JP2555192Y2 - Player for compact disc - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact disc player of the type capable of accommodating ordinary compact discs (diameter 12 cm disc) and single compact discs (diameter 8 cm disc).

[0002]

2. Description of the Related Art Generally, a compact disk (hereinafter referred to as "C
D), the loaded CD is directly loaded and unloaded, the loaded CD is received by the disc stopper, and the CD is positioned at the play position. Therefore, in order to support two types of CDs having different diameters, it is necessary to change the position of the disk stopper according to the type.

As this type of player, for example, a technique disclosed in Japanese Utility Model Laid-Open No. 3-23851 can be mentioned. In this publication, when a large-diameter CD is loaded, the outer peripheral portion of the CD interferes with a pair of left and right lock arms, and both lock arms are rotated to unlock positions. As a result, the disc stopper locked at the position for receiving the small-diameter CD is released, and moves together with the large-diameter CD to the position for receiving the CD.

[0004]

[Problems to be solved by the invention]
As described above, the lock and release of the disc stopper are realized by rotating the pair of lock arms. However, a rotating member such as this lock arm
It is generally made of metal in order to guarantee its mounting strength and the like. Further, since a pair of lock arms are required, the structure is complicated, and as a result, the cost of the product is increased.

A technical problem of the present invention is to realize locking and unlocking of a disk stopper by reciprocating sliding of one lock member.

[0006]

In order to solve the above-mentioned problems, a compact disk player according to the present invention is configured as follows. That is, a disc stopper which can receive the compact disc at the time of loading, and which is provided so as to be movable between two regulating positions for positioning the small-diameter and large-diameter compact discs at the respective play positions, and the disc stopper. A lock member that can slide between a lock position that can be locked at the two restriction positions and an unlock position that releases the lock member, and that always receives elastic force in the direction toward the lock position, and a large-diameter compact And a detecting member which operates so as to once slide the lock member toward the unlock position by receiving an interference effect of the outer periphery of the disk when loading or unloading the disk.

[0007]

In this configuration, it is assumed that the disc stopper is locked at a regulation position for receiving a small-diameter CD at its play position. So a large CD
Is started, the lock member slides once to the unlock position by the operation of the detection member receiving the interference of the CD, and then returns to the lock position again.
Accordingly, the lock of the disk stopper is released, and the disk stopper moves together with the large-diameter CD, and is locked again by the lock member at the restricted position for receiving the CD at the play position.

As described above, since the locking and unlocking of the lock member at the two restricting positions is realized by the reciprocal sliding of one lock member, the structure of this type of player is simplified. Further, since the lock member may be assembled so as to be reciprocally slidable, it does not require much strength itself, and can be formed of, for example, a synthetic resin material.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIG. 1 is a plan view showing a floating portion of a compact disc player when a single CD (8 cm diameter disc) is loaded, and FIG. 2 is a sectional view of FIG.

In these drawings, a traverse plate 10 is floatingly supported by a chassis (not shown), and includes a turntable 12 for a CD and a DC motor 13 as a drive source thereof. The top plate 20 arranged on the upper surface side of the traverse plate 10
The traverse plate 10 is rotatably attached to one end of the traverse plate 10 by a hinge pin 22.

On the other end side of the traverse plate 10, a loading roller 18 is disposed. Both ends of this roller 18 are roller arms 1 respectively.
The roller arm 14 is rotatably mounted to the chassis by hinge pins 16. Note that the roller 18 is always pressed (except during play) against the lower surface of the pad 19 fixed to the chassis side by the elastic force urging the roller arm 14 around its hinge pin 16. And this roller 1
When a part of the CD is inserted between the pad 8 and the pad 19, and the roller 18 is rotated by being driven by a motor (not shown), the loading of the CD is started.

On the back side of the top plate 20, there is provided a disk stopper 30 capable of receiving the outer periphery of the CD during loading. The disc stopper 30 is attached to the top plate 20 so as to move along a guide hole 24 formed in the CD loading direction at a substantially central position of the top plate 20.

That is, the disk stopper 30 is
1 and 2 for positioning a small diameter CD (8 cm diameter disc) at its play position, and a second position for positioning a large diameter CD (12 cm diameter disc) at its play position as described later. It can move between the restriction position (see FIG. 5).

Further, a stopper interlocking member 36 is rotatably mounted on a surface side of the top plate 20 by a shaft 38. An elongated hole 39 formed in an extension of the stopper interlocking member 36 is connected to the protrusion 32 formed on the disc stopper 30 and located on the surface side of the top plate 20 from the guide hole 24. . Therefore, the stopper interlocking member 36 rotates around the shaft 38 in conjunction with the movement of the disk stopper 30. The stopper interlocking member 36
A lock pin 40 is fixed to the back surface of the top plate 20, and the pin 40 is displaced along the arc hole 26 of the top plate 20 when the stopper interlocking member 36 rotates around its axis 38.

Between the front surface of the top plate 20 and the back surface of the stopper interlocking member 36, a lock member 50 made of synthetic resin is slidably mounted in a direction perpendicular to the moving direction of the disk stopper 30. . That is, the lock member 50 slides with respect to the top plate 20 while being guided by the two holes 28 formed in a direction orthogonal to the guide holes 24 for the disk stopper 30. The lock member 50 is provided with a shaft 38 of the stopper interlocking member 36, and is formed with a relief hole 51 long in the sliding direction to avoid interference with the shaft 36.

In the lock member 50, two lock recesses 52 and 53 are formed at the end of the stopper interlocking member 36 on the side corresponding to the lock pin 40. When the disc stopper 30 is at the first regulating position shown in FIGS. 1 and 2, the locking pin 40 is engaged with one of the lock recesses 52. In this state, the stopper interlocking member 36 cannot rotate around its axis 38, and the disk stopper 30 is locked at the first restriction position.

A return spring 54 is hung between the stopper interlocking member 36 and the lock member 50. The elastic force of the spring 54 acts to pull the lock member 50 back to the lock position shown in FIGS. At the same time, the elastic force of the spring 54 acts to rotate the stopper interlocking member 36 to a position shown in the drawing (a position for holding the disk stopper 30 at the first restriction position).

On the side where the CD is inserted between the roller 18 and the pad 19, an arm-shaped detecting member 60 is provided.
Is arranged. The detection member 60 is rotatably attached to a chassis (not shown) by a support shaft 61. At one end of the detection member 60, an interference pin 62 is fixed, which interferes with the outer periphery of a CD having at least a large diameter when loading or unloading the CD.

The other end of the detecting member 60 is connected to an end of an interlocking lever 64 which is also rotatably attached to the chassis by a support shaft 65 so as to be interlockable. At the free end of the interlocking lever 64, an action piece 66 is formed which can abut against a part 56 of the lock member 50.

When loading (or unloading) a large-diameter CD, the interference pin 62 of the detection member 60 is pushed on the outer periphery of the CD, and the detection member 60 rotates around its support shaft 61. When the interlocking lever 64 pivots about its support shaft 65 in conjunction with this, the action piece 66 hits a part 56 of the lock member 50, and the lock member 50 is unlocked from a lock position shown in the drawing. It functions to slide toward the position (see FIG. 4).

In the above configuration, when a small-diameter CD is inserted between the roller 18 and the pad 19 and loading is started as described above, the CD is placed in the first regulating position shown in FIGS. The disc is stopped by the locked disc stopper 30 and positioned at the play position. However, when a small-diameter CD is inserted in a direction of the width of the player, the outer periphery of the small-diameter CD contacts the interference pin 62 of the detection member 60 as in the case of loading a large-diameter CD described below. In some cases, the detection member 60 is rotated to slide the lock member 50 to the unlock position shown in FIG. However, in this case, by the time the small-diameter CD reaches the position where it can be received by the disk stopper 30, the lock member 50 has returned to the lock position again, and thus the disk stopper 30 is locked at the first regulating position.

Note that the small-diameter CD is
After the top plate 20 is positioned at the play position, the top plate 20 rotates about the hinge pin 22 to the state shown in FIG. As a result, the CD is set on the turntable 12 of the traverse plate 10 and enters the play state.
At this time, the roller arm 14 also has its hinge pin 16
The roller 18 is rotated around and the roller 18 is separated from the CD.

Next, loading of a large-diameter CD will be described. First, it is assumed that the disc stopper 30 is locked at the first restriction position. So a large CD
Is started, the outer periphery of the CD comes into contact with the interference pin 62 of the detection member 60 and the detection member 6
0 is largely rotated about its support shaft 61. Thereby, as described above, the lock member 50 is slid to the unlocked position shown in FIG. 4 through the rotation of the interlocking lever 64.

When the lock member 50 is slid to the unlock position, the lock recess 52 is disengaged from the pin 40 of the stopper interlocking member 36, and the stopper interlocking member 36 can be turned around the shaft 38.
That is, the disc stopper 30 is unlocked at the first regulating position, and thereafter moves to the second regulating position shown in FIG. 5 together with the large-diameter CD that continues to be loaded.

However, when the loading of a large-diameter CD proceeds further from the state shown in FIG.
Due to the force of a return spring (not shown) acting on 0, the displacement starts in the original direction following the outer periphery of the CD.
That is, both the detecting member 60 and the interlocking lever 64 rotate in the original directions, whereby the lock member 50 also slides toward the locked position by the action of the spring 54. In the state of FIG. 5, the detection member 60 and the interlocking lever 64 have completely returned to their original positions, and the lock member 50 has returned to the lock position.

When the disc stopper 30 moves together with the CD, the stopper interlocking member 36 also turns to the state shown in FIG. Combine. As a result, the disc stopper 30 is locked at the second restriction position. Therefore, the large-diameter CD is positioned at its play position by the disc stopper 30 at the second restriction position. Thereafter, as in the case of the small-diameter CD, the top plate 20 rotates to enter the play state.

At the time of unloading a large-diameter CD, the outer periphery of the CD comes into contact with the interference pin 62 of the detection member 60 again to rotate the detection member 60 and the interlocking lever 64. As a result, the lock member 50 slides to the lock release position, and the lock concave portion 53 moves to the stopper interlocking member 36.
From the pin 40. This causes the stopper interlocking member 36 to rotate from the position shown in FIG. As a result, the disc stopper 30 is interlocked with the rotation of the stopper interlocking member 36 and moves toward the first regulating position with the unloading of the CD.

When the unloading of the large-diameter CD is completed, the lock member 50 has returned to the lock position, and the disk stopper 30 has returned to the first regulating position. The pin 40 of the stopper interlocking member 36 is engaged with the lock concave portion 52 of the lock member 50, so that the disk stopper 30 is locked at the first restriction position.

[0030]

[Effects of the Invention] As described above, the present invention is applicable to a small-diameter and a large-diameter C.
Locking and unlocking of the disc stopper at two restricting positions for positioning D at the respective play positions can be realized by reciprocating sliding of one lock member, thereby simplifying the structure as a compact disc player.

[Brief description of the drawings]

FIG. 1 is a plan view showing a floating portion of a CD player when loading a single CD.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is a cross-sectional view showing a play state in correspondence with FIG. 2;

FIG. 4 is a plan view showing a loading state of a large-diameter CD.

FIG. 5 is a plan view showing a completed loading state of a large-diameter CD.

[Explanation of symbols]

 Reference Signs List 30 Disc stopper 50 Lock member 60 Detection member

Claims (1)

(57) [Scope of request for utility model registration] 1. A disc stopper which can receive a compact disc at the time of loading, and is provided so as to be movable between two regulating positions for positioning a small-diameter and a large-diameter compact disc at respective play positions. A lock member that is slidable between a lock position at which the disc stopper can be locked at the two restriction positions and an unlock position at which the disc stopper is released, and which always receives elastic force in the direction toward the lock position; A compact disk player comprising: a detection member that operates to slide the lock member toward the unlocked position once during the loading or unloading of a large-diameter compact disk by the interference of the outer periphery of the disk.