JPH043360A - Disk loading device - Google Patents

Abstract

PURPOSE:To move a tray and to drive a clamping means with one motor by driving the clamping means after driving a gear, a cam means, a pinion, and a rack by the driving motor to move the tray to the loading position. CONSTITUTION:When a disk is placed on the tray in the inject state with a tray part 2 advanced and a driving motor 10 is rotated, its rotation force is transmitted to a clutch gear 16 through a pulley 11, a rubber belt 13, an intermediate pulley 12, the rubber belt 13, and a gear 15. A pinion 17 is rotated, and the tray part 2 is moved in the direction of an arrow (c) through the rack, and the gear 16 is shifted to the part of a projecting stripe 15b beyond a notch 15e of the projecting stripe 15b, and a pin is disengaged from a fitting hole, and the rotation of the gear 16 is not transmitted to the pinion 17 to stop movement of the tray part 2. The motor 10 rotates the cam 15 furthermore, and a projecting part 5a is shifted to a cam groove 15c, and a clamp arm 5 falls to a prescribed position along the groove 15c, and then, a lever 18 presses a switch 19 to stop the clamping operation.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a disk loading device that moves an information recording disk to a rotational drive means, loads it, and ejects it when reading or writing of information is completed. More specifically, the present invention relates to a disc loading device in which a single motor drives a tray section on which a disc is placed and a clamp arm that clamps the disc to rotational drive means.

[Conventional technology]

For information recording discs, such as compact discs (hereinafter simply referred to as discs), which is a type of optical disc, the disc is placed on a tray in an eject state (non-loading state) of a disc drive device, and the tray is held. Rotation drive means 1 for moving the tray part into the disk drive device via the tray moving means and rotationally driving the disk
For example, the disk is clamped to a turntable directly connected to the rotating shaft of a spindle motor via a clamping means,
This allows the device to rotate together with the spindle motor and read out information via an optical pickup. In this case, in order to ensure reliable operation, motors are generally provided for driving the tray moving means and the clamping means, respectively.

[Problem to be solved by the invention]

However, if two motors are provided, one for driving the tray moving means and the other for driving the clamping means, the control is simple because the sensors can detect the operating positions of the tray moving means and the clamping means and suppress their driving. However, the cost of the motor and sensor increases.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a disk loading device in which a single motor can move the tray and drive the clamping means.

[Means to solve the problem]

This invention was made to solve the above-mentioned conventional problems, and its structural features include one drive motor, a speed reduction means for decelerating and transmitting the rotation of the drive motor, and a final speed reduction means for this speed reduction means. A first gear that meshes with the gear of the stage, a spiral protrusion that rotates concentrically with the first gear, and a spiral protrusion of about one round on the outer periphery, and a part of the clamp arm on the end surface. A disc-shaped cam means formed with a cam groove that engages and moves the clamp arm up and down; A second gear, a pin standing upright on the side of the second gear, and a rotating shaft of the second gear are loosely fitted and always biased in a direction away from the second gear, and the pin is fitted on the side. a clutch means that cuts the transmission of driving force to the pinion when the tray section has completed its movement to the loading position; and a clutch means that controls the rotation of the pinion by advancing and retracting the tray moving means. It is equipped with a rack that converts it into exercise.

[For production]

In the above configuration, the rotation of the drive motor is decelerated and transmitted from the final stage gear to the first gear, and the rotation of the first gear rotates the integrated cam means. The power is transmitted from the cam means to the first gear, and the rotation of the first gear rotates the integrated cam means. This rotation of the cam means causes the second gear of the clutch means to move forward and backward relative to the pinion. When the second gear is in the advanced state, the pin engages with the fitting hole of the pinion to rotate the pinion, and the rotation of the pinion is converted to movement of the rack, thereby moving the tray section.

During this time, the second gear that was engaged with the cam means retreats in accordance with the rotation of the cam means, and just when the tray section reaches the predetermined loading position, the engagement state of the pin with the engagement hole is released. , transmission of driving force to the pinion is cut off. This cut position is the loading position, and from this position the clamp arm is driven, clamping the disk onto the rotation drive means and rotating the disk, making it possible to read information from the disk.

Furthermore, at the time of ejection, the drive motor rotates in the opposite direction and the cam means also rotates in the opposite direction, so that the engagement relationship between the second gear and the pinion is restored in the reverse order, and the tray section moves in the ejecting direction. The disc will be ejected.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

The disk drive device according to this embodiment mainly includes a chassis 1, a tray section 2, a drive section 4, a clamp arm 5, and a drive motor 10, as shown in the plan view of FIG. has been done.

The chassis 1 is provided with a guide 3 and a drive section 4 for horizontally transporting the tray section 2. Additionally, at the rear of the chassis 1, a clamp arm 5 is provided that clamps the disc to the turntable side that is attached to the rotating shaft of the spindle motor.
An arm stud 6 is fixed to rotatably support the arm via its protrusion 5b.

As shown in FIG. 3, the tray section 2 includes a tray 7 on which a disk is directly placed upon ejection, tray arms 8, and a leaf spring 9. A recess 7a is provided in each square of the tray 7, and an end 8a of the tray arm 8 is fitted into each recess 7a, and is always elastically biased from below by a leaf spring 9 to prevent it from falling under its own weight. Supported.

The tray arms 8, 8 are rotatably supported by protrusions 2a, 2b projecting inward from the side plate 2f of the tray section 2. Each tray arm 8 has end portions 8a bent into a substantially mouth shape at both ends, and each end portion 8a has a recess 7.
a, respectively. Therefore, according to this,
The biasing force of the leaf spring 9 located at the rear is transmitted to the front portion of the tray 7 via this tray arm 8.8.

Further, a hole 7b provided perpendicularly to the tray 7 fits into the protrusion 2C of the tray portion 2, thereby regulating the direction of movement of the tray 7. This allows the tray 7 to move vertically in a horizontal state.

A recess 3a is formed in the guide 3, and a protrusion 2d protruding from the tray part 2 is loosely fitted into the guide 3, so that the tray part 2 can freely slide on the guide 3.

The drive section 4 includes a drive motor 10 and a motor 1. An intermediate boolean IJ12 that decelerates the rotation of the intermediate pulley 1J11, a final stage gear 14 that further decelerates the rotation of the intermediate pulley 12, a pulley 12a on the large diameter side of the pulley 11 and the intermediate pulley 12, and the intermediate pulley 1
Driving force is transmitted from the rubber belt 13 stretched between the pulley 12b on the small diameter side of No. 2 and the pulley portion 14a forming a part of the final stage gear 14, and the gear portion 14b of the final stage gear 14. Cam gear 15. A pinion 17 that constantly meshes with the rack 2e fixedly installed on the tray section 2. Cam gear 1
5 and a pinion 17, a clutch gear 16, a lever 18, and a switch 19.

The cam gear 15 is formed into a substantially disk shape as shown in the operational explanatory diagram of FIG. 4 and the perspective view of FIG. 6, and has a gear portion 15a and a spiral protrusion 15b formed on its outer periphery. Further, a cam groove 15c is cut into the end surface of the cam gear 15. The cam gear 15 is rotatably supported by a support plate 1a attached to the chassis 1. Gear part 1
5a is constantly engaged with the gear portion 14b of the final stage gear 14, and the driving force of the drive motor 10 is transmitted to the cam gear 15 at reduced speed. A clutch gear 16 is also constantly engaged with the gear portion 15a of the cam gear 15, and is rotationally driven by the cam gear 15.

This clutch gear 16 is rotatably supported by a support shaft 1b provided upright on a support plate 1a that supports the cam gear 15, and is engaged with a protrusion 15b of the cam gear 15 via an engagement groove 16b. The protrusion 15b is set at an advance angle of approximately half a pitch, and a notch 15e is formed at a location where the protrusion 15b intersects after going around once. The opposite ends of the notch 15e are provided with opposing sides (inner sides of each other) of the protrusions 15b.
Slopes 15f and 15g are formed so as to be directed toward .

Note that this protrusion 15b is connected to the engagement groove 16 of the clutch gear 16.
b, the clutch gear 16 is moved in the axial direction (
It can slide in the directions of arrows A and B in the figure. The clutch gear 16 is always elastically biased by a spring 20 in a direction away from the support plate 1a, and by a spring 21 in a direction away from the pinion 17. These springs 20, 21 apply elastic force so that the clutch gear 16 is located at the intermediate position shown in FIGS. 4(a) and 4(b) when the protrusion 15b and the engagement groove 16b are disengaged. It is set.

On the other hand, a pin 16a is fitted into the end surface of the clutch gear 16, and only the tip portion slightly protrudes from the end surface.

On the other hand, a fitting hole 1 into which the pin 16a can fit is provided at a predetermined location on the end surface of the pinion 17 facing the clutch gear 16.
7a is formed and the pin 16a is fitted into the fitting hole 17a, the pinion 17 rotates together with the clutch gear 16, and when the pin 16a is in the unfitted state, the pinion 17 is driven to rotate the clutch gear 16. Force is not transmitted.

The aforementioned protrusion 5a engages with the cam groove 15c of the cam gear 15, and the clamp arm 5 is reciprocated (raised and lowered) between an unclamped position and a clamped position according to the rotational position of the cam groove 15c. In this case, the cam groove 15c is formed in a groove shape so that the tray section 2 is not moved up and down during the horizontal transfer period, and the clamp arm 5 is moved up and down during the clamp operation period.

The disk loading device configured as above is
As shown in FIG. 1, when a disk is placed on the tray 7 in the ejected state with the tray section 2 extended and the play button on the disk drive device is pressed, the drive motor 10 starts rotating. The rotational force of the drive motor 10 is transmitted to the clutch gear 16 through the pulley 11, the rubber belt 13, the intermediate pulley 12, the rubber belt 13, the final stage gear 15, its gear portion 14b, and the gear portion 15a of the cam gear 15. At this time,
The clutch gear 16 and pinion 17 are in close contact with each other or close to each other as shown in FIG. 4(a), and the pin 16a is fitted into the fitting hole 17a, so the pinion 17 rotates integrally with the clutch gear 16.

As a result, the rack 2e is driven, and the tray section 2 begins to move in the loading direction (direction of arrow C in FIG. 1).

When the tray part 2b moves horizontally to a predetermined position, the fourth
From the position shown in FIG. 1A, the clutch gear 16 passes through the notch 15e of the protrusion 15b and moves from the protrusion 15b on the slope 15f side to the protrusion 15b on the slope 15g.

As a result of this transition, the clutch gear 16 moves in the direction of arrow B, the pin 16a separates from the fitting hole 17a, and the state finally becomes as shown in FIG. will no longer be transmitted. This causes the tray section 2 to move in the loading direction (horizontal movement).
stops. During this time, the protrusion 5a of the clamp arm 5 is engaged with a portion of the cam groove 15c corresponding to LD in FIG. 5. This state is shown by the one-dot chain line in FIG.

From this state, the drive motor 10 continues to rotate, and the cam gear 1
Rotate 5. Due to this rotation of the cam gear 15, the protrusion 5a moves down to the cam groove 15c corresponding to FIG. 5c, and the clamp arm 5 begins to descend along the shape of the cam groove 15c. When the cam gear 15 is lowered to a predetermined position, the protrusion 15h protruding from the side surface of the lever 1
8, and this lever 18 further pushes switch 19. Since the switch 19 is interlocked with the drive motor 10, pressing the switch 19 causes the drive motor lO
stops, and the clamping operation is completed as shown by the solid line in FIG.

When the disc has finished playing, press the eject button on the disc drive device. This causes the drive motor to start rotating in reverse, performing the opposite operation to the loading operation described above, and moving the tray section 2 to the eject position shown in Figure 1. to advance.

As described above, according to this embodiment, the engagement relationship between the protrusion 15b of the cam gear 15 and the clutch gear 16 is changed, and thereby the clutch gear 16 and the pinion 17 are reliably and smoothly connected and disconnected. This makes it possible to load the disc with one drive motor 10.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to horizontally move the tray section and clamp the disk with one motor without using a sensor.

[Brief explanation of drawings]

All the figures are for explaining the present invention in detail, and FIG. 1 is a plan view of the entire disk drive according to this embodiment in the ejected state, FIG. 2 is a side view of the same in the loading state, and FIG. FIG. 4 is an explanatory diagram showing the clutch operation, FIG. 5 is an explanatory diagram of the cam gear, and FIG. 6 is a perspective view of the cam gear. In the figure, 1 is the chassis, 2 is the tray part, 2e is the rack, 3
is a guide, 4 is a drive unit, 5 is a clamp arm, 10 is a drive motor, 11 is a pulley, 12 is an intermediate pulley, 13 is a rubber belt, 14 is a final stage gear (first gear), 15 is a cam gear (cam means) ), 16 is a clutch gear (second gear), 16a is a pin, 17 is a pinion, and 17a is a fitting hole. Patent applicant Fujitsu General Ltd.

Claims (1)

[Claims] (1) It has a tray on which an information recording disk is placed, and a tray part that supports the tray so as to be freely advanced and retracted between a non-loading position and a loading position, and the information recording disk is connected to a disk rotation drive means. A disk loading device that enables recording and/or reproduction of information by loading the disk and further clamping it onto the disk rotation drive means via a clamp arm, the disk loading device includes one drive motor and a drive motor that decelerates the rotation of the drive motor. a first gear that meshes with a final stage gear of the first gear; and a first gear that rotates concentrically and integrally with the first gear;
A disc-shaped cam means having a spiral protrusion of almost one circumference formed on the outer periphery, and a cam groove formed on the end surface of which a part of the clamp arm engages and moves the clamp arm up and down. , a second gear that engages with the cam means and advances or retreats from the side surface of the cam means in accordance with the rotation of the second gear; a pin provided upright on the side surface of the second gear; It includes a pinion that is loosely fitted on the rotating shaft and is always biased in a direction away from the second gear, and has a fitting hole formed in the side surface into which the pin can fit, and the tray part completes movement to the loading position. A disk loading device comprising: a clutch means that cuts off the transmission of driving force to the pinion when the tray is moved; and a rack that converts the rotation of the pinion into advancing and retracting motion of the tray moving means.