JPH03290843A - Magneto-optical recorder - Google Patents

Abstract

PURPOSE:To miniaturize the device by fixing an excitation coil of a magnetic field generating means so as to make one pat of a cartridge holder a magnetic circuit. CONSTITUTION:The excitation coil 9a of the magnetic field generating means is fixed to the cartridge holder 2 in order to make one part of the cartridge holder 2 a magnetic circuit. That is, the magnetic field generating means is fixedly provided to the cartridge holder 2 in order to form the magnetic circuit in one pat of the cartridge holder 2. By this method, the need of a vertical moving mechanism for the magnetic field generating means as against the cartridge holder 2 is eliminated, so that the device is constituted by down-sizing in thickness at inexpensive cost, and moreover, since the cartridge holder is also served for the function of a yoke as well, the number of parts is decreased, and hence the reliability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cartridge holder into which a cartridge containing a magneto-optical disk is attached and detached, and a cartridge holder that engages and disengages from the magneto-optical disk in the cartridge through relative displacement between the cartridge holder and the cartridge holder. A means for rotating a magneto-optical disk, a means for injecting a laser beam onto the magneto-optical disk, a means for detecting reflected light from the magneto-optical disk, and a magnetic field generating means for applying a bias magnetic field to the magneto-optical disk. A laser beam is incident on the disk to raise the temperature of the incident part, and a bias magnetic field is applied to record the information carried by the laser beam or the bias magnetic field, and the information is recorded on the magneto-optical disk. The present invention relates to a magneto-optical recording device that reads information recorded on a magneto-optical disk by detecting reflected light from the magneto-optical disk.

[Conventional technology]

A magneto-optical recording device as described above, which is shown in the schematic plan view, side view, and perspective view of FIGS. 1O111 and 12, is known.

In No. 1 O to 12@, l is a device frame, 2 is a cartridge holder into which a cartridge containing a magneto-optical disk is attached and removed, and 3 is a spindle that engages and disengages with the magneto-optical disk in the cartridge by relative displacement with the cartridge holder 2. A rotating means such as a motor, 4 a collimating lens (not shown), a laser light source 4ax using a semiconductor laser or the like;
Laser light input means 5 includes a prism, a beam splitter, and an actuator 4c for holding an objective lens 4b for focusing the laser light onto the magneto-optical disk and for making the incident spot of the laser light follow the track of the magneto-optical disk. A means for detecting reflected light from a magneto-optical disk including an objective lens, an actuator, a beam splitter common to the laser beam input means 4, a beam splitter for a detection optical path (not shown), a condenser lens, an analyzer, etc., and a photodetector element 5a; Reference numeral 6 denotes a carriage equipped with a laser beam incidence means 4 and a reflected light detection means 5, and moves to a recording or reading track position of the magneto-optical disk so that the laser beam can be followed by an actuator, and 7 a guide for guiding the carriage 6. , 8 is a carriage moving means that includes a drive coil 8a and a magnetic circuit 8b and moves the carriage 6 along the guide 7, and 9 is a magnetic field generating means that applies a bias magnetic field to the magneto-optical disk.

As shown in FIG. 12, the device frame l is provided with a cartridge entrance 1a, and as shown in FIG.
inserted into a. The cartridge holder 2 is moved to a cartridge attachment/detachment position at the same level as the cartridge inlet/outlet 1a by an elevating means as described later, and a rotating means 3 in which a magneto-optical disk 11 as shown in FIG. The disk drive position shown in FIG. 11 is moved up and down into engagement.

Further, the cartridge holder 2 is provided with an operating member that opens the shutter 12 of the cartridge 10 and ejects the cartridge 10, as will be described later. Since the cartridge holder 12 is opened as shown in FIG. 14, the rotating means 3 comes into engagement with the magneto-optical disk 11 when the cartridge holder 2 is lowered to the disk drive position.

The magneto-optical disk 11 is engaged with the rotating means 3 and rotated by the rotating means 3 as described above, and receives a laser beam by the laser beam inputting means 4 mounted on the carriage 6 which is moved by the guide 7 and the moving means 8. When the laser beam is incident, a bias magnetic field is applied by the magnetic field generating means 9, and information carried by the laser beam or the bias magnetic field is recorded on the track. In order to perform this recording well, it is necessary to apply a strong bias magnetic field to the magneto-optical disk 11, and for this purpose, it is necessary to move the magnetic field generating means 9 up and down so as to bring it as close to the top surface of the magneto-optical disk 11 as possible. It was made possible.

In the conventional magneto-optical recording device as described above, the magnetic field generating means 9 is attached to the device frame 1 or the cartridge holder 2 via an elevating means, or is attached integrally to the cartridge holder 2 which is raised and lowered by an elevating means. It was made possible to move up and down. In the former method, the elevating means for lowering the magnetic field generating means 9 parallel to the surface of the magneto-optical disk 11 is complicated and requires precision, and furthermore, a means for interlocking this elevating means with the elevating means for the cartridge holder 2 is also required. I have the problem mentioned above. Also, in the latter method,
There is no problem with the former method, but the magnetic field generating means 9 is placed below the upper surface of the shutter 12 of the cartridge 10 on the magneto-optical disk 11.
If it gets too close, there is a problem that the shutter 12 will come into contact with the magnetic field generating means 9 and damage the magnetic field generating means 9 etc. when loading and unloading the cartridge 10 into the cartridge holder 2. .

In order to solve the above problems, the present applicant previously filed an invention for a magneto-optical recording device as shown in the schematic plan view and side view of FIGS. 15 and 16. The operations of this recording apparatus from insertion to ejection of the cartridge 10 will be briefly explained.

In FIGS. 15 and 16, the cartridge holder 2 is engaged so that the roller 2a rotatably provided therein is guided by the upper and lower guide grooves 1c of the fixed frame 1b that is integral with the device frame l,
Similarly, the cam followers 2b and 2c, which are rotatably provided, slide in the left-right direction on the fixed frame 1b because the cartridge holder 2 is biased downward by a spring 2d applied between the cartridge holder 2 and the fixed frame 1b. The lock pin 14a of the lock member 14 is engaged with the cam portions 13a and 13b of the slide frame 13, and the slide frame 13 is rotatably supported by the shaft pin ld implanted in the fixed frame lb. The cartridge is held in the illustrated cartridge loading and unloading position by being locked in position. This cartridge holder 2
The supporting frame 15 of the magnetic field generating means 9 is attached to the rising bent portion 2C.
is rotatably supported. The support frame 15 rotatably supports a core 9b holding an excitation coil 9a of the magnetic field generating means 9 on a support arm 15a extending to one side of the support shaft, and is supported by a spring 15b on the support arm 15a side, that is, the core 9b. 9b
The other side of the support shaft is provided with a spring that engages with an operating arm 1e that is integral with the fixed frame 1b when the cartridge holder 2 rises to the cartridge attachment/detachment position. A driven arm 15c having a driven pin 15d that rotates the support frame 15 in a direction in which the core 9b side rises against the bias of the driven arm 15b is extended. When the support frame 15 is rotated by the action arm io against the bias of the spring 15b as described above, the positioning pins 90 and 9d of the positioning pins 9c, 9d, and 9e implanted in the core 9b are attached to the core 9b. is in contact with the lower surface of the support arm 15a, and is biased to rotate by a spring 9f so that the magnetic field generating means 9 is supported above the upper surface of the cartridge holder 2. The rotational biasing by the spring 9f is such that when the support frame 15 rotates due to the biasing force of the spring 15b, the positioning pins 9c, 9d, and 9e come into contact with the upper surface of the cartridge holder 2, thereby causing the magnetic field generating means 9 to rotate. The bias is weaker than that of the spring 15b, which is parallel to the upper surface of the cartridge holder 2, that is, parallel to the surface of the magneto-optical disk 11, and is supported in a position below the upper surface of the cartridge holder 2. It is a force.

As is clear from the above, when the cartridge holder 2 is held in the cartridge attachment/detachment position, the magnetic field generating means 9 is supported above the upper surface of the cartridge holder 2, so that the cartridge IO generates a magnetic field when the cartridge IO is attached or detached. There is no risk of contact with means 9. Therefore,
When the cartridge IO shown in FIG. 13 is pushed into the cartridge holder 2 in this state from the cartridge entrance 1a of the device frame L, the leading edge 10a of the cartridge IO will be inserted into the cartridge holder 2.
The cartridge holder 2 is pushed by pushing the working pin 2g implanted at the tip of the working member 2f, which is slidably and rotatably attached to the upper plate part of the Fuji holder 2, against the biasing force of the biasing spring 2h of the working member 2f. 15th according to the guide groove 2i provided in the upper plate part.
Push toward the upper right in the diagram. As a result, the working pin 2g pushes the right end of the protruding edge of the shutter 12, which protrudes above the tip side 10a of the cartridge 10 in FIG. 13, to the left, and opens the shutter 12 as shown in FIG. TG14. , it comes to fall into the groove 10b of the tip side 10a. As a result, the working member 2f is held in a state in which the working pin 2g falls into the groove 10b, and the shutter 12 is held in the open state by the working pin 2g.

When the cartridge 10 is further pushed in, the distal end side 10a pushes the release pin 14b of the locking member 14, and the locking member 1
4 in the clockwise direction in FIG. 15 against the biasing force of the biasing spring 14C, so that the lock pin 14a of the locking member 14 is disengaged from the locked stepped portion 13c of the slide frame 13. . As a result, the slide frame 13 is pulled by the biasing spring 13d, and the straight groove 13 of the slide frame 13
Move to the left until the right ends of e, 13f, and 13g come into contact with guide pins 1f, 1g, and lh implanted in the fixed frame 1b. Thereby, the cartridge holder 2 is guided to the upper and lower guide grooves 1c of the fixed frame 1b according to the cam portions 13a and 13b of the slide frame 13, and is moved to the disk drive position where the magneto-optical disk 11 in the cartridge 10 engages with the rotating means 3. descend to When the cartridge holder 2 is lowered to the disk drive position, the driven pin 15d of the support frame 15 is released from the engagement arm 1e, the support frame 15 is rotated by the bias of the spring 15b, and the driven pin 9c of the core 9b is rotated. , 9
d and 9e come into contact with the upper surface of the cartridge holder 2, and the magnetic field generating means 9 is set at a position below the upper surface of the cartridge holder 2 and close to the upper surface of the magneto-optical disk 11.

Therefore, with the cartridge holder 2 in the disk drive position, the carriage moving means 8 moves the carriage 6, and the rotating means 3 moves the magneto-optical disk 11.
If the laser beam is rotated and a laser beam is incident by the laser beam input means 4, and a bias magnetic field is applied by the magnetic field generating means 9, the bias magnetic field acts strongly and good recording can be performed.

To take out the cartridge IO after recording from the recording device, press a switch (not shown) and turn the restoration motor 1.
This is done by rotating 6.

That is, when the restoration motor 1δ rotates, the operating gear 17 rotates once in the counterclockwise direction in FIG. 15 via a gear train (not shown), and the push pin 17a implanted in the operating gear 17
presses the pressed part 13h of the slide frame 13 and moves the slide frame 1
3 to the right against the bias of the spring 13d until it exceeds the position shown in the figure. Thereby, the cartridge 2 is attached to the cam portion 13a of the slide frame 13.

13b until it exceeds the illustrated position, and the magnetic field generating means 9 rotates against the urging force of the spring 15b by pushing the driven pin 15d of the supporting frame 15 with the operating arm 1e, so that the magnetic field generating means 9 rotates against the bias of the spring 15b. It is raised to a position above the upper surface of the holder 2. Then, when the slide frame 13 moves as described above, the lock member 14 is moved by the spring 14c.
When the lock pin 14a rotates to a position where it can engage with the locked stepped portion 13c of the slide frame 13 due to the bias of Even if the slide frame 13 attempts to return to the left due to the bias of the spring 13d, the slide frame 13 is locked in the illustrated position by the lock pin 14a. Therefore, the cartridge holder 2 and the magnetic field generating means 9 are also held at the illustrated positions. In addition, the opening/tsuk 1 old 4 pushes the distal end side 10a of the cartridge 10 to the left with the release pin 14b by the above-mentioned rotation, and the groove 10
The working pin 2g of the working member 2f is removed from b. When the working pin 2g escapes from the groove 20b, it returns to the position shown in FIG.
Press the tip side 10a of the O to eject the cartridge 10 so that most of it comes out of the cartridge entrance 1a. Even during this ejection, the cartridge 10 does not come into contact with the magnetic field generating means 9 because the magnetic field generating means 9 is held in the raised position as described above. After that, the cartridge 10 can be easily removed from the cartridge inlet/outlet 1a.

[Problem to be solved by the invention]

Even in the recording apparatus shown in FIGS. 15 and 16 as described above, there is still a problem that the structure is complicated and the apparatus becomes large because a mechanism for vertically moving the magnetic field generating means with respect to the cartridge holder is required.

Therefore, the present invention provides a cartridge holder 2 of the magnetic field generating means.
The first object of the present invention is to provide a magneto-optical recording device which can be miniaturized without requiring a vertical movement mechanism for the magneto-optical recording device, and which can further bring the magnetic field generating means 9 close to the surface of the magneto-optical disk 11. The second purpose is to provide information.

[Means to solve the problem]

The present invention provides a cartridge holder into which a cartridge containing a magneto-optical disk is attached/detached, a rotating means for the magneto-optical disk that engages and disengages from the magneto-optical disk in the cartridge by relative displacement with the cartridge holder, and a means for rotating the magneto-optical disk. In a magneto-optical recording device comprising a laser beam input means, a means for detecting reflected light from a magneto-optical disk, and a magnetic field generation means for applying a bias magnetic field to the magneto-optical disk, an excitation coil of the magnetic field generation means is attached to the cartridge holder. A magneto-optical recording device is characterized in that a magnetic circuit is fixed to a part of a cartridge holder,
This configuration achieves the first object, and furthermore, an elastic guide member is provided in the cartridge holder to prevent the cartridge from coming into contact with the magnetic field generating means when it is attached or removed, and the rotating means is provided on the rotating means side. The second object is also achieved by a configuration in which an abutment member is provided that presses the cartridge surface when engaging with the magneto-optical disk, causes the cartridge to compress the elastic guide member, and brings the magneto-optical disk closer to the magnetic field generating means. do.

[Effect]

That is, in the magneto-optical recording device of the present invention, a mechanism for vertically moving the magnetic field generating means relative to the cartridge holder is not required because the excitation coil of the magnetic field generating means is fixed so that a part of the cartridge holder forms a magnetic circuit. In addition, one cartridge holder that is relatively displaceable is provided with an elastic guide member that guides the cartridge in contact with the magnetic field generating means, and the other rotating means is provided with an elastic guide member that guides the cartridge so as to contact the magnetic field generating means. When the means engages with the magneto-optical disk, the cartridge is pushed against the cartridge surface to cause the cartridge to compress the elastic guide member, thereby bringing the magneto-optical disk closer to the magnetic field generating means.The structure includes an abutting member that brings the magneto-optical disk closer to the magnetic field generating means, thereby allowing the cartridge to be attached to and removed from the cartridge holder. It is possible to reliably prevent the cartridge and the magnetic field generation means from coming into contact with each other during recording, and to bring the magnetic field generation means close to the surface of the magneto-optical disk for recording on the magneto-optical disk.

〔Example〕

The present invention will be explained below using illustrated examples.

! 1, 2 and 3 are front views showing examples of cartridge holders used in the magneto-optical recording device of the present invention;
A bottom view and a side view, FIG. 4 is a sectional view of the frame of the cartridge holder, and FIGS. 5 and 6 are partial front views of the magneto-optical recording device of the present invention showing the cartridge holder in the cartridge attachment/detachment position and the disk drive position. , FIG. 7 and FIG. 8 are partial bottom views of a cartridge holder showing examples different from the cartridge holders shown in FIGS. It is a diagram. In Figures 1 to 9, the first
The same reference numerals as in FIGS. 0 to 15 indicate the same functional members or parts.

The cartridge holder 2 shown in FIGS. 1 to 3 has two parts cut and bent toward the bottom side of the upper plate center of the holder frame 2 made of a magnetic material such as an iron plate shown in FIG. 4. 2, the excitation coil 9a of the magnetic field generating means 9 is wound around the inner cut and bent portion 2k1m of 21, and the excitation coil 9a is fixed so that the outer circumference of the excitation coil 9a is sandwiched between the outer cut and bent portion 21. , magnetic field generating means 9
is fixed to the holder frame 2j, and the cut and bent portion 2 of the holder frame 2j includes the magnetic field generating means 9, and the upper plate portion 21 and the surrounding area are connected to the magnetic field generating means 9.
When a cartridge 1O as shown in FIG. 13 is inserted in the direction of the white arrow shown in FIG. 2.3 and ejected in the opposite direction,
As shown in FIG. 15.16, a guide member 2I11 is provided on the bottom screen side of the top plate of the holder frame 2J so that the 2+ does not come into contact with the excitation coil 9a or the cut and bent portion 2. The cartridge holder 2 is different from the cartridge holder 2 shown in FIG. In addition, 2n is a holder frame 2 by forming 21 on the cut and bent portion 2.
This is a hole created in the upper plate part of. A magneto-optical recording device using such a cartridge holder 2 does not require a mechanism for moving the magnetic field generating means 9 up and down with respect to the cartridge holder 2, so the device is simple. Since no parts are required for tightening, the device can be made thinner and smaller.

The cartridge holder 2 shown in FIGS. 5 and 6 uses a guide member 2m made of an elastic material such as a leaf spring. Then, in the recording apparatus, the cartridge holder 2 is in the 15.1st position.
As described in FIG. 6, when the magneto-optical disk 11 is lowered to the disk drive position in order to be engaged with the rotating means 3, the part that comes into contact with the lower surface of the cartridge IO in the cartridge holder 2 to prevent the cartridge 10 from lowering. A contact member 1i is provided on a fixed frame 1b. The contact member 1j contacts the cartridge 1o after the magneto-optical disk 11 and the rotating means 3 are engaged, and moreover, during the lowering of the cartridge holder 2. Therefore, even if the contact member 1i prevents the cartridge 10 from descending, the cartridge holder 2
As it descends to a predetermined position, the cartridge IO, which is prevented from descending, compresses the guide member 2m cut out from the elastic material,
As a result, the magnetic field generating means 9 can come closer to the top surface of the magneto-optical disk 11 than the top surface of the cartridge 10, as shown in FIG. In this example, it goes without saying that the compressive repulsive force of the elastic guide member 2m is made smaller than the tensile force of the spring 2d shown in FIG. 15.16, which biases the cartridge holder 2 downward.

In addition, in the arrangement of the abutting member 1i shown in FIG. 5.6, the lower bent portion I of the holder frame 2j that receives the cartridge 10 inserted into the cartridge holder 2 has a notch to avoid interference with the abutting member 1i. Needless to say, it is provided.

The holder frame 2j of the cartridge holder 2 may be of the type shown in FIGS. 7-9. This holder frame 2j has an inner cut and bent portion 2k cut and bent toward the lower surface of the upper plate of the holder frame 2j, and then rolled into a C-shape. The difference between the cartridge holder 2 in FIG. 7 and FIG. 8 is that the holder frame 2j
The only difference is the length of the outer cut and bent portion 21 in the cartridge attachment/detachment direction.

The magneto-optical recording device of the present invention may be one in which the contact member 1i is not provided, the guide member 2+11 may be made of a rigid body, or the cartridge holder 2 may be fixed and the rotating means 3 etc. may be moved up and down.

〔Effect of the invention〕

In the magneto-optical recording device of the present invention, the magnetic field generating means for applying a bias magnetic field to the magneto-optical disk is fixed to the cartridge holder so that a part of the cartridge holder forms a magnetic circuit. Since a vertical movement mechanism for the cartridge holder is not required, the device can be constructed at low cost, and can be constructed thinly.Furthermore, since the cartridge holder also serves as a yoke, the number of parts can be reduced and reliability can be improved.

[Brief explanation of the drawing]

1, 2, and 3 are a front view, a bottom view, and a side view of an example of a cartridge holder used in the magneto-optical recording device of the present invention, FIG. 4 is a sectional view of the frame of the cartridge holder, and FIG. 6 and 6 are partial front views of the magneto-optical recording device of the present invention showing the cartridge holder in the cartridge attachment/detachment position and the disk drive position, and FIG. 1g7 and FIG. 8 are examples different from the cartridge holder shown in FIGS. 1 to 3, respectively. FIGS. 9-9 are partial sectional views of the frame of the cartridge holder shown in FIGS. 7 and 8, and FIGS. Schematic configuration plan view, side view and perspective view,
13 and 14 are plan views showing an example of a magneto-optical disk cartridge used in the magneto-optical recording device of the present invention with the shutter closed and with the shutter open;
FIGS. 15 and 16 are a schematic plan view and side view of a magneto-optical recording device according to the prior application. l... Device frame la... Cartridge entrance/exit lb... Fixed frame 1c... Vertical guide groove 11
... Contact member 2 ... Cartridge holder 2
a...Roll 'l b, 2c...Cam follower 2d...Spring 2f...Action member 2g...Action pin 2h...Spring 21...
Guide groove 2J... on holder frame 2, 21...
Cutting and bending portion 2m...Guiding member 3...Rotating means 4...
Laser light incidence means 5...Reflected light detection means 7...Guide 9...Magnetic field generation means lO...Cartridge 11...Magneto-optical disk 13...Slide frame 13c...Locked stage Part 14...Lock member 6...Carriage 8...Carriage moving means 9a...m Magnetic coil 10a...Tip side 12...Shutter 13a, 13b-Cam part 13h...Pushed part

Claims (3)

[Claims] (1) A cartridge holder into which a cartridge containing a magneto-optical disk is attached/detached, a rotating means for the magneto-optical disk that engages and disengages from the magneto-optical disk in the cartridge by relative displacement with the cartridge holder, and a laser beam applied to the magneto-optical disk. In the magneto-optical recording device, the excitation coil of the magnetic field generation means is mounted on the cartridge holder. A magneto-optical recording device, characterized in that a cartridge holder is fixed so that a part of the cartridge holder serves as a magnetic circuit. (2) The cartridge holder is provided with an elastic guide member that prevents the cartridge from coming into contact with the magnetic field generating means when it is attached or removed, and the cartridge surface is provided on the rotating means side when the rotating means engages with the magneto-optical disk. 2. The magneto-optical recording device according to claim 1, further comprising an abutment member that causes the cartridge to compress the elastic guide member by pushing the cartridge, thereby bringing the magneto-optical disk closer to the magnetic field generating means. (3) The cartridge holder is vertically displaced between a cartridge attachment/detachment raised position and a disk drive lowered position where the rotating means engages the magneto-optical disk, and the positions of the rotating means and the abutting member on the rotating means side are fixed. A magneto-optical recording device according to claim 2.