JPH07334911A - Disk player - Google Patents

Abstract

PURPOSE:To provide a simply structured disk player capable of performing a plurality of operations by using a single motor and preventing an erroneous operation at the time of inserting a tray during reading of disk data. CONSTITUTION:A drive base 7 is connected to the loading mechanism of a disk table 2 and the rotational mechanism of an optical pickup by using a gear and a cam, the drive base 7 is driven by means of a single motor 6 and a locking mechanism is provided in the drive base 7. When the disk table 2 (tray 3) is pulled out of a easing, the locking mechanism is made not able to be released by means other than driving of the motor 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front-loading type carousel type, particularly a C type in which CDs can be exchanged during a performance.
The present invention relates to a disc player such as a D changer.

[0002]

2. Description of the Related Art Conventionally, as a disk player of this type, a disk drive motor for a reciprocating linear mechanism for a tray and a motor for a rotation mechanism for rotating an optical pickup (recording / reading device) to a predetermined reproducing position are independently provided. It is also known to use a gear or clutch mechanism to switch between a reciprocating linear movement mechanism of a disc table and a rotation mechanism for rotating the optical pickup to a predetermined reproduction position.

Further, when a CD (compact disc) is playing (data is being read) and the disc table is in a position protruding from the inside of the housing (referred to as an open position) when the disc table is reciprocating linearly, the conventional apparatus described above. Is provided with a locking member such as a reciprocating linear movement restricting lever or a gear which is interlocked with the reciprocating linear movement mechanism, or is provided with a worm gear and the disc table is accidentally pushed into the housing by a hand etc. The movement in the insertion direction is regulated so that an accident such as damage to the machine does not occur (see Japanese Utility Model Laid-Open No. 5-90638).

[0004]

However, in the above-mentioned disc player, the loading mechanism for reciprocating linear movement of the tray and the rotating mechanism for moving the optical pickup to the reproduction target position are independent, and the gear train or the clutch mechanism is used. Since the reciprocating motion and the rotating motion are switched, there is a problem that the structure becomes complicated and the size becomes large.

Further, when the tray is in the open position (disk loading position), a regulating lever, a gear or a worm gear for regulating pushing by a hand etc. is provided in the casing of the tray, so that the structure is also complicated. There was a problem that became. Further, in the case of using the worm gear, there is a problem that the tooth surface of the worm gear is point-contacted, which may cause biting, resulting in unstable operation.

The present invention has been made to solve such a problem, and its purpose is to have a simple structure and a plurality of operations can be performed by a single motor, and when a tray is inserted while data of a disk is being read. It is to provide a disc player capable of preventing erroneous operation.

[0007]

In order to solve the above-mentioned problems, a disk player according to the present invention is capable of rotating a loading mechanism for reciprocating linear movement and a rotating mechanism for moving a recording / reading device to a reproduction target position. The drive base is connected via a transmission member, and the motor for rotationally driving the drive base causes linear reciprocating motion of the tray and rotation of the recording / reading device. The drive base is provided with a lock mechanism that prohibits the tray from being inserted into the housing except when the motor is driven.

[0008]

In the disk player according to the present invention, the linear reciprocating motion of the tray and the rotation of the recording / reading device are performed by the motor for rotating the drive base to move the tray in and out and move the recording / reading device up and down. Further, when the tray is in the open position in the CD playing state, the tray can be locked by the rotation of the drive unit, and the insertion of the disc table (tray) into the housing is prohibited.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying 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. The disc player 1 includes a disc 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 disc table 2 has a substantially disc shape, and circular disc mounting portions 2a for accommodating the discs 9 are provided at a plurality of places (for example, five places) as concave portions. The disc mounting portions 2a are formed with notches 2g provided in the center of the back surface of the disc table 2 and extending in the direction of the support shaft 2f. The disc table 2 is rotated and controlled in a clockwise / counterclockwise direction by a reduction mechanism attached to the tray 3 and a rotational position control switch (neither is shown).

The tray 3 has a bearing portion 3a in which the shaft 2f is loosely fitted, at the center of a recess having a size corresponding to the diameter of the disc table 2, and the disc table 2 is rotated about this bearing portion 3a. Supports freely.

2 is provided on the back surface of the tray 3,
It is an enlarged view of the gear rack of the gear racks 3b-3h which comprises the loading mechanism which carries out a reciprocating linear motion. Grooves 3i to 3n are provided in parallel inside the gear racks 3b to 3h, and the gear rack 3d is formed on a concentric circle centered on the rotation center of the drive base 7. 3p
Is a tray rib formed in parallel with the grooves 3i and 3m, and is formed higher than the gear racks 3b to 3h.

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 position detection switches 10 to detect the stop of the cam 8 and the drive base 7 and the open limit of the tray 3. 12 is attached.

Further, the shafts 13a and 13b formed on the upper surface of the fixed base 4 are inserted into the long holes 14a and 14b formed in the longitudinal direction of the rectangular cam 8 to move the cam 8 in the longitudinal direction. Sliding is possible. 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 the elevator base 5 described later is inserted into the other side of the cam 8 in a side view. 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 of the other side opposite to the pin 5c. It is provided. When these pins 5a and 5b are rotatably attached to the fixed base 4 and the cam 8 slides in the longitudinal direction, the pin 5c is fitted in the groove 8a in synchronization with the sliding of the cam 8. A swing arm type rotation mechanism is configured in which the elevator base 5 moves along with the rotation and 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 plane perpendicular to the Y-axis is defined as the X-axis, and the axis penetrating the plane perpendicular to the X-axis and the Y-axis is assumed to be the Z-axis (the same applies to FIGS. 5 to 8 below). 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 to Z.
Moves on the axis from the front side to the back side of the paper (referred to as descending),
On the contrary, 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 drawing toward the front side (referred to as upward movement).

The drive base 7 has a circular shape, and a notch gear 16 (transmission member) as a driving node that meshes with the notch rack 15 is provided on the circumference of the drive base 7 so that the drive base 7 can rotate about a shaft 7a. A stopper rib 7b, which is supported and has a height capable of contacting the gear rack 3p constituting the lock mechanism, is provided on the circumferential portion separated from the notch gear 16 by a predetermined distance.
Is provided. In addition, the notch rack 15 and the notch gear 1
The combination with 6 may be replaced 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.
Is provided, 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 large-diameter gear 22a on the lower side of the gears 22a and 22b formed in two steps, that is, adjacent to the gear 21.
The small-diameter gear on the upper side meshes with the large-diameter gear 24a on the lower side of the upper and lower two-stage gears 24a, 24b coaxially rotatably mounted on the shaft 23 fitted in the grooves 3i to 3o. Then, 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 decelerated by the transmission member composed of 24b and transmitted to the gear racks 3b to 3h at accurate timing, and the tray 3 is accurately moved in the direction of arrow AB by the movement of the shaft 23 (open / close operation). Can be made.

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 the case where the gear 24b meshes with the gear rack 3f and the elevator base 5 rises. In this state, when the motor 6 is rotated clockwise, the shaft 23 rotates the gear 24b. Accordingly, the tray 3 relatively moves in the direction of the arrow A in the groove 3m, and the tray 3 performs the closing operation. When the motor 6 is rotated counterclockwise, the shaft 23 relatively moves in the groove 3m in the direction of the arrow B as the gear 24b rotates, and the tray 3 performs the opening operation. In the case of FIG. 3, the opening / closing operation of the tray 3 may be performed by reversing the rotation direction of the motor 6 as compared with the case of FIG.

FIG. 6 shows a case where the gear 24b is meshed with the gear rack 3d. At this time, the notch rack 15 and the notch gear 16 are meshed with each other. Therefore, if the motor 6 is rotated clockwise, the elevator base 5 is mounted. It is shown that the mounted optical pickup 17 rises in synchronization with the downward movement of the cam 8.

Similar to FIG. 6, FIG. 7 shows the gear 24b engaged with the gear rack 3d.
5 and the notch gear 16 mesh with each other, so that it is shown that when the motor 6 is rotated counterclockwise, the optical pickup 17 mounted on the elevator base 5 descends in synchronization with the upward movement of the cam 8. There is.

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

Further, when the motor 6 is rotated from the state of FIG. 6 or FIG. 7 so that the gear 24b comes into mesh with the gear racks 3e to 3h or the gear racks 3c to 3b (see FIG. 2), the notch gear 16 of the drive base 7 is formed. And the notch rack 15 of the cam 8 are disengaged, the cam 8 is stopped, and the elevator base 5 is not moved up and down.
Only the open / close operation of the tray 3 is performed.
Incidentally, when the gear 24b is reversed in this state, the cutout gear and the cutout rack are again engaged with each other, contrary to the above.

FIG. 8 is a diagram showing the completion of the tray opening operation when the elevator base 5 is in the raised state, in which the gear 24b is engaged with the gear rack 3h. When the opening operation of the tray 3 is completed while the elevator base 5 is raised with the cam 8 thus moved downward, the drive base 7 goes around to a position where the stopper rib 7b overlaps the tray rib 3p in the direction of arrow AB, The stopper rib 7b and the tray rib 3p are in contact with each other to be in a locked state.

Therefore, the tray 3 cannot move 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. Therefore, the locked state cannot be released and the door cannot be closed except for turning it around to a position not facing.

With this configuration, even when the disc is exchanged during the performance, the tray 3 cannot be inserted into the housing by hand when the disc table 2 is not in the correct position, and the disc or the optical pickup during the performance. Can be prevented from being damaged.

[0030]

According to the present invention, a loading mechanism for reciprocating linear movement 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 or a cam. However, since the motor that rotationally drives the drive base performs a plurality of operations such as linear reciprocating motion of the disk table and rotation of the optical pickup, a drive mechanism for each mechanism and a clutch mechanism for switching the mechanism are unnecessary, and the mechanism is It can be simplified and the disc player can be downsized.

Further, since the drive base is provided with a lock mechanism for prohibiting the tray from being inserted into the housing except when driving the motor when the tray is pulled out from the housing in the playing state, the disk or the device can be operated with a simple mechanism. It is possible to prevent problems such as damage to the.

[Brief description of 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.

[Figure 2] Enlarged view of the gear rack

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

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

[Fig. 5] 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 completion state)

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

FIG. 8: Completion diagram of tray open operation when elevator base is raised

[Explanation of symbols]

1 ... Disc player, 2 ... Disc table, 3b ...
3h ... Gear rack, 5 ... Elevator base, 6 ... Motor, 7 ... Drive base, 17 ... Optical pickup (recording / reading device).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Minoru Ehara, 3-12 Moriya-cho, Kanagawa-ku, Yokohama-shi, Kanagawa, Japan Victor Company of Japan, Ltd. (72) Naoki Shibuya 3--12 Moriya-cho, Kanagawa-ku, Yokohama Address inside Victor Company of Japan, Ltd.

Claims (1)

[Claims] 1. A disc table on which a plurality of discs are placed on the same circumference, a tray for rotatably supporting the disc table, and the tray regardless of whether or not data on the disc is being read. A loading mechanism for linearly reciprocating the disc between a disc loading position and a reproducing position, a loading mechanism for rotating a reproduction target disc mounted on the disc table to the reproducing position, and a recording / reading device for reading data from the disc. In a disc player provided with a rotation mechanism for moving a recording medium to a reproduction target position in a housing, a loading mechanism for performing the reciprocating linear movement and a rotation 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 the drive base is rotated by a motor. (A) The linear reciprocating motion of (a) and the rotation of the recording / reading device are performed, and when the tray is pulled out from the housing while the data of the disk is being read, the drive base is in the housing of the tray other than the drive of the motor. A disc player having a lock mechanism for prohibiting insertion into a disc player.