JPH09259519A - Apparatus for dampening rotary motion of disk-shaped recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a superior rotary motion-dampening apparatus which can avoid the danger of users due to a recent increased rotating speed of disks in a product incorporating a top-opened disk reader in a constitution to stop the rotation of disks through reverse rotation of a spindle motor or independent dampening in association with the friction within the motor. SOLUTION: A pad 13 is pressed by a correction spring 18 into touch with a cam part 17 of a rotary lid 12. When the rotary lid 12 is opened, the pad 13 following the cam part 17 butts to an outer circumferential end face of a disk 15 thereby dampening the rotation of the disk. If the rotary lid 12 is still further opened, the pad 13 moves away from the disk and returns to a start point when the rotary lid 12 is fully opened. Accordingly, a dampening timing can be regulated by a shape of the cam, without impressing a load to a motor 19 and without adversely influencing the operability when the disk 15 is loaded/unloaded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary motion damping device for a disk-shaped recording medium for stopping rotation when the disk is removed, in a recording apparatus using an open-top type disk-shaped recording medium.

[0002]

2. Description of the Related Art Conventionally, in a storage device using a disc-shaped recording medium such as an optical disc reader, when the open top type is used, the disc must be rotated to avoid danger to the user when the disc is removed and to protect the recording medium. It is necessary to depress and stop. Reduce the rotational movement of the disc,
A means for stopping is disclosed in JP-A-2-36782. The de-energizing and stopping means is shown in FIG. 4, and as shown in FIG.
The turntable 41 of the D player is rotated. The disk motor 42 can be normally rotated by a normal rotation drive voltage from the motor drive circuit 43, and can be reversed by a reverse rotation drive voltage having a polarity opposite to this voltage. The motor drive circuit 43 can supply a stop voltage of zero potential to the disk motor 42. In this way, reverse rotation deenergization of the spindle motor that rotates the disk is performed.

[0003]

However, this reverse rotation deenergization is not a mechanical deceleration despite the fact that the rotational speed of the disk increases year by year and the inertia of the disk increases, so the rotary lid is opened. In many cases, the user cannot completely stop the removal of the disc, and there is still a risk of injury at the outer peripheral edge of the disc rotated at a high speed, and a means for instantaneously stopping the rotation is required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rotational motion de-energizing device for a disk-shaped recording medium, which can be used together with reverse rotation de-energizing of a spindle motor to instantaneously stop the rotation of the disk and ensure the safety of the user. And

[0005]

In order to solve this problem, according to the present invention, the deenergizing device operates from the time when the user opens the rotating lid and the spindle motor is switched to the inertia rotation or the reverse rotation. The pressure reducing device is configured to be detached from the disc by pressing it against the disk and further with the rotating lid fully opened.

As a result, there is an effect that the rotation is stopped before the disc is taken out and the operability at the time of attachment / detachment is not affected.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is configured separately from reverse rotation deceleration of the spindle motor or friction in the spindle motor in a structure for stopping the rotation when the disk is disengaged, and the outer circumference of the disk. The depressurizing device depressurizes the pad by pressing it against the end face, and has the effect of depressing the rotation of the disc without damaging the disc recording surface.

According to a second aspect of the present invention, an urging spring is provided so as to press the pad against the outer peripheral end face of the disk in conjunction with the operation for opening the rotary lid of the storage device. Therefore, the timing of the deceleration can be achieved by the shape of the cam of the rotary lid. Claim 3 of the present invention
In the invention described in (1), the urging spring is not used, and the cam portion is the positive moving cam. The positive cam has the same function as the urging spring.

In the invention according to claim 4 of the present invention, the reverse rotation deceleration of the spindle motor is used in combination, so that a more reliable deceleration device can be obtained. According to a fifth aspect of the present invention, the disk can be easily attached and detached by separating the pad from the disk-shaped recording medium while the rotary lid of the storage device is fully open.

An embodiment of the present invention will be described below with reference to FIGS. (Embodiment 1) FIG. 1A is an external perspective view showing a storage device using a disk recording medium. FIG. 1B is a partial cross-sectional view showing the configuration of the rotational movement deenergizer of the recording apparatus. In FIG. 1, 11 is an upper housing of the storage device, 12 is a rotation lid attached to the storage device so as to rotate about a rotation shaft 12a, and has a cam portion 17. Numeral 13 is a pad that presses against the outer peripheral end surface of the disk 15 and acts to depress the rotation, and is preferably made of an elastic body such as rubber.
As the rubber, for example, fluorine rubber, urethane rubber or the like can be used, and urethane rubber is particularly preferable from the viewpoint of abrasion resistance. Reference numeral 14 is a slide rod formed of a material having a good slidability for fixing the pad 13, and is preferably made of polyacetal. The pad 13 and the rod 14 are connected by an adhesive or a fitting. The rod 14 is engaged with the upper housing 11 and is constantly brought into close contact with the cam portion 17 by the biasing spring 18. Reference numeral 16 is a detection switch for detecting the opening / closing of the rotary lid 12, and 19 is a spindle motor for rotating the disk 15.

Next, this operation will be described. FIG.
As shown in (a), the rotary lid 1 is used with the rotary shaft 12a as the rotary shaft.
When 2 opens, the detection switch 16 causes the spindle motor 1
9 is switched to inertia rotation or reverse rotation, and the rotation lid 1
The pad 13 is pressed against the outer peripheral end surface of the disk 15 following the cam portion 17 provided on the disk 2. Further, as shown in FIG. 2B, the pad 13 is moved in the detaching direction when the rotary lid 12 is continuously opened, and is returned to the original position when fully opened.

(Embodiment 2) FIG. 3 shows (Embodiment 1)
The cam portion 17 is used as the positive movement cam 37 and the function of the biasing spring 18 is combined. The rod 34 is engaged with the upper housing 31 and is always urged in the disengagement direction by the positive cam 37. Next, this operation will be described. In FIG. 3, when the rotary lid 32 is opened, the spindle motor 39 is switched to inertial rotation or reverse rotation by the detection switch 36, and the pad 33 comes into pressure contact with the outer peripheral end surface of the disk 35 following the positive cam 37. Further, when the rotation lid 32 continues to open, the pad 33 moves in the detaching direction and returns to the original position when fully opened.

Since the pad is applied to the end surface of the disk as described above, the disk surface is not scratched. Also,
By selecting the cam shape of the rotary lid 12, the timing of stopping the rotation of the disk can be adjusted.
In the above description, the pad control is explained by taking the configuration of operating the slide type rod using the cam as an example.
A rotary lever may be operated. Further, electric control without using a cam, control using an operating force at the time of the releasing operation of the rotary lid, and the like can be similarly performed.

[0014]

As described above, according to the present invention, the disc-shaped recording medium is formed by pressing the abrasion-resistant pad against the outer peripheral end face of the disc-shaped recording medium in cooperation with the rotary lid of the storage device. With the structure that stops the rotation of the medium, the recording surface of the disc is not scratched, the timing of the deceleration can be regulated by the shape of the cam, the load is not applied to the spindle motor for disc rotation, and the rotation lid is In the fully open state, the pad separates from the disc-shaped recording medium, so that the operability when the disc is attached and detached is not affected.

[Brief description of drawings]

FIG. 1A is an external perspective view of a storage device including a rotary motion damping device according to an embodiment of the present invention. FIG. 1B is a partial sectional view of a rotary motion damping device according to an embodiment of the present invention.

FIG. 2 is an operation explanatory diagram of the rotary motion damping device according to the embodiment of the present invention.

FIG. 3 is a block diagram of a rotary motion damping device using a positive cam.

FIG. 4 is a block diagram of a conventional motor stop detection circuit.

[Explanation of symbols]

 11 Upper Housing 12 Rotating Lid 12a Rotating Shaft 13 Pad 14 Rod 15 Disk 16 Detection Switch 17 Cam Part 18 Energizing Spring 19 Spindle Motor 31 Upper Housing 32 Rotating Lid 33 Pad 34 Rod 36 Detection Switch 37 Positive Confirmation Cam 39 Spindle motor

Claims (5)

[Claims] 1. When a disk-shaped recording medium mounted on a storage device and rotating is removed from the recording device, a pad having abrasion resistance is pressed against an outer peripheral end surface of the disk-shaped recording medium, A rotational motion damping device for a disk-shaped recording medium, characterized in that the rotation of the disk-shaped recording medium is stopped. 2. A rotating lid having a cam portion attached to a recording device for covering a disc-shaped recording medium, and a rod having a pad attached and having slidability are engaged by an urging spring. 2. The rotational movement damping device for a disk-shaped recording medium according to claim 1. 3. The rotary motion damping device for a disk-shaped recording medium according to claim 1, wherein the cam portion of the rotary lid is a positive cam. 4. The disk-shaped recording according to claim 1, wherein the disk-shaped recording medium is configured so as to stop the rotation of the disk-shaped recording medium by being used in combination with reverse rotation deceleration of a spindle motor for rotating the disk-shaped recording medium. Rotational motion damping device for media. 5. The rotary motion damping device for a disk-shaped recording medium according to claim 1, wherein the pad is separated from the disk-shaped recording medium when the rotary lid is fully open.