JPS6177162A - Loading device of record carrier - Google Patents

Abstract

PURPOSE:To load a record carrier smoothly by operating a pressing means temporarily through the operation of a rotary driving member and loading the record carrier on the record carrier rotary driving member. CONSTITUTION:When a cassette holder 21 is elevated, a magnetic disk cassette 2 is inserted into the holder 21. A switch 28 is closed at the start of the lowering of the holder 21 and an FF32 is set, so that a disk rotary motor 7 is started. A switch 27 is closed with the end part of the holder 21, and a one-shot circuit 30 generates a pulse to power electrically on a solenoid 26. A rod 26a projects and an arm 23 rotates to press in the center hub 3 of a disk 1 with a pressure end part 23a so that it abuts on the reference surface of the flange part 8a of a spindle 8. When the pulse output of a circuit 30 is ceased, the rod 26a is lowered to release the arm from being pressed, and an FF32 is reset, so that the motor 7 stops.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a recording carrier loading device in a recording or reproducing apparatus using a disk-shaped rotating recording carrier such as a flexible magnetic disk, and particularly to a recording carrier loading device for loading a recording carrier onto a rotational drive member. It is related to the device.

[Background technology]

In a recording or reproducing apparatus using a disk-shaped rotating record carrier 5, for example a flexible magnetic disk.

A center hub is attached to the center of the magnetic disk, and the center hub is attached to a spindle that is rotationally driven by a disk rotation motor to rotate the disk. In this type of device, if the fit between the center hub and spindle is loose, the magnetic disk will not rotate normally during recording or playback operations, whereas if the fit is tight, the magnetic disk will not fit smoothly into the spindle. The problem arises that there is no 5. Therefore, a permanent magnet is installed on the flange of the spindle of the disk rotating motor, and a soft magnetic plate is installed on the underside of the center rehab hub, and the permanent magnet exerts a magnetic attraction force on the soft magnetic plate, thereby attracting the soft magnetic plate. A device that combines the two has been proposed. However, even in devices that perform this type of magnetic coupling, it is difficult to ensure that the center hub is accurately positioned on its reference plane, for example, the Franz portion of the spindle. However, it is difficult to position it on a predetermined mounting surface for holding it in a predetermined abutting state. Furthermore, in still image recording or reproducing devices that require strict mounting accuracy, several hundred grams of force is required to attach the center bald part to the spindle.

The size of the magnet becomes large, which hinders the reduction in size and weight of the device.

Furthermore, a device has been proposed in which a mechanism is provided on the top surface of the center hub to press the center hub against the spindle, as in the Fronby disk device, but in this device, the disk rotation motor is
Since the mechanism described above rotates while being pressed against the spindle, there is a drawback that the load is large and causes uneven rotation.

In order to eliminate this inconvenience, we have developed a device in which the record carrier is attached to the rotational drive member by pressing the ~ part of the record carrier, and then this pressure is released when the Q carrier is rotated. The applicant of this case has previously filed patent applications No. 58-50037, No. 58-82353, etc.

〔the purpose〕

The present invention relates to a further improvement of the earlier proposal made by the applicant, and an object of the present invention is to provide a record carrier loading device that allows for smoother and better mounting of a record carrier on a one-rotation drive member. That is.

Another object of the present invention is to provide a record carrier loading device capable of shortening the time required for so-called "standing" at the start of recording or recording.

Note that the recorder used in this specification refers to a disc-shaped rotatable record carrier in a magnetic, optical, or capacitive recording or reproducing method, and the record carrier rotation drive unit refers to a motor, etc. A drive source or a transmission member such as a spindle connected to the drive source.

[Explanation by example]

Hereinafter, the means taken in the present invention to achieve the above object will be illustrated and explained using the illustrated embodiments.

Here, we will explain an example in which the record carrier is a flexible magnetic disk.

An example of a conventional record carrier loading device will be explained with reference to FIG.

In FIG. 1, 1 is a flexible/pull magnetic disk, and 2 is a cassette in which a magnetic disk 1 is stored, which is formed of a box-shaped frame. 3 is a center hub fixed to the center of the magnetic disk 1; 4 is the center hub 3; 1 is an opening at the top and bottom of the corresponding cassette 2; 5 is an opening into which a magnetic nod, which will be described later, is inserted. The magnetic disc game 1 shown in FIG. 1 is loaded into a recording or reproducing JA device, for example, by the means described later, in a state where it is housed in a cassette 2, and recording or reproducing is performed.

FIG. 2 is an exploded cross-sectional view of an example of a conventional record carrier loading device, in which a cassette 2 is shown loaded with a two-ton chain line.
In the figure, members indicated by the same reference numerals as in Fig. 1 have the same structure and function as the members in Fig. 1.
1 is omitted. As for the other members, 6 is an internal shaft of the recording or reproducing unit 9H, 7 is a disk rotation motor attached to the storage unit 76, and 8 is a spindle of the disk rotation motor 7. Center hub 3 is a magnetic disk l
This is for attaching it to Le 8 with high accuracy.
It is made of synthetic resin. Reference numeral 9a represents a recording or reproducing head, and 9 represents a head carriage, which is moved in the directions of arrows C and D by means not shown. 10 is a soft magnetic plate fixed to the lower surface of the center hub 3, and 11 is a water magnet attached to the flange portion 8a of the spindle 8, which magnetically connects the center hub 3 and the spindle 8. There is. However, even with this device, there is a drawback that it is difficult to guarantee that the magnetic disk 1 will be accurately positioned at a predetermined mounting point (on the upper surface of the flange portion 8a).

In addition, according to another conventional example in which a mechanism for forcibly pressing the setter hub 3 against the spindle 8 is disposed on the north face of the center hub 3, as described above, when the disk rotating motor 7 is under load from these mechanisms, Since it rotates, its load increases, causing uneven rotation.

Embodiments of the present invention that eliminate the drawbacks of the prior art described above include:
It is shown in FIGS. 3(a) to (C) and FIG.

FIG. 3 is a side sectional view of the record carrier loading device, and FIG.
) shows the state in which the cassette Φ holder is raised.
Figure b) shows the state in which the cassette holder has been lowered, Figure 4(C) shows the state in which the pressing means is acting on the lowered cassette holder, and Figure 4 shows the control circuit thereof.

In Figures 3 (&) to (C), members having basically the same configuration and function as those in Figures 1 and 2 are
Since they are indicated by the same reference numerals in FIG. 2 and FIG. 2, their explanation will be omitted.

Reference numeral 21 denotes a cassette-holder which can be displaced in the directions of arrows A and B as shown in FIG. It is taken out. Note that the cassette holder 21 is attached to the chassis 6 by means not shown.
It is movable between the raised position shown in FIG. 13(a) and the lowered positions shown in FIGS. 13(b) and 13(C), and is positioned in these positions by means not shown. Reference numeral 22 denotes a support portion for the cassette 2, and a plurality of support portions are provided on the shear 6.

These may be configured integrally with the chassis 6.

Alternatively, it may be configured separately.

An arm 23 is an example of a pressing means in the present invention, and is configured to be rotatable about a shaft 24. Axis 2
4 is attached to a rising portion 21a provided on the upper surface of the cassette holder 21. 23a is the pressing end of the arm 23, and as shown in FIG. 3(C), when the arm 23 is
By rotating in one direction, the opening 21 of the cassette holder 21
d through which the setter hub 3 is pushed with its end 23a against the spindle 8. For this purpose, two knife-shaped ends 23a (i.e. fork-shaped pressing parts) are provided, each as shown in FIG. 3(a). ) may be configured to press the top surface of the center hub 3 at two points in the diametrical direction on the front and back sides of the page, or alternatively, a top plate may be provided on the top surface of the center hub 3 and the top plate may be pressed at the center position of the top plate. End 2
3a may be used.

In addition, when pushing the center hub 3 into the spindle 8,
Seven lunges 8a of the spindle 8 serve as a reference surface for determining the height of the center hub 3.

In addition, a portion 23b continuous to the end 23a of the arm 23 is
As shown in FIG. 3, by giving elasticity to the narrow neck 23b as the m-neck, the excessive pushing when pushing the center hub 3 is reduced to the narrow neck 23b as shown in FIG. 3(C).
It can be absorbed by the deflection of 3b.

25 is a spring that urges the arm 23 in the counterclockwise direction, and the spring hook on the arm 23 is attached to the pin 23C and the cassette holder 21.
The spring hook of the rising portion ztb is stretched between it and pin/21c. Note that the tip of the rising portion 21b and the arm 23
The counterclockwise rotation of the arm 23 is restricted by abutment with the lower end surface of the arm 23, and in the above-described abutment state, the pressing end 23a of the arm 23 is
) and (b), it is maintained in a state where it does not enter the internal space of the cassette holder 21.

26 is a solenoid, which is mounted on the chassis 6. 26a is an armature of the solenoid 26, and when the solenoid 26 is energized.

It is caused to protrude by a predetermined amount in response to magnetic repulsion.

As shown in FIG. 3(b), the solenoid 26 is configured such that when the arm 23 is lowered together with the cassette holder 2I, the armature rod 26a is closely opposed to the bent portion 23d at the tail end of the arm 23. 1! l! It is set up.

27 is a normally open type switch, as shown in Fig. 3(b).

The recess 6a of the jar 76 is disposed so as to be closed by the end of the cassette holder 21 when the cassette holder 21 is lowered as shown in FIG. 7C.

28 is opened by a portion thereof when the cassette-holder 21 is in the raised position shown in FIG. 3(a);
tS3 It is a normally closed switch that closes due to its own conductivity when in the lowered position shown in FIGS. 3(b) and 3(c), and is fixedly disposed at a suitable location within the recording or reproducing apparatus.

In FIG. 4, reference numeral 29 denotes a normally open type cassette detection switch 1 installed at a proper position in the cassette holder 21 so that the cassette holder 21 is closed after the cassette 2 is inserted into the cassette holder 21 to a predetermined position. As shown, the switch 27
is switch 29. Along with resistors R1 and R2, the power supply (+Vc
c) and circuit ground, and switch 28 is connected in parallel to the series response of switch 27 and resistor R2.

30 responds to the high potential of the connection point a between the switch 27 and the resistor R2, and activates the solenoid for a period sufficient to ensure that the disk ψ center hub 3 is pressed onto the spindle 8 by the aforementioned 7-me 23. 26 is a one-shot circuit (mono-phrase multi-vibrator) that generates a high Φ level pulse for energizing circuit 26; while in.

This is a solenoid drive circuit that energizes the solenoid 26.

32 is set by a change in the potential at the connection point between switch +29 and switch 28 from high to low.
Falling period type R5y lip-70 tube connected to be reset by falling of output pulse from yacht circuit 30, 33 is a Q output of the clip contest 70 tube 32 and a recording standby circuit or playback command (not shown). An OR gate that receives a motor rotation command from the circuit; 34 is an OR gate;
This is a motor drive circuit that operates the motor 7 in response to the high output of the gate 33.

Next, the composition of 4! The operation of the device will be explained.

First, I of the cassette holder 21 shown in No. 31Δ(a)
: “It-like Ig; magnetic disk cassette 2
When the is inserted into the cassette holder 21 to the specified position, the switch 29 shown in Figure 7114 is closed.
Next, when the cassette holder 21 is lowered in the direction of arrow A from this state, the switch 28 is activated at the start of this lowering.
is closed, and therefore, in FIG. 4, flip-flop 32 is set and its Q output goes high, causing motor drive # circuit 34 to start motor 7.

In order to lower the cassette holder 21 in the direction of arrow A, connect the holder 21 to the device main body or its lid using a hinge provided on the back side of the paper in FIG. It may be lowered by a driver.

Now, as shown in FIG. 3(b), the cassette holder 2
1 reaches the lowered position, the cassette holder 21 is locked in that lowered position by means not shown. At this time, the bent portion 23d at the tail end of the 7-m 23 closely opposes the armature rod 26a of the solenoid 26, and the normally open switch 27 is closed by the end of the cassette holder 21. When the normally open switch 27 is closed, the fourth
In the figure, one shot circuit 30 generates a high level red pulse, and solenoid drive circuit 31 energizes thread/id 26 while this pulse is high level.

When the solenoid 26 is energized, the armature rod 26a protrudes as shown in FIG.
The arm 23 rotates clockwise against the spring 25, and at this time, the push end 23a pushes the setter hub 3 of the magnetic disk l against the spindle 8 as shown in FIG. 3(c). It is brought into contact with the reference surface of the flange portion 8a of the spindle 8. .

In addition, as shown in FIG. 3(C), the excessive pushing amount at that time is absorbed by the bending of the # neck portion 23b of the arm 23, so there is no possibility of damage to the center false hub 3, the flange portion 8a of the spindle 8, etc. There is no risk of this happening.

When the pulse output from the one-noyot circuit 30 is finished and the power to the solenoid 26 is cut off, the armature 26a is lowered and the arm 23 is rotated counterclockwise by the spring 25.

The state shown in 31.DELTA.(b) is reached, and the pressing operation of the pressing portion 23a of the 7-arm 23 against the center hub 3 is released.

Note that when the pulse output from the one-shot circuit 30 ends, the flip-flop 32 is reset and its Q output becomes low, so that the motor 7 is stopped. Thereafter, the motor 7 is rotated by a motor rotation command during recording or reproduction.

As described above, in this embodiment, since the arm 23 presses the disk center hub 3 while the spindle 8 rotates, the spindle 8 of the center hub 3
To! The J attachment is smoothed, and the pressure on the center hub 3 is also made uniform, so that the attachment can be carried out satisfactorily.

In the configuration of the above embodiment, the switch 27 and the one-shot circuit 30 constitute seven control stages for temporarily operating the arm 23, which is the pressing means, and the switch 2
8 and flip prop 32 are cassette holder 21
This constitutes a control means that starts the motor 7 and therefore the spindle 8, which is a one-rotation driving member, in connection with the lowering of the arm 23, and stops the operation of the motor 7 and the spindle 8 when the pushing operation of the arm 23 is released. .

By the way, if you want to operate the video Φ camera and take a picture quickly, for example, if you have a chance to take a photo, insert the cassette 2 into the cassette holder 21, then turn the cassette holder 21 on. It is safe to quickly perform a series of operations such as lowering the disc to the predetermined recording position (3rd (4(b), (c)) and rotating the disc rotation motor 7. Therefore, for example, the disc loading operation It is useful to quickly bring the motor 7 to a predetermined number of revolutions while performing this process, in order to record a high-quality image.
By omitting the flop 32 and the OR gate 33, the connection b"
It is also possible to directly apply a single point signal to the motor drive circuit 34 as a motor rotation command.

In addition, in this case, press 7-mu 23 (i'): end frB2
3a may be configured to be freely rotatable with respect to the center hub 3. An example of this case is shown in tJS5 diagram.

FIG. 5(a) shows a side sectional view of the pressing member attached to the end of the arm, and FIG. 5(b) shows a side view of the pressing member in contact with the center hub of the magnetic disk. .

In FIG. 5(a), reference numeral 30 denotes an arm that is rotated clockwise by the force of the solenoid 26 shown in FIG. In addition, this arm 30 may be provided with a thin neck portion 23b having elasticity in a part thereof, as shown in FIG. fiS3, or may be provided with no thin neck portion 23b.

31 is a hole penetrated at the tip of the arm 30;

A coupling @32 is inserted into the hole 31 so as to be rotatable and slidable in the vertical direction. A pullout pin 33 is inserted through the L end of the connecting shaft 32 in the diametrical direction. 37
is a disc-shaped member fixed to the lowermost end of the connecting shaft 32,
A spring 34 is stretched between the disk-shaped member 37 and the arm 30. The disk-shaped member 37 has an inverted conical shape with an annular flat surface that comes into contact with the upper end surface of the center hub 3. A member 36 is attached by a screw pin 35. The inverted conical member 36 forms a rotational position relative to the screw pin 35. Note that instead of the inverted conical member 36,
A cylindrical member with an annular flat surface can also be used.

In FIG. 5(b), as shown in FIG. 3(b), when the switch 27 is closed by the lowering of the cassette holder 21 and the solenoid 26 is energized, the arm 30 is rotated clockwise. . As a result, the annular flat surface of the inverted conical member 36 comes into contact with the upper end surface of the center hub 3.

As the arm 300 rotates further in the clockwise direction, the arm 30 applies a pressing force to the upper end surface of the center hub 3 via the spring 34 and the inverted conical member 36. Since the inverted conical member 36 is rotatable with respect to the screw pin 35, the spindle 8 which has started one rotation moves the safety gear 0 to 0.
A pressing force is applied to the center hub 3 while being rotated together with the hub 3, and the center hub 3 is attached to the spindle 8. Then, by the operation of the circuit shown in FIG. The rotation returns to normal, and the inverted conical member 36 moves away from the center hub 3.

As is clear from the above description, since the inverted conical member that applies a pressing force to the center hub 3 is configured to be rotatable, even if the spindle 8 starts rotating, it will not be braked. , the disk rotation motor 7 can quickly reach the predetermined rotation speed without applying a large load, and therefore the time required for the disk rotation motor 7 to reach the predetermined rotation speed is not increased; and , there is no disturbance to the servo system, and no sliding noise due to yi friction is generated during the pressing operation.

Note that, in the present invention, as in the conventional example explained in FIG. This does not preclude the use of both loading methods.

〔effect〕

1; As explained above, according to the present invention, a pressing means for pressing the record carrier against the recording carrier rotation driving member is provided, and this pressing means is temporarily activated by the operation r of the rotation driving member to perform recording. Record Q carrier No. 1! Since the record carrier is attached to the rotary drive member, the record carrier can be attached to the rotation drive member smoothly, and the pressure on the record carrier is also uniform, so that the attachment can be carried out smoothly. Become. Furthermore, the press stage is temporarily operated to turn the record carrier into a record carrier rotation drive member! As shown in the figure, the size of the single-rotation driving member can be reduced.

[Brief explanation of drawings]

:ttJ1 Figure is a perspective view of a magnetic disk cassette. FIG. 2 is an exploded sectional view of an example of a conventional record carrier loading device.
FIGS. 3(a), 3(b), and 3(c) are cross-sectional views of an embodiment of the record carrier loading device according to the present invention, in which FIG. 3(a) shows a state in which the cassette holder is raised, and FIG. ) shows a cross-sectional view of the state in which the cassette holder is lowered, and (C) shows a cross-sectional view of the state in which the pressing means is operated with the cassette holder in the lowered state, and FIG. 4 is a diagram showing the control circuit thereof, FIGS. 5(a) and 5(b) show another embodiment;
(a) shows a side sectional view of the pressing member, and (b) shows a side view of the pressing member in contact with the center hub. In the figure, l is a magnetic disk, 2 is a cassette, 3 is a center hub, 7 is a disk rotation motor, 8 is a disk rotation spindle, 21 is a cassette e-holder, 23 is an arm, 2
6 is a solenoid, 26a is an armature, 27,2
8.29 is a switch, 30 is a one-shot circuit, 31
is the solenoid drive circuit, 32 is the clip/70 knob, 3
4 is a motor drive circuit. 7 Sleeve Figure 3 ((1)

Claims (2)

[Claims] (1) A record carrier holder movable between a first position for receiving and taking out a record carrier and a second position for mounting the received record carrier on the record carrier rotation drive member; , first control means for activating the rotary drive member in connection with movement of the holder from the first position to the second position; and mounting the record carrier on the rotary drive member. A record carrier loading device comprising a pressing means for pressing a portion of the rotational drive member, and a second control means for temporarily operating the pressing means when the rotational drive member is in operation. . (2) The record carrier loading device according to claim 1, wherein the first control means is configured to stop the operation of the rotary drive member when the operation of the pressing means is released.