JP2874557B2 - Disc player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front-loading carousel type, and more particularly to a C type capable of exchanging a CD during a performance.
The present invention relates to a disc player such as a D changer.

[0002]

2. Description of the Related Art Conventionally, disc players of this kind have a motor for a reciprocating linear mechanism of a tray and a motor for a rotating mechanism for rotating an optical pickup (recording / reading device) to a predetermined reproducing position. Also, there is known a device that switches between a reciprocating linear movement mechanism of a disk table and a rotation mechanism for rotating an optical pickup to a predetermined reproduction position by using a gear or a clutch mechanism.

In a playing state (during data reading) of a CD (compact disk), when the disk table is in a position protruding from the inside of the housing (referred to as an open position) during the reciprocating linear movement of the disk table, the conventional apparatus is used. Is provided with a locking member such as a reciprocating linear motion restricting lever or gear that is interlocked with the reciprocating linear motion mechanism, or a worm gear is installed and the disc table is erroneously pushed into the housing by hand or the like, resulting in a disc or optical pickup. The movement in the insertion direction is regulated so as not to cause an accident of damaging the device (see Japanese Utility Model Laid-Open No. 5-90638).

[0004]

However, the above-mentioned disc player has a loading mechanism for linearly reciprocating the tray and a rotating mechanism for moving the optical pickup to the target reproduction position, and uses a gear train or a clutch mechanism. Since the reciprocating motion and the rotating motion are switched, there has been a problem that the configuration is complicated and the size is increased.

When the tray is in the open position (disc loading position), a regulating lever, a gear or a worm gear for regulating the pushing by hand or the like is provided in the casing of the tray, so that the structure is also complicated. There was a problem. Further, in the case of using the worm gear, since the tooth surface of the worm gear is in point contact, there is a problem that the bite may occur and the operation becomes unstable due to this.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and has as its object a simple structure, a plurality of operations can be performed by a single motor, and a method for inserting data into a tray while data is being read from a disk. An object of the present invention is to provide a disc player that can prevent erroneous operations.

[0007]

In order to solve the above-mentioned problems, a disk player according to the present invention is caused to reciprocate linearly.
Move the loading mechanism and read / write device to the target playback position.
Drive base that can rotate with a rotating mechanism for moving
To the drive base via a transmission member and rotate the drive base.
Linear reciprocation of tray and record reading by driving motor
The disc player is used to rotate the
A shaft on the drive base, and drive the motor to this shaft.
The gear that transmits power is fitted, and the shaft is guided directly to the tray.
A substantially U-shaped groove composed of a linear portion and a U-shaped portion and this groove
A gear rack is formed in parallel with the gear rack.
And the shaft is positioned in the U-shaped part during the operation of the rotation mechanism.
To lock the tray and stop the recording / reading device.
During operation, the tray is opened by positioning the shaft in the linear part.
・ It can be closed and the disk data can be read.
When the tray is being pulled out of the housing during ejection,
Formed on the tray with stopper ribs formed on the drive base
Locks the tray ribs
To prevent insertion into the housing.
You.

[0008]

The disc player according to the present invention performs linear reciprocating movement of the tray and rotation of the recording / reading device by means of a motor for rotating and driving the drive base, and moves the tray in and out and moves the recording / reading device up and down. Also when the tray is in an open position in a CD playing state, drive
The tray formed on the tray with the stopper rib formed on the base
Locks the ribs and keeps the tray
Prevent insertion into

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view of a tray of a disc player according to the present invention, with a part thereof being cut away. The disk player 1 includes a disk table 2, a tray 3, a fixed base 4, an elevator base 5, a motor 6, a drive base 7, and a cam (transmission member) 8 in a housing.

The disk table 2 has a substantially disk shape, and circular disk mounting portions 2a for accommodating the disks 9 are provided as concave portions at a plurality of positions (for example, five positions). Notches 2g provided in the center of the rear surface of the disk table 2 and extending in the direction of the support shaft 2f are formed in the disk mounting portions 2a. The rotation and position of the disk table 2 are controlled clockwise and counterclockwise by a speed reduction mechanism and a rotation position control switch (both not shown) attached to the tray 3.

The tray 3 has a bearing 3a in which the shaft 2f fits at the center of a concave portion having a size corresponding to the diameter of the disk table 2. The disk table 2 is rotated about the bearing 3a. It is freely supported.

FIG. 2 is provided on the back surface of the tray 3.
It is an enlarged view of the gear racks of the gear racks 3b to 3h that constitute a loading mechanism that performs a reciprocating linear movement. Inside the gear racks 3b to 3h, grooves (linear portions) 3 are provided in parallel.
Substantially U-shaped composed of i, 3m and groove (U-shaped part) 3k
With grooves 3i~3n is provided, the gear rack 3d
Is formed on a concentric circle centered on the rotation center of the drive base 7. Reference numeral 3p denotes a tray rib formed in parallel with the grooves 3i and 3m, and the gear racks 3b to 3p.
h.

FIG. 3 is an enlarged view of a main part of FIG. The elevator base 5, the motor 6, the drive base 7 and the cam 8 are attached to the fixed base 4, and the cam 8, the drive base 7 is stopped, and the position detecting switches 10 to 10 detect the limit of opening the tray 3. 12 are attached.

The shafts 13a and 13b formed on the upper surface of the fixed base 4 are inserted into long holes 14a and 14b formed in the longitudinal direction of the cam 8 having a rectangular shape. It is slidable. A notch rack 15 (transmission member) is formed on one side of the cam 8, and a groove 8a for inserting a pin 5c as a follower provided on one side of an elevator base 5 described later is formed on the other side. It is formed diagonally.

An optical pickup (recording / reading device) 17 for reading data recorded on a CD is mounted on the elevator base 5, and pins 5a and 5b are provided at both ends on the other side opposite to the pins 5c. Provided. These pins 5a and 5b are rotatably attached to the fixed base 4, and when the cam 8 slides in the longitudinal direction, the pin 5c is inserted into the groove 8a in synchronization with the sliding of the cam 8. The swing arm type rotating mechanism moves along and the elevator base 5 rotates about the pins 5a and 5b.

At this time, the sliding direction of the cam 8 is the Y axis,
The axis on the paper plane perpendicular to the Y axis is defined as the X axis, and the axis passing through the paper plane perpendicular to the X axis and the Y axis is assumed to be the Z axis (hereinafter the same applies to FIGS. 5 to 8). The specific operation is as follows.

That is, when the cam 8 slides upward on the Y axis (referred to as upward movement), the elevator base 5
Moves on the axis from the front side to the back side of the paper (referred to as descent),
Conversely, when the cam 8 slides downward on the Y axis (referred to as downward movement), the elevator base 5 moves on the Z axis from the back side of the paper surface to the front side (referred to ascending).

The drive base 7 has a circular shape, and a notch gear 16 (transmission member) is provided on the circumference of the drive base so as to mesh with the notch rack 15 so as to be rotatable about a shaft 7a. A stopper rib 7b having a height that can be brought into contact with the gear rack 3p that constitutes a lock mechanism is provided on a circumferential portion that is supported and is separated from the notch gear 16 by a predetermined distance.
Is provided. The notch rack 15 and the notch gear 1
The combination with 6 can be substituted by a link mechanism.

The drive base 7 is driven by a motor 6, and a pulley 18 is mounted on a drive shaft 6a of the motor 6.
And a belt 20 is stretched between the pulley 18 and a pulley 19 provided on the shaft 7a. A gear 21 is provided coaxially with the pulley 19.
The gear 21 is a lower large-diameter gear 22a of the gears 22a and 22b formed in two upper and lower stages adjacent to the gear 21.
The upper small-diameter gear meshes with the lower large-diameter gear 24a of the upper and lower two-stage gears 24a and 24b coaxially and rotatably mounted on the shaft 23 fitted in the grooves 3i to 3o. The upper gear (drive gear) 24b further meshes with the gear racks 3b to 3h (the gear rack 3b in FIG. 3) (see FIG. 4).

The gears 21, 22a, 22b, 24a,
The driving force of the motor 6 is reduced by the transmission member 24b and transmitted to the gear racks 3b to 3h at an accurate timing, and the movement of the shaft 23 causes the tray 3 to operate accurately in the direction of the arrow AB (open / close operation). Can be done.

Next, the operation of the above embodiment will be described.
FIG. 5 is an open / close operation diagram of the tray when the elevator base is raised.

That is, FIG. 5 shows a state in which the gear 24b meshes with the gear rack 3f and the elevator base 5 rises. In this state, if the motor 6 is rotated clockwise, the shaft 23 rotates the gear 24b. As a result, the inside of the groove 3m relatively moves in the direction of arrow A, and the tray 3 performs a closing operation. When the motor 6 is rotated counterclockwise, the shaft 23 relatively moves in the direction of arrow B in the groove 3m with the rotation of the gear 24b, and the tray 3 performs an open operation. In the case of FIG. 3, the opening and closing operations of the tray 3 may be performed by reversing the rotation direction of the motor 6 from the case of FIG.

FIG. 6 shows a state where the gear 24b is engaged with the gear rack 3d. At this time, the notch rack 15 and the notch gear 16 are engaged with each other. This shows that the mounted optical pickup 17 rises in synchronization with the downward movement of the cam 8.

FIG. 7 shows a state in which the gear 24b is engaged with the gear rack 3d, as in FIG.
Since the gear 5 and the notch gear 16 are meshed with each other, if the motor 6 is rotated in the counterclockwise direction, the optical pickup 17 mounted on the elevator base 5 descends in synchronization with the upward movement of the cam 8. I have.

At this time, as described above, since the gear rack 3d of the tray 3 is concentric so that the rotation center of the drive base 7 is the same, the tray 3 is substantially locked and the tray 3 is opened and closed. (Reciprocating linear operation) is not performed.

Further, when the motor 6 is rotated from the state shown in FIG. 6 or FIG. 7 and the gear 24b comes into mesh with the gear racks 3e to 3h or 3c to 3b (see FIG. 2), the notch gear 16 of the drive base 7 is formed. Is disengaged from the notch rack 15 of the cam 8, the cam 8 is stopped, and the elevator base 5 does not move up and down.
Only the open / close operation of the tray 3 is performed.
When the gear 24b is rotated in the reverse direction from this state, the notch gear and the notch rack come into meshing with each other again, contrary to the above.

FIG. 8 is a diagram showing the completion of the tray opening operation in a state where the elevator base 5 is in an up state in which the gear 24b is engaged with the gear rack 3h. When the opening operation of the tray 3 is completed in the state where the elevator base 5 is moved up with the cam 8 lowered in this way, the drive base 7 wraps around to a position where the stopper rib 7b overlaps the tray rib 3p in the direction of the arrow AB, The locked state is reached in which the stopper rib 7b and the tray rib 3p are in contact.

For this reason, the tray 3 cannot be moved in the direction of arrow B. The tray 3 drives the motor 6 to rotate the drive base 7, and the stopper rib 7b and the tray rib 3p move in the direction of arrow AB. The lock state cannot be released and cannot be closed except for turning around to a position that does not oppose.

With this configuration, even when a disc is exchanged during a performance, if the disc table 2 is not at the correct position, the tray 3 cannot be manually inserted into the housing, and the disc or the optical pickup during the performance cannot be inserted. Damage can be prevented beforehand.

[0030]

According to the present invention, a loading mechanism for linearly reciprocating and a rotating mechanism for moving an optical pickup to a reproduction target position are connected to a rotatable drive base via a transmission member such as a gear and a cam. However, since a plurality of operations such as a linear reciprocating motion of the disk table and a rotation of the optical pickup are performed by a motor that drives and drives the drive base, a drive mechanism for each mechanism and a clutch mechanism for switching the mechanisms are not required. It can be simplified and the disk player can be downsized.

When the tray is pulled out of the housing in the playing state, the drive base is used except for driving the motor.
Tray rib formed on the tray with the stopper rib formed on the tray
Lock the tray and insert the tray into the housing except for driving the motor.
Since the insertion is prevented, it is possible to prevent a trouble such as damage to the disk or the device by a simple mechanism.

[Brief description of the drawings]

FIG. 1 is a plan view showing a tray of a disc player according to the present invention with a part thereof cut away.

FIG. 2 is an enlarged view of a gear rack.

FIG. 3 is an enlarged view of a main part of the disc player according to the present invention.

FIG. 4 is a sectional view taken along line CC of FIG. 3;

FIG. 5 is an open / close operation diagram of the tray when the elevator base is raised.

FIG. 6 is an elevation operation diagram of the elevator base (elevation completed state)

FIG. 7 is a diagram showing a lowering operation of the elevator base (a lowering completed state).

FIG. 8 is a diagram showing the completion of the tray opening operation when the elevator base is raised.

[Explanation of symbols]

1 ... Disc player, 2 ... Disk table, 3b ~
3h: gear rack, 3i, 3m: groove (linear portion), 3k
... groove (U-shaped part), 3p ... tray rib, 5 ... elevator base, 6 ... motor, 7 ... drive base, 7b ... strike
Pari rib , 17 ... optical pickup (recording / reading device).

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Naoki Shibuya 3--12 Moriyacho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture Inside of Victor Company of Japan, Ltd. (56) References JP-A-5-182341 (JP, A) (58) Field surveyed (Int.Cl. ⁶ , DB name) G11B 17/24

Claims (1)

(57) [Claims] A disc table on which a plurality of discs are mounted on the same circumference; a tray rotatably supporting the disc table; and a tray irrespective of whether data on the disc is being read or not. Loading mechanism for reciprocating linear movement between a disk loading position and a playback position, a loading mechanism for rotating a playback target disk placed on the disk table to a playback position, and a recording and reading device for reading data from the disk In a disc player having a rotating mechanism for moving the recording and reading device to the reproduction target position, a loading mechanism for performing the reciprocating linear movement and a rotating mechanism for moving the recording / reading device to the reproduction target position are rotatable. The drive base is connected to the drive base via a transmission member, and is driven by a motor that rotationally drives the drive base. Ru was performed and the rotation of the linear reciprocating motion and the recording reading device Lee
A disc player, wherein a shaft is provided on the drive base, and the motor is mounted on the shaft.
Gear that transmits the driving force of the
U-shape composed of straight and U-shaped parts for guiding
And a gear rack formed in parallel with this groove.
The gear is fitted to a rack, and the shaft is positioned at the U-shaped portion during the operation of the rotating mechanism,
Put the tray in the locked state and stop the recording / reading device.
During operation, the shaft is positioned on the linear part and the tray is
Can be opened and closed , and the tray is pulled out of the chassis while the data on the disk is being read
The drive base,
Lock the tray rib formed on the tray with the topper rib
And, a disk player other than the driving of the motor is characterized in that so as to prevent the insertion into the housing of the tray.