JPH10208347A - Shutter driving device for recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shutter driving device capable of opening and closing a shutter in accordance with the movement of a tray with a simple structure without applying a load to the tray. SOLUTION: An A-slider 11 is driven to slide in a prescribed direction by a motor 24. The movement of the A-slider 11 is converted via a cam groove formed in a C-slider 13 and a projecting part 121 of a B-slider 12 engaged with the cam groove into the movement of the shutter 132 for opening and closing an inserting hole 141, and is transmitted to the C-slider 13. Moreover, the movement of the A-slider 11 is converted via a can groove formed in the A-slider 11 and a projection 26a of a supporting part 26 engaged with the cam groove into driving force for clamping and unclamping a disk 31, and is transmitted to a turntable 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter driving device for opening and closing an insertion opening of an information recording medium of a recording / reproducing apparatus.

[0002]

2. Description of the Related Art Generally, a tray loading type recording / reproducing apparatus is provided with a mechanism in which an extruded tray pushes a shutter open. For example, as shown in FIGS. 5 and 6, a shutter 52 is supported by a rotating shaft 53 near an insertion port of a front panel of the recording / reproducing apparatus, and is urged by a spring in a closing direction. As shown in FIGS. 6A to 6D, when the tray 51 is pulled out, the shutter 52 is pushed by the tray 51, and the shutter 52 opens in a circular motion. Tray 51
Is pushed out to a position where the information recording medium can be taken in and out against the urging force of the shutter 52.

Japanese Patent Laid-Open No. 8-129815 discloses a recording / reproducing apparatus having a mechanism for opening and closing a shutter up and down. In this recording / reproducing apparatus, the shutter opens and closes vertically by abutting a tray against a pressing roller connected to the shutter and pushing down a pressing lever.

[0004]

However, in a mechanism in which the tray directly pushes and opens the shutter, since the shutter is urged by a spring, a load is applied to the tray when the shutter is pushed and opened. Further, since the operation of the shutter is limited to an arc motion about the rotation axis, the degree of freedom in designing the recording and reproducing apparatus including the panel is limited. Furthermore, it is difficult to lock the shutter when the shutter is closed, and a locking mechanism must be added to lock the shutter.

In the mechanism for opening and closing the shutter up and down, the load of the pressing roller and the pressing lever is directly applied to the tray. Further, since the structure of the shutter driving device becomes complicated, assembly accuracy is required, and the assembly operation becomes difficult. Further, a locking mechanism must be added to lock the shutter.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a shutter driving device of a recording / reproducing apparatus which can open and close a shutter in accordance with the movement of a tray without applying a load to the tray. Aim. Another object of the present invention is to provide a shutter drive device of a recording / reproducing device which has a simple structure and can easily lock a shutter.

[0007]

According to a first aspect of the present invention, there is provided a shutter driving apparatus for a recording / reproducing apparatus, comprising: a shutter for covering an insertion opening of a tray supporting an information recording medium; In a recording / reproducing apparatus that opens and closes the insertion slot by sliding the slider in conjunction with the movement of the tray, a first slider slidably held in a predetermined direction that does not hinder the movement of the tray. A second slider provided with the shutter and slidably held in the opening and closing direction of the shutter, and converting the movement of the first slider into a movement of the shutter for opening and closing the insertion port, and In accordance with the first cam transmitting to the second slider and the movement of the tray,
And a drive unit for driving the first slider to slide in the predetermined direction.

In this shutter drive device, the first slider is slid by the drive unit in accordance with the movement of the tray, whereby the second slider is slid via the first cam, and the shutter is moved by the shutter. It has a structure to open and close the insertion slot. Therefore, the structure is simple. Further, no impact or load is applied to the tray for opening and closing the shutter.

A clamp means for clamping and unclamping the information recording medium and a movement of the first slider are converted into a driving force for clamping and unclamping the information recording medium and transmitted to the clamp means. Second
May be arranged.

According to this structure, the movement of the shutter and the driving force for clamping and unclamping of the information recording medium are both generated from the movement of the first slider, so that the structure is simple.

The first cam is formed on, for example, a protrusion formed on one of the first slider and the second slider, and formed on the other of the first slider and the second slider. And a cam groove with which the projection is engaged. The second cam is, for example, the first cam.
And a cam groove formed on the other of the first slider and the clamp means and engaged with the protrusion.

The protrusion and the cam groove of the first cam have a size and a shape in which a gap is formed between the inner edge of the cam groove and the protrusion when the shutter closes the insertion opening. It is desirable that each be formed.

According to this structure, when the shutter is closed, the inner edge of the cam groove of the first cam and the projection of the first cam are not in contact with each other. Are separated. For this reason, a shock or the like to the panel is not directly transmitted to the first slider or the like, and a device resistant to an external shock can be provided.

The cam groove of the first cam is provided in the second cam.
An end extending in a direction substantially perpendicular to the sliding direction of the slider, wherein the protrusion of the first cam is provided with the end of the cam groove when the shutter closes the insertion opening. It is desirable to be configured to engage. With such a configuration, when an external force is applied to the shutter in a state where the shutter closes the insertion port, the movement of the protrusion is restricted by the side wall of the end of the cam groove, Lock the shutter. Therefore, there is no need to provide a separate lock mechanism.

Further, the shutter driving device of the recording / reproducing apparatus according to the second aspect of the present invention slides a shutter covering an insertion opening through which an information recording medium enters and exits in synchronization with the movement of the information recording medium. A shutter driving device for a recording / reproducing device that opens and closes the insertion opening; a movable member; a driving unit that drives the movable member in first and second directions that do not hinder movement of the information recording medium; A slider having a shutter, and the movement of the movable member in the first direction is converted into a movement of the shutter to open the insertion port and transmitted to the slider, and the second movement of the movable member is performed. And a cam that converts the movement in the direction to a direction in which the shutter closes the insertion opening and transmits the movement to the slider.

According to this configuration, the driving force for the shutter to open and close the insertion opening is generated by converting the movement of the movable member. Therefore, the structure of the shutter driving device including the clamp function can be simplified. Further, since the driving force of the shutter is not generated from the movement of the tray or the like that supports the information recording medium, no load or impact is applied to the information recording medium by opening and closing the shutter.

A clamp for clamping and unclamping the information recording medium; and a clamp for converting the movement of the movable member in the first direction into a driving force for unclamping the information recording medium. And a second cam that converts the movement of the movable member in the second direction into a driving force for clamping the information recording medium and transmits the driving force to the clamping unit. .

According to this configuration, the driving force for clamping and unclamping the information recording medium together with the driving force for opening and closing the insertion opening by the shutter is generated by converting the movement of the movable member. Therefore, the structure of the shutter driving device including the clamp function can be simplified.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a recording / reproducing apparatus according to an embodiment of the present invention;

FIG. 1 shows a configuration of a main part of a shutter driving device of the recording / reproducing apparatus of this embodiment, FIG. 2 is a plan view of the recording / reproducing apparatus of this embodiment, and FIG.
It is arrow sectional drawing in the -3 line. The recording / reproducing apparatus according to this embodiment is a disc player having a function of reading information recorded on an information recording medium such as a compact disc (CD) and a laser disc (LD). As shown in the figure, this disc player comprises an A slider 11 and a B slider.
It comprises a slider 12, a C slider 13, a panel 14, a tray 21, and a mechanical unit 22.

The panel 14 has an insertion port 141 which covers the front surface of the main body of the recording / reproducing apparatus and through which the tray 21 can be taken in and out.

The A-slider 11 is guided by a long groove in the chassis of the mechanical section 22 so as to be movable only in the left-right direction (directions 11a and 11b in FIG. 1), and converts horizontal movement into vertical movement. Cam grooves 111 are formed at two places. Further, a rack 113 is formed on one surface, and a horn-like projection 112 is formed on a lower portion.

Like the A slider 11, the B slider 12 is guided by the chassis of the mechanical section 22 by a long groove so as to be movable only in the left-right direction.
2, and a square hole 122 is formed. For this reason,
The A-slider 11 and the B-slider 12 can move only in the left-right direction in conjunction with each other. Further, as shown in FIG. 1, the B slider 12 is formed with two axial protrusions 121.

The C slider 13 is inserted into the insertion opening 1 of the panel 14.
A shutter 132 for closing the shutter 41 is provided. The shutter 132 is guided by the panel 14 so as to be movable only in the vertical direction, and is urged by a spring in a closing direction (upward). The C slider 13 has two cam grooves 131 which engage with the protrusions 121 of the B slider 12 and convert horizontal movement into vertical movement.

As shown in FIG. 4, when the shutter is closed, the cam groove 131 and the projection 121 are in contact with each other.
Is formed in such a shape and size that the distance between the side wall and the protrusion 121 is about 0.5 mm. The end of the cam groove 131 is formed to extend in the horizontal direction. At the end of the cam groove 131, the protrusion 121 is movable only in the horizontal direction.

The tray 21 is a compact disk (C
D) for mounting an information recording medium such as a laser disk (LD), which is slidably held in the horizontal direction, from the insertion opening 141 of the panel 14 to a position where the information recording medium can be taken in and out. Extruded and retracted from that position. In the center of the tray 21, a groove capable of storing the turntable 25 is formed.

The mechanical section 22 includes a planetary gear train 23, a motor 24 for driving a planetary gear train, a turntable 25,
6, including a mechanism such as a traverse unit (not shown).

The planetary gear train 23 is connected to a motor 24 by a driving belt 29, and is rotated by the rotation of the motor 24. The planetary gear train 23 meshes with the rack 113 of the A slider 11 and transmits the rotational force to the A slider 11 to move the A slider 11 in the horizontal direction. The planetary gear train 23 also engages with a rack formed on the side surface of the tray 21, and changes the gear to change the rotational force of the tray 21.
And pushes or pulls out the tray 21.

The turntable 25 is rotatably supported by a support 26 and is driven to rotate by a motor (not shown). The support portion 26 has a protrusion 26 a engaged with the cam groove 111 of the A slider 11, and moves up or down in accordance with the sliding operation of the A slider 11. The turntable 25 also moves up or down as the support 26 moves up and down. When the turntable 25 rises, the disc 31 is clamped between the turntable 25 and a clamper 28 disposed above the disc 31. When the turntable 25 is lowered, the disk 31 is unclamped. The traverse unit includes an optical pickup, a motor for moving the optical pickup, and the like.

Next, the operation of the shutter driving device of the recording / reproducing apparatus having the above configuration will be described. First, FIG.
(A), the shutter 132 is closed and the tray 2 is closed.
An operation (open operation) from the state where the tray 1 is pulled in until the shutter 132 is opened and the tray 21 is pulled out as shown in FIG. 3B will be described.

For example, a control unit (not shown) drives the motor 24 by pressing the open / close button provided on the panel 14 and selecting the operation of pulling out the tray 21. Motor 2
4 is transmitted to the planetary gear train 23 via the belt 29 to rotate the planetary gear train 23. Planetary gear train 23
Transmits power to the rack 113 of the A slider 11,
The slider 11 is driven in the direction of 11a shown in FIG. A
The protrusion 26a engaging with the cam groove 111 of the slider 11 is
With the horizontal movement of the A slider 11, the cam groove 111
Moves downward corresponding to the shape of. Therefore, the support portion 26 moves downward.

The downward movement of the support portion 26 causes the turntable 25 supported by the support portion 26 to move downward, thereby unclamping the disk 31. As a result, the disc 31 is placed on the tray 21 and can move together with the tray 21.

In conjunction with the movement of the A slider 11, the B slider 12 engaged with the A slider 11 also slides in the direction of 11a. Further, the protrusion 121 of the B slider 12
The slider 13 in which the cam groove 131 is engaged with the
As the slider 12 moves in the 11a direction, the cam groove 13
Slide downward according to the shape of 1.

When the C slider 13 slides downward, the shutter 132 that has blocked the insertion opening 141 of the panel 14 moves downward against the upward urging force. As a result, the insertion opening 141 of the panel 14 is opened, and the tray 21 can enter and exit.

When the A-slider 11 has been slid in the direction 11a, the planetary gear train 23 transmits power to a rack formed on the side surface of the tray 21 and pushes the tray 21 toward the insertion slot. When the tray 21 is pushed out to a position where the disk 31 can be taken in and out, the open operation ends.

By the above operation, the tray 21 is completely pulled out, and the disk 31 as an information recording medium can be mounted on the tray 21 or the disk 31 mounted on the tray 21 can be taken out.

On the other hand, when the tray 21 is accommodated in the player body, the closing operation is started by, for example, pressing an open / close button provided on the panel 14 and selecting the operation of pulling in the tray 21.

First, a control unit (not shown) drives the motor 24 in the reverse direction. The rotational force of the motor 24 is transmitted to the planetary gear train 23 via the belt 29, and rotates the planetary gear train 23. The planetary gear train 23 transmits power to the rack on the side surface of the tray 21 and retreats the tray 21 to a position where the disk 31 can be clamped.

After the pull-in operation of the tray 21 is completed, the planetary gear train 23 transmits power to the rack 113 of the A slider 11. The planetary gear train 23 moves the A slider 11 in the direction of 11b shown in FIG. With the movement of the A slider 11, the B slider 12 coupled to the A slider 11 also
Slide in the 1b direction.

Further, the C slider 13 in which the cam groove 131 is connected to the protrusion 121 of the B slider 12 slides upward according to the shape of the cam groove 131 as the B slider 12 moves in the 11b direction. I do.

When the C slider 13 slides upward, the shutter 132 moves upward and the panel 1
4 is closed. The shutter 132 is the insertion port 14
When the blocker 1 is closed, as shown in FIG.
The second protrusion 121 is located at the end of the cam groove 131 of the C slider 13. Since the protrusion 121 is movable only in the horizontal direction, even if a vertical force is applied to the C slider 13 from the outside, the protrusion 121 of the B slider 12
The lock function is performed by regulating the movement of the third.

As the A-slider 11 moves in the horizontal direction, the support portion 26 moves upward corresponding to the shape of the cam groove 111. When the support 26 moves upward, the turntable 25 supported by the support 26 moves upward, and clamps the disk 31 together with the clamper 28. This completes the closing operation.

The above-described shutter driving device uses the driving force for opening and closing the shutter 132 and the driving force for clamping and unclamping the disk 31 with the A slider 11.
Is generated by converting the horizontal movement of the driving device. The driving device has a simple structure and is easy to assemble.

Further, since the tray 21 is mechanically separated from the opening / closing device of the shutter 132, no load is applied to the tray 21 when the shutter is opened / closed.

When the shutter 132 closes the insertion opening 141, a gap is formed between the edge of the cam groove 131 of the C slider 13 and the projection 121 of the B slider 12, so that an external impact is supported. Transmission to the mechanical section 22 including the section 26 is suppressed.

The protrusion 121 of the B slider 12 and C
Since the end of the cam groove 131 of the slider 13 functions to lock the shutter 132, there is no need to separately attach a lock mechanism.

In the above embodiment, the cam for driving the shutter is formed by engaging the projection 121 formed on the B slider 12 with the cam groove 131 formed on the C slider 13. , A cam for driving the shutter may be formed by forming a cam groove in the B slider 12 and engaging them with each other. Also,
Other configurations of cams may be used.

Similarly, in the above embodiment, a cam for clamping / unclamping is formed by engaging the projection 26a formed on the support portion 26 with the cam groove 111 formed on the A slider 11. However, a cam for clamping / unclamping may be formed by forming a projection on the A slider 11 and forming a cam groove on the support portion 26 and engaging them. Further, a cam having another configuration may be used.

In the above embodiment, the A slider 11 and the B slider
Although the slider 12 and the slider 12 are configured separately, the A slider and the B
The slider may be formed integrally. In the above embodiment, the operation of the shutter 132 is described as a vertical movement. However, by deforming the shape of the cam groove 131 or the guide supporting each slider, the shutter 132 opens and closes in a circular motion or another direction. It is also possible to set as follows.

Further, in this embodiment, the movement of the A slider 11 is converted into the movement of the C slider 13 in the opening and closing direction of the shutter 132 by using a cam having a structure in which the projection 121 is connected to the cam groove 131. It is also possible to convert the movement of the A slider 11 into the movement of the C slider 13 in the opening and closing direction of the shutter 132 by using a cylindrical cam or the like.

Further, the A-slider 11 and the tray 21 are moved in order by switching the planetary gear train 23.
May be driven. For example, when pulling out the tray 21, the first motor is rotated to move the A slider 11, and the support portion 26 is moved downward.
The tray 21 may be moved and pulled out by driving the second motor. When storing the tray 21, the second motor is driven to store the tray 21, and then the first motor is rotated to move the A slider 11 and move the support 26 upward. Let it. The operation timing of each motor can be controlled by the control unit.

Further, in the embodiment, the slide operation of the slider is converted into the movement of the shutter and the turntable. However, any operation other than the slide may be converted into the movement of the shutter and the turntable. For example, the rod may be rotated by the driving unit, and the rotation of the rod may be converted into the vertical movement of the shutter and the mechanical unit using a cam or the like.

In accordance with the movement of the A slider 11,
Although the turntable 25 and the support part 26 were moved up and down,
A protrusion is provided on a chassis or the like of the mechanical unit 22 and is engaged with the cam groove 111 of the A-slider 11.
The whole may be moved up and down.

Further, in this embodiment, an example in which an information recording disk such as an optical disk or a magnetic disk is used as the information recording medium has been described, but a cassette tape or the like may be used as the information recording medium. In this case, a configuration may be adopted in which a tray for mounting a cassette tape corresponding to the tray 21 in the present embodiment is provided, a cassette tape is mounted on this tray, and the tray is loaded at a predetermined position. Also, the tray function can be provided to the cassette tape loading mechanism without providing the tray.

[0055]

According to the present invention described above, it is possible to obtain a shutter driving device which has no load on the tray when the shutter is opened and closed and has a simple structure.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view for explaining a structure of a shutter driving device of a recording / reproducing device according to an embodiment of the present invention.

FIG. 2 is a plan view of a shutter driving device of the recording / reproducing device according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view taken along line 3-3 of the shutter driving device shown in FIG. 2;

FIG. 4 is a view for explaining a relationship between a protrusion of a B slider and a cam groove of a C slider according to the embodiment of the present invention.

FIG. 5 is a perspective view for explaining a structure of a shutter drive device of a conventional recording / reproducing device.

FIG. 6 is a schematic cross-sectional view for explaining the structure and operation of a shutter drive device of a conventional recording / reproducing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 A slider 12 B slider 13 C slider 14 Panel 21 Tray 22 Mechanical part 23 Planetary gear train 24 Motor 25 Turntable 26 Support part 26 a Projection 28 Clamper 29 Belt 31 Disk 51 Tray 52 Shutter 53 Rotation axis 111 Cam groove 112 Square projection 113 Rack 121 Projecting part 122 Square hole 131 Cam groove 132 Shutter 141 Insertion port

Claims (8)

[Claims] 1. A shutter driving device for a recording / reproducing apparatus, which opens and closes an insertion slot by sliding a shutter covering an insertion slot into and from which a tray supporting an information recording medium enters and exits in conjunction with movement of the tray. A first slider slidably held in a predetermined direction that does not hinder the movement of the tray, a second slider slidably held in an opening and closing direction of the shutter and including the shutter, and the first slider A first cam that converts the movement of the shutter into a movement of the shutter to open and close the insertion opening and transmits the movement to the second slider; and moving the first slider in the predetermined direction in accordance with the movement of the tray. A shutter drive device for a recording / reproducing device, comprising: a drive unit that performs a slide drive. 2. A clamp means for clamping and unclamping the information recording medium, and the movement of the first slider is converted into a driving force for clamping and unclamping of the information recording medium, and is converted into a driving force by the clamp means. Second to communicate
The shutter driving device of the recording / reproducing apparatus according to claim 1, further comprising a cam. 3. The second cam is formed on one of the first slider and the clamp means, and the second cam is formed on the other of the first slider and the clamp means. 3. A shutter drive device for a recording / reproducing apparatus according to claim 2, wherein said shutter drive means comprises a cam groove engaged with said portion. 4. The first cam is formed on one of the first slider and the second slider, and is formed on the other of the first and second sliders. The shutter drive device for a recording / reproducing apparatus according to any one of claims 1 to 3, further comprising: a cam groove engaged with the protrusion. 5. The projection of the first cam and the cam groove have a size such that a gap is formed between an inner edge of the cam groove and the projection when the shutter closes the insertion opening. 5. The shutter driving device for a recording / reproducing device according to claim 4, wherein the shutter driving device is formed in the shape of a shutter. 6. The cam groove of the first cam is provided in the second cam.
An end extending in a direction substantially perpendicular to the sliding direction of the slider, wherein the protrusion of the first cam is provided with the end of the cam groove when the shutter closes the insertion opening. The shutter driving device of the recording / reproducing device according to claim 4, wherein the shutter driving device is engaged. 7. A shutter driving device of a recording / reproducing apparatus for opening and closing a shutter for covering an insertion opening through which an information recording medium enters and exits by sliding the shutter in synchronization with the movement of the information recording medium. A drive unit that drives the movable member in a first direction and a second direction that do not hinder the movement of the information recording medium; a slider that includes the shutter; and a slider that moves the movable member in the first direction. The movement is converted to a movement in which the shutter opens the insertion opening and transmitted to the slider, and the movement of the movable member in the second direction is changed to a movement in which the shutter closes the insertion opening. And a cam for converting and transmitting the converted signal to the slider. 8. A clamp means for clamping and unclamping the information recording medium, and converting the movement of the movable member in the first direction into a driving force for unclamping the information recording medium. And a second cam for transmitting to the clamp means, converting the movement of the movable member in the second direction into a driving force for clamping the information recording medium, and transmitting the drive force to the clamp means. 8. A shutter driving device for a recording / reproducing device according to claim 7, wherein: