JPH08255395A - Disk loading mechanism - Google Patents

Abstract

PURPOSE: To substitute a worm gear for the function of a clutch mechanism in a loading mechanism housing a disk. CONSTITUTION: In the main body 1, a tray 2 for placing the disk is supported freely so as to slide back and forth, and a rack 1a is formed on an inner side surface of the main body 1. A motor 3 pivotally supporting the worm gear 4, a worm wheel 5 engaging with the worm gear 4, a spur gear 6 coaxially and pivotally supported with the worm wheel 5, and a spur gear 7 linked with the spur gear 6, are provided on the rear side of the tray 2 as the driving device, and the spur gear 7 is engaged with the rack 1a. A lead angle of the worm gear 4 is set to wider than 4 degrees, thereby the worm gear 4 is rotated linking with the side of worm wheel 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc loading mechanism, and more particularly to a drive mechanism for the disc loading mechanism.

[0002]

2. Description of the Related Art As shown in FIG. 3, a disk loading mechanism of an information device such as a CD-ROM device receives a driving force from a motor 3 arranged on one side of a tray 2 supported by a main body 1 so as to be freely inserted and removed. A rack 1a that is transmitted to the spur gear 6 and the spur gear 7 via the worm gear 4, the worm wheel 5, and the clutch mechanism 8 and is formed on the inner surface of the spur gear 7 and the main body 1.
And the tray 2 is slid back and forth. The clutch mechanism 8 is interposed between the worm wheel 5 and the spur gear 6, holds a compression spring inside, and transmits power by the frictional force of the compression spring to form the clutch mechanism 8. The function of the clutch mechanism 8 is to prevent the clutch mechanism 8 from slipping and rotating to overload the motor 2 when the tray 2 is stopped due to some trouble and cannot be moved.
Even in F, the tray 2 can be manually put in and taken out by slipping of the clutch mechanism 8. However, since the clutch mechanism transmits power by the sliding mechanism, variations in the sliding load may occur, and the power may not be transmitted smoothly, resulting in defective loading of the tray 2. Further, the clutch mechanism requires parts cost and assembly cost, and cost reduction is required.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above point, and the function of the clutch mechanism constituting the loading mechanism is replaced by a worm and a worm gear, and the clutch mechanism is omitted and the loading mechanism is simplified. Is intended.

[0004]

In order to solve the above problems, the present invention is characterized in that the screw advance angle of the worm gear is set to a certain value or more.

[0005]

With the above construction, in the loading mechanism according to the present invention, the worm gear can be rotated by the worm wheel, whereby the clutch mechanism can be omitted.

[0006]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a sectional view showing the construction of a CD-ROM device incorporating a disc loading mechanism according to the present invention. A tray 2 is housed in the main body 1 of the apparatus so that it can be moved forward and backward, and a disc is placed on the tray 2 and is transported into the main body 1. A drive motor 3, a worm gear 4 rotatably attached to a rotation shaft of the drive motor 3, a worm wheel 5 meshing with the worm gear 4, and a rotation shaft of the worm wheel 5 are provided on one rear side of the tray 2 as a drive device. Further, a spur gear 6 coaxially attached to the spur gear 6 and a spur gear 7 meshing with the spur gear 6 are provided. Further, a rack 1a with which the spur gear 7 meshes is provided on the inner surface of the main body 1.

A worm gear 4 pivotally supported by the motor 3.
Is a screw-shaped gear formed in a cylindrical shape, and its lead angle Z is set to 4 degrees or more, as shown in FIG.

Next, the operation of the disk loading mechanism having the above structure will be described. When the lead angle Z of the worm gear is set to a certain value (4 degrees) or more, when the worm wheel 5 is rotated,
The worm gear 4 meshing with the worm wheel 5 can also follow and rotate.

From the worm wheel 5 side, the worm gear 4
Since the tray 2 can be rotated, it is possible to manually store the tray 2 in the main body 1 even when the tray 2 is stopped from the main body 1 when the power is off. Become. Further, since the clutch mechanism constituted by the pressing spring or the like is not required, the disc loading mechanism can be simplified and the number of assembling steps can be reduced.

[0010]

As described above, in the disc loading mechanism according to the present invention, the clutch mechanism can be constituted only by the worm gear and the worm wheel without the need for the clutch mechanism constituted by the compression spring or the like. In addition to reducing the cost of parts, the number of assembling steps can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic view of a disc loading mechanism according to the present invention.

FIG. 2 is a view showing a main part of a disc loading mechanism according to the present invention.

FIG. 3 is a diagram showing an outline of a disk loading mechanism according to a conventional example.

[Explanation of symbols]

 1 main body 1a rack 2 tray 3 motor 4 worm gear 5 worm wheel 6 spur gear 7 spur gear

Claims (2)

[Claims] 1. A driving force from a motor disposed on one side of a tray supported so as to be freely inserted into and taken out from a main body is transmitted to a spur gear via a worm gear and a worm wheel, and the spur gear and an inner surface of the main body. In a disk loading mechanism in which a rack formed in the above is meshed and the tray is slid forward and backward, the advance angle of the worm gear meshing with the worm wheel is set to a certain value or more. . 2. The disk loading mechanism according to claim 1, wherein the lead angle is 4 degrees or more.