor 55 is rotated, and the CD 13 is rotated while being chucked between the clamper 9 and the CD turntable 57, and the optical pickup 54 is moved in the radial direction of the CD 13 by the thread motor 50. By the transfer, the reproduction operation of the CD 13 is started. In this case, as shown in FIG. 29B, when the optical pickup 54 approaches the center of the CD 13 and presses the receiving portion 59b of the first lever member 59, the limit switch is moved with the movement of the first lever member 59. 6
1 is turned on by the operating unit 60a, so that CD1
3 can be detected that the optical pickup 54 has moved to the inner peripheral end position. As described above, such a CD1
In the reproducing operation of No. 3, since the entire mechanism is elastically supported with a large movable stroke amount (about ± 3.5 to ± 2.6 mm) in the frame 1, external vibration is directly transmitted to the optical pickup 54. As a result, it is possible to reliably prevent the occurrence of an obstacle such as a sound skip.

Next, from the standby state, the MD 14 is recorded / recorded.
The case of reproduction will be described. In this case, as described above, when the MD 14 is inserted from the MD insertion slot 12 and the cartridge case 14b reaches the entrance of the holding portion 4c of the holder 4, the detection switch 72a is turned on by the first detection lever 70. At this time, as described above, in the standby state, the lock pins 16, 18 provided on the slide cam plates 5, 6 lock the lock portions 15 of the engagement holes 15, 17.
a, 17a, the drive motor 37
Has been stopped.

When the MD 14 is further inserted in this state,
The locking groove 14d of the MD 14 is
c, the slider 69 is slightly pushed back by the MD 14, the detection switch 72b is turned on, and the MD motor 63 starts rotating based on this operation signal. When the fourth lever 68 rotates about the support shaft 68b with the rotation of the MD motor 63, the slider 69 retreats to the back of the holding portion 4c of the holder 4 along the long groove 4e, and the MD 14 engages with the locking groove 14d. Is automatically transported to the recording / reproducing position in a state where it is hooked on the hooking projection 69c of the slider 69. During the transport, the shutter 14c is opened and the magneto-optical disk 14a is removed from the window hole 14g of the cartridge case 14b. Exposed. When the MD 14 is transported to the recording / reproducing position, a load end signal is output from the detection switch 72c, and based on this signal, the MD motor 63
Stops. Further, the drive motor 37 starts rotating based on the load end signal from the detection switch 72c, and the right slide cam plate 5 moves backward from the position shown in FIG. 16B to the position shown in FIG. , The left slide cam plate 6 is moved from the position shown in FIG.
Since the drive unit 3 advances to the position shown in (e), the vertical relationship between the drive unit 3 and the holder 4 is reversed.

That is, the right slide cam plate 5 is
6 (b) to the position shown in FIG. 16 (c), and when the left slide cam plate 6 moves from the position shown in FIG. 17 (b) to the position shown in FIG. 17 (c), the kicking pin 5e of the slide cam plate 5 Is separated from the contact portion 41b of the slide lever 41, the slide lever 41 is retracted by the resilience of the spring 43, and the rotary lever 42 is accordingly moved in FIG.
Rotate clockwise 0. As a result, the rotating lever 4
The pressing of the guide pin 45b by the second drive unit 42b is released, and as shown in FIG. The drive gear 57a of the turntable 57 meshes with the gear 46b of the driven gear train 46. Further, as shown in FIG. 27B, the lower end of the first locator pin 48 is moved to the base 44 with the rotation of the support 45.
The top of the first locator pin 48 is guided by the guide portion 45c in order to ride on the cam portion 44d and compress the spring 49.
Projects greatly from

Subsequently, when the right slide cam plate 5 moves to the position shown in FIG. 16D and the left slide cam plate 6 moves to the position shown in FIG. 17D, each pin 3a of the drive unit 3 is moved. , 3b are shifted to the lower ends of the second vertical holes 31b, 35b of the main chassis 2, and each pin 4a, 4b of the holder 4 is connected to the first vertical hole 31 of the main chassis 2.
32 (c) and FIG.
As shown in FIG. 3C, the drive unit 3 moves to the lowered position, and the holder 4 moves to the raised position. Further, since both roller pins 28a of the roller unit 24 move to the upper stages of the cam portions 34a and 6d, respectively, and the roller unit 24 also rotates upward with the rise of the holder 4, the holder 4 may not contact the roller unit 24. This can be avoided, and the holder 4 can be further raised as compared with the case where the roller unit 24 remains at the position shown in FIG.
In this case, the support 45 is provided with the notch 39 of the sub-chassis 39.
b, the drive unit 3 and the holder 4
Because there is no overlapping part in the plane,
The relative positions of the two 3 and 4 in the vertical direction can be reversed. Then, the drive unit 3 is attached to the holder 4 in this manner.
Then, when the CD turntable 57 is rotated in this state, the rotation is transmitted from the drive gear 57a to the gear 46a of the driven gear train 46 via the gear 46b, as shown in FIG. The base 44 is the support 4
5 along with the self-propelled rack 39g along with the sub-chassis 39
The vehicle runs obliquely on the top and moves to the front of the main chassis 2. As a result, the MD turntable 58 mounted on the support 45 is located directly below the rotation center of the magneto-optical disk 14a of the MD 14. That is, the drive unit 3 reaches a position below the holder 4 so as to partially overlap the holder 4.

Subsequently, when the right slide cam plate 5 is retracted to the position shown in FIG. 16 (e) and the left slide cam plate 6 is advanced to the position shown in FIG. 17 (e), each pin 3a of the drive unit 3 is moved. , 3b are second vertical holes 31b,
Since it slightly rises from the lower end of 35b, as shown in FIGS. 32D and 33D, the drive unit 3 rises to reach the second position close to the holder 4. As a result, as shown in FIG. 27B, the protruding first locator pin 48 is inserted into the locator hole 14e provided on the back side of the cartridge case 14b, and at the same time, the support lever 73 is 45 lifted, the second
Is inserted into the locator hole 14f provided on the front side of the cartridge case 14b.
D14 is accurately positioned at the recording / reproducing position by both locator pins 48 and 74. Further, when the drive unit 3 rises and approaches the holder 4, the MD 1
No. 4, the metal hub of the magneto-optical disk 14a is magnetically attracted to the MD turntable 58, and the drive motor 37 is stopped in a state where the attracting is completed. Note that M
At the time point when D14 is conveyed to the recording / reproducing position, each lock pin 16, 1 is moved with the movement of both slide cam plates 5, 6.
8 moves to the small diameter portions 15c, 17c of the engagement holes 15, 17, and a relatively small clearance (± 1.5 mm) between each lock pin 16, 18 and the periphery of the small diameter portions 15c, 17c.
), The entire mechanism is elastically supported by the frame 1 via the elastic member 7 and enters the second unlocked state in which the mechanism can vibrate with a small movable stroke.

At this recording / reproducing position, the MD spindle motor 56 is rotated to rotate the MD 14 with the MD 14 attached to the MD turntable 58, and the optical pickup 54 is moved by the thread motor 50 to the magneto-optical disk 14.
a in the radial direction of a.
The reproduction operation is started. In this case, as shown in FIG. 29C, when the optical pickup 54 approaches the center of the MD 14 and presses the receiving portion 60b of the second lever member 60, the operating portion is moved with the movement of the second lever member 60. Since the limit switch 61 is turned on by the switch 60a, it is possible to detect that the optical pickup 54 has moved to the inner peripheral end position of the magneto-optical disk 14a of the MD 14. In addition, such MD14
During the recording / playback operation of
Relatively small movable stroke (± 1.5mm
Degree) and elastically supported.
Although the frequency of sound skipping caused by external vibrations is higher than that during the playback operation of the semiconductor memory, the FIFO (First-
Shock proof using In / First-Out) function
If a known memory device called a memory is used, MD1
4 can significantly improve the vibration resistance during the recording / reproducing operation.

The case where the CD 13 and the MD 14 are individually recorded / reproduced from the standby state has been described above.
It is also possible to accommodate both media 3 and MD14 in the mechanism at the same time and selectively record / reproduce one media, or insert or eject the other media while one media is in the recording / reproducing state. is there.

For example, when recording / reproducing the MD 14 instead of the CD 13 in the reproducing state, in the reproducing state of the CD 13, the holder 4 is located at the position facing the MD insertion slot 12 (see FIG. 33 (b)). M without discharging CD13
The MD 14 can be inserted from the D insertion port 12. When the MD 14 is inserted, as described above, the drive motor 37 starts rotating based on the detection signal from the detection switch 72a, and the right slide cam plate 5 moves from FIG. 16 (a) to FIG. 16 (b).
And the left slide cam plate 6 moves from the position shown in FIG. 17 (a) to the position shown in FIG. 17 (b). As a result, since the roller unit 24 rotates upward, the CD 13 is driven by the drive roller 27 and the guide plate 19.
, And remains in the mechanism. In addition, each lock pin 16, 18 is provided with an engagement hole 15, 1.
7 is engaged with the lock portions 15a and 17a, so that the entire mechanism is in a locked state fixedly supported with respect to the frame 1. After that, similarly to the recording / reproducing operation of the MD 14 from the standby state described above, the MD 14 is transported to the recording / reproducing position by the slider 69, and then the drive unit 3
Is moved below the holder 4 to reverse the vertical relationship between the two, so that the recording / reproducing operation of the MD 14 can be started without ejecting the CD 13. At the start of the insertion of the MD 14 (reproduction state of the CD 13), the entire mechanism is in the first unlocked state in which the frame 1 can vibrate with a large movable stroke amount. Since the magnetic disk 14a is protected by the cartridge case 14b made of a hard synthetic resin, the magneto-optical disk 14a will not be damaged even if the mechanism vibrates when the MD 14 is inserted. Note that the entire mechanism is locked while the MD 14 is being transported.
13 easily occurs, the use of the above-described shock-proof memory device can prevent the sound of the reproduced sound from being interrupted.
D14 can be inserted, and the usability for the user is improved.

On the contrary, the MD in the recording / reproducing state
When the CD 13 is reproduced in place of the CD 14, in the recording / reproducing state of the MD 14, the roller unit 24 is raised and the drive roller 27 is pressed against the guide plate 19 and the C
Since it is located at a position facing the D insertion port 11 (FIG. 33D)
), The CD 13 can be inserted from the CD insertion slot 11 without ejecting the MD 14. When the CD 13 is inserted, as described above, the drive motor 37 starts rotating based on the detection signal from each detection switch 20, and the right slide cam plate 5 is shown in FIGS. 16 (e) to 16 (b). At the same time, the left slide cam plate 6 moves from the position shown in FIG. 17 (e) to the position shown in FIG. 17 (b). As a result, each lock pin 16, 18 is locked by the lock portion 1 of the engagement hole 15, 17.
5a, 17a, the entire mechanism is frame 1
To a locked state fixedly supported. After that, similarly to the above-described reproducing operation of the CD 13 from the standby state, the CD 13 is transported to the reproducing position by the driving roller 27, and then the drive unit 3 is moved above the holder 4 to reverse the vertical relationship between the two. MD14
, The reproduction operation of the CD 13 can be started. It should be noted that the insertion start of the CD 13 (MD
14 recording / reproducing state), since the amplitude of the entire mechanism with respect to the frame 1 is in the second unlocked state defined by a small movable stroke amount, when the CD 13 is inserted from the CD insertion slot 11, The mechanism can be brought into the locked state without damaging the CD 13. Since the entire mechanism is locked while the CD 13 is transported, skipping of the reproduction sound of the MD 14 due to external vibration is likely to occur. However, as described above, the use of the shock proof memory device causes In addition, it is possible to prevent the reproduction sound from being interrupted, and thus it is possible to perform the operation of inserting the CD 13 while recording / reproducing the MD 14.

When both the CD 13 and the MD 14 are in the inserted state, the drive unit 3 and the holder 4 are operated by moving the slide cam plates 5 and 6 back and forth.
By appropriately reversing the relative positions of the two media in the Z direction, one of the media can be selectively recorded / reproduced while both media are accommodated in the mechanism at the same time. , The other medium can be ejected. When these operations are performed, the whole mechanism is temporarily locked, so that external vibrations are easily transmitted to the mechanism. However, if the signal is read ahead and read out by the shock proof memory device, the reproduced sound is reproduced. Cuts can be prevented, and silence during operation of the mechanism can be prevented.

[0056]

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

Information is recorded and / or recorded on a first disc-shaped medium and a second medium containing a disc in a cartridge case by a common optical pickup.
Alternatively, in a recording medium driving device for performing reproduction, one limit switch is operated by a pair of lever members coming and going, and both lever members are selectively driven in accordance with the transport direction of the optical pickup. , The inner circumference position of the optical pickup with respect to both media is 1
The detection can be performed by one limit switch, and the drive unit and the entire device can be reduced in size accordingly.

[Brief description of the drawings]

FIG. 1 is a plan view of a recording medium driving device according to an embodiment.

FIG. 2 is a bottom view of the recording medium driving device.

FIG. 3 is a front view of the recording medium driving device.

FIG. 4 is a right side view of the recording medium driving device.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a left side view of the recording medium driving device.

FIG. 7 is an explanatory diagram of an MD.

FIG. 8 is a plan view showing a CD detection mechanism.

FIG. 9 is a right side view of the main chassis.

FIG. 10 is a left side view of the main chassis.

FIG. 11 is an explanatory diagram of a roller unit.

FIG. 12 is a right side view illustrating an operation mechanism of the roller unit.

FIG. 13 is a left side view showing an operation mechanism of the roller unit.

FIG. 14 is an explanatory view showing exploded members incorporated in the right side plate of the main chassis.

FIG. 15 is an exploded view showing members to be incorporated in the left side plate of the main chassis.

FIG. 16 is an explanatory view of the operation of the right slide cam plate.

FIG. 17 is an operation explanatory view of the left slide cam plate.

FIG. 18 is a plan view of a drive unit and a holder during CD reproduction.

FIG. 19 is a plan view of the drive unit.

FIG. 20 is a plan view of the drive unit during CD reproduction.

FIG. 21 is a plan view of the drive unit during MD recording / reproduction.

FIG. 22 is a plan view of a sub-chassis.

FIG. 23 is an explanatory view showing an operation mechanism of the slide lever.

FIG. 24 is a rear view of the drive chassis.

FIG. 25 is a plan view of a base.

FIG. 26 is a plan view of a support.

FIG. 27 is an explanatory diagram of the operation of the first locator pin.

FIG. 28 is an explanatory diagram of a first lever member and a second lever member.

FIG. 29 is a diagram illustrating the operation of a limit switch using an optical pickup.

FIG. 30 is a plan view of the holder in an MD discharge state.

FIG. 31 is a plan view of the holder in an MD inserted state.

FIG. 32 is an explanatory diagram showing a positional relationship between a drive unit and a holder.

FIG. 33 is an explanatory diagram showing a positional relationship among a drive unit, a holder, and a roller unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 Main chassis 3 Drive unit 3a, 3b pin 4 Holder 4a, 4b pin 4c Holding part 4d Bridge part 5, 6 Slide cam plate 8 Arm clamp 11 CD insertion slot 12 MD insertion slot 13 CD (first media) 14 MD (second media) 15, 17 Engagement hole 15a, 17a Lock portion 15b, 17b Large diameter portion 15c, 17c Small diameter portion 16, 18 Lock pin 19 Guide plate 20 Detection switch 24 Roller unit 27 Drive roller 28 Roller bracket 28a Roller pins 32, 36 Phase inversion lever 33 Auxiliary plate 34 Cam plate 34a Cam portion 37 Drive motor 39 Subchassis 39a, 39b Notch 39g Self-propelled rack 40 Drive chassis 41 Slide lever 41b Contact portion 42 Rotary lever 42b Drive portion 43 Spring 44 Base 44d Cam part 45 Support 45c Guide part 46 Follower gear train 47 Spring 48 First locator pin 49 Spring 50 Thread motor 51 Screw shaft 52 Guide shaft 54 Optical pickup 55 Spindle motor for CD 56 Spindle motor for MD 57 CD Turntable 57a drive gear 58 MD turntable 59 first lever member 59a mounting portion 59b receiving portion 60 second lever member 60a operating portion 60b receiving portion 61 limit switch 63 MD motor 69 slider 72a, 72b, 72c detection Switch 73 support lever 74 second locator pin

Claims (5)

[Claims] 1. A common optical pickup for recording and / or recording information on a first disk-shaped medium and a second medium containing a disk in a cartridge case.
Or a recording medium drive for reproducing, wherein the optical pickup and a transport mechanism for transporting the optical pickup are mounted, and a recording and / or reproducing position of the first medium and a recording and / or reproducing position of the second medium are recorded.
Or a drive unit movable between a playback position, and movably supported by the drive unit,
A first lever member on which a limit switch is mounted, and movably supported by the drive unit;
A second unit having an operating unit for operating the limit switch;
A lever member, and an urging member for urging the first and second lever members in a direction in which the limit switch and the operating portion move away from each other, in response to movement of the optical pickup in one direction. The first
And one of the second lever member moves, and the other of the two lever members moves in response to the movement of the optical pickup in the other direction, so that the limit switch and the operating portion are moved. Wherein the limit switch is operated relatively close to each other to detect that the optical pickup has reached the inner peripheral position of the first medium or the second medium. . 2. The drive unit according to claim 1, wherein a first spindle motor for rotating and driving the first medium and a second spindle motor for rotating and driving the second medium are mounted on the drive unit. A recording medium driving device, wherein the optical pickup reciprocates between first and second spindle motors. 3. The recording medium according to claim 1, wherein the first and second lever members are each provided with a receiving portion projecting into a movement area of the optical pickup. Drive. 4. The device according to claim 3, wherein the first and second lever members are provided in the drive unit so as to be slidable, respectively, and the sliding direction of the two lever members and the moving direction of the optical pickup are matched. Recording medium driving device characterized by the above-mentioned. 5. The first lever member according to claim 4, wherein the first lever member has an attachment portion to which the limit switch is attached on one end side, and the receiving portion is provided on the other end side. The second lever member is provided with the operating portion at one end thereof,
The recording medium driving device, wherein the receiving portion is provided at the other end, and an intermediate portion between the first and second lever members is overlapped and slidably supported by the drive unit.