JPS63228456A - Device for loading disk cassette - Google Patents

Abstract

PURPOSE:To pull a cassette (disk) holder into a disk device without fail by interlocking the cassette holder and a regulating member supporting body with the backward and forward movement of a single moving cam body, and executing the backward and forward and elevating motions. CONSTITUTION:A cassette holder 30 is supported so that the backward and forward movement and the elevating movement can be executed to a driving motor. A regulating member supporting body 50 is at least elevatably supported to the driving motor, and the cassette holder 30 and the regulating member supporting body 50 are interlocked and driven with a single moving cam body 60 to move in the backward forward directions to the driving motor. Thus, the structure is simple, a disk cassette can be loaded to the spindle without fail, the fitting and removing operations of the disk cassette are extremely facilitated and miniaturization can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to magnetic recording and reproducing snowmaking, particularly to a disk cassette loading device in a magnetic disk device for recording or reproducing still image information and the like.

"Prior Art and its Problems" In magnetic disk snowmaking, which is used for example in electronic still cameras to record or reproduce still image information, etc., a disc-shaped rotating magnetic recording medium (magnetic A disk cassette (still video floppy) containing the disc) is used.

In such a magnetic disk device, it is an important issue to reliably and simply mount the magnetic disk on the rotating drive shaft (spindle) of its drive motor (spindle motor) and to remove the mount. In particular, in magnetic recording and reproducing devices intended for recording or reproducing still image information, in addition to the conventional basic mechanism of transporting a disk cassette, there is also a mechanism for reliably and accurately attaching the center hub of the magnetic disk to the rotational drive shaft. is necessary. As an example of this mechanism, a rotary drive shaft is fitted into the center hole of a center hub of a magnetic disk, and a magnet on the rotary drive shaft side attracts a suction plate provided on the center hub, thereby chucking the rotary drive shaft. There is a mechanism to do so.

However, with this magnetic chucking mechanism, if the disk cassette is simply installed in a predetermined position, the center hub of the magnetic disk and the rotational drive shaft will be attracted by magnetic force (
Since the window does not come close enough to the center hub, we cannot expect a perfect chucking jig. Therefore, when installing a disk cassette, a hub holding member is required to forcibly insert the center hub into the rotation drive shaft.Moreover, this hub holding member does not allow the center hub to be forcibly inserted into the rotation drive shaft when the disk cassette is installed. It must be moved away from the center hub to avoid rotational load.

Furthermore, when the magnetic disk is magnetically chucked to the rotary drive shaft, the recording head position of the magnetic disk is detected using PG (Phase), which is a part of the adsorption plate provided on the center hub.
Generator) This is done by detecting magnetic flux leakage from the yoke with a PG yoke sensor. However, since magnetic flux leakage from the PG yoke sensor causes a weak image, in order to perform accurate position detection, the PG yoke sensor must be correctly positioned on the rotation trajectory of the PG yoke and maintained at a constant interval. For compatibility, high positional accuracy is required for the magnetic head and PG yoke sensor.

Furthermore, since the distance between the PG yoke sensor and the magnetic disk or disk cassette is narrow, the PG yoke sensor must be retracted to avoid damage to the PG yoke sensor when inserting the disk cassette into the cassette transfer holder.

Since this magnetic disk has higher density recording and rotates at a higher speed than conventional floppy disks, the head touch system has changed from the method of holding the magnetic disk between a pad and a magnetic head to placing a regulating plate instead of the pad. The current trend is toward a system in which a magnetic disk is run between a magnetic head and this regulating plate to reduce rotational load and obtain stable head touch. This regulating plate enters the butt entry hole of the single-disk cassette when the disk is driven to rotate, and is placed near the magnetic disk, but its position relative to the magnetic head and magnetic disk, especially its height and parallelism, must be highly accurate. Furthermore, since the regulating plate is not so small compared to the entrance hole of the disk cassette, it is desirable to move and place the regulating plate in the space where the disk cassette and magnetic disk are installed.

In order to satisfy all of the above requirements, the loading device had to be complicated and large.

The above-mentioned conventional technology and its problems will be explained more specifically. Figures 4 to 6 are, for example, Utility Model No. 60-5165
This figure shows a conventional loading device proposed in No. 0 and others. The disk cassette 10 has a rectangular case 1
1 and a magnetic disk 12 housed in this case 11.A center hole 14 is bored in the center of the case 11 to expose a center hub 13 of the magnetic disk 12, and a hole 14 is formed in a part of the periphery of the case 11. , magnetic head entry hole 15
(See FIG. 6) and a pad entry hole 16 are formed on the front and back sides, and these entry holes ]5, ]6 are normally covered by a slidable opening/closing shutter 17.

Rough case 11 has positioning holes 18 and 19 on both the top and bottom sides.
(Only the top side is shown).

The loading device fits the center hub 13 of the disk cassette 10 to the spindle 96 of the spindle motor, and inserts the magnetic head into the magnetic head insertion hole 15 and the pad into the pad insertion hole 16, and is fixed to the base 80. A holder 82 into which the disk cassette 10 is inserted and a pad mounting plate 83 are supported between the left and right fixing plates 81. The holder 82 and the pad mounting plate 83 each have rollers 84.85 on their sides, and the rollers 84.85 fit into vertical guide grooves 86.87 formed in the fixing plate 81, respectively.

Further, the pad mounting plate 83 has a pad 88 at a position corresponding to the pad entry hole 16 of the disk cassette 0 correctly inserted into the holder 82, and is attached to the center hub 13.
A PG yoke sensor 97 is provided at a position corresponding to . The pad 88 and the PG yoke sensor 97 can enter into the holder 82 through a bore hole (not shown) in the holder 82.

A cam plate 89 that is movable in the direction of the arrow in the figure runs along the fixed plate 81, and the rollers 84 and 85 move along this cam plate 89.
The cam grooves 90 and 91 are also fitted into the upper and lower flat parts 90a and 9, respectively.
01), 91a, 911), and an inclined portion 90C191c that communicates therebetween. The cam plate 89 has a rack 89a at its lower end that engages with the drive gear 92, and when the drive gear 92 rotates forward and backward, it reciprocates in the direction of the arrow in the figure. Reference numerals 93 and 94 indicate long grooves and pins that regulate the direction and range of movement of the cam plate 89.

Therefore, in this conventional device, when the cam plate 89 is moved to the right in Fig. 5 by the drive gear 92, the cam groove 90
．． The rollers 84 and 85 are fitted into the flat portions 90a and 91a of the holder 82, respectively, and the holder 82) butt mounting plate 83 is located at the raised position (unloading position M).

In this state, when the cam plate 89 is moved to the left in the figure by the drive gear 92 after inserting the disk cassette 10 into the holder 82 and bringing it into contact with the stopper 82a, the rollers 84 and 85 move to the flat part. From 90a, 91a to the inclined parts 90c, 91c, the holder 82 and the pad mounting plate 83 descend vertically according to the vertical guide grooves 86, 87.

Then, when the rollers 84, 85 reach the flat portions 90b, 91t), the lowering stops. In this state, the pad 88 fixed to the pad mounting plate 83 enters the pad entry hole 16 of the disc cassette 10, and the disc cassette 10! The PG yoke sensor 97 is pressed toward the magnetic head 95, and the PG yoke sensor 97 approaches the center hub 3 (see FIG. 6). Further, the center hub 13 of the magnetic disk 12 is attached to a spindle 96. This is the loading state. The transition from the loading state to the unloading state is performed by the reverse operation described above.

Therefore, in the conventional device described above, the holder 82 (disk cassette) 0), the pad 88 and the PG yoke sensor 9
7 is positioned by using the flat portions 90b and 9 of the cam grooves 90 and 91.
1b descending accuracy, flat parts 90b, 91b and roller 84.
85 and the movement accuracy in the height direction of the cam plate 89, the positional accuracy in the height direction of the disk cassette 10 and the pad 88 can be highly controlled by the cumulative error of each component. was difficult.

Moreover, since the magnetic disk [2] is simply brought close to the spindle 96 by the holder 82 via the case 111v, there are cases where the hub 13 and the spindle 96 are not fitted accurately or completely. For this reason, the reality is that it has not been possible to meet the demands for high-2 degree recording and for extending the life of magnetic disks.

``Object of the Invention'' The present invention solves the problems of the conventional disk cassette loading device described above, has a simple structure, allows the disk cassette to be securely mounted on the spindle, and is extremely easy to load and remove the disk cassette. An object of the present invention is to provide a disk cassette loading device M that can be downsized.

``Summary of the Invention'' The present invention provides a cassette holder in which a magnetic disk is housed in a case having a magnetic head entry hole and a disk restriction member entry hole, in which a disk is inserted and removed using a disk force, and a cassette holder that allows the disk restriction member to enter the cassette holder. Loading of a disk cassette comprising a regulating member support supporting a disk regulating member entering a hole, and sandwiching a magnetic disk between a magnetic head and a disk regulating member in a loading state in which a cassette holder is loaded onto its disk drive motor. In the device, the cassette holder is supported so as to be movable forward and up and down relative to the drive motor, and the regulating member support is supported so as to be at least movable up and down relative to the drive motor, and the cassette holder and the regulating member support are The drive motor is characterized in that it is driven in conjunction with a single moving cam body that moves in the front and rear directions with respect to the drive motor.

"Embodiments of the Invention" Examples shown in the attached drawings will be described below. 1st
Figures 3 to 3 show embodiments of the present invention.

A spindle motor is fixed to the base, and its spindle 2 protrudes upward, and a magnetic head 3 for recording and reproducing protrudes from the vicinity thereof. Spindle 2 is
It is provided at a position where it fits into the center hub 13 of the correctly loaded magnetic disk 2 of the disk cassette 10, and is provided with a magnetic chucking mechanism (not shown). Roughly, the base 1 includes a positioning pin 4.5 that fits into the positioning hole 8.19 of the disk cassette 10, a height restriction pin 6 that comes into contact with the case 11 to restrict the height, a restriction plate 41, and a PG yoke. A pair of height regulation bins 7.7 for regulating the height of the sensor 42, a pair of positioning dowel receivers 8.8 for determining their plane positions, and a front holder 20.
A pair of restraints 9.9 are provided to prevent the front and back movement of the front and back.

The cassette holder for storing the disk cassette ICI is fixed to a front holder 20 that serves as an insertion opening for the disk cassette 10, a holder body 3° that is slidable in the insertion direction (horizontal direction) of the disk cassette 10, and this holder body 30f. A flat rectangular cylindrical disk case is formed with the holder body 30.
and a rear holder 35 forming a holder.

The front holder 20 has a shutter for the disk cassette 10]
a shutter opening/closing lever 21 for opening and closing the regulating bin 9 .
A pair of guide members 22, 22 are provided which fit into the holder 20rFr and guide the holder 20rFr vertically so as to be movable, but prevent the holder 20rFr from moving back and forth.

The holder main body 30 has front holder 20 on its left and right bottom surfaces.
A guide plate 23.2 extending in the cassette insertion direction from both sides of the
Front holder guide receiver 31.
31, and disk cassette holders 32, 33 are attached to the center of the front and rear edges thereof to elastically press and hold the inserted disk cassette 10. At the rear of the holder main body 30, there is a disc cassette 1.
Stopper 3 that comes into contact with the insertion tip of 0 to regulate the insertion position
4, and a pair of horizontally spaced guide dots 36 and 37 are respectively planted on both sides. The rear holder 35 is attached to the rear lower surface of the holder main body 30. Although not shown, the stopper 34 is provided with a sensor such as a microswitch that detects whether the disk cassette 10 is correctly inserted.

A regulating member base 40 is disposed above the holder main body 30. This regulating member base 40 has a magnetic head 3
A regulating plate 41 for stabilizing the contact (head touch) between the magnetic disk 12 and the magnetic disk 12 and a PG yoke sensor 42 for detecting the recording head value M of the magnetic disk 12 are attached.

The butt base 40 is movable parallel to the rotational axis of the magnetic disk 12 to the regulating member support 50 via the two pillars 43, 43 installed therein and the holes 56, 56 into which they are fitted. The regulating member support 50 is suspended by a compression spring 44 fitted to the support column 43, and is biased in a direction away from the regulating member support 50, that is, toward the magnetic disk]2. According to the guide mechanism of the regulation plate 4] and the PG yoke sensor 42, the positional accuracy of these can be improved.

A hub presser 51 for forcibly fitting the center hub 13 of the magnetic disk 12 to the spindle 2 is attached to the lower surface of the regulating member support 5o, and a pair of guide pins 54 are spaced apart horizontally on both sides. 55 are planted in each.

The hub holder 5] has legs 51a, 51a split into two parts that abut the center hub 3 at two points in the diametrical direction across the center of the center hub 13, and a holder main body 30 in the middle.
It has a corner 51b that comes into contact with. And this hub presser 5
1, the rear end is rotatably attached to the regulating member support 50 via a shaft 52, and the leg portion 51a is attached by a torsion spring 53.
is urged to rotate in the direction toward the spindle 2.

A movable cam body 60 is disposed above the holder main body 3Q and the regulating member support body 50. The movable cam body 60 includes a flat plate 61 and parallel cam plates 62 and 62 provided on the lower surface of the flat plate 6 so as to sandwich the holder main body 3o and the regulating member support 50 therebetween.

Each cam plate 62 has a guide bin 36 of the holder main body 30.
A drive cam groove 63.64 into which the guide member 37 is fitted, and a drive cam groove 65.66 into which the guide dongle 54.55 of the regulating member support 5o is fitted are formed, respectively. Each drive cam groove 63, 64, 65, 66 has inclined portions 63a, 64a, 65a, 66a inclined with respect to the cassette insertion direction, and horizontal portions 63b, 64b, 65b parallel to the cassette insertion direction.
, 66b (see Figure 2), roughly each cam plate 6.
2 has a pair of guide bins 6 spaced apart in the horizontal direction.
7.68 has been planted.

In addition, the lower surface of the flat plate 61 outside the cam plate 62, 62 fixing portion (this is the rack 69 extending parallel to the cassette insertion direction)
are provided for each.

Fixed cam plates 7o and 70 are arranged outside the cam plates 62 and 62, and the fixed cam plates 70 and 70 are fixed to the base 1. Each fixed cam plate 7o, 70 has a guide cam groove 7.
], 72.73.74 are formed. Each guide cam groove 71, 72, 73 has horizontal portions 71a, 72a, 73a extending parallel to the cassette insertion direction, and vertical portions 71b, 72b, 73 extending downward at right angles to the cassette insertion direction.
The guide cam groove 74 consists of only a horizontal portion extending parallel to the cassette insertion direction.

The guide bin 36 of the holder main body 30 is fitted into the drive cam groove 63 and the guide cam groove 71, the guide bin 37 is fitted into the drive cam groove 64 and the guide cam groove 72, and the guide bin 54 of the regulating member support 50 is fitted into the drive cam groove 63 and the guide cam groove 71. The guide pin 55 is fitted into the groove 65 and the guide cam groove 73, and the guide pin 55 is fitted into the drive cam groove 6.
6, the guide bin 67 of the movable cam body 60 is fitted into the guide cam groove 73, and the guide bin 68 is fitted into the guide cam groove 7.
4 has been inserted. Therefore, the movable cam body 6o is supported by the fixed cam plate 70, and the regulating member support 50 and the holder main body 30 are supported by the movable cam body 60 and the fixed cam plate 70. By the way, the regulating member support body 50 of this embodiment
Although one guide don 55 does not fit into the guide cam groove 74, this is simply due to design considerations.

On the outer surface of the roughly fixed cam plates 7o and 70, gears 75a,
Gear train 75 for driving the moving cam body consisting of 75b and 75c
is installed. The upper gear 75a of the gear train 75 meshes with the rack 69 of the movable cam body 60, and the lower gear 75a engages with the rack 69 of the movable cam body 60.
c and 75c are connected to rotate together by a shaft (not shown), and roughly one of the gears 75c is engaged with a gear of a motor (not shown). Therefore, when the motor rotates, the rotation is caused by the gears 75c, 7.
5b, 75a to the rack 69, the movable cam body 60 fits into the guide cam grooves 73, 74, and horizontally moves to the front (second
(left and right on the diagram) is moved.

The loading device of this embodiment having the above configuration operates as follows.

In the unloading state where the disk cassette 10 has not been inserted yet, as shown in FIG. It is in.

When the disk cassette 10 is inserted from the front holder 20 into the holder main body 30 and the rear holder 35 in this state, the shutter lock release mold 21a of the shutter opening/closing lever 21 engages with the shutter 17 during insertion, and as the disk cassette 10 is inserted, The entrance holes ]5, ]6 are exposed.

When the disk cassette 10 is inserted until it contacts the stopper 34, a sensor (not shown) detects this and starts the motor, and the movable cam body 60 moves to the guide cam of the fixed cam plate 70 via the gear train 75 and the rack 69. When the movable cam body 60, which is horizontally moved (backward) to the right along the grooves 73 and 74, moves to the left, the holder body 30 (and the guide bin 36
．． 37 is the inclined part 63a, 64a of the drive cam groove 63.64
horizontal parts 71a, 72 of the guide cam grooves 71, 72.
It moves horizontally to the right while being restrained by a.

Similarly, in the regulating member support 50, the guide bin 54.55 is pushed by the inclined parts 65a, 66a of the drive cam groove 65.66, and is restrained by the horizontal part 73a of the guide cam groove 73 and the horizontal guide cam groove 74. Move horizontally to the right.

When the roughly moving cam body 60 moves to the right, the guide bins 36 and 37 of the holder body 30 move into the guide cam grooves 7], 7.
Since it reaches the vertical parts 71b and 72b of 2, the inclined part 83a,
64a and is restrained by the vertical parts 71b and 72b, it descends vertically while maintaining a horizontal state.At the same time, the guide bin 54 of the regulating member support 50 also reaches the vertical part 73b of the guide cam groove 73. , is pushed by the inclined parts 65a and 66a, restrained by the vertical part 73b, maintains a horizontal state, and descends vertically at equal intervals with the holder body 30.The front holder 20 also descends integrally with the holder body 3o. .

When the holder main body 30 is lowered by a predetermined amount, the positioning holes 18 and 19 of the case 11 of the disk cassette 10 fit into the positioning dongs 4.5 of the base 1, and the center hub 13 of the magnetic disk 12 fits into the spindle 2. [Case] 1 comes into contact with the height regulating bell 6 of the base 1 and stops descending, thereby regulating the height and position. In this state, the guide dons 36.37 are attached to the horizontal portions 63b and 6 of the drive cam grooves 63.64.
4t), only the edge moving cam body 60 moves to the right. Guide holes 36.37 are horizontal parts 631), 64
1), therefore, the holder body 30 is held to that extent 1 so as not to move vertically or horizontally.

Even if the holder main body 30 stops descending, the regulating member support 5
0 indicates that the guide bin 54 is still in the inclined portion 73 of the guide cam groove 73.
Since it is at point a, continue descending. During this downward movement, the legs 51a, 51a of the hub holder 51 come into contact with the center hub 13 of the magnetic disk 12, and press-fit it into the strand 2. The center hub 13 is magnetically chucked to the spindle 2 by a magnetic chucking mechanism (not shown). When the regulating member support 5o roughly descends, the corner 51 of the hub presser 51
b comes into contact with the holder main body 3o, the hub presser 51 rotates counterclockwise, and the foot portion 51a separates from the center hub 13.

Further, in the process of lowering the regulating member support 50, the positioning pin 45.45 of the regulating member base 4o fits into the positioning fin receiver 8.8 of the base 1, and the horizontal position is regulated and the lower surface of the regulating member base 4o is regulated. is held at a predetermined height by contacting the height regulating bin 7.7 of the base 1. At the same time, regulation plate 4
1 enters into the pad entry hole 16 of the disk cassette 1o through the opening 30a formed in the holder body 30 and contacts the magnetic disk 12 while being held at a predetermined plane position and height, and the PG yoke sensor 42 is opening 30alF
r, approaches the center hub 13, and is carefully held in a predetermined position. In this state, the guide bins 54, 55 reach the horizontal portions 65b, 66b of the drive cam body 65, 66, and only the movable cam body 60 moves to the right. Guide bin 54.
55 fits into the horizontal portions 65b and 86b, so that the regulating member support 50 is held at that position so as not to move vertically or horizontally.

Loading is completed with the above operations. Unloading (unloading) is performed by performing the opposite operation to the above operation, that is, by rotating the drive motor in the opposite direction.

In the above embodiment, the regulating member support 50 is connected to the holder main body 30.
(After moving horizontally, it descends and the holder body 3
Although the configuration approaches 0, the drive cam groove 63.6
4, so that the regulating member support 5Q does not move while the holder main body 30 is moving in the horizontal direction, and starts descending only after the holder main body 30 starts descending. You can also do that.

"Effects of the Invention" As is clear from the above description, the loading device of the present invention supports the cassette holder by allowing it to move back and forth and move up and down relative to the drive motor. The cassette holder and the regulating member support are linked to the back and forth movement of a single movable cam body to cause the front holder and the regulating member support to move up and down, respectively. , it is possible to reliably pull the cassette holder (disk holder) into the inside of the disk device. In addition, according to the present invention, both the cassette holder and the regulating member support can be driven by simply driving a single movable cam plate, thereby providing a simple and compact disc loading device with a reduced number of movable members.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the main parts of the loading device of the present invention, and Fig. 2A shows the positional relationship between the holder main body and the regulating member support in an asilated state. The side view and Figure 2B are side views showing the companion in the 0-loading state, and Figures 3A, 3B, and 3C show the operation of the hub presser in the unloading position, loading process, and loading position. 4 is a perspective view showing an example of a conventional loading device; FIG. 5 is a view taken in the direction of arrow V in FIG. 4; and FIG. 6 is a cross-sectional view taken along line VI-■ in FIG. It is a diagram. 1...Base, 2...Spindle, 3...Magnetic head, 4.5...Positioning bin, 6...Disk cassette height regulation bin, 7...-PG yoke sensor height Regulation bin, 8... Positioning bin receiver, 9... Front holder back and forth movement regulation bin, 10... Disc cassette,
11... Case, 12... Magnetic disk, 13...
・Senku hub, 15...Magnetic head entry hole, 16...
・Bud entry hole, 17...Shutter, 20...Front holder, 30...Holder body, 35...Small holder, 3
6.37... Guide don, 4o... Regulation member base, 41-... Regulation plate, 42... PG yoke sensor (recording head position detection section J), 50-... Regulation member support, 5
DESCRIPTION OF SYMBOLS 1...Hub holder, 51 a-foot part, 51 b--corner part, 54.55--guide bin, 60--movable cam body, 61--cam plate, 62.63.64 .65...
Drive cam groove, 67.68... Guide don, 69-...
Rack, 70... Fixed cam plate, 71... Guide cam groove. Patent applicant: Asahi Optical Industry Co., Ltd. Agent: Kunio Miura Shigeto Matsui Yoshimi Sasayama Figure 2A "C" Figure 2B Figure 3A Figure 1 R Figure 3B Figure 3C

Claims (3)

[Claims] (1) Supports a cassette holder into which a disk cassette containing a magnetic disk is inserted and removed from a case having a magnetic head entry hole and a disk restriction member entry hole, and a disk restriction member that enters the disk restriction member entry hole of this cassette holder. In a disk cassette loading device, a magnetic disk is sandwiched between a magnetic head and a disk regulating member in a loading state in which the cassette holder is loaded onto its disk drive motor. The cassette holder and the regulating member support are supported so as to be movable back and forth and up and down relative to the drive motor. A disk cassette loading device characterized in that it is driven in conjunction with a single moving cam body that moves. (2) In claim 1, the regulating member support includes a hub pressing member that presses the center hub of the magnetic disk toward the drive motor, and the hub pressing member is rotatable on the regulating member support. The center hub is pivoted on the shaft and the tip is urged to rotate in the direction of rotation toward the center hub, and in the process of the regulating member support moving toward the drive motor, the tip contacts and presses the center hub, and then the intermediate portion A disk cassette loading device in which the disk cassette contacts the cassette holder and its tip rotates in a direction away from the center hub. (3) The disk cassette loading device according to claim 1 or 2, wherein the regulating member support further supports a recording head position detecting member of the magnetic disk.