JPH077551B2 - Disc player - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a disc player in which a disc is inserted into a player by a tray.

(Prior Art) FIG. 9 is a schematic sectional view of a conventional disc player, and FIG. 10 is a bottom view of FIG.

A turntable 100 and an optical pickup (not shown) are arranged inside the disc player, and the disc 102 is correctly placed on the turntable 100 and rotated to read information by the optical pickup.

The disc player is provided with a tray 103 for moving the disc 102 horizontally, and the disc elevating mechanism 10 is mounted on the tray 103.
Equipped with 4.

The disc elevating mechanism 104 includes claws 106 attached to the tray 103 so as to be vertically movable, a lever 107 having a cam inclined surface for elevating the claws 106, and the lever 107. It consists of a forcibly moving rack 108.

Four claws 106 are provided on the upper surface of the tray 103 that is pulled out to the front.
.. are projected, the disc 102 is manually placed on these claws 106 as shown in FIG.

When the disc insertion operation switch is pressed, the pinion 109 at the lower right of the figure rotates to feed the rack 108, and the tray 103 advances to reach the inside of the player in FIG.

If the tray 103 hits a stopper (not shown) inside the player and stops at a predetermined position, the rack will continue to move in the future.
108 (Fig. 10) rotates the lever 107 around the fulcrum 107a,
As a result, the claws 106 move down with respect to the tray 103.

The lowered disk 102 is the turntable 1 waiting below.
Appears on 00.

(Problems to be Solved by the Invention) In the above-mentioned conventional player, since the disc is placed on the four claws protruding above the tray, the operator needs to pay sufficient attention so that the disc is favorably placed on the claw. However, it is not easy to handle.

In addition, since the tray has claws, levers, cams, etc., the structure of the tray is complicated, and the tray becomes heavy, so that the drive motor and drive system components become large, which makes it difficult to miniaturize the disc player. .

Therefore, an object of the present invention is to reduce the weight of the tray and the size of the disc player.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a base provided with a pinion that rotates a loading mechanism of a disc player forward and backward, and a disc supported by the base so as to be movable forward and backward. A tray, a front and rear rack and a cam groove attached to the tray, a lateral movement member supported by the base so as to be movable in the left and right directions, and a lateral movement member for raising and lowering a turntable and an optical pickup unit, and the front and rear rack. It is characterized in that a rack arranged near the intersection with the left and right racks and meshing with the pinion is composed of a vertical and horizontal rack transfer mechanism for transferring from the front and rear racks to the left and right racks or vice versa.

(Function) The tray moves from the open position to the intermediate position by meshing the front and rear racks with the pinion, and then the vertical and horizontal rack transfer mechanism meshes the left and right racks with the pinion instead of the front and rear racks. The member is fixed by moving the member from the intermediate position to the closed position by the cam groove of the tray, and the lateral moving member raises the turntable and the pickup unit.

(Example) The Example of this invention is described below based on an accompanying drawing.

FIG. 1 is an internal plan view of a disc player according to the present invention,
FIG. 2 is a front view of the disc player 1 and the base 2 of the disc player 1.
A pinion 3 is rotatably supported at the front part (lower part in FIG. 1) of the motor, and the pinion 3 is normally and reversely rotated by a motor 4, a pulley 5, a belt 6 and a gear train 7 (FIG. 2).

As shown in FIG. 3 which is a sectional view (schematic diagram) taken along the line III-III of FIG. 1, the lifting table 8 is locked to the base 2 via the pin 8a. A turntable 9 and an optical pickup unit 10 (FIG. 1) are attached to the lifting table 8.

Further, the lifting table 8 swings as shown by an arrow when the boss 8b on the side opposite to the pin 8a is fitted into a cam groove described later and moves, and as shown in FIG. Is.

A tray 11 is attached to the upper part of the base 2 so as to be able to move forward and backward. The direction in which the tray 11 is stored in the disc player 1 is referred to as "forward", and the direction in which the tray 11 is pulled out is referred to as "backward".

4 is a plan view of the tray, FIG. 5 is a sectional view taken along line VV of FIG.
FIG. 6 is a bottom view of the tray.

The tray 11 is a plastic injection molded product, in which a large circular recess 11a and a small circular recess 11b are concentrically provided, and a cutout hole 11c for tracing an optical pickup is formed.

On the other hand, a front and rear rack 12, a cam groove 13 and a stopper piece 14 are provided on the back surface of the tray 11 as shown in FIG.

In the vicinity of the pinion 3 in FIG. 1 is a lateral movement member 15 that moves up and down the turntable 9 and the optical pickup unit 10.

This lateral movement member 15 is attached to the base 2 so as to be horizontally movable only in the left-right direction, has a left-right rack 16 at the right end, is movable in the left-right direction within the range of the long hole 17, and has a boss on the upper surface.
18 is erected and is urged by a spring 19 to the right in the figure. Further, as shown in FIG. 2, a falling wall 20 hangs down on the laterally moving member 15, and a cam groove 20a composed of a horizontal portion, an inclined portion, and a horizontal portion is formed in the wall 20. The boss 8b of the lifting table 8 is fitted in the cam groove 20a.

A vertical and horizontal rack connecting mechanism 22 is further provided near the pinion 3 in FIG. The vertical / horizontal rack connecting mechanism 22 is arranged in the vicinity of the intersection of the front and rear racks 12 and the left and right racks 16 and has a function of transferring the pinion 3 from one of the racks 22, 16 to the other.

FIG. 7 is an exploded view of the vertical / horizontal rack connecting mechanism. The vertical / horizontal rack connecting mechanism 22 has a sickle-shaped lever 23 as a main component, and the base of the sickle-shaped lever 23 is fitted to a shaft 24 on the base side to form a sickle-shaped lever. A semi-cylindrical boss 25 is provided at an intermediate portion of 23, and a cylindrical boss 26 is provided at a tip end of the sickle-shaped lever 23.

The cylindrical boss 26 is a back plate 15a attached to a substantially lower surface of the left and right racks 16 of the lateral movement member 15 at a position where it does not interfere with teeth.
Is fitted in the cam groove 15b.

The sickle lever 23 is arranged below the pinion 3.

The operation of the disc player having the above structure will be described below.

In FIG. 1, the disc is placed on the tray 11 which is pulled out to the front and the operation switch is pushed. The pinion 3 rotates counterclockwise by driving the motor 4, and the tray 11 moves forward (from the bottom to the top of the figure).

Then, the stopper piece 14 on the lower surface of the tray 11 comes close to the waiting semicircular boss 25 (arrow).

FIGS. 8 (a) to 8 (d) are explanatory views of the operation. As shown in FIG. 8 (a), the stopper piece 14 of the tray starts to push the semicylindrical boss 25 of the sickle lever. This allows the sickle lever 23
Starts to rotate counterclockwise about the shaft 24, and as a result, the cylindrical boss 26 starts to push the lateral movement member 15 to the left along the cam groove 15b.

Fig. 8 (b) shows the front and rear racks when the pinion 3 is rotated counterclockwise.
Shows when 12 has moved enough. Subsequently, the sickle lever 23 rotates counterclockwise, and the arc motion of the sickle lever 23 pushes the lateral moving member 15 to the left, and the boss 18 on the upper surface of the lateral moving member 15 starts to enter the cam groove 13 on the lower surface of the tray 11.

What is important is that when the lateral movement member 15 moves to the left, the left and right racks 16 of the lateral movement member 15 start to bite on the pinion 3, and the left and right racks 16 start to bite immediately before the front and rear racks 12 slip out of the pinion 3 in the figure. This means that the so-called vertical and horizontal rack connections have been made.

In FIG. 8 (C), the tray 11 has front and rear racks 12 separated from the pinion 3, so that the cam groove on the bottom surface of the tray 11 will be used in the future.
The slanted portion 13a of 13 is brought into sliding contact with the boss 18 of the lateral movement member 15 for final movement.

The lateral movement member 15 actively moves to the left due to the meshing of the pinion 3 and the left and right racks 16.

Then, as shown in FIG. 8 (d), since the boss 18 of the lateral movement member 15 only moves to the parallel portion 13b of the cam groove 13 of the tray, the tray 11 is locked and held at the so-called play position without moving forward and backward. It

In addition, the cylindrical boss 26 of the sickle-shaped lever 23 was previously a lateral movement member.
I was pushing 15, but this time conversely the lateral movement member 15
It is pushed by one side 15c of the cam groove 15b and rotates counterclockwise.
A little away from. Therefore, although the tray 11 is initially positioned by the stopper piece 14, the positioning is finally performed by fitting the parallel portion 13b of the cam groove 13 of the tray 11 and the boss 18 of the lateral movement member 15. .

On the other hand, in FIG. 2, the boss 8b of the elevating table 8 fitted to the falling wall 20 of the lateral movement member 15 is the imaginary line because the lateral movement member 15 moves to the left as described above. Ascending to the position shown, the disc 27 on the tray 11 is scooped up by the turntable 9 thereof as shown by the solid line in FIG. 3 to prepare for play. The play is carried out by the cooperation of the high speed rotation of the disk 27 and the trace of the optical pickup unit 10 shown in FIG.

Ejection of the disc after playing is smoothly performed by the reverse procedure of the above description.

As described above, in the disc player of this embodiment, since the final tray is fixed by fitting the tray cam groove and the lateral movement member, there is no rattling and stability.

Although the back plate 15a is attached to the lateral movement member 15 in this embodiment, the present invention is not limited to this, and the cam groove 15b may be directly formed on the lower surface of the lateral movement member 15 to reduce the number of parts.

(Advantages of the Invention) As described above, according to the present invention, the disc can be placed in the circular recess of the tray, which makes the operation extremely easy, and since the tray does not include movable parts such as claws and levers. Since it is simple and lightweight, the load on the drive system components for the tray is lightened, and therefore, the present invention can reduce the size of the disc player.

[Brief description of drawings]

FIG. 1 is an internal plan view of a disc player according to the present invention,
2 is a front view of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 1, FIG. 4 is a plan view of the tray, and FIG. 5 is V of FIG.
-V line sectional view, FIG. 6 is a bottom view of the tray, FIG. 7 is an exploded view of a vertical and horizontal rack transfer mechanism, FIGS. 8 (a) to 8 (d) are operation explanatory views, and FIG. 9 is a conventional disk. A schematic sectional view of the player, FIG. 10 is a bottom view of FIG. 1 ... Disc player, 2 ... Base, 3 ... Pinion, 9 ... Turntable, 10 ... Optical pickup unit, 11 ... Tray, 12 ... Front / rear rack, 13 ... Cam groove, 15 ... Side Moving member, 16 …… left and right rack, 22 …… longitudinal and horizontal rack transfer mechanism, 27 …… disc.

Claims (1)

[Claims] 1. A base provided with a pinion that rotates forward and backward,
A turntable and an optical pickup equipped with a tray on which the disc is mounted so as to be able to move forward and backward, on which a disc is placed, a front and rear rack and a cam groove attached to the tray, and a left and right rack which is supported on the base so as to be movable in the left and right directions. It consists of a horizontal moving member for lifting and lowering the unit, and a vertical and horizontal rack transfer mechanism for connecting racks that are placed near the intersection of the front and rear racks and the left and right racks and mesh with the pinion from the front and rear racks to the left and right racks or vice versa. , The tray moves from the open position to the intermediate position by the meshing of the front and rear racks with the pinion, and then the vertical and horizontal rack transfer mechanism meshes the left and right racks with the pinion instead of the front and rear racks. The tray moves along the cam groove of the tray from the intermediate position to the closed position and is fixed. And a pickup unit that raises a pickup unit.