JP4314312B2 - Disk unit - Google Patents

Description

  The present invention relates to a disk device for recording and / or reproducing a disk-shaped recording medium such as a CD or a DVD, and more particularly to a disk loading mechanism for mounting the disk-shaped recording medium.

In recent years, disk devices for recording and / or reproducing disk-shaped recording media (hereinafter abbreviated as “disks”) such as CDs and DVDs have been reduced in size and weight and used for portable or in-vehicle use. In such a disk device, the frame on which the turntable and the spindle motor are mounted has a floating structure held by viscoelastic means so that vibrations from outside the device are not directly transmitted to the turntable on which the disk is placed. It has become. In such a floating structure frame (floating frame), a disc transport driving mechanism for transporting an inserted disc to the recording / reproducing position and ejecting the disc from the recording / reproducing position, and a disc holding mechanism for fixing the disc at the recording / reproducing position. A mechanism and a disk recording / reproducing mechanism for recording / reproducing the disk at the recording / reproducing position are provided (for example, see Patent Document 1).
JP 07-272417 A (page 4-6, FIG. 3)

In a conventional disk device, each mechanism inside the device starts operation when a disk is inserted. Therefore, a disk insertion detecting means is provided for detecting that a disk has been inserted. In the conventional disk device, the disk insertion detecting means and the electric circuit board for controlling each mechanism are provided on the fixed side frame fixed to the casing which is the appearance of the disk device. Therefore, the disk inserted into the floating frame inside the disk device is detected by the disk insertion detecting means provided on the fixed frame, and the disk detection information is input as a signal to the electric circuit of the electric circuit board. there were. As a result, in the conventional disk device, in order to arrange and operate the disk insertion detecting means, it is necessary to secure a space in both the fixed frame and the floating frame, and the number of parts is large, so the disk insertion detection The means has been an obstacle in reducing the size and thickness of the disk device.
An object of the present invention is to provide a compact and thin disk device by miniaturizing a disk insertion detecting means which has been an obstacle to the miniaturization and thinning of a conventional disk device.

  The disc device according to the present invention has a fixed frame serving as a fixed portion, and a function of recording and / or reproducing a disc-shaped recording medium inserted in the fixed frame via an elastic member on the fixed frame. A floating unit having a disc transporting means for transporting the disc-shaped recording medium inserted from a disc insertion / ejection port formed in a fixed frame, and sandwiching the disc-shaped recording medium at a recording / reproducing position. Disc holding means for attaching, disk recording / reproducing driving means for rotating the disk-shaped recording medium to perform recording / reproducing, disk conveying means, disk holding means, and disk recording / reproducing driving means. An electric circuit board having an electric circuit for driving control and a surface forming a disk insertion / ejection port are arranged. Rotated in a direction to be pressed down by the outer edge of the inserted the disc-shaped recording medium, comprising a, a disk insertion detection lever to directly drive a switch which outputs a disk detection signal to the electrical circuit. In the disk device configured as described above, the disk insertion detecting lever for reliably detecting the inserted disk can be configured to be small, and the entire apparatus can be reduced in size and thickness.

  In the disk apparatus according to the present invention, the disk insertion detection lever is disposed in the vicinity of both sides of the disk insertion / ejection opening, spreads on both sides and slightly lifts at both ends, and the switch on the electric circuit board is pressed by rotation. You may comprise so that it may have a processus | protrusion to perform. With this configuration, the disc apparatus of the present invention can reliably detect the insertion state of the disc-shaped recording medium.

  The disc device according to the present invention further includes an eject detection lever disposed in the vicinity of the disc insertion detection lever, and is pressed and rotated by the outer edge of the disc-shaped recording medium to detect the disc ejection operation in the electric circuit. May be configured to output. With this configuration, the disk device of the present invention can reliably detect the insertion state of the disk-shaped recording medium and can detect the ejection state of the disk-shaped recording medium.

  According to the present invention, a disk detection lever that provides a floating unit that is viscoelastically held in a stationary frame fixed to a housing that forms the appearance of the apparatus, and that reliably detects an inserted disk in the floating unit. Further, by providing an electric circuit for driving and controlling each function for recording / reproducing the disc, it is possible to reduce the size of the disc insertion detecting means, and to provide a small and thin disc device.

  Preferred embodiments of a disk device according to the present invention will be described below with reference to the accompanying drawings.

Embodiment 1
FIG. 1 is a perspective view showing a state in which a housing which is an appearance in the disk device of Embodiment 1 is removed. FIG. 2 is a perspective view showing a state in which a disc as a disc-shaped recording medium is inserted into the disc apparatus shown in FIG. FIG. 3 is an exploded perspective view showing the internal configuration of the disk apparatus shown in FIG.
The disk device according to the first embodiment shown in FIGS. 1 to 3 has a function of recording and reproducing a disk 101 which is a disk-shaped recording medium, for example, a CD, a DVD, etc. The disc 101 is recorded or played back.

  The disk device of the first embodiment has an upper frame 1 and a lower frame 9 fixed to a casing that is an external appearance, and a plurality of damper springs 90 (FIG. 3) that are viscoelastic bodies are provided therein. An elastically supported floating unit 10 is provided.

As shown in FIG. 3, the floating unit 10 has a clamper unit 3 that clamps an inserted disc 101 by a turntable 70, a disc transport unit 4 that transports the inserted disc 101, and driving of the disc transport unit 4. A disk transport drive unit 5 having a source, a traverse chassis 6 in which the disk 101 is arranged at a recording / reproduction position, a disk recording / reproduction drive unit 7 for rotating the disk 101 to record or reproduce data, and a traverse chassis 6 A printed circuit board 8 having an electric circuit that drives and controls each mechanism in the floating unit 10 is provided on the back surface (the surface opposite to the disk mounting surface).
The floating unit 10 configured as described above is held in a viscoelastic floating state by a plurality of damper springs 90 provided on each of the upper frame 1 and the lower frame 9.

  FIG. 4 is an exploded perspective view showing the upper frame 1. As shown in FIG. 4, a disk guide 2 is suspended from the back surface of the upper frame 1 so as to be rotatable at two locations. The two protrusions 2a and 2a of the disk guide 2 are engaged with engagement holes 1a and 1a formed in the upper frame 1, respectively, and the disk guide 2 is centered on the engagement portion with respect to the upper frame 1 and the front surface of the apparatus. The side is configured to rotate a predetermined angle.

FIG. 5 is a perspective view showing the clamper unit 3. As shown in FIG. 5, the clamper unit 3 includes a clamper 30 that presses the inserted disc 101, a clamper holding unit 31 that holds the clamper 30 movably, and the clamper holding unit 31 via a clamper arm 32. 6 and a clamper base 33 fixed to 6. The clamper arm 32 that mechanically connects the clamper base 33 and the clamper holding portion 31 is made of an elastic member, for example, a thin metal plate, and restricts the pressing force when the disc is clamped by the clamper 30. The clamper 30 is held in a rotatable engagement state by a clamper holding portion 31.
The clamper unit 3 configured as described above is disposed above the turntable 70, that is, at a position away from the turntable 70 when the disk 101 is inserted and conveyed, and is in contact with the upper frame 1. Yes. The clamper unit 3 has a clamper base 33 fixed to the traverse chassis 6 of the floating unit 10 and a biasing means (not shown) provided on the shaft, for example, a spring, a crank mechanism, or a cam mechanism. Always energized in the direction of. However, when the disk 101 is not in the recording / reproducing position, the clamper 30 is disposed at a position where the clamper 30 contacts the upper frame 1 by the locking means and is separated from the turntable 70. When the disc 101 is inserted and transported to a position (recording / reproducing position) on the turntable 70, the locking means is released, and the clamper 30 holds the disc 101 between the spring biasing force, the crank mechanism and the cam mechanism. Then, the turntable 70 is pressed.

FIG. 6 is a perspective view showing the disk transport unit 4, the disk transport drive unit 5, and the traverse chassis 6 of the floating unit 10 in the disk device of the first embodiment.
The disc transport unit 4 has a roller arm 40 having a transport roller 40a that transports the disc 101 inserted into the disc insertion / eject port 11 against the disc guide 2 and rotates in a predetermined locus by rotating. The conveying roller 40a of the roller arm 40 is pressed against the disk guide 2 by the biasing force of the spring when the disk 101 is not in the recording / reproducing position, and when the disk 101 is completed and reaches the recording / reproducing position, The conveying roller 40a of the roller arm 40 is configured to move downward (in a direction away from the disc guide 2).

  In the disk device of the first embodiment, the direction of the rotation axis of the transport roller 40a is inclined at a predetermined angle with respect to the front surface of the disk device where the disk insertion / extraction port 11 is located. This is because the movement trajectory of insertion and ejection of the disk 101 in the traverse chassis 6 is perpendicular to a line parallel to the disk insertion / ejection port 11 of the disk apparatus, that is, straight when viewed from the upper surface of the apparatus. This is because the disc 101 needs to be transported obliquely because it is not configured to move. Therefore, the inserted disc 101 is configured to be conveyed obliquely with respect to the front surface of the apparatus having the disc insertion / ejection port 11. In the traverse chassis 6 according to the first embodiment, the motor 50 of the disc transport drive unit 5 is disposed in the vicinity of the disc insertion / ejection port 11 on the front surface of the traverse chassis 6, and the recording / reproducing position is located on the back side of the motor 50. A part of is arranged. For this reason, in the first embodiment, the disc 101 is transported obliquely from the disc insertion / ejection port 11.

The disk transport drive unit 5 shown in FIG. 6 includes a motor 50 that rotationally drives the transport roller 40a of the roller arm 40 during disk transport (disk loading), and before disk insertion and when disk ejection is complete (disk unloading). A control slider 51 for fixing the traverse chassis 6 to the upper frame 1, a trigger lever 52 for detecting the arrival of the recording / reproducing position of the disk 101 after completion of the disk conveyance, and a gear for transmitting the rotation of the motor 50 to the control slider 51 and the like. Row 53. In FIG. 6, the trigger lever 52 is disposed at the rear position in the traverse chassis 6, but one end of the trigger lever 52 is configured to contact the rear end of the control slider 51, and the trigger lever The control slider 51 is configured to be interlocked with the movement of 52. The other end of the trigger lever 52 in the traverse chassis 6 is disposed at a position where it contacts the edge of the disc 101 when the disc 101 reaches above the recording / reproducing position.
A disc recording / reproducing drive unit 7 and a printed circuit board 8 are attached to the rear surface of the traverse chassis 6 on which the disc transport unit 4 and the disc transport drive unit 5 configured as described above are mounted.

In the front of the traverse chassis 6, it is disposed in the vicinity of the disk insertion / ejection port 11, and is disposed behind the disk insertion detection lever 41 and a disk insertion detection lever 41 for detecting that the disk 101 is inserted into the apparatus, An eject detection lever 42 for detecting the ejection state of the disk 101 is provided. The disc insertion detection lever 41 and the eject detection lever 42 are always urged upward by the urging force of the spring, and are arranged at a predetermined upper position when the disc 101 is not inserted.
As shown in FIG. 6, the disc insertion detection lever 41 is disposed in the vicinity of both sides of the disc insertion / ejection port 11 and has a blade shape that spreads on both sides and slightly lifted at both ends. When the disc 101 is inserted from the disc insertion / eject port 11, the outer edge portion of the disc 101 pushes and expands either one of the disc insertion detection levers 41 arranged on both sides or the respective detection surfaces (upper surface in FIG. 6) 41a. The protrusion 41b formed on the disc insertion detection lever 41 presses the detection switch 81 that is a mechanical switch. When the detection switch 81 is pressed, the rotation of the transport roller 40a is started, and the disk 101 inserted by the rotation is transported to a desired position in the traverse chassis 6.

  FIG. 7 is an exploded perspective view showing the disk recording / reproducing drive unit 7, the printed circuit board 8, and the lower frame 9. The lower frame 9 holds the floating unit 10 having the traverse chassis 6 and the like with a damper spring 90. As shown in FIG. 7, the disk recording / reproducing drive unit 7 has a turntable 70 on which the disk 101 is placed and rotationally driven, a spindle motor 71 that rotates the turntable 70, and an optical pick unit 72 that records and reproduces the disk 101. , And an optical pick drive motor 73 that drives the optical pick portion 72 in the radial direction of the disk 101. The printed circuit board 8 is attached to the back surface of the traverse chassis 6, and an electric circuit for driving and controlling each mechanism provided in the traverse chassis 6 is mounted.

The traverse chassis 6 configured as described above is held by a damper spring 90 having a viscoelastic function by a lower frame 9 which is a fixed side frame attached to a casing that is the appearance of the apparatus. In the state before the disk is inserted, the traverse chassis 6 is in the lower position inside the frame by the upper frame 1 and the lower frame 9 by the pressing operation of the control slider 51 and the roller arm 40 to the disk guide 2. In this state, when the disc 101 is inserted, the disc 101 enters between the conveyance roller 40a of the roller arm 40 and the disc guide 2 and is conveyed to the recording / reproducing position. When the disk 101 reaches the recording / reproducing position, the traverse chassis 6 enters a floating state and rises, and the disk 101 is clamped by the turntable 70 and the clamper 30.
Next, in the ejecting operation of the disk 101, the damper spring 90 is compressed by the pressing operation of the roller arm 40 against the disk guide 2 and the control slider 51, and the traverse chassis 6 is lowered to the lower position inside the fixed frame. Become.

Next, the disk insertion detection lever 41 provided in the floating unit 10 in the disk apparatus of Embodiment 1 will be described in detail.
FIG. 8 is a front view showing the front side of the upper frame 1, the floating unit 10 and the lower frame 9 in the first embodiment, that is, the disk insertion / ejection port side. The floating unit 10 and the lower frame 9 are viscoelastic. A damper spring 90 is connected between the floating unit 10 and the lower frame 9. The damper spring 90 is configured by a spiral spring 90a and a damper 90b formed of an insulating material. The damper 90b is made of rubber, for example, and is provided to improve vibration resistance.

  As shown in FIG. 8, the disc insertion detection levers 41 are disposed on both sides of the front side of the floating unit 10 in the vicinity of the disc insertion / discharge port. Each of the disk insertion detection levers 41 has a rotation center shaft 41b inside the apparatus, and a detection part 41c extending toward the outside of the apparatus extends outward and has a blade shape with its ends slightly raised. Yes. The upper surface which is the surface facing the disk 101 of the detection unit 41c is a detection surface 41a. A protrusion 41d is formed on the opposite side of the rotation center axis 41b with respect to the detection unit 41c. The protrusion 41d is disposed at a predetermined distance from a detection switch 81, which is a mechanical switch on the printed circuit board 8 disposed on the back surface of the traverse chassis 6 of the floating unit 10, and is surely moved by the movement of the protrusion 41d. The detection switch 81 is configured to operate.

  FIG. 9 is a front view showing a state in which the disk 101 is mounted on the upper frame 1, the floating unit 10, and the lower frame 9 in the first embodiment shown in FIG. FIG. 10 is an enlarged front view showing the operation of the disk insertion detection lever 41 in the first embodiment. In FIG. 10, the disc insertion detection lever 41 is indicated by parallel oblique lines. In FIG. 10, (a) shows the left disc insertion detection lever 41 as seen from the front of the disc device when no disc is loaded, and (b) shows from the front of the disc device when no disc is loaded. The right disc insertion detection lever 41 is shown. FIG. 10C shows the disc insertion detection lever 41 on the left side as viewed from the front of the disc device when a disc is loaded, and FIG. 10D shows the right side as viewed from the front of the disc device when a disc is loaded. The disc insertion detection lever 41 is shown.

  As shown in FIGS. 9 and 10 (c) and 10 (d), when the disc 101 is inserted from the disc insertion / eject port 11, the disc insertion detection lever in which the outer edge portions of the disc 101 are arranged on both sides. 41 is inclined to spread the detection surface 41a (upper surface in FIG. 6). At this time, both sides of the blade-shaped detection unit 41c are always lifted so that the detection surface 41a does not contact the recording surface of the disk 101. Thus, when the detection part 41c rotates, each protrusion 41d provided via the rotation center axis | shaft 41b presses the detection switch 81, and makes it an ON state. When the detection switch 81 is turned on, a disk insertion detection signal is input to the electric circuit of the printed circuit board 8, and each mechanism provided in the floating unit 10 is driven.

Next, the operation of the disk device according to the first embodiment configured as described above will be described.
When the disk 101 is inserted into the disk apparatus of the first embodiment from the disk insertion / ejection port 11, the disk insertion detection lever 41 is pushed down by the disk 101 and the insertion of the disk 101 is detected. When the insertion of the disk 101 is detected, the roller arm 40 rotates and presses the disk 101 against the disk guide 2 of the upper frame 1. As a result, the disc 101 is conveyed to a disc recording / reproducing position inside the disc apparatus. At this time, the control slider 51 in the disk transport driving unit 5 is in contact with the upper frame 1, and the traverse unit 6 is in a fixed state.

  In the disk device according to the first embodiment, the roller arm 40 is mounted obliquely with respect to the disk insertion / ejection port 11, that is, the front surface of the device, so that the disk 101 is conveyed obliquely with respect to the front surface of the device. As shown in FIG. 6, a motor 50 is disposed at a position on the left side of the disk insertion / extraction port 11 toward the apparatus, and a part of the disk recording / reproducing position is disposed at the back of the motor 50. It is because it has been. As described above, in the disk device of the first embodiment, each mechanism in the traverse chassis 6 is organically arranged and efficiently arranged so as not to cause a dead space.

  When the disc 101 reaches the disc recording / reproducing position, the trigger lever 52 and the disc 101 come into contact with each other, and the rotation of the roller arm 40 is stopped by a series of operations of the control slider 51 and the like thereafter. Descend to the side. By the downward movement of the roller arm 40 downward from the disk recording / reproducing surface, the disk guide 2 that is in contact with the roller arm 40 via the disk 101 also performs the downward movement. In this lowering operation of the disk guide 2, the disk guide 2 is suspended from the upper frame 1 at two engagement positions, and therefore rotates around the engagement position to the front side of the traverse chassis 6. It contacts the formed chin guard 61. As the disk guide 2 rotates and contacts the chin guard 61 in this way, a part of the disk insertion / discharge port 11 is blocked and further insertion of the disk 101 is prohibited. The chin guard 61 formed on the front side of the traverse chassis 6 is a frame that forms the lower side of the disk insertion / extraction port 11, and is formed so as to be curved and protrude so that the disk is stored on the front side of the apparatus. .

Further, when the trigger lever 52 of the disk transport driving unit 5 comes into contact with the disk 101, the control slider 51 moves in the direction opposite to that when the disk is inserted. When the control slider 51 moves in this manner, the contact state between the control slider 51 and the upper frame 1 is released, and the traverse unit 6 is viscoelastically instructed by the damper spring 90, that is, the floating unit 10 is in a floating state. It becomes a state. In this floating state, the clamper 30 of the clamper unit 3 is pushed down, and the disc 101 at the disc recording / reproducing position is clamped between the clamper 30 and the turntable 70. By this clamping operation, the floating unit 10 moves slightly toward the lower frame 9, that is, downward.
When the disc 101 is completely clamped between the clamper 30 and the turntable 70 as described above, the disc 101 rotates and the optical pick section 72 moves to record or reproduce the disc 101.

  When the recording or reproducing operation with respect to the disk 101 is completed and, for example, a disk ejection command is input from the outside of the apparatus, the roller arm 40 is lifted to press the disk 101 against the disk guide 2 of the upper frame 1. At this time, the control slider 51 of the disk transport driving unit 5 moves, the control slider 51 and the upper frame 1 come into contact with each other, and the movement of the traverse unit 6 is limited. At this time, since the disc guide 2 is lifted, the disc insertion / ejection port 11 is opened.

In the above state, the roller arm 40 rotates to eject the disc 101 from the disc insertion / ejection port 11. The ejection state of the disk 101 is detected by an eject detection lever 42 provided in the traverse chassis 6. The eject detection lever 42 has a blade shape with its end side slightly raised, like the disc insertion detection lever 41 disposed in the vicinity of both sides of the disc insertion / discharge port 11. When the disc 101 is ejected from the disc insertion / ejection port 11, the outer edge portion of the disc 101 pushes down the detection surface (upper surface in FIG. 6) 42 a of the eject detection lever 42, and the disc 101 is assumed from the disc insertion / ejection port 11. When the ejecting lever 42 is ejected, the end of the eject detecting lever 42 is lifted, and it is detected that the ejecting operation of the disc 101 is completed. As described above, the rotation of the roller arm 40 is stopped when the ejection operation of the disk 101 is completed. Thereafter, when the disk 101 is completely ejected, the roller arm 40 is moved upward by the force of the spring and is locked to the disk guide 2 and the lower frame 9. Then, the disc 101 ejection operation is completed.
In the above embodiment, the disk device capable of recording and reproduction has been described. However, the present invention is not limited to such a device, and a recording device or a reproducing device for a disk-shaped recording medium, etc. The present invention can also be applied to a disk device.

  INDUSTRIAL APPLICABILITY The present invention is particularly useful for a small disk device that records or reproduces a disk-shaped recording medium such as a CD or DVD, and can provide a thin disk device that can reliably detect a disk inserted in the device.

It is a perspective view which shows the state which removed the external appearance housing | casing in the disk apparatus of Embodiment 1 which concerns on this invention. FIG. 2 is a perspective view illustrating a state in which a disk-shaped recording medium is being inserted into the disk device illustrated in FIG. 1. FIG. 2 is an exploded perspective view showing an internal configuration of the disk device shown in FIG. 1. 3 is an exploded perspective view showing an upper frame 1 in Embodiment 1. FIG. 3 is a perspective view showing a clamper unit 3 in Embodiment 1. FIG. 2 is a perspective view showing a disk transport unit 4, a disk transport drive unit 5, and a traverse chassis 6 of the floating unit 10 in the disk device of Embodiment 1. FIG. 3 is an exploded perspective view showing a lower frame 90 that holds a disk recording / reproduction drive unit 7, a printed circuit board 8, and a traverse chassis 6 with a damper spring 90 in the disk device of Embodiment 1. FIG. 3 is a front view showing each of an upper frame 1, a floating unit 10, and a front side of a lower frame in the first embodiment. FIG. FIG. 9 is a front view showing a state in which a disk 101 is mounted on the upper frame 1, the floating unit 10, and the lower frame 9 in the first embodiment shown in FIG. FIG. 6 is an enlarged front view showing the operation of the disc insertion detection lever 41 in the first embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper frame 2 Disc guide 3 Clamper part 4 Disc conveyance part 5 Disc conveyance drive part 6 Traverse chassis 7 Disc recording / reproduction drive part 8 Printed circuit board 9 Lower frame 10 Floating unit 11 Disc insertion discharge port 40 Roller arm 41 Disc insertion detection lever 41a Detection surface 41b Rotation center axis 41c Detection part 42 Eject detection lever 81 Detection switch 61 Chin guard 101 Disc

Claims (3)

A fixed frame that serves as a fixed portion; and a floating unit that is disposed inside the fixed frame via an elastic member on the fixed frame and has a function of recording and / or reproducing the inserted disk-shaped recording medium,
A disc transport means for transporting the disc-shaped recording medium inserted from a disc insertion / ejection port formed in the fixed frame by the floating unit;
Disc clamping means for clamping the disc-shaped recording medium at a recording / reproducing position;
Disc recording / reproducing driving means for performing recording / reproducing by rotating the disc-shaped recording medium;
An electric circuit board having an electric circuit for driving and controlling the disk conveying means, the disk clamping means, and the disk recording / reproducing driving means;
A disc that is disposed on a surface that forms a disc insertion / ejection port and rotates in a direction pushed down by an outer edge of the inserted disc-shaped recording medium, and directly drives a switch that outputs a disc detection signal to the electric circuit. An insertion detection lever;
A disk device comprising:   The disc insertion detection lever is disposed in the vicinity of both sides of the disc insertion / ejection port, and has a blade-shaped portion that spreads out on both sides and slightly lifted at both ends, and a protrusion that presses the switch of the electric circuit board by turning. The disk device according to claim 1.   The eject detection lever is disposed in the vicinity of the disc insertion detection lever, and is rotated by being pressed by the outer edge of the disc-shaped recording medium to output a signal for detecting the disc ejection operation to the electric circuit. 3. The disk device according to 1 or 2.

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