JPS6334135Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a disk drive device for a recording/reproducing apparatus in which information is recorded or reproduced optically.

(B) Prior Art Conventionally, in devices for writing information on a disk or reading information from a disk, the disk is driven to rotate at its center.

FIG. 1 shows a conventional example. The center of the disk 1 is rotationally driven by a motor 3 via a drive shaft 2. Also, below disk 1 is disk 1.
A pickup 4 for writing information to or reading information from the disk 1 is installed so as to be slidable in the radial direction of the disk 1 along an axis 5.

However, since the disk 1 has a large moment of inertia, a motor 3 with a large torque is required to start and stop the disk 1 in a short time. There are spatial restrictions on the movement of the pickup 4 on the inner circumferential side.

Further, since the disk 1 is supported only at its center, rotation of the disk 1 causes surface wobbling (see arrow in the figure), which makes it difficult to write information to or read information from the disk.

Therefore, in order to solve the above-mentioned drawbacks, the present applicant has applied for the invention of Utility Model Application No. 33627/1983. According to this invention, the disk is rotated by a drive means including a pinch roller that comes into contact with the outer periphery of the disk. Therefore, the motor can be made smaller, and since the disk is supported by the center of the disk and the pinch roller, it is possible to prevent the disk from wobbling.

However, in the above invention, since the disk is exposed, there is a risk of scratching the surface, and the pinch roller is placed in direct contact with the outer periphery of the disk while the center of the disk is rotatably supported. This makes it difficult to replace the disk.

(c) Purpose of the invention The purpose of the invention is to provide a disk drive device that can reduce the size of the motor, prevent the surface of the disk from running out, protect the surface of the disk, and facilitate the attachment and detachment of the disk. It is in.

(d) Structure of the invention The disk drive device of the invention stores a disk in a state where it is rotatably supported at its center, and includes a storage case having at least a part of the light transmitting part, and a storage case that covers the outer periphery of the disk. It is comprised of a roller that is in contact with and attached to the case body, and a drive means that comes into contact with and drives the roller.

(E) Embodiment FIGS. 2 and 3 show an embodiment of the present invention. The storage case 10 is composed of a case body 10a and a case lid 10b screwed to the case body. The disk 11 is housed in a recess 12 provided in the case body 10a, and a fixing plate 13 is fixed to the case body 10a in a position above the disk 11. A rotating shaft 14 having a cross-shaped cross section is inserted into the center of the disk 11 from below the disk 11, and the rotating shaft 14 is supported by a bearing 15 provided on the case body 10a and the fixed plate 13. By doing so, the disk 11 is rotatably supported.

A part of the case body 10a includes the case body 10a.
A notch with a step-like side surface is provided from one end of a to the center of the disk 11 in the radial direction, and a light transmitting plate 16 is disposed in the notch so that light from a pickup (not shown) reaches the disk 11. It is becoming possible to do so. Note that the case body 10a is not limited to this configuration, and the case body 10a may be formed from a light-transmitting material.

The idler 17 is disposed in a notch 18 provided on one side of the case body 10a. The idler 17 is rotatably supported by an arm member 19 whose one end is rotatably attached to the case body 10a. Then pin 2 is attached to the case body 10a.
By bringing the torsion spring 21' fixed at 0' into contact with the other end of the arm member 19, the idler 17 is urged toward the disk 11 and comes into contact with the outer periphery of the disk 11. The idler 17 is made of an elastic material having a relatively large coefficient of friction, such as rubber. Further, the idler 17 has a groove formed over its entire outer periphery, and engages with the disk 11 so as to sandwich the outer periphery of the disk 11. The case lid 10b also has a notch at a position facing the notch 18 of the case body, so that the outer periphery of the idler 17 is exposed from the storage case 10.

Further, the driving means 20 includes a motor 21 and a capstan 22 that is rotationally driven by the motor.
Here, the motor 21 and capstan 22 are connected to the rotating plate 2.
3, and the rotating plate 23 is rotatable around a pin 24. A coil spring 25 attached to the rotating plate 23 is used to bias the capstan 22 toward the idler 17. The biasing force of the coil spring 25 causes the capstan 22 and the idler 17 to engage, and the rotational force of the motor 21 is transmitted to the disk 11 via the idler 17.

Next, the operation of inserting the storage case 10 into the recording/reproducing apparatus will be described with reference to FIGS. 4 to 6.

A driving means 20 is disposed on one side wall of an insertion opening 30 provided in the recording/reproducing apparatus, with a portion of the capstan 22 protruding into the insertion opening 30.
(Fig. 4) When the storage case 10 is inserted into the insertion slot 30 and the storage case 10 and the capstan 22 come into contact with each other, the rotating plate 23 rotates around the pin 24 against the biasing force of the coil spring 25. Rotate in the direction. Moreover, since the capstan 22 contacts the side surface of the storage case 10 and rotates, the entry of the storage case 10 is not hindered. (Fig. 5) When the storage case 10 reaches a predetermined position, the capstan 22 comes into contact with the idler 17, and the rotation of the capstan 22 is transmitted to the idler 17 by the urging force of the coil spring 25, and the disk 11 is rotationally driven. . (Fig. 6) (f) Effects of the invention According to the invention, since the disk is rotationally driven via a roller that contacts its outer periphery, the moment of inertia of the disk can be reduced, and the motor can be made smaller. . Furthermore, the rollers can prevent the disk from wobbling.

Further, since the disk is completely housed in the case and the roller that contacts the outer periphery of the disk is attached to the case, the surface of the disk can be protected and the disk can be easily attached and detached.

[Brief explanation of the drawing]

Fig. 1 is a side view schematically showing a conventional example, Figs. 2 to 6 show an embodiment of the present invention, Fig. 2 is an exploded perspective view, Fig. 3 is a sectional view, and Figs. FIG. 6 is a top view showing the inserted state of the storage case 10 according to its state. 10...Storage case, 11...Disk, 14
... Rotating shaft, 16 ... Light transmission plate, 17 ... Idler, 21 ... Motor, 22 ... Capstan.

Claims (1)

[Scope of utility model registration request] a storage case that stores a disk in a state where it is rotatably supported at its center and has a light transmitting section at least in part; a roller that abuts the outer periphery of the disk and is attached to the case body;
1. A disk drive device comprising: drive means for contacting and driving the roller.