JPH0416278Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a recording or reproducing device using a rotating record carrier, such as a magnetic disk recording or reproducing device.

[Conventional technology]

In a recording or reproducing device that records or reproduces information using a rotating magnetic disk as a record carrier, it is important to mount the magnetic disk accurately and reliably with respect to the rotating drive unit so as not to cause eccentricity. . In other words, if the magnetic disk is attached unreliably to the rotation drive unit, problems may occur in the contact of the recording or reproducing magnetic head with the magnetic disk (for example, an increase in spacing loss), and eccentricity may occur. If the head and the track are in the same position, a problem arises in that a misalignment occurs between the head and the track, resulting in deterioration of the reproduction characteristics.

As a means to eliminate these drawbacks, a device as shown in FIG. 1 has been proposed. This utilizes the pressure force and magnetic attraction between the center hub provided at the center of the magnetic disk and the drive shaft.To explain its mechanism, 1 indicates the cassette; A flexible sheet-like magnetic disk 2 is housed inside. A hub 3 made of synthetic resin or the like is provided at the center of the magnetic disk 2, and a magnetic plate is fixed to the back side of the disk 2 with the hub 3 in between. The cassette 1 is provided with upper and lower windows 1a and 1b, into which a stabilizing plate for stabilizing the disk 2 can enter. The recording or reproducing magnetic head 7 is opposed to the recording surface of the disk 2 through the lower window 1b. Reference numeral 5 denotes a spindle that is rotationally driven by a disk rotation motor (not shown), and the end face 5b of the flange portion 5a
The height of the magnetic disk 2 relative to the head 4 is determined by the above-mentioned magnetic plate coming into contact with the magnetic disk 2 . A ring-shaped permanent magnet 6 is provided within the flange portion 5a of the spindle 5, and attracts the above-mentioned magnetic plate. Note that circular openings 1c and 1d are provided on the upper and lower surfaces of the cassette 1 in correspondence with the hub 3.

The above-mentioned hub 3 is formed with an engagement hole 3a for the spindle 5, and two slope parts 3b and a spring part 3c are provided here. It is attached so that it comes into pressure contact with the The disk 2 is integrally connected to the spindle 5 and rotates by the pressure contact force between the hub 3 and the spindle 5 and the attractive force of the permanent magnet 6, and the recording or reproduction of signals is performed by the aforementioned head 7. be.

In the mounting method described above, if the pressing force between the slope portion 3b of the hub 3 and the circumferential surface of the spindle 5 is large, the attraction force of the permanent magnet 6 will cause the hub 3 to be moved to the end surface 5b of the flange portion 5a. There may be cases where proper positioning cannot be performed. This is because it is affected by the dimensional accuracy of the spindle 5 and hub 3, the finishing condition, the environmental temperature, etc.
If the installation is incomplete in this way, problems with the head 4 and disk 2 facing each other (increased paging loss, etc.) may occur, resulting in deterioration of the recording and playback characteristics, or the disk 2 may be damaged by the stabilizer described later. There is a risk of accidents such as accidents.

This problem can be solved, for example, by pressing the hub 3 of the disk 2 against the flange 5a of the spindle 5 when loading the cassette 1. However, in order to reduce the load on the spindle 5 when the disk rotates, it is necessary to fix the biasing member before the disk rotates.

An example of such a device is shown, for example, in Japanese Patent Application No. 142524/1983 filed by the present applicant. That is, in the apparatus disclosed here as an embodiment, a cassette holder and an outer cover for the cassette holder are rotatably provided on the apparatus body chassis, and a disk hub biasing member is disposed on the ceiling of the outer cover, for example. The holder is moved from the cassette insertion position to the recording or playback position by closing the outer cover, and at this time, the biasing member presses and biases the disk hub to force it onto the spindle. Then, when the outer cover is locked by the outer cover locking member, the biasing member is released by a control member provided on the locking member (first embodiment), or when the outer cover is closed and the outer cover is closed, the biasing member is released. In this second embodiment, when the cover is locked, a cam provided on the locking member temporarily operates the biasing member to mount the disc.

[Problem that the invention attempts to solve]

The present invention is intended to provide an improvement to the apparatus having the structure shown as an example in the aforementioned Japanese Patent Application No. 58-142524 filed by the present applicant.

That is, when locking the record carrier storage section (e.g., the above-mentioned cassette holder) with the locking member (e.g., the locking member for the outer cover described above) in a predetermined position for recording or reproduction, If the device is configured such that the biasing member for attaching the record carrier (for example, the biasing member for the disk hub described above) is released or at least temporarily activated by a control member interlocked with the locking member. If the control member remains interlocked with the locking member even when the storage unit is unlocked by the locking member to take out the record carrier, the energizing member will not be able to record even when the record carrier is taken out. By acting on the mounting portion of the carrier, mechanical trouble is likely to occur, and there is a great fear that the record carrier or the biasing member may be damaged.

[Means for solving problems]

In view of the above-mentioned problems, the present invention has been devised so that the record carrier mounting biasing member is connected to the locking member so as to lock the record carrier storage portion in a predetermined position for recording or reproduction using the locking member. In a device that is released or at least temporarily activated by a control member that is linked to The above-mentioned problem is solved by providing means for blocking the air.

[Effect]

By means of the above-mentioned blocking means, when the locking of the storage section by the locking member is released, the interlocking movement between the control member and the locking member is cut off, and the biasing member is moved against the mounting portion of the record carrier. This is to prevent it from working again.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described.

In the following, an example will be shown in which the present invention is applied to an apparatus using a magnetic disk housed in a cassette as shown in FIG. In this case, as shown in Fig. 1, the attachment means by magnetic attraction using a magnetic plate on the magnetic disk side and a permanent magnet on the spindle side can make this unnecessary, but on the other hand, there is nothing that prevents their combined use. However, an example of a case where these are used together will be shown below.

Referring to FIG. 2, numeral 11 indicates the main body of the recording or reproducing device, and the main body 1
1 is provided with a spindle 5 as the above-mentioned rotation drive unit and a magnetic head 7 for recording or reproducing, which are rotatable and movable, respectively. 12 is the main body part 1
1 is a hinge shaft provided on the ear portion 11a, 15 is a lower stabilizing plate 16 is a side plate provided on the main body portion 11,
Two springs 13 and 14 are wound around the hinge shaft 12, and the head 7 projects through an opening 15a in the lower stabilizer plate 15.

Reference numeral 31 designates a cassette holder serving as a record carrier housing section for receiving the magnetic disk cassette 1 shown in FIG. It is rotatably mounted. The holder 31 has an opening 31f at one end for receiving the cassette 1, and the opening 31f
Then, cassette 1 is inserted. Openings 31a and 31 provided on the upper and lower surfaces of the holder 31
b are for receiving the upper stabilizing plate described below and the lower stabilizing plate 15 described above, respectively, and the openings 31d and 31c are for receiving the flange part 5a of the spindle 5 and the biasing part of the biasing member described below, respectively. It is meant to be accepted. 32, when loading the cassette,
An elastic biasing member made of, for example, synthetic resin, for pressing and biasing the hub of the disk 2 housed in the cassette 1 inserted into the holder 31 against the flange portion 5a of the spindle 5. The holder 31 has a hub biasing portion 32a at the top thereof, and is rotatably supported by a shaft 33 at a pair of cut-out portions 31g on the upper surface of the holder 31. It is rotated in the direction. The tail end 32b of the biasing member 32 is connected to the holder 31.
It extends somewhat from the end on the side of the cassette insertion opening 31f. However, in this case, the tail end 32b
are formed and positioned so as not to impede insertion of the cassette 1 through the opening 31f.

Reference numeral 35 denotes an outer cover, and the outer cover 35 is rotatably attached to the main body 11 at its pivot portion 35a by the hinge shaft 12 described above. Lock pins 36a and 36b are implanted on the front end side surface 35c of the outer cover 35, and a hook member 38 for the holder 31 is also provided.
Reference numeral 37 denotes an upper stabilizing plate attached to the ceiling of the outer cover 35, which, together with the lower stabilizing plate 15 provided on the main body 11 side, sandwiches the disk 2 inside the cassette 1 from above and below, so that when the disk 2 rotates, to prevent vibration and deformation. In this case, the positions of the stabilizers 37 and 15 and the disk 2 are set so that an appropriate air layer is formed between them.

The arms of the spring 13 disposed on the hinge shaft 12 are applied to the holder 31 and the outer cover 35, respectively, and apply a rotational force between them in the opening direction. The spring 14 applies a counterclockwise rotational force to the outer cover 35 by having one arm of the spring 14 applied to the main body 11 and the other arm of the spring 14 to the outer cover 35 . In this case, when the outer cover 35 rotates counterclockwise, the engagement piece 35b
It is regulated at a predetermined position by colliding with b,
Further, the clockwise rotation of the holder 31 relative to the outer cover 35 is regulated at a predetermined position by a portion of the holder 31 engaging with the locking member 38 of the outer cover 35.

The locking mechanism for the outer cover 35 will now be described with reference to FIGS. 5-7.

In the figure, 17 is a lock that can slide left and right by engaging the implant pin 18 on the side plate 16 of FIG. 2 in its slot 17a.
The lever is biased to the left in the figure by a spring 19 hooked between the spring hanging portion 17b and a fixed pin 29 on the side plate 16. When the lock lever 17 slides to the left, the pins 36a and 36b are held between the lock lever 17 and the restricting portion 11c for the pins 36a and 36b of the outer cover 35 provided on a part of the main body 11, respectively. It has lock claws 17C and 17d that lock the outer cover 35 by doing so.

20 engages the lower bent portion 17e of the lock lever 17 with the stepped portion 20a at its tip, thereby moving the lever 17 against the spring 19 to the right position shown in FIG. This is a holding lever that is held in the locked position, and is rotatably supported by a shaft 21 on the side plate, and by a spring 22 hooked between this spring hanging portion 20c and a fixed pin 23 of the side plate 16, as shown in the figure. It is energized clockwise. Furthermore, as shown in FIG. 5, the holding lever 20 has a stepped portion 20 at its tip.
When the bent portion 17e of the lock lever 17 is engaged in the state shown in FIG.
1, and when the pin 36b of the outer cover 35 is lowered until it is regulated by the regulating part 11c, as shown in FIG. The bent portion 1 of the lock lever 17 by the tip rear portion 20a is rotated counterclockwise by pushing the tail end 20b.
7e is configured to release the lock.

Reference numeral 24 controls the disk hub biasing member 32 mounted on the holder 31 described above, that is, in this embodiment, the biasing member is activated when the holder 31 is set to the recording or reproducing position as the outer cover 35 is closed. 32 and then release the locking of the outer cover 35 by the locking lever 17 by engaging the pin 25 on the locking lever 17 in its slot 24a A spring 26 is capable of sliding left and right with respect to the lever 17 and is hung between a pin 27 on the control member 24 and a pin 28 on the locking lever 17.
is biased to the right on the lever 17. As shown in FIG. 5, the control member 24 engages with the tail end 32b of the biasing member 32 when the holder 31 is lowered, and forces it counterclockwise in the figure against the spring 34 shown in FIG. By rotating the disk hub 3 to
It has a bent operation part 24b for pressing and energizing the outer cover and releasing the lock lever 17 when the lock lever 17 for locking the outer cover is slid to the left. Further, as shown in FIG. 7, the right side surface 24c of the operating portion 24b touches the left side surface of the tail end 32b of the biasing member 32 when the outer cover 35 is unlocked, that is, when the lock lever 17 is slid to the right. 32c, and this engagement causes the control member 24 to slide when the lever 17 is slid to the right.
The lever 17 is disengaged from the lever 17 against the spring 26, and is held at the position shown in FIG. No action is taken on the tail end 32b. Therefore, the right side surface 24 of the operating portion 24b of the control member 24
c and the left side surface 32c of the tail end 32b of the biasing member 32
constitutes means for interrupting the interlocking of the control member with the lock lever 17 when the outer cover 35 is unlocked. Furthermore, the control member 2
4's operation part 24b and the tail end part 32b of the biasing member 32
When engaged with the control member 24, the force of the spring 26 acting on the control member 24 causes the biasing member 32 to pivot clockwise around the pivot in FIG. 2, changing its position. In order to prevent this, a restriction portion 31h is formed on the upper surface of the holder 31 close to the right side surface of the tail end portion 32b of the biasing member 32. Further, the lock lever 17 is provided with an operating portion 17f,
The operating portion 17f extends outward through a slit 16a in the side plate 16, as shown in FIG. 2, and can be operated to release the outer cover lock.

In the above configuration, in order to load the cassette 1, the outer cover 35 is rotated counterclockwise about the hinge shaft 12 by the biasing force of the spring 14 against the main body 11 to open it, and one end 35b of the outer cover 35 is opened. It comes into contact with the side surface 11b of the main body part 11 and is stopped. In this case, the holder 31 attempts to rotate clockwise relative to the outer cover 35 due to the biasing force of the spring 13, but is restrained in the position shown in FIG. 3 by the hook member 38 provided on the outer cover 35. It will be like that.

In this case, the outer cover locking mechanism provided on the side plate 16 is held by the holding lever 20 with the locking lever 17 slid to the right against the spring 19, as shown in FIG. ing. Also, the biasing member 32 on the holder 31 is the spring 3
4, and its tail end 32b is in contact with the edge on the cassette insertion opening 31f side.

In this state, when the cassette 1 is inserted through the opening 31f of the holder 31 and the outer cover 35 is rotated clockwise around the hinge shaft 12 against the urging force of the spring 14, the holder 31 also rotates around the hinge shaft 12. The spindle 5 rotates in the same direction about the center, and at a predetermined position corresponding to the recording or reproducing position shown in FIG. Enter the matching hole 3a, and also lower stabilizer plate 15 and upper stabilizer plate 37
The openings 1b and 1a of the cassette 1 enter through the openings 31b and 31a of the holder 31, respectively. Also, at this time, the biasing member 32 has its tail end 3
2b comes into contact with the operating portion 24b of the control member 24 on the lock lever 17 (indicated by 32b' in FIG. 5), so that it is rotated counterclockwise against the spring 34, and its tip is biased. The part 32a is the holder 3
The disk hub 3 enters the holder 31 through the opening 31c of the cassette 1, and presses the disk hub 3 from above at the opening 1c of the cassette 1. As a result, the hub 3 presses against the end surface of the flange 5a of the spindle 5. It is pushed in until it is regulated by 5b, and is attached to the spindle 5. Furthermore, at this time, spindle 5
A permanent magnet 6 provided in the flange portion 5a attracts the magnetic plate 4 provided on the back side of the hub 3 with the disk 1 interposed therebetween. Further, at this time, if the amount of operation of the biasing member 32 by the operating portion 24b of the control member 24 is excessive with respect to the required pushing amount of the hub 3, this excess amount is
It is absorbed by the elastic deformation of 2 itself.

Now, after that, as shown in Fig. 5, the outer cover 35
When the tail end 20b of the holding lever 20 is pushed by the pin 36b and is rotated counterclockwise against the spring 22, the tip end step 20a comes off the bent part 17e and is locked. The lever 17 slides to the left by a spring 19, and its locking portions 17c and 17d are attached to the outer cover 35 as shown in FIG.
The pins 36a and 36b are connected to the regulating portion 1 of the main body portion 11.
1c, so that the outer cover 35 is locked in the closed state. Further, the control member 24, which is not related to the sliding of the lock lever 17 at this time, also slides to the left, and therefore, the biasing member 32 is moved by the spring 34 in order for the operating portion 24b to evacuate from below the tail end portion 32b. As a result, it rotates clockwise as shown by the two-dot chain line in FIG. 4, and stops at a position regulated by the ceiling of the outer cover 35. As a result, the hub 3 is released from the pressing force.

Next, to take out the cassette 1, the lock lever 17 is slid to the right through its operating portion 17f. At this time, as shown in FIG.
The operating portion 24b is connected to the tail end 32 of the biasing member 32.
is held against the rightward slide of the lock lever 17 in order to abut the side surface 32C of the lock lever 17;
Therefore, the action on the biasing member 32 is prevented. After that, the lock part 17 of the lock lever 17
In order to release the pins 36a and 36b from the pins 36a and 36b, the outer cover 35 is opened by the spring 14 (FIG. 7, 36a', 36b'), and the holder 31 is raised accordingly. . At this time, as the holder 31 rises, the biasing member 32 rises (FIG. 7, 32b'), so the control member 24 slides to the right by the spring 26.

It should be noted that when the lock lever 17 is slid to the right end, the holding lever 20 moves to the lock lever 1 at its tip step 20a under the action of the spring 22.
It will hold 7.

As described above, in this embodiment, when the outer cover 35 is unlocked, the control member 24 is disconnected from the lock lever 17 and is prevented from acting on the biasing member 32. This will prevent mechanical troubles during removal.

[Modified example]

As a modification of the above embodiment, a cam is attached to the operating section 24b of the control member 24 in accordance with the second embodiment of the earlier Japanese Patent Application No. 142524/1989 filed by the present applicant. The biasing member 32 may be temporarily activated by this cam when the lock lever 17 is slid to the left. Alternatively, deenergization may be performed by other means. however,
In either case, when the outer cover lock is released, the right side of the cam is released from the tail end 3 of the biasing member 32.
2b or the outer cover 3.
5 or a part of the holder 31, so that the linkage with the lock lever 17 is cut off.

〔effect〕

As described in detail above, according to the present invention, when the record carrier storage section is positioned at a predetermined position for recording or reproduction and the locking member is locked, the urging member for attaching the record carrier is engaged. In a device that is released or at least temporarily activated by a control member interlocking with a stop member, the biasing member does not act on the mounting portion of the record carrier when the record carrier is removed. Therefore, it is possible to prevent mechanical troubles from occurring, and to prevent the risk of damaging the record carrier or the biasing member, thereby making it possible to always safely take out the recorder.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a magnetic disk cassette and a device-side coupling part used in an embodiment of the present invention;
Fig. 2 is an exploded perspective view of an embodiment of the present invention, particularly the main parts related to the present invention; Figs. 3 and 4 are sectional views showing the holder in the raised and lowered states; Fig. 5; 6 and 7 are plan views for explaining the operation of the outer cover lock and biasing member operating mechanism in the second illustrated device. DESCRIPTION OF SYMBOLS 1...Magnetic disk cassette, 2...Magnetic disk, 3...Magnetic disk hub, 4...Magnetic head for recording or reproduction, 5...Magnetic disk rotating spindle, 11...Main body, 16...Side plate ,1
7...Lock lever, 20...Holding lever, 2
4...Control member, 31...Cassette holder,
32... energizing member, 35... outer cover.

Claims (1)

[Claims for Utility Model Registration] A rotary drive unit for rotating the record carrier; a record carrier storage unit movable to a predetermined position for loading the received record carrier into a recording or playback position; a biasing member for pressing and biasing the record carrier in the direction of the rotary drive unit in order to mount the carrier on the rotary drive unit; a locking member movable to a locking position that locks the record carrier storage section at the predetermined position; and a locking member configured to apply a pressing force to the record carrier when the record carrier storage section moves to the predetermined position. A recording or reproducing device comprising: a control member that controls the biasing member and releases the pressing force of the biasing member in conjunction with the movement of the locking member to the locking position.