JP3511924B2 - Disc loading device - Google Patents

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 used for a disc driver for reproducing a compact disc (CD) or the like.

[0002]

2. Description of the Related Art Heretofore, a loading device of this type has placed a disc on a tray that can be opened and closed with respect to the main body of the playback device, and loaded (loading) the disc by opening and closing the tray. Chucking is performed in order to drive the rotation with the loaded. There is known a disk device that uses a cam slider mechanism that uses a motor as a drive source for performing such a disk chucking operation (see, for example, Japanese Utility Model Laid-Open No. 4-72342). Further, there is one in which a gear for transmitting a motor driving force is switched during the operation so that the tray can be opened / closed (disk loading) and the disk chucked by one motor drive.

[0003]

However, in the conventional disc apparatus as disclosed in the above publication, it is necessary to provide a motor and a drive mechanism for loading separately from the mechanism for chucking the disc,
In addition, a mechanism for locking the disc when the loading of the disc is completed is required separately, which complicates the configuration, complicates the assembly, and increases the number of parts.
The cost was high. Further, the above-mentioned one motor capable of loading and chucking a disk has a problem that it is likely to cause a failure because the drive transmission gear is transferred. Furthermore, in order to detect the completion of loading and chucking, detection switches are conventionally arranged respectively, and the wiring for them is complicated.

The present invention solves the above problems,
The loading of the disc by opening and closing the tray on which the disc is placed and the chucking operation for rotationally driving the disc are realized with one drive source and a simple mechanism, and the assembly is easy and the number of parts is small and the cost is low. An object of the present invention is to provide a disk loading device that can be manufactured and has few failures. Further, by making it possible to detect the completion of loading and chucking by one detection means in common, the wiring is not complicated, and like the above, the assembly is easy, the number of parts is small, and the disk can be manufactured inexpensively. An object is to provide a loading device.

[0005]

In order to achieve the above-mentioned object, the invention according to claim 1 drives a tray which is openable and closable with respect to a main body chassis, and a disc mounted on the tray. In a disk loading device for loading or unloading into the main body, a rack and a guide groove are provided on the back surface of the tray, a cam holder is provided on the chassis main body side, and gear wheels are provided on the cam holder, respectively. A reproducing unit having a turntable for chucking and rotating the disc by a lifting operation is coupled to an inclinable or movable arm member, and a follower of the arm member is engaged with a cam of the cam holder to attach to the rack. The gear gear is engaged, and the boss of the cam holder is engaged with the guide groove, so that the drive of the motor is transmitted to the gear gear. The tray is opened and closed through the rack that is engaged with the gear wheel, and after the tray is closed, the motor is driven by the cam holder through the gear wheel. Transmitted to
The arm member is tilted or moved through the follower engaged with the cam to move the reproduction unit up and down, and is provided on the back surface of the tray.
The rack and guide groove extend linearly in the opening and closing direction of the tray.
Area, the area curved in an arc shape at the front end and the rear
And a region that is bent at the end,
Has at least two cam holders engaged with each other
A rotary shaft is supported on the top of the
Drive is transmitted and other gears are engaged with the rack
It is also a planetary gear as well as
The engagement position of the boss of the cam holder is a straight line of the guide groove.
When approaching a curved or bent area from the area,
The movement of the tray is suppressed and the motor drive is
It is transmitted to the side of the cam holder via the gear gear that serves as a star gear.
And the cam holder is configured to be driven to rotate.
It is what has been .

In the disk loading device described above, the drive of the motor is transmitted to the gear gear, and the tray is opened and closed via the rack engaged with the gear gear.
When the tray is closed from the open state and the operation is completed, that is, the loading is completed, the drive of the motor is transmitted to the cam holder without transferring the gear wheel. As a result, the arm member is tilted or moved via the follower engaged with the cam, the reproducing unit is moved upward, and thereby the chucking operation of the disc is performed. Further, when the tray is operated from the closed state to the open state, the chucking operation of the disc is released by driving the motor in the reverse direction to the above, and the tray is shifted to the open state. Thus, the loading and chucking of the disk can be performed in a series of operations by one motor and a simple drive transmission mechanism.

[0007]

In the disk loading device described above, the drive of the motor is transmitted to the other gear gear engaged with the rack via one gear gear, and thereby the cam engaged with the guide groove of the tray. While the boss of the holder is located in the linear region of the guide groove, the tray is linearly driven to open and close. In the tray closing operation, the movement of the tray is locked when the boss enters the curved area at the front end of the linear area of the guide groove, so that the latter gear gear itself is also prevented from rotating, and as a result, transmission to that gear gear is performed. The driving force of the driven motor causes the cam holder itself to rotate. That is, the cam holder is rotationally driven and the gear gear operates as a planet gear. At this time, the boss of the cam holder moves along the arcuate curved region of the guide groove, and at the same time,
The gear gear moves along the arcuate curved region of the rack, that is, revolves around the former gear gear.

The invention according to claim 2 is the same as claim 1.
Motor drive in loading device for loaded disc
Is transmitted to the gear wheel and cam holder,
Opens and closes the tray and moves the playback unit up and down.
Disc, chuck the disc, and open the tray.
When the work is completed and the chucking operation of the disc is completed
The cam holder rotates to a predetermined position,
The tray opening operation by detecting the
The completion and the chucking operation of the disc are recognized .

In the disk loading device, the motor is driven to open / close the tray via the gear wheel and the cam holder, and the disk chucking operation is performed. When the tray opening operation is completed and the disk chucking is performed. When the operation is completed, the movement of the cam holder is used to detect each operation completion operation by one detecting means. Therefore, it is not necessary to provide a separate detecting means for each operation detection. There is no need to bother with the signal wiring.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk loading device according to an embodiment of the present invention will be described below with reference to the drawings. 1 to 3, a disc loading device 1 drives a tray 2 which is opened and closed by a guide (not shown) with respect to a main body chassis to open and close, and a disc mounted on the tray 2. Is loaded or unloaded into the main body. Tray 2
Has a rack (gear) 21 and a concave guide groove 2 on its back surface.
2 and are provided. Below the tray 2, a hinge type lift arm (arm member) 3 which is supported by a main body chassis by a shaft 31 and can be tilted (or moved) is arranged. A rubber damper 32 is interposed in the lift arm 3. hand,
A playback unit (not shown) having a turntable 5 and a pickup for chucking and rotating the disc by an ascending / descending operation is connected. The tray 2 has an opening 23 through which the turntable 5 can be seen.

A main board 4 and a rotatable cam holder 10 are provided on the bottom surface of the chassis body.
The main board 4 is provided with a drive motor 6 and a three-point lever switch (detection means) 13 for detecting completion of operation. In addition, a chuck disk for chucking a disk is arranged between the turntable 5 and a bridge-shaped member (not shown) extending from the chassis body above the tray 2.

The follower 33 of the lift arm 3 is engaged with the cam 103 of the cam holder 10, the boss 102 of the cam holder 10 is engaged with the guide groove 22 of the tray 2, and the cam holder 10 is engaged with the guide groove 22. Among the gear gears 11, 12 supported and engaged with each other, the gear gear 12, which also operates as a planet gear, is engaged with the rack 21 of the tray 2 so that the tray 2 can be opened and closed. The drive of the motor 6 is transmitted to the geared pulley 9 via the motor pulley 7 and the belt 8, and the drive of the geared pulley 9 is transmitted to the gear gear 11. After the tray 2 is closed (stored), the motor 6 is driven by the gear 1
The lift arm 3 is tilted (or moved) via a follower 33 that is transmitted to the cam holder 10 via the followers 33 that are engaged with the cam 103, and the playback unit is moved up and down.

The structure of the cam holder 10 will be described with reference to FIGS. 4 and 5. A cam 103 is provided on the peripheral surface slightly off the center of rotation, and a boss 102 and a guide boss 109 are provided on the upper surface off the center of rotation. A concave portion 104 for supporting the gear gear 11 is formed on the center upper surface, and a convex portion 105 for supporting the gear gear 12 is formed on the upper surface off the center. Further, contact surfaces 106 and 107 for contacting the contact 13a of the three-point lever switch 13 for detecting the rotation of the cam holder 10 are provided.

Further, the rack 21 and the guide groove 22 provided on the back surface of the tray 2 have a region extending linearly in the opening / closing direction of the tray 2 and a region L curved in an arc shape at the front end thereof.
And a region K bent at the rear end, the gear gear 12 is engaged with the rack 21 and is a planetary gear,
The boss 10 of the cam holder 10 is moved by opening and closing the tray 2.
When the engaging position of 2 approaches the curved or bent region of the guide groove 22 from the linear region, the movement of the tray 2 is restrained, and the drive of the motor 6 is performed by the cam holder via the gear gear 12 serving as the planet gear. 10 is transmitted to the cam holder 10, and the cam holder 10 is rotationally driven.

Further, when the opening operation of the tray 2 is completed and the chucking operation of the disc is completed, the cam holder 10 is rotated to a predetermined position, and the tray 2 is detected by the three-point lever switch 13. The opening operation completion and the disk chucking operation completion are recognized.

The operation of the disk loading device constructed as described above will be described. The drive of the motor 6 is transmitted to the gear gear 12, and the tray 2 is moved through the rack 21 engaged with the gear gear 12. Open and close drive. And
When the tray 2 is closed from the open state and the operation thereof, that is, the loading is completed, the drive of the motor 6 is transmitted to the cam holder 10 without transferring the gear wheel as in the conventional case. Therefore, the lift arm 3 is tilted (or moved) through the follower 33 engaged with the cam 103, and the reproducing unit is moved upward, so that the disk chucking operation is performed. When the tray 2 is operated from the closed state to the open state, the motor 6
By reversely driving the above, the chucking operation of the disc is released, and the tray 2 shifts to the open state. The arrow attached to the drive transmission mechanism in FIG. 1 indicates this case. Thus, using one motor 6 and a simple drive transmission mechanism, loading and chucking of the disk can be performed in a series of operations. The above operations can be automatically performed by operating a switch (not shown).

More specifically, the drive of the motor 6 is transmitted to the gear gear 12 engaged with the rack 21 via the gear gear 11, and the boss of the cam holder 10 engaged with the guide groove 22 of the tray 2. While 102 is located in the linear region of the guide groove 22, the tray 2 is linearly driven to open and close.
In the closing operation of the tray 2, when the boss 102 enters the curved region L at the front end of the linear region of the guide groove 22, the movement of the tray 2 is locked, and thus the gear gear 12 itself is also prevented from rotating, which causes The driving force of the motor 6 transmitted to the gear gear 12 causes the cam holder 10 itself to rotate, and the cam holder 10 is rotationally driven so that the gear gear 12 operates as a planet gear. At this time, the boss 102 of the cam holder 10 moves along the arcuate curved region L of the guide groove 22, and at the same time, the gear gear 12 revolves around the gear gear 11 along the arcuate curved region L of the rack 21. When the boss 102 reaches the final end of the guide groove 22, the movement is stopped, and in that state, the tray 2 is locked and cannot be removed.

Furthermore, when the opening operation of the tray 2 and the chucking operation of the disk are completed, the cam holder 1 is
By utilizing the fact that 0 rotates in the opposite directions by a predetermined amount, each operation completion operation is detected by the contact 13a of the three-point lever switch 13, so that a detection means is individually provided for each operation detection. There is no need, and there is no need to bother with the signal wiring from the detection means. The present invention is not limited to the configuration of the above embodiment, and various modifications can be made. For example, the lift drive mechanism of the reproduction unit by the lift arm 3 can adopt various modifications.

[0020]

As described above, according to the first aspect of the present invention, the drive of the motor is transmitted to the gear gear, or is transmitted to the cam holder via the gear gear, whereby the tray opening / closing operation, that is, the loading of the disc is performed. Since the disk chucking operation is performed following the operation, the above-described series of operations can be obtained by using one drive source and a simple drive transmission mechanism, which is easy to assemble, requires a small number of parts, and is an inexpensive disk. A loading device is obtained. Also, since there is no transfer of gears as in the past,
There are few breakdowns.

Further, by using the linear region and curved in an arc-like region of the guide groove provided in the tray, the driving of the motor, the tray is opened and closed moved by driving the gear wheel itself, or the planet gears the gear wheel Since the cam holder itself is rotated by performing the above operation, the series of operations described above can be smoothly performed without causing the gear gears to transfer.

According to the second aspect of the invention, the completion of the opening operation of the tray, that is, the completion of the loading of the disk and the completion of the chucking are combined and detected by one detecting means. Compared to the case where the detecting means is individually provided, the number of parts is small, wiring and assembly are easy, and the manufacturing cost is low.

[Brief description of drawings]

FIG. 1 is a plan view of a disc loading device according to an exemplary embodiment of the present invention.

FIG. 2 is a front side view of the same.

3A is a rear view of the tray, FIG. 3B is a sectional view taken along line AA of FIG. 3A, and FIG. 3C is a sectional view taken along line BB of FIG.

4A is a plan view of a cam holder, and FIG. 4B is a side view of the same.

5A is a sectional view taken along line CC of FIG. 4A, and FIG.
4A is a cross-sectional view taken along the line DD of FIG. 4A, and FIG.
FIG.

[Explanation of symbols]

1 Disk loading device 2 trays 21 racks 22 Guide groove 3 Lift arm (arm member) 6 drive motor 10 cam holder 102 boss 103 cam 11,12 gears 13 3-point lever switch (detection means) 33 Follower L arcuate curved area K bending area

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI G11B 17/035 G11B 17/035

Claims (2)

(57) [Claims] 1. A disk loading device for driving a tray, which is openably and closably provided with respect to a chassis of a main body, to load or unload a disk placed on the tray into the main body. A playback unit having a turntable that has a rack and a guide groove on the back side of the chassis, a cam holder on the chassis body side, and gear wheels on the cam holder, and that chucks and rotates the disc by raising and lowering it. Is coupled to a tiltable or movable arm member, a follower of the arm member is engaged with a cam of the cam holder, the gear gear is engaged with the rack, and a boss of the cam holder is provided in the guide groove. The drive of the motor is transmitted to the gear gear, and the train is transmitted through the rack engaged with the gear gear. After opening and closing the tray, and after the tray is closed, the drive of the motor is transmitted to the cam holder through the gear gear and the follower is engaged through the cam. the arm member tilting or moving the said is a playback unit which raises and lowers operating, the rack and the guide groove provided on the back surface of the tray, said
Area that extends linearly in the tray opening and closing direction and its front end
Areas that are curved in an arc shape and areas that are bent at the rear end
At least two of the gears are engaged with each other.
A rotary shaft is supported on the cam holder, and one of them is a gear tooth.
The drive of the motor is transmitted to the car, and the other gears are
And a planetary gear, and the opening and closing movement of the tray causes the boss of the cam holder to move.
The engagement position is curved or bent from the linear area of the guide groove.
The movement of the tray is restrained when approaching the area.
And the motor drive is a planetary gear.
Is transmitted to the cam holder side via the
A disk loading device characterized by being configured to be rotationally driven . 2. A motor driven gear gear and cam holder.
More it is transmitted to, and opening and closing the tray, or
Also, the playback unit is moved up and down to check the disc.
The tray, and when the opening operation of the tray is completed,
When the king operation is completed, the cam holder reaches the specified position.
Rotating motion and detecting it by one detecting means
Tray open operation and disk chucking operation
The disk loading device according to claim 1, wherein completion is recognized .