JP3694417B2 - Recording medium driving device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recording medium driving apparatus capable of recording and / or reproducing two types of media represented by CD (compact disc) and MD (mini disc) with a common optical pickup.
[0002]
[Prior art]
In recent years, the types of in-vehicle electronic devices have been diversified. For example, in addition to a CD (compact disc) player and an MD (mini disc) player, there is a demand to install many electronic devices such as a navigation system and a liquid crystal display. . In this case, if the mechanisms of the CD player and the MD player are installed in a stacked state as is generally done, a considerable part of the effective space is occupied by these two types of players, and other electronic devices There is a problem that the space for installing is greatly restricted.
[0003]
Therefore, a recording medium driving device has been proposed that integrates the mechanisms of a CD player and an MD player so that information can be reproduced from both CD and MD media using a common optical pickup. In this device, an insertion slot for inserting and ejecting CDs and MDs is opened on the front surface of the device main body, and a drive chassis capable of rotating around a rotation shaft is disposed inside the device main body. An optical pickup and its transfer mechanism are mounted on the drive chassis, and a CD turntable and an MD turntable are supported at predetermined intervals, and each turntable is rotated by a dedicated motor. It has become so.
[0004]
In the recording medium driving apparatus schematically configured as described above, when the CD is inserted from the insertion slot, the drive chassis rotates by a predetermined angle to move the CD turntable to the center position of the CD. By transferring the optical pickup in the radial direction with respect to the CD driven to rotate by the turntable, the information recorded on the CD is reproduced. When the MD is inserted from the insertion slot, the drive chassis rotates by a predetermined angle to move the MD turntable to the center position of the disk stored in the MD cartridge case, and is driven to rotate by the MD turntable. The information recorded on the MD is reproduced by moving the optical pickup in the radial direction with respect to the disc to be recorded.
[0005]
[Problems to be solved by the invention]
According to the above-described conventional recording medium driving device, information can be reproduced from both CD and MD media using a common optical pickup mounted on the drive chassis, so that the CD player and the MD player can have different mechanisms. Compared to the case where they are configured and laminated, the thickness (height) dimension of the entire device can be greatly reduced, and a space can be provided for installing other electronic devices accordingly. . However, a CD turntable and an MD turntable and a dedicated motor for rotating them are mounted on the drive chassis. By rotating the drive chassis in the same plane, the CD turntable and the MD turntable are mounted. Since the table is configured to move to a predetermined playback position, both CD and MD media cannot be inserted (accommodated) at the same time. For example, when playing an MD instead of a CD being played, There was a problem that the MD had to be inserted after the CD in the inserted state was once ejected, which was inconvenient.
[0006]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a recording medium driving apparatus capable of simultaneously storing two types of media and selectively recording or reproducing either one of the media.
[0007]
[Means for Solving the Problems]
The present invention elastically supports the first turntable for rotating the first medium on the main chassis side and the second turntable for rotating the second medium, and is movable relative to the main chassis. When an optical pickup and its transfer mechanism are mounted on the drive chassis side, and the drive chassis is brought close to the main chassis, the first or second bracket is positioned in pressure contact with the guide shaft of the optical pickup transfer mechanism. . If comprised in this way, since an optical pick-up can be moved with respect to both media with which the main chassis side was mounted | worn in the predetermined position, both media can be accommodated simultaneously and either one media can be selectively reproduced | regenerated. In addition, since the relative positional accuracy between the both media and the optical pickup is improved, the recording and / or reproducing operation of both media by the optical pickup can be performed reliably.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the recording medium driving apparatus of the present invention, the disk-shaped first medium and the second medium storing the disk in the cartridge case are recorded and / or reproduced by a common optical pickup. A first bracket on which a first turntable for rotationally driving the first medium is mounted; a second bracket on which a second turntable for rotationally driving the second medium is mounted; And a main chassis that elastically supports the second bracket via an elastic member, a first direction that contacts and separates from the main chassis, and a second direction that intersects the first direction. A drive chassis mounted with a transfer mechanism for transferring the optical pickup along a pair of guide shafts parallel to each other. When the Eve chassis moves in the first direction and approaches the main chassis, the first or second bracket is positioned by being pressed against the guide shaft by the elastic force of the elastic member. .
[0009]
The first medium is a disk-shaped recording medium such as a CD (compact disk), and the second medium is configured such that a disk is housed in a cartridge case such as an MD (mini disk). It is a recording medium.
[0010]
According to the above configuration, the drive chassis is moved in the first direction to move away from the main chassis, or at the same time after being moved away from the main chassis, the drive chassis is moved in the second direction, and the drive chassis is moved again to the first direction. The optical pickup can be selectively moved with respect to both media mounted at a predetermined position on the main chassis side by moving in the direction toward the main chassis, so that both media are placed in the apparatus. One of the media can be selected and recorded and / or played back while being accommodated at the same time, and the conventional operation of replacing each media becomes unnecessary, and the usability is very good. Also, when the drive chassis is brought close to the main chassis, the first or second bracket elastically supported on the main chassis side is pressed against the guide shaft of the optical pickup transfer mechanism mounted on the drive chassis side, Since the inclination of the first and second turntables and the inclination of the guide shaft are the same, the relative positional accuracy between both media and the optical pickup is improved, and the recording and / or reproducing operation of both media by the optical pickup can be performed. It can be done reliably.
[0011]
In the above configuration, it is preferable that the first or second bracket is press-contacted to the three locations of the both guide shafts. In this way, the relative positional accuracy between the two media and the optical pickup can be further increased by the principle of three-point support. It can be further enhanced.
[0012]
Further, in the above configuration, two positioning grooves and one flat portion are formed in each of the first and second brackets, both positioning grooves are pressed against one guide shaft, and the flat portion is attached to the other guide shaft. It is preferable to press-contact. With this configuration, even if there is a variation in the size between the guide shafts on the optical pickup transfer mechanism side, this variation is absorbed by pressing any part of the flat portion against the guide shaft, so reliability Will improve.
[0013]
【Example】
An embodiment will be described with reference to the drawings. FIG. 1 is a front view of a recording medium driving device, FIG. 2 is a plan view showing a locking mechanism, FIG. 3 is a plan view showing a CD playing state, and FIG. FIG. 5 is a side view showing the CD playing state, FIG. 6 is a plan view of the CD bracket, FIG. 7 is an explanatory view showing the connection state of the CD bracket and the drive chassis, and FIG. 8 is for MD. FIG. 9 is a plan view of the guide bracket, FIG. 10 is a front view of the guide bracket, FIG. 11 is a plan view of the drive chassis, FIG. 12 is a plan view showing the MD playing state, and FIG. It is a front view which shows a play state.
[0014]
The recording medium driving apparatus according to this embodiment is elastic through a frame body 1 installed at a predetermined position in a vehicle (for example, in a console) and a plurality of elastic members 2 such as oil dampers inside the frame body 1. , A drive chassis 4 disposed below the main chassis 3, and an arm clamp 5 disposed above the main chassis 3.
[0015]
As shown in FIG. 1, a CD insertion slot 7 and an MD insertion slot 8 are established in the front plate 6 that covers the front surface of the frame 1, and the MD insertion slot 8 is located at the lower left of the CD insertion slot 7. . A CD (compact disc) 9 as a first medium is inserted and ejected from the CD insertion slot 7, and an MD (mini disc) 10 as a second medium is inserted and ejected from the MD insertion slot 8. It has become. As is well known, the CD 9 is a single optical disk, but the MD 10 is a magneto-optical disk 10a housed in a cartridge case 10b made of synthetic resin, and a part of the magneto-optical disk 10a is stored in the cartridge case 10b. A shutter 10c that exposes and closes is provided (see FIG. 12).
[0016]
As shown in FIG. 2, the four corners of the main chassis 3 are elastically supported inside the frame body 1 via elastic members 2, and the main chassis 3 is selectively selected with respect to the frame body 1 by a lock mechanism. It is supposed to be locked. The lock mechanism is connected to a lock motor 11 attached to the frame body 1, a slider 13 that can be moved forward and backward to mesh with the lock motor 11 through a gear train 12, and a cam hole 13 a of the slider 13. A pair of locking arms 14 that rotate about the support shaft 14 a in conjunction with the forward and backward movement of the slider 13, and a pair of lock levers 15 that move forward and backward in conjunction with the rotation of the locking arm 14, Lock pins 16 provided at both ends of each lock lever 15 are opposed to locking pieces 17 provided at four positions on the front and rear sides of the main chassis 3. Each locking piece 17 is bent in a “U” shape in plan view, and as shown in FIG. 5, a groove 17 a having a “V” shape in a side view is formed at the tip of each locking piece 17.
[0017]
FIG. 2 shows the unlocked state of the main chassis 3. In this case, the lock pin 16 is disengaged from the groove 17 a of the locking piece 17, and the main chassis 3 is elastically attached to the frame body 1 through the elastic member 2. It is supported by. When the lock motor 11 rotates in one direction from this unlocked state, the slider 13, the lock arm 14 and the lock lever 15 move in the direction of the arrow in the figure, and the lock pin 16 engages with the groove 17 a of the locking piece 17. Therefore, the main chassis 3 is in a locked state in which the main chassis 3 is fixedly supported by the frame 1. When the locking motor 11 rotates in the other direction from the locked state, the slider 13, the locking arm 14 and the lock lever 15 move in the direction opposite to the arrow, and the main chassis 3 returns to the unlocked state shown in FIG.
[0018]
As shown in FIGS. 3 to 5, the arm clamp 5 and the roller 18 are disposed above the main chassis 3, and this roller 18 is located behind the CD insertion slot 7 and is driven to rotate by a motor (not shown). It has come to be. The arm clamp 5 is pivotally supported on the upper surface of the main chassis 3 and is rotated in conjunction with the lock lever 15 described above. A clamper 19 is rotatably held at the tip of the arm clamp 5, and a CD turntable 20 is disposed facing the clamper 19. A holder 21 for positioning and holding the MD 10 is fixed to the left side of the lower surface of the main chassis 3. The front opening end of the holder 21 is located in the back of the MD insertion slot 8, and the MD turn is placed on the lower surface of the holder 21. A table 22 is provided.
[0019]
As shown in FIGS. 6 and 7, the rotation shaft 23 of the CD turntable 20 is rotatably supported by the CD bracket 24. An internal gear 20a is formed on the lower surface of the CD turntable 20, and the drive gear 25a of the CD spindle motor 25 is engaged with the internal gear 20a. The CD bracket 24 is elastically supported by the main chassis 3. That is, locator portions 24 a are provided at three locations on the CD bracket 24, and each locator portion 24 a is inserted into a flanged stud 27 suspended from the holding plate 26, and is moved downward by the elastic force of the coil spring 28. It is energized. The holding plate 26 is a member fixed to the upper surface of the main chassis 3, and the CD turntable 20 is located directly below the clamper 19 through the opening 26 a of the holding plate 26. In the state, the CD 9 rotates while being chucked between the CD turntable 20 and the clamper 19. A pair of V-shaped positioning grooves 24b and one flat contact portion 24c are formed on the lower surface of the CD bracket 24, and both positioning grooves 24b are located on the same line at a predetermined distance. The contact portion 24c faces one positioning groove 24b with the CD turntable 20 interposed therebetween.
[0020]
As shown in FIG. 8, the MD turntable 22 is driven to rotate by an MD spindle motor 30 attached to an MD bracket 29, and the MD bracket 29 is fixed to the main chassis 3. The holder 21 is elastically supported on the lower surface. In other words, locator portions 29a are provided at two locations on the MD bracket 29, which are not shown, but each locator portion 29a is inserted into a flanged stud as in the case of the CD bracket 24 described above to be coil springs. It is urged | biased below the holder 21 by the elastic force of. Also, a pair of V-shaped positioning grooves 29b and one flat contact portion 29c are formed on the lower surface of the MD bracket 29, and both positioning grooves 29b are located on the same line at a predetermined distance. The abutting portion 29c faces one positioning groove 29b with the MD turntable 22 interposed therebetween.
[0021]
A pair of guide brackets 31 are fixed in front of and behind the main chassis 3, and the drive chassis 4 is disposed between the guide brackets 31. As shown in FIGS. 9 and 10, a pair of racks 32 and guide holes 33 are arranged in the left-right direction in the figure on the rear guide bracket 31. The rack 32 includes a long vertical portion 32a and a short vertical portion 32b extending in the vertical direction, and a horizontal portion 32c connecting the long vertical portion 32a and the short vertical portion 32b. ing. The guide hole 33 is formed in the bulging portion 31 a of the guide bracket 31 located outside the rack 32, has a similar shape to the rack 32, and is formed in a U shape as a whole. The front-side guide bracket 31 is formed with one rack 32 and one guide hole 33. The rack 32 and the guide hole 33 are also configured in the same manner as the rear-side guide bracket 31. In this way, by using one guide bracket 31 on the front side, it is possible to secure a conveyance path for the MD 10 inserted and ejected from the MD insertion port 8.
[0022]
As shown in FIG. 11, a moving motor 34 and a sled motor 35 are mounted on the drive chassis 4, and the rotational force of the moving motor 34 is moved forward and backward of the drive chassis 4 via a gear train 36 including a worm 36 a. It is transmitted to the moving gear 37 provided at three places. One of these movement gears 37 meshes with the rack 32 of the front guide bracket 31, and the remaining two movement gears 37 mesh with the rack 32 of the rear end guide bracket 31. A pin 37 a at the tip of the gear 37 is movably fitted in each guide hole 33 corresponding to the rack 32. Further, a screw shaft 38 is pivotally supported on the drive chassis 4, and the screw shaft 38 rotates via a gear train 39 using a thread motor 35 as a drive source. The rotation of the screw shaft 38 is transmitted to the optical pickup 40 via a female screw member (not shown), whereby the optical pickup 40 reciprocates along the main shaft 41 and the sub shaft 42 that are parallel to each other. The inner end position of is detected. The main shaft 41 and the sub shaft 42 are solid shafts having a circular cross section, and both ends of the main shaft 41 and the sub shaft 42 are fixed on the drive chassis 4 via supports 44 and 45.
[0023]
When the moving motor 34 rotates in either the forward or reverse direction, each moving gear 37 moves along the guide hole 33 while meshing with the rack 32, and the drive chassis 4 contacts and separates from the main chassis 3. Move in the direction and horizontal direction. In this case, when the moving gear 37 meshes with the long vertical portion 32a of the rack 32, the drive chassis 4 is in the first position where the optical pickup 40 faces the CD 9, and at this first position, the drive chassis 4 is in the CD position. As shown in FIG. 7, the two portions of the main shaft 41 enter the V-shaped positioning groove 24 b and the one portion of the sub-shaft 42 becomes a flat contact portion 24 c. At the end, in this state, the drive chassis 4 is further raised and stopped. As a result, the CD bracket 24 is pressed against the main shaft 41 and the sub shaft 42 by the elastic force of the coil spring 28, and the CD bracket 24 is attached to the CD bracket 24 by the principle of supporting the positioning grooves 24b and the abutting portions 24c in total. The mounted CD turntable 20 is maintained at the same inclination as the main shaft 41 and the sub shaft 42 fixed to the drive chassis 4. On the other hand, when the moving gear 37 meshes with the short vertical portion 32b of the rack 32, the drive chassis 4 is in the second position where the optical pickup 40 faces the MD 10, and at this second position, the drive chassis 4 is for the MD. It rises in a direction approaching the bracket 29. Also in this case, when the drive chassis 4 rises in a direction approaching the MD bracket 29, two locations of the main shaft 41 enter the V-shaped positioning groove 29b and one location of the sub shaft 42 is a flat contact portion. In this state, the drive chassis 4 further rises slightly and stops. As a result, the MD bracket 29 is pressed against the main shaft 41 and the subshaft 42 by the elastic force of a coil spring (not shown), and the MD bracket 29 is based on the principle of supporting both the positioning groove 29b and the contact portion 29c in total. The MD turntable 22 mounted on 29 is maintained at the same inclination as the main shaft 41 and the sub shaft 42 fixed to the drive chassis 4. Note that the contact point between the main shaft 41 and the brackets 24 and 29 of the sub-shaft 42 is outside the movement range of the optical pickup 40, so that the optical pickup 40 is connected to the brackets 24 and 29 during the recording or reproducing operation. No collision with 29.
[0024]
Returning to FIG. 3, a motor 46 for MD loading is attached to the left inner part of the main chassis 3, and a cam member 48 that rotates via the gear train 47 using the motor 46 as a drive source is placed on the main chassis 3. It is pivotally supported. The main chassis 3 has a long hole 49 extending in the front-rear direction. The bracket 50 slidably fitted in the long hole 49 is engaged with the long hole 48 a of the cam member 48. . A detection switch 51 that is operated by inserting the MD 10 is mounted on the bracket 50, and an MD loading motor 46 rotates based on an output signal from the detection switch 51. The bracket 50 is provided with a latching portion 52, and a recess formed in the MD 10 is latched on the latching portion 52, and the MD 10 is conveyed to a predetermined position in the holder 21 together with the bracket 50.
[0025]
FIG. 3 shows a state before the MD 10 is inserted. When the MD 10 is inserted from the MD insertion port 8 in this state, the insertion of the MD 10 is detected by the detection switch 51 and the MD loading motor 46 is moved in one direction. With rotation, the cam member 48 rotates in the direction of arrow A in the figure, and the bracket 50 moves back in the direction of arrow B in the figure along the long hole 49, so that the MD 10 is engaged with the latching portion 52 of the bracket 50. In the combined state, it is transported to a predetermined position in the holder 21, and the shutter 10c is opened during the transport to expose the magneto-optical disk 10a from the window hole 10d of the cartridge case 10b.
[0026]
Next, the operation of the recording medium driving apparatus configured as described above will be described.
[0027]
First, in a standby state in which both media of CD9 and MD10 are ejected (not inserted), each moving gear 37 is engaged with the horizontal portion 32c of the rack 32, and the drive chassis 4 is in the lowered position. At this time, the lock pin 16 is engaged with the groove 17 a of the locking piece 17, and the entire mechanism including the main chassis 3, the drive chassis 4 and the like is in a locked state in which it is fixedly supported with respect to the frame body 1. ing.
[0028]
When the CD 9 is reproduced from this standby state, when the CD 9 is inserted from the CD insertion slot 7, the insertion of the CD 9 is detected by a detection means such as a photo sensor (not shown), and the roller 18 is rotated based on this detection output. The CD 9 is conveyed to the inside by the force. When the center hole of the CD 9 comes to a position just above the CD turntable 20 that protrudes into the opening 26a of the holding plate 26, a transport END signal is output from a detection switch (not shown). The rotation stops, and the CD 9 stops just above the CD turntable 20 as shown in FIG. Further, the moving motor 34 rotates based on the transport END signal, and the moving gear 37 moves from the horizontal portion 32 c to the long vertical portion 32 a while meshing with the rack 32. When the moving motor 34 continues to rotate, the moving gear 37 rises while meshing with the long vertical portion 32a, and thus the drive chassis 4 moves to the raised position as shown in FIG. As the drive chassis 4 rises, the drive chassis 4 approaches the CD bracket 24. As described above, the positioning grooves 24b and the contact portions 24c of the CD bracket 24 are respectively connected to the main shaft 41 on the drive chassis 4. The CD 9 is chucked between the clamper 19 and the CD turntable 20 by being connected to the sub shaft 42 (see FIG. 7) and the CD bracket 24 being slightly lifted against the urging force of the coil spring 28. Thus, the moving motor 34 stops in this chucking completion state.
[0029]
Thereafter, or simultaneously with the rise of the drive chassis 4, the lock motor 11 rotates, so that the lock pin 16 is released from the groove 17 a of the locking piece 17 and is unlocked, and the main chassis 3, the drive chassis 4, etc. The entire mechanism is elastically supported by the frame 1 via the elastic member 2. Then, the CD turntable 20 is rotated by the CD spindle motor 25, and the optical pickup 40 is transferred in the radial direction of the CD9 by the sled motor 35, whereby the CD9 play operation is started. During the CD9 play operation, since the entire mechanism is elastically supported in the frame body 1, it is possible to prevent external vibration from being directly transmitted to the optical pickup 40 and causing troubles such as sound skipping.
[0030]
On the other hand, when reproducing the MD 10, when the MD 10 is inserted from the MD insertion slot 8, the detection switch 51 is turned on, and the MD loading motor 46 rotates based on the ON signal of the detection switch 51. When the cam member 48 is rotated in the direction of arrow A in FIG. 3 by the rotation of the motor 46, the bracket 50 is retracted in the direction of arrow B in FIG. The MD 10 to be carried is conveyed to the back of the holder 21, and the shutter 10c is opened during the conveyance, and the magneto-optical disk 10a is exposed from the window hole 10d of the cartridge case 10b. When the center of the magneto-optical disk 10a of the MD 10 reaches just above the MD turntable 22, a transport END signal is output from a detection switch (not shown), and the MD loading motor 46 is stopped based on this detection signal. Instead, the moving motor 34 starts to rotate.
[0031]
In this case, the moving gear 37 moves from the horizontal portion 32c to the short vertical portion 32b while meshing with the rack 32, and further rises along the short vertical portion 32b. Therefore, the drive chassis 4 is lifted as shown in FIG. Move to position. As the drive chassis 4 rises, the drive chassis 4 approaches the MD bracket 29. As described above, the positioning grooves 29b and the contact portions 29c of the MD bracket 29 are respectively connected to the main shaft 41 on the drive chassis 4. It is connected to the sub shaft 42. Then, when the MD bracket 29 is lifted against the urging force of the coil spring, the metal hub of the magneto-optical disk 10a of the MD 10 is magnetically attracted to the MD turntable 22, and moves in this adsorption completed state. The motor 34 stops. After that, or at the same time when the drive chassis 4 is raised, the lock motor 11 rotates to enter the unlocked state. In this state, the MD turntable 22 is rotated by the MD spindle motor 30, and the optical pickup is driven by the thread motor 35. By moving 40 in the radial direction of the CD 9, the play operation of the MD 10 is started.
[0032]
In the above embodiment, both media of CD9 and MD10 can be accommodated in the mechanism at the same time to selectively reproduce one medium, or the other medium can be inserted or ejected during the reproduction of one medium. it can. For example, when reproducing the MD 10 that is already accommodated in the holder 21 instead of the CD 9 that is in the play state, the drive chassis that has been in the raised position while the CD 9 remains mounted on the CD turntable 20. 4 moves down to the standby state, and then the moving gear 37 moves on the horizontal portion 32c of the rack 32, so that the drive chassis 4 moves horizontally to the position facing the MD 10, and then the moving gear. When 37 moves on the short vertical part 32b of the rack 32, the drive chassis 4 rises and the play operation of the MD 10 is started. At that time, as the drive chassis 4 is lowered, the positioning grooves 24b and the contact portions 24c of the CD bracket 24 are disengaged from the main shaft 41 and the sub shaft 42, and the CD turntable 20 mounted on the CD bracket 24 is removed. Following this, the clamper 19 also descends, and the chucked state of the CD 9 is maintained. In addition, when playing the CD 9 that has already been chucked by the CD turntable 20 and the clamper 19 instead of the MD 10 in the play state, the drive chassis 4 is temporarily held in the state in which the MD 10 is still housed in the holder 21. After moving down to the standby state, the moving gear 37 moves on the horizontal portion 32c and the long vertical portion 32a of the rack 32, whereby the drive chassis 4 rises again and the CD9 play operation is started. Therefore, by moving the drive chassis 4 up and down and horizontally while the CD 9 and the MD 10 are simultaneously accommodated in the frame 1, either one of the media can be selectively reproduced.
[0033]
In the above embodiment, when the drive chassis 4 is brought close to the main chassis 3, the positioning grooves 24 b and 29 b of the CD bracket 24 and the MD bracket 29 elastically supported by the main chassis 3 and Since the contact portions 24c and 29c are press-contacted to a total of three locations of the main shaft 41 and the sub shaft 42 of the optical pickup transfer mechanism, the inclination of both turntables 20 and 22 and the inclination of both shafts 41 and 42 are the same, The relative positional accuracy between both media (CD9 and MD10) and the optical pickup 40 can be increased, and a reliable recording and / or reproducing operation can be performed. At that time, the V-shaped positioning grooves 24b and 29b are pressed into contact with two locations of the main shaft 41, and the flat contact portions 24c and 29c are pressed into contact with one location of the sub shaft 42. Even if the dimension between the shafts 42 varies, the variation is absorbed when the contact points of the contact portions 24c and 29c with respect to the sub shaft 42 are shifted, and the reliability is improved.
[0034]
In the above embodiment, the case where the flanged stud and the coil spring are used as the structure for elastically supporting the CD bracket 24 and the MD bracket 29 on the main chassis 3 has been described. It is also possible to elastically support the CD bracket 24 and the MD bracket 29 on the main chassis 3 by using.
[0035]
【The invention's effect】
The present invention is implemented in the form as described above, and has the following effects.
[0036]
A drive chassis side that elastically supports the first turntable for rotating the first medium and the second turntable for rotating the second medium on the main chassis side, and is movable with respect to the main chassis. When the optical pickup and its transfer mechanism are mounted on the main chassis, and the drive chassis is brought close to the main chassis, the first or second bracket is positioned in contact with the guide shaft of the optical pickup transfer mechanism. Since the optical pickup can be moved with respect to both media mounted at a predetermined position on the side, it becomes possible to selectively record and / or reproduce one media while both media are accommodated at the same time. It is very convenient for the user. Also, when the drive chassis is brought close to the main chassis, the first or second bracket elastically supported on the main chassis side is pressed against the guide shaft of the optical pickup transfer mechanism mounted on the drive chassis side, Since the inclination of the first and second turntables and the inclination of the guide shaft are the same, the relative positional accuracy between both media and the optical pickup is improved, and the recording and / or reproducing operation of both media by the optical pickup can be performed. It can be done reliably.
[Brief description of the drawings]
FIG. 1 is a front view of a recording medium driving apparatus according to an embodiment.
FIG. 2 is a plan view showing a lock mechanism.
FIG. 3 is a plan view showing a CD play state.
FIG. 4 is a front view showing a playing state of a CD.
FIG. 5 is a side view showing a playing state of a CD.
FIG. 6 is a plan view of a CD bracket.
FIG. 7 is an explanatory diagram showing a connection state of a CD bracket and a drive chassis.
FIG. 8 is a plan view of a bracket for MD.
FIG. 9 is a plan view of a guide bracket.
FIG. 10 is a front view of a guide bracket.
FIG. 11 is a plan view of the drive chassis.
FIG. 12 is a plan view showing an MD play state.
FIG. 13 is a front view showing an MD play state.
[Explanation of symbols]
1 frame
3 Main chassis
4 Drive chassis
6 Front plate
7 CD insertion slot
8 MD insertion slot
9 CD (first media)
10 MD (second media)
19 Clamper
20 CD turntable (first turntable)
21 Holder
22 MD turntable (second turntable)
24 CD bracket
24b Positioning groove
24c Contact part (flat part)
25 Spindle motor for CD
26 Retaining plate
27 Stud with flange
28 Coil spring
29 MD Bracket
29b Positioning groove
29c Contact part (flat part)
30 MD spindle motor
31 Bracket for guide
32 racks
32a Long vertical part
32b Short vertical part
32c horizontal part
33 Guide hole
34 Motor for movement
35 thread motor
36 gear train
37 Moving gear
37a pin
40 Optical pickup
41 Main shaft
42 Subshaft

Claims (3)

In a recording medium driving apparatus in which a first optical disk and a second medium in which a disk is stored in a cartridge case are recorded and / or reproduced by a common optical pickup,
A first bracket on which a first turntable for rotationally driving the first medium is mounted; a second bracket on which a second turntable for rotationally driving the second medium is mounted; A main chassis that elastically supports the first and second brackets via an elastic member, a first direction that contacts and separates from the main chassis, and a second direction that intersects the first direction are movable. A drive chassis mounted with a transfer mechanism for transferring the optical pickup along a pair of guide shafts parallel to each other,
When the drive chassis moves in the first direction and approaches the main chassis, the first or second bracket is positioned by being pressed against the guide shaft by the elastic force of the elastic member. A recording medium driving device characterized by that. 2. The recording medium driving device according to claim 1, wherein the first or second bracket is brought into pressure contact with three portions of the both guide shafts. The two positioning grooves and one flat portion are formed in each of the first and second brackets, the two positioning grooves are pressed against one guide shaft, and the flat portion is connected to the other. A recording medium driving apparatus, wherein the recording medium driving apparatus is brought into pressure contact with the guide shaft.

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