JP3949855B2 - Recording medium playback device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recording medium reproducing apparatus, and more particularly to a recording medium reproducing apparatus in which a positioning mechanism that positions at a clamp position of a turntable when a disc such as a CD is inserted is improved.
[0002]
[Prior art]
In recent years, a playback device using a disk such as a CD or a DVD as a recording medium has been widely used. In such a disk playback device, for example, in order to enjoy music in a car, as shown in FIG. An in-vehicle device (CD player) 1 has been developed.
[0003]
Such an apparatus is configured to position an 8 cm diameter disk and a 12 cm disk inserted into the reproducing apparatus while centering them on the reproducing mechanism.
[0004]
As an example of the centering mechanism, a pair of left and right centering arms provided on the clamper arm and provided with a positioning portion for positioning the inserted disc on the reproducing mechanism, and the positioning portion of the centering arm at a predetermined position. And a centering lock arm for positioning.
This positioning unit stands by at a position where the 8 cm disc can be positioned on the reproduction mechanism, and when the 12 cm disc is inserted, it is pushed by the outer peripheral edge of the 12 cm disc and moves backward. . That is, when an 8 cm disc is inserted, the centering arm is locked by the centering lock arm so that the 8 cm disc is positioned on the playback mechanism. When a 12 cm disc is inserted, the 12 cm disc is played back by the playback mechanism. The centering arm is unlocked so as to be positioned upward.
[0005]
[Problems to be solved by the invention]
However, in the case of the above conventional example, in order to position an 8 cm disk and a 12 cm disk, the above-described members are required, which causes an increase in the number of parts.
In addition, since the positioning portion is configured to move significantly, there is a problem in that the positioning accuracy when positioning each disk is also affected.
[0006]
The present invention has been proposed in order to deal with such various situations, and the number of parts can be reduced, and the disk conveyed inside the apparatus can be accurately positioned at the reproduction position. It is another object of the present invention to provide a recording medium playback apparatus that can be made more compact.
[0007]
[Means for Solving the Problems]
  In order to achieve this object, the present invention has the following features. One is a recording medium reproducing apparatus including an insertion slot into which a recording medium having a small diameter and a large diameter can be inserted, and a reproducing mechanism for reproducing the recording medium, and positions the small diameter recording medium at a predetermined position. Positioning means comprising a first positioning portion and a second positioning portion for positioning a large-diameter recording medium at a predetermined position in the same member, and one end abutting the positioning means,An abutting member that abuts only on the large-diameter recording medium having the other end inserted therein, and the abutting member is brought into contact with the large-diameter recording medium when the large-diameter recording medium is inserted. The first positioning portion retracts from the conveyance path of the large-diameter recording medium by operating and the positioning means interlocking with the contact member.At the same time, the second positioning portion is erected on the conveyance path.It is characterized by that.
[0008]
  One aspect is the recording medium reproducing apparatus described above, wherein the positioning means is movable so that the first positioning portion is retracted in a direction substantially perpendicular to the recording surface of the recording medium being conveyed. Features.
[0009]
In another aspect, the recording medium reproducing apparatus is characterized in that the abutting member abuts only the periphery of the large-diameter recording medium at the other end.
[0010]
Further, in the recording medium reproducing apparatus described above, the positioning means is movable in a tiltable manner with an axis substantially parallel to the recording surface of the recording medium as a rotation axis at the back of the apparatus. And
[0011]
According to the present invention having such characteristics, first, as positioning means, a first positioning portion and a second positioning portion are formed in the same member. Then, when positioning a small diameter recording medium carried on the reproduction mechanism, for example, an 8 cm diameter recording medium, the positioning is performed by the first positioning unit, and a large diameter recording medium, for example, a 12 cm diameter recording medium is positioned. In that case, positioning is performed by the second positioning portion. In addition, an abutting member that abuts only on a large-diameter recording medium in which one end abuts on the positioning unit and the other end is inserted is provided. Then, when the large-diameter recording medium is carried in, the abutting member is operated in contact with the large-diameter recording medium, and the positioning means is interlocked with the abutting member, so that the first positioning portion is recorded in the large-diameter recording medium Retreat from the medium conveyance path. According to this, since the first positioning portion can be retracted using the force with which the large-diameter recording medium is conveyed via the contact member, the mechanism of the positioning means can be simplified. Thus, the apparatus can be made compact and the number of parts can be reduced.
[0012]
In addition, since the positioning means is moved so that the first positioning portion is retracted in a direction substantially perpendicular to the recording surface of the recording medium being conveyed, interference with the recording medium being conveyed is ensured. Can be prevented.
[0013]
Further, since the positioning means is configured to be movable in a tiltable manner with an axis substantially parallel to the recording surface of the recording medium as a rotation axis at the back of the apparatus, the amount of movement of the positioning means, particularly in the vertical direction of the apparatus Since the amount of movement may be small, the apparatus can be reduced in size, particularly reduced in thickness.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of a recording medium reproducing device according to the invention will be described with reference to the accompanying drawings. The recording medium reproducing apparatus of the present invention is an apparatus for reproducing a disc such as a CD or a DVD. In the embodiments described below, a CD will be described as an example.
[0019]
FIG. 1 is an overall perspective view of a recording medium reproducing apparatus according to the present invention, FIG. 2 is a schematic perspective view showing a chassis portion which is a main part of the recording medium reproducing apparatus, and FIG. 3 is a plan view showing an internal structure thereof. 4 is a front view.
[0020]
In the figure, reference numeral 1 denotes a housing installed in an instrument panel of the vehicle, and reference numeral 2 denotes a chassis that is supported in a floating state in the housing 1 via a damper 3.
The casing 1 is formed of a rectangular parallelepiped frame, and an insertion port 11 for inserting 8 cm CD or 12 cm CD is opened at the front. Further, a notch portion 12 into which a lock arm 21 to be described later is fitted is formed below the insertion port 11 continuously with the insertion port 11.
[0021]
The chassis 2 is supported so as to maintain a floating state in the housing 1 via dampers 3 arranged at four positions on the left and right of the front and rear of the housing 1. The damper 3 is made of an elastomer resin, has an elastic force to be deformed and restored, and a damper shaft 31 connected to the chassis 2 is inserted and coupled.
[0022]
As will be described in detail later, a disk transport roller 8 for transporting each CD is disposed in the front portion of the chassis 2, and a disk for adjusting the transport angle of each CD is disposed above the disk transport roller 8. A guide arm 7 is provided. A clamper arm 6 for clamping each CD is disposed at the rear of the chassis 2.
[0023]
As shown in FIGS. 3 and 4, the lock arm 21 is rotatably disposed at the front portion of the chassis 2, and the tip end portion thereof is flush with the upper surface of the notch portion 12. The outside of the notch 12 is formed in a gentle slope from the top to the bottom, and the lower part is a fitting portion of the lock arm. Then, as the lock arm rotates, the tip of the lock arm is guided to the inclined portion while being caught by the notch portion 12, and is fitted to the notch portion 12 while pushing down the chassis 2.
[0024]
Then, as shown in FIG. 4B, when the chassis 2 is pushed down, the damper shaft 31 also moves downward, and the damper 3 is elastically deformed downward accordingly.
As a result, even if the damper 3 is interposed in the passage area from the insertion port 11 to the reproduction mechanism, the damper can be elastically deformed and retracted from the passage area when the recording medium is conveyed.・ There is no effect on passage.
Further, since the chassis 2 is fixed to the housing 1, the disk 2 can be transported without shaking of the chassis 2 due to vibration or the like when the disk is transported.
[0025]
2, 3, and 5, the centering mechanism for positioning the CD inserted from the insertion slot 11 at the center of the insertion slot 11 is arranged 1 inside the disc insertion slot 11 with a predetermined interval. A pair of centering arms 22, 22, a pair of connecting arms 23, 23 joined to the centering arms 22, 22 so as to be rotatable, and the other ends of the connecting arms 23, 23 in the disc insertion direction. A long hole 24 or the like serving as a guide portion for guiding the movement is provided.
[0026]
As shown in FIG. 2, the centering arm 22 is formed with an arcuate cam surface 22a that abuts on switches 27 and 28 as discriminating means for discriminating the diameter of the disk, which will be described later. The centering arm 22 is pivotally supported on the chassis 2 via a support pin 22b.
[0027]
Centering pins 22c and 22c are attached to the front ends of the centering arms 22 and 22 and come into contact with the peripheral edge of the inserted disc. Further, one end of a pair of connecting arms 23, 23 is rotatably connected to the rear ends of the centering arms 22, 22 by a pin 22d. In addition, a guide pin 25 that moves in a long hole 24 as a guide portion is provided at the other end of the connecting arms 23 and 23 in a state where the connecting arms 23 and 23 are connected.
[0028]
As shown in FIG. 2, the long hole 24 is formed with a different diameter hole 24 a having a diameter larger than the shortest width of the long hole 24 in the middle of the long hole 24. Is formed in parallel to the disc insertion direction. As a result, the connecting arm 23 can move in the long hole 24 via the guide pin 25 in parallel with the disc insertion direction.
[0029]
The guide pin 25 is always urged toward the back of the apparatus by a spring 26 having one end fixed to the chassis 2.
The centering mechanism having such a configuration stands by at a position as indicated by a one-dot oblique line in FIG. 2 or FIG.
That is, the centering pins 22c and 22c are biased in the direction in which the distance between the centering pins 22c and 22c is narrowed via the centering arms 22 and 22 and the connecting arms 23 and 23. At this time, the interval between the centering pins 22c and 22c is set to be slightly narrower than the outer diameter of 8 cm CD.
Further, the centering pins 22c and 22c are rotated in the direction of the arrow in FIG. 5 while urging each CD in the center direction by the disc insertion operation, so that the CD is centered.
In addition, when the centering pin is located at the position shown by the one-dot oblique line in FIG. 3 or FIG. 5, it is only when the 12 cm CD is inserted.
Further, if a force is applied to only one of the pair of connecting arms 23, 23, that is, the CD is inserted in a biased direction in either direction, the centering pins 22c, 22c When a force is applied to either one of them, a guide pin 25 described later enters the different diameter hole 24a and cannot move any more.
[0030]
A disc guide arm 7 is provided at the subsequent stage of the centering pin 22c. The disk guide arm 7 is arranged above the disk transport roller 8 and controls the transport angle by transporting the disk transport roller 8 and the disk guide arm 7 while sandwiching 8 cm CD and 12 cm CD.
[0031]
Specifically, as shown in FIG. 7, the disk guide arm 7 is provided with tapered surfaces 7A and 7B. The taper surfaces 7A and 7B are formed slightly downstream of the apparatus with respect to the disk transport roller 8. The CD inserted from the insertion slot 11 is transported by the disk transport roller 8, and 8 cm CD is 7A having a shallow taper surface. Pass through 7B deep on the 12 cm CD taper surface.
Therefore, since the 8 cm CD is sandwiched and transported between the disk transport roller 8 and the tapered surface 7A, the transport angle is slightly higher. On the other hand, since 12 cm CD is sandwiched and transported between the disk transport roller 8 and the tapered surface 7B, the transport angle is slightly parallel.
Therefore, 8 cm CD is inclined slightly upward with respect to 12 cm CD due to the difference in taper, and is conveyed to the reproducing mechanism.
[0032]
When the above-described centering pin 22c rotates, as shown in FIGS. 2 and 6, the centering arm 22 formed integrally with the centering pin 22c rotates about the support pin 22b.
When the 8 cm CD is inserted, the rotation of the centering pin 22c is small, so that the rotation of the centering arm 22 is naturally small, and the cam surface 22a formed on the centering arm 22 abuts only on the switch 27 so that the switch 27 Only turn on. The inserted CD is determined to be 8 cm CD.
When a 12 cm CD is inserted, the centering pin 22c rotates greatly, and the cam surface 22a of the centering arm 22 comes into contact with the switch 27 and the switch 28 to turn on each switch. When both switches 27 and 28 are turned on, the inserted CD is determined to be 12 cm CD.
[0033]
Next, the configuration of positioning means for positioning each CD disk will be described.
FIG. 8 is a perspective view showing the positioning means for positioning the disk as viewed from the lower surface direction, and FIG. 9 is a plan view of the positioning means.
[0034]
As shown in FIGS. 8 and 9, reference numeral 5 denotes a centering guide arm, which is a member for positioning the disc that has been conveyed.
Reference numeral 6 denotes a clamper arm, and the clamper arm 6 is attached to the chassis 2 shown in FIG. 1 via a fixed piece 6a so as to be tiltable. A clamper 61 that clamps the center of the disk on the spindle motor of the reproducing mechanism is disposed at the approximate center of the clamper arm 6.
The centering guide arm 5 is pivotally supported by shafts 51 and 51 at a rear portion of the clamper arm 6 so as to be tiltable.
[0035]
The centering guide arm 5 is formed of a plate-like plastic having a thickness larger than at least the thickness of the CD.
And the 1st positioning part 52 is formed in the inner side. That is, it is formed in an arc shape so as to fit the outer periphery of the 8 cm CD, and as shown in FIG. 10, the outer peripheral edge of the conveyed 8 cm CD is in contact with the first positioning portion 52, so that the 8 cm CD is 8 cm. The CD is positioned at a predetermined position with respect to the reproduction mechanism. That is, the center of the disk is the position that coincides with the center of the turntable, and is positioned at a position that can be clamped.
Further, a second positioning portion 53 is formed on the outside of the centering guide arm 5 as shown in FIG. 9C, which is a cross-sectional view taken along the line AA of FIG. 8 and FIG. 9A. The second positioning portion 53 has a rising portion formed in an arc shape so that the outer periphery of the centering guide arm 5 is aligned with the outer periphery of the 12 cm CD. As shown in FIG. The 12 cm CD is positioned at a predetermined position with respect to the reproducing mechanism by the outer peripheral edge coming into contact with the second positioning portion 53, that is, the rising portion. For example, the position of the center of the disk coincides with the center of the turntable, and the disk is positioned at a position where the disk can be clamped.
The centering guide arm 5 is normally biased so as to incline downward with respect to the clamper arm 6 so that the first positioning portion 52 for CD of 8 cm protrudes on the disk transport path. is there. Therefore, when the CD is conveyed, the outer periphery of the CD comes into contact with the first positioning portion 52 and is positioned as shown in FIG.
[0036]
Next, the tilting of the centering guide arm will be described.
A guide relief arm 54 shown in FIG. 9A is rotatably disposed on one side of the chassis 2 by a support pin 54c. The guide relief arm 54 is formed with a contact portion 54b at the front end of the guide escape arm 54 that contacts the conveyed 12 cm CD, and an arm pin 54a at the rear end. On the other hand, as shown in FIG. 9B, a taper surface 55 a is formed on the extending portion 55 provided on the side of the centering guide arm 5.
Therefore, when a 12 cm CD is conveyed, the outer peripheral edge of the CD abuts on the arm pin 54b of the guide escape arm 54, and the guide escape arm 54 is rotated around the support pin 54c. Then, the rear end arm pin 54a comes into contact with the tapered surface 55a, lifts the centering guide arm 5 upward, and becomes parallel to the clamper arm 6, as shown in FIG. As a result, the first positioning portion 52 protruding on the CD transport path is retracted upward, and a 12 cm CD transport path is secured. The conveyed CD of 12 cm is positioned on the reproduction mechanism in contact with the second positioning portion 53.
Further, when the CD of 8 cm is conveyed, it is centered in the direction of the center of the apparatus by the centering pin 22c and conveyed. At this time, since the outer diameter of 8 cm CD is smaller than that of 12 cm CD, it does not come into contact with the arm pin 54 b.
[0037]
As another example, the contact portion 54b is also used as the centering pin 22c. Although a specific configuration is not shown, the front end side of the escape arm 54 is extended so that the contact portion 54b is positioned at the permanent placement position of the centering pin 22c.
Then, when 8 cm CD is loaded by, for example, separating the arm pin 54a provided at the rear end of the escape arm 54 from the tapered surface 55a of the centering guide arm 5, the arm pin 54a does not contact the tapered surface 55a, The arm pin 54a is configured to come into contact with the tapered surface 55a only when a 12 cm CD is loaded.
That is, the centering pin 22c rotates a small amount when the 8 cm CD is carried in, but does not reach the taper surface 55a until the arm pin 54a comes into contact with the tapered surface 55a. And the centering guide arm 5 is pushed upward.
[0038]
In the above description, the centering guide arm 5 has been described as being pivotally supported by the shafts 51 and 51 at the rear portion of the clamper arm 6, but the present invention is not limited thereto. You may make it move.
For example, the centering guide arm 5 is entirely suspended by an elastic body or the like, and the first positioning portion 52 for a CD of 8 cm always protrudes on the disk transport path, and the centering guide arm 5 is loaded when a 12 cm CD is loaded. The entirety may be pushed up so that the second positioning portion 53 is positioned on the transport path.
[0039]
The first positioning portion 52 and the second positioning portion 53 of the centering guide arm 5 are provided with first and second detection members that detect that the disc has been positioned, respectively.
As shown in FIG. 9, the detection member includes a detection arm 56 formed on one side in a bifurcated shape, and detection pins 52 a and second as first detection members formed on the bifurcated tip of the detection arm 56, respectively. And a detection pin 53a as a detection member.
The detection arm 56 is arranged so that the detection pin 52a slightly protrudes from the first positioning portion 52, and the detection pin 53a slightly protrudes from the second positioning portion 53. The guide arm 5 is rotatably supported by a pin 56b. Then, an 8 cm CD or a 12 cm CD is transported, and the outer peripheral edge of the CD abuts against the detection pin 52a or the detection pin 53a, so that the detection arm 56 is slightly rotated. As will be described in detail later, the centering guide arm 5 is tilted upward, and the detection arm 56 is also separated from the CD to be in a CD clampable state.
[0040]
A detection arm pin 56 a is formed on the other side of the detection arm 56, and the detection arm pin 56 a is fitted in an L-shaped long hole 57 a formed on one side of the connecting member 57.
The connecting member 57 is slidable in the longitudinal direction of the apparatus (vertical direction in the figure) on the side of the clamper arm 6 and, as shown in the figure, when the CD is not loaded, as shown in FIG. As shown, the detection pin 56a is located in the short hole portion of the L-shaped long hole.
Then, when the CD is transported and its outer peripheral edge abuts on the detection pin 52a or the detection pin 53a and the CD is positioned on the positioning member 52 or 53, the detection arm 56 is slightly rotated. Then, the detection arm pin 56a is displaced to the position shown in FIG.
[0041]
Next, as shown in FIG. 13, the rack 44 is rotatably connected to the lower end of the connecting member 57. The rack 44 is disposed so as to be rotatable by a shaft 44b. Further, a motor 4 is disposed in the chassis 2, and a gear 41 is engaged with the motor 4, and further, the gear 41 is engaged with a gear 42. The gear 41 and the gear 42 are used to attenuate the rotational speed of the motor 4.
In each member engaged as described above, when the connecting member 57 is pushed down, the rack 44 rotatably connected to the other end of the connecting member 57 meshes with the gear 42, and the rack 44 is pushed down. Accordingly, the connecting member 57 is further pushed down. As a result, as shown in FIG. 9D, the tapered surface 57b formed on the connecting member 57 and the tapered portion 58 formed on the centering guide arm 5 are joined together, and the centering guide. The arm 5 is pushed up, and the centering guide arm 5 is separated from the CD.
[0042]
As shown in FIGS. 10 and 11, when the CD is positioned, the rack pin 44a integrally formed with the rack 44 is pushed down, and the cam 43 fitted to the rack pin 44a rotates. Further, the lock lever 45 fitted to the cam pin 43 a formed integrally with the cam 43 slides in the lateral direction (left direction in the drawing), and further, the lock arm pin 46 erected on the lock lever 45. Pushes the lock arms 21 and 21 to rotate the lock arms 21 and 21 inward. As a result, the lock arms 21 and 21 are disengaged from the notch 12, and the chassis 2 is supported in a floating state.
Further, with the movement of the connecting member 57, a clamp mechanism and a disc transport roller retracting mechanism (not shown) are configured to transmit power from the motor 4. Therefore, the clamp mechanism clamps each positioned disk, and the disk transport roller retracting mechanism retracts the disk transport roller 8 from the disk surface so as to release the contact between the disk and the roller. Then, the CD can be played back.
As described above, the contact between the positioning portions 52 and 53 and the detection pins 52a and 53a by the movement of the centering guide arm 5 and the CD, and the contact between the disc transport roller 8 and the CD by the retreat movement of the disc transport roller 8 are released. Thus, the reproduction of the CD is appropriately performed.
[0043]
Next, the operation of the recording medium playback apparatus of the present invention configured as described above will be described.
First, the conveyance operation process in the case of 8 cm CD will be described.
When the 8 cm CD is inserted into the apparatus through the insertion port 11, for example, it abuts on either the left or right centering pin 22c shown in FIG. The centering pin 22c rotates by being pushed by the disk, and the guide pin 25 moves in the long hole 24 via the connecting arm 23 in conjunction with this operation. As the centering pin 22c rotates, the cam surface 22a of the centering arm 22 contacts the switch 27, and the switch 27 is turned on. In conjunction with the ON of the switch 27, the disk transport roller 8 starts to rotate and starts transporting the CD.
The transported CD is sandwiched between the disk transport roller 8 and the disk guide arm 7 and transported in the depth direction of the apparatus. At this time, the 8 cm CD is transported slightly upward to the reproduction mechanism by the disc guide arm 7 having a shape as shown in FIG.
[0044]
In addition, the centering guide arm 22 further rotates during the conveyance process, but returns to the original state again after the portion with the maximum diameter of 8 cm CD contacts the centering pin 22c.
In this case, if the 8 cm CD is inserted with a bias with respect to the insertion slot 11, for example, if it is inserted in an oblique direction with respect to the insertion slot 11 so as to contact only the left centering pin 22c, as shown in FIG. When the guide pin 25 is rotated to some extent, the guide pin 25 enters the different diameter hole 24a of the long hole 24 to prevent the guide pin 25 from moving, and the centering pin 22c is locked. As a result, the 8 cm CD moves toward the center of the apparatus, and a centering operation is performed. Further, by this centering operation, the 8 cm CD does not contact the contact portion 54 b of the guide escape arm 54.
[0045]
Next, the 8 cm CD conveyed onto the reproduction mechanism contacts the first positioning portion 52 of the centering guide arm 5 and is centered and positioned on the reproduction mechanism. At this time, since the 8 cm CD is conveyed slightly tilted upward, it is brought into contact with the first positioning portion 52 accurately.
And the outer periphery of 8 cmCD hits the detection pin 52a, and the detection arm 56 is rotated. Then, the connecting member 57 is moved by the rotation of the detection arm 56, and the centering guide arm 5 is separated from the outer peripheral edge of the CD.
Based on the movement of the connecting member 57, the lock arm 21 is unlocked as described above, and the chassis 2 (reproducing mechanism) enters a floating state.
At the same time, based on the movement of the connecting member 57, the disk transport roller 8 is retracted from the 8 cm CD recording surface, and then the clamping mechanism is operated. When the clamping is completed, the reproducing operation is started.
Since the switch 28 is not turned on during the 8 cm CD transport process, the inserted disc can be identified as 8 cm CD if the switch 28 is not turned on when the 8 cm CD transport is completed.
[0046]
Next, the case of 12 cm CD will be described.
When a 12 cm CD is inserted into the apparatus through the insertion port 11, for example, it abuts on either the left or right centering pin 22c shown in FIG. The centering pin 22c rotates by being pushed by the disk, and the guide pin 25 moves in the long hole 24 via the connecting arm 23 in conjunction with this operation. As the centering pin 22c rotates, the cam surface 22a of the centering arm 22 comes into contact with the switch 27 and the switch 28, and the switch 27 and the switch 28 are turned on. In conjunction with the ON of the switch 27, the disk transport roller 8 starts to rotate and starts transporting the CD.
The transported CD is sandwiched between the disk transport roller 8 and the disk guide arm 7 and transported in the depth direction of the apparatus. At this time, the 12 cm CD is transported substantially parallel to the reproducing mechanism by the disc guide arm 7 having a shape as shown in FIG.
[0047]
In addition, the centering guide arm 22 further rotates during the conveyance process, but returns to the original state again after the maximum diameter portion of 12 cm CD comes into contact with the centering pin 22c.
[0048]
On the other hand, the outer peripheral edge of the 12 cm CD abuts against the abutment portion 54b of the guide escape arm 54 during the conveyance, the guide escape arm 54 is rotated around the support pin 54c, the centering arm 5 is lifted upward, and the clamper arm 6 Becomes parallel.
As a result, the first positioning portion 52 protruding on the 12 cm CD conveyance path is retracted upward, and the 12 cm CD conveyance path is secured. In addition, the second positioning unit 53 is erected on the 12 cm CD conveyance path.
[0049]
Next, the 12 cm CD conveyed onto the reproduction mechanism contacts the second positioning portion 53 of the centering guide arm 5 and is centered and positioned on the reproduction mechanism.
Then, the outer peripheral edge of the 12 cm CD comes into contact with the detection pin 53a, and the detection arm 56 is rotated. Then, the connecting member 57 is moved by the rotation of the detection arm 56, and the centering guide arm 5 is separated from the outer periphery of the 12 cm CD as described above.
In addition, with the movement of the connecting member 57, the lock arm 21 is unlocked as described above, and the reproduction mechanism mounted on the chassis 2 enters a floating state.
At the same time, with the movement of the connecting member 57, the disc transport roller 8 retracts from the 12 cm CD recording surface, and then the clamp mechanism operates. When the clamping is completed, the reproducing operation is started.
Since the switch 28 is turned on during the 12 cm CD transport process, the inserted disc can be identified as the 12 cm CD when the switch 28 is turned on when the transport of the 12 cm CD is completed.
[0050]
Next, the process of ejecting each disk will be described.
When each disc is ejected, when an unillustrated eject button is pressed, an operation reverse to the above-described transport operation is performed, and 8 cmCD and 12 cmCD are ejected from the insertion slot 11.
In the case of an 8 cm CD, when the switch 27 is turned off, the drive of the disk transport roller 8 is stopped, and a part of the disk protrudes from the insertion slot 11 by the disk transport roller 8 and the disk guide arm 7. It will be in a clamped state.
Further, in the case of a 12 cm CD, when the switch 28 is turned OFF, the drive of the disc transport roller 8 is stopped, and the disc transport roller 8 and the disc guide arm 7 are used with a part of the disc protruding from the insertion slot 11. It will be in a clamped state.
[0051]
As described above, the recording medium reproducing apparatus of the present invention can reliably position 8 cm CD and 12 cm CD by the centering guide arm 5 in which the first positioning portion 52 and the second positioning portion 53 are formed.
Since the amount of movement of the centering guide arm is slight, the positioning portion of each disk can be formed in the same member, so that the apparatus can be made compact and the number of parts can be reduced.
[0052]
In the above-described embodiments, the recording medium is described as a CD. However, the present invention is not limited to this, and other disk-shaped recording media such as a DVD may be used.
Moreover, although the outer diameter of the CD described above has been described as 8 cm and 12 cm, the present invention is not limited to this, and a disk having an appropriate outer diameter may be used.
[0053]
【The invention's effect】
As described above, according to the present invention, it is possible to accurately position the recording medium conveyed inside the reproducing apparatus on the reproducing mechanism.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a recording medium playback apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic perspective view showing a chassis portion which is a main part of the recording medium reproducing apparatus according to the embodiment of the present invention.
FIG. 3 is a plan view of a recording medium playback apparatus according to an embodiment of the present invention.
FIG. 4 is a front view of a recording medium playback apparatus according to an embodiment of the present invention.
FIG. 5 is an explanatory diagram of a centering mechanism.
FIG. 6 is an operation explanatory diagram of the centering arm.
FIG. 7 is an explanatory diagram of a disk guide arm.
FIG. 8 is a perspective view of a centering guide arm.
FIG. 9 is a plan view of a centering guide arm.
FIG. 10 is an explanatory diagram of a state in which the 8 cm CD is in contact with the positioning unit.
FIG. 11 is an explanatory diagram of a state in which a 12 cm CD is in contact with a positioning portion.
FIG. 12 is an operation explanatory view of a detection arm and a connecting member.
FIG. 13 is an explanatory diagram of power transmission.
FIG. 14 is an explanatory diagram showing a state in which a recording medium playback device is mounted on an automobile.
[Explanation of symbols]
1 housing
11 insertion slot
12 Notch
2 Chassis
21 Lock arm
22 Centering arm
22a Cam surface
22b Support pin
22c Centering pin
22d pin
23 Linking arm
24 long hole
24a Different diameter hole
25 Guide pin
26 Spring
27 switches
28 switches
3 Damper
31 Damper shaft
4 Motor
41 Gear
42 Gear
43 cams
43a Cam pin
44 racks
44a Rack pin
44b axis
45 Lock lever
46 Lock arm pin
5 Centering guide arm
51 axis
52 1st positioning part
52a detection pin
53 Second positioning part
53a Detection pin
54 Relief Arm
54a Arm pin
54b Contact part
54c Support pin
55 Extension
55a Tapered surface
56 detection arm
56a Detection arm pin
56b pin
57 Connecting member
57a long hole
57b Tapered surface
58 Taper
6 Clamper arm
6a fixed piece
61 Clamper
7 Disc guide arm
7A Tapered surface
7B Tapered surface
8 Disc transport roller

Claims (4)

A recording medium playback device comprising an insertion slot into which a recording medium with a small diameter and a large diameter can be inserted, and a playback mechanism for playing back the recording medium,
Positioning means comprising a first positioning part for positioning a small-diameter recording medium at a predetermined position and a second positioning part for positioning a large-diameter recording medium at a predetermined position in the same member;
An abutting member that abuts only on the large-diameter recording medium in which one end abuts on the positioning means and the other end is inserted;
When the large-diameter recording medium is inserted, the abutting member is operated in contact with the large-diameter recording medium, and the positioning unit is interlocked with the abutting member, whereby the first positioning unit is A recording medium reproducing apparatus, wherein the recording medium reproducing apparatus is retracted from a conveyance path of the large-diameter recording medium and the second positioning unit is erected on the conveyance path .   2. The recording medium reproducing apparatus according to claim 1, wherein the positioning unit is movable so that the first positioning unit is retracted in a direction substantially perpendicular to a recording surface of the recording medium being conveyed.   The recording medium reproducing apparatus according to claim 1, wherein the abutting member abuts only the periphery of the recording medium having a large diameter at the other end.   The recording according to any one of claims 1 to 3, wherein the positioning means is movable behind the apparatus so as to be tiltable about an axis substantially parallel to the recording surface of the recording medium as a rotation axis. Medium playback device.

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