JPH0749667Y2 - Drive mechanism of optical disk recording / reproducing apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a drive mechanism of an optical disc recording / reproducing apparatus, and more particularly to a drive mechanism of an optical disc recording / reproducing apparatus which sends an optical pickup and a disc tray by one motor.

[Prior Art] An example of a drive mechanism of a conventional optical disk recording / reproducing apparatus is shown in FIG.

A disc tray 10 on which an optical disc is placed is slidably supported by a chassis 11 via tray guides 12 and 12, and a tray rack 9 is fixed. Tray drive dedicated motor 13
Is transmitted to the tray rack 9 through the tray feed gear train 14, and the tray drive dedicated motor 13 sends the disc tray 10 into and out of the housing.

The pickup feed rack 5 is fixed to an optical pickup 7 supported so as to be movable in parallel with the turntable 6.

The rotation of the pickup drive dedicated motor 15 is transmitted to the pickup feed rack 5 via the pickup feed gear train 16, and the pickup drive dedicated motor 15 sends the optical pickup 7 so as to reciprocate with respect to the turntable 6.

[Problems to be Solved by the Invention] In the above-mentioned conventional device, since the disc tray and the optical pickup use different motors respectively, the disc loading operation for obtaining the optical pickup drive start signal is performed. The end detection switch is required, and the current switching circuit for supplying the motor current and the gear train are also required, resulting in a large number of parts and high cost.

The present invention was made in view of the above points,
It is an object of the invention to provide a drive mechanism of an optical disk recording / reproducing apparatus which sends an optical pickup and a disk tray by one motor.

[Means for Solving the Problem] A drive mechanism of an optical disk recording / reproducing apparatus of the present invention is a disk drive for loading an optical disk by a disk tray, in which a gear driven by a drive motor has a toothless portion. A cam groove in which a circular arc portion centering on the center of rotation and a spiral portion are connected to each other is provided, an optical pickup is sent by the cam groove, and a disc tray is sent by a gear having the toothless portion.

[Operation] According to the drive mechanism of the optical disc recording / reproducing apparatus of the present invention, the gear driven by the drive motor is provided with a cam groove having a constant radius portion, and the optical pickup is fed by this cam groove to drive the same motor. The optical disc is sent via a transmission mechanism having a pause.

In this way, the optical pickup can be stopped while the disc tray is being driven, and the disc tray can be stopped while the optical pickup is being driven. By rotating the drive motor forward and then reverse, the optical disc loading,
A series of operations such as reciprocating movement of the optical pickup and unloading of the optical disc are performed.

[Embodiment] A drive mechanism of an optical disk recording / reproducing apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

A disc tray 10 on which an optical disc is placed is slidably supported by a chassis 11 via tray guides 12 and 12, and a tray rack 9 is fixed.

The gear fixed to the rotary shaft of the drive motor 1 meshes with the full-tooth gear 2e provided in the lower stage of the gear 2, and the partial gear 2a provided in the upper stage of the gear 2 meshes with the tray drive intermediate gear 8. It is possible.

The remaining peripheral surface of the upper partial gear 2a of the gear 2 is a toothless portion 2b as shown in FIG. 2, and this portion does not interfere with the tray drive intermediate gear 8.

The tray drive intermediate gear 8 meshes with the tray rack 9.

The pickup feed rack 5 is fixed to an optical pickup 7 supported so as to be movable in parallel with the turntable 6.

The slider rack 3 is slidably supported by the chassis 11, and a pin 3a erected at the tip of the slider rack 3 is engaged with a cam groove provided on the upper surface of the gear 2.

The cam groove on the top surface of the gear 2 has a constant radius as shown in FIG.
It is composed of 2c and a spiral part 2d.

The rack 3b provided on the side surface of the slider rack 3 meshes with the large gear of the pickup feed intermediate gear 4, and the small gear of the pickup feed intermediate gear 4 meshes with the pickup feed rack 5.

In the above configuration, the drive motor 1 is rotated in the normal direction to rotate the gear 2
Is rotated in the direction of arrow A shown in FIG. 1, the disc tray 10 is fed into the housing and the optical disc is loaded. Meanwhile, the pin 3a is engaged with the constant radius portion 2c of the cam groove, and the optical pickup is stopped.

FIG. 1 shows the end of the loading process.

When the drive motor 1 is further rotated in the forward direction, the optical pickup is sent in a direction away from the turntable 6 and the optical disc is reproduced. After the reproduction process of the optical pickup is completed, when the drive motor 1 is rotated in the reverse direction, the optical pickup is sent in the direction of the turntable 6 and then the disc tray 10 is sent so as to project from the housing to unload the optical disc. Be seen.

[Effect of the Invention] According to the drive mechanism of the optical disk recording / reproducing apparatus of the present invention, the number of parts such as the detection switch, the motor drive circuit, and the reduction gear train is reduced because the optical pickup and the disk tray are driven by one motor. It is possible to significantly reduce the cost.

Further, since the cam groove is used, a mechanism for regulating the position of the optical pickup is not required, and the backlash of the cam can be reduced as compared with the gear, so that the optical pickup can be driven accurately. Further, since the operations are continuously performed, it is possible to obtain an effect that reliability is improved.

[Brief description of drawings]

FIG. 1 is a plan view showing a drive mechanism of an optical disc recording / reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view showing a gear of the same embodiment, and FIG. 3 is a drive mechanism of a conventional optical disc recording / reproducing apparatus. It is a top view showing an example of. 1 ... Drive motor, 2 ... Gear, 3 ... Slider rack, 4 ... Pickup feed intermediate gear, 5 ... Pickup feed rack, 6 ... Turntable, 7 ... Optical pickup, 8 ... Tray drive Intermediate gear, 9 …… Tray rack, 10 …… Disk tray, 11 …… Chassis, 12 ……
Tray guide, 13 …… Toilet drive dedicated motor, 14 …… Tray feed gear train, 15 …… Pickup drive dedicated motor,
16 …… Pickup feed gear train.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Nobuo Sera Inventor Nobuo Sera 2-17-5 Shibuya, Tokyo Stock company Kenwood (72) Inventor Tadashi Ansai 2-17-5 Shibuya Shibuya, Tokyo Stock association Company Kenwood (72) Inventor Kunio Imai 2-17-5 Shibuya, Shibuya-ku, Tokyo Stock Company Kenwood (72) Inventor Motomoto Matsumoto 2-17-5 Shibuya, Shibuya-ku Tokyo Stock Company (72) Creator Makoto Horibe 2-17-5 Shibuya, Shibuya-ku, Tokyo Kenwood, Inc. (72) Creator Yuji Mogi 2-17-5 Shibuya, Shibuya-ku, Tokyo Kenwood, Inc. (56) Reference Reference: Actual Kaihei 1-177490 (JP, U)

Claims (1)

[Scope of utility model registration request] In an optical disk recording / reproducing apparatus for loading an optical disk by a disk tray, a gear driven by a drive motor has a gear having a toothless portion, a cam having an arc portion centered on a rotation center and a spiral portion connected to each other. A drive mechanism of an optical disk recording / reproducing apparatus, wherein a groove is provided, an optical pickup is sent by the cam groove, and a disk tray is sent by a gear having the toothless portion.