JP4133232B2 - Information recording medium reproducing apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an information recording medium reproducing apparatus capable of reproducing and erasing information recorded on an information recording medium and recording information on the information recording medium.
[0002]
[Prior art]
In recent years, information recording media such as compact discs (abbreviated CDs) and digital versatile discs (abbreviated DVDs) have been widely used for recording digital information such as music information, video information or computer information. .
[0003]
FIG. 11 is a sectional view showing a reproducing apparatus 1 for a conventional information recording medium. The information recording medium reproducing apparatus 1 includes a tray 2 and a holder 3. The tray 2 is provided so as to be movable between a loading start position where the disk-shaped recording medium is loaded and a loading completion position where information recorded on the disk-shaped recording medium is reproduced. On the tray 2, a disc-shaped recording medium as an information recording medium is placed.
[0004]
The holder 3 is provided with a spindle motor 4 and an optical pickup 5. The spindle motor 4 is provided with a turntable 6 on which a disk-shaped recording medium is mounted. The optical pickup 5 is provided so as to be movable in the radial direction of the disc-shaped recording medium mounted on the turntable 6 while being guided by the guide shaft 7. This optical pickup 5 has an objective lens 8 and reads information recorded on a disk-shaped recording medium.
[0005]
After the tray 2 moves to the loading completion position, the holding body 3 is angularly displaced, and the disc-shaped recording medium on the tray 2 is mounted on the turntable 6. In this state, the objective lens 8 of the optical pickup 5 maintains a predetermined distance from the disc-shaped recording medium, and information recorded on the disc-shaped recording medium is reproduced. (For example, see Patent Document 1)
[0006]
[Patent Document 1]
JP 9-35277 A
[0007]
[Problems to be solved by the invention]
There are information recording media of a type based on many standards in the information recording medium, and information recording capable of reproducing information recorded on these information recording media and recording information on these information recording media is possible. Media playback devices have been developed and commercialized. These playback apparatuses have different application ranges for information recording media. Therefore, there is a possibility that the operator mistakenly inserts an information recording medium outside the applicable range into the playback device. For example, a mini disc (abbreviated as MD) may be inserted into a playback device that is a compact disc player.
[0008]
In the conventional information recording medium reproducing apparatus 1, when an information recording medium 9 outside the applicable range of the reproducing apparatus 1 is placed on the tray 2, the information recording medium 9 is not mounted on the turntable 6. Sometimes. In such a case, as shown in FIG. 11, there is a problem that the information recording medium 9 and the objective lens 8 collide and the objective lens 8 is damaged.
[0009]
SUMMARY OF THE INVENTION An object of the present invention is to provide an information recording medium reproducing apparatus that prevents the objective lens of the optical pickup from colliding with the object placed on the tray mounting surface and the objective lens of the optical pickup. It is.
[0010]
[Means for Solving the Problems]
The present invention has a mounting surface on which a disk-shaped recording medium is mounted, and extends from a loading start position where the disk-shaped recording medium is loaded and a loading completion position where information recorded on the disk-shaped recording medium is reproduced. A movable tray,
A holding body movable between a reproduction position close to the tray arranged at the loading completion position from below and a reproduction stop position separated from the tray arranged at the loading completion position;
Rotation driving means having a turntable provided on a holder and mounted with a disc-shaped recording medium on a tray disposed at the loading completion position and driven to rotate around a predetermined rotation axis;
An optical pickup that optically reads information recorded on a disk-shaped recording medium and has an objective lens whose top protrudes from the mounting surface described above, and is provided on the holding body;
A lens protection member that is provided on the tray in the vicinity of the optical pickup and is displaced over a protruding position protruding from the top of the objective lens and a retracted position retracted from the top of the objective lens;
A disc detection member that is pressed and displaced by a predetermined disc-shaped recording medium placed on the placement surface of the tray;
Driving means for transmitting the displacement of the disk detection member to the lens protection member, displacing the lens protection member from the protruding position to the retracted position, and holding the lens protection member in the protruding position when the disk detection member is not displaced. And an information recording medium reproducing apparatus.
[0011]
According to the present invention, the tray is movable between the loading start position and the loading completion position, and the holding body is movable between the reproduction position and the reproduction stop position. When the tray is placed at the loading start position, the disc-shaped recording medium is placed and mounted on the placement surface of the tray. The tray loaded with the disk-shaped recording medium moves from the loading start position to the loading completion position. After the tray is arranged at the loading completion position, the holding body moves from the reproduction stop position to the reproduction position. In this way, the disc-shaped recording medium is mounted on the turntable of the rotation driving means provided on the holding body. Further, the top of the objective lens of the optical pickup provided on the holding body protrudes from the mounting surface of the tray.
[0012]
When the disc detection member is not displaced, the driving means holds the lens protection member in the protruding position. The lens protection member is provided in the vicinity of the optical pickup and protrudes from the top of the objective lens at the protruding position. Therefore, when the lens protection member is arranged at the protruding position, even if the holding body moves from the reproduction stop position to the reproducing position and the objective lens of the optical pickup provided on the holding body protrudes from the mounting surface, the objective lens It is possible to prevent the top of the battery from colliding with an object placed on the tray mounting surface. Since the collision between the objective lens and the mounted object can be prevented in this way, it is possible to prevent the objective lens from being damaged due to the collision between the objective lens and the mounted object.
[0013]
When a predetermined disc-shaped recording medium is placed on the placing surface of the tray, the disc detecting member is pressed and displaced by the placed disc-shaped recording medium. The displacement of the disk detection member is transmitted to the lens protection member by the driving means, and thereby the lens protection member is displaced from the protruding position to the retracted position. When the lens protection member is displaced from the protruding position to the retracted position, the disc-shaped recording medium is stabilized on the tray mounting surface. In this manner, with the disc-shaped recording medium being stable, the holder moves from the reproduction stop position to the reproduction position, and the disc-shaped recording medium is mounted on the turntable. Therefore, when the disc-shaped recording medium is mounted on the turntable, it is possible to prevent a problem that the center of the disc-shaped recording medium is displaced from the rotation axis.
[0014]
According to the present invention, the holding body is configured such that when the tray on which a predetermined disc-shaped recording medium is placed is disposed at the loading completion position and the holding body moves to the reproduction position, the disk detection member is pressed to It has a projection for separating the detection member from the disc-shaped recording medium.
[0015]
According to the present invention, when the tray on which the predetermined disc-shaped recording medium is placed is disposed at the loading completion position and the holding body is moved to the reproduction position, the protrusion provided on the holding body causes the disc detection member to By pressing, the disc detection member is separated from the disc-shaped recording medium. As described above, since the holding body moves to the reproduction position and the disc detection member can be separated from the disc-shaped recording medium, an operation for separating the disc detection member from the disc-shaped recording medium is not required. Complicating is prevented, and the fall of operativity can be prevented.
[0016]
The present invention also has a mounting surface on which a cartridge containing a disc-shaped recording medium is placed, and reproduces a loading start position where the cartridge is mounted and information recorded on the disc-shaped recording medium in the cartridge. A tray movable between the loading completion position to be
A holding body movable between a reproduction position close to the tray arranged at the loading completion position from below and a reproduction stop position separated from the tray arranged at the loading completion position;
A rotation driving means having a turntable provided on a holder and mounted with a disk-shaped recording medium in a cartridge on a tray disposed at the loading completion position and driven to rotate around a predetermined rotation axis;
An optical pickup that optically reads information recorded on a disk-shaped recording medium in the cartridge and has a top portion protruding from the mounting surface, and is provided on the holder;
A lens protection member that is provided on the tray in the vicinity of the optical pickup and is displaced over a protruding position protruding from the top of the objective lens and a retracted position retracted from the top of the objective lens;
A cartridge detection member that is displaced by being pressed by a predetermined cartridge placed on the placement surface of the tray;
Driving means for transmitting the displacement of the cartridge detection member to the lens protection member, displacing the lens protection member from the protruding position to the retracted position, and holding the lens protection member in the protruding position when the cartridge detection member is not displaced. And an information recording medium reproducing apparatus.
[0017]
According to the present invention, the tray is movable between the loading start position and the loading completion position, and the holding body is movable between the reproduction position and the reproduction stop position. When the tray is disposed at the loading start position, the cartridge is mounted on the mounting surface of the tray. The tray on which the cartridge is mounted moves from the loading start position to the loading completion position. After the tray is arranged at the loading completion position, the holding body moves from the reproduction stop position to the reproduction position. In this way, the disk-shaped recording medium in the cartridge is mounted on the turntable of the rotation driving means provided on the holder. Further, the top of the objective lens of the optical pickup provided on the holding body protrudes from the mounting surface of the tray.
[0018]
When the cartridge detection member is not displaced, the driving means holds the lens protection member in the protruding position. The lens protection member is provided in the vicinity of the optical pickup and protrudes from the top of the objective lens at the protruding position. Therefore, when the lens protection member is arranged at the protruding position, even if the holding body moves from the reproduction stop position to the reproducing position and the objective lens of the optical pickup provided on the holding body protrudes from the mounting surface, the objective lens It is possible to prevent the top of the battery from colliding with an object placed on the tray mounting surface. Since the collision between the objective lens and the mounted object can be prevented in this way, it is possible to prevent the objective lens from being damaged due to the collision between the objective lens and the mounted object.
[0019]
When a predetermined cartridge is placed on the placement surface of the tray, the cartridge detection member is pressed and displaced by the placed cartridge. The displacement of the cartridge detection member is transmitted to the lens protection member by the driving means, and thereby the lens protection member is displaced from the protruding position to the retracted position. When the lens protection member is displaced from the protruding position to the retracted position, the cartridge is stabilized on the mounting surface of the tray. In this manner, with the cartridge being in a stable state, the holder moves from the reproduction stop position to the reproduction position, and the disc-shaped recording medium in the cartridge is mounted on the turntable. Therefore, when the disc-shaped recording medium in the cartridge is mounted on the turntable, it is possible to prevent a problem that the center of the disc-shaped recording medium is displaced from the rotation axis.
[0020]
In the invention, it is preferable that the cartridge detection member is provided in a region near the corner of the placement surface.
[0021]
According to the present invention, since the cartridge detection member is provided in a region near the corner of the placement surface, the cartridge detection member is pressed by the disc-shaped recording medium not accommodated in the cartridge. There is no. Therefore, it is possible to prevent a collision between the disc-shaped recording medium not accommodated in the cartridge and the objective lens.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a cross-sectional view showing an information recording medium reproducing apparatus 21 according to an embodiment of the present invention. Hereinafter, the information recording medium reproducing device 21 may be referred to as the reproducing device 21. The playback device 21 of the present embodiment is a device for playing back information recorded on a disc-shaped recording medium 22 that is an information recording medium. In this embodiment, an optical disc having a diameter of 120 mm, which is the same as that of a compact disc (Compact Disk, abbreviated as CD) and a digital versatile disc (abbreviated as a DVD), is selected as the predetermined disc-shaped recording medium 22. The reproducing device 21 includes a tray 23, a holding body 24, a rotation driving unit 25, an optical pickup 26, a lens protection member 27, a disk detection member 28, and a driving unit 29.
[0023]
The tray 23 has a placement surface 31 on which the disc-shaped recording medium 22 is placed. The mounting surface 31 is slightly larger in diameter than the disc-shaped recording medium 22. The tray 23 is movable between a loading start position 32 and a loading completion position 33. The loading start position 32 is the position of the tray 23 protruding from the apparatus main body of the reproducing apparatus 21. At this loading start position 32, the disc-shaped recording medium 22 is mounted on the mounting surface 31 of the tray 23. At the loading start position 32, the disc-shaped recording medium 22 placed on the placement surface 31 of the tray 23 is taken out. The loading completion position 33 is a position of the tray 23 when reproducing information recorded on the disk-shaped recording medium 22. The tray 23 reciprocates between a loading start position 32 and a loading completion position 33 by a loading motor (not shown).
[0024]
The holding body 24 is angularly displaceable about an axis L1 extending in parallel with the placement surface 31 of the tray 23 when it is disposed at the loading completion position 33, whereby the reproduction position 34, the reproduction stop position 35, and the like. Is movable. The reproduction position 34 is a position of the holding body 24 that is close to the tray 23 arranged at the loading completion position 33 from below. The regeneration stop position 35 is a position of the holding body 24 that is separated from the tray 23 arranged at the loading completion position 33.
[0025]
The rotation driving means 25 is provided on the holding body 24. The rotation driving means 25 includes a spindle motor and a turntable 36 that is rotationally driven around a predetermined rotation axis L11 by the spindle motor. The disc-shaped recording medium 22 on the tray 23 disposed at the loading completion position 33 is mounted on the turntable 36. The disc-shaped recording medium 22 is separated from the placement surface 31 of the tray 23 by being mounted on the turntable 36.
[0026]
The optical pickup 26 is provided on the holding body 24. The optical pickup 26 has an objective lens 37. The top 38 of the objective lens 37 protrudes by a protrusion amount ΔL1 in a direction perpendicular to the placement surface 31 of the tray 23 when the tray 23 is disposed at the loading completion position 33 and the holding body 23 is disposed at the reproduction position 34. To do. The optical pickup 26 optically reads information recorded on the disk-shaped recording medium 22.
[0027]
The lens protection member 27 is provided on the tray 23 in the vicinity of the optical pickup 26. The lens protection member 27 is displaced over a protruding position 41 that protrudes from the top 38 of the objective lens 37 and a retracted position 42 that retracts from the top 38 of the objective lens 37 (see FIG. 4 described later). The disc detection member 28 is pressed and displaced by a predetermined disc-shaped recording medium 22 placed on the placement surface 31 of the tray 23. The drive unit 29 transmits the displacement of the disk detection member 28 to the lens protection member 27 and displaces the lens protection member 27 from the protruding position 41 to the retracted position 42. Further, the driving means 29 holds the lens protection member 27 at the protruding position 41 when the disc detection member 28 is not displaced.
[0028]
The holding body 24 is provided with a protrusion 39. The projection 39 presses the disc detection member 28 when the tray 23 on which the predetermined disc-shaped recording medium 22 is placed is placed at the loading completion position 32 and the holding body 24 moves to the reproduction position 34. Then, the disk detection member 28 is separated from the disk-shaped recording medium 22.
[0029]
In the present embodiment, the playback device 21 is installed such that the direction perpendicular to the placement surface 31 of the tray 23 when placed at the loading completion position 33 is parallel or substantially parallel to the vertical direction. Is done. Further, in the present embodiment, the placement surface 31 faces the upper side which is one side in the vertical direction, and the holding body 24 is disposed on the lower side which is the other side in the vertical direction from the tray 23.
[0030]
FIG. 2 is a plan view of the playback device 21. The holding body 24 is provided with a pair of parallel guide shafts 51a and 51b extending in a first direction A perpendicular to the rotation axis L11. The optical pickup 26 is guided by guide shafts 51 a and 51 b, and the objective lens 37 of the optical pickup 26 moves along the radial direction of the disc-shaped recording medium 22. As a result, the objective lens 37 moves along the radial direction of the disc-shaped recording medium 22 while maintaining a predetermined distance from the disc-shaped recording medium 22 mounted on the turntable 36.
[0031]
The tray 23 is formed with first to third through holes 52, 53 and 54. The first through hole 52 is formed in a region including the central portion of the placement surface 31 and the moving region of the objective lens 37 of the optical pickup 26. The turntable 36 and the objective lens 37 of the optical pickup 26 are inserted through the first through hole 52. The second through hole 53 is formed in the vicinity of the optical pickup 26 and continues to the first through hole 52. The third through hole 54 is formed in the placement surface 31. The lens protection member 27 is disposed in the second through hole 53, and the disk detection means 28 is disposed in the third through hole 54. A drive unit 29 is interposed between the lens protection member 27 and the disk detection unit 28.
[0032]
FIG. 3 is a perspective view of the tray 23 as viewed from below. The lens protection member 27 and the disk detection member 28 are supported so as to be angularly displaceable about axes L21 and L22 extending parallel to the placement surface 31 of the tray 23. The axes L21 and L22 are parallel to each other. The lens protection member 27 is provided with a spring 73. By this spring 73, the lens protection member 27 is urged in one angular displacement direction R1a in which the lens protection member 27 is displaced from the retracted position 42 to the protruding position 41. The disc detection member 28 is provided with a spring 74. The disc detection member 28 is biased by the spring 74 in one of the angular displacement directions R2a in which the displacement is prevented (see FIG. 4 described later).
[0033]
The lens protection member 27 has first and second extending portions 61 and 62. The first and second extending portions 61 and 62 extend in one direction perpendicular to the axis L21 of the lens protection member 27. The first extending portion 61 is disposed on the opposite side of the second extending portion 62 with respect to the axis L <b> 21 of the lens protection member 27.
[0034]
The disk detection member 28 includes third and fourth extending portions 63 and 64, a cam portion 65, and a convex portion 66. The third and fourth extending portions 63 and 64 extend in one direction perpendicular to the axis L22 of the disc detection member 28. The third extending portion 63 is disposed on the opposite side of the fourth extending portion 64 with respect to the axis L22 of the disc detection member 28. A cam portion 65 is curved and connected to the free end portion of the fourth extending portion 64. The cam portion 65 has an abutting surface that inclines in the angular displacement direction R2a as the disc detection member 28 moves away from the axis L22. This contact surface is a smooth curved surface. A convex portion 66 is curved and connected to the tip of the cam portion 65. The convex portion 66 is parallel to the third and fourth extending portions 63 and 64.
[0035]
The driving means 29 is provided on the opposite side of the mounting surface 31 of the tray 23. The drive means 29 includes a slide member 71, a tension spring 72, and a spring 73 provided on the lens protection member 27.
[0036]
The slide member 71 has a longitudinal plate-like base 75. Extending portions 76 and 77 extending in the longitudinal direction of the base 75 are connected to both ends in the longitudinal direction of the end portion on one side in the width direction of the base 75. First and second pins 78 and 79 extending toward the other side in the width direction of the base 75 are connected to the free ends of the extending portions 76 and 77. The first pin 78 contacts the lens protection member 27, and the second pin 79 contacts the contact surface of the disk detection member 28.
[0037]
A pair of grooves 81 a and 81 b are formed in the base 75 along the longitudinal direction of the base 75. Each groove 81a, 81b extends in the longitudinal direction of the base 75. The tray 23 is provided with a pair of guide members 82a and 82b. Each guide member 82a, 82b passes through each groove 81a, 81b of the base 75. The slide member 71 is guided by the guide members 82a and 82b. In this way, the slide member 71 is mounted on the tray 23 so as to be slidable along the longitudinal direction.
[0038]
In this embodiment, the direction in which the slide member 71 slides is referred to as the slide direction S. In addition, the direction from the lens protection member 27 toward the disk detection member 28 is defined as one slide direction S1, and the direction from the disk detection member 28 toward the lens protection member 27 is defined as the other slide direction S2.
[0039]
First and second projecting portions 86 and 87 projecting to the other side in the width direction of the base portion 75 are provided at the end portion on the other side in the width direction of the base portion 75. The first protrusion 86 is disposed on the other side S <b> 2 in the sliding direction with respect to the second protrusion 87. A stopper portion 88 is provided on the tray 23. The stopper portion 88 is disposed on the other side S <b> 2 in the sliding direction from the first protrusion 86. The first protrusion 86 abuts on the stopper 88, and the displacement of the slide member 71 in the other sliding direction S2 is prevented.
[0040]
One end of a tension spring 72 is attached to the second protrusion 87. The other end of the tension spring 72 is attached to an attachment 89 provided on the tray 23. The attachment portion 89 is disposed on the other side S2 in the sliding direction with respect to the second protrusion 87. By the tension spring 72, the slide member 71 is biased in the other sliding direction S2.
[0041]
4 is a cross-sectional view of the tray 23, FIG. 4 (1) is a diagram showing a natural state in which the disc detection member 28 is not pressed, and FIG. 4 (2) is a press in which the disc detection member 28 is pressed. It is a figure which shows a state.
[0042]
In a natural state where the disk detection member 28 is not pressed, the third extending portion 63 of the disk detection member 28 protrudes from the placement surface 31 as shown in FIG. The third extending portion 63 of the disk detection member 28 is inclined toward the other side S <b> 2 in the sliding direction as the distance from the placement surface 31 increases. The second pin 79 of the slide member 71 abuts on a portion of the abutment surface of the cam portion 65 of the disc detection member 28 that is closer to the fourth extending portion 64. The first projecting portion 86 of the slide member 71 contacts the stopper portion 88. The slide member 71 is in the most displaced state in the other sliding direction S2, and the tension spring 72 is in a degenerated state. The first pin 78 is located on the other side S <b> 2 in the sliding direction from the axis L <b> 21 of the lens protection member 27, and holds the lens protection member 27 at the protruding position 41.
[0043]
At the protruding position 41, the lens protection member 27 protrudes by a protrusion amount ΔL2 from the placement surface 31 in the vertical direction. The protrusion amount ΔL2 of the lens protection member 27 is larger than the protrusion amount ΔL1 of the top portion 38 of the objective lens 37 (ΔL2> ΔL1). At the protruding position 41, the second extending portion 62 of the lens protection member 27 is inclined toward the one side S1 in the sliding direction as the distance from the placement surface 31 increases.
[0044]
In the pressed state in which the disk detection member 28 is pressed, the third extending portion 63 of the disk detection member 28 is retracted from the placement surface 31 as shown in FIG. The second pin 79 of the slide member 71 comes into contact with a portion of the contact surface of the cam portion 65 of the disc detection member 28 that is close to the convex portion 66. The first projecting portion 86 of the slide member 71 is separated from the stopper portion 88. The slide member 71 is in the most displaced state in the sliding direction S1, and the tension spring 72 is in the extended state. The first pin 78 is located on the one side S <b> 1 in the sliding direction from the axis L <b> 21 of the lens protection member 27, and holds the lens protection member at the retracted position 42.
[0045]
FIG. 5 is a cross-sectional view of the tray 23. FIG. 5 (1) shows a state in which an object other than the predetermined disc-shaped recording medium 22 is placed on the tray 23. FIG. 5 (2) shows a predetermined disc. A state in which a mounted object other than the recording medium 22 is mounted on the turntable 36 is shown. In the present embodiment, the “placement” refers to a compact disc or a mini disc (abbreviated as MD) having a different size from the compact disc when the predetermined disc-shaped recording medium 22 is a compact disc. is there. Here, a case where a mini-disc 96 is placed as a placed object other than the predetermined disc-shaped recording medium 22 is shown.
[0046]
When the mini disc 96 is placed on the tray 23, the mini disc 96 is placed on the lens protection member 27 at the protruding position 41 as shown in FIG. At this time, the lens protection member 27 is pressed by the mini-disc 96 and tries to be angularly displaced in one of the angular displacement directions R1a. However, since the first projecting portion 86 of the slide member 71 is in contact with the stopper portion 88, the first The 1 pin 78 is not displaced in the other direction S2 in the sliding direction, and therefore is not angularly displaced in one direction R1a in the angular displacement direction.
[0047]
With the mini disk 96 placed on the lens protection member 27 at the protruding position 41, the tray 23 moves from the loading start position 32 to the loading completion position 33 as shown in FIG. 24 moves from the reproduction stop position 35 to the reproduction position 34. Since the disc detection member 28 is not angularly displaced in the other angular displacement direction R2b, the protrusion 39 of the holding body 24 does not contact the convex portion 66 of the disc detection member 28.
[0048]
When the holding body 24 completes the movement to the reproduction position 34, the top portion 38 of the objective lens 37 of the optical pickup 26 protrudes from the placement surface 31 of the tray 23 by a protrusion amount ΔL1. At this time, since the lens protection member 27 protrudes by a protrusion amount ΔL2 (ΔL2> ΔL1) larger than the protrusion amount ΔL1 of the top portion 38 of the objective lens 37, the mini disc 96 is prevented from colliding with the objective lens 37. .
[0049]
The lens protection member 27 and the disk detection member 28 are arranged at a predetermined interval. This predetermined interval is larger than the size of the mini disk 96. In this case, even if the disc detection member 28 is displaced by the minidisc 96 pressing the disc detection member 28 and the lens protection member 27 is displaced to the retracted position 42, the minidisc 96 does not reach the optical pickup 26. . Therefore, the mini disk 96 and the objective lens 37 of the optical pickup 26 do not collide.
[0050]
In the present embodiment, not only when the mini-disc 96 is placed on the tray 23, but a disc-shaped recording medium having a diameter smaller than the predetermined distance between the lens protection member 27 and the disc detection member 28 is erroneously placed on the tray 23. Even if it is placed, collision between the placed object and the objective lens 37 can be prevented.
[0051]
6 is a cross-sectional view of the tray 23. FIG. 6 (1) shows a state in which a predetermined disc-shaped recording medium 22 is placed on the tray 23, and FIG. 6 (2) shows a predetermined disc-shaped recording medium 22. Shows a state of being attached to the turntable 36.
[0052]
When the predetermined disc-shaped recording medium 22 is placed on the placement surface 31 of the tray 23, the disc-detecting member 28 is pressed by the placed disc-shaped recording medium 22 and displaced in the other angular displacement direction R2b. Due to this displacement, the second pin 79 that abuts against the abutment surface of the cam portion 65 of the disc detection member 28 is displaced in one direction S1 in the sliding direction. As a result, the slide member 71 slides and displaces in one direction S1 in the sliding direction against the urging force of the tension spring 72. Due to the displacement of the first pin 78 of the slide member 71, the lens protection member 27 is displaced in the other angular displacement direction R1b. In this way, the lens protection member 27 is displaced from the protruding position 41 to the retracted position 42 as shown in FIG.
[0053]
With the predetermined disc-shaped recording medium 22 placed on the tray 23, the tray 23 moves from the loading start position 32 to the loading completion position 33 as shown in FIG. Move from the stop position 35 to the playback position 34. When the holding body 24 moves from the reproduction stop position 35 to the reproduction position 34, the disc-shaped recording medium 22 placed on the placement surface 31 of the tray 23 is mounted on the turntable 36. As a result, the disc-shaped recording medium 22 is separated from the placement surface 31 of the tray 23. Thus, the disk-shaped recording medium 22 is reproduced.
[0054]
When the disk-shaped recording medium 22 is separated from the mounting surface 31 of the tray 23, the disk detection member 28 pressed by the disk-shaped recording medium 22 is angularly moved in the angular displacement direction one R2a by the urging force of the tension spring 72. Although it is going to be displaced, the protrusion 39 of the holding body 24 comes into contact with the convex portion 66 of the disk detection member 28 to prevent angular displacement of the disk detection member 28. This prevents the disc detection member 28 from coming into contact with the disc-shaped recording medium 22 during reproduction of the disc-shaped recording medium 22.
[0055]
In the present embodiment, when the disc detection member 28 is not displaced, the driving unit 29 holds the lens protection member 27 at the protruding position 41. The lens protection member 27 is provided in the vicinity of the optical pickup 26 and protrudes from the top portion 38 of the objective lens 37 at the protruding position 41. Therefore, when the lens protection member 27 is disposed at the protruding position 41, the holding body 24 moves from the reproduction stop position 35 to the reproduction position 34, and the objective lens 37 of the optical pickup 26 provided on the holding body 24 is placed on the mounting surface. Even if it protrudes from 31, it is possible to prevent the top portion 38 of the objective lens 37 from colliding with a placement object placed on the placement surface 31 of the tray 23. Thus, since the collision between the objective lens 37 and the placed object can be prevented, the objective lens 37 can be prevented from being damaged due to the collision between the objective lens 37 and the placed object.
[0056]
When the predetermined disc-shaped recording medium 22 is placed on the placement surface 31 of the tray 23, the disc detection member 28 is pressed and displaced by the placed disc-shaped recording medium 22. The displacement of the disk detection member 28 is transmitted to the lens protection member 27 by the driving means 29, whereby the lens protection member 27 is displaced from the protruding position 41 to the retracted position 42. As the lens protection member 27 is displaced from the protruding position 41 to the retracted position 42, the disc-shaped recording medium 22 is stabilized on the mounting surface 31 of the tray 23. In this manner, with the disc-shaped recording medium 22 in a stable state, the holder 24 moves from the reproduction stop position 35 to the reproduction position 34, and the disc-shaped recording medium 22 is mounted on the turntable 36. Therefore, when the disc-shaped recording medium 22 is mounted on the turntable 36, it is possible to prevent a problem that the center of the disc-shaped recording medium 22 is displaced from the rotation axis L11.
[0057]
Further, in this embodiment, when the tray 23 on which the predetermined disc-shaped recording medium 22 is placed is placed at the loading completion position 33 and the holding body 24 moves to the reproduction position 34, the protrusion provided on the holding body 24 The unit 39 presses the disc detection member 28 to separate the disc detection member 28 from the disc-shaped recording medium 22. As described above, since the holding body 24 moves to the reproduction position 34 and the disc detection member 28 can be separated from the disc-shaped recording medium 22, an operation for separating the disc detection member 28 from the disc-shaped recording medium 22 is performed. Therefore, the operation is not complicated, and the operability can be prevented from being lowered.
[0058]
In the present embodiment, the lens protection member 27, the disk detection member 28, and the drive means 29 are all provided on the tray 23. In this configuration, it is possible to facilitate the transmission of displacement by the driving unit 29.
[0059]
FIG. 7 is a diagram showing an information recording medium reproducing apparatus 101 according to another embodiment of the present invention, and FIG. 8 is a plan view of the information recording medium reproducing apparatus 101. Hereinafter, the information recording medium reproducing apparatus 101 may be referred to as the reproducing apparatus 101. The reproducing apparatus 101 according to the present embodiment is an apparatus that reproduces information recorded on a disk-shaped recording medium 103 in a cartridge 102 that is an information recording medium. The playback apparatus 101 of this embodiment is similar to the playback apparatus 21 of the above-described embodiment. In the present embodiment, the same parts as those of the playback device 21 of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.
[0060]
The tray 123 has a placement surface 131 on which the cartridge 102 is placed. The reproducing apparatus 101 includes a cartridge detection member 128 instead of the disk detection member 28. The cartridge detection member 128 has substantially the same shape as the disk detection member 28, and includes a third extension part 63, a fourth extension part 64, and a cam part 65. The cartridge detection member 128 is provided in the area 104 near the corner of the placement surface 131. The near-corner region 104 is a region of the placement surface 131 excluding the movable range of the placement object 110 placed on the placement surface 131.
[0061]
In the present embodiment, the “placement” is a disc-shaped recording medium that is not accommodated in a cartridge, such as a compact disc and a digital versatile disc.
[0062]
FIG. 9 is a diagram showing a state where the disc-shaped recording medium 103 in the predetermined cartridge 102 is mounted on the turntable 36. When a predetermined cartridge 102 is placed on the placement surface 131 of the tray 123, the cartridge detection member 128 is pressed by the placed cartridge 102 and displaced in the other angular displacement direction R2b. Due to this displacement, the second pin 79 that abuts against the abutment surface of the cam portion 65 of the cartridge detection member 128 is displaced in the sliding direction one side S1. As a result, the slide member 71 slides and displaces in one direction S1 in the sliding direction against the urging force of the tension spring 72. Due to the displacement of the first pin 78 of the slide member 71, the lens protection member 27 is displaced in the other angular displacement direction R1b. In this way, the lens protection member 27 is displaced from the protruding position 41 to the retracted position 42.
[0063]
With the predetermined cartridge 102 placed on the tray 123, the tray 123 moves from the loading start position 32 to the loading completion position 33, and the holding body 24 moves from the reproduction stop position 35 to the reproduction position 34. When the holder 24 moves from the reproduction stop position 35 to the reproduction position 34, the disc-shaped recording medium 103 in the cartridge 102 that has been placed on the placement surface 131 of the tray 123 is mounted on the turntable 36. In this way, the disk-shaped recording medium 103 in the cartridge 102 is reproduced.
[0064]
FIG. 10 is a diagram illustrating a state in which the placement object 110 other than the predetermined cartridge 102 is mounted on the turntable 36. When the placement object 110 is placed on the tray 123, the placement object 110 is placed on the lens protection member 27. At this time, the lens protection member 27 is pressed by the mounted object 110 and tries to be angularly displaced in one of the angular displacement directions R1a, but the first projecting portion 86 of the slide member 71 is in contact with the stopper portion 88. The 1 pin 78 is not displaced in the other direction S2 in the sliding direction, and therefore is not angularly displaced in the one direction R1a in the angular displacement direction.
[0065]
The tray 123 moves from the loading start position 32 to the loading completion position 33 in a state where the placement object 110 is placed on the lens protection member 27 at the protruding position 41, and the holding body 24 moves from the reproduction stop position 35 to the reproduction position 34. Moving. When the holder 24 completes the movement to the reproduction position 34, the top portion 38 of the objective lens 37 of the optical pickup 26 protrudes from the mounting surface 131 of the tray 123 by a protrusion amount ΔL1 in the vertical direction. At this time, since the lens protection member 27 protrudes by a protrusion amount ΔL2 that is larger than the protrusion amount ΔL1 of the top portion 38 of the objective lens 37, the placement object 110 is prevented from colliding with the objective lens 37.
[0066]
In the present embodiment, when the cartridge detection member 128 is not displaced, the drive unit 29 holds the lens protection member 27 at the protruding position 41. The lens protection member 27 is provided in the vicinity of the optical pickup 26 and protrudes from the top portion 38 of the objective lens 37 at the protruding position 41. Therefore, when the lens protection member 27 is disposed at the protruding position 41, the holding body 24 moves from the reproduction stop position 35 to the reproduction position 34, and the objective lens 37 of the optical pickup 26 provided on the holding body 24 is placed on the mounting surface. Even if it protrudes beyond 131, it is possible to prevent the top portion 38 of the objective lens 37 from colliding with a placement object placed on the placement surface 131 of the tray 123. Thus, since the collision between the objective lens 37 and the placed object can be prevented, the objective lens 37 can be prevented from being damaged due to the collision between the objective lens 37 and the placed object.
[0067]
When the predetermined cartridge 102 is placed on the placement surface 131 of the tray 123, the cartridge detection member 128 is pressed and displaced by the placed cartridge 102. The displacement of the cartridge detection member 128 is transmitted to the lens protection member 27 by the driving unit 29, whereby the lens protection member 27 is displaced from the protruding position 41 to the retracted position 42. When the lens protection member 27 is displaced from the protruding position 41 to the retracted position 42, the cartridge 102 is stabilized on the mounting surface 131 of the tray 123. In this manner, with the cartridge 102 being stable, the holder 24 moves from the reproduction stop position 35 to the reproduction position 34, and the disc-shaped recording medium 103 in the cartridge 102 is mounted on the turntable 36. Therefore, when the disc-shaped recording medium 103 in the cartridge 102 is mounted on the turntable 36, it is possible to prevent a problem that the center of the disc-shaped recording medium 103 is shifted from the rotation axis L11.
[0068]
In the present embodiment, the cartridge detection member 128 is provided in the area 104 near the corner of the mounting surface 131, so that the cartridge detection member 128 is a disc-shaped recording medium that is not accommodated in the cartridge 102. It will not be pressed. Therefore, it is possible to prevent a collision between the disc-shaped recording medium not accommodated in the cartridge 102 and the objective lens 37.
[0069]
【The invention's effect】
As described above, according to the present invention, when the disc detection member is not displaced, the driving means holds the lens protection member in the protruding position. The lens protection member is provided in the vicinity of the optical pickup and protrudes from the top of the objective lens at the protruding position. Therefore, when the lens protection member is arranged at the protruding position, even if the holding body moves from the reproduction stop position to the reproducing position and the objective lens of the optical pickup provided on the holding body protrudes from the mounting surface, the objective lens It is possible to prevent the top of the battery from colliding with an object placed on the tray mounting surface. Since the collision between the objective lens and the mounted object can be prevented in this way, it is possible to prevent the objective lens from being damaged due to the collision between the objective lens and the mounted object.
[0070]
When a predetermined disc-shaped recording medium is placed on the placing surface of the tray, the disc detecting member is pressed and displaced by the placed disc-shaped recording medium. The displacement of the disk detection member is transmitted to the lens protection member by the driving means, and thereby the lens protection member is displaced from the protruding position to the retracted position. When the lens protection member is displaced from the protruding position to the retracted position, the disc-shaped recording medium is stabilized on the tray mounting surface. In this manner, with the disc-shaped recording medium being stable, the holder moves from the reproduction stop position to the reproduction position, and the disc-shaped recording medium is mounted on the turntable. Therefore, when the disc-shaped recording medium is mounted on the turntable, it is possible to prevent a problem that the center of the disc-shaped recording medium is displaced from the rotation axis.
[0071]
Further, according to the present invention, since the holding body moves to the reproduction position and the disc detection member can be separated from the disc-shaped recording medium, there is no need for an operation for separating the disc detection member from the disc-shaped recording medium. Therefore, complication of operation can be prevented and deterioration in operability can be prevented.
[0072]
According to the invention, when the cartridge detection member is not displaced, the driving means holds the lens protection member in the protruding position. The lens protection member is provided in the vicinity of the optical pickup and protrudes from the top of the objective lens at the protruding position. Therefore, when the lens protection member is arranged at the protruding position, even if the holding body moves from the reproduction stop position to the reproducing position and the objective lens of the optical pickup provided on the holding body protrudes from the mounting surface, the objective lens It is possible to prevent the top of the battery from colliding with an object placed on the tray mounting surface. Since the collision between the objective lens and the mounted object can be prevented in this way, it is possible to prevent the objective lens from being damaged due to the collision between the objective lens and the mounted object.
[0073]
When a predetermined cartridge is placed on the placement surface of the tray, the cartridge detection member is pressed and displaced by the placed cartridge. The displacement of the cartridge detection member is transmitted to the lens protection member by the driving means, and thereby the lens protection member is displaced from the protruding position to the retracted position. When the lens protection member is displaced from the protruding position to the retracted position, the cartridge is stabilized on the mounting surface of the tray. In this manner, with the cartridge being in a stable state, the holder moves from the reproduction stop position to the reproduction position, and the disc-shaped recording medium in the cartridge is mounted on the turntable. Therefore, when the disc-shaped recording medium in the cartridge is mounted on the turntable, it is possible to prevent a problem that the center of the disc-shaped recording medium is displaced from the rotation axis.
[0074]
According to the invention, since the cartridge detection member is provided in a region near the corner of the mounting surface, the cartridge detection member is pressed by the disc-shaped recording medium not accommodated in the cartridge. There is nothing. Therefore, it is possible to prevent a collision between the disc-shaped recording medium not accommodated in the cartridge and the objective lens.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an information recording medium reproducing apparatus 21 according to an embodiment of the present invention.
FIG. 2 is a plan view of the playback device 21. FIG.
FIG. 3 is a perspective view of the tray 23 as viewed from below.
4 is a cross-sectional view of the tray 23. FIG. 4 (1) is a diagram showing a natural state in which the disc detection member 28 is not displaced, and FIG. It is a figure which shows a state.
FIG. 5 is a cross-sectional view of the tray 23. FIG. 5 (1) shows a state in which an object other than the predetermined disc-shaped recording medium 22 is placed on the tray 23, and FIG. 5 (2) shows a predetermined disc. A state in which a mounted object other than the recording medium 22 is mounted on the turntable 36 is shown.
6 is a cross-sectional view of the tray 23. FIG. 6 (1) shows a state in which a predetermined disc-shaped recording medium 22 is placed on the tray 23, and FIG. 6 (2) shows a predetermined disc-shaped recording medium 22. Shows a state of being attached to the turntable 36.
FIG. 7 is a diagram showing an information recording medium playback apparatus 101 according to another embodiment of the present invention.
FIG. 8 is a plan view of a reproducing apparatus 101 for an information recording medium.
9 is a view showing a state in which a disc-shaped recording medium 103 in a predetermined cartridge 102 is mounted on a turntable 36. FIG.
10 is a diagram showing a state in which a placement object other than a predetermined cartridge is mounted on a turntable. FIG.
FIG. 11 is a cross-sectional view showing a reproducing apparatus 1 for a conventional information recording medium.
[Explanation of symbols]
21,101 Information recording medium reproducing apparatus
22 Disc-shaped recording medium
23,123 trays
24 Holder
25 Rotation drive means
26 Optical pickup
27 Lens protection member
28,128 disc detection member
29 Driving means
31, 131 mounting surface
32 Loading start position
33 Loading completion position
34 Playback position
35 Playback stop position
36 Turntable
37 Objective lens
38 Top
39 Protrusion
41 Projection position
42 Retraction position
102 cartridge

Claims (4)

A tray having a mounting surface on which a disk-shaped recording medium is mounted and movable between a loading start position where the disk-shaped recording medium is loaded and a loading completion position where information recorded on the disk-shaped recording medium is reproduced. When,
A holding body movable between a reproduction position close to the tray arranged at the loading completion position from below and a reproduction stop position separated from the tray arranged at the loading completion position;
Rotation driving means having a turntable provided on a holder and mounted with a disc-shaped recording medium on a tray disposed at the loading completion position and driven to rotate around a predetermined rotation axis;
An optical pickup that optically reads information recorded on a disk-shaped recording medium and has an objective lens whose top protrudes from the mounting surface described above, and is provided on the holding body;
A lens protection member that is provided on the tray in the vicinity of the optical pickup and is displaced over a protruding position protruding from the top of the objective lens and a retracted position retracted from the top of the objective lens;
A disc detection member that is pressed and displaced by a predetermined disc-shaped recording medium placed on the placement surface of the tray;
Driving means for transmitting the displacement of the disk detection member to the lens protection member, displacing the lens protection member from the protruding position to the retracted position, and holding the lens protection member in the protruding position when the disk detection member is not displaced. And an information recording medium reproducing apparatus. The holding body is configured such that when the tray on which a predetermined disc-shaped recording medium is placed is disposed at the loading completion position and the holding body is moved to the reproduction position, the disk detection member is pressed to make the disk detection member 2. A reproducing apparatus for an information recording medium according to claim 1, further comprising a protruding portion that is separated from the recording medium. A loading start position at which the cartridge in which the cartridge in which the disk-shaped recording medium is accommodated is placed is loaded; and a cartridge loading position for reproducing information recorded on the disk-shaped recording medium in the cartridge; A tray that can be moved over,
A holding body movable between a reproduction position close to the tray arranged at the loading completion position from below and a reproduction stop position separated from the tray arranged at the loading completion position;
A rotation driving means having a turntable provided on a holder and mounted with a disk-shaped recording medium in a cartridge on a tray disposed at the loading completion position and driven to rotate around a predetermined rotation axis;
An optical pickup that optically reads information recorded on a disk-shaped recording medium in the cartridge and has a top portion protruding from the mounting surface, and is provided on the holder;
A lens protection member that is provided on the tray in the vicinity of the optical pickup and is displaced over a protruding position protruding from the top of the objective lens and a retracted position retracted from the top of the objective lens;
A cartridge detection member that is displaced by being pressed by a predetermined cartridge placed on the placement surface of the tray;
Driving means for transmitting the displacement of the cartridge detection member to the lens protection member, displacing the lens protection member from the protruding position to the retracted position, and holding the lens protection member in the protruding position when the cartridge detection member is not displaced. And an information recording medium reproducing apparatus. 4. The information recording medium reproducing apparatus according to claim 3, wherein the cartridge detection member is provided in a region near the corner of the mounting surface.

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