JPH0330230B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an optical system for recording or reproducing information by condensing a laser as a light source onto a recording track formed on a disk-shaped recording medium (hereinafter referred to as a disk). The present invention relates to a locking device for an optical head transfer table used in a recording/reproducing apparatus.

Conventional configuration and its problems When transporting an optical recording/reproducing device, if the transfer table is not locked, the optical head attached to the transfer table will move through its movable range due to vibrations, etc., and the optical head drive means may become fixed. Conventionally, a locking device for an optical head transfer table has been regarded as important because it can damage the optical system or cause its adjustment to go out of order.

Hereinafter, a conventional locking device for an optical head transfer table will be explained with reference to FIG.

FIGS. 1A and 1B are plan views of a conventional locking device for an optical head transfer table. In FIG. 1, direction A is the radial direction of the disk. Reference numeral 1 denotes an optical head that focuses light onto a disk (not shown) to record or reproduce information. Reference numeral 2 denotes a transfer table, on which the optical head 1 is attached, and is adhesively fixed to a moving coil (not shown) of a linear motor (not shown) that generates thrust in the radial direction A of the disk. 3 is a shaft whose axis is parallel to the radial direction A of the disk. A roller 4 is attached to the transfer table 2, rotates on the shaft 3, and guides the transfer table 2 and thus the optical head 1 in the disk radial direction A. Reference numeral 5 denotes a stopper, at which the optical head 1 abuts against the transfer table 2 at a position beyond the recording/reproducing area of the disk;
It is an elastic thing that regulates its movement. Reference numeral 6 denotes a locking member, which has a hole slightly larger in diameter than the diameter of the shaft 3, is inserted into the shaft 3, and is movable in the disk radial direction A. 7 is a metal part of the lock member 6. Reference numeral 8 denotes a female thread, which is bored in the metal portion 7 of the locking member 6 in order to screw and fix the locking member 6 to the main body of the optical recording/reproducing apparatus (not shown). Reference numeral 9 denotes an elastic portion of the locking member 6, which is adhesively fixed to the metal portion 7 of the locking member 6 and comes into contact with the transfer table 2 when the locking member is locked. Reference numeral 10 denotes a side plate to which the shaft 3 is fixed, a protrusion is provided on the side of the locking member 6, and a stopper 5 is adhesively fixed to the protrusion and a position opposite to the protrusion, and is fixed to the main body of the optical recording/reproducing apparatus.

In the above configuration, FIG. 1A shows the state of the locking device of the optical head transfer table when the optical recording/reproducing device is not being transported, and the locking member 6 is in contact with the side plate 10 when the optical recording/reproducing device is not transported. The optical head 1 is fixed to the main body of the reproducing apparatus by a female screw 8, and is in a state in which the optical head 1 can freely move in the recording/reproducing area of the disk.

On the other hand, FIG.
The transfer table 2 is brought into contact with a stopper 5 fixed to a side plate 10 without a protrusion, and the lock member 6 is fixed to the main body of the optical recording/reproducing apparatus with a female screw 8 at a position where it is brought into contact with the transfer table 2. The optical head 1 is therefore in a locked state.

Incidentally, recently there has been a strong tendency for optical recording and reproducing devices to have a sealed structure to prevent dust. However, with the above configuration, the optical recording/reproducing device is opened before and after transportation, and there is a high risk that dust will enter the inside.

Furthermore, in order to make it ready for transport or use, the optical recording/reproducing device is opened, the screws of the locking member are removed, the locking member or the transfer table is moved to a predetermined position, and the locking member is placed into the optical recording/reproducing device. It was necessary to perform the troublesome operation of screwing the optical recording and reproducing device back into the sealed state by screwing it into the main body of the device.

Purpose of the Invention The present invention has been made in view of the above-mentioned prior art, and is capable of operating an optical recording and reproducing device by locking and unlocking the transfer table in conjunction with the movement of the jacket mounting means. The optical recording/reproducing device has a sealed structure, which prevents dust from entering the inside of the optical recording/reproducing device during transportation, and also eliminates the need to lock and unlock the transfer platform. A locking device for a head transfer table is provided.

Structure of the Invention The locking device for an optical head transfer stand of the present invention includes a transfer stand on which an optical head is disposed, a transfer means for moving the transfer stand in the radial direction of the disk, and a jacket into which a jacket containing the disk is inserted. a jacket attachment means for attaching the jacket to a desired position; and a transfer table connected to the jacket attachment means and interlocked with the jacket attachment means so as to be in a non-latched state with the transfer table when the jacket is attached and to be in a locked state with the transfer table when the jacket is not attached. and locking means. By interlocking the jacket mounting means and the transfer table locking means, the transfer table is locked when the jacket is not attached, and the transfer table is unlocked when the jacket is attached, thereby making the optical recording and reproducing apparatus a sealed structure. This prevents dust from entering the optical recording/playback device during transportation, and also locks the transfer platform during transportation.
The operation to release the lock can be eliminated.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

2 and 3 are perspective views of a locking device for an optical head transfer table according to an embodiment of the present invention, with FIG. 2 showing the locked state and FIG. 3 showing the unlocked state. In FIGS. 2 and 3, the X-axis direction is the disk radial direction. The Z-axis direction is a direction perpendicular to the disk. Therefore, the Y-axis direction is the X-axis,
This is the direction perpendicular to the Z axis. Reference numeral 11 denotes a transfer table, which is provided with an optical head (not shown), is adhesively fixed to a moving coil (not shown) of a linear motor (not shown), and is subjected to force in the X-axis direction by this linear motor. It is guided in the X-axis direction by rollers (not shown) and a shaft (not shown). A lock pin 12 is engaged with a hole provided in the transfer table 11 and fixed by adhesive. Reference numeral 13 denotes a lock lever, which is provided with a plurality of V-shaped grooves that can be engaged with the lock pin 12 continuously in the X-axis direction. 14 is a lock lever guide, which is the main body of the optical recording/reproducing device (not shown).
The portion 14a in the figure is press-fitted into the hole provided in the hole. 15 is a lock lever guide elongated hole, which engages with the part 14 _b in the figure of the lock lever guide 14;
The lock lever 13 is provided so that the lock lever 13 can move in the Y-axis direction. Reference numeral 16 denotes a lever drive pin elongated hole, which is provided in the lock lever 13 with its longitudinal direction being the X-axis direction. Reference numeral 17 denotes a lever drive arm that rotates around the Z-axis using a lever drive shaft 19 (described later) as a fulcrum, and moves the lock lever 13 in the Y-axis direction. Reference numeral 18 denotes a lever drive pin, the part _18a in the figure is engaged and fixed in a hole provided in the lever drive arm 17, and the part _18b in the figure is movably engaged in the lever drive pin elongated hole 16 of the lock lever 13. ing. Reference numeral 19 denotes a lever drive shaft, the part _19a in the figure is rotatably inserted into the main body of the optical recording/reproducing apparatus, and the part _19b in the figure is fixed to a hole provided in the lever drive arm 17.
Reference numeral 20 denotes a driving force transmitting arm, which rotates around the Y-axis about a driving force transmitting shaft 23, which will be described later, as a fulcrum, and rotates the lever drive arm 17 around the Z-axis. Reference numeral 21 denotes a driving force transmitting pin elongated hole, which is provided in the driving force transmitting arm 20 with its longitudinal direction being the Z-axis direction. A driving force transmitting pin 22 is movably inserted into the driving force transmitting pin elongated hole 21 of the driving force transmitting arm 20 and fixed to the lever driving arm 17. Reference numeral 23 denotes a driving force transmission shaft, and a portion 23 _a in the figure is rotatably inserted into the main body of the optical recording/reproducing device, and a portion 23 _b in the figure is fixed to a hole provided in the driving force transmission arm 20 . 24 is a jacket holder, into which a jacket (not shown) containing a disk (not shown) is inserted from the part _24a in the figure;
It guides the jacket in the X-axis direction. 2
5 is a connecting pin, the part 25 _a in the figure is fixed to a hole provided in the jacket holder 24, and the part 25 a in the figure is fixed to the hole provided in the jacket holder 24
The portion _5b is rotatably inserted into a hole provided in the driving force transmission arm 20. 26 is a loading plate, and when the jacket is manually inserted into the jacket holder 24 and further inserted after one end of the jacket hits the part _26a in the figure,
It moves in the + direction of the X-axis. Reference numeral 27 denotes an eject button, which is a button to be pressed when removing the attached jacket. 28 is an eject plate, to which the eject button 27 is integrally attached, and when the eject button 27 is pushed in the + direction of the X axis with the jacket attached,
Move in the + direction of the X-axis and remove the jacket holder 24.
is moved in the + direction of the Z axis, and as a result, the loading plate 26 is moved in one direction of the X axis. 2
A loading guide 9 is used to guide the jacket holder 24, loading plate 26, and eject plate 28, and is fixed to the main body of the optical recording/reproducing apparatus. 30 is a jacket holder guide long hole, and loading guide 2
9 with the longitudinal direction being the Z-axis direction.
A jacket holder guide groove 31 is provided on the loading plate 26 so that the jacket holder 24 can move in the Z-axis direction. 3
1' is the position corresponding to the jacket holder guide groove,
Like the jacket holder guide groove 31, this is the YZ side surface of the loading plate 26 that allows the jacket holder 24 to move in the Z-axis direction. 32
is a jacket holder guide oblique oblong hole, which is provided in the eject plate 28 so that its longitudinal direction is at an angle of 45 degrees with the X axis. A jacket holder guide pin 33 is fixed in a hole provided in the jacket holder 24. Reference numeral 34 denotes a loading plate guide elongated hole, which is provided in the loading plate 26 with its longitudinal direction being the X-axis direction. Reference numeral 35 denotes an eject plate guide elongated hole, which is provided in the eject plate 28 with its longitudinal direction being the X-axis direction. Reference numeral 36 denotes a plate guide pin, which is movably inserted into the loading plate guide long hole 34 of the loading plate 26 and the eject plate guide long hole 35 of the eject plate 28.
It is fixed in the hole provided in the. Reference numeral 37 denotes a plate guide shaft, which is movably inserted into the loading plate guide long hole 34 of the loading plate 26 and the eject plate guide long hole 35 of the eject plate 28, and is fixed to the main body of the optical recording/reproducing apparatus. ing. Reference numeral 38 denotes a loading plate return spring, one end of which is attached to the main body of the optical recording/reproducing apparatus, and the other end of which is attached to the loading plate 26 in a state where it is compressed from its natural length. Reference numeral 39 denotes an eject spring, one end of which is attached to the plate guide shaft 37, and the other end of which is attached to the eject plate 28 when the eject plate 28 is located at the most side of the X axis, that is, when the jacket is attached. It is installed so that it is long. Reference numeral 40 denotes a stopper, which is fixed to the main body of the optical recording/reproducing apparatus and prevents the loading plate 26 from moving more than necessary in one direction of the X-axis.

The operation of the locking device for the optical head transfer table constructed as described above will be explained below.

First, the locked state shown in FIG. 2, that is, the state in which the jacket is not attached, will be explained. The plate guide pin 36 and the plate guide shaft 37 are located on the + side of the X-axis of the loading plate guide long hole 34 of the loading plate 26, and on the + side of the X-axis of the eject plate guide long hole 35 of the eject plate 28. Located on the side. The loading plate return spring 38 is in a compressed state, and its restoring force applies force to the loading plate 26 in one direction of the X-axis. It is stopped with a stopper of 40. The jacket holder guide pin 33 is connected to the loading guide 29.
+ of the Z-axis of the jacket holder guide slot 30
The jacket holder guide oblique slot 32 of the ejection plate 28 is located on the + side of the It is located on one side of the X axis, that is, on the + side of the Z axis. Here, the ejection spring 39 is in tension, and the ejection plate 2
8 is subjected to a force in one direction of the X-axis, but movement in one direction of the X-axis is restricted by the loading plate 26. That is, loading plate 2
6 is located on one side of the X axis, and the eject plate 2
8 is located on the + side of the X axis, and the jacket holder 2
4 is located on the + side of the Z axis. At this time, the driving force transmitting pin elongated hole 22 is located on the + side of the Z axis of the driving force transmitting pin elongated hole 21 of the driving force transmitting arm 20, and the lever driving pin 18 is located on the X side of the lever driving pin elongated hole 16 of the lock lever 13. It is located on the + side of the axis. Furthermore, the lock lever guide 14
It is located on one side of the Y-axis of the lock lever guide elongated hole 15. That is, the lock lever 13 is located on the + side of the Y-axis, the lock pin 12 provided on the transfer table 11 and the V-shaped groove provided on the lock lever 13 are in a locked state, and the transfer table 11 is in a locked state. has been done.

Next, the operation of changing from this locked state to the unlocked state shown in FIG. 3, that is, the state in which the jacket is attached, will be explained. When the jacket is manually inserted into the jacket holder 24 from the section _24a in the figure, one end of the jacket hits the loading plate 26 at the section _26a in the figure. Furthermore, when the jacket is manually pushed, the loading plate 26 is moved in the + direction of the X-axis under the compression and restoring force of the loading plate return spring 38. In addition, jacket holder guide pin 3
Until the position 3 becomes the position of the jacket holder guide groove 31 of the loading plate 26 or the position 31' corresponding to the jacket holder guide groove,
The jacket holder 24 and eject plate 28 are restricted by the loading plate 26 and do not move. When the position of the jacket holder guide pin 33 reaches the position of the jacket holder guide groove 31 of the loading plate 26 or the position 31' corresponding to the jacket holder guide groove,
The jacket holder 24 and eject plate 28 are no longer restricted by the loading plate 26. Therefore, the eject plate 28 moves in one direction of the X-axis and the jacket holder 24 moves in one direction of the Z-axis due to the tensile restoring force of the eject spring 39. Here, the eject plate 28 and the jacket holder 24 move until the eject spring 39 reaches its natural length. The plate guide pin 36 and the plate guide shaft 37 are on one side of the X-axis of the loading plate guide long hole 34 of the loading plate 26, and on one side of the X-axis of the eject plate guide long hole 35 of the eject plate 28. Be on the + side. Further, the jacket holder guide pin 33 is connected to the jacket holder guide elongated hole 3 of the loading guide 29.
0 to one side of the Z-axis and move to the position of the jacket holder guide groove 31 of the loading plate 26 or the position 3 corresponding to the jacket holder guide groove.
1' and moves to the + side of the X axis of the elongated jacket holder guide hole 32 of the eject plate 28, that is, to one side of the Z axis. When the jacket holder 24 moves to one side of the Z-axis in this way, the driving force transmitting arm 20 moves the driving force transmitting shaft 23 because it is rotatably connected to the jacket holder 24 by the connecting pin 25. Rotates counterclockwise around the Y axis as a fulcrum. The driving force transmitting pin 22 is located on one side of the Z-axis of the driving force transmitting pin elongated hole 21 of the driving force transmitting arm 20. At the same time, the lever drive arm 17 rotates counterclockwise around the Z-axis using the lever drive shaft 19 as a fulcrum. Therefore, the lever drive pin 18 moves to one side of the X-axis of the lever drive pin elongated hole 16 of the lock lever 13. At the same time, the lock lever guide 14 is on the + side of the Y-axis of the lock lever guide elongated hole 15 of the lock lever 13.

That is, the lock lever 13 moves to one side of the Y-axis, and the lock pin 12 provided on the transfer table 11 and the V-shaped groove provided on the lock lever 13 become unlocked, and the transfer table 11 is unlocked. be done.

Furthermore, the operation of changing from this unlocked state to the locked state shown in FIG. 2, that is, the state in which the jacket is removed, will be explained. First, when the eject button 27 is manually pushed in the + direction of the X-axis with the jacket attached (Fig. 3), the eject plate 28 is moved to the + side of the X-axis under the tensile restoring force of the eject spring 39. Move to.
At the same time, the jacket holder 24 moves to the + side of the Z axis. At this time, the loading plate 26 is restricted by the jacket holder guide pin 33 and does not move until the jacket holder guide pin 33 comes to the most positive side of the Z axis of the jacket holder guide slot 30 of the loading guide 29. . And the jacket holder guide pin 33
When it comes to the most positive side of the Z axis of the jacket holder guide elongated hole 30 of the loading guide 29, the restriction by the jacket holder guide pin 33 of the loading plate 26 is removed. Therefore, the loading plate 26 is moved in one direction of the X axis by the compressive restoring force of the loading plate return spring 38 to a position where one end hits the gas stopper 40 . The jacket is therefore ready to be taken out. Note that the plate guide pin 36 and the plate guide shaft 37 are connected to the +
This is one side of the eject plate guide elongated hole 35 of the eject plate 28 along the X axis. The position of the jacket holder guide pin 33 is moved to the + side of the Z-axis of the jacket holder guide slot 30 of the loading guide 29, and is placed in the jacket holder guide groove 31 of the loading plate 26 or equivalent to the jacket holder guide groove. position 3
1' on the + side of the X-axis, and moves to one side of the X-axis of the jacket holder guide oblique elongated hole 32 of the eject plate 28, that is, to the + side of the Z-axis. In this way, when the jacket holder 24 moves to the + side of the Z-axis, the driving force transmission arm 20
is connected to the jacket holder 24 by the connecting pin 25.
Since it is rotatably connected to the drive force transmitting shaft 23, it rotates clockwise around the Y-axis using the driving force transmission shaft 23 as a fulcrum. The driving force transmitting pin 22 is connected to the + of the Z axis of the driving force transmitting pin long hole 21 of the driving force transmitting arm 20.
Be on the side. At the same time, the lever drive arm 17 rotates clockwise around the Z-axis using the lever drive shaft 19 as a fulcrum. For this reason, the lever drive pin 18
is the lever drive pin elongated hole 16 of the lock lever 13.
Move to the + side of the X axis. At the same time, the lock lever guide 14 becomes one side of the Y-axis of the lock lever guide elongated hole 15 of the lock lever 13. That is,
The lock lever 13 moves to the + side of the Y-axis, the lock pin 12 provided on the transfer table 11 and the V-shaped groove provided on the lock lever 13 become locked, and the transfer table 11 returns to the locked state.

Furthermore, since the V-shaped groove provided in the lock lever 13 is provided over the entire movable range of the optical head (transfer stage 11), it is possible to lock the optical head at any position.

As described above, according to this embodiment, in conjunction with the axial movement of the disk of the jacket holder,
By locking and unlocking the transfer table at any position, the optical recording/playback device can be made into a sealed structure, which prevents dust from entering the optical recording/playback device during transportation. death,
Furthermore, the operation of locking and unlocking the transfer table at that time can be eliminated.

In this embodiment, the lock pin is provided on the transfer table and the recess (V-shaped groove) is provided on the lock lever, but the same effect can be obtained by providing the lock pin on the lock lever and the recess on the transfer table. .

In addition, in this embodiment, a lock pin is provided on the transfer table and a recess (V-shaped groove) is provided on the lock lever, but the lock pin is connected to one or a plurality of first recesses continuous in the radial direction of the disk or to the first recess. A similar effect can be obtained by providing one of the plurality of second recesses continuous in the radial direction of the lockable disk on the transfer table and the other on the lock lever.

Further, in this embodiment, the recessed portion that can be engaged with the lock pin is formed into a V-shaped groove, but the same effect can be obtained by using a U-shaped groove, for example.

Further, in this embodiment, the jacket holder of the jacket mounting means and the lock lever are connected, but the same effect can be obtained by using a loading plate or an eject plate.

Effects of the Invention As described above, the optical head transfer stand locking device according to the present invention interlocks the jacket mounting means and the transfer stand locking means, locks the transfer stand when the jacket is not attached, and locks the transfer stand when the jacket is attached. Sometimes, by releasing the lock, the optical recording and reproducing device can be made into a sealed structure, which prevents dust from entering the optical recording and reproducing device during transportation, and also locks the transfer platform during transportation. , the operation to release the lock can be eliminated.

[Brief explanation of drawings]

1A and 1B are plan views of the locking device of the conventional optical head transfer table in the unlocked state and the locked state, respectively, and FIG. 2 is a plan view of the locking device of the optical head transfer table in one embodiment of the present invention in the locked state. FIG. 3 is a perspective view of the lock in the unlocked state. 11...transfer table, 12...lock pin, 13...
...Lock lever, 24...Jacket holder.

Claims (1)

[Scope of Claims] 1. A transfer table provided with an optical head for recording or reproducing information signals on a disk-shaped recording medium, a transfer means for transferring the transfer table in the radial direction of the disk-shaped recording medium, and a jacket mounting means into which a jacket containing a disc-shaped recording medium is inserted and for mounting the jacket at a desired position; and a jacket mounting means that is connected to the jacket mounting means and operates in conjunction with the jacket mounting means so as to be disengaged from the transfer table when the jacket is mounted. 1. A locking device for an optical head transfer stand, comprising a transfer stand locking means that is in a stopped state and locked with the transfer stand when the jacket is not attached. 2. The transfer table locking means is provided with either a lock pin or a plurality of recesses continuous in the radial direction of the disc-shaped recording medium that can be locked with the lock pin, and the other is connected to the jacket mounting means and is connected to the transfer table. 2. A locking device for an optical head transfer stand according to claim 1, wherein the transfer stand locking means is provided on a lock lever that moves between a locked state and an unlatched state. 3. The transfer table locking means includes one or a plurality of radially continuous first recesses of the disc-shaped recording medium, or a plurality of radially continuous recesses of the disc-shaped recording medium that can be locked with the first recesses. A transfer table lock having one of the second recesses provided on the transfer table and the other provided on a lock lever that is connected to the jacket mounting means and moves between a locking state and a non-locking state with the transfer table. A locking device for an optical head transfer stand according to claim 1, characterized in that the locking device is a means for locking an optical head transfer table.