JP3443143B2 - Magneto-optical disk recording / reproducing apparatus and drive switching method thereof - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magneto-optical disk recording / reproducing apparatus for reproducing a signal from a disk by using an optical pickup, and recording a signal on the disk by using a magnetic head, and loading and recording of the disk. The present invention relates to a drive switching method for switching the head up and down and sliding between an optical pickup and a recording head.

[0002]

2. Description of the Related Art As such a magneto-optical disk recording / reproducing apparatus, one shown in FIG. 8 has been proposed. It should be noted that the disc traveling direction at the time of disc loading is the front, and the disc ejecting direction is the rear. Further, as shown in FIG. 9, the disc (60) is housed in the cartridge (6), and the shutter (61) of the cartridge (6) is opened at the time of recording / reproducing, so that the disc (6)
Although 0) is exposed, detailed description of the opening / closing mechanism of the shutter (61) is omitted.

A side plate (80) is erected on the base chassis (8) shown in FIG. 8 (a), and a guide groove (86) is horizontally formed in the side plate (80). Inside the side plate (80), a main chassis (1) and a sub-chassis (4) mounted on the main chassis (1) are provided, and the cartridge (6) is mounted on the sub-chassis (4). It The protrusion (10) protruding from the side of the main chassis (1) fits into the guide groove (86), and the main chassis (1) and the sub chassis (4) are slidable along the guide groove (86). Has become. The projecting piece (12) projects upward from the front end part of the main chassis (1), and the shaft (13) projects perpendicularly to the traveling direction of the disc (60) from the tip end part of the projecting piece (12). .

A pickup (7) is placed on the front end of the base chassis (8), and the front end of the pickup (7) is
A support member (70) is attached. An L-shaped support arm (5) is pivotally supported on the upper end of the support member (70), and a recording head (50) is attached to the free end of the support arm (5). A turntable (72) is provided on the side of the pickup (7).

At the time of recording, as shown in FIG. 8 (b), with the cartridge (6) mounted on the sub-chassis (4),
The main chassis (1) slides forward along the guide groove (86). The disc 60 is placed on the turntable 72. The shaft (13) abuts the lower end of the support arm (5), and the support arm (5) pivots downward about the pivotal support. Recording head
The (50) contacts the disc (60), and the pickup (7) moves in the radial direction of the disc (60) for recording.
The sliding of the main chassis (1) and the sliding of the pickup (7) are performed by separate and independent motors (not shown) linked to each other.

[0006]

In the conventional structure, one motor is provided for raising and lowering the recording head (50) and loading the main chassis (1), and further, the pickup (7) and the recording head (50) are provided. One motor is used for sliding. Therefore, since two motors are used, it is complicated to match the control timings of the two motors, and the weight of the entire apparatus is increased. It is an object of the present invention to perform sliding of the pickup (7) and the recording head (50), loading of the disk and raising and lowering of the recording head (50) by one motor.

[0007]

Magneto-optical disc recording and reproducing apparatus SUMMARY OF THE INVENTION is mounted disk (60), the chassis for raising and lowering the recording head (50) deployed on the base chassis (8), Shah
Meshes with the chassis rack to load the chassis in the loading direction
First gear train (9) to reciprocate and pickup (7)
Engage with the rack (74) and slide the pickup (7)
Install the second gear train (91) and the transmission gear (21) at the tip to
Gears connected to the motor (23) and downstream of both gear trains (9) (91)
Between the gear trains (9) and (91)
A cam plate (3) having an idler lever (20) for transmitting rotational power of (23) and a cam groove (30) into which a shaft (22) provided on the free end side of the idler lever (20) fits is formed. It has.
The cam groove (30) has locking grooves (30b) at both ends for restricting rotation of the idler lever (20), and the cam plate (3) has an actuator (33) for reciprocally moving the cam plate (3). Are connected. The transmission gear (21) meshes with either gear train (9) (91).
Actuator (33) is in contact with cam plate (3)
Move the shaft (22) into the locking groove (30b), and
The transmission gear (21) regardless of the rotation direction of the
(9) Keep the state of meshing with (91).

[0008]

In the magneto-optical disk recording / reproducing apparatus and its drive switching method of the present invention, the chassis slides and the recording head (50) moves up and down, the pickup (7) and the recording head (5).
In order to switch the sliding of (0), the idler lever (20) is rotated to engage the transmission gear (21) with either of the gear trains (9) (91). The idler lever (20) is either gear train (9) (91)
The shaft (22) is positioned at the end of the locking groove (30b) in the state of being engaged with, and the actuator (33) operates so that the shaft (22) fits in the locking groove (30b). 3) Move back and forth. That is, when the disc (60) is inserted into the device, the drive switching means engages with the idler lever (20) while the transmission gear (21) of the idler lever (20) meshes with the first gear train (9). ,
When the disk loading is completed, the drive switching means is released, the transmission gear (21) is engaged with the second gear train (91), and the pickup (7) is slid. When removing the disc (60) from inside the device, the drive switching means should be the idler lever (20).
After sliding the pickup (7) by engaging with, the drive switching means is released from the idler lever (20), and the transmission gear
Engage (21) with the first gear train (9) and pull out the chassis.

[0009]

The disk (60) is loaded and the recording head (50) is moved up and down, and the pickup (7) and the recording head (5) are
Since the sliding of (0) is switched by the idler lever (20), the disc loading and the sliding of the pickup (7) can be performed by one motor (23) via the idler lever (20). Also, the actuator (33)
Of the gear train (9) (91) by the transmission gear (21)
Since the shaft (22) of the idler lever (20) is fitted in the locking groove (30b) in the state of contact with the idler lever (20), even if the transmission gear (21) is normally reversed. Is restricted from rotating, and the power of the transmission gear (21) is smoothly transmitted to one of the gear trains (9) and (91).

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. As shown in FIG. 1, a pair of side plates (80) (80) are erected on both ends of the base chassis (8) to support both side plates (8).
Between 0) and 80), main chassis (1) and sub chassis (4)
Is provided. Sub chassis (4) is the main chassis
(1) It is mounted on the rear end portion so that it can slide back and forth. An opening (14) is formed at the front end of the main chassis (1),
The sub-chassis (4) is mounted on the rear end of the main chassis (1) so as not to cover the opening (14). On both sides of the main chassis (1), long holes (15) extending back and forth are opened,
A retaining piece (42) protruding from the lower surface of the subchassis (4) is fitted into the elongated hole (15) (see FIG. 4), and the subchassis is formed.
(4) is slidable back and forth on the main chassis (1).

As shown in FIG. 3, a tension spring (41) is stretched between the main chassis (1) and the sub-chassis (4), and the sub-chassis (4) is placed relative to the main chassis (1). Is urged forward. From the front end of the main chassis (1), a pair of projecting pieces (12) (12) are projected, and both projecting pieces (12) (12)
A shaft (13) is installed between them.

As shown in FIGS. 1 and 3, the sub-chassis
(4) The rear end of the main chassis (1) is bent downward to form a projecting piece (43), which penetrates the through hole (16) formed in the main chassis (1) to the rear side of the main chassis (1). It is extended. Sub chassis
Both sides of (4) are bent upward to form side pieces (44) (44), and the width between both side pieces (44) (44) is set to be substantially equal to the width of the cartridge (6). ing. At the rear of the right end of the subchassis (4), there is a stopper (40) that abuts the rear edge of the right side plate (80).
Is provided. Bending pieces (17) and (17) project downward from both sides of the center of the main chassis (1), and projections (11) project outward from the bending piece (17). In front of the bending pieces (17), (17), the bending pieces (18), (18) project upward, and the projections (10) project outward from the bending pieces (18).

Guide grooves (81) (82) are formed in both side plates (80) (80) of the base chassis (8). Protrusion (10)
(11) is fitted in the guide grooves (81) (82), respectively, and the main chassis (1) is slidable along the guide grooves (81) (82). The guide groove (81) is the upper horizontal part from the rear to the front.
(81a), a glide part (81b) vertically lowered from the front end of the upper horizontal part (81a), and a lower horizontal part (81c) extending forward from the lower end of the glide part (81b). Similarly for the guide groove (82),
(82a), downhill part (82b), and lower horizontal part (82c). On the right side plate (80) with respect to the disc loading direction,
Three push-in switches (83) (84) (85) are provided.
That is, in the vicinity of the front end of the lower horizontal portion (81c) of the guide groove (81), the first pushing switch (83) is provided with the lower horizontal portion (82) of the guide groove (82).
c) In the vicinity of the rear end, the second push switch (84) is
(82a) Third push switches (85) are provided outside the side plates (80) near the rear end. In the disk loading standby state, the protrusion (11) pushes the third push-in switch (85).

(Pickup) As shown in FIG. 1, the pickup (7) is mounted on the base chassis (8) in the same manner as the conventional one.
Is slidably provided in the left-right direction. The pickup (7) is located near the center of the position where the disc (60) is placed, and in the standby state, the detection switch (71) provided on the left side of the pickup (7) is pushed. pick up
On the left side of (7), there is provided a turntable (72) which is fitted to the disc (60) and rotates the disc (60). L-shaped support member (70) linked to the pickup (7)
A support arm (5) is pivotally supported on the upper end of the same as in the conventional case. A recess (5a) is formed at the lower end of the support arm (5), and a recording head (50) is attached to the other end. As shown in FIG. 2, the support arm (5) is urged to rotate upward by a torsion spring (51) fitted in a pivotal support portion and abuts against a stopper (73) of the support member (70). There is.

As shown in FIG. 4, inside the bent piece (17) of the main chassis (1) and below the main chassis (1),
Rack pieces (19) are mounted with the flanks facing inward. The tooth surface of the rack piece (19) is connected to the first gear train (9) provided on the base chassis (8), and as shown in FIG. The step gear (90) is a rack piece (19).
It is located inside the base chassis (8). On the other hand, the pickup (7) is located inside the base chassis (8) with respect to the first gear train (9) and has a rack (74) at its rear end. The rack (74) meshes with the second gear train (91), and the downstream two-stage gear (92) is spaced apart from the two-stage gear (90) and arranged in parallel with each other.

(Idler mechanism) The idler mechanism (2) shown in FIG. 5 is provided between the two-stage gears (90) and (92). The idler mechanism (2) has an idler lever (20) whose central part is pivotally supported.
The idler lever (20) is provided with a transmission gear (21). The idler lever (20) has a transmission gear (21).
Rotates so as to selectively come into contact with either one of the two-stage gears 90, 92. On the other free end side of the idler lever (20), a shaft (22) projects downward. A cam plate (3) is provided near the free end, and the shaft (22) is fitted in a cam groove (30) formed in the cam plate (3).
As shown in FIG. 2, the cam plate (3) is mounted on the block base (31) on the base chassis (8) so as to be slidable back and forth. The cam plate (3) is urged forward by the tension spring (32), and the stopper (3
It is in contact with 4). An actuator (33) is provided behind the cam plate (3), and the actuator (33) is
Pull the cam plate (3) backwards against the tension spring (32). The actuator (33) is composed of, for example, a solenoid.

FIG. 6 is a side view showing the structure of the idler mechanism (2). A motor (23) is provided below the center of the idler lever (20), and a gear (2) is attached to the rotary shaft (24) of the motor (23).
5) is tightly fitted. From the top of the gear (25),
(26) protrudes, and the tip of the shaft (26) is attached to the idler lever (20).
Through and through the upper surface of the idler lever (20), and is secured by a retaining washer (200). Between the idler lever (20) and the gear (25), the boss (27) is fitted on the shaft (26),
The protrusion (27a) protruding from the upper end surface of the (27) is fitted to the idler lever (20) to rotate the boss (27) and the idler lever (20) integrally. The boss (27) has a cylindrical shape, the bottom surface is
(26) penetrates the opening (27b) provided in the lower surface of the boss (27).

A slip member (29) is provided between the boss (27) and the upper surface of the gear (25), and a compression spring (28) is gently attached to the shaft (26) in the hollow portion of the boss (27). Wrapped around. Compression spring (2
The boss (27) and the slip material (29) are urged downward by 8), and the slip material (29) is pressed against the upper surface of the gear (27).
The transmission gear (21) is a two-stage gear and includes an upper stage gear (21a) and a lower stage gear (21b) having a diameter smaller than that of the upper stage gear (21a). Upper gear (21
a) is meshed with the gear (25) on the motor (23) side.

When the motor (23) rotates, the gear (25) also rotates. Since the slip member (29) is in pressure contact with the gear (25), the rotation of the gear (25) causes a sliding friction to generate a slip torque. The slip torque causes the boss (27) to rotate, and the rotational power is transmitted to the idler lever (20) via the protrusion (27a). When the transmission gear (21) contacts the two-stage gear (90) (92), the rotation of the idler lever (20) is restricted, and the rotation of the motor (23) is transmitted via the gear (25) and the transmission gear (21). Is transmitted to the two-stage gears (90) (92). If there is no mechanism for generating the slip torque as described above, the gear (25) and the transmission gear (21) only rotate, and the idler lever (20) does not rotate. That is, the structure shown in FIG. 6 is provided in order to smoothly rotate the idler lever (20) by the slip torque.

(Cam groove) The cam groove (30) of the cam plate (3) into which the shaft (22) of the idler lever (20) fits is constructed as shown in FIG. The cam groove (30) is a circular arc groove (30) whose radius is the distance from the center of rotation of the idler lever (20) to the shaft (22).
a) and a linear locking groove (30b) (30b) opened forward from both ends of the arc groove (30a) are integrally provided.

When the actuator (33) is not operating, the shaft (22) is fitted in the circular arc groove (30a) and the idler lever (2
0) is rotatable. When the actuator (33) is retracting the cam plate (3), the shaft (22) fits into either locking groove (30b) as shown in FIG. 7 (a) or 7 (b). The rotation is restricted. Shaft (22) has either locking groove (30b)
The transmission gear (21) meshes with any of the two-stage gears (90) and (92) when engaged with the gear. In the disk loading standby state, as shown in FIG. 7 (b), the shaft (22) is located at the left end of the arc groove (30a).

(Disc Loading) The disc 60 is loaded and the signal is reproduced or recorded as follows. As shown in FIG. 7 (a), when the actuator (33) is actuated and the cam plate (3) is pulled backward, the shaft (22) fits into the left engagement groove (30b).
Next, the gear (25) is rotated counterclockwise by the motor (23). The idler lever (20) tries to rotate counterclockwise due to the slip torque, but the rotation is restricted by the shaft (22) fitted in the locking groove (30b). Therefore, the rotational power of the gear (25) is transmitted to the first gear train (9) via the transmission gear (21), and the rack piece (19) slides forward.

Due to the sliding of the rack piece (19), the main chassis (1) shown in FIG. 1 slides forward along the guide grooves (81) (82). The contact between the protrusion (11) and the third push-in switch (85) is released, the protrusions (10) and (11) reach the lower ends of the sliding parts (81b) and (82b), respectively, and the protrusion (11) moves to the second position. Press the push switch (84). The central portion of the disk (60) in the cartridge (6) mounted on the subchassis (4) fits on the tip of the turntable (72).

(During reproduction) At this time, as shown in FIG. 3 (b), the shaft (13) approaches the recess (5a) of the support arm (5), but the support arm (5) does not rotate. , The recording head (50) also keeps rising. The stopper (40) of the sub chassis (4) is
It abuts against the edge of the side plate (80), and the forward sliding is restricted. The signal from the second push-in switch (84) is transmitted to the actuator (33) shown in FIG. 7, and the actuator (33) releases the pull-in. Cam plate (3) is tension spring (32)
As a result, the shaft (22) slides forward, and the shaft (22) comes out of the locking groove (30b) and is positioned at the left end of the circular arc groove (30a).

Since the motor (23) and the gear (25) continue to rotate counterclockwise, the idler lever (20) rotates counterclockwise and the shaft (22) slides in the circular arc groove (30a). To do. As shown in FIG. 7 (b), the transmission gear (21) meshes with the two-stage gear (92).
The rotation power of the motor (23) is transmitted to the rack (74) of the pickup (7) via the second gear train (91), and the pickup is picked up.
(7) slides to the right. The pickup (7) is separated from the detection switch (71), and the turntable (72) is rotated. When the detection switch (71) is turned off, the actuator (33) retracts the cam plate (3) again, and the shaft (22) moves to the right side engaging groove.
It fits into (30b). In this way, the pickup (7)
Moves from the inner circumference to the outer circumference of the disc (60), that is, to the right in FIG. 7B, and the disc (60) is reproduced.

(Stop playing) Stop playing the disc (60),
In order to pull out the disc (60), after stopping the rotation of the turntable (72), the motor (23) is rotated in the clockwise direction. Since the shaft (22) is fitted in the locking groove (30b), the idler lever (20) does not rotate. The pickup (7) slides to the left and pushes the detection switch (71). By the signal from the detection switch (71), the actuator (33) releases the retracted state, and the shaft (22) can slide along the circular arc groove (30a). Since the motor (23) continues to rotate in the clockwise direction, the idler lever (20) rotates in the clockwise direction and the transmission gear (21) becomes the two-stage gear (90) as shown in FIG. 7 (a). Mesh with each other. The shaft (22) reaches the left side of the circular arc groove (30a), and the rack piece (19) slides backward, contrary to the loading state. Main chassis
The disc (60) is ejected as (1) and the sub-chassis (4) retract. As shown in FIG. 3 (a), when the protrusion (11) pushes in the third push-in switch (85), the retreat of the main chassis (1) stops.

(During Recording) During disk recording, the motor (23) and gear (25) rotate counterclockwise to perform disk loading, as in disk reproduction. Figure 3 (c)
As shown in, the stopper (40) of the subchassis (4) is attached to the side plate.
With the main chassis (1) in contact with (80), the tension spring (4
Go further against 1). The protrusion (10) advances the lower horizontal portion (81c) and pushes the first push-in switch (83). The shaft (13) pushes the recess (5a) of the support arm (5), and the support arm (5) rotates about the pivotal support. The recording head (50) moves downward and contacts the upper surface of the disk (not shown). The signal from the first push switch (83) is applied to the actuator (3
3) and the actuator (33) releases the retracted state. The cam plate (3) slides forward by the tension spring (32), and the shaft (22) is located at the left end of the circular arc groove (30a).

Since the motor (23) and the gear (25) continue to rotate counterclockwise, the idler lever (20) rotates counterclockwise and the shaft (22) slides in the circular arc groove (30a). Then, as shown in FIG. 7 (b), the transmission gear (21) meshes with the two-stage gear (92). The rotation power of the motor (23) is transmitted to the rack (74) of the pickup (7) via the second gear train (91), and the pickup is picked up.
(7) slides to the right. When the detection switch (71) is separated from the pickup (7) and the detection switch (71) is turned off,
Electric current is applied to the recording head (50). Since the recording head (50) and the pickup (7) are connected via the supporting member (70), they slide integrally. In this way, recording on the disc (60) is performed. The operation after the recording is stopped is the same as the operation after the reproduction is stopped.

As described above, the loading of the disk (60), the raising and lowering of the recording head (50), and the sliding of the pickup (7) and the recording head (50) can be switched by the idler lever (20). One motor (23) via lever (20) for disc loading and pickup
The sliding of (7) can be performed. That is, the number of motors can be reduced by one from the conventional configuration, and the motor (23) can be controlled easily. In addition, the transmission gear can be
Since the shaft (22) of the idler lever (20) is fitted in the locking groove (30b) while the (21) is in contact with any of the gear trains (9) and (91), the transmission gear Regardless of which direction the (21) is rotated, the idler lever (20) is restricted from rotating, and the power of the motor (23) is smoothly transmitted to the gear trains (9) and (91).

The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope. The configuration of each part of the present invention is not limited to the above-mentioned embodiment, and it goes without saying that various modifications can be made within the technical scope described in the claims.

[Brief description of drawings]

FIG. 1 is a perspective view of a magneto-optical disk recording / reproducing apparatus.

FIG. 2 is a side view in which a part of the same is cut away.

FIG. 3 is a side view showing a loading state of the main chassis.

FIG. 4 is a front view of the magneto-optical disk recording / reproducing device taken along the line AA of FIG.

FIG. 5 is a plan view showing a peripheral portion of an idler mechanism.

FIG. 6 is a side view of the idler mechanism.

FIG. 7 is a plan view showing the operation of the idler mechanism.

FIG. 8 is a side view showing the operation of a conventional magnetic recording / reproducing apparatus.

FIG. 9 is a perspective view of a cartridge.

[Explanation of symbols]

(1) Main chassis (7) Pickup (20) Idler lever (30) Cam plate

Continuation of front page (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 21/12-21/14 G11B 17/04 G11B 21/00-21/06

Claims (2)

(57) [Claims] 1. A recording head (5) on which a disk (60) is placed.
Place the chassis for raising and lowering (0) on the base chassis (8) , engage it with the rack of the chassis, and load the chassis
The first gear train (9) that moves back and forth in the
Engage with the rack (74) of the top (7) and slide the pickup (7).
Install the second gear train (91) to move and the transmission gear (21) at the tip.
Gears, linked to the motor (23), downstream of both gear trains (9) (91)
Selectively rotate between the gears of any of the gear trains (9) (91)
The idler lever (20) that transmits the rotational power of the motor (23) to the
A magneto-optical disk recording / reproducing apparatus for reproducing or recording by loading the chassis and setting the disk (60) at a predetermined position and then sliding the pickup (7) and the recording head (50). The idler lever (20) is provided with a cam plate (3) having a cam groove (30) into which a shaft (22) provided on the free end side is fitted. The cam groove (30) is provided at both ends of the idler lever (20). The cam plate (3) has a locking groove (30b) for restricting the rotation of the (20), an actuator (33) for reciprocating the cam plate (3) is connected, and a transmission gear (21) is used. State of meshing with the gear train (9) (91)
Then, the actuator (33) moves the cam plate (3).
The shaft (22) into the locking groove (30b) and rotate the motor (23).
Regardless of the rolling direction, the transmission gear (21) is engaged with the gear train (9) (91).
A magneto-optical disk recording / reproducing device characterized by maintaining a matched state . 2. A recording head (5) on which a disk (60) is placed.
First gear train (9) that slides the chassis to raise and lower (0)
And a second gear train (91) that slides the pickup (7) and the recording head (50), and is arranged between both gear trains (9) and (91), and a transmission gear (21) is provided at the tip. An idler lever (20) that selectively rotates between the gear trains (9) and (91) and transmits the rotational power of the motor (23) to one of the gear trains (9) and (91), and an idler lever.
A cam stopper with a locking groove (30b) that restricts the rotation of (20).
When setting the rate (3) and inserting the disc (60) into the device, the idler lever
While engaging the transmission gear (21) of (20) with the first gear train (9), engage the idler lever (20) with the locking groove (30b).
Keep the meshing state of the transmission gear (21) and the first gear train (9), and release the engagement between the idler lever (20) and the locking groove (30b) in the disc loading completed state to move the transmission gear (21) to the first position. 2 gear trains (9
When the disk (60) is taken out from the device by bringing it into contact with (1) and sliding the pickup (7), the idler lever (20) is engaged with the locking groove (30b) to pick up the pickup (7).
Slide the idler lever (20) and the locking groove (30b).
A drive switching method for a magneto-optical disk recording / reproducing apparatus, characterized in that the engagement is released, the transmission gear (21) is engaged with the first gear train (9), and the chassis is pulled out .