JP3806692B2 - Disc player - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a disc player for reproducing a disc (recording medium) such as a CD or a DVD.
[0002]
[Prior art]
Conventionally, portable and vehicle-mounted disc players have been proposed. In recent years, a disc player that can reproduce both an 8 cm disc and a 12 cm disc has been proposed (see Patent Document 1). Furthermore, a disc player that can reproduce not only a CD but also a DVD has been proposed.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-143352
[Problems to be solved by the invention]
In such a disc player, considering use in a place where an impact or vibration may occur, such as an in-vehicle disc player, an elastic support state is set so that the impact or the like is not transmitted to the reproduction unit. In addition, when the disc is being transported into the device, it is also necessary to prevent the disc from hitting the transport roller due to impact, etc., but its mechanism is to reduce the size and cost of the device. A simple mechanism with a small number of parts is desired.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, a disc player according to the present invention provides:
Chassis base,
A transport mechanism provided in the chassis base so as to be fixed or elastically supported with respect to the chassis base, and having a roller that contacts the disk and transports the disk into the chassis base; A main unit chassis comprising a playback unit for playing back a disc, a slider, and a lock mechanism;
In a disc player with
The slider includes a first groove that engages with the transport mechanism and a second groove that engages with the lock mechanism;
When the main body chassis is in a fixed state by engagement of the lock mechanism with an engagement hole provided in the chassis base, the slider moves when the disk is transported to the reproduction position by the transport mechanism, and the slider When the transport mechanism moves along the first groove, the roller retracts from the disk, and the lock mechanism rotates along the second groove in parallel with the moving direction of the slider. The main body chassis is configured to be in an elastically supported state by being detached from the engagement hole.
[0007]
With the above configuration, with a simple configuration, when the disc is moved to the playback position, an operation to make an elastic support state so that an impact or the like is not transmitted to the playback unit, and so that the disc does not hit the conveyance roller, etc. Can be performed.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
(Outline of disc player)
FIG. 1 shows a disc player (chassis part) in which various drive mechanisms are omitted. FIG. 1 (a) is a plan view, FIG. 1 (b) is a front view, and FIG. 1 (c) is a right side view. is there. A disc player main body 1 (a main body chassis 11 is shown in FIG. 1) is provided in a chassis base 101. The main chassis 11 is elastically supported in the chassis base 101 by coil spring dampers 102 (disposed at three locations) provided on the lower surface side thereof. A disk loading port 20 is formed on the front side of the chassis base 101. The disc loading port 20 is provided with a resin-made right disc guide 2R and a left disc guide 2L, and the disc loading port 20 is generally T-shaped. The distance between the upper right end of the right disc guide 2R and the upper left end of the left disc guide 2L corresponds to a 12 cm disc. The distance between the inner wall surface of the right disk guide 2R and the inner wall surface of the left disk guide 2L is somewhat narrower than the diameter of the 8 cm disk.
[0009]
There is a difference between the operation when inserting a 12 cm disc and the operation when inserting an 8 cm disc. This will be described in detail later.
[0010]
Here, in this disc player, there are a disc rotation state (play state), a disc insertion / removal state (eject state), and a transition state between the eject state and the play state. Hereinafter, the outline related to the disk conveyance in each state will be described based on FIG. 2 and FIG. 3, and the outline related to the driving force transmission of the motor 12 in each state will be described based on FIG. 3 to FIG.
[0011]
(1) Play status (disc transport related)
FIG. 2 is a view of the main body chassis 11 as viewed from the left side in FIG. As shown in FIG. 2A, the clamper 3 is lowered, and a disk (not shown) is clamped. When the clamper 3 is in the position of FIG. 2 (a), it is called a lowered state, and when it is in the position of FIG. 2 (b), it is called a floating state, and the clamper 3 has a fulcrum portion 3a. It swings around 3a as a fulcrum and forms a floating state and a descending state. Further, the fulcrum portions 3a and 3a are allowed to move in the vertical direction and are restricted from moving in the left-right direction. The flange portion 3b of the clamper 3 is provided in a disk shape so as to be rotatable. A disk receiving portion 4 is disposed at a position facing the flange portion 3b. The disk receiving part 4 is rotated by a motor (not shown). The center of the disc loaded in the disc player main body 1 is clamped by the flange portion 3 b and the disc receiving portion 4, and is rotated by the rotation of the disc receiving portion 4.
[0012]
In the vicinity of the disc loading port 20 (see FIG. 1), a transport roller 5 for taking in and out the disc to and from the disc player main body 1 is provided (see FIG. 3). In the play state, the transport roller 5 finishes transporting the disk and is separated from the disk by the retraction operation by the roller drive mechanism 50.
[0013]
The roller drive mechanism 50 includes a mounting plate 51, torsion springs 52R and 52L, a first roller gear 53, a second roller gear 54, and a third roller gear 55, and these gear groups. Is provided on the left side surface of the disc player body 1. The third roller gear 55 is provided to be rotatable about an axis fixed to the left side surface of the main body chassis 11. A driving force is transmitted to the third roller gear 55 from a transmission gear 56 (see FIG. 3).
[0014]
The second roller gear 54 meshes with the third roller gear 55 and is engaged with the shaft of the third roller gear 55 by the link lever 57. The second roller gear 54 can rotate and move its axis. The first roller gear 53 meshes with the second roller gear 54 and is engaged with the shaft of the second roller gear 54 by the link lever 58. The first roller gear 53 can rotate and move its axis.
[0015]
The shaft of the first roller gear 53 is provided on the mounting plate 51. The mounting plate 51 is provided so as to be rotatable about the support shaft of the torsion spring 52L. Further, the transport roller 5 described above is connected to the shaft of the first roller gear 53. Accordingly, the position of the transport roller 5 is changed by the rotation of the mounting plate 51, and a disk transport state and a retracted state from the disk can be formed.
[0016]
Sliders 6L and 6R are provided at positions on both sides of the main chassis 11 as shown in FIG. FIG. 3D shows an enlarged slider 6L (note that FIG. 3D shows an ejected state). The slider 6L includes a main body portion located on the side surface of the main body chassis 11 and a drive assisting portion 600 located on the upper surface side of the main body chassis 11. The relationship between the main body unit and the drive assisting unit 600 will be described in “Outline of transmission force transmission of the motor 12”.
[0017]
In the play state, the sliders 6L and 6R are positioned closest to the front. An inclined (stepped) first guide groove 61 is formed in the sliders 6L and 6R. The shaft of the first roller gear 53 is engaged with the first guide groove 61. In the state where the sliders 6L and 6R are positioned on the most front side, the shaft of the first roller gear 53 is engaged with the lower side (back side) of the first guide groove 61 as shown in FIG. Thus, the mounting plate 51 rotates against the urging force of the torsion springs 52L and 52R, and the conveying roller 5 is lowered and retracted from the disk.
[0018]
An inclined (stepped) second guide groove 62 is formed in the sliders 6L and 6R. The guide protrusions 13a of the lock levers 13L and 13R are engaged with the second guide groove 62. The lock levers 13L and 13R are provided so as to be rotatable about a shaft 13b. In the state where the sliders 6L and 6R are located on the most front side, the guide convex portion 13a is engaged with the lower side (back side) of the second guide groove 62, and the upper end portion 13c (see FIG. 2) is disengaged from an engagement hole (not shown) on the upper surface of the chassis base 101. Therefore, in the play state, the elastic support state of the main body chassis 11 by the coil spring damper 102 described above is formed.
[0019]
A push-up protrusion 64 is formed on the slider 6L. In the play state, the push-up protrusion 64 is separated from the engagement piece 3c (see FIG. 2) of the clamper 3, and the clamper 3 is in the lowered state.
[0020]
(2) Transition status (disc transport related)
FIG. 2B shows a state at the end of the transition (a state just before complete ejection). In this transition state, the sliders 6L and 6R are located on the back side. In the state shown in the drawing, the shaft of the first roller gear 53 is engaged with a position on the near side of the first guide groove 61, and the mounting plate 51 is rotated by the urging force of the torsion springs 52L and 52R. Move up. Further, in this state, the guide protrusion 13a is engaged with the upper step portion of the second guide groove 62, and the upper end portions 13c of the lock levers 13L and 13R are engaged with the engagement holes on the upper surface of the chassis base 101. The elastic support of the main body chassis 11 by the coil spring damper 102 is released (the main body chassis 11 is positioned and fixed to the chassis base 101). In this state, the push-up protrusion 64 comes into contact with the engagement piece 3c of the clamper 3, and the clamper 3 is lifted.
[0021]
(3) Eject status (related to disc transport)
In the ejected state, the sliders 6L and 6R are located on the farthest side. In this state, the shaft of the first roller gear 53 is engaged with the foremost side of the first guide groove 61, the transport roller 5 moves to the uppermost position, and the disk can be transported. The front side portion of the first guide groove 61 is formed to be somewhat larger in the height direction, and the axial movement of the first roller gear 53 (movement of the conveying roller 5) is allowed. That is, when the disk is inserted, the conveying roller 5 can be lowered somewhat by being pushed by the disk. Further, in this ejected state, the positioning and fixing state of the main body chassis 11 is maintained and the state in which the clamper 3 is floated is maintained.
[0022]
(4) Ejected state (related to driving force of motor 12)
FIGS. 3A, 3B, 3C, and 3D show the ejected state. In this state, the disc can be loaded into the player main unit 1. In FIG. 3, when the sensor 14 detects that a disk has been inserted into the disk loading slot 20, electric power is supplied to the motor 12, and the motor 12 rotates. A driving force is transmitted to the first gear 72 via a worm gear 70 (see FIG. 4) provided on the shaft of the motor 12.
[0023]
As shown in FIG. 9A, the second gear 73 is engaged with the small gear portion of the first gear 72. The second gear 73 is provided on the rotation plate 71. The rotation plate 71 rotates about the axis of the first gear 72. The second gear 73 meshes with the large gear portion of the third gear 74. The small gear portion of the third gear 74 meshes with the large gear portion of the fourth gear 75. The small gear portion of the fourth gear 75 is provided so as to be able to mesh with a rack portion 600 a formed in the drive assisting portion 600. The large gear portion of the third gear 74 meshes with the gear 76 b in the roller gear separating mechanism 76. The gear 76b meshes with the gear 76c. The gear 76 c is provided so as to mesh with the transmission gear 56. The gear 76b is provided on the movable plate 76a. The movable plate 76a rotates about the axis of the gear 76b.
[0024]
As shown in FIG. 3A, a disc sensing lever 15 is provided on the upper surface side of the disc player main body 1. The disk detection lever 15 rotates about the shaft 15a. When the disc is further pushed in, if the disc is an 8 cm disc, it will hit the projection 15b and rotate the disc sensing lever 15 counterclockwise. If it is a 12 cm disc, it will hit the projection 15c and rotate the disc sensing lever 15 counterclockwise. Will be moved. By this rotation, the operating protrusion 15d pushes the contact portion 600b of the drive assisting portion 600.
[0025]
The drive assisting unit 600 is provided so as to be movable against a slider 6L against a spring (not shown) by a predetermined distance in the sliding direction. For this reason, when the operating projection 15d presses the contact portion 600b of the drive assisting portion 600, only the drive assisting portion 600 moves against the spring with a small force, and the rack portion 600a is moved to the fourth gear 75 (FIG. 4). (See below). When the drive assisting unit 600 is further moved by the driving force of the fourth gear 75, a part of the drive assisting unit 600 hits a part of the slider 6L and slides the slider 6L.
[0026]
A guide groove 600 c is formed in the drive assisting unit 600. In the ejected state, the first protrusion 76d formed on the movable plate 76a is located at the entrance of the guide groove 600c. In this ejected state, the second protrusion 76e formed on the movable plate 76a is engaged with the protrusion 71a formed on the rotating plate 71 (see FIG. 9A).
[0027]
(5) Transition state (related to driving force of motor 12)
As the drive assisting unit 600 moves, the first protrusion 76d is guided into the guide groove 600c as shown in FIGS. Thereby, the movable plate 76a rotates counterclockwise, and the gear 76c is separated from the transmission gear 56 (roller gear separation). Further, when the movable plate 76a rotates counterclockwise, the engagement between the second protrusion 76e and the protrusion 71a is released.
[0028]
(6) Play state (related to driving force transmission of motor 12)
As shown in FIG. 7, the rotation plate 71 released from the engagement rotates by itself due to the inertia due to the rotation of the gear 72. The gear 73 is further rotated by meshing with a dummy gear (one gear tooth), and the gear 73 meshes with the rack drive gear 18.
[0029]
The lock lever 17 is provided so as to be rotatable about a shaft 17b, and is biased counterclockwise by a torsion spring 17c. A first locking projection 17a is provided on the left side of the lock lever 17 (on the side that moves counterclockwise). The first locking projections 17a are in contact with the peripheral surface of the rotating plate 71, but as the rotating plate 71 rotates clockwise, as shown in FIG. The locking projection 17a engages with the recess 71b formed on the surface. Thereby, in a play state, the state which transmits the drive force of the motor 12 to the rack drive gear 18 is hold | maintained. Further, a second locking projection 17d is provided on the right side position of the lock lever 17 (on the side raised counterclockwise). The second locking projection 17d is detached from the recess 30a of the rack mechanism 30. Thereby, the operation of the rack mechanism 30 is allowed in the play state.
[0030]
The rack mechanism 30 is connected to the optical pickup base 32 via a universal joint 31. As shown in FIG. 7, the optical pickup base 32 slides while being guided by the two shafts 33A and 33B. The two shafts 33A and 33B are supported on the main body chassis 11 by mounting bases 34A, 34B, 34C and 34D. One end of the shaft 33A (main body chassis central side) is connected to the height adjusting mechanism 35C, and both ends of the shaft 33B are connected to the height adjusting mechanisms 35A and 35B. The posture of the optical pickup base 32 can be adjusted by adjusting the height adjustment mechanisms 35A, 35B, and 35C. Since the optical pickup base 32 and the rack mechanism 30 are connected via the universal joint 31, even if the attitude of the optical pickup base 32 changes, the attitude of the rack mechanism 30 does not change.
[0031]
When shifting from the above-mentioned play state to the eject state, the gear 72 rotates counterclockwise, thereby the rack drive gear 18 also rotates counterclockwise, and the rack mechanism 30 moves the optical pickup base 32 to the center. . Thereby, as shown in FIG. 8, the contact portion 30 b of the rack mechanism 30 presses the convex portion 17 e of the lock lever 17. For this reason, the lock lever 17 rotates clockwise, and the second locking projection 17 d engages with the recess 30 a of the rack mechanism 30. As a result, the rack mechanism 30 is fixed when shifting to the eject state. Further, when the lock lever 17 rotates in the clockwise direction, the first locking projection 17a is detached from the recess 71b. Since the gear 72 rotates counterclockwise, the rotation plate 71 rotates counterclockwise due to the inertia of the rotation of the gear 72, and the gear 73 meshes with the third gear 74 (see FIG. 4).
[0032]
As shown in FIG. 1A, the disk loading slot 20 is provided with a right disk guide 2R and a left disk guide 2L, and the disk loading slot 20 is generally T-shaped. When the 12 cm disc D1 is inserted, the disc D1 is guided to the upper surface of the disc guides 2R and 2L and is conveyed into the player main body 1 while maintaining a substantially horizontal state. The transport roller 15 is pushed slightly by the 12 cm disk D1 (same for the 8 cm disk D2), and transports the disk D1 while maintaining contact with the disk D1. On the other hand, the 8 cm disc D2 can be placed on the upper surface of the disc guide 2R · 2L in the vicinity of the diameter, but if the portion near the diameter enters the player main body, the support by the disc guide 2R · 2L is lost, and the 8cm disc Lowering of the rear end of D2 is allowed, and the front end side is directed upward.
[0033]
Projections 101b and 101b are formed on the lower surface of the upper plate of the chassis base 101 (see FIG. 1A). Further, as shown in FIG. 3, protrusions 3 d and 3 d are formed on the lower surface of the clamper 3. The front end side of the 8 cm disc D2 moving upward faces the protrusions 3d and 3d (or the protrusions 101b and 101b), and the disk D2 stops in a state where the center portion thereof is located on the disk receiving portion 4. Any one of the protrusions 101b and 101b and the protrusions 3d and 3d may be formed.
[0034]
【The invention's effect】
As described above, a stepped groove is provided in the slider, and the movement of the slider moves the conveying roller to the state retracted from the disk, and the lock lever is rotated along the groove. With the configuration, the main body chassis can be in an elastically supported state by retracting the conveyance roller.
[Brief description of the drawings]
1A and 1B are diagrams showing a disc player (a drive mechanism is omitted) according to an embodiment of the present invention, in which FIG. 1A is a plan view, FIG. 1B is a front view, and FIG. c) is a right side view.
FIG. 2A is a side view showing a play state, and FIG. 2B is a side view showing a transition state (a state just before ejection).
FIGS. 3A and 3B are diagrams showing a disc player (a drive mechanism is described) according to an embodiment of the present invention, in which FIG. 3A is a plan view, FIG. 3B is a left side view, and FIG. (C) is a right side view, and (c) is an explanatory view of the right side.
FIG. 4 is a plan view of the disc player according to the embodiment of the present invention.
FIG. 5 is a plan view of the disc player according to the embodiment of the present invention.
FIG. 6 is a plan view of the disc player according to the embodiment of the present invention.
FIG. 7 is a plan view of the disc player according to the embodiment of the present invention.
FIG. 8 is a plan view of the disc player according to the embodiment of the present invention.
9A is an explanatory diagram corresponding to FIG. 4, and FIG. 9B is an explanatory diagram corresponding to FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Player main-body part 2R Right disc guide 2L Left disc guide 3 Clamper 3a Supporting point part 3e Side convex part 5 Conveyance roller 6R Slider 6L Slider 11 Main body chassis 11c Square hole 12 Motor 17 Lock lever 20 Disc loading slot 21 Restriction plate P1 Contact guide part P2 Stopper 30 Rack mechanism 31 Universal joint 32 Optical pickup base 32b Leaf spring 36 Torsion spring 101 Chassis base

Claims (1)

Chassis base,
A transport mechanism provided in the chassis base so as to be fixed or elastically supported with respect to the chassis base, and having a roller that contacts the disk and transports the disk into the chassis base; A main unit chassis comprising a playback unit for playing back a disc, a slider, and a lock mechanism;
In a disc player with
The slider includes a first groove that engages with the transport mechanism and a second groove that engages with the lock mechanism;
When the main body chassis is in a fixed state by engagement of the lock mechanism with an engagement hole provided in the chassis base, the slider moves when the disk is transported to the reproduction position by the transport mechanism, and the slider When the transport mechanism moves along the first groove, the roller retracts from the disk, and the lock mechanism rotates along the second groove in parallel with the moving direction of the slider. A disc player configured to bring the main body chassis into an elastically supported state by being detached from the engagement hole .

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