JPH05266563A - Disk loading device - Google Patents

Abstract

PURPOSE:To smoothly move a tray whereon a disk is placed, when the tray is housed to a main body. CONSTITUTION:Pins 40 are provided on the left and right sides of the tray 32, and protrusions 41 are provided on the left and right sides of a main chassis 31. At the unloading time, the tray 32 is advanced up to the position where each pin 40 is engaged with the protrusions 41. At this time, positions of the left/right pins 40 and the protrusions 41 are adjusted so that the tray 32 is somewhat rotated to the side forming a rack 68. By this arrangement, when a driving gear 67 is rotated clockwise to load the tray 32 to the side of main body 98, the tray 32 is rotated clockwise beyond that position, thereby the generation of a cluttering is suppressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc loading device suitable for use in, for example, a compact disc player.

[0002]

2. Description of the Related Art FIG. 13 shows an example of the structure of a disc loading mechanism in a conventional compact disc player. A loading motor 2 is attached to the main chassis 1. This loading motor 2
A motor pulley 3 is fixedly attached to the rotating shaft of. A belt 5 is wound around the motor pulley 3, and the rotation of the belt 5 is transmitted to a loading pulley 4 which is rotatably held with respect to the main chassis 1. Besides, an intermediate gear 6 and a drive gear 7 are rotatably supported by the main chassis 1, and the rotation of the loading pulley 4 is transmitted to the drive gear 7 via the intermediate gear 6.

A tray 8 having a disk mounting portion 10 is movably supported by a guide 11 on the main chassis 1. A rack 9 is formed on one inner surface of the tray 8 so as to mesh with the drive gear 7.

When the loading motor 2 is rotated, the rotation is transmitted to the rack 9 via the motor pulley 3, the loading pulley 4, the belt 5, the intermediate gear 6 and the drive gear 7. As a result, the tray 8 is moved with respect to the main chassis 1. As a result, it is possible to load the disk mounted on the mounting portion 10 of the tray 8 to a predetermined position or to unload the disk from the predetermined position.

[0005]

By the way, in the conventional compact disc player, as shown in FIG. 14, the tray 8 is provided with the pin 23a so as to prevent the tray 8 from falling off from the main body 21. A protrusion 22a is formed on the main chassis 1 in the main body 21 so as to engage with the pin 23a at a predetermined position. As a result, when the tray 8 moves upward from the main body 21 in the drawing, at the position where the pin 23a is engaged with the protrusion 22a,
The tray 8 is prevented from further advancing.

By the way, when the tray 8 which has advanced to the predetermined position is retracted so as to be housed in the main body 21, the drive gear 7 is rotated clockwise in FIG. As a result, immediately after the retreat of the tray 8 is started, the pin 2 on the left side in the drawing is attached to the tray 8.
A moment acts so as to rotate clockwise in the figure with 3a as a fulcrum. As a result, the tray 8 once rotates to the position shown by the chain double-dashed line in FIG. As a result, there is a problem that the tray 8 does not move back smoothly and rattling noise is generated.

Therefore, for example, as shown in FIG. 13, a tray gear 12 is provided, and a rack is also provided on the left side of the tray 8 so that the driving force on the right side in FIG. It is also proposed to drive both sides.

However, if this is done, the movement of the tray 8 will be smooth, but the number of parts will increase and the cost will increase.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to make it possible to smoothly retract a tray with a simple configuration without increasing the number of parts.

[0010]

DISCLOSURE OF THE INVENTION A disc loading apparatus of the present invention comprises a tray 32 on which a disc 92 is placed and which is moved forward and backward with respect to a main body 91, and a gear 67 which is rotated to move the tray 32 forward and backward. A rack 68, which is provided on one side of the tray 32 and to which the rotation of the gear 67 is transmitted, and a pin 40 and a protrusion 41 as stoppers for preventing the tray 32 from falling off the main body 91 are provided. Is arranged so as to rotate in the direction of the rack 68 when the tray 32 advances from the main body 91 to a predetermined position.

One of the stoppers can be constituted by a pin 71b and a cam 67c which serve as members for restricting the rotation of the gear 67.

[0012]

In the disk loading apparatus having the above construction, when the tray 32 is advanced from the main body 91 to the predetermined position, it is slightly rotated in the direction of the rack 68. Therefore, rattling of the tray 32 is prevented when the backward movement of the tray 32 is started.

[0013]

1 to 5 show the construction of an embodiment of a disk loading apparatus of the present invention. FIG. 1 is a perspective view showing a state where the tray 32 is accommodated in the main chassis 31, and FIG. 2 is an exploded perspective view of the embodiment shown in FIG. 3 is different from the embodiment shown in FIGS. 1 and 2 mainly in the drive mechanism and the turntable chassis 5.
1 is a plan view showing a configuration in which 1 is attached, and FIG. 4 is a front view thereof. Further, FIG. 5 is a plan view showing a state where the tray 32 has advanced and a state where the tray 32 has retracted.

As shown in these drawings, a guide 31a is provided on the side of the main chassis 31, and a rail (projection) 32a of the tray 32 is engaged with the guide 31a. As a result, the tray 32 is moved to the position shown in FIGS.
Is movable in the direction indicated by the arrow.

A protrusion 35 is provided on the main chassis 31, and a chucking chassis 33 is fixed to the protrusion 35 with a screw. This chucking chassis 33
A hole 33a is formed in the hole 33a, and a small diameter chucking pulley 34a and a large diameter chucking pulley 3 are formed in the hole 33a.
A chucking pulley 34 composed of 4b is rotatably held. The chucking pulley 34b chucks the disk 92 (FIG. 12) placed on the turntable 53 (FIG. 5).

The tray 32 is formed with a concave portion 38 for mounting the disk 92 therein, and further inside thereof, a hole 3 for arranging the turntable 53 and the pickup 52.
7 are formed. Further, locking portions 36 are formed on the left and right of the tray 32 at the rear side. When the tray 32 is retracted farthest from the main chassis 31 (to the far right in FIGS. 3 and 5), the protrusion 33b of the chucking chassis 33 is positioned near the locking portion 36. Has been done. A rack 68 is formed on one side (upper side in FIG. 5) of the tray 32, and a pin 40 is planted at the rear of the opposite side. This pin 40 is used when the tray 32 is advanced to a predetermined position (the leftmost position in FIG. 5) (main body 91 (FIG.
2) The most advanced state), main chassis 3
It is adapted to engage with the projection 41 formed in 1.

As shown in FIGS. 3 and 5, an oval loading motor 61 is attached to the main chassis 31 so that its rotation axis is parallel to the advancing / retreating direction of the tray 32 (parallel to the paper surface). . A motor pulley 62 made of synthetic resin is coupled to the tip of the rotary shaft. The motor pulley 62 has a tapered surface 62a. The loading pulley 63 made of, for example, silicon rubber is rotatably supported by the main chassis 31 so as to have a rotation axis perpendicular to the rotation axis of the loading motor 61. The loading pulley 63 also has a tapered surface 63a, and the tapered surface 63a comes into contact with the tapered surface 62a of the motor pulley 62 and the rotation thereof is transmitted.

Further, as shown in an enlarged view in FIG. 6, the loading pulley 63 has a rotary shaft 80 at its center, and a cavity 80a is formed therein. The pin 83 formed on the main chassis 31 is fitted in the cavity 80a. A cavity 83a is formed in the pin 83, and the spring 81 and the pin 82 are inserted therein. The spring 81 presses the pin 82 upward in the drawing, and the upper end of the pin 82 upward in the drawing presses the inner wall of the rotating shaft 80 upward, so that the tapered surface 63a of the loading pulley 63 is the tapered surface of the motor pulley 62. It is adapted to be pressed against the 62a. This ensures that the rotation of the motor pulley 62 is transmitted to the loading pulley 63.

A gear 64 is coaxially formed below the loading pulley 63. And this gear 64
Is geared with a gear 65, and a small diameter gear 66 is coaxially coupled to the gear 65. The gear 66 meshes with the drive gear 67. And this drive gear 67
Mesh with the rack 68 (FIG. 5) of the tray 32.

As shown in FIG. 7, the drive gear 67 is composed of an upper gear 67a and a lower gear 67b, and a cam 67c is formed between them. This cam 6
The pin 71b of the rotating plate 71 (FIG. 3) is fitted to 7c. With the rotation of the drive gear 67, the pin 71b is guided by the cam 67c, and the rotating plate 71 is centered on the protrusion 71a rotatably supported by the main chassis 31 and is perpendicular to the paper surface in FIG. It is designed to be rotated in the direction.

In the hole 37 shown in FIG. 2, the holes 37 shown in FIGS.
The turntable chassis 51 is arranged as shown in FIG. The turntable chassis 51 is supported by the main chassis 31 via an insulator 54. A turntable 53 and a pickup 52 are arranged on the turntable chassis 51.
The turntable 53 is adapted to rotate the disc when the disc is placed on the turntable 53. When the disc is placed on the turntable 53, the chucking pulley 34b shown in FIG. 2 presses the disc on the turntable 53. The pickup 52 is on the turntable chassis 51,
It is movable in the left-right direction in FIG.

FIG. 8 shows an enlarged sectional structure of the insulator 54. As shown in the figure, the insulator 54 is composed of a member 94 formed of rubber, and this member 94 is formed by expanding parts 9a and 9a that expand outward.
There is a recess 94c recessed inwardly between 4b, and the turntable chassis 51 is supported in this recess 94c. A hollow portion 94d is formed inside the member 94, and the pin 91 of the main chassis 31 (or the rotating plate 71) is inserted therein. A screw 93 is screwed into the pin 91 via a washer 92.
The washer 92 prevents the member 94 from falling off the pin 91.

Thus, even if the main chassis 31 vibrates due to external vibration or the like, the vibration is damped by the member 94, and this vibration is generated by the turntable chassis 51.
It is made difficult to be transmitted to. Also, the recess 94
The distance between c and the pin 91 is set to be relatively large, and the turntable chassis 51 is not only slightly movable in the vertical direction in FIG.
The turntable chassis 51 can be tilted within a range of a predetermined angle with respect to 1.

9 and 10 show a state in which the rotating plate 71 and the turntable chassis 51 are thus rotated about the insulator 54 as a fulcrum. Figure 9
Shows the state where the tray 32 is advanced from the main chassis 31. At this time, as shown in FIG.
1 rotates clockwise in the figure with the protrusion 71a as a fulcrum. Further, the turntable chassis 51 rotates counterclockwise with the insulator 54 shown on the right side in the drawing as a fulcrum. The turntable chassis 51 and the rotating plate 71 are connected via an insulator 54 shown on the left side in the figure, but as described above, the insulator 54 rotatably holds the turntable chassis 51, Such rotation of the turntable chassis 51 is allowed.

As shown in FIG. 9, the turntable 53
When the tray 32 is moved to the lower side in the figure, the turntable 53 does not interfere even if the tray 32 is moved to the right side in the figure.

On the other hand, when the tray 32 is retracted to a predetermined position, the turntable chassis 51 and the rotating plate 71 are returned to the horizontal state as shown in FIG.
As a result, the turntable 53 projects upward and is inserted into the center hole of the disc carried by the tray 32. As a result, the disc is chucked between the chucking pulley 34 and the turntable 53.

Next, the operation will be described. As shown in FIG. 3, when the tray 32 is accommodated in the rightmost position with respect to the main chassis 31,
When the tray 32 is ordered to advance, the loading motor 6
1 is energized and it is rotated. This rotation is rotated by 90 degrees in the direction of its rotation axis by the motor pulley 62 and the loading pulley 63, and then the gear 64, the gear 6
5, transmitted to the drive gear 67 via the gear 66. As a result, the drive gear 67 is rotated counterclockwise in FIG. Since the drive gear 67 meshes with the rack 68 of the tray 32 as shown in FIG. 5, the rack 68 is moved leftward in FIG. 3 and is advanced from the main chassis 31 as shown in FIG. .

The tray 32 is in the state shown in FIG. 3 (accommodation position).
7, the pin 71b of the rotating plate 71 is fitted in the upper stage of the cam 67c shown in FIG. Then, when the drive gear 67 rotates, the pin 71b is moved downward in FIG. 7 along the inclined surface 67d of the cam 67c in accordance with this rotation. As a result, the rotating plate 71 is centered on the protrusion 71a,
It rotates clockwise as shown in FIG. Since the turntable chassis 51 is connected to the rotating plate 71 via the insulator 54, the turntable chassis 51 also rotates counterclockwise in FIG. In this way, since the turntable chassis 51 sinks downward, the operation of advancing the tray 32 to the unloading position can be performed without any trouble.

When the tray 32 has advanced to a predetermined position, as shown in FIG. 11, the pin 40 on the right side of the tray 32 is used.
Contacts the protrusion 41 of the main chassis 31. As a result, the portion of the tray 32 on the right side in the drawing is further provided with the main body 98
Will not be able to advance from.

On the other hand, the drive gear 67 is driven to further advance the tray 32 from the main body 98. As a result, as shown in FIG. 11, only the portion on the left side of the tray 32 in the drawing advances from the main body 98 forward (upward in the drawing).
Finally, the pin 40 on the left side in the figure (which is arranged behind the pin 40 on the right side by the distance d) comes into contact with the protrusion 41. As a result, the tray 32 can no longer be advanced. At this time, the rotation of the drive gear 67 is stopped. As a result, as shown in FIG. 11, the tray 32 stops at a position slightly rotated to the side where the rack 68 is formed (right side in FIG. 11).
Although FIG. 11 is drawn with a large inclination for convenience of description, the inclination is actually relatively small, and the user recognizes the tray 32 and the main body 98 as substantially parallel.

At such a position, when a disc is placed on the recess 38 of the tray 32 and a loading instruction is issued, the loading motor 61 is rotated in the opposite direction to the above case. As a result, the drive gear 67 is rotated clockwise in FIG. At this time, as described above, since the tray 68 is provided with the rack 68 only on one side thereof, the force acts only on the rack 68 side, and the tray 32 receives the moment rotating clockwise in FIG. Will be done. However, as mentioned above,
The tray 32 has already been stopped in a state of being slightly rotated clockwise. As a result, it can no longer rotate clockwise anymore. Therefore, the tray 32 can be smoothly retracted to the main body 98 side without rattling.

In FIG. 11, for the sake of convenience of description, the pin 40 and the protrusion 41 are formed on the right side of the tray 32 and the main chassis 31, but in the embodiment of FIGS. 1 to 5, this right side is formed. The stopper formed by the pin 40 and the protrusion 41 is not actually formed. Instead, at the time of unloading, as shown in FIG.
The engagement between 1b and the end 67e of the cam 67c occurs at a timing slightly earlier than the engagement between the pin 40 and the protrusion 41. That is, when unloading, the pin 71b
After the end portion 67e is engaged with the drive gear 67 to stop the rotation of the drive gear 67, the tray 32 attempts to further advance due to inertia. As a result, the right side of the tray 32 stops at the engagement position of the pin 71b and the end portion 67e, but the left side thereof further advances and stops at the position where the pin 40 and the protrusion 41 are engaged.

When the drive gear 67 rotates in the clockwise direction and the tray 32 is retracted toward the main body 98 side, when the tray 32 moves to a predetermined position, as shown in FIG.
Pin 71b is lifted by the inclined surface 67d of the cam 67c. As a result, the rotating plate 71 rotates counterclockwise in FIG. 9 about the protrusion 71a. As a result, the turntable chassis 51 is also lifted upward in FIG. Then, when the pin 71b reaches the groove (FIG. 7) on the upper side of the cam 67c, the rotating plate 71 and the turntable chassis 51 are held in a horizontal state (FIG. 10). At this time, the turntable 53 is fitted into the center hole of the disc. Then, the chucking pulley 34b presses this disc on the turntable 53. Therefore, it becomes possible to rotate the turntable 53 and reproduce the information from the disc.

On the other hand, although this disc player is normally placed horizontally for use, there are cases in which the player erroneously issues an unloading command while it is placed vertically. That is, the unloading command is issued in the state of being rotated 90 degrees clockwise from the state shown in FIG. In this case, since the turntable chassis 51 and the rotating plate 71 sink as described above, the disc mounted on the turntable 53 drops downward (right side in FIG. 10). However, in the present embodiment, since the tray 32 is formed with the locking portion 36, the disc is locked by the locking portion 36 and is prevented from falling further into the main body 98. Also,
In order to secure the locking by the locking portion 36, the chucking plate 34 is provided with a projection 33b, and the projection 33b extends to the vicinity of the locking portion 36.
As a result, when the disc falls, it is restrained from tilting enough to jump over the locking portion 36. As a result, the disc 99 is reliably locked to the locking portion 36.

After that, when the tray 32 is in a state where it has advanced from the main body 98 to a predetermined position, the position of the locking portion 36 is such that the disk 99 locked by the locking portion 36 is sufficiently exposed from the main body 98. Has been set (FIG. 12). Therefore, the user is not allowed to use the disc 9 locked by the locking portion 36.
9 can be reliably taken out. If the disc 99 is in its original position, place the disc 99 in the tray 3
It goes without saying that you can easily leave from 2.

[0036]

As described above, according to the disk loading apparatus of the present invention, the stopper is provided so that the tray is slightly rotated in the rack direction when the tray is advanced from the main body to the predetermined position. When retracting, the tray can be moved smoothly. As a result, no abnormal sound is generated and the operability is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an embodiment of a disc loading device of the present invention.

FIG. 2 is an exploded perspective view of the embodiment shown in FIG.

FIG. 3 is a plan view showing the configuration of an embodiment of the disc loading device of the present invention.

FIG. 4 is a front view of the embodiment shown in FIG.

5 is a plan view showing a state in which the tray 32 of the embodiment shown in FIG. 3 is advanced and retracted. FIG.

6 is an enlarged sectional view showing a more detailed structure of a motor pulley 62 and a loading pulley 63 in the embodiment shown in FIGS. 3 and 5. FIG.

7 is a diagram illustrating a cam formed on the side surface of a drive gear 67 in the embodiment shown in FIGS. 3 and 5. FIG.

8 is a cross-sectional view showing a detailed configuration example of an insulator 54 in the embodiment of FIG.

9 is a side sectional view showing a state in which the tray 32 of the embodiment shown in FIGS. 3 and 5 is pulled out.

10 is a tray 32 of the embodiment shown in FIGS. 3 and 5. FIG.
It is a side sectional view showing the state where it was stored.

11 is a tray 32 of the embodiment shown in FIGS. 3 and 5. FIG.
It is a figure explaining the state which was most advanced from the main body 91.

12 is a disk 9 of the embodiment shown in FIGS. 3 and 5. FIG.
FIG. 3 is a diagram illustrating a state where the tray 32 is advanced with 2 being locked by a locking portion 36.

FIG. 13 is an exploded perspective view showing a configuration example of a conventional compact disc player.

FIG. 14 is a bottom view for explaining a state in which the tray 8 in the conventional compact disc player is most advanced.

[Explanation of symbols]

 31 Main Chassis 32 Tray 33 Chucking Chassis 34 Chucking Pulley 36 Locking Part 40 Pins 41 Protrusion 51 Turntable Chassis 52 Pickup 53 Turntable 54 Insulator 61 Loading Motor 62 Motor Pulley 63 Loading Pulley 67 Drive Gear 68 Rack 71 Rotating Plate 80 Rotating shaft 81 spring

Claims (2)

[Claims] 1. A tray on which a disc is placed and which is moved forward and backward with respect to a main body, a gear which is rotated to move the tray forward and backward, and a rotation which is provided on one side of the tray and which transmits the rotation of the gear. And a stopper that prevents the tray from falling off the main body, and the stopper is arranged so as to rotate in the direction of the rack when the tray advances from the main body to a predetermined position. A disc loading device characterized by being provided. 2. The disk loading device according to claim 1, wherein one of the stoppers is formed of a member that restricts rotation of the gear.