JPH05128691A - Disk reproducing device - Google Patents

Abstract

PURPOSE:To enable to stably and surely clamp a disk without using an electromagnet by providing a clamper member on a disk tray and also providing a clamper spring on a tray guide. CONSTITUTION:The clamper member 33 being lifted on an upper plate 24a of the disk tray 24 by a turn table 11 via the disk 13 on the disk tray 24 at the time of reproduction, is provided and also the clamper spring (a leaf spring) is provided on a tray guide. With this configuration, one edge part of the leaf spring 39 is being abutted on an upper part of a housing body (a device frame) and is elastically deformed and is parted the other edge side from the clamper member 33. Hence the disk tray 24 moves smoothly without suffering hindrance of the clamper member 33. Also since the elastic deformation of the leaf spring 39 is released in the reproducing state, the leaf spring 39 is pressed the clamper member 33 to the disk side by the elastic force, thus the disk is surely clamped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc reproducing apparatus provided with a disc clamp mechanism having a simple structure capable of mounting a disc on a turntable in a stable and reliable manner.

[0002]

2. Description of the Related Art Recently, a disc reproducing apparatus for optically reading and reproducing information recorded on a CD (compact disc) has become popular. In this type of disc player,
In particular, in the system using the disc tray, the disc tray, which is generally pulled out from the apparatus body and on which the CD is placed, is pulled into the apparatus body, and then the disc tray is lowered to the turntable side, The CD on the tray is centrally aligned and set on the turntable. At this time, by mounting the clamper member from above, the CD is sandwiched between the clamper member and the turntable. ing.

[0003]

By the way, in order to ensure the clamping and fixing of the CD on the turntable by the clamper member, conventionally, the attraction force of the electromagnet has been generally used exclusively. However, such a magnet clamp system has a problem that its structure becomes large-scale.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to easily, stably and surely turn without using a large-scale disc clamp mechanism using an electromagnet or the like. An object of the present invention is to provide a disc reproducing apparatus having a mechanism for clamping a disc on a table.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a tray guide is provided in a housing in which a turntable driven to rotate by a motor is incorporated so as to be movable in the axial direction of the turntable with respect to the housing. According to a reproducing device for providing a disc tray movably in a direction orthogonal to the axial direction on the tray guide and transferring a disc placed on the disc tray onto the turntable to reproduce information, On the top plate of the tray, in relation to the axial approaching movement of the tray guide and the turntable with respect to each other in the axial direction, the tray is lifted by the turntable via the disc on the disc tray and separated from the disc tray together with the disc. Supporting the clamper member, and the tray guide is attached to the tray guide. When it is separated from the table, one end of the tray guide is brought into contact with the upper part of the housing to elastically deform so that the other end side is separated from the clamper member, and the tray guide is brought close to the turntable together with the disc. When the clamper member is lifted, a plate spring is provided at the other end side for pressing and urging the clamper member toward the disk surface side.

[0006]

According to the above-described structure, the tray guide and the turntable are close to each other and apart from the clamper member due to the elastic deformation of the leaf spring, except in the reproducing state in which the turntable lifts the clamper member together with the disc. Therefore, there is no pressing bias of the clamper member in the disc direction by the leaf spring, and therefore the disc tray movably supported by the tray guide is in the direction orthogonal to the axial direction of the turntable without being hindered by the clamper member. Move smoothly. Moreover, in the reproducing state, since the elastic deformation of the leaf spring is released, the leaf spring presses and urges the clamper member toward the disc side by its elastic force. The disc is securely clamped and fixed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a disc reproducing apparatus according to the present invention. In FIG. 1, reference numeral 1 is an apparatus frame (housing),
It comprises a top plate 2, side plates 3 and 4, and a rear end plate 5. Inside the device frame 1, a device substrate 6 is suspended vertically via a cushioning member 7 such as a coil spring (see FIG. 3). The shock applied to the device frame 1 is relieved by the buffer member 7 and is not transmitted to the device substrate 6 in the disc reproducing state.

Engagement protrusions 8 are formed on the lower edges of the front ends of both sides of the device substrate 6.
Are provided (see FIGS. 2 and 4), and these engaging protrusions 8 are provided.
Is engageably and disengageably engaged in a planar substantially triangular guide hole 10 formed in a projecting piece 9 projecting inwardly at a right angle to the lower edges of the front ends of both side plates 3 and 4 of the apparatus frame 1. To do. These engaging projections 8 are guided through the guide holes 10 except when the disc is being reproduced.
By engaging with the inside, the device substrate 6 is pushed into the inner part of the device frame 1 as shown in FIG. 4 (A), and the tray guide 16 described later is pressed against the top plate 2 side of the device frame 1. The device substrate 6 and the tray guide 16 are held and fixed in the device frame 1.

A tray guide 16 is provided between the top plate 2 of the apparatus frame 1 and the apparatus substrate 6 as shown in FIG. The tray guide 16 is attached with mounting brackets 17 and 18 at the rear end portions on both sides to mounting brackets 19 and 20 at the rear end portions on both sides of the device substrate 6 via pins 21 so that an arrow is drawn to the device substrate 6. It is provided so as to be rotatable in the C and D directions. The device substrate 6 and the tray guide 16
Are urged in a direction in which they approach each other by a wire spring 7a that is stretched around the front end portion thereof.

In the guide grooves 22 and 23 on both sides of the tray guide 16, a flat box-shaped disc tray 24 on which the disc 13 is placed is provided at a disc reproducing position and a disc inserting / removing position as shown in FIG. It is mounted so as to be reciprocally movable in the directions of arrows E and F.

On the device substrate 6, the turntable 11 which is rotated by the turntable driving motor 11a.
Is provided. Figure 5 on this turntable 11
As shown in (B), a disk 13 which is a recording medium is placed and rotates integrally with the turntable 11. Further, the device substrate 6 is equipped with a pickup 14 which optically reads information recorded on the information recording surface of the disk 13 which is placed on the turntable 11 and rotated. The pickup 14 is supported by a guide shaft and reciprocated in directions A and B (radial direction of the disk 13) by a pickup movement control motor 15 which is rotationally controlled in forward and reverse directions.

The partly toothless gear 2 which is rotated by selectively transmitting the force of the pickup movement control motor 15 to the device substrate 6.
7 is rotatably provided. The tooth-chipped gear 27 has a tooth-chipped portion 28 over a range of approximately 90 ° as shown in FIG. 3, and has an annular cam wall 29 in the central portion of the upper surface.
The upper end surface of the annular cam wall 29 is a cam surface 30, and the cam surface 30 has inclined surfaces 30a and 30b on both end sides.
And a horizontal plane 30c between the inclined surfaces 30a and 30b.
Consists of.

On the cam surface 30 of the annular cam wall 29, a substantially V-shaped engaging projection 3 is provided on the lower surface of one side of the tray guide 16.
1 slidably engages. Then, the cam surface 30 of the annular cam wall 29 is driven by the counterclockwise rotational drive of the tooth-chipped gear 27.
The clamp mechanism 32 performs the clamping operation via the tray guide 16 by the action. Further, the clamp mechanism 32 performs the unclamping operation by the clockwise rotation of the tooth-chipped gear 27.

The clamp mechanism 32 has a clamper member 33 located above the turntable 11 and facing the turntable 11. The clamper member 33 has a disk shape, and as shown in FIG. 5, an outer peripheral edge portion 33a of the clamper member 33 has a fitting hole 34 formed in the upper surface plate 24a of the disc tray 24.
Is vertically movably supported on the upper surface 34a of the peripheral edge portion of the.

Further, a gear tooth 27 is rotatably provided on the device substrate 6. As shown in FIG. 3, the tooth-chipped gear 27 has a tooth-chipped portion 28 over a range of approximately 90 °, an annular cam wall 29 at the center of the upper surface, and an outer peripheral surface above the annular cam wall 29. It has an annular cam groove.
The upper end surface of the annular cam wall 29 is a cam surface 30, and the cam surface 30 has inclined surfaces 30a and 30b on both end sides.
And a horizontal plane 30c between the inclined surfaces 30a and 30b.
Consists of. A substantially V-shaped engaging projection 31 provided on one side lower surface of the tray guide 16 slidably contacts the cam surface 30 of the annular cam wall 29.

The toothless gear 53 is driven to rotate counterclockwise by the force of the motor 15 at the completion of the disk loading operation. When the tooth-chipped gear 27 is driven to rotate in the counterclockwise direction, the clamp mechanism 32 is clamped via the tray guide 16 by the action of the cam surface 30 of the annular cam wall 29. Further, the clamp mechanism 32 performs the unclamping operation by the clockwise rotation of the tooth-chipped gear 27.

Explaining the clamp mechanism 32, the clamp mechanism 32 has a clamper member 33 located above the turntable 11 and facing the turntable 11. The clamper member 33 has a disc shape, and as shown in FIG. 5, an outer peripheral edge portion 34a thereof is supported by a peripheral edge upper surface 34a of a fitting hole 34 formed in the upper surface plate 24a of the disc tray 24. The clamper member 33 has a projection 35 formed substantially at the center of the upper surface thereof, and an annular engagement groove 36 provided on the lower surface thereof. This annular engagement groove 3
An annular engagement protrusion 12 provided on the upper surface of the turntable 11 is engaged with the turntable 6 in a disengageable manner.

That is, as the tray guide 16 descends, as shown in FIG.
As shown in (B), the bottom plate 24b of the disc tray 24
When the turntable 11 enters the disc tray 24 through the opening 37 provided in the ring engagement groove 3
The annular engaging projection 12 is engaged in the inside of the bearing 6. The outer peripheral surface of the annular engaging protrusion 36 from the substantially middle portion to the upper end side is a tapered surface 38 having a diameter gradually decreasing toward the upper end side.

The clamper member 33 is urged downward by a clamper spring (leaf spring) 39 that abuts the protrusion 35. As shown in FIG. 7, the clamper spring 39 includes a main body 39a having a substantially square planar shape, one side piece 39b formed by punching out a substantially central portion of the main body 39a in a substantially U shape, and one side of the main body 39a. The other side piece 39c having a substantially U-shaped cross section that is continuously provided at the edge portion, and the first contact piece 39d that is continuously provided at the tip of the other side piece 39c and is flush with the main body 39a.
And a second abutment piece 39e having a substantially semicircular cross section, which is continuously provided on the other side edge of the main body 39a, and a screw fitting hole 39f is formed at one end of the one side piece 39b.

One end of one side piece 39b is provided with a screw 4 on the upper surface of a pedestal 40 protruding from the upper surface of the top plate 16a of the tray guide 16.
It is fixed at 1.

This clamper spring 39 is used for the tray guide 1.
6 is in the raised position and is not clamped, the other end is brought into contact with the top plate 16a of the tray guide 16, and
As shown in (A), one end thereof is lifted up against its own spring force. When the tray guide 16 is lowered, the other end of the clamper spring 39 and the top plate 16 are
By separating from a, the substantially middle part of the clamper spring 16 is biased downward by the spring force. In this state, the approximately middle portion of the clamper spring 16 is the top plate 1 of the tray guide 16.
It is pushed into the tray guide 16 through the through hole 42 formed in 6a, contacts the projection 35 of the clamper member 33, and presses the clamper member 33 toward the turntable 11.

At this time, the disk 13 placed on the disk tray 24 is attached to the annular engaging projection 1 of the turntable 11.
The center hole 13a of the clamp 2 is fitted into the center hole 13a, so that the annular engaging projection 12 and the annular engaging groove 36 of the clamper member 33 are engaged with each other. And the clamper member 33 is
Since the disc 13 is pressed by the clamper spring 39, the disc 13 is turned on as shown in FIG.
It is sandwiched between 1 and the clamper member 33. That is,
The disk 12 is pressed and clamped on the upper surface of the turntable 11 via a clamper member 33.

The partly tooth-missing gear 27 described above operates the clamp mechanism 32 with the cam surface 30 and the V-shaped engaging projection 3 as described above.
The contact position with 1 is controlled by changing its contact position.

Next, the operation will be described.

When the disc tray 24 is at the disc insertion / removal position, the pull-out amount of the disc tray 24 from the device frame 1 is less than half as shown in FIG. 1, and the device substrate 6 and the tray guide 16 are It is in the state shown in FIG.

In this state, the bottom plate 2 of the disc tray 24
When a reproducing operation is performed after the disk 13 is radially inserted onto the disk 4b, the pickup movement control motor 15 rotates in the positive direction. The rotational force of the motor 15 is the toothless gear 27
2 is transmitted to the slide member 26, the slide member 26 performs a disc loading operation in the direction of arrow F in FIG. 2, and the disc tray 24 moves integrally with the slide member 26 in the direction of arrow F. Then, when the center of the disc tray 24 comes to a position that coincides with the center of the turntable 11, the disc loading operation is completed, the power transmission of the motor 15 to the slide member 26 is cut off, and the disc 13 is stopped at that position and the disc 13 is stopped. Is located above the turntable 11 as shown in FIG.

When the disk loading by the pulling-in of the disk tray 24 accompanying the driving of the slide member 26 is completed, the tooth-chipped gear 27 is moved to the position shown in FIG.
It is rotated in the counterclockwise direction. Then, the device substrate 6 and the disc tray 16 which have been pushed and spread against the wire spring 7a by hitting the engaging projection 31 against the horizontal surface 30c of the cam surface of the tooth-missing gear 27 until now have the missing tooth. The hole 3 through the inclined surface 30b of the engagement protrusion 31 accompanying the rotation of the gear 27
When the disk tray 16 enters the 0d, it closes each other with the engaging projection 8 of the device substrate 6 as a fulcrum, the disc tray 16 descends toward the turntable 11, and the top plate 2 of the device frame 1 as shown in FIG. 3B. Will be parallel to.

In this state, the turntable 11 provided on the device substrate 6 enters the inside of the disc tray 16, and the disc 13 is clamped on the turntable 11 by the clamper member 33 pressed by the clamper spring 39. ..

That is, the annular engagement protrusion 36 of the turntable 11 engages with the engagement groove 38 of the clamper member 33 through the center hole 13a of the disc 13, and resists the biasing force of the clamper spring 39. 13 and the clamper member 33 are slightly pushed up. By the reaction force of the clamper spring 39, the disk 13 is moved through the clamper member 33 to the turntable 11
When it is strongly pressed upward and clamped, the state shown in FIG. 5B is reached, and the turntable driving motor 11a is rotationally driven to rotate the disc 13 together with the turntable 11.

In this state, the pickup 14 moves the disc 1
While moving in the direction of arrow A from the center side of 3 toward the outer peripheral side, and being appropriately returned in the direction of arrow B, the disk 13
The information recorded on the information recording surface is optically read, and the reproducing operation of the disc 13 is performed.

When the eject operation is performed in accordance with the end of the reproducing operation of the disk 13, the pickup movement control motor 15
Is driven to rotate in the opposite direction. With this pickup 1
4 indicates an arrow B from the outer peripheral side of the disk 13 toward the center side.
Move in the direction. When the pickup 14 returns from the disc reproduction area to the initial position, the pickup 14 stops at that position and the power of the pickup movement control motor 15 is transmitted to the tooth-chipped gear 27. As a result, the toothless gear 2
By rotating 7 in the clockwise direction, the tray guide 16
The device board 6 is returned to the initial state of FIG. 3A from the state of FIG. 3B by the engagement action of the cam surface 36 and the engagement protrusion 31, and the turntable 11 of FIG. Figure 5 from the state
And the clamp of the disk 13 is released.

The disc unloading operation of the slide member 26 in the direction of arrow E moves the disc tray 24 in the direction of arrow E to the initial disc unloading position shown in FIG. It can be taken out from 24. As described above, according to the apparatus of the embodiment, the leaf spring that presses and urges the clamper member toward the disc to clamp the disc between the clamper member and the turntable is a tray guide that movably accommodates the disc tray. In the non-reproducing state in which the tray guide and the turntable are separated from each other, one end of the leaf spring of the casing that supports the tray guide movably in the axial direction of the turntable. The other end is elastically deformed, and the other end is set apart from the clamper member. Therefore, the disc spring can be stably and reliably held between the clamper member and the turntable by the action of the leaf spring when the disc is played back, and the clamper member by the leaf spring is used at the time of non-playback disc loading or disc unloading. It is possible to release the pressing force of the and smooth the operation. In addition, by the movement of the leaf spring having a very simple structure and the tray guide to which the leaf spring is attached, it is possible to easily and stably perform the disc clamping operation.

The present invention is not limited to the above embodiment. In the embodiment, the tray guide is moved up and down with respect to the housing that incorporates the turntable that is driven to rotate by the motor. However, when the housing moves up and down with respect to the tray guide, the turntable and the disc tray are moved. It may be configured to control the proximity operation with. The means for elastically deforming the leaf spring to separate it from the clamper member during unclamping can also be variously modified, for example, by providing another member for regulating the position of the operating end of the clamper member. Besides, the present invention can be variously modified without departing from the gist thereof.

[0035]

As described above, according to the disc reproducing apparatus of the present invention, the disc can be stably and reliably clamped on the turntable with a simple structure by the spring force of the leaf spring without using the electromagnet.

[Brief description of drawings]

FIG. 1 is a perspective view of a disc reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of a device substrate and a tray guide of the disc reproducing device.

FIG. 3 is a perspective view of a toothless gear of the disc reproducing apparatus.

FIG. 4 is a side view in which a part of the disc reproducing apparatus is cut away.

FIG. 5 is a vertical cross-sectional view for explaining the operation of the clamp mechanism of the disc reproducing apparatus.

FIG. 6 is a plan view showing a clamp spring of the disc reproducing apparatus.

[Explanation of symbols]

 1 Device Frame (Case) 6 Device Board 11 Turntable 13 Disc 16 Tray Guide 24 Disc Tray 24a Upper Plate 24b Lower Plate 33 Clamper Member 39 Clamper Spring (Flat Spring)

Claims (1)

[Claims] 1. A housing in which a turntable driven to rotate by a motor is incorporated, and a disk provided on the turntable so as to be movable in the housing in the axial direction of the turntable. A tray guide that moves between a reproduction position for mounting a disk and a reproduction preparation position above the tray guide, and a tray guide movably supported by the tray guide in a direction orthogonal to the axial direction. And a disc tray that moves between the disc tray and the top plate of the disc tray. A clamper member lifted by a turntable and separated from the disc tray together with the disc, and an intermediate portion on the tray guide. When the tray guide is fixedly supported and is in the reproduction preparation position, one end of the tray guide is brought into contact with the upper part of the housing to elastically deform and the other end side is separated from the clamper member, and the tray guide is A disc reproducing apparatus comprising: a leaf spring that urges the clamper member toward the disc surface at the other end side when in the reproducing position.