JP2002008356A - Door device for optical disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly reliable door device for an optical disk having no secular change. SOLUTION: (a) The tip end of an ejected optical disk 6 is abutted on a dustproof door 2, and the dustproof door 2 is pressed by the optical disk 6 and is rotated in the opening direction of the door around the central hole 2a of rotation. (b) When ejection of the optical disk 6 is made to progress, the optical disk 6 is pushed upward by a triangular rib 1a and an optical disk insertion slit 4c. (c) A cam 2c is rotated while deforming a spring 3, the dustproof door 2 is held in the opening state of the door by energizing force of the spring 3, and the optical disk 6 is ejected passing through the under side of the dustproof door 2. Although the optical disk 6 passes through in the state of being held by the dustproof door 2, the triangular rib 1a and the optical disk port 4c by elastic energizing force of the spring 3, since an arc surface 2d comes into contact with the optical disk 6 at an angle, the arc surface 2d comes into contact with only the outer peripheral part of the optical disk 6. An abrasion is never generated because the arc surface does not come into contact with the flat surface part of the same. Also, the highly reliable dustproof door 2 having no secular change is obtained because it is a rigid body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dustproof door for preventing dust from entering the inside of an optical disk reproducing apparatus or the like from an optical disk insertion slot.

[0002]

2. Description of the Related Art Hitherto, for example, an optical disk reproducing apparatus such as an in-vehicle CD player uses a dustproof door in which a slit is formed in a felt so that a flat portion of the optical disk is not scratched. . FIG. 5 is an exploded perspective view of a conventional optical disk door device.

1 is a front panel of the apparatus, 1a is an optical disk insertion slot, 8 is a dustproof door formed by inserting a slit 8a in felt, and 4 is a dustproof door 8 between the front panel 1 and the dustproof door.
The mouse 4 is configured to introduce an optical disk 6 from an optical disk insertion slot 1a formed in the front panel 1 into an optical disk playback mechanism (not shown).

[0004]

However, in such a conventional optical disc door apparatus, since the dust-proof door 8 is made of felt that does not scratch the flat portion of the optical disc 6, it is used for a long time. There is a problem in that the slit 8a remains open due to the deterioration of the felt strength due to the passage of the optical disk 6, humidity, and the like, and the dustproof performance is reduced.

An object of the present invention is to provide a highly reliable optical disk door device that does not change with time.

[0006]

According to a first aspect of the present invention, there is provided an optical disk door apparatus provided with a dustproof door for opening and closing an optical disk insertion slot, and the dustproof door is ejected by an optical disk ejecting operation of an optical disk reproducing mechanism. Are pivotally supported so that they come into contact with the back surface of the dustproof door to open the optical disc insertion opening.

According to a second aspect of the present invention, there is provided an optical disk door apparatus according to the first aspect, wherein the dustproof door has a surface formed by cutting a ridge formed by a back surface and a bottom surface into an arc in a front view with the door opened. Features.

According to a third aspect of the present invention, in the optical disk door device according to the second aspect, a dustproof door is disposed on one side with the optical disk ejected by the optical disk ejecting mechanism of the optical disk reproducing mechanism as a center, and the other side has a center. A rib having a height lower than both sides is formed, and the rib comes into contact with the outer periphery of the optical disk passing therethrough so as to push up the dustproof door in an opening direction via the optical disk.

According to a fourth aspect of the present invention, there is provided an optical disk door apparatus according to the first to third aspects, further comprising an urging means for elastically urging the dustproof door between an open state and a closed state. I do.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is an exploded perspective view showing an optical disk door device, FIG. 2 is a partial cross-sectional perspective view in which main components according to FIG. 1 are enlarged, and FIG. 3 is a bottom inner surface perspective view of the dustproof door 2 viewed from the bottom. FIGS. 4A and 4B are partial cross-sectional operation views of the operation of the dustproof door viewed from the side.

The optical disk insertion slot 1a of the front panel 1
Is provided with a dustproof door 2 pivotally supported by a mouse 4 disposed between the optical disc reproducing mechanism 7 and the mouse 4.

More specifically, the dustproof door 2 is rotatably attached to the mouse 4 with a rotation center hole 2a pivotally supported by a dustproof door rotation center shaft 4a. An arc surface 2d is formed on the bottom inner surface of the dustproof door 2 and is formed into an arc in a front view when the door is open.

The spring 3 is set in the gap between the spring seat 4b shown in FIG. 2 and the cam 2c of the dustproof door 2 as shown in FIG. The mouse 4 is fixed to the front panel 1 with a screw 5, and the cam 2 c of the dustproof door 2 and the spring 3 constitute urging means.

The mouse 4 has an optical disk insertion slot 4c formed by upper and lower surfaces of a circular arc in a front view. Behind the optical disk insertion slot 1a of the front panel 1, a triangular rib 1b composed of an arc having a height of 0 at the center is formed toward left and right ends.

The operation of ejecting the optical disk 6 according to this embodiment will be described with reference to FIG. (A) and (b) of FIG.
(C) shows the position of each component while the optical disk 6 is being ejected. When an optical disk eject button (not shown) is pressed, the optical disk reproducing mechanism 7 operates a loading mechanism (not shown) for discharging the optical disk 6 and causes the optical disk 6 to be discharged.

The tip of the ejected optical disk 6 contacts the arc surface 2d of the dustproof door 2 as shown in FIG. 4 (a).
To rotate in the door opening direction about the rotation center hole 2a.

As the ejection of the optical disk 6 proceeds, the outer periphery of the lower surface of the optical disk 6 comes into contact with the triangular rib 1a and the optical disk insertion slot 4c, so that the optical disk 6 is pushed upward. As a result, the dustproof door 2 contacting the outer periphery of the upper surface of the optical disk 6 is also pushed upward, and as a result, the cam 2c
It rotates while deforming the spring 3 as shown in FIG. At this time, when the cam 2c is rotated until the cam 2c is positioned below the horizontal line of the rotation center hole 2a, the dustproof door 2 is rotated and held at a stretch until the door is fully opened by the elastic restoring force of the spring 3.

The optical disk 6 is discharged under the dustproof door 2 as shown in FIG. 4C by the operation of the loading mechanism of the optical disk reproducing mechanism 7. After the optical disc 6 is ejected, the door 2 can be fully closed by manually lowering the claws 2b provided on the dustproof door 2.

When the optical disk 6 is ejected, the dustproof door 2 and the triangular rib 1a and the optical disk insertion slot 4c are moved by the elastic biasing force of the spring 3 as shown in FIG.
However, the arc surface 2d has an arc surface shape obtained by cutting a ridge formed by the back surface and the bottom surface of the dustproof door 2 into a circular arc in a front view with the door open, so that the arc surface 2d has an angle with the optical disc 6. You will come in contact with it. As a result, the dustproof door 2 contacts only the outer peripheral portion of the optical disc 6 and does not contact the flat portion, so that no abrasion occurs.

The fact that the lower surface of the optical disc is not damaged during the ejection operation will be described in more detail. The tip of the ejected optical disc 6 in FIG. 4A contacts the zero-height portion of the triangular rib 1a. Subsequently, when the discharging operation proceeds, the contact point between the optical disk and the triangular rib 1a is lower than the tip lower surface because the triangular rib 1a is higher toward the outside from the center as viewed from the front and the outer circumference of the optical disk is a circle. From the point shown in FIG.
(B), it spreads in both the depth direction and the front direction, and converges to a lower point at the rear end of the optical disk when passing through the maximum outer diameter of the optical disk.
As described above, since the contact point moves on the outer periphery of the optical disk, the recording surface is not damaged.

The fact that the upper surface of the optical disc is not damaged during the ejection operation will be described in more detail. The tip of the ejected optical disc 6 in FIG. 4 (a) contacts the arc-shaped surface 2d of the dustproof door 2 at a point. When the discharge operation continues,
The contact point at the leading end of the optical disk rotates the dustproof door 2 while sliding on the arc-shaped surface 2 d, and sinks under the dustproof door 2. Arc surface 2
As shown in FIG. 3, d is formed in an arc so that it becomes maximum at the center. Therefore, when the dustproof door 2 rotates around the rotation center hole 2a, the ridge line between the lower surface of the dustproof door 2 and the circular arc surface 2d becomes front. The center becomes a high arc when viewed, and the center part escapes as the rotation progresses. Therefore, the contact point of the optical disk extends from the upper point of the front end surface to the outer circumferential part of the lower surface of the optical disk as shown in FIG. (B), it spreads in both the front and rear directions, and converges to the upper point of the rear end of the optical disk when passing through the maximum outer diameter of the optical disk. As described above, since the contact point moves on the outer periphery of the optical disk, the recording surface is not damaged.

In the above embodiment, the dustproof door 2 is rotated by the cam 2c until the door is opened and held at a stroke. However, the cam 2c is set so that the door is closed after the optical disc 6 is ejected. It is also feasible to change the shape of.

For example, in the above embodiment, the dustproof door 2
The biasing means using the cam 2c and the spring 3 forms the cam 2c so as to bias the dustproof door 2 to a position where the arc surface 2d of the dustproof door 2 comes into contact with the ejected optical disc 6 and is fully opened. When the user inserts the optical disk 6, the user
Is lifted by a manual operation and rotated to a position beyond the top of the cam 2c to urge the dustproof door 2 to the fully open position by the urging force of the spring 3, and when the insertion of the optical disk 6 is completed, the user manually operates the claw 2b. The dustproof door 2 is pushed down by operation and turned to a position beyond the top of the cam 2c, and the urging force of the spring 3 urges the dustproof door 2 to the fully closed position. When ejecting the optical disc 6,
The dustproof door 2 is rotated against the urging force of the spring 3 until the arc surface 2d of the dustproof door 2 comes into contact with the ejected optical disk 6 and does not exceed the top of the cam 2c. When the optical disk 6 passes, the dustproof door 2 is urged to the fully closed position by the urging force of the spring 3.

[0024]

As described above, according to the optical disk door device of the present invention, the dustproof door for opening and closing the optical disk insertion port is provided.
The dust-proof door is pivoted so that the optical disc ejected by the optical disc ejecting operation of the optical disc reproducing mechanism contacts the back surface of the dust-proof door and the optical disc insertion opening is opened, so that the change with time as in the case of the conventional felt is performed. And a highly reliable optical disk door device can be realized.

According to this structure, the closed optical disk insertion opening can be opened only by the acting force from the moving optical disk ejected from the loading mechanism of the optical disk reproducing mechanism. Compared to a configuration in which power is supplied by a belt or gears to open and close the dustproof door, the dustproof door can be configured with fewer components.

Also, a dustproof door is disposed on one side with the optical disc ejected by the optical disc ejecting operation of the optical disc reproducing mechanism at the center, and a rib is formed on the other side, the center of which is lower than both sides. By providing a configuration in which the rib contacts the outer periphery of the optical disc and pushes up the dustproof door in the opening direction through the optical disc, or by providing an urging means for elastically urging the dustproof door between the open state and the closed state, A highly reliable dustproof door that does not change over time without scratching the flat portion of the optical disk can be configured.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an embodiment of an optical disk door device according to the present invention.

FIG. 2 is a partial sectional perspective view showing a main part of FIG. 1;

FIG. 3 is a perspective view of an inner bottom surface of the dustproof door according to the embodiment.

FIG. 4 is a discharge process diagram of the embodiment.

FIG. 5 is an exploded perspective view of a conventional optical disk door device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front panel 1a Optical disk insertion opening 1b Triangular rib 2 Dustproof door 2a Rotation center hole 2b Claw 2c Cam 2d Arc surface 3 Spring 4 Mouse 4a Rotation center axis 4b Spring seat 4c Optical disk insertion opening 5 Screw 6 Optical disk 7 Optical disk reproduction mechanism

Claims (4)

[Claims] A dustproof door for opening and closing an optical disc insertion opening is provided, and the optical disc ejected by an optical disc ejecting operation of an optical disc reproducing mechanism is brought into contact with the back surface of the dustproof door to open the optical disc insertion opening. Optical disk door device pivoted like this. 2. The optical disk door device according to claim 1, wherein the dustproof door has a surface formed by cutting a ridge formed by a back surface and a bottom surface into a circular arc in a front view when the door is open. 3. A dustproof door is arranged on one side of the optical disc ejected by the optical disc ejecting mechanism of the optical disc reproducing mechanism, and a rib is formed on the other side, the center of which is lower in height than both sides. 3. The optical disc door apparatus according to claim 2, wherein the rib contacts the outer periphery of the optical disc to push up the dustproof door in an opening direction via the optical disc. 4. The optical disk door apparatus according to claim 1, further comprising an urging means for elastically urging the dustproof door between an open state and a closed state.