JP3739577B2 - 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. For example, in the recording medium driving apparatus described in Japanese Patent Application Laid-Open No. 7-226006, a CD insertion slot and an MD insertion slot are opened in two stages on the front plate of the apparatus main body, and a holder and a drive are provided inside the apparatus main body. A chassis is disposed. The holder is fixed at a position facing the MD insertion slot, and supports the CD turntable and the MD turntable. The drive chassis can be moved up and down with respect to the holder. On this drive chassis, an optical pickup and its transfer mechanism are mounted, and a spindle motor that drives a CD turntable and an MD turntable is mounted.
[0004]
In the recording medium driving apparatus schematically configured as described above, when the CD is inserted from the upper CD insertion slot, the CD is conveyed to the CD turntable through the space above the holder, and at the same time, the drive chassis. And the spindle motor is connected to the CD turntable via the MD turntable. In this state, the optical pickup is transferred in the radial direction to the CD that is rotationally driven by the CD turntable. The recorded information is played back. When the MD is inserted from the lower MD insertion slot, the MD is conveyed to the MD turntable through the inside of the holder, the shutter is opened during the conveyance, and the magneto-optical disk is inserted from the window hole of the cartridge case. Exposed. At the same time, the drive chassis is raised and the spindle motor is connected to the MD turntable. In this state, the optical pickup is moved in the radial direction with respect to the MD that is rotationally driven by the MD turntable. Is played.
[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, since the CD and MD transport paths including the respective insertion openings are separated in the vertical direction via the holder, for example, when downsizing to 1 DIN standard size, a large part of the limited space in the height direction However, there is a problem that the entire mechanism must be complicated due to the exclusive use of the CD and MD transport paths.
[0006]
[Means for Solving the Problems]
According to the present invention, the types of the first medium and the second medium inserted from the common insertion slot are determined, and the holder for accommodating the second medium is selectively raised and lowered based on the determination result. . With this configuration, if it is determined that the first medium has been inserted, the first medium can be transported to a predetermined position without being obstructed by the holder if the holder is retracted from the transport path of the first medium. If it is determined that the second medium has been inserted, the second medium can be transported to a predetermined position within the holder by positioning the holder on the transport path of the second medium. .
[0007]
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 common insertion slot through which the first medium and the second medium are inserted or ejected; a holder disposed in the back of the insertion hole so as to be movable up and down; and a front side of the holder Inserted in Said Determination means for determining the type of media, A shutter for preventing insertion of the first and second media behind the determination means; When the determination means determines that the medium is the first medium, the holder is retracted with respect to the transport path of the first medium, The shutter is opened after the transport path of the first medium is secured; When the determination means determines that the medium is the second medium, the holder is positioned on the transport path of the second medium. After opening the shutter Configured.
[0008]
The first medium is a disk-shaped recording medium such as a CD (compact disk), and the second medium is a recording medium in which a disk is accommodated in a cartridge case such as an MD (mini disk). .
[0009]
With this configuration, since a part of the second media transport path can be used as the first media transport path, there is room in the height direction, and the entire mechanism is made smaller and thinner. Can be
[0010]
Further, a shutter for preventing the insertion of the first and second media is disposed behind the determination unit, and it is determined that the determination unit is the first medium or the second medium. A transport path for the first medium or the second medium is secured. Later, if the shutter is opened to allow insertion of the first and second media, the first media may accidentally collide with the holder, or the second media may be erroneously undesired. It can be surely prevented from colliding with parts. The shutter is preferably opened after the medium is determined by the determining means and after the lifting operation of the holder is completed. Thereby, it is possible to more reliably prevent an undesired insertion operation of each medium.
[0011]
Further, in the above configuration, the insertion port has a horizontally long first media insertion portion and a second media insertion portion protruding from the upper side thereof, and is located at the center of the first media insertion portion. On the other hand, the second media insertion portion is configured to be offset to the right side.
[0012]
Further, in the above configuration, a dustproof member for closing the insertion opening is provided, and the dustproof member has a first slit extending in a horizontal direction along the first media insertion portion, and the second media insertion portion. And a second slit extending in the vertical direction along the both ends.
[0013]
Various forms can be adopted as the determination means. For example, three detection elements such as light emitting / receiving elements and detection switches are arranged on the same line at predetermined intervals, and signals output from these detection elements The type of the inserted media can be determined according to. The above three detection elements are such that when one or two detection elements are inserted, the output signals of only one or two detection elements are switched, and when the second medium is inserted, the output signals of all the detection elements are switched. The arrangement position is set.
[0014]
Alternatively, the determination means includes a movable bracket capable of moving forward and backward, a detection lever rotatably supported by the movable bracket, a first detection switch operated by rotation of the detection lever, and the front and rear of the movable bracket. A second detection switch operated by advancing, wherein the detection lever is rotated by insertion of the first medium, and the moving bracket is retracted through the detection lever by insertion of the second medium. You may comprise as follows.
[0015]
Alternatively, the determination means includes a pair of rotating arms biased in directions close to each other, and a detection switch operated in accordance with an opening angle of the rotating arms, and the first and second media You may comprise so that the open angle of both said rotation arms may change according to the difference in the thickness dimension. In this case, if a rubber roller that contacts the lower surface of the first medium is supported by at least one of the both rotating arms, the recording surface provided on the lower surface of the first medium can be reliably prevented from being damaged.
[0016]
【Example】
1 is a front view of a recording medium driving apparatus, FIG. 2 is a plan view of a table switching mechanism mounted on a main chassis, and FIG. 3 is a plan view of the table switching mechanism. 4 is a plan view of the shutter opening / closing mechanism, FIG. 5 is a side view of the shutter opening / closing mechanism, FIG. 6 is a plan view showing an 8 cm CD loading state, and FIG. 7 is a front view showing an 8 cm CD loading state. Is a plan view showing the play state of 8 cm CD, FIG. 9 is a front view showing the play state of 8 cm CD, FIG. 10 is a plan view showing the loading state of 12 cm CD, FIG. 11 is a plan view showing the play state of 12 cm CD, and FIG. FIG. 13 is a front view showing an MD loading state, FIG. 14 is a plan view showing an MD playing state, and FIG. 15 is an MD playing state. Front view of the FIG. 16 is a flowchart for explaining the playback operation of the CD and MD.
[0017]
The recording medium driving apparatus according to the present embodiment includes a frame body 1 installed at a predetermined position in a vehicle (for example, in a console), a main chassis 2 disposed inside the frame body 1, and an upper portion of the main chassis 2. 1 and an arm clamp 4 disposed above the sub-chassis 3. As shown in FIG. 1, the front plate 5 that covers the front surface of the frame 1 has an insertion port. 6 has been established. The insertion slot 6 is composed of a horizontally long CD insertion portion 6a and an MD insertion portion 6b partially protruding from the upper side thereof, and the lower side region of the MD insertion portion 6b overlaps the central region of the CD insertion portion 6a. The insertion port 6 is opened in a convex shape as a whole. The back side of the insertion slot 6 is closed by a dustproof member 7 made of a felt material. The dustproof member 7 has a first slit 7a extending horizontally along the CD insertion portion 6a and both ends of the MD insertion portion 6b. A second slit 7b extending in the vertical direction is formed, and the first slit 7a and the second slit 7b intersect each other.
[0018]
The first medium used in this embodiment is a CD (compact disc) having a diameter of 8 cm and a diameter of 12 cm. Hereinafter, a CD having a diameter of 8 cm will be referred to as a small diameter disc SD, and a CD having a diameter of 12 cm will be referred to as a large diameter. This is called a disk LD. The small-diameter disc SD and the large-diameter disc LD are inserted and ejected from the CD insertion portion 6a. At this time, the first slit 7a functions as a CD entrance / exit. The second medium used in this embodiment is an MD (mini disk), and as shown in FIG. 12, this MD is one in which a magneto-optical disk Mb is housed in a synthetic resin cartridge case Ma. The cartridge case Ma is provided with a shutter Mc for opening and closing the magneto-optical disk Mb. The MD is inserted and ejected from the MD insertion portion 6b. At that time, the dust-proof member 7 partitioned in an H shape by the central portion of the first slit 7a and the second slit 7b secures the entrance / exit of the MD. Note that the center position C2 of the MD insertion portion 6b is offset to the right side in the figure with respect to the center position C1 of the CD insertion portion 6a, whereby the recording / recording of the small-diameter disk SD and the large-diameter disk LD and MD magneto-optical disk Mb. Each rotation center during reproduction is set to coincide with the center position C1.
[0019]
As shown in FIG. 2, the four corners of the main chassis 2 are elastically supported by the frame body 1 via damper members 8 so that vibration from the frame body 1 is not directly transmitted to the main chassis 2. It has become. The main chassis 2 is selectively locked by a lock mechanism (not shown), and the main chassis 2 is fixedly supported with respect to the frame 1 in this locked state. A thread motor 9 is mounted on the main chassis 2, and the screw shaft 10 is rotated by using the thread motor 9 as a drive source. The rotation of the screw shaft 10 causes the optical pickup 11 to be parallel to the main shaft 12 and the sub shaft 13. It is designed to reciprocate along. A spindle motor 14 is mounted on the main chassis 2, and as shown in FIG. 3, the rotation shaft of the spindle motor 14 and the lower end of the drive shaft 15 are connected by a belt 16 on the lower surface of the main chassis 2, The drive shaft 15 rotates using the spindle motor 14 as a drive source. The drive shaft 15 is supported by a bearing 17 having a magnet coupling portion 17a at the upper end. As will be described later, the drive shaft 15 is selected as a CD turntable 18 or an MD turntable 19 by a table switching mechanism. Are to be combined.
[0020]
That is, the CD turntable 18 is rotatably supported at the tip of the CD switching arm 20, and the CD switching arm 20 has a CD switching lever 21 driven in the vertical direction and the front-rear direction by a cam mechanism (not shown). It is connected. Similarly, the MD turntable 19 is rotatably supported at the tip of the MD switching arm 22. The MD switching arm 22 is driven by an MD switching lever 23 that is driven in the vertical direction and the front-back direction by a cam mechanism (not shown). Are connected. Now, when the CD switching lever 21 is raised from the state shown in FIG. 2, the CD switching arm 20 and the CD turntable 18 are also raised integrally. In this state, when the CD switching lever 21 moves in the direction of arrow a, the CD switching arm 20 rotates counterclockwise, and the CD turntable 18 stops immediately above the drive shaft 15. Thereafter, the CD turntable 18 is attracted to the coupling portion 17 a by the lowering of the CD switching lever 21, thereby driving the drive shaft. 15 is coupled to a CD turntable 18 (see FIG. 3). When the MD switching lever 23 is raised, the MD switching arm 22 and the MD turntable 19 are also raised integrally. When the MD switching lever 23 moves in the arrow b direction in this state, the MD switching arm 22 rotates clockwise. Then, the MD turntable 19 stops just above the drive shaft 15, and then the MD turntable 19 is attracted to the coupling portion 17 a by the lowering of the MD switching lever 23, and the MD turntable 19 is attached to the drive shaft 15. Are combined.
[0021]
As shown in FIGS. 6 to 15, the sub-chassis 3 disposed above the main chassis 2 is made of a metal plate bent into a convex shape, and the sub-chassis 3 is driven by a cam plate (not shown). 2 can be moved up and down. The arm clamp 4 is attached to the sub chassis 3 so as to be rotatable in the vertical direction with the left side in the figure as a fulcrum, and a clamper 24 is rotatably supported at the tip thereof. The center of rotation of the clamper 24 is located directly above the drive shaft 15, and the arm clamp 4 rotates downward when playing a CD (small-diameter disc SD or large-diameter disc LD), and the clamper 24 and the CD turntable 18 To chuck the CD. A drive lever 25 is attached to the subchassis 3, and the drive lever 25 is rotatable about a support shaft 26 using a motor (not shown) as a drive source. A holder 27 is connected to the tip of the drive lever 25, and this holder 27 moves forward and backward in the convex portion of the subchassis 3 by the rotation of the drive lever 25. The depth dimension of the holder 27 is set to a length that is half or less of the dimension of the MD cartridge case Ma in the front-rear direction, and the MD moves to the play position together with the holder 27 while being held by the holder 27. The holder 27 is provided with a pair of stoppers 27a that come into contact with the front end surface of the MD in the insertion direction, and claw portions 27b that are hooked to the MD cartridge case Ma are provided on the left and right sides of the holder 27 (FIG. 12). reference).
[0022]
An MD detection lever 28 and a pair of CD detection levers 29 and 30 are rotatably supported by the holder 27, and both the CD detection levers 29 and 30 are engaged with each other by gear portions 29b and 30b in the vicinity of the shaft center. The free ends are biased toward each other by the spring 30c. A detection switch 31 is installed in the vicinity of the MD detection lever 28 and one CD detection lever 29, and the other CD detection lever. A lock pin 30a is planted at -30. The lock pin 30a is opposed to a contact portion 32b formed in a part of the lock slider 32, and the CD detection lever 30 is in a state where the lock pin 30a contacts the contact portion 32b of the lock slider 32. No further rotation is possible. The lock slider 32 is urged to the right in FIG. 6 by a spring 33, and a tapered portion 32 a formed at the tip of the lock slider 32 protrudes to the right side of the holder 27. The lock slider 32 is operated by a release lever 34 pivotally supported at the rear portion of the sub chassis 3, and the release lever 34 and a rotation lever 35 pivotally supported at the front portion of the sub chassis 3 are coupled by a link lever 36. Yes. The link lever 36 is urged rearward by a spring 37, and the boss 35 a of the rotation lever 35 is engaged with the long hole 36 a of the link lever 36. Another rotating lever 38 is pivotally supported on the left side of the front portion of the subchassis 3, and both rotating levers 35, 38 are urged toward each other by springs 35 c, 38 c, It is in contact.
[0023]
Positioning pins 39 and 40 are suspended from the ends of the CD detection levers 29 and 30, respectively, and grooved flange portions 39a and 40a are provided below the positioning pins 39 and 40, respectively. Although not shown, positioning pins 35b and 38a having similar grooved flange portions are also provided at the ends of the rotating levers 35 and 38, respectively. As shown in FIGS. 8 and 11, the peripheral edge on the front end side of the CD in the insertion direction is positioned by contacting the grooved flange portions 39a and 40a of both positioning pins 39 and 40, and the peripheral edge on the rear end side in the insertion direction of the CD. Is positioned by contacting the positioning pins 35b, 38a of both the rotating levers 35, 38.
[0024]
Three light receiving / emitting elements 41 made of optical sensors such as photocouplers are mounted on the front of the subchassis 3, and each light receiving / emitting element 41 is arranged on the same line parallel to the front plate 5 at a predetermined interval. ing. These light emitting / receiving elements 41 are used as determination means, and the type of CD and MD is determined based on a signal output from each light emitting / receiving element 41, and the subchassis 3 is moved up and down based on the determination result. Done. That is, when the CD is inserted, the sub chassis 3 moves to the upper CD position and retracts from the CD transport path, and when the MD is inserted, the sub chassis 3 moves to the lower MD position and moves to the holder 27. Is located on the MD transport path. A shutter member 42 is disposed behind each light emitting / receiving element 41. As shown in FIGS. 4 and 5, the shutter member 42 has a gear 43 that meshes with a rack (not shown), and is moved vertically by the movement of the rack. It can be rotated between a state and a horizontal state. 4 shows an open state of the shutter member 42. In this case, the shutter member 42 is in a horizontal state shown by a solid line in FIG. 5, and the CD or MD is inserted from the insertion opening 6 without being obstructed by the shutter member 42. Can be inserted into. On the other hand, when the shutter member 42 is in a vertical state (closed state) indicated by a broken line in FIG. 5, the shutter member 42 faces the insertion port 6 and prevents insertion of CD and MD.
[0025]
A conveying roller 44 made of a rubber material is disposed behind the front plate 5, and this roller 44 rotates using a motor (not shown) as a driving source. A driven roller (or a guide plate) (not shown) is disposed above the roller 44 so that the CD is held between the roller 44 and the driven roller, and is conveyed to the play position by the rotating roller 44. However, as shown in FIG. 8, in the case of a small-diameter disc SD, it is separated from the roller 44 at the play position, and at this position, the small-diameter disc SD is moved to the positioning pins 39 and 40 of both CD detection levers 29 and 30 and both rotary levers 35. , 38 are held by positioning pins 35b, 38a.
[0026]
The operation of the recording medium driving apparatus configured as described above will be described with reference to the flowchart shown in FIG.
[0027]
In a standby state in which neither CD nor MD media is inserted, the shutter member 42 is in a closed state indicated by a broken line in FIG. 5, and the entire mechanism including the main chassis 2 and the subchassis 3 is attached to the frame 1. On the other hand, it is in a locked state in which it is fixedly supported. When a CD or MD is inserted into the insertion port 6 from this standby state, the CD and MD come into contact with the shutter member 42 in the closed state to be in a temporarily stopped state, and are inserted by each light emitting / receiving element 41 in this temporarily stopped state. It is determined whether the recorded media is CD or MD. That is, since the three light receiving / emitting elements 41 are arranged in a row in the horizontal direction in front of the shutter member 42, one or two of the three light receiving / emitting elements 41 are turned on (or off) when a CD is inserted. When the MD is inserted, all of the three light emitting / receiving elements 41 are turned on (or off), and the type of CD and MD is determined by the difference in the number of these on or off signals. This determination is based on whether or not the detection signals of all the light emitting / receiving elements 41 are switched within a predetermined time after at least one light emitting / receiving element 41 is turned on (or off), and whether the inserted medium is a CD or an MD. It is to be determined.
[0028]
Here, if it is determined that the inserted medium is a CD (small diameter disk SD or large diameter disk LD), the CD switching arm 20 rotates based on the determination result, and the CD turntable 18 is driven to the drive shaft 15. 7, the subchassis 3 is raised to the CD position shown in FIG. 7, and the holder 27 is also raised together with the subchassis 3 to the CD position. As a result, a CD transport path facing the CD insertion portion 6a of the insertion slot 6 is secured below the sub-chassis 3 and the holder 27, and the positioning pins 39 and 40 of both the CD detection levers 29 and 30 and the both rotation levers 35 are secured. 38, the positioning pins 35b, 38a are positioned in the CD transport path. When it is detected by the detecting means (not shown) that the subchassis raising operation has been completed, the shutter member 42 is opened as shown by the solid line in FIG. 5, and the roller 44 rises to bring the CD into the driven roller (not shown). The CD is sandwiched between them, and the CD is started to be conveyed inside by the rotational driving force of the roller 44.
[0029]
Thus, when the CD is conveyed by a predetermined amount, the peripheral edge on the leading end side in the CD insertion direction comes into contact with the grooved flange portions 39a and 40a of both positioning pins 39 and 40, and both CD detection levers 29 and 30 rotate. When the contact portion 29c provided on one CD detection lever 29 is separated from the detection switch 31, the detection switch 31 is turned on. Based on this ON signal, a motor (not shown) rotates, and the drive lever 25 rotates using this as a drive source. Therefore, the holder 27 moves backward in the convex portion of the subchassis 3, and both positioning pins 39, 40 together with the holder 27. Moving. Accordingly, the CD is transported by the rotational driving force of the roller 44 with the peripheral edge on the leading end side in the insertion direction positioned and held by the positioning pins 39, 40, and the center hole of the CD is transported to just above the CD turntable 18. At this point, the holder 27 stops. At this time, if the moving speed of the holder 27 is set to be slightly slower than the CD conveying speed due to the rotation of the roller 44, the peripheral edge of the CD is surely secured to the grooved flange portions 39a, 40a of the positioning pins 39, 40. Due to the pressure contact, vibrations are applied from the outside during the conveyance of the CD, and the CD does not collide with the mechanical parts such as the sub chassis 3 and the holder 27 to be damaged.
[0030]
When the holder 27 stops at the retracted position, as shown in FIG. 9, the subchassis 3 is lowered from the CD position, and the arm clamp 4 is rotated downward accordingly, and the clamper 24 and the CD turntable 18 perform the CD. The entire mechanism including the main chassis 2 and the sub-chassis 3 is in an unlocked state elastically supported by the frame 1. Then, the CD turntable 18 is rotated by the spindle motor 14 and the optical pickup 11 on the main chassis 2 is transferred in the radial direction of the CD, whereby the CD play operation is started. In this play state, since the CD small-diameter disc SD and the large-diameter disc LD have different distances from the center of rotation to the peripheral edge, the positions of the positioning pins 39 and 40 according to the diameter difference between these two types of discs. Need to change. Hereinafter, this point will be described in detail.
[0031]
As shown in FIG. 6, when the small-diameter disk SD is inserted, the peripheral edge on the leading end side in the insertion direction comes into contact with the grooved flange portions 39a and 40a of both positioning pins 39 and 40. When the lock pin 30a comes into contact with the contact portion 32b of the lock slider 32, the CD detection levers 29 and 30 are in a locked state where they cannot rotate any further. Both CD detection levers 29 and 30 are retracted together with the holder 27 while maintaining the opening angle, and the positioning pins 35b and 38a abut against the peripheral edge of the small-diameter disk SD. start. In the case of the small-diameter disc SD, the diameter is as small as 8 cm. Therefore, as the small-diameter disc SD approaches the play position, the rotating levers 35 and 38 are moved toward the rear end side in the insertion direction of the small-diameter disc SD by the biasing force of the springs 35c and 38c. The link lever 36 moves forward against the spring force of the spring 37 and the release lever 34 is rotated so as to be inclined. For this reason, the taper portion 32a formed at the tip of the lock slider 32 moves backward without coming into contact with the release lever 34, and the small-diameter disk SD is maintained while the locked state of both the CD detection levers 29 and 30 by the lock slider 32 is maintained. Is transported to the play position as shown in FIG. Note that the rear end side in the insertion direction of the small-diameter disk SD is separated from the roller 44 during the conveyance. At this time, the four peripheral edges of the small-diameter disk SD are held by the positioning pins 35b, 38a, 39, and 40. Is transported to the play position as the holder 27 moves backward.
[0032]
On the other hand, when the large-diameter disk LD is inserted as shown in FIG. 10, both the rotating levers 35 and 38 come into contact with the peripheral edge of the large-diameter disk LD and start to rotate as in the case of the small-diameter disk SD. The link lever 36 and the release lever 34 operate in conjunction with the rotation of the rotating lever 35. However, since the diameter of the large-diameter disk LD is as large as 12 cm, the link lever 36 does not move forward. Then, as the large-diameter disc LD approaches the play position, both the rotation levers 35 and 38 become closer to the initial state, the link lever 36 is held at the initial position while being urged by the spring 37, and the release lever 34 is also horizontal. Maintain state. As a result, the taper portion 32a of the lock slider 32 comes into contact with the left end of the release lever 34 immediately before the play position, and the lock slider 32 moves to the left in FIG. 11 so that the contact portion 32b is detached from the lock pin 30a. The locked state of both the CD detection levers 29 and 30 by the lock slider 32 is released. Accordingly, both the CD detection levers 29 and 30 are pushed and expanded as the large-diameter disc LD approaches the play position, and as shown in FIG. 11, the CD detection levers 29 and 30 rotate to the maximum open angle close to the horizontal state and stop at the play position.
[0033]
Next, a description will be given of a case where an MD is inserted. In this case, when the detection outputs of all the light emitting / receiving elements 41 are switched to determine the MD as described above, the MD switching is performed based on the determination result. The lever 23 is driven to rotate the MD switching arm 22, the MD turntable 19 is coupled to the drive shaft 15, the sub chassis 3 is moved to the MD position shown in FIG. 13, and the holder 27 is also moved together with the sub chassis 3. Move to MD position. When the subchassis 3 is in the MD position in advance, both the subchassis 3 and the holder 27 are maintained in the MD position. Thereby, a part of the sub-chassis 3 and the holder 27 enters the CD transport path, and the front opening end of the holder 27 faces the MD insertion portion 6 b of the insertion slot 6. When it is detected by the detection means (not shown) that the subchassis 3 and the holder 27 are in the MD position, the shutter member 42 is opened, and when the user pushes the MD back, the MD is inserted as shown in FIG. The direction end surface comes into contact with the stopper 27a in the holder 27 and stops, and the claw portion 27b is hooked on the MD cartridge case Ma. At the same time, one end of the MD detection lever 28 is pushed and rotated by the front end surface of the MD insertion direction, and the detection switch 31 is turned on by the rotation of the MD detection lever 28. Thereafter, as in the case of the CD, the holder 27 is retracted in the convex portion of the subchassis 3 by the rotation of the drive lever 25, and the MD is conveyed while being held by the holder 27. Then, the shutter Mc is opened during the conveyance of the MD, the magneto-optical disk Mb is exposed from the window hole of the cartridge case Ma, and the centering hub of the magneto-optical disk Mb is conveyed to the position just above the MD turntable 19. Then, the holder 27 stops. After the holder 27 is stopped at the retracted position in this way, as shown in FIG. 15, the subchassis 3 is lowered from the MD position, and the centering hub of the MD magneto-optical disk Mb is accordingly attached to the MD turntable 19. The chucking is completed by attracting the magnet, and the entire mechanism is unlocked by being elastically supported by the frame 1. Then, the MD turntable 19 is rotated by the spindle motor 14 and the optical pickup 11 is transferred in the radial direction of the magneto-optical disk Mb, whereby the MD play operation is started.
[0034]
In the above embodiment, the type of CD and MD inserted from the insertion slot 6 is determined from the output signal of each light emitting / receiving element 41, and the holder 27 is selectively raised and lowered to the CD position or the MD position. Because of this configuration, a part of the MD transport path can be used as the CD transport path, so that there is a margin of space in the height direction of the recording medium driving device, and the entire mechanism can be made thinner accordingly. . Further, a shutter member 42 for temporarily preventing the insertion of the CD and MD is disposed behind each light emitting / receiving element 41, and after determining the type of the inserted medium from the output signal of each light emitting / receiving element 41, the shutter Since the member 42 is opened to allow the insertion of the CD or MD, the CD accidentally collides with the holder 27 that is waiting, or the MD becomes an undesired mechanism component such as the positioning pins 39 and 40 on the CD side. It is possible to reliably prevent accidental collision.
[0035]
In the above embodiment, the output signal of each light emitting / receiving element 41 is used as the determining means for determining the type of CD and MD, but other configurations may be employed. Hereinafter, modified examples of the determination unit will be described.
[0036]
17 to 24, a pair of first arms 46 and 47 are supported on the subchassis 45, and the first arms 46 and 47 are rotatable about shafts 46a and 47a. Sliders 48 and 49 are connected to the first arms 46 and 47, and the sliders 48 and 49 have racks 48 a and 49 a that mesh with the gear 50. The second arms 51 and 52 are pivotally supported by the first arms 46 and 47. The second arms 51 and 52 have pins 51a and 52a and bosses 51b and 52b, respectively. The first arms 46 and 47 are stopper portions. 46b, 47b. The pins 51 a and 52 a are located in the transport path of the CD (small diameter disk SD or large diameter disk LD), and the bosses 51 b and 52 b are engaged with guide holes 53 and 54 provided in the subchassis 45. The guide holes 53 and 54 are formed in a substantially arc shape, but have latching portions 53a and 54a at one end.
[0037]
A moving bracket 55 and a lock lever 56 are disposed behind the left first arm 46. The moving bracket 55 is supported by the subchassis 45 so as to be able to move forward and backward, and is urged forward by a spring (not shown). The lock lever 56 is operated by a cam mechanism or the like (not shown) to hold the moving bracket 55 in the retracted position. A detection lever 57 is supported by the moving bracket 55 so as to be rotatable about a shaft 57a. The detection lever 57 has a guide pin 57b at one end, and the guide pin 57b is located in the MD conveyance path. The detection lever 57 has a boss 57 c at the other end, and this boss 57 c is engaged with a cam hole 58 provided in the sub chassis 45. The cam hole 58 has an arc-shaped portion 58a and a relief portion 58b. The central axis of the arc-shaped portion 58a coincides with the shaft 57a of the detection lever 57, and the relief portion 58b is inclined from one end of the arc-shaped portion 58a. It extends backward. A first detection switch 59 is mounted on the moving bracket 55, and the first detection switch 59 is operated by the rotation of the detection lever 57. Further, a second detection switch 60 is attached to the subchassis 45, and the second detection switch 60 is operated by moving the moving bracket 55 forward and backward. Both detection switches 59 and 60 are used to discriminate the type of the inserted medium. When the first detection switch 59 is turned on, it is determined as a CD, and the second detection switch 60 is turned on. Sometimes MD is determined.
[0038]
In the determination means configured as described above, FIGS. 17 to 19 show the MD loading operation. In this case, when the MD is inserted from the MD insertion portion of the insertion slot (not shown), the MD is shown in FIG. The front end surface in the insertion direction abuts against the guide pin 57 b of the detection lever 57. When the MD is further pushed in, the MD push amount is transmitted to the moving bracket 55 via the detection lever 57, and the moving bracket 55 moves backward to turn on the second detection switch 60. It is determined that the media is MD. At this time, since the boss 57c of the detection lever 57 moves in the escape portion 58b of the cam hole 58, when the MD is further pushed in after the second detection switch 60 is turned on, the detection lever 57 rotates clockwise as shown in FIG. The guide pin 57b is retracted to the side of the MD. Further, while the lock lever 56 is driven in a direction in contact with the moving bracket 55 and the MD is transported to the play position and stopped based on the MD determination result, the moving bracket 55 is held in the retracted position as shown in FIG. Is done.
[0039]
20 and 21 show the loading operation of the large-diameter disk LD. In this case, when the large-diameter disk LD is inserted from the CD insertion portion of the insertion slot (not shown), as shown in FIG. The distal end side in the insertion direction hits both the pins 51a and 52a and the guide pin 57b, and both the second arms 51 and 52 begin to rotate. When the large-diameter disk LD is inserted further into the back, the detection lever 57 is centered on the shaft 57a because of the relationship between the normal to the contact point of the large-diameter disk LD with the guide pin 57b and the line connecting the shaft 57a and the guide pin 57b. When the first detection switch 59 is turned on, the CD is determined to be CD. Based on the determination result, the large-diameter disc LD is transported to the play position shown in FIG. 21. When both the second arms 51 and 52 come into contact with the stopper portions 46b and 47b during the transport, both the first arms 46 are brought into contact. , 47 rotate about the shafts 46a, 47a, so that both sliders 48, 49 engaged with each other through the gear 50 move in the opposite direction, and both pins 51a, 52a are evenly accompanied with the conveyance of the large-diameter disk LD. be opened. Therefore, the large-diameter disk LD moves to the back while being centered in the left-right direction.
[0040]
22 to 24 show the loading operation of the small-diameter disk SD. In this case, when the small-diameter disk SD is inserted in a state biased to the left with respect to the center of the CD insertion portion as shown in FIG. The distal end side in the insertion direction hits the left pin 51a, and the second arm 51 on the left side rotates to contact the stopper portion 46b. As a result, the slider 48 connected to the left first arm 46 tries to move to the left, but the boss 52b of the right second arm 52 remains hooked on the hooking portion 54a of the guide hole 54 and moves to the right. Since the rotation of the first arm 47 is locked, the left second arm 51 cannot be rotated any further. Therefore, when the small-diameter disc SD is further inserted, the small-diameter disc SD is moved to the right while being in contact with the left pin 51a, and when the small-diameter disc SD is centered at the center of the CD insertion portion, both the left and right pins 51a. , 52a. On the other hand, as shown in FIG. 23, when the small-diameter disc SD is inserted in a state of being biased to the right side with respect to the center of the CD insertion portion, the distal end side in the insertion direction of the small-diameter disc SD hits the right pin 52a, The two arms 52 rotate and come into contact with the stopper portion 47b. As a result, the right slider 49 tries to move to the right, but the boss 51b of the left second arm 51 is hooked on the hook 53a and the rotation of the left first arm 46 is locked. The right second arm 52 cannot be rotated any further. Therefore, when the small-diameter disc SD is further inserted, the small-diameter disc SD is moved to the left while contacting the right pin 52a, and both the left and right pins 51a when the small-diameter disc SD is centered at the center of the CD insertion portion. , 52a.
[0041]
When the center is centered in this way, the distal end side of the small diameter disk SD in the insertion direction is in contact with both the pins 51a, 52a and the guide pin 57b. The same operation as in the case of LD is performed. That is, as indicated by the solid line in FIG. 24, both the second arms 51 and 52 begin to rotate by the insertion of the small-diameter disk SD, and the detection lever 57 rotates clockwise about the shaft 57a. The switch 59 is turned on, and it is determined that the disc is a CD. Based on this determination result, the small-diameter disc SD is conveyed to the play position indicated by the two-dot chain line in FIG. 24, and both pins 51a and 52a are evenly opened during the conveyance.
[0042]
In the modification shown in FIG. 25, the determination means includes a first rotation arm 62 that pivotally supports the transporting roller 61, a second rotation arm 64 that pivotally supports the driven roller 63, and a first rotation. A detection switch 65 attached to the arm 62 is provided, and both the rotating arms 62 and 64 are coupled so as to be rotatable about a support shaft 66 and are urged toward each other by a spring 67. The conveyance roller 61 and the driven roller 63 are arranged behind an insertion port (not shown), and the CD or MD inserted from the insertion port (right side in the drawing) is sandwiched between the conveyance roller 61 and the driven roller 63. It is conveyed to the inside by the rotational driving force of the conveying roller 61. For this reason, it is preferable to form the conveyance roller 61 and the driven roller 63 with a material rich in elasticity. In particular, the conveyance roller 61 that contacts the recording surface of the CD needs to be formed with a rubber roller. The detection switch 65 is used to determine the type of the inserted medium, and is determined to be CD when the detection switch 65 is on, and is determined to be MD when the detection switch 66 is off.
[0043]
In the determination means configured as described above, when the MD is inserted from the MD insertion portion of the insertion port (not shown), as shown in FIG. 25 (a), the leading end surface in the MD insertion direction is the conveying roller 61 and the driven roller 63. And the second rotating arm 64 rotates upward about the support shaft 66. In this case, since the thickness dimension of MD (usually 4.8 to 5.2 mm) is sufficiently larger than the thickness dimension of CD (usually 1.2 to 1.5 mm), the second rotating arm 64 is It rotates with a large opening angle with respect to the first rotating arm 62, whereby the detection switch 65 is turned off and it is determined that the MD is set. On the other hand, when the CD is inserted from the CD insertion portion of the insertion port (not shown), the front end surface of the CD in the insertion direction enters between the transport roller 61 and the driven roller 63 as shown in FIG. The rotating arm 64 rotates upward about the support shaft 66. In this case, since the thickness dimension of the CD (small diameter disk SD or large diameter disk LD) is sufficiently smaller than the thickness dimension of the MD, the second rotating arm 64 is a small opening with respect to the first rotating arm 62. The first rotation arm 62 is rotated only at an angle, and the first rotation arm 62 is pulled toward the second rotation arm 64 by the spring force of the spring 67, so that the detection switch 65 is kept on and the inserted medium is inserted. Is determined to be a CD.
[0044]
【The invention's effect】
The present invention is implemented in the form as described above, and has the following effects.
[0045]
If the types of the first medium and the second medium inserted from the common insertion slot are determined and the holder is selectively raised and lowered based on the determination result, it is determined that the first medium has been inserted. In such a case, if the holder is retracted from the transport path of the first medium, the first medium can be transported to a predetermined position without being disturbed by the holder, and it is determined that the second medium has been inserted. In this case, if the holder is positioned on the transport path of the second medium, the second medium can be transported to a predetermined position along the holder. Accordingly, a part of the second media transport path can be used as the first media transport path, so that a space in the height direction is generated, and the entire mechanism can be made smaller and thinner accordingly. it can.
[Brief description of the drawings]
FIG. 1 is a front view of a recording medium driving apparatus according to an embodiment of the present invention.
FIG. 2 is a plan view of a table switching mechanism mounted on the main chassis.
FIG. 3 is a side view of the table switching mechanism.
FIG. 4 is a plan view of a shutter opening / closing mechanism.
FIG. 5 is a side view of the shutter opening / closing mechanism.
FIG. 6 is a plan view showing a loading state of 8 cm CD.
FIG. 7 is a front view showing a loading state of 8 cm CD.
FIG. 8 is a plan view showing a play state of 8 cm CD.
FIG. 9 is a front view showing a play state of 8 cm CD.
FIG. 10 is a plan view showing a loading state of 12 cm CD.
FIG. 11 is a plan view showing a play state of 12 cm CD.
FIG. 12 is a plan view showing a loading state of MD.
FIG. 13 is a front view showing a loading state of MD.
FIG. 14 is a plan view showing an MD play state.
FIG. 15 is a front view showing an MD play state.
FIG. 16 is a flowchart illustrating a CD and MD play operation.
FIG. 17 is a main part configuration diagram showing a modification of the determination means;
FIG. 18 is a plan view showing an MD loading process.
FIG. 19 is a plan view showing an MD play state.
FIG. 20 is a plan view showing a 12 cm CD loading in progress.
FIG. 21 is a plan view showing a playing state of 12 cm CD.
FIG. 22 is a plan view showing the centering operation of 8 cm CD.
FIG. 23 is a plan view showing the centering operation of 8 cm CD.
FIG. 24 is a plan view showing a loading operation of 8 cm CD.
FIG. 25 is an explanatory diagram showing another modification of the determination unit.
[Explanation of symbols]
1 frame
2 Main chassis
3 Subchassis
4 Arm clamp
5 Front plate
6 insertion slot
6a CD insertion part
6b MD insertion part
7 Dust-proof material
7a First slit
7b Second slit
11 Optical pickup
14 Spindle motor
15 Drive shaft
18 CD turntable
19 Turntable for MD
24 Clamper
25 Drive lever
27 Holder
29, 30 CD detection lever
31 Detection switch
35, 38 Rotating lever
35b, 38a Positioning pin
39, 40 Positioning pin
39a, 40a Flange with groove
41 Light emitting / receiving elements
42 Shutter member
43 Laura
45 Subchassis
46, 47 1st arm
46b, 47b Stopper part
48, 49 slider
51, 52 Second arm
51a, 52a pin
53, 54 Guide hole
53a, 54a Hook
55 Moving bracket
56 Lock lever
57 Detection lever
57b Guide pin
58 Cam hole
59 First detection switch
60 second detection switch
61 Transport roller
62 First pivot arm
63 Followed roller
64 Second pivot arm
65 Detection switch
66 Spindle
67 Spring
CD 1st media
MD Second media

Claims (7)

In a recording medium driving apparatus in which a first optical disk and a second medium containing a disk in a cartridge case are recorded and / or reproduced by a common optical pickup, the first medium and the second medium a common insertion opening into which the media is inserted or ejected, a holder for accommodating the insertion slot inner said second medium is vertically movable disposed of, the type of the media that is inserted in the front side of the holder A determination means for determining, a shutter for preventing insertion of the first and second media behind the determination means, and determining that the determination means is the first medium, retracting the holder to the transport path of the first medium, together with the conveying path of the first medium to open the shutter after it has been secured, before When the determination means determines that said second medium, recording medium driving apparatus is characterized in that so as to open the shutter after positioning the holder on the transport path of the second medium . 2. The center position of the first media insertion portion according to claim 1 , wherein the insertion port includes a horizontally long first media insertion portion and a second media insertion portion protruding from an upper side thereof. In contrast, the second medium insertion portion is offset to the right side. 3. The dust-proof member according to claim 2 , wherein a dust-proof member that closes the insertion opening is provided, and the dust-proof member includes a first slit that extends in a horizontal direction along the first media insertion portion, and the second media-use member. And a second slit extending in the vertical direction along both ends of the insertion portion. The determination unit according to claim 1 , wherein the determination unit includes three detection elements arranged on the same line at a predetermined interval, and determines the type of the medium inserted according to a signal output from the detection elements. A recording medium driving apparatus characterized by the above. The determination unit according to claim 1 , wherein the determination means includes a movable bracket that can move forward and backward, a detection lever that is rotatably supported by the movable bracket, and a first detection switch that is operated by rotation of the detection lever; A second detection switch that is operated by moving the moving bracket forward and backward, the first detection lever is rotated by insertion of the first medium, and the detection lever is interposed by insertion of the second medium. And the moving bracket is retracted. 2. The method according to claim 1 , wherein the determination unit includes a pair of rotating arms biased in directions close to each other, and a detection switch operated according to an opening angle of the rotating arms. A recording medium driving apparatus, wherein an opening angle of both the rotating arms is changed according to a difference in thickness of the second medium. 7. The recording medium driving device according to claim 6 , wherein a rubber roller that contacts the lower surface of the first medium is supported on at least one of the two rotating arms.

Images