JPH0679435B2 - Information recording / reproducing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus using an information recording medium such as a disc such as an optical data file apparatus, and particularly to a vibration control means for reducing vibration from the outside of the apparatus. The present invention relates to a device having the same.

2. Description of the Related Art In recent years, an optical data file device using laser light has been developed as a computer external memory device. In the optical data file device, for example, 1 μ by an optical head
A laser beam focused to a minute spot of about m
Information tracks of a disc formed with a track pitch of about a certain degree are irradiated with known focus and tracking means to record or reproduce signals. Further, the optical head is configured to be movable in the track direction of the disk for performing track search, and is moved by a transfer means such as a linear motor. Therefore, when vibration force is applied to the device during recording or reproduction, the device itself is required to have high vibration resistance in order to apply the light beam to the correct position. Further, with the miniaturization of the device, there is an increasing demand for use in both horizontal and vertical directions as a condition for installing the device. Conventionally, this type of information recording / reproducing apparatus has a structure as shown in FIG. 9 shown in Japanese Utility Model Laid-Open No. 62-117790. A connecting member 102 having a damper 103 incorporated therein is fixed to the chassis 101.
A damper 104 receiving member and a stop plate 105 are provided at both ends of the damper 103, and the damper 103 includes the first coil 106 and the second coil 106.
The coil 107 is elastically held on the frame 109 by the axial screw 108. Incidentally, 110 is a receiving ring for receiving the second coil 107.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The chassis 101 has its own weight corrected by the spring force of the first coil 106 and the second coil 107, and is held at a predetermined height, and is also damped by the damper 103. Vibration from the outside is blocked. However, when this device is tilted 90 degrees and used in the vertical direction, the direction of the self-weight of the chassis 101 is different from the spring force direction of the first coil 106 and the second coil 107, and the chassis 101 is more than the predetermined height. If it is displaced, the necessary vibration space cannot be maintained, and for example, the chassis 101 comes into contact with the frame 109, and the vibration damping effect of the damper 103 cannot be obtained. The present invention has been made to solve the above problems, and an object of the present invention is to provide an information recording / reproducing apparatus capable of obtaining a reliable anti-vibration effect even when the apparatus is used in both horizontal and vertical directions. To do.

Means for Solving the Problems The technical means of the present invention for solving the above problems include a chassis having information recording / reproducing means, a vibration isolating means for isolating the chassis from external vibration, and holding the chassis in place. Elastic holding means, position detecting means for detecting the installation direction of the chassis, and variable means for changing the elastic force of the elastic holding means based on the signal from the position detecting means.

With the above configuration, the present invention detects the installation direction of the chassis by the position detection means, operates the variable means based on the signal of the position detection means, and changes the elastic force of the elastic holding means to the installation direction of each chassis ( It is possible to provide an information recording / reproducing apparatus having a vibration-proof effect in both the horizontal and vertical directions by varying the chassis so as to hold the chassis in a predetermined position in which the vibration-proofing means has a small deflection and the vibration space can be taken. it can.

Embodiment One embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an exploded perspective view showing an embodiment in which the present invention is applied to an apparatus using a cartridge such as an optical disk. In FIG. 1, a cartridge 1 containing a disc 1b is inserted into the apparatus while rotating a rotary lid 4 which covers an opening 3a of a front panel 3 provided on the front surface of an exterior frame 2. The front panel 3 is provided with an eject button 3b for operating the loading motor 42 in order to eject the inserted cartridge 1 out of the apparatus. A cartridge holder 12 for receiving the inserted cartridge 1 is provided in the exterior frame 2, and the cartridge holder 12 has a groove portion 14a in which pins 13 set up on the cartridge holder 12 are provided at both ends of a slide cam 14.
Through, and engages with the L-shaped groove portions 16a of the guide frames 16 provided on both sides of the chassis 5, and is guided so as to be movable along the shape of the groove portions 16a. And slide cam
Pins 15 set up at both ends of the pin 14 are movably guided by engaging with the long holes 16b of the guide frame 16, and the movement of the slide cam 14 causes the cartridge holder 12 to move in the L-shape. give. The chassis 5 is capable of moving within a predetermined range according to vibration applied from the outside of the apparatus via a vibration damping damper 9 which is a vibration damping means, a spring force adjusting pin 11, and a coil spring 10 which is an elastic holding means for holding the chassis 5. It is elastically supported by. The vibration damper 9 has a characteristic that it is soft in the X and Y directions and hard in the Z direction shown in FIG. In the configuration of the present invention, X
Since the direction coincides with the tracking control direction and the Y direction coincides with the focus control direction, it is generally important to prevent external vibrations in the focusing and tracking directions. As shown in FIG. 2, the spring force adjusting pin 11 has a hole 5a in the chassis 5.
Is slidably guided to the bottom of the slide cam 14, and as the slide cam 14 moves, a hole
It is set to be insertable in 14d and can be moved to the position shown in FIG. 2 (b). In this way, the spring force of the coil spring 10 can be varied by moving the spring force adjusting pin 11. For example, when the apparatus shown in FIG. 8A is used in a horizontal installation, the tip of the spring force adjusting pin 11 is in contact with the bottom of the slide cam 14, and the weight of the chassis 5 is equal to the coil spring 10.
Offset by the spring pressure of the chassis 5
Is held at a predetermined position with less distortion. When the apparatus shown in FIG. 8B is used in a vertical installation, the tip of the spring force adjusting pin 11 is in contact with the hole 14d of the slide cam 14, and the spring pressure of the coil spring 10 is shown in FIG. It is weakened compared to a), the amount of movement in the Y direction due to the spring pressure of the coil spring 10 of the chassis 5 is reduced, and the chassis 5 has a vibration damping damper 9
Is held at a predetermined position with less distortion. And chassis 5
On the front side of the cartridge 1, the disk motor table 7, the optical head portion 8 which is a recording / reproducing means configured to be movable at a high speed within a predetermined range, and the positioning hole 1c provided at the bottom portion of the cartridge 1 are engaged to engage the cartridge 1 There is provided a pair of cartridge positioning pins 6a and a pair of cartridge height determining pins 6b for performing the positioning. On the other hand, on the back side of the chassis 5, a motor base 40 having a gear group 41 and a loading motor 42 for engaging the rack 14b of the slide cam 14 to move the slide cam 14 and the chassis 5 are mounted on the exterior frame 2.
A chassis lock plate 47 pivotally supported by a pin 48 for locking to is provided. The chassis lock plate 47 has a guide groove 47a that engages with the pin 43 fixed to the slide cam 14, a V-shaped portion of the chassis lock pin 49 having a V-shaped groove fixed to the exterior frame 2, and the chassis. A groove portion 47b that can be brought into and out of contact with the rotation of the lock plate 47 is provided. When the cartridge 1 is inserted into the apparatus as shown in FIG. 3, the pin 43 of the slide cam 14 is at the position shown by the solid line in the figure, and the groove portion 47b of the chassis lock plate 47 is the V-shape of the chassis lock pin 49. The chassis 5 is engaged with the shape part.
Is fixed to the exterior frame 2. When the cartridge 1 is completely attached to the apparatus, the pin 43 of the slide cam 14 moves to the position shown by the broken line in FIG. 3, and the chassis lock plate 47 is rotated to the position shown by the one-dot chain line in FIG. 47
The groove portion 47b of the chassis lock pin 49 is disengaged from the V-shaped portion, and as a result, the chassis 5 is unfixed from the exterior frame 2, and as described above, the vibration damper 9, the coil spring 10, and the spring force. The adjustment pin 11 elastically supports the exterior frame 2. At the center of the cartridge holder 12, a clamp arm 34 is rotatably supported by a clamp shaft 36, and a torsion coil spring 37 urges a flange 34b of the clamp arm 34 to contact the cartridge holder 12. Then, when the cartridge 1 is mounted in the hole 34a of the clamp arm 34, a lower part having a built-in magnet 39 for fixing the disk 1b contained in the cartridge 1 onto the disk motor table 7 provided in the chassis 5 Clamp holder 38a and upper clamp holder 38b
The clamp 38 consisting of is held so as to be movable only within a predetermined range. A boss 35 is provided at the end of the clamp arm 34, and is supported so as to be able to contact the flange portion 14c of the slide cam 14. When the cartridge 1 is inserted into the cartridge holder 12 as shown in FIG. 4 (a), the clamp arm 34 rotates by contacting the boss 35 and contacts the bottom surface of the upper clamp holder 38b by the clamp 38. Then, the upper surface of the lower clamp holder 38a abuts the flange 12a of the cartridge holder 12, and
The clamp 38 is held substantially parallel to the inserted cartridge 1 at a position where it does not abut. Cartridge holder 12
When the slide cam 14 moves in the direction of the disk motor table 7 (the direction of the arrow Y) due to the movement of the slide cam 14, the boss 35 separates from the flange portion 14c of the slide cam 14, and the torsion coil spring 37 causes the flange 34b of the clamp arm 34 to move the flange 34b. The clamp 38 is rotated to the position shown by the broken line in the drawing, which is in contact with the holder 12, and the clamp 38 is moved to the vicinity of the disc motor table 7. The clamp 38 is thereby magnet 39
The disc 1b is fixed on the disc motor table 7 by the suction force of a suction plate (not shown) provided on the disc motor table 7. Here, the clamp 38 is moved by being amplified more than the downward movement amount of the cartridge holder 12, prevents the contact between the cartridge 1 and the clamp 38 when the cartridge 1 is inserted, and moves the clamp 38 by a slight movement of the cartridge holder 12. The disk motor table 7 is brought close to the disk motor table 7.

Next, a means for mounting or dismounting the cartridge 1 on the cartridge holder 12 will be described. The slide lever 17 on which the cartridge release pin 18, the lock arm pin 21, and the joint pin 20 are erected engages with the long holes 17a and 17b of the slide lever 17 to the pins 22 and 23 fixed to the cartridge holder 12 to insert the cartridge 1. It is fixed to the cartridge holder 12 so as to be slidable in the direction, and is further urged in the ejection direction of the cartridge 1 by a spring 19. The cartridge lock lever 25, to which the cartridge lock pin 26 for locking the cartridge 1 by engaging with the recess 1a of the cartridge 1 and the joint pin 27 are fixed, has the elongated hole portion 25a engaged with the pin 28 fixed to the cartridge holder 12. The cartridge lock pin 26 is slidably fixed to the cartridge holder 12 and is biased in the direction opposite to the arrow A by the spring 25b, and the cartridge lock pin 26 is held at a position where it does not contact the cartridge 1 when the cartridge 1 is inserted. . The joint lever 24 has a hole 24b for engaging the joint pin 27 and the joint pin 20.
And a hole 24a wider than the pin diameter of the joint pin 20 in the X direction is provided, and the pin 22 is rotatably supported on the slide lever 17 and the cartridge lock lever 25. Then, as shown in FIGS. 5A and 5B, when the cartridge 1 is inserted into the cartridge holder 12 and comes into contact with the cartridge release pin 18, and the slide lever 17 moves, the cartridge lock lever 25 moves through the joint lever 24. Moves in the A direction, but the distance between the pin 22 and the joint pin 20 is set so that the moving speed of the cartridge lock pin 26 in the insertion direction of the cartridge 1 (X direction in the drawing) becomes faster than the moving speed of the cartridge release pin 18. The distance between the pin 22 and the joint pin 27 is set. The lock arm 29 is rotatably supported on the slide lever 17 by a pin 23, and is urged by a spring 32 so that the arm portion 29a comes into contact with the lock arm pin 21. Further, when the cartridge 1 is inserted into the lock arm 29 as shown in FIG. 5 (b) and abuts the cartridge release pin 18, the slide lever 17 moves to the position shown in the figure, and engages with the lock arm pin 21. A key portion 29b for locking the slide lever 17 is provided. Release lever with release pin 31 fixed on the lock arm 29
30 is rotatably supported by the pin 23, and the lock arm 29
A spring 33 hung between the lock arm 29 and the lock arm 29 urges the lock arm 29 to abut the flange 29c. And the fifth
As shown in FIG. 3C, when the cartridge holder 12 in which the cartridge 1 is mounted moves in the X direction (mounting direction) along the L-shaped groove 16a of the guide frame 16, the release pin 31 moves along with the movement. Guide frame 16 flange end
16c, the release lever 30 is rotated, and further, as the cartridge holder 12 moves in the Y direction, it is separated from the flange end 16c of the guide frame 16 and then rotated by the biasing force of the spring 33 to rotate the flange of the lock arm 29. It is held at the position indicated by the alternate long and short dash line in the figure that abuts 29c. On the contrary, as shown in FIG. 5 (d), when the cartridge holder 12 in which the cartridge 1 is mounted moves in the discharging direction along the L-shaped groove 16a of the guide frame 16, The release pin 31 slides in contact with the flange end 16d of the guide frame 16 to rotate the release lever 30 and the lock arm 29, and further the flange end 16e.
When the movement of the cartridge holder 12 is completed, the cartridge holder 12 is separated from the flange end 16e and is set at the position shown in FIG. 5 (a). In this way, the release lever 30 rotates the lock arm 29 only when the cartridge holder 12 moves in the ejection direction, and the lock arm pin 21 and the lock arm 29 are rotated.
The engagement with the key portion 29b is released.

The optical head lock arm 44 is rotatably supported by a pin 45 fixed to the slide cam 14, and is biased by a spring 46 so as to come into contact with the edge portion 14e of the slide cam 14, and is provided on the optical head portion 8. It is at a position where it can come into contact with the raised portion 8a. The movement of the slide cam 14 causes the optical head lock arm 44 to come into contact with the side surface of the cartridge height determining pin 6b fixed to the chassis 5, but as shown in FIG. When not mounted, the cartridge height determining pin 6b rotates by contacting the side surface of the cartridge height determining pin 6b, and the convex portion provided on the optical head unit 8 is rotated.
The optical head part 8 is locked to the chassis 5 by abutting on it. When the mounting of the cartridge 1 is completed, the optical head lock arm 44 is separated from the cartridge height determining pin 6b by the movement of the slide cam 14 and contacts the edge portion 14e of the slide cam 14 by the spring 46, as shown in FIG. 6 (b). Thus, it is set outside the moving range of the optical head unit 8.

Next, the rotational force transmission means and the rotation lid transmission means for rotating the rotation lid 4 that covers the opening 3a of the front panel 3 will be described. As shown in FIG. 7, the pair of rotary lids 4 are rotatably supported by the side wall surfaces of the exterior frame 2 and have a gear portion 55 at one end. Gear part 55 is pin 54
It meshes with a pinion 53 that is pivotally supported by. Each pinion 53 has a flange 50a that engages with a pin 51 fixed to the side wall surface of the exterior frame 2 and is movably held in the thickness direction of the cartridge 1 and that can come into contact with the upper surface of the cartridge 1. It meshes with the rack 50b of the shutter drive 50. The shutter driver 50 uses the spring 52 to
Normally, the rotating lid 4 is biased in a direction to cover the opening 3a.

The chassis 5 is provided with a direction detector 56, and the direction detector 56
Is composed of, for example, a mercury switch, and is set to be ON when the device is horizontal and OFF when the device is vertical. Further, the chassis 5 is provided with position detection switches 57a and 57b for detecting the moving position of the slide cam 14, the position detection switch 57a can be operated when the direction detector 56 is ON, and the position detection switch 57a can be operated when the direction detector 56 is OFF. The circuit configuration is such that the detection switch 57b can be operated. The position detection switches 57a and 57b are, for example, the edge portion 14f of the slide cam 14.
Is turned on when is on the position detection switch, and the rotation operation of the loading motor 42 is stopped. Then, as shown in FIG. 2A, the position detection switch 57a is turned on at a position where the tip portion 11a of the spring force adjusting pin 11 comes into contact with the bottom surface of the slide cam 14, so that the position detection switch 57a is turned on.
b is arranged so that it is turned on at a position where the tip 11a of the spring force adjusting pin 11 engages with the hole 14d of the slide cam 14. When the edge portion 14e of the slide cam 14 moves between the position detection switches 57a and 57b, the cartridge holder 12
The guide groove 14a of the slide cam 14 is formed so that a part of the guide groove 14a is parallel to the moving direction of the slide cam 14, that is, the X direction so as not to move.

The operation of the configuration of the above one embodiment will be described. First, the case where the apparatus is installed horizontally as shown in FIG. 8 (a) will be described. At this time, the direction detector 56 is turned on and the position detection switch 57a becomes operable.
7b becomes inoperable. The cartridge 1 containing the disk 1b is inserted into the apparatus while rotating the rotary lid 4 that covers the opening 3a of the front panel 3 provided on the front surface of the exterior frame 2, but is interlocked with the rotation of the rotary lid 4. Then, since the shutter driver 50 moves up, the flange 50a of the shutter driver 50 moves to the upper surface side of the cartridge 1 as shown in FIG. 7 (b) and does not hinder the insertion operation of the cartridge 1. At that time, the slide cam 14 is in a position close to the front panel 3, and the chassis 5 is engaged with the chassis lock pin 49 provided on the exterior frame 2 via the chassis lock plate 47 as shown by the solid line in FIG. Cartridge holder fixed to the frame 2 and installed on the chassis 5
12 is held at a position where the cartridge 1 inserted through the opening 3a of the front panel 3 can be easily inserted into the cartridge insertion opening of the cartridge holder 12. Then, when the cartridge 1 is further inserted, the tip of the cartridge 1 contacts the cartridge release pin 18 while being housed in the cartridge holder 12 and overcomes the pressing force of the coil spring 19 to move the slide lever 17 to the fourth position.
Move in the direction of arrow X in the figure. With the movement of the slide lever 17, the joint pin 20 eventually comes into contact with the end of the hole 24a of the joint lever 24. Therefore, the joint lever 24 connected to the joint pin 20 of the slide lever 17 is a pin.
As a result, the cartridge lock lever 25, which is connected with the joint lever 24 and the joint pin 27, moves in the direction of arrow A, and the cartridge lock pin 26 fixed to the joint lever 24 moves the cartridge lock pin 26.
It is inserted into the concave portion 1a. The lock arm pin 21 fixed to the slide lever 17 moves in the direction of arrow X while contacting the arm portion 29a of the lock arm 29 in conjunction with such an operation, but the lock arm pin 21 causes the key portion of the lock arm 29 to move. When it reaches 29b, the lock arm 29 is rotated by the turning force of the spring 32, and the lock arm pin 21 engages with the key portion 29b of the lock arm 29. As a result, the slide lever 17 which is normally moved in the ejection direction of the cartridge 1 by the coil spring 19 is regulated by the lock arm 29, and the cartridge 1 is placed at a predetermined position of the cartridge holder 12 as shown in FIG. And held by the cartridge lock pin 26. When the detection switch (not shown) detects that the cartridge 1 is held at the predetermined position of the cartridge holder 12, the loading motor 42 rotates and the gear group 41 decelerates the slide cam at a predetermined speed.
Move 14 in the X direction. Then, when the edge portion 14e of the slide cam 14 comes over the position detection switch 57a, the rotation operation of the loading motor 42 stops and the movement of the slide cam 14 is completed. The movement of the slide cam 14 moves the cartridge holder 12 along the L-shaped groove portion 16a of the guide frame 16, so that the cartridge holder 12 is initially moved to the X position.
The cartridge 1 moves in the direction, and is loaded into the apparatus through the opening 3a of the front panel 3. Next, the cartridge holder 12 moves in the Y direction, and the cartridge 1 becomes the cartridge 1.
The positioning hole 1c is engaged with the cartridge positioning pin 6a on the chassis 5, and the disc 1b is fixed at a predetermined position where the disc motor table 7 can be mounted. During this operation, the release lever 30 rotates due to the contact between the release pin 31 fixed to it and the flange end 16c of the guide frame 16, but since it rotates in a direction that does not give a rotation operation to the lock arm 29, The lock arm pin 21 remains engaged with the key portion 29b of the lock arm 29. On the other hand, as shown in FIG. 4 (a), the cartridge 1
The clamp 38, which is held substantially parallel to the clamp holder 34, is held by the torsion coil spring 37 along with the movement of the cartridge holder 12 in the Y direction.
Since it rotates to the position shown in FIG.
It moves to the vicinity of the disk motor table 7. Then, the clamp 38 is attracted to the disc motor table 7 by the attraction force between the magnet 39 and the attraction plate of the disc motor table 7, the disc 1b is fixed on the disc motor table 7, and the loading of the cartridge 1 is completed. When the cartridge holder 12 is moved in the Y direction, the flange 50a of the shutter driver 50, which is in contact with the upper surface of the cartridge 1, is also moved in the Y direction by the spring 52, so that the rotary lid 4 rotates and the front panel 3 of the front panel 3 rotates. Opening 3a
To block dust from the outside of the device. The cartridge holder 12 is a cartridge positioning pin of the chassis 5.
When the cartridge 1 is engaged with the cartridge 6a and is held at the predetermined position, the cartridge 1 is at the position shown by the broken line in FIG. 7 (a), and the flange 50a of the shutter driver 50 is released from the contact with the cartridge 1. As a result, even if vibration is applied from the outside and the chassis 5 is vibrated, the rotation lid 4 does not rotate. on the other hand,
The movement of the slide cam 14 releases the engagement between the chassis lock plate 47 provided on the chassis 5 and the chassis lock pin 49 of the exterior frame 2 as shown by the solid line in FIG. Is in contact with the bottom of the slide cam 14, and the spring pressure of the coil spring 10 causes the chassis 5 to move.
The chassis 5 is elastically held at a predetermined position where the vibration damper 9 has a small amount of distortion, because the chassis 5 cancels out its own weight.
Further, as the slide cam 14 moves, the contact of the optical head lock arm 44 with the convex portion 8a of the optical head portion 8 is released, and the optical head lock arm 44 is moved as shown in FIG. 6 (b).
As shown in FIG. 5, the optical head unit 8 can be moved by retracting it outside the moving range of the optical head unit 8. After the above loading operation is completed, the disk motor table 7 rotates and the optical head unit 8 writes information to the disk 1b or reads information from the disk 1b. However, the anti-vibration damper 9 prevents vibration shock from the outside. Since the chassis 5 is anti-vibration, good recording / playback is guaranteed.

Next, the case where the cartridge 1 is discharged from the apparatus will be described. When the eject button 3b of the front panel 3 is pressed, the loading motor 42 rotates in the direction opposite to that at the time of loading, and the slide cam 14 moves in the direction opposite to the X direction.
As a result, the operation is the reverse of the loading operation, and when the cartridge holder 12 moves in the direction opposite to Y, the cartridge 1
Contacts the flange 50a of the shutter driver 50 and rotates the rotary lid 4 covering the opening 3a of the front panel 3 to allow the cartridge 1 to be ejected to the outside of the apparatus. And the release pin 31 of the release lever 30 is the cartridge holder.
When 12 moves in the direction opposite to X, it comes into contact with the flange end 16d of the guide frame 16 and gives the release lever 30 rotation in the C direction. Therefore release lever 30 and flange
The lock arm 29 in contact with 29a also rotates in the C direction,
The engagement between the lock arm pin 21 and the key portion 29b of the lock arm 29 is released. At that time, the slide lever 17 moves in the ejection direction of the cartridge 1 (the direction opposite to X) by the urging force of the spring 19, but the cartridge lock engaged with the concave portion 1a of the cartridge 1 connected to it through the joint lever 24. Since the lever 25 also moves in the direction opposite to A and the moving speed of the cartridge lock pin 26 holding the cartridge 1 in the X direction is faster than the moving speed of the cartridge release pin 18, the cartridge 1 moves the cartridge release pin of the slide lever 17. It is ejected from the cartridge holder 12 without being restricted by the cartridge lock pin 26 while being pressed by the pin 18. Joint lever
After the rotation of 24 is stopped, the slide lever 17 can be further moved to a position where the joint pin 20 comes into contact with the other end of the hole 24a of the joint lever 24, so that the cartridge 1 is opened by the cartridge release pin 18 in the front panel 3. It is discharged from the unit 3a to the outside of the device. This cartridge 1
The chassis lock plate 47 is rotated by the pin 43 of the slide cam 14 and is engaged with the chassis lock pin 49 of the exterior frame 2 before the cartridge is ejected from the cartridge holder 12, so that the chassis 5 is fixed to the exterior frame 2 and the cartridge holder.
Since the cartridge 1 is held at a position where the cartridge 1 can be discharged to the outside of the apparatus through the opening 3a of the front panel 3, the cartridge 1 discharged from the cartridge holder 12 is discharged to the outside of the apparatus without difficulty. Further, the slide cam 14 is loaded with a loading motor 42 by a detection switch (not shown).
The release pin 31 of the release lever 30 is moved to the position shown in FIG.
Abutting against the flange end 16d of the
When the cartridge holder 12 comes into contact with 6e and is separated from the flange end 16e when the movement of the cartridge holder 12 is completed, the release lever 30 and the lock arm 29 are rotated by the urging force of the spring 32, and the lock arm is rotated.
The arm portion 29a of 29 is rotated to a position where it comes into contact with the lock arm pin 21. The operation described above completes the unloading of the cartridge 1. The operation of releasing the clamp of the disk is the reverse of the operation at the time of loading, and the description thereof will be omitted.

Next, a case where the apparatus is installed vertically as shown in FIG. 8 (b) will be described. When the chassis 5 is vertically installed and the loading is completed by the same operation as the horizontal installation described above, the own weight of the chassis 5 acts in the Z direction, and only the spring pressure of the coil spring 10 is applied in the Y direction. Since the characteristics of the vibration damper 9 are soft in the XY directions and hard in the Z direction, the amount of deformation of the vibration damper 9 in the Z direction is relatively small, and there is no problem, but the amount of deformation in the Y direction is large, and the chassis 5 or The mounted parts may come into contact with the exterior frame 2 due to external vibration, or the vibration damper 9
Since the deformation amount is large, a predetermined damper characteristic cannot be obtained, and good recording and reproduction cannot be performed against external vibration. The operation for avoiding the above-mentioned inconvenience will be described below. To avoid duplication, the description of the same operation as the above horizontal installation is omitted. Direction detector 56 for vertical installation
Turns off and the position detection switch 57b is set to be operable, and the position detection switch 57a is set to be inoperable. As a result, when loading, the slide cam 14
The edge part 14f of 14 moves to the position detection switch 57b until it stops, but at this time, the tip of the spring force adjusting pin 11 engages with the hole 14d of the slide cam 14 as shown in FIG. 2 (b). The spring force adjusting pin 11 from the position shown in FIG.
Since the coil spring 10 moves to the position shown in FIG. 7B, the spring pressure of the coil spring 10 becomes weaker than that in the case of horizontal installation, and the deformation amount of the vibration damper 9 in the Y direction is small, so that the chassis 5 can be held at a predetermined position. it can.

In the above description, the coil spring which is the elastic holding means is used only in one direction (Y direction) and the holding force is variable. However, the elastic means having the holding force in two directions or three directions is used. It is needless to say that the chassis may be held at a predetermined position by providing a varying means for varying the holding force in the direction based on the command from the direction detector.

As described above, according to the present invention, by providing the position detecting means for detecting the installation direction of the chassis and the changing means for changing the holding force of the elastic holding means based on the signal of the position detecting means, the chassis is provided. The installation direction of each of the chassis is detected by the position detection means, the variable means is operated based on the signal of the position detection means, and the elastic force of the elastic holding means is adjusted in the installation direction of each chassis (for example, horizontal and vertical). It is possible to provide an information recording / reproducing apparatus which can be varied so as to hold the chassis at a predetermined position where the deflection is small and a vibrating space can be taken, and which has a vibration isolation effect in both the horizontal and vertical directions.

Further, an information recording / reproducing apparatus having a loading means is provided by providing a varying means that engages with a loading means for moving the information recording medium to a predetermined position in the apparatus and can change the holding force of the elastic holding means by the movement of the loading means. It can be easily applied without complicating the device, and its effect is great.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an information recording / reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a side view of essential parts showing a mechanism for varying the holding force of an elastic holding means of the present invention, and FIG. 4 is a side view showing the operation of the disc clamp portion of the present invention, and FIG. 5 is an enlarged plan view of the main portion of the cartridge holder portion showing the cartridge holding mechanism of the present invention. FIG. 6 is a plan view of an essential part showing an optical head locking mechanism of the present invention, FIG. 7 is a side view for explaining a driving force transmitting means of a rotary lid, and FIG. 8 is an installation state diagram showing an installation state of the apparatus, FIG. 9 is a sectional view showing a conventional example. 1 ... Cartridge, 2b ... Optical disc, 2 ... Exterior frame, 3 ... Front panel, 4 ... Rotating lid, 5 ...
Chassis, 6a …… Cartridge positioning pin, 6b …… Cartridge height determining pin, 7 …… Disk motor table, 8 …… Optical head part, 9 …… Vibration damper, 10 …… Coil spring, 11 …… Spring force adjustment Pin, 12 …… Cartridge holder, 14 …… Slide cam, 38 …… Clamp, 41…
… Gear group, 42 …… loading motor, 44 …… optical head lock arm, 50 …… shutter driver, 56 …… direction detector, 57a, 57b …… position detection switch.

Claims (2)

[Claims] 1. A chassis having information recording / reproducing means for recording / reading information on / from an information recording medium, vibration damping means for damping the chassis from external vibration, and elastic holding means for holding the chassis at a predetermined position. An information recording / reproducing apparatus comprising: position detecting means for detecting the installation direction of the chassis; and variable means for varying the holding force of the elastic holding means based on a signal from the position detecting means. 2. A variable means having a loading means for moving the information recording medium to a predetermined position in the apparatus, engaging with the loading means, and capable of varying the holding force of the elastic holding means by the movement of the loading means. (1) The information recording / reproducing device described in