JPH06124522A - Disk player - Google Patents

Abstract

PURPOSE:To center and support a chucking plate to a top door. CONSTITUTION:The rear surface of a chucking plate supporting part 3 of the top door 2 is provided with a conical projecting part 51 as a centering gap. The front surface of the chucking plate 4 is provided with a conical recessed part 52. This projecting part 51 and this recessed part 52 are fitted to each other, by which the chucking plate 4 is positioned (centered) to the top door 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a top door type disc player, and more particularly to a top door type disc player capable of supporting a chucking plate on the top door.

[0002]

2. Description of the Related Art As a top door type disc player, as shown in FIG. 5, a top door 101 and a chucking plate support portion 10 provided on the top door 101.
2 is supported by the chucking plate 103 and the chucking plate 103 in a state of being pressed against the chucking plate support portion 102, and the chucking plate support portion is supported when the top door 101 is closed. It is known that a chucking plate 103 is lowered from 102 and a chucking plate support mechanism 105 that attracts the chucking plate 103 to the disk table 104 side is provided.

Reference numeral 106 is a disk as a recording medium.

[0004]

By the way, the above-mentioned conventional top door type disc player has the following problems.
When the top door 101 is opened, the chucking plate support mechanism 105 presses the chucking plate 103 against the chucking plate support portion 102 to support the chucking plate 103, which causes the following problems.

(1) When the chucking plate 103 is pressed against the chucking plate support portion 102, the chucking plate 103 may cause a so-called misalignment.

(2) When the chucking plate 103 is displaced, the chucking of the disk 106 by the chucking plate 103 becomes incomplete, and the function of the chucking plate 103 can be fully exhibited. Can not.

The present invention solves the above-mentioned conventional problems, and provides a disc player capable of supporting a chucking plate on a chucking plate supporting portion with the chucking plate being accurately positioned when the top door is opened. It was made for the purpose of.

[0008]

According to the present invention, there is provided a top door, a chucking plate supported by a chucking plate support portion of the top door, and the chucking plate support portion when the top door is opened. A disk provided with a chucking plate support mechanism that presses the chucking plate to support the chucking plate, and when the top door is closed, the chucking plate is lowered from the chucking plate support portion to be attracted to the disk table. In the player, a chucking plate positioning mechanism is provided between the chucking plate support portion and the chucking plate.

[0009]

When the top door is opened, the chucking plate supporting mechanism presses the chucking plate against the chucking plate supporting portion so that the chucking plate is supported by the chucking plate supporting portion. At this time,
The chucking plate positioning mechanism positions the chucking plate, that is, the chucking plate is pressed and supported by the chucking plate support portion while being centered.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to FIGS.

1 and 2, reference numeral 1 is a disc player, and the disc player 1 is a top door (lid).
2 and a chucking plate support portion 3 of the top door 2
When the chucking plate 4 supported by the above and the top door 2 are opened, the chucking plate 4 is pressed against the chucking plate supporting portion 3 to support it, and when the top door 2 is closed, the chucking plate 4 is pressed. The chucking plate supporting mechanism 6 for lowering the chucking plate 4 from the plate supporting portion 3 to adsorb the chucking plate 4 to the disc table 5 is interposed between the chucking plate supporting portion 3 and the chucking plate 4. A chucking plate positioning mechanism 7 (see FIG. 4) for positioning the chucking plate 4 when the chucking plate 4 is pressed against and supported by the plate support portion 3.
It has and. Reference numeral 8 is a magnet provided on the disk table 5, and 9 is a disk as a recording medium.

The top door 2 is a pair of left and right arms 1.
It is rotatably attached to the chassis 15 by shafts 13 and 14 via 1 and 12, and is opened and closed by an opening / closing mechanism 16.

The opening / closing mechanism 16 includes the arm 11 on one side.
On one side surface, a fan-shaped gear 17 formed in a conical shape around the shaft 13 and a motor 19 for rotating the fan-shaped gear 17 via rotation transmission gears 18 ...

Then, when the fan-shaped gear 17 is rotated in one direction by the motor 19 via the rotation transmission gears 18 ... 18 with the top door 2 closed, a pair of left and right parts are formed together with the fan-shaped gear 17. The arms 11, 12 rotate in one direction, and the top door 2 is opened.

Further, in a state where the top door 2 is opened, the fan-shaped gear 17 is rotated in the other direction (the direction opposite to the opening direction of the top door 2) by the motor 19 via the rotation transmission gears 18 ... Then, the pair of left and right arms 11 and 12 rotate in the other direction together with the fan-shaped gear 17, and the top door 2 is closed.

Next, the chucking plate 4 will be described.

The chucking plate 4 is made of a magnetic material such as iron, and the magnet 8 of the disk table 5 is used.
The disk 9 is chucked onto the disk table 5 by being attracted to the disk table 5.

The chucking plate 4 is, as shown in FIG. 2, a plate body portion 21 for sandwiching the disc 9.
And a cylindrical shaft portion 22 provided at the center of the upper surface of the plate body portion 21, and a supporting flange portion 23 provided at the upper end of the shaft portion 22. Then, the above-mentioned flange portion 22 is attached to the chucking plate support portion 3 of the top door 2 by the chucking plate support mechanism 6 described below.
The chucking plate 4 is supported below the chucking plate support portion 3 in a so-called suspended state by being pressed against.

Next, the chucking plate support mechanism 6 will be described.

As shown in FIG. 1, the chucking plate supporting mechanism 6 includes a first rotating lever 31 for pressing the flange portion 23 of the chucking plate 4 against the chucking plate supporting portion 3 of the top door 2. A second rotating lever 32 for operating the first rotating lever 31 and the first rotating lever 32 through the second rotating lever 32 by applying a turning force to the second rotating lever 32. 31 is provided with a coil spring 33 that applies a turning force in a direction of pressing the flange portion 23 of the chucking plate 4 against the chucking plate support portion 3 of the top door 2.

The one end of the first rotating lever 31 is shown in FIG.
As shown in FIG.
A U-shaped notch 34, which is wider than the diameter of 2 and narrower than the diameter of the flange 23, is provided, and the other end of the U-shaped notch 34 is rotated by a shaft 35 to the bearings 36, 36 of the top door 2. Possibly pivoted.

Then, with the shaft 22 of the chucking plate 4 introduced from the tip of the U-shaped notch 34, the first rotating lever 31 is rotated clockwise about the shaft 35. Then, the flange portion 23 of the chucking plate 4 is lifted and the flange portion 23 is pressed against the chucking plate support portion 3 of the top door 2.

The second rotating lever 32 has a connecting pin 37 provided at one end thereof inserted into an elongated hole 38 provided at one side surface of the first rotating lever 31 so that the first rotating lever 31 can be operated.
And a central portion is pivotally attached to the bearings 40, 40 of the top door 2 by a shaft 39.

When the pressed portion 41 provided at the other end of the second rotating lever 32 is pushed down in the direction of arrow A, the second rotating lever 32 is rotated about the shaft 39 as shown in FIG. It rotates clockwise, and the connecting pin 37 causes the first rotating lever 31 to rotate.
Is rotated clockwise to press the flange portion 23 of the chucking plate 4 against the chucking plate support portion 3 of the top door 2.

When the pressed portion 41 is pushed up in the direction of arrow B, the second turning lever 32 moves about the shaft 39,
2, the connecting pin 37 rotates the first rotating lever 31 counterclockwise to move the chucking plate 4 to the chucking plate support portion 3 of the top door 2.
It is designed to drop from.

Further, the coil spring 33 is provided with a notch 4 for spring attachment provided on the second rotating lever 32.
A direction in which the flange portion 23 of the chucking plate 4 is pressed against the chucking plate support portion 3 of the top door 2 by the second rotating lever 32, which is attached to the first rotating lever 31. The turning power of is given.

The chucking plate support mechanism 6 has the above-described structure. As shown in FIG. 3, when the top door 2 is opened, the spring force of the coil spring 33 causes the second rotating lever 32 to rotate. Through the first turning lever 31
Is applied with a turning force in the clockwise direction to press the flange portion 23 of the chucking plate 4 against the chucking plate support portion 3 of the top door 2.

When the top door 2 is closed from the open state, the pressed portion 41 provided at one end of the second turning lever 32 is moved as shown in FIG. The connection pin 3 is pushed by the operation pin 43 provided on the chassis 15 and rotated clockwise about the shaft 39.
At 7, the first turning lever 31 is turned counterclockwise about the shaft 35 to lower the chucking plate 4.

When the chucking plate 4 descends, the chucking plate 4 is attracted to the disk table 5 side to chuck the disk 9.

Next, the chucking plate positioning mechanism 7 will be described.

The chucking plate positioning mechanism 7 is
As shown in FIG. 4, a convex portion (centering cap) 51 having a conical shape (correctly, a truncated cone shape) provided on the lower surface of the chucking plate support portion 3 and a conical shape provided on the upper surface of the chucking plate 4 are provided. And a concave portion 52 of.

When the flange portion 23 of the chucking plate 4 is pressed against the upper surface of the chucking plate support portion 3, the convex portion 51 and the concave portion 52 are fitted to each other,
The chucking plate 4 is positioned, that is, centered.

In the disc player 1 of the embodiment, as shown in FIG. 1, the pickup 61 is fixedly mounted on the chassis 15.

Then, the disc 9 is placed on the disc table 5 with the recording surface facing upward, and the disc 9 is moved in the horizontal direction together with the disc table 5 while the pickup surface of the disc 9 is picked up. Recording and reproducing are performed by applying the laser beam 61.

The disc player 1 of the embodiment has the above-mentioned structure, and when the top door 2 is opened with the disc table 5 returned to the predetermined position (eject position),
Pressed portion 41 by operation pin 43 provided on chassis 15
The second rotation lever 32 released from the pressing force of the
The rotation lever 31 is rotated to press the flange portion 23 of the chucking plate 4 against the chucking plate support portion 3 of the top door 2. At this time, the conical convex portion 51 provided on the lower surface of the chucking plate supporting portion 3 and the conical concave portion 52 provided on the upper surface of the chucking plate 4 are fitted to each other to position the chucking plate 4 (centering). ) Is done automatically.

After that, when the disk 9 is placed on the disk table 5 and the top door 2 is closed, the pressed portion 41 of the second rotating lever 32 is pressed by the operation pin 43 provided on the chassis 15, and the first rotation is performed. Since the pushing up of the chucking plate 4 by the moving lever 31 is released, the chucking plate 4 descends and is attracted to the disc table 5,
The disk 9 placed on the disk table 5 is chucked.

In the embodiment shown in the drawing, a conical convex portion 5 is formed on the lower surface of the chucking plate supporting portion 3 of the top door 2.
1 is provided and the conical concave portion 52 is provided on the upper surface of the chucking plate 4, but conversely, the conical convex portion 51 is provided on the upper surface of the chucking plate 4, and the chucking plate 4 is provided. A conical recess 52 is formed on the lower surface of the support portion 3.
May be provided.

Further, the shapes of the concave and convex portions 51 and 52 are not limited to the conical shape, as long as they can be surely positioned.

[0039]

The disc player of the present invention has the following effects.

(1) When the chucking plate is pressed against the chucking plate support portion of the top door, the chucking plate positioning mechanism positions the chucking plate so that the chucking plate is always supported at a regular position. be able to.

(2) It is possible to prevent the chucking plate from being displaced, and to make the chucking effect of the disk by the chucking plate more reliable.

[Brief description of drawings]

FIG. 1 is a perspective view.

FIG. 2 is an exploded perspective view of a main part.

FIG. 3 is a sectional view showing a state in which a top door is opened.

FIG. 4 is a sectional view showing a state in which a top door is closed.

FIG. 5 is a side view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Disc player 2 ... Top door 3 ... Chucking plate support part 4 ... Chucking plate 5 ... Disk table 6 ... Chucking plate support mechanism 7 ... Chucking plate positioning mechanism 51 ... Convex part 52 ... Recessed part

Claims (3)

[Claims] 1. A top door, a chucking plate supported by a chucking plate support portion of the top door, and when the top door is opened, the chucking plate is pressed against the chucking plate support portion, A chucking plate support mechanism for supporting and closing the top door to lower the chucking plate from the chucking plate support portion and adsorbing the chucking plate to the disk table. A disc player characterized in that a chucking plate positioning mechanism is interposed between the plates. 2. A chucking plate positioning mechanism,
Conical convex part provided on the chucking plate support part,
The disc player according to claim 1, wherein the disc player comprises a conical recess provided in the chucking plate. 3. A chucking plate positioning mechanism,
A conical recess provided in the chucking plate support,
The disc player according to claim 1, wherein the disc player comprises a conical convex portion provided on the chucking plate.